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diff --git a/macros/latex/contrib/stringstrings/stringstrings.dtx b/macros/latex/contrib/stringstrings/stringstrings.dtx index 24baeeda9c..9f0effbb27 100644 --- a/macros/latex/contrib/stringstrings/stringstrings.dtx +++ b/macros/latex/contrib/stringstrings/stringstrings.dtx @@ -1,4385 +1,4386 @@ -% \iffalse -%<package>\ProvidesPackage{stringstrings} -%<package>[2015/02/02 v1.23 -%<package> Extensive array of string manipulation routines for -%<package> cosmetic and programming application] -%<package>\NeedsTeXFormat{LaTeX2e} -%<*driver> -% This work may be distributed and/or modified under the -% conditions of the LaTeX Project Public License, either version 1.3 -% of this license or (at your option) any later version. -% The latest version of this license is in -% http://www.latex-project.org/lppl.txt -% and version 1.3c or later is part of all distributions of LaTeX -% version 2005/12/01 or later. -% -% This work has the LPPL maintenance status `maintained'. -% -% The Current Maintainer of this work is Steven B. Segletes. -% -% v1.00 -Initial Release -% v1.01 -Included support for & character, though it loses catcode 4 -% status -% v1.02 -Bug fix. Needed some % chars in \convertchar to avoid extra spaces -% v1.03 -Documentation fix; notably removed 's' from \narg in \getargs -% v1.04 -Removed \rotate command, as it conflicts with environment in -% \usepackage{rotating} -% v1.10 -Fixed bug in convertword by adding @@@stringsize definition to -% \whereisword -% -Added suite of routines to support \capitalizetitle functionality -% v1.20 -Added ability to encode/decode arbitrary tokens -% v1.21 -Added %, removing extra space (bug) from \whereisword -% v1.22 -Added %, removing extra space (bug) from \getargs -% v1.23 -Changed {~} to {\ } in \retokenizechar -% -Forced all stringtest commands to function outside of math mode -% which will give correct result, when invoked within math mode. -\documentclass{ltxdoc} -\usepackage{stringstrings} -\DisableCrossrefs -\CodelineNumbered -% DEFINE SOME CAMMANDS THAT ARE EASIER HERE THAN IN DocInput ENVIRONMENT -\newcommand\stringstrings{\textsf{stringstrings}~} -\newcommand\coolstr{\textsf{coolstr}~} -% ITALICIZED i.e., -\newcommand{\ie}{\textit{i.e.},~}% -% ITALICIZED e.g., -\newcommand{\eg}{\textit{e.g.},~}% -% ITALICIZED etc. -\newcommand{\etc}{\textit{etc}.}% -\def\modetablelayout{|l|c|c|c|} -\def\mylayout{@{}c|c|l@{}} -\stringencode{\|} -\stringdecode[q]{\thestring} -\edef\mypipe{\thestring} -\stringencode{\carat} -\stringdecode[q]{\thestring} -\edef\mycarat{\thestring} - -\GetFileInfo{stringstrings.sty} -\begin{document} - \title{The \stringstrings Package\\ - \rule{0em}{0.7em}\small\fileinfo} - \author{Steven B. Segletes\\ - steven.b.segletes.civ@mail.mil} - \date{\filedate\\ - \fileversion} - \maketitle - \DocInput{stringstrings.dtx} -\end{document} -%</driver> -%\fi -% \parskip 1ex -% \begin{abstract} -% The \stringstrings package provides a large and sundry array of routines -% for the manipulation of strings. The routines are developed not only -% for cosmetic application, such as the changing of letter -% cases, selective removal of character classes, and string -% substitution, -% but also for programming application, such as character look-ahead -% applications, argument parsing, |\if|-tests for various string -% conditions, etc. A key tenet employed during the -% development of this package (unlike, for comparison, the |\uppercase| -% and |\lowercase| routines) was to have resultant strings be -% ``expanded'' (\ie the product of an |\edef|), so that the -% \stringstrings routines could be strung together sequentially and -% nested (after a fashion) to achieve very complex manipulations. -% -% \end{abstract} -% -% \vspace{-.55em} -% \tableofcontents\rule[.2em]{4.5in}{.3mm}\vspace{-1.5em} -% -% \section {Motivation} -% -% There were two seminal moments that brought about my motivation to -% develop this package. The first was the realization of the oft -% cited and infamous \LaTeX{} limitation concerning the inability to -% nest letter-case changes with \LaTeX{}'s intrinsic |\uppercase| and -% |\lowercase| routines. The second, -% though not diminishing its utility in many useful applications, was -% the inherent limitations of the \coolstr package, which is otherwise -% a useful tool for extracting substrings and measuring string lengths. -% -% The former is well documented and need not be delved into in great -% detail. Basically, as it was explained to me, |\uppercase| and -% |\lowercase| are expanded by \LaTeX{} at the last possible moment, and -% thus attempts to capture their result for subsequent use are doomed to -% failure. One is forced to adopt the left-to-right (rather than -% nested) approach to case changes. -% -% In the case of the \coolstr package, I again want to express -% my admiration for the utility of this package. I briefly considered -% building the \stringstrings package around it, but it proved -% unworkable, because of some intrinsic limitations. -% First, \coolstr operates on -% strings, not tokens, and so in order to fool it into working on -% tokenized inputs, one must use the cumbersome nomenclature of -% -% |\expandafter\substr\expandafter{\TokenizedString}{...}{...}| -% \vspace{1ex}\\% -% in order to, for example grab a substring of |\TokenizedString|. One -% may |\def| the result of this subroutine, and use it elsewhere in an -% unaltered state. However, one may not expand, via |\edef|, the -% result of |\substr| in order to use it as input to a subsequent string -% manipulation. And thus, the desire to engage in successive string -% manipulations of different natures (\eg capitalization of leading -% characters, extraction of words, reversal of character sequence, -% removal of character classes, etc., etc.) are not achievable in the -% context of \textsf{coolstr}. -% -% It was this state of affairs that brought me to hunger for routines -% that could thoroughly manipulate strings, and yet produce their result -% ``in the clear'' (\ie in an untokenized form) which could be used as -% input for the next manipulation. It turns out the heart of the -% \stringstrings package which achieves this goal is based on the simple -% (if much maligned) |\if| construct of \LaTeX{}, by using successive -% iterations of the following construct: -% -% |\if <|\textit{test char.}|><|\textit{string}|><|\textit{manipulated -% test char.}|>\else ...\fi| -% \vspace{1ex}\\% -% in which a character at the begining of a string is tested. If a -% match is found, -% the manipulated test character is replaced at the end of the string, -% while the original test character is lopped off from the beginning of -% the string. A false result is used to proceed to a different test -% character. In this manner, the string may be rotated through, -% character by character, performing the desired manipulations. And, -% most importantly, the product of this operation may be placed into an -% |\edef|. -% -% It turns out there was one glitch to this process (which has been -% successfully remedied in the \stringstrings package). And that is that -% there are several tokenized \LaTeX{} symbols (\eg |\$|, |\{|, |\}|, -% |\AE|, |\oe|, etc.) which expand to more than a single byte. If -% I was more savvy on \LaTeX{} constructs, I would probably have known -% how to handle this better. But my solution was to develop my own -% encoding scheme wherein these problematic characters were re-encoded -% in my intermediate calculations as a 2-byte (escape character-escape code) -% combination, and only converted back into \LaTeX{} symbols at the last -% moment, as the finalized strings were handed back to the user. -% -% There are also several tokens, like |\dag|, |\ddag|, |\P|, |\d|, |\t|, -% |\b|, and |\copyright| which -% can not be put into an |\edef| construct. The solution developed for -% strings containing these such characters was to convert the encoded -% string not into an expanded |\edef| construct, but rather back into a -% tokenized form amenable to |\def|. The |\retokenize| command -% accomplishes this task and several others. -% -% There was also one glitch that I have not yet been able to resolve -% to my full satisfaction, though I have provided a workaround. -% And that is the occurance of \LaTeX{} grouping characters, |{| and -% |}|, that might typically occur in math mode. The problem is that the -% character-rotate technique that is the core of \stringstrings breaks -% when rotating these group characters. Why?? Because a string -% comprised of |...{...}...|, during the rotation process, will -% eventually become |...}......{| during an intermediate stage of -% character rotation. This -% latter string breaks \LaTeX{} because it is not a properly constructed -% grouping, even if subsequent rotations would intend to bring it back -% into a proper construction. -% -% And so, while \stringstrings can handle certain math-mode -% constructs (\eg |$|, |^|, and |_|), it is unable to {\it directly} -% handle groupings that are brought about by the use of curly braces. -% Note that |\{| and |\}| are handled just fine, but not |{| and |}|. -% As a result of this limitation regarding the use of grouping braces -% within strings, \stringstrings support for various math symbols -% remains quite limited. -% -% While it is also common to use curly braces to -% delimit the arguments of diacritcal marks in words like -% |m\"{u}de| \etc, the same result can be achieved without the -% use of braces as |m\"ude|, with the proper result obtained: m\"ude. -% For diacritical marks that have an alphabetic token such as the breve, -% given by |\u|, the curly braces can also be omitted, with the only -% change being a space required after the |\u| to delimit the token. -% Thus, |c\u at| becomes c\u at. Therefore, when manipulating strings -% containing diacritical marks, it is best to formulate them, if -% possible, without the use of curly braces. -% -% The workaround fix I have developed, to provide grouping functions -% within \stringstrings arguments, involves the use of newly defined -% tokens |\LB| and |\RB| (to be used in lieu of |{| and |}|), -% along with a command |\retokenize|. This -% workaround will be described subsequently, in the Disclaimers section. -% -% \section{Philosophy of Operation} -% -% There are several classes of commands that have been developed as part -% of the \stringstrings package. In addition to {\bf Configuration -% Commands}, which set parameters for subsequent string operations, -% there are the following command classes: -% \begin{itemize} -% \item {\bf Commands to Manipulate Strings} -- these commands take an -% input string or token and perform a specific manipulation on the -% string; -% \item {\bf Commands to Extract String Information} -- these commands -% take an input string or token, and ascertain a particular -% characteristic of the string; and -% \item {\bf Commands to Test Strings} -- these commands take an input -% string or token and test for a particular alphanumeric condition. -% \end{itemize} -% Of course, there are also {\bf Support Commands} which are low-level -% routines which provide functionality to the package, which are -% generally not accessible to the user. -% -% To support the intended philosophy that the user may achieve a complex -% string manipulation though a series of simpler manipulations (which -% is otherwise known as nesting), a mechanism had to be developed. True -% command nesting of the form |\commandA{\commandB{\commandC{string}}}| -% is {\bf not} supported by the \stringstrings package, since many of -% the manipulation commands make use of (and would thus inadvertantly -% overwrite) the same sets of variables used by other routines. -% Furthermore, there is that 'ol left-to-right philosophy of \LaTeX{} to -% contend with. -% -% Instead, for the case of commands that manipulate strings, the expanded -% (\ie |\edef|'ed) result of the manipulation is placed into a string -% called |\thestring|\DescribeMacro{\thestring}. Then, |\thestring| -% may either be directly used -% as the input to a subsequent operation, or |\edef|'ed into another -% variable to save it for future use. -% -% String manipulation commands use an optional first argument to specify -% what to do with the manipulated string (in addition to putting it in -% |\thestring|). Most string manipulation -% commands default to verbose mode |[v]|\DescribeMacro{[v]}, and print -% out their result immediately on the assumption that a simple string -% manipulation is, many times, all that is required. If the user wishes -% to use the manipulated result as is, but needs to use it later in the -% document, a quiet mode |[q]| \DescribeMacro{[q]} is provided which -% suppresses the immediate output of |\thestring|. -% -% In the absence of symbol tokens (\eg |\$|, |\&|, |\oe|, |\^|, \etc), -% the verbose and quiet modes would prove sufficient. However, when a -% tokenized symbol is |\edef|'ed, the token is expanded to the actual -% symbolic representation of the character. If this expanded symbol is -% used as part of an input string to a -% subsequent \stringstrings manipulation -% routine, it gets confused, because the means to detect the token are -% characteristically different than the means to detect the expanded -% symbol. Thus, if one wishes to use |\thestring| as an input to a -% subsequent manipulation routine, \stringstrings provides an encoded -% mode |[e]| \DescribeMacro{[e]} which places an encoded version of the -% resulting manipulation into -% |\thestring|. The encoded mode is also a quiet mode, since it leaves -% |\thestring| in a visually unappealing state that is intended for -% subsequent manipulation. -% -% The encoded mode is not a \LaTeX{} standard, -% but was developed for this application. And therefore, if the result -% of a \stringstrings manipulation is needed as input for a routine -% outside of the \stringstrings package, the encoded mode will be of no -% use. For this reason (and others), -% the |\retokenize| \DescribeMacro{\retokenize} -% command is provided. Its use is one of only three times that a -% \stringstrings command -% returns a tokenized |\def|'ed string in |\thestring|, rather than an -% expanded, |\edef|'ed string. And in the other two cases, both -% call upon |\retokenize|. -% -% In addition to providing tokenized strings that can be passed to other -% \LaTeX{} packages, |\retokenize| can also remedy \stringstrings problems -% associated with inadequate character encodings (OT1) and the use of -% grouping characters |{| and |}| within \stringstrings arguments. This -% issue is discussed more fully in the Disclaimers section, and in the -% actual |\retokenize| command description. -% -% Therefore, for complex multistage string manipulations, the -% recommended procedure -% is to perform each stage of the manipulation in encoded |[e]| mode, -% passing along |\thestring| to each subsequent stage of the -% manipulation, until the very last manipulation, which should be, -% at the last, performed in verbose |[v]| or quiet |[q]| modes. If -% the resulting manipulation is to be passed to a command outside of the -% \stringstrings package for further manipulation (or if the string -% contains characters which cannot be placed into an |\edef|), -% |\thestring| may -% need to be |\retokenize|'ed. If concatenations of two (or more) different -% manipulations are to be used as input to a third manipulation, -% |\thestring| from the first manipulation will need to be immediately -% |\edef|'ed into a different variable, since |\thestring| will be -% overwritten by the second manipulation (see Table~\ref{tbl:modes} -% for summary). -% \begin{table}[h] -% \begin{center} -% \caption{\bf Execution Modes of \stringstrings Commands -% \label{tbl:modes}}\vspace{0.5em} -% \small -% \begin{tabular}\modetablelayout -% \hline -% Mode & Coding & Use when result is & |\thestring| is\\ -% \hline -% \hline -% |[v]| verbose & decoded or retokenized & final & echoed \\ -% |[q]| quiet & decoded or retokenized & final & not echoed \\ -% |[e]| encoded & encoded & intermediate & not echoed \\ -% \hline -% \end{tabular} -% \end{center} -% \end{table} -% -% Moving on to commands that extract string information, this class of -% commands (unless otherwise noted) output their result into a token -% which is given the name |\theresult|\DescribeMacro{\theresult}. -% This token does not contain a manipulated form of the string, but -% rather a piece of information about the string, such as ``how many -% characters are in the string?'', ``how many words are in the string?'', -% ``how many letter `e's are in the string?'', \etc -% -% The final class of \stringstrings commands are the string-test -% commands. While some of this class of commands also store their -% test result in |\theresult|, most of these commands use the -% |\test|{\it condition}|{|{\it string}|}| |\if|{\it -% condition} constructs (see {\sf ifthen} package) to answer true/false -% questions like ``is the string composed entirely of lowercase -% characters?'', ``is the string's first letter capitalized?'' \etc -% -% \section {Configuration Commands} -% -% \noindent% -% |\Treatments{|{\it U-mode}|}{|{\it l-mode}|}{|{\it p-mode}|}{|{\it% -% n-mode}|}{|{\it s-mode}|}{|{\it b-mode}|}|\\ -% |\defaultTreatments|\\ -% |\encodetoken[|{\it index}|]{|{\it token}|}|\\ -% |\decodetoken[|{\it index}|]{|{\it token}|}|\\ -% |\+|\\ -% |\?| -% -% The command |\Treatments| \DescribeMacro{\Treatments} -% is used to define how different classes of -% characters are to be treated by the command |\substring|, which is the -% brains of the \stringstrings package. As will be explained in the -% next section, most string manipulation routines end up calling -% |\substring|, the difference between them being a matter of how these -% character treatments are set prior to the call. -% Because most string manipulation -% commands will set the treatments as necessary to perform their given -% task, and reset them to the default upon conclusion, one should set -% the |\Treatments| immediately prior to the call upon |\substring|. -% -% |\Treatments| has six arguments, that define the mode of treatment -% for the six classes of characters that \stringstrings has designated. -% All modes are one-digit integers. They are described below: -% \begin{itemize} -% \item{\it U-mode---} This mode defines the -% treatment for the upper-case characters (A--Z, \OE, \AE, \AA, \O, and -% \L). -% A mode of 0 tells |\substring| to remove upper-case characters, a -% mode of 1 indicates to leave upper-case characters alone, and -% a mode of 2 indicates to change the case of upper-case -% characters to lower case. -% -% \item {\it l-mode---} This mode defines the -% treatment for the lower-case characters (a--z, \oe, \ae, \aa, \o, \l, -% and \ss). -% A mode of 0 tells |\substring| to remove lower-case characters, a -% mode of 1 indicates to leave lower-case characters alone, and -% a mode of 2 indicates to change the case of lower-case -% characters to upper case. In the case of the eszett character (\ss), -% there is no uppercase equivalent, and so an {\it l-mode} of 2 will -% leave the eszett unchanged. -% -% \item {\it p-mode---} This mode defines the -% treatment for the punctuation characters. \stringstrings -% defines the punctuation characters as ; : ' " , . ? ` and ! A mode of -% 0 tells |\substring| to remove punctuation characters, while a mode of -% 1 indicates to leave punctuation characters as is. -% -% \item {\it n-mode---} This mode defines the -% treatment for the numerals (0--9). A mode of -% 0 tells |\substring| to remove numerals, while a mode of -% 1 indicates to leave numerals as is. -% -% \item {\it s-mode---} This mode defines the -% treatment for the symbols. \stringstrings -% defines symbols as the following characters and diacritical marks: -% \substring{/ * ( ) - = + [ ] $<$ $>$}{1}{$} \& |\& \% \# \{ \} \_ \$| -% \dag~\ddag~\S~\P~\L~\pounds~\copyright~\v x \^x \~x \"x \`x \'x \=x -% \.x \u x \v x -% \H x \c x \d x \t{xx} \b x as well as |@|, math and text carats, -% and the pipe symbol. A mode of -% 0 tells |\substring| to remove symbols, while a mode of -% 1 indicates to leave symbols as is. Note that the \$ symbol, when -% used for entering and exiting math mode, is left intact, regardless of -% {\it s-mode}. -% -% % \item {\it b-mode---} This mode defines the -% treatment for blankspaces. A mode of -% 0 tells |\substring| to remove blankspaces, while a mode of -% 1 indicates to leave blankspaces as is. The treatment apples to both -% soft (~) as well as hard (|~|) spaces. -% \end{itemize} -% -% The command |\defaultTreatments| \DescribeMacro{\defaultTreatments} -% resets all treatment modes to their default settings, which are to -% leave individual characters unaltered by a string manipulation. -% -% The commands |\encodetoken| \DescribeMacro{\encodetoken} and -% |\decodetoken| \DescribeMacro{\decodetoken} have been introduced in -% \stringstrings v1.20. Prior to this version, the ability of -% \stringstrings to handle a particular token was dependent on whether -% provisions for encoding that token had been explicitly hardwired into -% the \stringstrings package. A large number of alphabetic and -% diacritical marks had reserved encodings set aside in \stringstrings -% for their treatment (see next paragraph or Table 2 for their enumeration). -% However, requests would invariable come in for treating yet another -% token, which required a new \stringstrings release for each revision. -% The command |\encodetoken| allows the user to specify an arbitrary -% token, to be assigned to the reserved encoding slot associated with the -% index (permissible indices are in the range 1--3, 1 being the default). -% Once assigned an encoding slot, a token may be successfully manipulated in -% \stringstrings routines. Once \stringstrings manipulation is -% complete, the token must undergo a |\decodetoken| operation in order -% for that token to be reset to a normal \LaTeX{} token again (lest it -% display in its encoded \stringstrings form). -% -% The commands |\+| and |\?| \DescribeMacro{\+}\DescribeMacro{\?} -% are a pair that work in tandem to turn on \stringstrings encoding and -% turn off \stringstrings encoding, respectively. Generally, the user -% will not need these commands unless he is writing his own routines to -% take advantage of the \stringstrings library. After |\+| is called, -% tokens which would otherwise expand to multi-byte sequences are -% instead encoded according to the \stringstrings methodology. The -% affected tokens -% include -% |\$ \^ \" \{ \} \_ \dag \ddag \P \S \ss \AA \aa \O \o \AE \ae| -% |\OE|, |\oe|, |\~|, |\`|, |\'|, |\=|, |\.|, |\u|, |\v|, |\H|, |\c|, -% |\d|, |\t|, |\b|, |\copyright|, |\pounds|, |\L|, |\l|, and |\ss|. In -% addition, pipes, text carats, and hard spaces (|~|) are encoded -% as well. The command |\?| restores the -% standard \LaTeX{} encoding for these tokens. -% -% \section {Commands to Manipulate Strings} -% -% These commands take an -% input string or token and perform a specific manipulation on the -% string. They include: -% -% \noindent|\substring[|{\it mode}|]{|{\it -% string}|}{|{\it min}|}{|{\it max}|}|\\ -% |\caseupper[|{\it mode}|]{|{\it string}|}|\\ -% |\caselower[|{\it mode}|]{|{\it string}|}|\\ -% |\solelyuppercase[|{\it mode}|]{|{\it string}|}|\\ -% |\solelylowercase[|{\it mode}|]{|{\it string}|}|\\ -% |\changecase[|{\it mode}|]{|{\it string}|}|\\ -% |\noblanks[|{\it mode}|]{|{\it string}|}|\\ -% |\nosymbolsnumerals[|{\it mode}|]{|{\it string}|}|\\ -% |\alphabetic[|{\it mode}|]{|{\it string}|}|\\ -% |\capitalize[|{\it mode}|]{|{\it string}|}|\\ -% |\capitalizewords[|{\it mode}|]{|{\it string}|}|\\ -% |\capitalizetitle[|{\it mode}|]{|{\it string}|}|\\ -% |\addlcword{|{\it word}|}|\\ -% |\addlcwords{|{\it word1 word2 word3 \ldots}|}|\\ -% |\resetlcwords|\\ -% |\reversestring[|{\it mode}|]{|{\it string}|}|\\ -% |\convertchar[|{\it mode}|]{|{\it -% string}|}{|{\it from-char}|}{|{\it to-string}|}|\\ -% |\convertword[|{\it mode}|]{|{\it -% string}|}{|{\it from-string}|}{|{\it to-string}|}|\\ -% |\rotateword[|{\it mode}|]{|{\it string}|}|\\ -% |\removeword[|{\it mode}|]{|{\it string}|}|\\ -% |\getnextword[|{\it mode}|]{|{\it string}|}|\\ -% |\getaword[|{\it mode}|]{|{\it string}|}{|{\it n}|}|\\ -% |\rotateleadingspaces[|{\it mode}|]{|{\it string}|}|\\ -% |\removeleadingspaces[|{\it mode}|]{|{\it string}|}|\\ -% |\stringencode[|{\it mode}|]{|{\it string}|}|\\ -% |\stringdecode[|{\it mode}|]{|{\it string}|}|\\ -% |\gobblechar[|{\it mode}|]{|{\it string}|}|\\ -% |\gobblechars[|{\it mode}|]{|{\it string}|}{|{\it n}|}|\\ -% |\retokenize[|{\it mode}|]{|{\it string}|}| -% -% \noindent -% Unless otherwise noted, the {\it mode} may take one of three values: -% |[v]| for verbose mode (generally, the default), |[q]| for quiet mode, -% and |[e]| for encoded mode. In all cases, the result of -% the operation is stored in |\thestring|. In verbose mode, it is also -% output immediately (and may be captured by an |\edef|). In quiet mode, -% no string is output, though the result still resides in |\thestring|. -% Encoded mode is also a quiet mode. However, the encoded mode saves -% the string with its \stringstrings encodings. Encoded mode indicates -% that the result is an intermediate result which will be subsequently -% used as input to another \stringstrings manipulation. -% -% The command |\substring| \DescribeMacro{\substring} is the brains of -% the \stringstrings package, in that most of the commands in this -% section call upon |\substring| in one form or another. Nominally, the -% routine returns a substring of {\it string} between the characters -% defined by the integers {\it min} and {\it max}, inclusive. -% However, the returned substring is -% affected by the designated |\Treatments| which have been defined -% for various classes of characters. Additionally, a shorthand of \$ -% may be used in {\it min} and {\it max} to define END-OF-STRING, and -% the shorthand \$--{\it integer} may be used to define an offset of -% {\it integer} relative to the END-OF-STRING. -% -% Regardless of how many bytes a \LaTeX{} token otherwise expands -% to, or how many characters are in the token name, each \LaTeX{} -% symbol token -% counts as a single character for the purposes of defining the -% substring limits, {\it min} and {\it max}. -% -% While the combination of |\Treatments| and |\substring| are sufficient -% to achieve a wide array of character manipulations, many of those -% possibilities are useful enough that separate commands have been -% created to describe them, for convenience. Several of the commands -% that follow fall into this category. -% -% The command |\caseupper| \DescribeMacro{\caseupper} takes the input -% string or token, and converts all lowercase characters in the string -% to uppercase. All other character classes are left untouched. -% Default mode is |[v]|. -% -% The command |\caselower| \DescribeMacro{\caselower} takes the input -% string or token, and converts all uppercase characters in the string -% to lowercase. All other character classes are left untouched. -% Default mode is |[v]|. -% -% The command |\solelyuppercase| \DescribeMacro{\solelyuppercase} is -% similar to |\caseupper|, except that all punctuation, numerals, and -% symbols are discarded from the string. Blankspaces are left alone, -% and lowercase characters are converted to uppercase. -% Default mode is |[v]|. -% -% The command |\solelylowercase| \DescribeMacro{\solelylowercase} is -% similar to |\caselower|, except that all punctuation, numerals, and -% symbols are discarded from the string. Blankspaces are left alone, -% and uppercase characters are converted to lowercase. -% Default mode is |[v]|. -% -% The command |\changecase| \DescribeMacro{\changecase} switches lower -% case to upper case and upper case to lower case. All other characters -% are left unchanged. -% Default mode is |[v]|. -% -% The command |\noblanks| \DescribeMacro{\noblanks} removes blankspaces -% (both hard and soft) from -% a string, while leaving other characters unchanged. -% Default mode is |[v]|. -% -% The command |\nosymbolsnumerals| \DescribeMacro{\nosymbolsnumerals} -% removes symbols and numerals from -% a string, while leaving other characters unchanged. -% Default mode is |[v]|. -% -% The command |\alphabetic| \DescribeMacro{\alphabetic} discards -% punctuation, symbols, and numerals, while retaining alphabetic -% characters and blankspaces. -% Default mode is |[v]|. -% -% The command |\capitalize| \DescribeMacro{\capitalize} turns the first -% character of {\it string} into its upper case, if it is alphabetic. -% Otherwise, that character will remain unaltered. -% Default mode is |[v]|. -% -% The command |\capitalizewords| \DescribeMacro{\capitalizewords} turns -% the first character of every word in {\it string} into its upper -% case, if it is alphabetic. -% Otherwise, that character will remain unaltered. For the purposes of -% this command, ``the first character of a word'' is defined as either -% the first character of the string, or the first non-blank -% character that follows one or more blankspaces. -% Default mode is |[v]|. -% -% The command |\capitalizetitle| \DescribeMacro{\capitalizetitle} is a -% command similar to |\capitalizewords|, except that words which have -% been previously designated as ``lower-case words'' are not -% capitalized (\eg prepositions, conjunctions, \etc). In all cases, -% the first word of the string is -% capitalized, even if it is on the lower-case word list. Words are -% added to the lower-case word list with the commands -% |\addlcword|\DescribeMacro{\addlcword}, in the case of a single word, -% or with |\addlcwords|\DescribeMacro{\addlcwords}, in the case of -% multiple (space-separated) words. Because the addition of many words -% to the lower-case list can substantially slow-down the execution of -% the |\capitalizetitle| command, the command -% |\resetlcwords| \DescribeMacro{\resetlcwords} has been added to -% allow the user to zero out the lower-case word list. -% (See newer \textsf{titlecaps} package as an alternative to this -% command.) -% -% The command |\reversestring| \DescribeMacro{\reversestring} reverses -% the sequence of characters in a string, such that what started as -% the first character becomes the last character in the manipulated -% string, and what started as the last character becomes the -% first character. -% Default mode is |[v]|. -% -% The command |\convertchar| \DescribeMacro{\convertchar} is a substitution -% command in which a specified match character in the original string -% ({\it from-char}) is substituted with a different string ({\it -% to-string}). All occurances of {\it from-char} in the original -% string are replaced. The {\it from-char} can only be a single -% character (or tokenized symbol), whereas {\it to-string} can range -% from the null-string (\ie character removal) to a single character -% (\ie character substitution) -% to a complete multi-character string. -% Default mode is |[v]|. -% -% The command |\convertword| \DescribeMacro{\convertword} is a substitution -% command in which a specified match string in the original string -% ({\it from-string}) is substituted with a different string ({\it -% to-string}). All occurances of {\it from-string} in the original -% string are replaced. If {\it from-string} includes spaces, use -% hard-space |(~)| characters instead of blanks. -% Default mode is |[v]|. -% -% The command |\rotateword| \DescribeMacro{\rotateword} takes the first -% word of {\it string} (and its leading and trailing spaces) -% and rotates them to the end of the string. -% Care must be taken to have a blankspace at the beginning or end -% of {\it string} if one wishes to retain a blankspace word -% separator between the original last word of the string and the -% original first word which has been rotated to the end of the string. -% Default mode is |[v]|. -% -% The command |\removeword| \DescribeMacro{\removeword} removes the -% first word of {\it string}, along with any of its leading and trailing -% spaces. -% Default mode is |[v]|. -% -% The command |\getnextword| \DescribeMacro{\getnextword} returns the -% next word of {\it string}. In this case, ``word'' is a sequence of -% characters delimited either by spaces or by the beginning or end -% of the string. -% Default mode is |[v]|. -% -% The command |\getaword| \DescribeMacro{\getaword} returns a -% word of {\it string} defined by the index, {\it n}. -% In this case, ``word'' is a sequence of -% characters delimited either by spaces or by the first or last -% characters of the string. If the index, {\it n}, requested exceeds the -% number of words available in the string, the index wraps around back -% to the first argument of the string, such that asking for the tenth word -% of an eight word string will return the second word of the string. -% Default mode is |[v]|. -% -% The command |\rotateleadingspaces| -% \DescribeMacro{\rotateleadingspaces} takes any leading spaces of the -% string and rotates them to the end of the string. -% Default mode is |[v]|. -% -% The command |\removeleadingspaces| -% \DescribeMacro{\removeleadingspaces} removes any leading spaces of the -% string. -% Default mode is |[v]|. -% -% The command |\stringencode| \DescribeMacro{\stringencode} returns a -% copy of the string that has been encoded according to the -% \stringstrings encoding scheme. Because an encoded string is an -% intermediate result, the default mode for this command is |[e]|. -% -% The command |\stringdecode| \DescribeMacro{\stringdecode} returns a -% copy of the string that has been decoded. -% Default mode is |[v]|. -% -% The command |\gobblechar| \DescribeMacro{\gobblechar} returns a string -% in which the first character of {\it string} has been removed. Unlike -% the \LaTeX{} system command |\@gobble| which removes the next {\bf -% byte} in -% the input stream, |\gobblechar| not only takes an argument as the -% target of its gobble, but also removes one {\bf character}, regardless -% of whether that character is a single-byte or multi-byte character. -% Because this command may have utility outside of the \stringstrings -% environment, the result of this command is retokenized (\ie |def|'ed) -% rather than expanded (\ie |edef|'ed). -% Default mode is |[q]|. Mode |[e]| is not recognized. -% -% The command |\gobblechars| \DescribeMacro{\gobblechars} returns a string -% in which the first {\it n} characters of {\it string} have been removed. -% Like |\gobblechar|, |\gobblechars| removes characters, regardless -% of whether those characters are single-byte or multi-byte characters. -% Likewise, the result of this command is retokenized (\ie |def|'ed) -% rather than expanded (\ie |edef|'ed). -% Default mode is |[q]|. Mode |[e]| is not recognized. -% -% The command |\retokenize| \DescribeMacro{\retokenize} takes a string -% that is encoded according to the \stringstrings encoding scheme, and -% repopulates the encoded characters with their \LaTeX{} tokens. This -% command is particularly useful for exporting a string to a routine -% outside of the \stringstrings library or if the string includes -% the following -% characters: |\{|, |\}|, \verb,\|,, |\dag|, |\ddag|, |\d|, |\t|, |\b|, -% |\copyright|, and |\P|. -% Default mode is |[q]|. Mode |[e]| is not recognized. -% -% \section {Commands to Extract String Information} -% -% These commands -% take an input string or token, and ascertain a particular -% characteristic of the string. They include: -% -% \noindent|\stringlength[|{\it mode}|]{|{\it string}|}|\\ -% |\findchars[|{\it mode}|]{|{\it string}|}{|{\it match-char}|}|\\ -% |\findwords[|{\it mode}|]{|{\it string}|}{|{\it match-string}|}|\\ -% |\whereischar[|{\it mode}|]{|{\it string}|}{|{\it match-char}|}|\\ -% |\whereisword[|{\it mode}|]{|{\it string}|}{|{\it match-string}|}|\\ -% |\wordcount[|{\it mode}|]{|{\it string}|}|\\ -% |\getargs[|{\it mode}|]{|{\it string}|}| -% -% \noindent Commands in this section return their result in the string -% |\theresult|, unless otherwise specified. -% Unless otherwise noted, the {\it mode} may take one of two values: -% |[v]| for verbose mode (generally, the default), and |[q]| for quiet -% mode. In both cases, the result of -% the operation is stored in |\theresult|. In verbose mode, it is also -% output immediately (and may be captured by an |\edef|). In quiet mode, -% no string is output, though the result still resides in |\theresult|. -% -% The command |\stringlength| \DescribeMacro{\stringlength} returns the -% length of {\it string} in characters (not bytes). -% Default mode is |[v]|. -% -% The command |\findchars| \DescribeMacro{\findchars} checks to see if -% the character {\it match-char} occurs anywhere in {\it string}. The -% number of occurances is stored in |\theresult| and, if in verbose -% mode, printed. If it is desired to find blankspaces, {\it match-char} -% should be set to |{~}| and not |{ }|. -% Default mode is |[v]|. -% -% The command |\findwords| \DescribeMacro{\findwords} checks to see if -% the string {\it match-string} occurs anywhere in {\it string}. The -% number of occurances is stored in |\theresult| and, if in verbose -% mode, printed. If it is desired to find blankspaces, those -% characters in {\it match-string} -% should be set to hardspaces (\ie tildes) and not softspaces (\ie -% blanks), regardless of how they are defined in {\it string}. -% Default mode is |[v]|. -% -% The command |\whereischar| \DescribeMacro{\whereischar} checks to see -% where -% the character {\it match-char} first occurs in {\it string}. The -% location of that occurance is stored in |\theresult| and, if in verbose -% mode, printed. If the character is not found, |\theresult| is set to -% a value of 0. If it is desired to find blankspaces, {\it match-char} -% should be set to |{~}| and not |{ }|. -% Default mode is |[v]|. -% -% The command |\whereisword| \DescribeMacro{\whereisword} checks to see -% where -% the string {\it match-string} first occurs in {\it string}. The -% location of that occurance is stored in |\theresult| and, if in verbose -% mode, printed. If {\it match-string} is not found, |\theresult| is set to -% a value of 0. If it is desired to find blankspaces, those characters -% in {\it match-string} -% should be set to hardspaces (\ie tildes) and not softspaces (\ie -% blanks), regardless of how they are defined in {\it string}. -% Default mode is |[v]|. -% -% The command |\wordcount| \DescribeMacro{\wordcount} counts the number -% of space-separated words that occur in {\it string}. -% Default mode is |[v]|. -% -% The command |\getargs| \DescribeMacro{\getargs} mimics the Unix -% command of the same name, in that it parses {\it string} to determine -% how many arguments (\ie words) are in {\it string}, and extracts -% each word into a separate variable. The number of arguments is placed -% in |\narg| and the individual arguments are placed in variables of -% the name |\argi|, |\argii|, |\argiii|, |\argiv|, etc. This command -% may be used to facilitate simply the use of multiple optional -% arguments in a \LaTeX{} command, for example -% |\mycommand[|{\it option1 option2 option3}|]{|{\it argument}|}|. -% In this case, -% |\mycommand| should exercise |\getargs{#1}|, with the result being -% that {\it option1} is stored in |\argi|, \etc~The command |\mycommand| -% may then proceed to parse the optional arguments and branch -% accordingly. -% Default mode is |[q]|; |[e]| mode is permitted, while |[v]| mode -% is disabled. -% -% \section {Commands to Test Strings} -% -% These commands take an input -% string or token and test for a particular alphanumeric condition. -% They include: -% -% \noindent% -% |\isnextbyte[|{\it mode}|]{|{\it match-byte}|}{|{\it string}|}|\\ -% |\testmatchingchar{|{\it -% string}|}{|{\it n}|}{|{\it match-char}|}|\\ -% |\testcapitalized{|{\it string}|}|\\ -% |\testuncapitalized{|{\it string}|}|\\ -% |\testleadingalpha{|{\it string}|}|\\ -% |\testuppercase{|{\it string}|}|\\ -% |\testsolelyuppercase{|{\it string}|}|\\ -% |\testlowercase{|{\it string}|}|\\ -% |\testsolelylowercase{|{\it string}|}|\\ -% |\testalphabetic{|{\it string}|}| -% -% The command |\isnextbyte| \DescribeMacro{\isnextbyte} tests to see if -% the first byte of {\it string} equals {\it match-byte}. It -% is the only string-testing command in -% this section which does not use the {\sf ifthen} test structure for -% its result. Rather, |\isnextbyte| returns the result of its test as -% a |T| or |F| in the string |\theresult|. More importantly, and -% unlike other \stringstrings commands, |\isnextbyte| is a {\it byte} test -% and not a {\it character} test. This means that, while |\isnextbyte| -% operates very efficiently, it cannot -% be used to directly detect multi-byte characters like |\$|, -% |\^|, |\{|, |\}|, |\_|, |\dag|, |\ddag|, |\AE|, |\ae|, |\OE|, -% |\oe|, \etc~(|\isnextbyte| will give false positives or negatives -% when testing for these multi-byte characters). -% The default mode of |\isnextbyte| is |[v]|. -% -% If a character needs to be tested, rather than a byte, -% \DescribeMacro{\testmatchingchar} |\testmatchingchar| should be used. -% The command |\testmatchingchar| is -% used to ascertain whether character {\it n} of {\it string} equals -% {\it match-char} or not. Whereas |\isnextbyte| checks only a {\it -% byte}, |\testmatchingchar| tests for a {\it character} (single- or -% multi-byte character). After the test is called, the action(s) may be -% called out with |\ifmatchingchar| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testcapitalized| \DescribeMacro{\testcapitalized} is -% used to ascertain whether the first character of {\it string} is -% capitalized or not. If the first character is non-alphabetic, the -% test will return FALSE. After the test is called, the action(s) may be -% called out with |\ifcapitalized| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testuncapitalized| \DescribeMacro{\testuncapitalized} is -% used to ascertain whether the first character of {\it string} is -% uncapitalized. If the first character is non-alphabetic, the -% test will return FALSE. After the test is called, the action(s) may be -% called out with |\ifuncapitalized| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testleadingalpha| \DescribeMacro{\testleadingalpha} is -% used to ascertain whether the first character of {\it string} is -% alphabetic. After the test is called, the action(s) may be -% called out with |\ifleadingalpha| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testuppercase| \DescribeMacro{\testuppercase} is -% used to ascertain whether all the alphabetic characters in {\it -% string} are uppercase or not. The presence of non-alphabetic -% characters in {\it string} does not falsify the test, -% but are merely ignored. However, a string completely void of -% alphabetic characters will always test FALSE. -% After the test is called, the action(s) may be -% called out with |\ifuppercase| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testsolelyuppercase| -% \DescribeMacro{\testsolelyuppercase} is -% used to ascertain whether {\it all} the characters in {\it -% string} are uppercase or not. The presence of non-alphabetic -% characters in {\it string} other than blankspaces will automatically -% falsify the test. Blankspaces are ignored. However, a null string or -% a string composed solely of blankspaces will also test FALSE. -% After the test is called, the action(s) may be -% called out with |\ifsolelyuppercase| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testlowercase| \DescribeMacro{\testlowercase} is -% used to ascertain whether all the alphabetic characters in {\it -% string} are lowercase or not. The presence of non-alphabetic -% characters in {\it string} does not falsify the test, -% but are merely ignored. However, a string completely void of -% alphabetic characters will always test FALSE. -% After the test is called, the action(s) may be -% called out with |\iflowercase| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testsolelylowercase| -% \DescribeMacro{\testsolelylowercase} is -% used to ascertain whether {\it all} the characters in {\it -% string} are lowercase or not. The presence of non-alphabetic -% characters in {\it string} other than blankspaces will automatically -% falsify the test. Blankspaces are ignored. However, a null string or -% a string composed solely of blankspaces will also test FALSE. -% After the test is called, the action(s) may be -% called out with |\ifsolelylowercase| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% The command |\testalphabetic| -% \DescribeMacro{\testalphabetic} is -% used to ascertain whether {\it all} the characters in {\it -% string} are alphabetic or not. The presence of non-alphabetic -% characters in {\it string} other than blankspaces will automatically -% falsify the test. Blankspaces are ignored. However, a null string or -% a string composed solely of blankspaces will also test FALSE. -% After the test is called, the action(s) may be -% called out with |\ifalphabetic| {\it true-code} |\else| {\it -% false-code} |\fi|. -% -% \section{Disclaimers} -% -% Now that we have described the commands available in the -% \stringstrings package, it is appropriate to lay out the quirks and -% warnings associated with the use of the package. -% -% First, \stringstrings is currently set to handle a string no larger -% than 500 characters. A user could circumvent this, presumably, by -% editing the style package to increase the value of -% |\@MAXSTRINGSIZE| \DescribeMacro{\@MAXSTRINGSIZE}. -% -% It is important to remember that \stringstrings follows the underlying -% rules of \LaTeX{}. Therefore, a passed string could not contain a raw -% |%| as part of it, because it would, in fact, comment out the -% remainder of the line. Naturally, the string may freely contain -% instances of |\%|. -% -% Tokens that take two or more characters to express -% (\eg |\#|, |\oe|, |\ddag|, \etc) are {\bf counted as -% a single character} within the string. -% The rule applies if you wanted to know the length -% of a string that was populated with such tokens, or wanted to extract -% a substring from a such a string. Of course, the exception that makes -% the rule is that of diacritical marks, which count as separate symbols -% from the characters they mark. For example, -% |\^a| counts as two characters, because the |a| is -% really just the operand of the |\^| token, even though the net result -% looks like a single character (\^a). -% -% Consistent with -% \LaTeX{} convention, groups of spaces are treated as a single -% blankspace, unless encoded with |~| characters. And finally, again -% consistent with the way \LaTeX{} operates, the space -% that follows an alphabetic token is not actually a space in the -% string, but serves as the delimiter to the token. Therefore, -% |\OE dipus| (\OE dipus) has a length of six characters, -% one for the |\OE| and five -% for the |dipus|. The intervening space merely closes out the |\OE| -% token, and does not represent a space in the middle of the string. -% -% One quirk worthy of particular note concerns the tabbing character, -% meaning \& -% as opposed to |\&| (which is handled without problem). -% As of version 1.01, \stringstrings has the -% capability to operate on arguments containg the ampersand \&, -% normally reserved as the \LaTeX{} tabbing character. However, one -% adverse by-product is that \& characters returned in |\thestring| -% lose their catcode-4 value, and thus lose their ability to function as -% tabbing characters. In the following example,\\ -% | |\\ -% | \caseupper[q]{a & b & c & d}|\\ -% | \begin{tabular}{|\verb,|l|c|c|c|,|}|\\ -% | \hline|\\ -% | \thestring\\|\\ -% | \hline|\\ -% | \end{tabular}|\\ -% | |\\ -% will produce \caseupper[q]{a & b & c & d} -% \begin{tabular}{\modetablelayout} -% \hline -% \thestring\\ -% \hline -% \end{tabular} -% instead of the desired -% \begin{tabular}{\modetablelayout} -% \hline -% A & B & C & D\\ -% \hline -% \end{tabular} -% . -% -% In the |\substring| command, no tests are performed to guarantee that -% the lower limit, {\it min}, is less than the upper limit, {\it max}, -% or that {\it min} is even positive. However, the upper limit, -% {\it max}, is corrected, if set larger than the string length. Also, -% the use of the `\$' symbol to signify the last character of the string -% and `\$--{\it n}' to denote an offset of {\it n} characters from the -% end of the string can be helpful in avoiding the misindexing of strings. -% -% \begin{table}[p] -% \caption{\bf Problematic Characters/Tokens and \stringstrings Solutions% -% \label{tbl:prob}}\vspace{.5em} -% \small -% \begin{tabular}{\mylayout} -% \LaTeX{} & Symbol/Name & Problem/Solution\\ -% \hline -% \hline -% |{| & begin group & Cannot use |{| and |}| in \stringstrings -% arguments.\\ -% |}| & end group & However, use |\LB|\ldots|\RB| in lieu of |{|\ldots|}|;\\ -% & & manipulate string in |[e]| mode \& |\retokenize| \\ -% \hline -% |\dag| & \dag~~Dagger & Cannot |\edef| these tokens; Thus, |[v]| mode\\ -% |\ddag| & \ddag~~Double Dagger & fails with both OT1 and T1 encoding; \\ -% |\P| & \P~~Pilcrow & manipulate string in |[e]| mode \& |\retokenize| \\ -% |\d| & \d x~~Underdot & \\ -% |\t| & \t xx~~Joining Arch & \\ -% |\b| & \b x~~Letter Underline & \\ -% |\copyright| & \copyright~Copyright & \\ -% \hline -% \hline -% |\_| & \_~~Underscore & Cannot |\edef| with OT1 encoding; either\\ -% |\{| & \{~~Left Curly Brace & |\renewcommand\encodingdefault{T1}|, or \\ -% |\}| & \}~~Right Curly Brace & -% manipulate string in |[e]| mode \& |\retokenize|. \\ -% |\S| & \S~~Section Symbol & With OT1, |\S|, |\c| and |\pounds| break\\ -% |\c| & \c x~~Cedilla & \stringstrings |[v]| mode.\\ -% |\pounds| & \pounds~~Pounds & \\ -% \hline -% \verb,\|,& \stringstrings Pipe Char. & Distinct from \verb,|,, -% the \stringstrings encoded-\\ -% & \verb,|, (T1) ~~~\stringdecode{\|} (OT1) & escape character\\ -% \hline -% \hline -% |\$| & \$~~Dollar & Either cannot |\edef|, or\\ -% |\carat| & \mycarat~~(text mode) & -% cannot identify uniquely with |\if| construct, or \\ -% |\^| & \^x~~Circumflex & expanded character is more than one byte. \\ -% |\'| & \'x~~Acute & \\ -% |\"| & \"x~~Umlaut & {\it However},\\ -% |\~| & \~x~~Tilde & -% Use these characters freely, \stringstrings\\ -% |\`| & \`x~~Grave & -% encoding functions transparently with them.\\ -% |\.| & \.x~~Overdot & \\ -% |\=| & \=x~~Macron & |\retokenize| also works\\ -% |\u| & \u x~~Breve & \\ -% |\v| & \v x~~Caron & \\ -% |\H| & \H x~~Double Acute & \\ -% |\ss| & \ss~~Eszett & \\ -% |\AE \ae| & \AE~\ae~~\ae sc & \\ -% |\OE \oe| & \OE~\oe~~\oe thel & \\ -% |\AA \aa| & \AA~\aa~~angstrom & \\ -% |\O \o| & \O~\o~~slashed O & \\ -% |\L \l| & \L~\l~~barred L & \\ -% |~| & Hardspace &\\ -% \hline -% |$| & begin/end math mode & These characters pose no difficulties;\\ -% |^| & math superscript & However, cannot extract substring that \\ -% |_| & math subscript & breaks in middle of math mode.\\ -% & & Other math mode symbols NOT supported.\\ -% \hline -% \& & ampersand & Version 1.01 \stringstrings can manipulate the\\ -% & & ampersand. However, returned strings\\ -% & & containing the \& character lose their\\ -% & & catcode-4 status, making them unfit\\ -% & & for use as tabbing characters.\\ -% \hline -% \hline -% \end{tabular} -% \end{table} -% Table~\ref{tbl:prob} shows a variety of characters and tokens, some of -% which pose a challenge to \stringstrings manipulations. In all cases, -% a solution or workaround is provided. For symbols in the top two -% categories, the workaround -% solution includes the use of retokenized strings instead of expanded -% strings. For symbols in the next two categories, use of T1 encoding -% or retokenizing provides a satisfactory solution. In the bottom three -% categories, because of \stringstrings encoded |[e]| mode, -% there is nothing to impede the use of these characters in -% \stringstrings arguments, if encoded |[e]| mode is employed for -% intermediate calculations. Some of the -% details of these problematic cases is described below. -% -% Not surprisingly, you are not allowed to extract a substring of a -% string, if it breaks in the middle of math mode, because a substring -% with only one |$| in it cannot be |\edef|'ed. -% -% There are a few potential quirks when using \LaTeX{}'s native OT1 -% character encoding, most of which can be circumvented by using the -% more modern -% T1 encoding (accessed via |\renewcommand\encodingdefault{T1}| in the -% document preamble). The quirks arise because there are -% several characters that, while displayable in \LaTeX{}, are not part -% of the OT1 character encoding. The characters include |\{|, |\}|, and -% the \verb,|, symbol (accessed in \stringstrings via \verb,\|,). -% When using \stringstrings to manipulate strings containing -% these characters in the presence of OT1 encoding, -% they come out looking like \stringdecode{\{}, \stringdecode{\}}, -% and \stringdecode{\|}, respectively. However, if the T1 encoding fix -% is not an option for you, you can also work around this problem by -% |\retokenize|'ing the affected string (the |\retokenize| command is -% provided to convert encoded, expanded strings back into tokenized -% form, if need be). -% -% Likewise, for both OT1 and T1 encoding, the characters \dag~(|\dag|), -% \ddag~(|\ddag|), \P~(|\P|), \d~~(|\d|), \t~~~(|\t|), \b~~~(|\b|), -% and \copyright~(|\copyright|) -% cannot be in the argument of an |\edef| expression. For -% manipulated strings including these characters, |\retokenize| is the -% only option available to retain the integrity of the string. -% -% As discussed thoroughly in the previous section, an ``encoded'' form of -% the string manipulation routines is provided to prevent the -% undesirable circumstance of passing an |\edef|'ed symbol as input -% to a subsequent manipulation. Likewise, never try to ``decode'' -% an already ``decoded'' string. -% -% When \stringstrings doesn't understand a token, it is supposed to -% replace it with a period. However, some undecipherable characters may -% inadvertantly be replaced with a space, instead. Of course, neither -% of these possibilities is any comfort to the user. -% -% As mentioned already, \stringstrings cannot handle curly braces that -% are used for grouping purposes, a circumstance which often arises in -% math mode. Nonetheless, |\LB| and |\RB| may be used within -% \stringstrings arguments in lieu of grouping braces, {\it if the final -% result is to be retokenized}. Thus, |\caselower[e]{$X^\LB Y + Z\RB$}| -% followed by |\convertchar[e]{\thestring}{x}{(1+x)}|, when finished up -% with the following command, -% |\retokenize[v]{\thestring}| yields as its result:\\ -% \caselower[e]{$X^\LB Y + Z\RB$}\convertchar[e]{\thestring}{x}{(1+x)} -% \retokenize[v]{\thestring}. -% -% One might ask, ``why not retokenize everything, instead of using the -% |[v]| mode of the \stringstrings routines?'' While one {\it could} -% do this, the answer is simply -% that |\retokenize| is a computationally intensive command, and that -% it is best used, therefore, only when the more efficient methods -% will not suffice. In many, if not most cases, strings to be -% manipulated will be solely composed of alphanumeric characters which -% don't require the use of |\retokenize|, T1 encoding, or even -% \stringstrings encoding. -% -% Despite these several disclaimers and workarounds required when -% dealing with problematic characters, I hope you find the \stringstrings -% architecture and feel to be straightforward and useful. There is only -% one thing left, and that is to dissect the code\ldots and so here we -% go. -% -%% \CharacterTable -%% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z -%% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z -%% Digits \0\1\2\3\4\5\6\7\8\9 -%% Exclamation \! Double quote \" Hash (number) \# -%% Dollar \$ Percent \% Ampersand \& -%% Acute accent \' Left paren \( Right paren \) -%% Asterisk \* Plus \+ Comma \, -%% Minus \- Point \. Solidus \/ -%% Colon \: Semicolon \; Less than \< -%% Equals \= Greater than \> Question mark \? -%% Commercial at \@ Left bracket \[ Backslash \\ -%% Right bracket \] Circumflex \^ Underscore \_ -%% Grave accent \` Left brace \{ Vertical bar \| -%% Right brace \} Tilde \~} -% \StopEventually{} -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% \vspace{-0.8em} -% \begin{macro}{stringstrings.sty} -% \section{Code Listing} -% I'll try to lay out herein -% the workings of the \stringstrings style package. -% \begin{macrocode} -%<*package> - -%%%%% INITIALIZATIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -\catcode`\&=12 -% \end{macrocode} -% \end{macro} -% -% \begin{macro}{ifthen} -% This package makes wide use of the {\sf ifthen} style package. -% \begin{macrocode} -\usepackage{ifthen} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@MAXSTRINGSIZE} -% The parameter |\@MAXSTRINGSIZE| defines the maximum allowable string -% size that \stringstrings can operate upon. -% \begin{macrocode} -\def\@MAXSTRINGSIZE{500} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -\def\endofstring{@E@o@S@}% -\def\undecipherable{.}% UNDECIPHERABLE TOKENS TO BE REPLACED BY PERIOD -\def\@blankaction{\BlankSpace} -% \end{macrocode} -% Save the symbols which will get redefined \stringstrings encoding. - -% \begin{macrocode} -\let\SaveDollar\$ -\let\SaveHardspace~ -\let\SaveCircumflex\^ -\let\SaveTilde\~ -\let\SaveUmlaut\" -\let\SaveGrave\` -\let\SaveAcute\' -\let\SaveMacron\= -\let\SaveOverdot\. -\let\SaveBreve\u -\let\SaveCaron\v -\let\SaveDoubleAcute\H -\let\SaveCedilla\c -\let\SaveUnderdot\d -\let\SaveArchJoin\t -\let\SaveLineUnder\b -\let\SaveCopyright\copyright -\let\SavePounds\pounds -\let\SaveLeftBrace\{ -\let\SaveRightBrace\} -\let\SaveUnderscore\_ -\let\SaveDagger\dag -\let\SaveDoubleDagger\ddag -\let\SaveSectionSymbol\S -\let\SavePilcrow\P -\let\SaveAEsc\AE -\let\Saveaesc\ae -\let\SaveOEthel\OE -\let\Saveoethel\oe -\let\SaveAngstrom\AA -\let\Saveangstrom\aa -\let\SaveSlashedO\O -\let\SaveSlashedo\o -\let\SaveBarredL\L -\let\SaveBarredl\l -\let\SaveEszett\ss -\let\SaveLB{ -\let\SaveRB} -% \end{macrocode} - -% The BlankSpace character is the only character which is reencoded -% with a 1-byte re-encoding\ldots in this case the \OE~character. -% \begin{macrocode} -\def\EncodedBlankSpace{\SaveOEthel} -\edef\BlankSpace{ } -% \end{macrocode} -% All other reencoded symbols consist of 2 bytes: an escape character -% plus a unique code. The escape character is a pipe symbol. the -% unique code comprises either a single number, letter, or symbol. - -% \begin{macrocode} -\def\EscapeChar{|} - -% |0 IS AN ENCODED |, ACCESSED VIA \| -\def\PipeCode{0} -\def\EncodedPipe{\EscapeChar\PipeCode} -\def\Pipe{|} -\let\|\EncodedPipe - -% |1 IS AN ENCODED \$ -\def\DollarCode{1} -\def\EncodedDollar{\EscapeChar\DollarCode} -% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING; -% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING -\def\Dollar{\symbol{36}} -% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING -%\def\Dollar{\SaveDollar} - -% |W IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN -\def\UvariCode{W} -\def\EncodedUvari{\EscapeChar\UvariCode} -\def\Uvari{Uvari} -\let\uvari\EncodedUvari - -% |X IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN -\def\UvariiCode{X} -\def\EncodedUvarii{\EscapeChar\UvariiCode} -\def\Uvarii{Uvarii} -\let\uvarii\EncodedUvarii - -% |Y IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN -\def\UvariiiCode{Y} -\def\EncodedUvariii{\EscapeChar\UvariiiCode} -\def\Uvariii{Uvariii} -\let\uvariii\EncodedUvariii - -% |2 IS AN ENCODED ^ FOR USE IN TEXT MODE, ACCESSED VIA \carat -\def\CaratCode{2} -\def\EncodedCarat{\EscapeChar\CaratCode} -\def\Carat{\symbol{94}} -\let\carat\EncodedCarat - -% |4 IS AN ENCODED \{ -\def\LeftBraceCode{4} -\def\EncodedLeftBrace{\EscapeChar\LeftBraceCode} -% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING; -% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING -\def\LeftBrace{\symbol{123}} -% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING -%\def\LeftBrace{\SaveLeftBrace} - -% |5 IS AN ENCODED \} -\def\RightBraceCode{5} -\def\EncodedRightBrace{\EscapeChar\RightBraceCode} -% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING; -% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING -\def\RightBrace{\symbol{125}} -% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING -%\def\RightBrace{\SaveRightBrace} - -% |6 IS AN ENCODED \_ -\def\UnderscoreCode{6} -\def\EncodedUnderscore{\EscapeChar\UnderscoreCode} -\def\Underscore{\symbol{95}} -%\def\Underscore{\SaveUnderscore} - -% |7 IS AN ENCODED \^ -\def\CircumflexCode{7} -\def\EncodedCircumflex{\EscapeChar\CircumflexCode} -\def\Circumflex{\noexpand\SaveCircumflex} - -% |8 IS AN ENCODED \~ -\def\TildeCode{8} -\def\EncodedTilde{\EscapeChar\TildeCode} -\def\Tilde{\noexpand\SaveTilde} - -% |" IS AN ENCODED \" -\def\UmlautCode{"} -\def\EncodedUmlaut{\EscapeChar\UmlautCode} -\def\Umlaut{\noexpand\SaveUmlaut} - -% |` IS AN ENCODED \` -\def\GraveCode{`} -\def\EncodedGrave{\EscapeChar\GraveCode} -\def\Grave{\noexpand\SaveGrave} - -% |' IS AN ENCODED \' -\def\AcuteCode{'} -\def\EncodedAcute{\EscapeChar\AcuteCode} -\def\Acute{\noexpand\SaveAcute} - -% |= IS AN ENCODED \= -\def\MacronCode{=} -\def\EncodedMacron{\EscapeChar\MacronCode} -\def\Macron{\noexpand\SaveMacron} - -% |. IS AN ENCODED \. -\def\OverdotCode{.} -\def\EncodedOverdot{\EscapeChar\OverdotCode} -\def\Overdot{\noexpand\SaveOverdot} - -% |u IS AN ENCODED \u -\def\BreveCode{u} -\def\EncodedBreve{\EscapeChar\BreveCode} -\def\Breve{\noexpand\SaveBreve} - -% |v IS AN ENCODED \v -\def\CaronCode{v} -\def\EncodedCaron{\EscapeChar\CaronCode} -\def\Caron{\noexpand\SaveCaron} - -% |H IS AN ENCODED \H -\def\DoubleAcuteCode{H} -\def\EncodedDoubleAcute{\EscapeChar\DoubleAcuteCode} -\def\DoubleAcute{\noexpand\SaveDoubleAcute} - -% |c IS AN ENCODED \c -\def\CedillaCode{c} -\def\EncodedCedilla{\EscapeChar\CedillaCode} -\def\Cedilla{\noexpand\SaveCedilla} - -% |d IS AN ENCODED \d -\def\UnderdotCode{d} -\def\EncodedUnderdot{\EscapeChar\UnderdotCode} -\def\Underdot{.}% CANNOT \edef \d - -% |t IS AN ENCODED \t -\def\ArchJoinCode{t} -\def\EncodedArchJoin{\EscapeChar\ArchJoinCode} -\def\ArchJoin{.}% CANNOT \edef \t - -% |b IS AN ENCODED \b -\def\LineUnderCode{b} -\def\EncodedLineUnder{\EscapeChar\LineUnderCode} -\def\LineUnder{.}% CANNOT \edef \b - -% |C IS AN ENCODED \copyright -\def\CopyrightCode{C} -\def\EncodedCopyright{\EscapeChar\CopyrightCode} -\def\Copyright{.}% CANNOT \edef \copyright - -% |p IS AN ENCODED \pounds -\def\PoundsCode{p} -\def\EncodedPounds{\EscapeChar\PoundsCode} -\def\Pounds{\SavePounds} - -% |[ IS AN ENCODED { -\def\LBCode{[} -\def\EncodedLB{\EscapeChar\LBCode} -\def\UnencodedLB{.} -\def\LB{\EncodedLB} - -% |] IS AN ENCODED } -\def\RBCode{]} -\def\EncodedRB{\EscapeChar\RBCode} -\def\UnencodedRB{.} -\def\RB{\EncodedRB} - -% |z IS AN ENCODED \dag -\def\DaggerCode{z} -\def\EncodedDagger{\EscapeChar\DaggerCode} -\def\Dagger{.}% CANNOT \edef \dag - -% |Z IS AN ENCODED \ddag -\def\DoubleDaggerCode{Z} -\def\EncodedDoubleDagger{\EscapeChar\DoubleDaggerCode} -\def\DoubleDagger{.}% CANNOT \edef \ddag - -% |S IS AN ENCODED \S -\def\SectionSymbolCode{S} -\def\EncodedSectionSymbol{\EscapeChar\SectionSymbolCode} -\def\SectionSymbol{\SaveSectionSymbol} - -% |P IS AN ENCODED \P -\def\PilcrowCode{P} -\def\EncodedPilcrow{\EscapeChar\PilcrowCode} -\def\Pilcrow{.}% CANNOT \edef \P - -% |E IS AN ENCODED \AE -\def\AEscCode{E} -\def\EncodedAEsc{\EscapeChar\AEscCode} -\def\AEsc{\SaveAEsc} - -% |e IS AN ENCODED \ae -\def\aescCode{e} -\def\Encodedaesc{\EscapeChar\aescCode} -\def\aesc{\Saveaesc} - -% |O IS AN ENCODED \OE -\def\OEthelCode{O} -\def\EncodedOEthel{\EscapeChar\OEthelCode} -\def\OEthel{\SaveOEthel} - -% |o IS AN ENCODED \oe -\def\oethelCode{o} -\def\Encodedoethel{\EscapeChar\oethelCode} -\def\oethel{\Saveoethel} - -% |A IS AN ENCODED \AA -\def\AngstromCode{A} -\def\EncodedAngstrom{\EscapeChar\AngstromCode} -\def\Angstrom{\SaveAngstrom} - -% |a IS AN ENCODED \aa -\def\angstromCode{a} -\def\Encodedangstrom{\EscapeChar\angstromCode} -\def\angstrom{\Saveangstrom} - -% |Q IS AN ENCODED \O -\def\SlashedOCode{Q} -\def\EncodedSlashedO{\EscapeChar\SlashedOCode} -\def\SlashedO{\SaveSlashedO} - -% |q IS AN ENCODED \o -\def\SlashedoCode{q} -\def\EncodedSlashedo{\EscapeChar\SlashedoCode} -\def\Slashedo{\SaveSlashedo} - -% |L IS AN ENCODED \L -\def\BarredLCode{L} -\def\EncodedBarredL{\EscapeChar\BarredLCode} -\def\BarredL{\SaveBarredL} - -% |l IS AN ENCODED \l -\def\BarredlCode{l} -\def\EncodedBarredl{\EscapeChar\BarredlCode} -\def\Barredl{\SaveBarredl} - -% |s IS AN ENCODED \ss -\def\EszettCode{s} -\def\EncodedEszett{\EscapeChar\EszettCode} -\def\Eszett{\SaveEszett} - -\newcounter{@letterindex} -\newcounter{@@letterindex} -\newcounter{@@@letterindex} -\newcounter{@wordindex} -\newcounter{@iargc} -\newcounter{@gobblesize} -\newcounter{@maxrotation} -\newcounter{@stringsize} -\newcounter{@@stringsize} -\newcounter{@@@stringsize} -\newcounter{@revisedstringsize} -\newcounter{@gobbleindex} -\newcounter{@charsfound} -\newcounter{@alph} -\newcounter{@alphaindex} -\newcounter{@capstrigger} -\newcounter{@fromindex} -\newcounter{@toindex} -\newcounter{@previousindex} -\newcounter{@flag} -\newcounter{@matchloc} -\newcounter{@matchend} -\newcounter{@matchsize} -\newcounter{@matchmax} -\newcounter{@skipped} -\newcounter{@lcwords} -% \end{macrocode} -% \begin{macrocode} -%%%%% CONFIGURATION COMMANDS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% \end{macrocode} - -% \begin{macro}{\defaultTreatments} -% This command can be used to restore the default string treatments, -% prior to calling |\substring|. The default treatments leave all -% symbol types intact and unaltered. -% \begin{macrocode} -\newcommand\defaultTreatments{% - \def\EncodingTreatment{v}% <--Set=v to decode special chars (vs. q,e) - \def\AlphaCapsTreatment{1}% <--Set=1 to retain uppercase (vs. 0,2) - \def\AlphaTreatment{1}% <--Set=1 to retain lowercase (vs. 0,2) - \def\PunctuationTreatment{1}% <--Set=1 to retain punctuation (vs. 0) - \def\NumeralTreatment{1}% <--Set=1 to retain numerals (vs. 0) - \def\SymbolTreatment{1}% <--Set=1 to retain special chars (vs. 0) - \def\BlankTreatment{1}% <--Set=1 to retain blanks (vs. 0) - \def\CapitalizeString{0}% <--Set=0 for no special action (vs. 1,2) - \def\SeekBlankSpace{0}% <--Set=0 for no special action (vs. 1,2) -} -\defaultTreatments -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\Treatments} -% This command allows the user to specify the desired character class -% treatments, prior to a call to |\substring|. Unfortunately for the -% user, I have specified which character class each symbol belongs to. -% Therefore, it is not easy if the user decides that he wants a cedilla, -% for example, to be treated like an alphabetic character rather than -% a symbol. -% \begin{macrocode} -% QUICK WAY TO SET UP TREATMENTS BY WHICH \@rotate HANDLES VARIOUS -% CHARACTERS -\newcommand\Treatments[6]{% - \def\AlphaCapsTreatment{#1}% <--Set=0 to remove uppercase -% =1 to retain uppercase -% =2 to change UC to lc - \def\AlphaTreatment{#2}% <--Set=0 to remove lowercase -% =1 to retain lowercase -% =2 to change lc to UC - \def\PunctuationTreatment{#3}%<--Set=0 to remove punctuation -% =1 to retain punctuation - \def\NumeralTreatment{#4}% <--Set=0 to remove numerals -% =1 to retain numerals - \def\SymbolTreatment{#5}% <--Set=0 to remove special chars -% =1 to retain special chars - \def\BlankTreatment{#6}% <--Set=0 to remove blanks -% =1 to retain blanks -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\+} -% This command (|\+|) is used to enact the \stringstrings encoding. -% Key symbols are redefined, and any |\edef| which occurs while this -% command is active will adopt these new definitions. -% \begin{macrocode} -% REENCODE MULTIBYTE SYMBOLS USING THE stringstrings ENCODING METHOD -\newcommand\+{% - \def\${\EncodedDollar}% - \def~{\EncodedBlankSpace}% - \def\^{\EncodedCircumflex}% - \def\~{\EncodedTilde}% - \def\"{\EncodedUmlaut}% - \def\`{\EncodedGrave}% - \def\'{\EncodedAcute}% - \def\={\EncodedMacron}% - \def\.{\EncodedOverdot}% - \def\u{\EncodedBreve}% - \def\v{\EncodedCaron}% - \def\H{\EncodedDoubleAcute}% - \def\c{\EncodedCedilla}% - \def\d{\EncodedUnderdot}% - \def\t{\EncodedArchJoin}% - \def\b{\EncodedLineUnder}% - \def\copyright{\EncodedCopyright}% - \def\pounds{\EncodedPounds}% - \def\{{\EncodedLeftBrace}% - \def\}{\EncodedRightBrace}% - \def\_{\EncodedUnderscore}% - \def\dag{\EncodedDagger}% - \def\ddag{\EncodedDoubleDagger}% - \def\S{\EncodedSectionSymbol}% - \def\P{\EncodedPilcrow}% - \def\AE{\EncodedAEsc}% - \def\ae{\Encodedaesc}% - \def\OE{\EncodedOEthel}% - \def\oe{\Encodedoethel}% - \def\AA{\EncodedAngstrom}% - \def\aa{\Encodedangstrom}% - \def\O{\EncodedSlashedO}% - \def\o{\EncodedSlashedo}% - \def\L{\EncodedBarredL}% - \def\l{\EncodedBarredl}% - \def\ss{\EncodedEszett}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\?} -% The command |\?| reverts the character encodings back to the standard -% \LaTeX{} definitions. The command effectively undoes a previously -% enacted |\+|. -% \begin{macrocode} -% WHEN TASK IS DONE, REVERT ENCODING TO STANDARD ENCODING METHOD -\newcommand\?{% - \let\$\SaveDollar% - \let~\SaveHardspace% - \let\^\SaveCircumflex% - \let\~\SaveTilde% - \let\"\SaveUmlaut% - \let\`\SaveGrave% - \let\'\SaveAcute% - \let\=\SaveMacron% - \let\.\SaveOverdot% - \let\u\SaveBreve% - \let\v\SaveCaron% - \let\H\SaveDoubleAcute% - \let\c\SaveCedilla% - \let\d\SaveUnderdot% - \let\t\SaveArchJoin% - \let\b\SaveLineUnder% - \let\copyright\SaveCopyright% - \let\pounds\SavePounds% - \let\{\SaveLeftBrace% - \let\}\SaveRightBrace% - \let\_\SaveUnderscore% - \let\dag\SaveDagger% - \let\ddag\SaveDoubleDagger% - \let\S\SaveSectionSymbol% - \let\P\SavePilcrow% - \let\AE\SaveAEsc% - \let\ae\Saveaesc% - \let\OE\SaveOEthel% - \let\oe\Saveoethel% - \let\AA\SaveAngstrom% - \let\aa\Saveangstrom% - \let\O\SaveSlashedO% - \let\o\SaveSlashedo% - \let\L\SaveBarredL% - \let\l\SaveBarredl% - \let\ss\SaveEszett% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\encodetoken} -% The command |\encodetoken| assigns the supplied token to one of three -% reserved \stringstrings user variables (the optional argument dictates -% which user variable). Once encoded, the supplied token cannot be used -% in the normal way, but only in stringstrings routines, unless and -% until it is decoded. -% \begin{macrocode} -\newcommand\encodetoken[2][1]{% - \if 1#1% - \let\Uvari#2% - \let#2\uvari\else - \if 2#1% - \let\Uvarii#2% - \let#2\uvarii\else - \if 3#1% - \let\Uvariii#2% - \let#2\uvariii% - \fi - \fi - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\decodetoken} -% The command |\decodetoken| deassigns the supplied token from the -% reserved \stringstrings user variables (the optional argument dictates -% which user variable), so that the token may be used in the normal way -% again. -% \begin{macrocode} -\newcommand\decodetoken[2][1]{% - \if 1#1% - \let#2\Uvari% - \def\Uvari{Uvari}\else - \if 2#1% - \let#2\Uvarii% - \def\Uvarii{Uvarii}\else - \if 3#1% - \let#2\Uvariii% - \def\Uvariii{Uvariii}% - \fi - \fi - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -%%%%% COMMANDS TO MANIPULATE STRINGS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% \end{macrocode} - -% In the next group of commands, the result is always stored in an -% expandable string, |\thestring|. Expandable means that |\thestring| can -% be put into a subsequent |\edef{}| command. Additionally, the -% optional first argument can be used to cause three actions (verbose, -% encoded, or quiet): -% \begin{enumerate} -% \item [|=v|] |\thestring| is decoded (final result); -% print it immediately (default) -% \item [|=e|] |\thestring| is encoded (intermediate result); -% don't print it -% \item [|=q|] |\thestring| is decoded (final result), -% but don't print it -% \end{enumerate} -% \begin{macro}{\substring} -% The command |\substring| is the brains of this package\ldots -% It is used to acquire a substring from a given string, along with -% performing specified character manipulations along the way. -% Its strategy is fundamental to the \stringstrings -% package: sequentially rotate the 1st character of the -% string to the end of the string, until the desired substring resides -% at end of rotated string. Then, gobble up the leading part of -% string until only the desired substring is left. -% \begin{macrocode} -\newcommand\substring[4][v]{\+% -% \end{macrocode} -% Obtain the string length of the string to be manipulated and store -% it in |@stringsize|. -% \begin{macrocode} - \@getstringlength{#2}{@stringsize}% -% \end{macrocode} -% First, -% |\@decodepointer| is used to convert indirect references like |$| -% and |$-3| into integers. -% \begin{macrocode} - \@decodepointer{#3}% - \setcounter{@fromindex}{\@fromtoindex}% - \@decodepointer{#4}% - \setcounter{@toindex}{\@fromtoindex}% -% \end{macrocode} -% Determine the number of characters to rotate to the end of the string -% and the number of characters to then gobble from it, in order to leave -% the desired substring. -% \begin{macrocode} - \setcounter{@gobblesize}{\value{@stringsize}}% - \ifthenelse{\value{@toindex} > \value{@stringsize}}% - {\setcounter{@maxrotation}{\value{@stringsize}}}% - {\setcounter{@maxrotation}{\value{@toindex}}}% - \addtocounter{@gobblesize}{-\value{@maxrotation}}% - \addtocounter{@gobblesize}{\value{@fromindex}}% - \addtocounter{@gobblesize}{-1}% -% \end{macrocode} -% Prepare for the string rotation by initializing counters, setting the -% targeted string into the working variable, |\rotatingword|, and set -% the encoding treatment specified. -% \begin{macrocode} - \setcounter{@letterindex}{0}% - \edef\rotatingword{#2}% - \def\EncodingTreatment{#1}% -% \end{macrocode} -% If capitalization (first character of string or of each word) -% was specified, the -% trigger for 1st-character capitalization will be set. However, -% the treatments for the alphabetic characters for the remainder of the -% string must be saved and reinstituted after the first character is -% capitalized. -% \begin{macrocode} - \if 0\CapitalizeString% -% DO NOT SET CAPITALIZE TRIGGER FOR FIRST CHARACTER - \setcounter{@capstrigger}{0}% - \else -% SAVE CERTAIN TREATMENTS FOR LATER RESTORATION - \let\SaveAlphaTreatment\AlphaTreatment% - \let\SaveAlphaCapsTreatment\AlphaCapsTreatment% -% SET CAPITALIZE TRIGGER FOR FIRST CHARACTER - \setcounter{@capstrigger}{1}% - \@forcecapson% - \fi -% \end{macrocode} -% The command |\@defineactions| looks at the defined treatments -% and specifies how each of the \stringstrings encoded -% characters should be handled (\ie left alone, removed, modified, -% \etc). -% \begin{macrocode} -\@defineactions% -% \end{macrocode} -% Here begins the primary loop of |\substring| in which characters of -% |\rotatingword| are successively moved (and possibly manipulated) -% from the first character of the string to the last. |@letterindex| is -% the running index defining how many characters have been operated on. -% \begin{macrocode} - \whiledo{\value{@letterindex} < \value{@maxrotation}}{% - \addtocounter{@letterindex}{1}% -% \end{macrocode} -% When |\CapitalizeString| equals 1, only the first character of the -% string is capitalized. When it equals 2, every word in the string -% is capitalized. When equal to 2, this bit of code looks for the -% blankspace that follows the end of a word, and uses it to reset the -% capitalization trigger for the next non-blank character. -% \begin{macrocode} -% IF NEXT CHARACTER BLANK WHILE \CapitalizeString=2, -% SET OR KEEP ALIVE TRIGGER. - \if 2\CapitalizeString% - \isnextbyte[q]{\EncodedBlankSpace}{\rotatingword}% - \if F\theresult\isnextbyte[q]{\BlankSpace}{\rotatingword}\fi% - \if T\theresult% - \if 0\arabic{@capstrigger}% - \@forcecapson% - \@defineactions% - \fi - \setcounter{@capstrigger}{2}% - \fi - \fi -% \end{macrocode} -% Is the next character an encoded symbol? If it is a normal character, -% simply rotate it to the end of the string. -% If it is an encoded symbol however, its -% treatment will depend on whether it will be gobbled away or end up -% in the final substring. If it will be gobbled away, leave it encoded, -% because the gobbling routine knows how to gobble encoded characters. -% If it will end up in the substring, manipulate it according to the -% encoding rules set in |\@defineactions| and rotate it. -% \begin{macrocode} -% CHECK IF NEXT CHARACTER IS A SYMBOL - \isnextbyte[q]{\EscapeChar}{\rotatingword}% - \ifthenelse{\value{@letterindex} < \value{@fromindex}}% - {% -% THIS CHARACTER WILL EVENTUALLY BE GOBBLED - \if T\theresult% -% ROTATE THE ESCAPE CHARACTER, WHICH WILL LEAVE THE SYMBOL ENCODED -% FOR PROPER GOBBLING (ESCAPE CHARACTER DOESN'T COUNT AS A LETTER) - \edef\rotatingword{\@rotate{\rotatingword}}% - \addtocounter{@letterindex}{-1}% - \else -% NORMAL CHARACTER OR SYMBOL CODE... ROTATE IT - \edef\rotatingword{\@rotate{\rotatingword}}% - \fi - }% - {% -% THIS CHARACTER WILL EVENTUALLY MAKE IT INTO SUBSTRING - \if T\theresult% -% ROTATE THE SYMBOL USING DEFINED TREATMENT RULES - \edef\rotatingword{\ESCrotate{\expandafter\@gobble\rotatingword}}% - \else -% NORMAL CHARACTER... ROTATE IT - \edef\rotatingword{\@rotate{\rotatingword}}% - \fi - }% -% \end{macrocode} -% Here, the capitalization trigger persistently tries to turn -% itself off with each loop -% through the string rotation. Only if the earlier code found the -% rotation to be pointing to the blank character(s) between words while -% |\CapitalizeString| equals 2 will the trigger be prevented from -% extinguishing itself. -% \begin{macrocode} -% DECREMENT CAPITALIZATION TRIGGER TOWARDS 0, EVERY TIME THROUGH LOOP - \if 0\arabic{@capstrigger}% - \else - \addtocounter{@capstrigger}{-1}% - \if 0\arabic{@capstrigger}\@relaxcapson\fi - \fi -% \end{macrocode} -% In addition to the standard |\substring| calls in which fixed -% substring limits are specified (which in turn fixes the number of -% character rotations to be executed), some \stringstrings commands -% want the rotations to continue until a blankspace is located. -% This bit of code looks for that blank space, if that was the option -% requested. Once found, the rotation will stop. However, depending -% on the value of |\SeekBlankSpace|, the remainder of the string may -% either be retained or discarded. -% \begin{macrocode} -% IF SOUGHT SPACE IS FOUND, END ROTATION OF STRING - \if 0\SeekBlankSpace\else - \isnextbyte[q]{\EncodedBlankSpace}{\rotatingword}% - \if F\theresult\isnextbyte[q]{\BlankSpace}{\rotatingword}\fi% - \if T\theresult% - \if 1\SeekBlankSpace% -% STOP ROTATION, KEEP REMAINDER OF STRING - \setcounter{@maxrotation}{\value{@letterindex}}% - \else -% STOP ROTATION, THROW AWAY REMAINDER OF STRING - \addtocounter{@gobblesize}{\value{@maxrotation}}% - \setcounter{@maxrotation}{\value{@letterindex}}% - \addtocounter{@gobblesize}{-\value{@maxrotation}}% - \fi - \fi - \fi - }% -% \end{macrocode} -% The loop has ended.\\ -% Gobble up the first |@gobblesize| characters (not bytes!)~of the string, -% which should leave the desired substring as the remainder. If the -% mode is verbose, print out the resulting substring. -% \begin{macrocode} -% GOBBLE AWAY THAT PART OF STRING THAT ISN'T PART OF REQUESTED SUBSTRING - \@gobblearg{\rotatingword}{\arabic{@gobblesize}}% - \edef\thestring{\gobbledword}% - \if v#1\thestring\fi% -\?} -% \end{macrocode} -% \end{macro} - -% Many of the following commands are self-expanatory. The recipe they -% follow is to use |\Treatments| to specify how different character -% classes are to be manipulated, and then to call upon |\substring| to -% effect the desired manipulation. Treatments are typically -% re-defaulted at the conclusion of the command, which is why the user, -% if desiring special treatments, should specify those treatments -% immediately before a call to |\substring|. -% \begin{macro}{\caseupper} -% \begin{macrocode} -% Convert Lower to Uppercase; retain all symbols, numerals, -% punctuation, and blanks. -\newcommand\caseupper[2][v]{% - \Treatments{1}{2}{1}{1}{1}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\caselower} -% \begin{macrocode} -% Convert Upper to Lowercase; retain all symbols, numerals, -% punctuation, and blanks. -\newcommand\caselower[2][v]{% - \Treatments{2}{1}{1}{1}{1}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\solelyuppercase} -% \begin{macrocode} -% Convert Lower to Uppercase; discard symbols, numerals, and -% punctuation, but keep blanks. -\newcommand\solelyuppercase[2][v]{% - \Treatments{1}{2}{0}{0}{0}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\solelylowercase} -% \begin{macrocode} -% Convert Upper to Lowercase; discard symbols, numerals, and -% punctuation, but keep blanks. -\newcommand\solelylowercase[2][v]{% - \Treatments{2}{1}{0}{0}{0}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\changecase} -% \begin{macrocode} -% Convert Lower to Uppercase & Upper to Lower; retain all symbols, numerals, -% punctuation, and blanks. -\newcommand\changecase[2][v]{% - \Treatments{2}{2}{1}{1}{1}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\noblanks} -% \begin{macrocode} -% Remove blanks; retain all else. -\newcommand\noblanks[2][v]{% - \Treatments{1}{1}{1}{1}{1}{0}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\nosymbolsnumerals} -% \begin{macrocode} -% Retain case; discard symbols & numerals; retain -% punctuation & blanks. -\newcommand\nosymbolsnumerals[2][v]{% - \Treatments{1}{1}{1}{0}{0}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\alphabetic} -% \begin{macrocode} -% Retain case; discard symbols, numerals & -% punctuation; retain blanks. -\newcommand\alphabetic[2][v]{% - \Treatments{1}{1}{0}{0}{0}{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\capitalize} -% The command |\CapitalizeString| is not set by |\Treatments|, but -% only in |\capitalize| or in |\capitalizewords|. -% \begin{macrocode} -% Capitalize first character of string, -\newcommand\capitalize[2][v]{% - \defaultTreatments% - \def\CapitalizeString{1}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \def\CapitalizeString{0}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\capitalizewords} -% \begin{macrocode} -% Capitalize first character of each word in string, -\newcommand\capitalizewords[2][v]{% - \defaultTreatments% - \def\CapitalizeString{2}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \def\CapitalizeString{0}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\reversestring} -% Reverses a string from back to front. To do this, a loop is set -% up in which characters are grabbed one at a time from the end of the -% given string, working towards the beginning of the string. The -% grabbed characters are concatenated onto the end of the working -% string, |\@reversedstring|. By the time the loop is complete -% |\@reversedstring| fully represents the reversed string. The result -% is placed into |\thestring|. -% \begin{macrocode} -% REVERSES SEQUENCE OF CHARACTERS IN STRING -\newcommand\reversestring[2][v]{% - \def\@reversedstring{}% - \+\@getstringlength{#2}{@@stringsize}\?% - \setcounter{@@@letterindex}{\the@@stringsize}% - \whiledo{\the@@@letterindex > 0}{% - \if e#1% - \substring[e]{#2}{\the@@@letterindex}{\the@@@letterindex}% - \else - \substring[q]{#2}{\the@@@letterindex}{\the@@@letterindex}% - \fi - \edef\@reversedstring{\@reversedstring\thestring}% - \addtocounter{@@@letterindex}{-1}% - }% - \edef\thestring{\@reversedstring}% - \if v#1\thestring\fi% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\convertchar} -% Takes a string, and replaces each occurance of a specified character -% with a replacement string. The only complexity in the logic is that -% a separate replacement algorithm exists depending on whether the -% specified character to be replaced is a normal character or an -% encoded character. -% \begin{macrocode} -% TAKES A STARTING STRING #2 AND SUBSTITUTES A SPECIFIED STRING #4 -% FOR EVERY OCCURANCE OF A PARTICULAR GIVEN CHARACTER #3. THE -% CHARACTER TO BE CONVERTED MAY BE EITHER A PLAIN CHARACTER OR -% AN ENCODABLE SYMBOL. -\newcommand\convertchar[4][v]{% - \+% - \edef\encodedstring{#2}% - \edef\encodedfromarg{#3}% - \edef\encodedtoarg{#4}% - \?% - \isnextbyte[q]{\EscapeChar}{\encodedfromarg}% - \if F\theresult% -% PLAIN "FROM" ARGUMENT - \@convertbytetostring[#1]{\encodedstring}{#3}{\encodedtoarg}% - \else -% ENCODABLE "FROM" ARGUMENT - \@convertsymboltostring[#1]{\encodedstring}% - {\expandafter\@gobble\encodedfromarg}{\encodedtoarg}% - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\convertword} -% Takes a string, a replaces each occurance of a specified string -% with a replacement string. -% \begin{macrocode} -\newcounter{@@matchloc} -% LIKE \convertchar, EXCEPT FOR WORDS -\newcommand\convertword[4][v]{% - \+\edef\@@teststring{#2}% - \edef\@fromstring{#3}% - \edef\@tostring{#4}\?% - \edef\@@@teststring{\@@teststring}% - \def\@buildfront{}% - \edef\@buildstring{\@@teststring}% - \setcounter{@charsfound}{0}% - \whiledo{\the@charsfound > -1}{% -% \end{macrocode} -% Seek occurance of |\@fromstring| in larger |\@@teststring| -% \begin{macrocode} - \whereisword[q]{\@@teststring}{\@fromstring}% - \setcounter{@matchloc}{\theresult}% - \ifthenelse{\the@matchloc = 0}% - {% -% \end{macrocode} -% Not found. Done. -% \begin{macrocode} - \setcounter{@charsfound}{-1}% - }% - {% -% \end{macrocode} -% Potential matchstring. -% \begin{macrocode} - \addtocounter{@charsfound}{1}% -% \end{macrocode} -% Grab current test string from beginning to point just prior -% to potential match. -% \begin{macrocode} - \addtocounter{@matchloc}{-1}% - \substring[e]{\@@@teststring}{1}{\the@matchloc}% -% \end{macrocode} -% The string |\@buildfront| is the total original string, with -% string substitutions, from character 1 to current potential match. -% \begin{macrocode} - \edef\@buildfront{\@buildfront\thestring}% -% \end{macrocode} -% See if potential matchstring takes us to end-of-string\ldots -% \begin{macrocode} - \addtocounter{@matchloc}{1}% - \addtocounter{@matchloc}{\the@matchsize}% - \ifthenelse{\the@matchloc > \the@@@stringsize}% - {% -% \end{macrocode} -% \ldots if so, then match is last one in string. Tack on replacement -% string to |\@buildfront| to create final string. Exit. -% \begin{macrocode} - \setcounter{@charsfound}{-1}% - \edef\@buildstring{\@buildfront\@tostring}% - }% - {% -% \end{macrocode} -% \ldots if not, redefine current teststring to begin at point following -% the current substitution. Make substitutions to current -% |\@buildstring| and |\@buildfront|. Loop through logic again on new -% teststring. -% \begin{macrocode} - \substring[e]{\@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}% - \edef\@@teststring{\thestring}% - \edef\@@@teststring{\@@teststring}% - \edef\@buildstring{\@buildfront\@tostring\@@@teststring}% - \edef\@buildfront{\@buildfront\@tostring}% - }% - }% - }% - \substring[#1]{\@buildstring}{1}{\@MAXSTRINGSIZE}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\resetlcwords} -% Removes all words from designated ``lower-case words'' list. This can -% be useful because large lists of lower-case words can significantly -% slow-down the function of |\capitalizetitle|. -% \begin{macrocode} -\setcounter{@lcwords}{0} -% RESET LOWER-CASE WORD COUNT; START OVER -\newcommand\resetlcwords[0]{% - \setcounter{@lcwords}{0}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\addlcwords} -% Add words to the list of designated ``lower-case words'' which will -% not be capitalized by |\capitalizetitle|. The input should consist of -% space-separated words, which are, in turn, passed on to |\addlcword|. -% \begin{macrocode} -% PROVIDE LIST OF SPACE-SEPARATED WORDS TO REMAIN LOWERCASE IN TITLES -\newcommand\addlcwords[1]{% - \getargs{#1}% - \setcounter{@wordindex}{0}% - \whiledo{\value{@wordindex} < \narg}{% - \addtocounter{@wordindex}{1}% - \addlcword{\csname arg\roman{@wordindex}\endcsname}% - } -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\addlcword} -% Add a word to the list of designated ``lower-case words'' which will -% not be capitalized by |\capitalizetitle|. -% \begin{macrocode} -% PROVIDE A SINGLE WORD TO REMAIN LOWERCASE IN TITLES -\newcommand\addlcword[1]{% - \addtocounter{@lcwords}{1}% - \expandafter\edef\csname lcword\roman{@lcwords}\endcsname{#1} -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\capitalizetitle} -% Makes every word of a multi-word input string capitalized, except for -% specifically noted ``lower-case words'' (examples might include -% prepositions, conjunctions, \etc). The first word of the input string -% is capitalized, while lower-case words, previously designated with -% |\addlcword| and |\addlcwords|, are left in lower case. -% \begin{macrocode} -% CAPITALIZE TITLE, EXCEPT FOR DESIGNATED "LOWER-CASE" WORDS -\newcommand\capitalizetitle[2][v]{% -% First, capitalize every word (save in encoded form, not printed) - \capitalizewords[e]{#2}% -% Then lowercase words that shouldn't be capitalized, like articles, -% prepositions, etc. (save in encoded form, not printed) - \setcounter{@wordindex}{0}% - \whiledo{\value{@wordindex} < \value{@lcwords}}{% - \addtocounter{@wordindex}{1}% - \edef\mystring{\thestring}% - \edef\lcword{\csname lcword\roman{@wordindex}\endcsname}% - \capitalize[e]{\lcword}% - \edef\ucword{\thestring}% - \convertword[e]{\mystring}{\ucword~}{\lcword~}% - } -% Finally, recapitalize the first word of the Title, and print it. - \capitalize[#1]{\thestring}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\rotateword} -% Moves first word of given string |#2| to end of string, including -% leading and trailing blank spaces. -% \begin{macrocode} -\newcommand\rotateword[2][v]{% - \+\edef\thestring{#2}\?% -% \end{macrocode} -% Rotate leading blank spaces to end of string -% \begin{macrocode} - \@treatleadingspaces[e]{\thestring}{}% -% \end{macrocode} -% Define end-of-rotate condition for |\substring| as next blank space -% \begin{macrocode} - \def\SeekBlankSpace{1}% -% \end{macrocode} -% Leave rotated characters alone -% \begin{macrocode} - \Treatments{1}{1}{1}{1}{1}{1}% -% \end{macrocode} -% Rotate to the next blank space or the end of string, whichever comes -% first. -% \begin{macrocode} - \substring[e]{\thestring}{1}{\@MAXSTRINGSIZE}% -% \end{macrocode} -% Rotate trailing spaces. -% \begin{macrocode} - \@treatleadingspaces[#1]{\thestring}{}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\removeword} -% Remove the first word of given string |#2|, including leading and -% trailing spaces. Note that logic is identical to |\rotateword|, -% except that affected spaces and characters are removed instead of -% being rotated. -% \begin{macrocode} -\newcommand\removeword[2][v]{% - \+\edef\thestring{#2}\?% -% \end{macrocode} -% The |{x}| final argument indicates to delete leading spaces. -% \begin{macrocode} - \@treatleadingspaces[e]{\thestring}{x}% - \def\SeekBlankSpace{1}% -% \end{macrocode} -% The Treatments are specified to remove all characters. -% \begin{macrocode} - \Treatments{0}{0}{0}{0}{0}{0}% - \substring[e]{\thestring}{1}{\@MAXSTRINGSIZE}% -% \end{macrocode} -% Trailing spaces are also deleted. -% \begin{macrocode} - \@treatleadingspaces[#1]{\thestring}{x}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\getnextword} -% A special case of |\getaword|, where word-to-get is specified as -% ``1''. -% \begin{macrocode} -% GETS NEXT WORD FROM STRING #2. -% NOTE: ROTATES BACK TO BEGINNING, AFTER STRING OTHERWISE EXHAUSTED -\newcommand\getnextword[2][v]{% - \getaword[#1]{#2}{1}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\getaword} -% Obtain a specified word number (|#3|) from string |#2|. Logic: rotate -% leading spaces to end of string; then loop |#3|~--~1 times through -% |\rotateword|. Finally, get next word. -% \begin{macrocode} -% GETS WORD #3 FROM STRING #2. -% NOTE: ROTATES BACK TO BEGINNING, AFTER STRING OTHERWISE EXHAUSTED -\newcommand\getaword[3][v]{% - \setcounter{@wordindex}{1}% - \+\edef\thestring{#2}\?% - \@treatleadingspaces[e]{\thestring}{}% - \whiledo{\value{@wordindex} < #3}{% - \rotateword[e]{\thestring}% - \addtocounter{@wordindex}{1}% - }% - \@getnextword[#1]{\thestring}% -} -% \end{macrocode} -% \end{macro} -% -% \begin{macro}{\rotateleadingspaces} -% Rotate leading spaces of string |#2| to the end of string. -% \begin{macrocode} -\newcommand\rotateleadingspaces[2][v]{% - \@treatleadingspaces[#1]{#2}{}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\removeleadingspaces} -% Remove leading spaces from string |#2|. -% \begin{macrocode} -\newcommand\removeleadingspaces[2][v]{% - \@treatleadingspaces[#1]{#2}{x}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\stringencode} -% \begin{macrocode} -% ENCODE STRING; UNLIKE OTHER COMMANDS, DEFAULT IS NO PRINT -\newcommand\stringencode[2][e]{% - \defaultTreatments% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\stringdecode} -% \begin{macrocode} -% DECODE STRING -\newcommand\stringdecode[2][v]{% - \defaultTreatments% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\gobblechar} -% Remove first character (not byte!) from string |#2|. Unlike just about -% all other \stringstrings commands, result is retokenized and not -% expanded. -% \begin{macrocode} -% SINGLE-CHARACTER VERSION OF \gobblechars. IN THIS CASE, TWO-BYTE -% ESCAPE SEQUENCES, WHEN ENCOUNTERED, COUNT AS A SINGLE GOBBLE. -\newcommand\gobblechar[2][q]{\+% - \@gobblearg{#2}{1}% - \?\retokenize[#1]{\gobbledword}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\gobblechars} -% Remove first |#3| characters (not bytes!) from string |#2|. -% Unlike just about all other \stringstrings commands, result is -% retokenized and not expanded. -% \begin{macrocode} -% USER CALLABLE VERSION OF \@gobblearg. TURNS ON REENCODING. -% GOBBLE FIRST #3 CHARACTERS FROM STRING #2. TWO-BYTE -% ESCAPE SEQUENCES, WHEN ENCOUNTERED, COUNT AS A SINGLE GOBBLE. -\newcommand\gobblechars[3][q]{\+% - \@gobblearg{#2}{#3}% - \?\retokenize[#1]{\gobbledword}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\retokenize} -% One of the key \stringstrings routines that provides several -% indispensible functions. Its function is to take an encoded string -% |#2| that has been given, and repopulate the string with its \LaTeX{} -% tokens in a |\def| form (not an expanded |\edef| form). It is -% useful if required to operate on a string outside of the -% \stringstrings library routines, following a \stringstrings -% manipulation. It is also useful to display certain tokens which -% cannot be manipulated in expanded form. See -% Table~\ref{tbl:prob} for a list of tokens that will only work when the -% resulting string is retokenized (and not expanded). -% -% Logic: Loop through each character of given string |#2|. Each -% successive character of the string is retokenized as |\inexttoken|, -% |\iinexttoken|, |\iiinexttoken|, |\ivnexttoken|, \etc, respectively. -% Then a series of strings are formed as\\ -% \\ -% |\def\buildtoken{}|\\ -% |\def\buildtokeni{\builtoken\inexttoken}|\\ -% |\def\buildtokenii{\builtokeni\iinexttoken}|\\ -% |\def\buildtokeniii{\builtokenii\iiinexttoken}|\\ -% |\def\buildtokeniv{\builtokeniii\ivnexttoken}|\\ -% \\ -% The last in the sequence of |\builtoken...| strings (renamed -% |\buildtokenq|) is the retokenized -% version of string |#2|. -% \begin{macrocode} -% CONVERTS ENCODED STRING BACK INTO TOKENIZED FORM (i.e., def'ED). -\newcommand\retokenize[2][q]{\+% - \edef\@svstring{#2}% - \edef\buildtoken{}% - \@getstringlength{#2}{@@stringsize}\?% - \setcounter{@@letterindex}{0}% - \whiledo{\the@@letterindex < \the@@stringsize}{% - \setcounter{@previousindex}{\the@@letterindex}% - \addtocounter{@@letterindex}{1}% - \substring[e]{\@svstring}{\the@@letterindex}{\the@@letterindex}% - \@retokenizechar{\thestring}{\roman{@@letterindex}nexttoken}% - \expandafter\def\csname buildtoken\roman{@@letterindex}% - \expandafter\endcsname\expandafter% - {\csname buildtoken\roman{@previousindex}\expandafter\endcsname% - \csname\roman{@@letterindex}nexttoken\endcsname}% - }% - \expandafter\def\expandafter\buildtokenq\expandafter{% - \csname buildtoken\roman{@@letterindex}\endcsname}% - \def\thestring{\buildtokenq}% - \if v#1\thestring\fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -% %%%%% COMMANDS TO EXTRACT STRING INFORMATION %%%%%%%%%%%%%%%%%%%%%%%%%% -% \end{macrocode} - -% The following group of commands extract information about a string, -% and store the result in a string called |\theresult|. Since the -% result is not a substring, a \textit{mode} of |[e]| carries no -% meaning. Only |[v]| and |[q]| modes apply here. -% \begin{macro}{\stringlength} -% Returns the length of the given string in \textit{characters}, not -% \textit{bytes}. -% \begin{macrocode} -% USER CALLABLE VERSION of \@getstringlength: -% GET'S STRING LENGTH OF [#2], PUTS RESULT IN \theresult. PRINTS RESULT -% UNLESS IN QUIET [q] MODE. -\newcommand\stringlength[2][v]{\+% - \@getstringlength{#2}{@@stringsize}% - \edef\theresult{\arabic{@@stringsize}}% - \if v#1\theresult\fi% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\findchars} -% Find number of occurances of character |#3| in string |#2|. -% \begin{macrocode} -% CHECKS TO SEE IF THE CHARACTER [#3] APPEARS ANYWHERE IN STRING [#2]. -% THE NUMBER OF OCCURANCES IS PRINTED OUT, EXCEPT WHEN [#1]=q, QUIET -% MODE. RESULT IS ALSO STORED IN \theresult . TO FIND SPACES, ARG3 -% SHOULD BE SET TO {~}, NOT { }. -\newcommand\findchars[3][v]{\+% - \@getstringlength{#2}{@@stringsize}% - \setcounter{@charsfound}{0}% - \setcounter{@@letterindex}{0}% -% \end{macrocode} -% Loop through each character of |#2|. -% \begin{macrocode} - \whiledo{\value{@@letterindex} < \value{@@stringsize}}{% - \addtocounter{@@letterindex}{1}% -% \end{macrocode} -% Test if the |@@letterindex| character of string |#2| equals |#3|. -% If so, add to tally. -% \begin{macrocode} - \testmatchingchar{#2}{\arabic{@@letterindex}}{#3}% - \ifmatchingchar\addtocounter{@charsfound}{1}\fi - }% - \edef\theresult{\arabic{@charsfound}}% - \if q#1\else\theresult\fi% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\whereischar} -% Similar to |\findchars|, but instead finds first occurance of match -% character |#3| within |#2| and returns its location within |#2|. -% \begin{macrocode} -% CHECKS TO FIND LOCATION OF FIRST OCCURANCE OF [#3] IN STRING [#2]. -% THE LOCATION IS PRINTED OUT, EXCEPT WHEN [#1]=q, QUIET -% MODE. RESULT IS ALSO STORED IN \theresult . TO FIND SPACES, ARG3 -% SHOULD BE SET TO {~}, NOT { }. -\newcommand\whereischar[3][v]{\+% - \@getstringlength{#2}{@@stringsize}% - \edef\@theresult{0}% - \setcounter{@@letterindex}{0}% -% \end{macrocode} -% Loop through characters of |#2| sequentially. -% \begin{macrocode} - \whiledo{\value{@@letterindex} < \value{@@stringsize}}{% - \addtocounter{@@letterindex}{1}% -% \end{macrocode} -% Look for match. If found, save character-location index, -% and reset loop index to break from loop. -% \begin{macrocode} - \testmatchingchar{#2}{\arabic{@@letterindex}}{#3}% - \ifmatchingchar% - \edef\@theresult{\the@@letterindex}% - \setcounter{@@letterindex}{\the@@stringsize}% - \fi - }% - \edef\theresult{\@theresult}% - \if q#1\else\theresult\fi% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\whereisword} -% Finds location of specified word (|#3|) in string |#2|. -% \begin{macrocode} -% LIKE \whereischar, EXCEPT FOR WORDS -\newcommand\whereisword[3][v]{\+% - \setcounter{@skipped}{0}% -% \end{macrocode} -% |\@@@@teststring| initially contains |#2|. As false alarms are -% located, the string will be redefined to lop off initial characters -% of string. -% \begin{macrocode} - \edef\@@@@teststring{#2}% - \edef\@matchstring{#3}% - \@getstringlength{#2}{@@stringsize}% - \setcounter{@@@stringsize}{\value{@@stringsize}}% - \@getstringlength{#3}{@matchsize}% - \setcounter{@matchmax}{\the@@stringsize}% - \addtocounter{@matchmax}{-\the@matchsize}% - \addtocounter{@matchmax}{1}% - \setcounter{@flag}{0}% -% \end{macrocode} -% Define |\matchchar| as the first character of the match string (|#3|). -% \begin{macrocode} - \substring[e]{#3}{1}{1}% - \edef\matchchar{\thestring}% - \whiledo{\the@flag = 0}{% -% \end{macrocode} -% Look for first character of match string within |\@@@@teststring|. -% \begin{macrocode} - \whereischar[q]{\@@@@teststring}{\matchchar}% - \setcounter{@matchloc}{\theresult}% - \ifthenelse{\equal{0}{\value{@matchloc}}}% -% \end{macrocode} -% If none found, we are done. -% \begin{macrocode} - {% - \setcounter{@flag}{1}% - }% -% \end{macrocode} -% If |\matchchar| is found, must determine if it is the beginning -% of the match string, or just an extraneous match (\ie false alarm). -% Extract substring -% of |\@@@@teststring|, of a size equal to the match string. -% Compare this extracted string with the match string. -% \begin{macrocode} - {% - \setcounter{@matchend}{\theresult}% - \addtocounter{@matchend}{\value{@matchsize}}% - \addtocounter{@matchend}{-1}% - \substring[e]{\@@@@teststring}{\the@matchloc}{\the@matchend}% - \ifthenelse{\equal{\thestring}{\@matchstring}}% -% \end{macrocode} -% Found a match! Save the match location -% \begin{macrocode} - {% - \setcounter{@flag}{1}% - \addtocounter{@matchloc}{\the@skipped}% - \edef\theresult{\the@matchloc}% - }% -% \end{macrocode} -% False alarm. Determine if lopping off the leading characters of -% |\@@@@teststring| (to discard the false-alarm occurance) is feasible. -% If lopping would take one past the end of the string, -% then no match is possible. If lopping permissible, redefine the -% string |\@@@@teststring|, keeping track of the total number of -% lopped-off characters in the counter |@skipped|. -% \begin{macrocode} - {% - \addtocounter{@skipped}{\the@matchloc}% - \addtocounter{@matchloc}{1}% - \ifthenelse{\value{@matchloc} > \value{@matchmax}}% - {% - \setcounter{@flag}{1}% - \edef\theresult{0}% - }% - {% - \substring[e]{\@@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}% - \edef\@@@@teststring{\thestring}% - }% - }% - }% - }% - \if q#1\else\theresult\fi% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\findwords} -% Finds the number of occurances of a word within the provided string -% \begin{macrocode} -% LIKE \findchar, EXCEPT FOR WORDS -\newcommand\findwords[3][v]{% - \+\edef\@@teststring{#2}\?% - \edef\@@@teststring{\@@teststring}% - \setcounter{@charsfound}{0}% - \whiledo{\the@charsfound > -1}{% -% \end{macrocode} -% Seek occurance of |#3| in the string to be tested -% \begin{macrocode} - \whereisword[q]{\@@teststring}{#3}% - \setcounter{@matchloc}{\theresult}% - \ifthenelse{\the@matchloc = 0}% - {% -% \end{macrocode} -% None found. Break from loop. -% \begin{macrocode} - \edef\theresult{\the@charsfound}% - \setcounter{@charsfound}{-1}% - }% - {% -% \end{macrocode} -% Found. Increment count. -% \begin{macrocode} - \addtocounter{@charsfound}{1}% - \addtocounter{@matchloc}{\the@matchsize}% - \ifthenelse{\the@matchloc > \the@@stringsize}% - {% -% \end{macrocode} -% This "find" takes us to the end-of-string. Break from loop now. -% \begin{macrocode} - \edef\theresult{\the@charsfound}% - \setcounter{@charsfound}{-1}% - }% - {% -% \end{macrocode} -% More string to search. Lop off what has been searched from string to -% be tested, and re-loop for next search. -% \begin{macrocode} - \substring[e]{\@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}% - \edef\@@teststring{\thestring}% - \edef\@@@teststring{\@@teststring}% - }% - }% - }% - \if q#1\else\theresult\fi% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\wordcount} -% Counts words (space-separated text) in a string. Simply removes one -% word at a time, counting the words as it goes. With each removal, -% checks for non-zero string size remaining. -% \begin{macrocode} -% WORD COUNT -\newcommand\wordcount[2][v]{\+% - \edef\@argv{#2} - \@getstringlength{\@argv}{@stringsize} - \setcounter{@iargc}{0} - \whiledo{\value{@stringsize} > 0}{% - \addtocounter{@iargc}{1}% - \removeword[e]{\@argv}% - \edef\@argv{\thestring}% - \@getstringlength{\@argv}{@stringsize}% - } - \edef\theresult{\arabic{@iargc}}% - \if v#1\theresult\fi% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\getargs} -% Parse a string of arguments in Unix-like manner. Define |\argv| as |#2|. -% Grabs leading word from |\argv| and puts it in |\argi|. Increment -% argument count; remove leading word from |\argv|. Repeat this process, -% with each new argument being placed in |\argii|, |\argiii|, |\argiv|, -% \etc~ Continue until size of |\argv| is exhausted. -% \begin{macrocode} -% OBTAINS ARGUMENTS (WORDS) IN #1 ALA UNIX getarg COMMAND -% narg CONTAINS NUMBER OF ARGUMENTS. ARGUMENTS CONTAINED IN -% argi, argii, argiii, argiv, ETC. -% v mode disabled -\newcommand\getargs[2][q]{\+% - \if v#1\def\@mode{q}\else\def\@mode{#1}\fi% - \edef\@argv{#2}% - \@getstringlength{\@argv}{@stringsize}% - \setcounter{@iargc}{0}% - \whiledo{\value{@stringsize} > 0}{% - \addtocounter{@iargc}{1}% - \getaword[\@mode]{\@argv}{1}% - \expandafter\edef\csname arg\roman{@iargc}\endcsname{\thestring}% - \removeword[e]{\@argv}% - \edef\@argv{\thestring}% - \@getstringlength{\@argv}{@stringsize}% - }% - \edef\narg{\arabic{@iargc}}% -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -%%%%% COMMANDS TO TEST STRINGS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% \end{macrocode} - -% The following group of commands test for various alphanumeric -% string conditions. -% \begin{macro}{\isnextbyte} -% This routine performs a simple test to determine if the first byte of -% string |#3| matches the byte given by |#2|. The only problem is that -% the test can produce a false negative if the first byte of the test -% string equals the match byte and the second byte of the test string -% equals the |SignalChar| (defined below). -% -% To resolve this possibility, the test is performed twice with two -% different values for |\SignalChar|, only one of which can produce -% a false negative for a given test string. If the two results match, -% then that result gives the correct answer to the question of whether -% the first byte of |#3| equals |#2|. If, however, the two results fail -% to match, then one can assume that one of the results is a false -% negative, and so a ``true'' condition results. -% \begin{macrocode} -% \end{macrocode} -% The following two ``signal characters,'' used for the two tests, -% can be any two distinct characters. They are used solely -% by |\isnextbyte|. -% \begin{macrocode} -\def\PrimarySignalChar{@} -\def\SecondarySignalChar{`} - -% \isnextbyte NEEDS TO OPERATE IN RAW (SINGLE BYTE) MODE SO AS TO -% PERFORM TESTS FOR PRESENCE OF \EscapeChar -% \end{macrocode} -% Incidentally, -% |\isnextbyte| can and is used by \stringstrings to detect -% multi-byte characters in a manner which may also be employed by the -% user. To do this: -% First, the string to be tested should be encoded. Then, |\isnextbyte| -% may be used to check for |\EscapeChar| which is how every multi-byte -% character will begin its encoding by the \stringstrings package. -% If |\EscapeChar| is detected as the next character, then the string to -% test may have its leading byte gobbled and the next character (called -% the Escape Code) may be tested, and compared against the known -% \stringstrings escape codes. The combination of -% Escape-Character/Escape-Code is how all multi-byte characters are -% encoded by the \stringstrings package. -% \begin{macrocode} -\newcommand\isnextbyte[3][v]{% -% \end{macrocode} -% Here's the first test\ldots -% \begin{macrocode} - \let\SignalChar\PrimarySignalChar% - \edef\@x{\if #2#3\else\SignalChar\fi}% - \edef\@x{\if \SignalChar\@x F\else T\fi}% -% \end{macrocode} -% \ldots and the second -% \begin{macrocode} - \let\SignalChar\SecondarySignalChar% - \edef\@y{\if #2#3\else\SignalChar\fi}% - \edef\@y{\if \SignalChar\@y F\else T\fi}% -% \end{macrocode} -% If the two tests produced the same result, then a comparison of |\@x\@y| -% and |\@y\@x| will show it. -% \begin{macrocode} -% BECAUSE THE METHOD ONLY PRODUCES FALSE NEGATIVES, IF RESULTS DON'T -% AGREE FROM USING TWO DIFFERENT SIGNAL CHARACTERS, RESULT MUST BE TRUE. - \ifthenelse{\equal{\@x\@y}{\@y\@x}} - {\edef\theresult{\@x}}% -% CORRECT THE FALSE NEGATIVE - {\edef\theresult{T}}% - \if q#1\else\theresult\fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testmatchingchar} -% This routine checks for a specified match-character within a target -% string. Unlike |\isnextbyte|, this -% routine checks for characters (single- or multi-byte) and not just -% individual bytes. Additionally, rather than testing the -% match-character against the first byte of the test-string, the user -% specifies (through |#2|) which byte of the test-string should be -% compared to the match-character. -% -% This routine is not as efficient as |\isnextbyte|, but much more -% versatile. -% \begin{macrocode} -% CHECKS TO SEE IF [#2]'th CHARACTER IN STRING [#1] EQUALS [#3] -% RESULT STORED IN BOOLEAN \ifmatchingchar -\newif\ifmatchingchar -\newcommand\testmatchingchar[3]{% - \setbox0=\hbox{% -% \end{macrocode} -% Extract desired character from test string -% \begin{macrocode} - \substring[e]{#1}{#2}{#2}\+% -% \end{macrocode} -% Determine if the match-character is a multi-byte symbol. -% \begin{macrocode} - \isnextbyte[q]{\EscapeChar}{#3}% - \if T\theresult% -% \end{macrocode} -% Is the tested character also a multi-byte symbol? -% \begin{macrocode} - \isnextbyte[q]{\EscapeChar}{\thestring}% - \if T\theresult% -% \end{macrocode} -% Yes it is\ldots Therefore, compare codes following the escape character -% \begin{macrocode} - \edef\@testcode{\expandafter\@DiscardNextChar\expandafter{#3}}% - \edef\@teststring{\@DiscardNextChar{\thestring}}% - \if \@teststring\@testcode\matchingchartrue\else\matchingcharfalse\fi - \else -% \end{macrocode} -% No, we are comparing a normal character against a multi-byte symbol -% (apples and oranges), a false comparison. -% \begin{macrocode} - \global\matchingcharfalse% - \fi - \else -% \end{macrocode} -% No, we are comparing two normal one-byte characters, not a mult-byte -% character. -% \begin{macrocode} - \if \thestring#3\global\matchingchartrue\else\global\matchingcharfalse\fi - \fi} -\?} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testcapitalized} -% This routine checks to see if first character of string is -% capitalized. The only quirk is that the routine must ascertain -% whether that character is a single-byte character or a multi-byte -% character. -% \begin{macrocode} -\newif\ifcapitalized -\newcommand\testcapitalized[1]{\+% - \setbox0=\hbox{% - \isnextbyte[q]{\EscapeChar}{#1}% - \if T\theresult% - \def\EncodingTreatment{e}% - \edef\rotatingword{#1}% -% \end{macrocode} -% Rotate the first [multi-byte] character of the string to the end -% of the string, lowering its case. Store as |\@stringA|. -% \begin{macrocode} - \def\AlphaCapsTreatment{2}% - \@defineactions% - \edef\@stringA{\ESCrotate{\expandafter\@gobble\rotatingword}}% -% \end{macrocode} -% Rotate the first [multi-byte] character of the string to the end -% of the string, retaining its case. Store as |\@stringB|. -% \begin{macrocode} - \def\AlphaCapsTreatment{1}% - \@defineactions% - \edef\@stringB{\ESCrotate{\expandafter\@gobble\rotatingword}}% - \else -% \end{macrocode} -% \ldots or, if the first character is a normal one-byte character\ldots -% Rotate the first [normal] character of the string to the end -% of the string, lowering its case. Store as |\@stringA|. -% \begin{macrocode} - \def\AlphaCapsTreatment{2}% - \edef\@stringA{\@rotate{#1}}% -% \end{macrocode} -% Rotate the first [normal] character of the string to the end -% of the string, retaining its case. Store as |\@stringB|. -% \begin{macrocode} - \def\AlphaCapsTreatment{1}% - \edef\@stringB{\@rotate{#1}}% - \fi -% \end{macrocode} -% Compare strings A and B, to see if changing the case of first letter -% altered the string -% \begin{macrocode} - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {\global\capitalizedfalse}{\global\capitalizedtrue}}\?% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testuncapitalized} -% This routine is the complement of |\testcapitalized|. The only -% difference is that the |\@stringA| has its case made upper for the -% comparison, instead of lowered. -% \begin{macrocode} -\newif\ifuncapitalized -\newcommand\testuncapitalized[1]{\+% - \setbox0=\hbox{% - \isnextbyte[q]{\EscapeChar}{#1}% - \if T\theresult% - \def\EncodingTreatment{e}% - \edef\rotatingword{#1}% - \def\AlphaTreatment{2}% - \@defineactions% - \edef\@stringA{\ESCrotate{\expandafter\@gobble\rotatingword}}% - \def\AlphaTreatment{1}% - \@defineactions% - \edef\@stringB{\ESCrotate{\expandafter\@gobble\rotatingword}}% - \else - \def\AlphaTreatment{2}% - \edef\@stringA{\@rotate{#1}}% - \def\AlphaTreatment{1}% - \edef\@stringB{\@rotate{#1}}% - \fi - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {\global\uncapitalizedfalse}{\global\uncapitalizedtrue}}\?% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testleadingalpha} -% Test if the leading character of the string is alphabetic. This is -% simply accomplished by checking whether the string is either -% capitalized or uncapitalized. If non-alphabetic, it will show -% up as false for both those tests. -% \begin{macrocode} -\newif\ifleadingalpha -\newcommand\testleadingalpha[1]{% - \testcapitalized{#1}% - \ifcapitalized - \leadingalphatrue% - \else - \testuncapitalized{#1}% - \ifuncapitalized - \leadingalphatrue% - \else - \leadingalphafalse% - \fi - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testuppercase} -% Checks to see if all alphabetic characters in a string are uppercase. -% Non-alphabetic characters don't affect the result, unless the string -% is composed solely of nonalphabetic characters, in which case the test -% results is false. -% \begin{macrocode} -\newif\ifuppercase -\newcommand\testuppercase[1]{% - \setbox0=\hbox{% -% \end{macrocode} -% Strip all non-alphabetic characters. Save as |\@stringA|. -% \begin{macrocode} - \Treatments{1}{1}{0}{0}{0}{0}% - \substring[e]{#1}{1}{\@MAXSTRINGSIZE}% - \edef\@stringA{\thestring}% -% \end{macrocode} -% Lower the case of all uppercase characters in |\@stringA|. Save as -% |\@stringB|. Compare these two strings. -% \begin{macrocode} - \def\AlphaTreatment{2}% - \substring[e]{#1}{1}{\@MAXSTRINGSIZE}% - \edef\@stringB{\thestring}% - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {% -% \end{macrocode} -% If the strings are equal, then all the alphabetic characters in the -% original string were uppercase. Need only check to make sure at -% least one alphabetic character was present in the original string. -% \begin{macrocode} - \@getstringlength{\@stringA}{@stringsize}% - \ifthenelse{\value{@stringsize} = 0}% - {\global\uppercasefalse}{\global\uppercasetrue}% - }% -% \end{macrocode} -% If strings are not equal, then the alphabetic characters of the -% original string were not all uppercase. Test false. -% \begin{macrocode} - {\global\uppercasefalse}}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\ifsolelyuppercase} -% Compare the original string to one made solely uppercase. If they are -% equal (and not composed solely of blankspaces), then the original -% string was solely uppercase to begin with. -% \begin{macrocode} -\newif\ifsolelyuppercase -\newcommand\testsolelyuppercase[1]{% - \setbox0=\hbox{% - \stringencode{#1}% - \edef\@stringA{\thestring}% - \solelyuppercase[e]{#1}% - \edef\@stringB{\thestring}% - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {% - \noblanks[q]{\@stringA}% - \@getstringlength{\thestring}{@stringsize}% - \ifthenelse{\value{@stringsize} = 0}% - {\global\solelyuppercasefalse}{\global\solelyuppercasetrue}% - }% - {\global\solelyuppercasefalse}}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testlowercase} -% This routine is the complement to |\testuppercase|, with corresponding -% logic. -% \begin{macrocode} -\newif\iflowercase -\newcommand\testlowercase[1]{% - \setbox0=\hbox{% - \Treatments{1}{1}{0}{0}{0}{0}% - \substring[e]{#1}{1}{\@MAXSTRINGSIZE}% - \edef\@stringA{\thestring}% - \def\AlphaCapsTreatment{2}% - \substring[e]{#1}{1}{\@MAXSTRINGSIZE}% - \edef\@stringB{\thestring}% - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {% - \@getstringlength{\@stringA}{@stringsize}% - \ifnum\value{@stringsize}= 0\relax% - \global\lowercasefalse\else\global\lowercasetrue\fi% - }% - {\global\lowercasefalse}}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testsolelylowercase} -% This routine is the complement to |\testsolelyuppercase|, with -% corresponding logic. -% \begin{macrocode} -\newif\ifsolelylowercase -\newcommand\testsolelylowercase[1]{% - \setbox0=\hbox{% - \stringencode{#1}% - \edef\@stringA{\thestring}% - \solelylowercase[e]{#1}% - \edef\@stringB{\thestring}% - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {% - \noblanks[q]{\@stringA}% - \@getstringlength{\thestring}{@stringsize}% - \ifthenelse{\value{@stringsize} = 0}% - {\global\solelylowercasefalse}{\global\solelylowercasetrue}% - }% - {\global\solelylowercasefalse}}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\testalphabetic} -% Comparable to |\testsolelyuppercase| and -% |\testsolelylowercase| in its logic, this routine tests whether -% the string is purely alphabetic or not. -% \begin{macrocode} -\newif\ifalphabetic -\newcommand\testalphabetic[1]{% - \setbox0=\hbox{% - \stringencode{#1}% - \edef\@stringA{\thestring}% - \alphabetic[e]{#1}% - \edef\@stringB{\thestring}% - \ifthenelse{\equal{\@stringA}{\@stringB}}% - {% - \noblanks[q]{\@stringA}% - \@getstringlength{\thestring}{@stringsize}% - \ifthenelse{\value{@stringsize} = 0}% - {\global\alphabeticfalse}{\global\alphabetictrue}% - }% - {\global\alphabeticfalse}}% - \defaultTreatments% -} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -% -%%%%% SUPPORT ROUTINES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% -% \end{macrocode} -% The following routines support the execution of the \stringstrings -% package. - -% \begin{macro}{\ESCrotate} -% After the escape character has been ascertained as the next character, -% this routine operates on the subsequent escape code to rotate the -% symbol to end of string, in the fashion of macro |\@rotate|. -% \begin{macrocode} -\newcommand\ESCrotate[1]{% - \if\UvariCode#1\@uvariaction\else - \if\UvariiCode#1\@uvariiaction\else - \if\UvariiiCode#1\@uvariiiaction\else - \if\@fromcode#1\@tostring\else - \if\PipeCode#1\@pipeaction\else - \if\DollarCode#1\@dollaraction\else - \if\CaratCode#1\@carataction\else - \if\CircumflexCode#1\@circumflexaction\else - \if\TildeCode#1\@tildeaction\else - \if\UmlautCode#1\@umlautaction\else - \if\GraveCode#1\@graveaction\else - \if\AcuteCode#1\@acuteaction\else - \if\MacronCode#1\@macronaction\else - \if\OverdotCode#1\@overdotaction\else - \if\LeftBraceCode#1\@leftbraceaction\else - \if\RightBraceCode#1\@rightbraceaction\else - \if\UnderscoreCode#1\@underscoreaction\else - \if\DaggerCode#1\@daggeraction\else - \if\DoubleDaggerCode#1\@doubledaggeraction\else - \if\SectionSymbolCode#1\@sectionsymbolaction\else - \if\PilcrowCode#1\@pilcrowaction\else - \if\LBCode#1\@lbaction\else - \if\RBCode#1\@rbaction\else - \if\BreveCode#1\@breveaction\else - \if\CaronCode#1\@caronaction\else - \if\DoubleAcuteCode#1\@doubleacuteaction\else - \if\CedillaCode#1\@cedillaaction\else - \if\UnderdotCode#1\@underdotaction\else - \if\ArchJoinCode#1\@archjoinaction\else - \if\LineUnderCode#1\@lineunderaction\else - \if\CopyrightCode#1\@copyrightaction\else - \if\PoundsCode#1\@poundsaction\else - \if\AEscCode#1\@AEscaction\else - \if\aescCode#1\@aescaction\else - \if\OEthelCode#1\@OEthelaction\else - \if\oethelCode#1\@oethelaction\else - \if\AngstromCode#1\@Angstromaction\else - \if\angstromCode#1\@angstromaction\else - \if\SlashedOCode#1\@slashedOaction\else - \if\SlashedoCode#1\@slashedoaction\else - \if\BarredlCode#1\@barredlaction\else - \if\BarredLCode#1\@barredLaction\else - \if\EszettCode#1\@eszettaction\else - \expandafter\@gobble#1\undecipherable% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@getnextword} -% A low-level routine designed to extract the next [space-delimited] -% word of the primary -% argument. It has several quirks: if the passed string has one leading -% space, it is included as part of next word. If it has two leading -% [hard]spaces, the 2$^\mathrm{nd}$ hard space \textit{is} the next word. -% Using the higher-level |\getnextword| deals automatically with -% these abberant possibilities. -% \begin{macrocode} -\newcommand\@getnextword[2][v]{% - \defaultTreatments% - \def\SeekBlankSpace{2}% - \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}% - \def\SeekBlankSpace{0}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@retokenizechar} -% This command is the guts of the retokenize command. It grabs the -% character provided in string |#1| and assigns it to a unique token -% whose name is created from the string |#2|. The command has two -% primary |\if| branches. The first branch is taken if the -% character is a special two-byte-encoded escape-sequence, while -% the second branch is taken if the character is a |&|, |%|, |#|, -% a blankspace, or any simple one-byte character. -% \begin{macrocode} -\newcommand\@retokenizechar[2]{% - \isnextbyte[q]{\EscapeChar}{#1}% - \if T\theresult% - \edef\@ESCcode{\expandafter\@gobble#1}% - \if\UvariCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\Uvari}\else - \if\UvariiCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\Uvarii}\else - \if\UvariiiCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\Uvariii}\else - \if\PipeCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\Pipe}\else - \if\DollarCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\$}\else - \if\CaratCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\Carat}\else - \if\CircumflexCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\^}\else - \if\TildeCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\~}\else - \if\UmlautCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\"}\else - \if\GraveCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\`}\else - \if\AcuteCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\'}\else - \if\MacronCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\=}\else - \if\OverdotCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\.}\else - \if\LeftBraceCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\{}\else - \if\RightBraceCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\}}\else - \if\UnderscoreCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\_}\else - \if\DaggerCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\dag}\else - \if\DoubleDaggerCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\ddag}\else - \if\SectionSymbolCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\S}\else - \if\PilcrowCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\P}\else - \if\LBCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\SaveLB}\else - \if\RBCode\@ESCcode% - \expandafter\def\csname#2\endcsname{\SaveRB}\else - \if\BreveCode\@ESCcode\expandafter\def\csname#2\endcsname{\u}\else - \if\CaronCode\@ESCcode\expandafter\def\csname#2\endcsname{\v}\else - \if\DoubleAcuteCode\@ESCcode\expandafter\def\csname#2\endcsname{\H}\else - \if\CedillaCode\@ESCcode\expandafter\def\csname#2\endcsname{\c}\else - \if\UnderdotCode\@ESCcode\expandafter\def\csname#2\endcsname{\d}\else - \if\ArchJoinCode\@ESCcode\expandafter\def\csname#2\endcsname{\t}\else - \if\LineUnderCode\@ESCcode\expandafter\def\csname#2\endcsname{\b}\else - \if\CopyrightCode\@ESCcode\expandafter\def\csname#2\endcsname{\copyright}\else - \if\PoundsCode\@ESCcode\expandafter\def\csname#2\endcsname{\pounds}\else - \if\AEscCode\@ESCcode\expandafter\def\csname#2\endcsname{\AE}\else - \if\aescCode\@ESCcode\expandafter\def\csname#2\endcsname{\ae}\else - \if\OEthelCode\@ESCcode\expandafter\def\csname#2\endcsname{\OE}\else - \if\oethelCode\@ESCcode\expandafter\def\csname#2\endcsname{\oe}\else - \if\AngstromCode\@ESCcode\expandafter\def\csname#2\endcsname{\AA}\else - \if\angstromCode\@ESCcode\expandafter\def\csname#2\endcsname{\aa}\else - \if\SlashedOCode\@ESCcode\expandafter\def\csname#2\endcsname{\O}\else - \if\SlashedoCode\@ESCcode\expandafter\def\csname#2\endcsname{\o}\else - \if\BarredlCode\@ESCcode\expandafter\def\csname#2\endcsname{\l}\else - \if\BarredLCode\@ESCcode\expandafter\def\csname#2\endcsname{\L}\else - \if\EszettCode\@ESCcode\expandafter\def\csname#2\endcsname{\ss}\else - \expandafter\def\csname#2\endcsname{\undecipherable}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \else - \expandafter\ifx\expandafter\% - \expandafter\def\csname#2\endcsname{\&}\else - \expandafter\ifx\expandafter\%#1% - \expandafter\def\csname#2\endcsname{\%}\else - \expandafter\ifx\expandafter\##1% - \expandafter\def\csname#2\endcsname{\#}\else - \if\EncodedBlankSpace#1\expandafter\def\csname#2\endcsname{\ }\else - \expandafter\edef\csname#2\endcsname{#1}% - \fi - \fi - \fi - \fi - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@defineactions} -% This routine defines how encoded characters are to be treated by the -% |\ESCrotate| routine, depending on the [encoding, capitalization, -% blank, symbol, \textit{etc.}] treatments that have -% been \textit{a priori} specified. -% \begin{macrocode} -% \@blankaction AND OTHER ...action'S ARE SET, DEPENDING ON VALUES OF -% TREATMENT FLAGS. CHARS ARE EITHER ENCODED, DECODED, OR REMOVED. -\newcommand\@defineactions{% -% SET UP TREATMENT FOR SPACES, ENCODED SPACES, AND [REENCODED] SYMBOLS - \if e\EncodingTreatment% -% ENCODE SPACES, KEEP ENCODED SPACES ENCODED, ENCODE SYMBOLS. - \edef\@blankaction{\EncodedBlankSpace}% - \def\@dollaraction{\EncodedDollar}% - \def\@pipeaction{\EncodedPipe}% - \def\@uvariaction{\EncodedUvari}% - \def\@uvariiaction{\EncodedUvarii}% - \def\@uvariiiaction{\EncodedUvariii}% - \def\@carataction{\EncodedCarat}% - \def\@circumflexaction{\EncodedCircumflex}% - \def\@tildeaction{\EncodedTilde}% - \def\@umlautaction{\EncodedUmlaut}% - \def\@graveaction{\EncodedGrave}% - \def\@acuteaction{\EncodedAcute}% - \def\@macronaction{\EncodedMacron}% - \def\@overdotaction{\EncodedOverdot}% - \def\@breveaction{\EncodedBreve}% - \def\@caronaction{\EncodedCaron}% - \def\@doubleacuteaction{\EncodedDoubleAcute}% - \def\@cedillaaction{\EncodedCedilla}% - \def\@underdotaction{\EncodedUnderdot}% - \def\@archjoinaction{\EncodedArchJoin}% - \def\@lineunderaction{\EncodedLineUnder}% - \def\@copyrightaction{\EncodedCopyright}% - \def\@poundsaction{\EncodedPounds}% - \def\@leftbraceaction{\EncodedLeftBrace}% - \def\@rightbraceaction{\EncodedRightBrace}% - \def\@underscoreaction{\EncodedUnderscore}% - \def\@daggeraction{\EncodedDagger}% - \def\@doubledaggeraction{\EncodedDoubleDagger}% - \def\@sectionsymbolaction{\EncodedSectionSymbol}% - \def\@pilcrowaction{\EncodedPilcrow}% - \def\@eszettaction{\EncodedEszett}% - \def\@lbaction{\EncodedLB}% - \def\@rbaction{\EncodedRB}% - \if 2\AlphaCapsTreatment% - \def\@AEscaction{\Encodedaesc}% - \def\@OEthelaction{\Encodedoethel}% - \def\@Angstromaction{\Encodedangstrom}% - \def\@slashedOaction{\EncodedSlashedo}% - \def\@barredLaction{\EncodedBarredl}% - \else - \def\@AEscaction{\EncodedAEsc}% - \def\@OEthelaction{\EncodedOEthel}% - \def\@Angstromaction{\EncodedAngstrom}% - \def\@slashedOaction{\EncodedSlashedO}% - \def\@barredLaction{\EncodedBarredL}% - \fi - \if 2\AlphaTreatment% - \def\@aescaction{\EncodedAEsc}% - \def\@oethelaction{\EncodedOEthel}% - \def\@angstromaction{\EncodedAngstrom}% - \def\@slashedoaction{\EncodedSlashedO}% - \def\@barredlaction{\EncodedBarredL}% - \else - \def\@aescaction{\Encodedaesc}% - \def\@oethelaction{\Encodedoethel}% - \def\@angstromaction{\Encodedangstrom}% - \def\@slashedoaction{\EncodedSlashedo}% - \def\@barredlaction{\EncodedBarredl}% - \fi - \else -% EncodingTreatment=v or q: -% LEAVE SPACES ALONE; RESTORE ENCODED SPACES AND SYMBOLS - \def\@blankaction{\BlankSpace}% - \def\@dollaraction{\Dollar}% - \def\@pipeaction{\Pipe}% - \def\@uvariaction{\Uvari}% - \def\@uvariiaction{\Uvarii}% - \def\@uvariiiaction{\Uvariii}% - \def\@carataction{\Carat}% - \def\@circumflexaction{\Circumflex}% - \def\@tildeaction{\Tilde}% - \def\@umlautaction{\Umlaut}% - \def\@graveaction{\Grave}% - \def\@acuteaction{\Acute}% - \def\@macronaction{\Macron}% - \def\@overdotaction{\Overdot}% - \def\@breveaction{\Breve}% - \def\@caronaction{\Caron}% - \def\@doubleacuteaction{\DoubleAcute}% - \def\@cedillaaction{\Cedilla}% - \def\@underdotaction{\Underdot}% - \def\@archjoinaction{\ArchJoin}% - \def\@lineunderaction{\LineUnder}% - \def\@copyrightaction{\Copyright}% - \def\@poundsaction{\Pounds}% - \def\@leftbraceaction{\LeftBrace}% - \def\@rightbraceaction{\RightBrace}% - \def\@underscoreaction{\Underscore}% - \def\@daggeraction{\Dagger}% - \def\@doubledaggeraction{\DoubleDagger}% - \def\@sectionsymbolaction{\SectionSymbol}% - \def\@pilcrowaction{\Pilcrow}% - \def\@eszettaction{\Eszett}% - \def\@lbaction{\UnencodedLB}% - \def\@rbaction{\UnencodedRB}% - \if 2\AlphaCapsTreatment% - \def\@AEscaction{\aesc}% - \def\@OEthelaction{\oethel}% - \def\@Angstromaction{\angstrom}% - \def\@slashedOaction{\Slashedo}% - \def\@barredLaction{\Barredl}% - \else - \def\@AEscaction{\AEsc}% - \def\@OEthelaction{\OEthel}% - \def\@Angstromaction{\Angstrom}% - \def\@slashedOaction{\SlashedO}% - \def\@barredLaction{\BarredL}% - \fi - \if 2\AlphaTreatment% - \def\@aescaction{\AEsc}% - \def\@oethelaction{\OEthel}% - \def\@angstromaction{\Angstrom}% - \def\@slashedoaction{\SlashedO}% - \def\@barredlaction{\BarredL}% - \else - \def\@aescaction{\aesc}% - \def\@oethelaction{\oethel}% - \def\@angstromaction{\angstrom}% - \def\@slashedoaction{\Slashedo}% - \def\@barredlaction{\Barredl}% - \fi - \fi -% REMOVE SPACES AND ENCODED SPACES? - \if 0\BlankTreatment% - \edef\@blankaction{}% - \fi -% REMOVE ENCODED SYMBOLS? - \if 0\SymbolTreatment% - \def\@dollaraction{}% - \def\@pipeaction{}% - \def\@carataction{}% - \def\@circumflexaction{}% - \def\@tildeaction{}% - \def\@umlautaction{}% - \def\@graveaction{}% - \def\@acuteaction{}% - \def\@macronaction{}% - \def\@overdotaction{}% - \def\@breveaction{}% - \def\@caronaction{}% - \def\@doubleacuteaction{}% - \def\@cedillaaction{}% - \def\@underdotaction{}% - \def\@archjoinaction{}% - \def\@lineunderaction{}% - \def\@copyrightaction{}% - \def\@poundsaction{}% - \def\@leftbraceaction{}% - \def\@rightbraceaction{}% - \def\@underscoreaction{}% - \def\@daggeraction{}% - \def\@doubledaggeraction{}% - \def\@sectionsymbolaction{}% - \def\@pilcrowaction{}% - \def\@lbaction{}% - \def\@rbaction{}% - \fi -% REMOVE ENCODED ALPHACAPS? - \if 0\AlphaCapsTreatment% - \def\@AEscaction{}% - \def\@OEthelaction{}% - \def\@Angstromaction{}% - \def\@slashedOaction{}% - \def\@barredLaction{}% - \fi -% REMOVE ENCODED ALPHA? - \if 0\AlphaTreatment% - \def\@aescaction{}% - \def\@oethelaction{}% - \def\@angstromaction{}% - \def\@slashedoaction{}% - \def\@barredlaction{}% - \def\@eszettaction{}% - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@forcecapson} -% Force capitalization of strings processed by |\substring| for the -% time being. -% \begin{macrocode} -\newcommand\@forcecapson{% - \def\AlphaTreatment{2}% - \def\AlphaCapsTreatment{1}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@relaxcapson} -% Restore prior treatments following a period of enforced capitalization. -% \begin{macrocode} -\newcommand\@relaxcapson{% - \let\AlphaTreatment\SaveAlphaTreatment% - \let\AlphaCapsTreatment\SaveAlphaCapsTreatment% - \@defineactions% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@decodepointer} -% As pertains to arguments 3 and 4 of |\substring|, this routine -% implements use of the |$| character to mean END-OF-STRING, -% and |$-{|\textit{integer}|}| for addressing relative to the -% END-OF-STRING. -% \begin{macrocode} -\newcommand\@decodepointer[2][\value{@stringsize}]{% - \isnextbyte[q]{$}{#2}% - \if T\theresult% - \isnextbyte[q]{-}{\expandafter\@gobble#2}% - \if T\theresult% - \setcounter{@@@letterindex}{#1}% - \@gobblearg{#2}{2}% - \addtocounter{@@@letterindex}{-\gobbledword}% - \edef\@fromtoindex{\value{@@@letterindex}}% - \else - \edef\@fromtoindex{#1}% - \fi - \else - \edef\@fromtoindex{#2}% - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@getstringlength} -% Get's string length of |#1|, puts result in counter |#2|. -% \begin{macrocode} -\newcommand\@getstringlength[2]{% - \edef\@@teststring{#1\endofstring}% - \ifthenelse{\equal{\@@teststring}{\endofstring}}% - {\setcounter{#2}{0}}% - {% - \setcounter{@gobblesize}{1}% - \whiledo{\value{@gobblesize} < \@MAXSTRINGSIZE}{% -% - \@gobblearg{\@@teststring}{1}% - \edef\@@teststring{\gobbledword}% - \ifthenelse{\equal{\@@teststring}{\endofstring}}% - {\setcounter{#2}{\value{@gobblesize}}% - \setcounter{@gobblesize}{\@MAXSTRINGSIZE}}% - {\addtocounter{@gobblesize}{1}}% - }% - }% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@gobblearg} -% Gobble first |#2| characters from string |#1|. The -% result is stored in |\gobbledword|. Two-byte escape sequences, -% when encountered, count as a single gobble. -% \begin{macrocode} -\newcommand\@gobblearg[2]{% - \setcounter{@letterindex}{0}% - \setcounter{@gobbleindex}{#2}% - \edef\gobbledword{#1}% - \whiledo{\value{@letterindex} < \value{@gobbleindex}}{% - \isnextbyte[q]{\EscapeChar}{\gobbledword}% - \if T\theresult% -% GOBBLE ESCAPE CHARACTER - \edef\gobbledword{\@DiscardNextChar{\gobbledword}}% - \fi -% GOBBLE NORMAL CHARACTER OR ESCAPE CODE - \edef\gobbledword{\@DiscardNextChar{\gobbledword}}% - \addtocounter{@letterindex}{1}% - }% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@DiscardNextChar} -% Remove the next character from the argument string. Since -% |\@gobble| skips spaces, the routine must first look for the case of -% a leading blankspace. If none is found, proceed with a normal -% |\@gobble|. Note: as per \LaTeX{} convention, |\@DiscardNextChar| -% treats double/multi-softspaces as single space. -% \begin{macrocode} -\newcommand\@DiscardNextChar[1]{% - \expandafter\if\expandafter\BlankSpace#1\else - \expandafter\@gobble#1% - \fi -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@convertsymboltostring} -% Routine for converting an encodable symbol (|#3|) into string (|#4|), -% for every occurance in the given string |#2|. -% \begin{macrocode} -\newcommand\@convertsymboltostring[4][v]{% - \def\@fromcode{#3}% - \def\@tostring{#4}% - \def\EncodingTreatment{e}% - \substring[e]{#2}{1}{\@MAXSTRINGSIZE}% - \@convertoff% - \if e#1\else\substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}\fi% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@convertbytetostring} -% Routine for converting an plain byte (|#3|) into string (|#4|), -% for every occurance in the given string |#2|. -% \begin{macrocode} -\newcommand\@convertbytetostring[4][v]{% - \def\@frombyte{#3}% - \def\@tostring{#4}% - \def\EncodingTreatment{e}% - \substring[e]{#2}{1}{\@MAXSTRINGSIZE}% - \@convertoff% - \if e#1\else\substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}\fi% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@treatleadingspaces} -% This routine will address the leading spaces of string |#2|. If -% argument |#3| is an 'x' character, those leading spaces will be -% deleted from the string. Otherwise, those leading spaces will be -% rotated to the end of the string. -% \begin{macrocode} -\newcommand\@treatleadingspaces[3][v]{\+% - \defaultTreatments% - \edef\thestring{#2}% - \@getstringlength{\thestring}{@stringsize}% - \setcounter{@maxrotation}{\value{@stringsize}}% - \setcounter{@letterindex}{0}% - \whiledo{\value{@letterindex} < \value{@maxrotation}}{% - \addtocounter{@letterindex}{1}% - \isnextbyte[q]{\EncodedBlankSpace}{\thestring}% - \if F\theresult\isnextbyte[q]{\BlankSpace}{\thestring}\fi% - \if T\theresult% - \isnextbyte[q]{#3}{x}% - \if F\theresult% -% NORMAL OR ENCODED BLANK... ROTATE IT - \edef\thestring{\@rotate{\thestring}}% - \else -% NORMAL OR ENCODED BLANK... DELETE IT (IF 3rd ARG=X) - \@gobblearg{\thestring}{1}% - \edef\thestring{\gobbledword}% - \fi - \else - \setcounter{@maxrotation}{\value{@letterindex}}% - \fi - }\?% - \substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}% -} -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@convertoff} -% This routine is an initialization routine to -% guarantee that there is no conversion of |\@frombyte| to |\@tostring|, -% until further notice. It accomplishes this -% by setting up such that subsequent |\if\@frombyte| and -% |\if\@fromcode| clauses will automatically fail. -% \begin{macrocode} -\newcommand\@convertoff{\def\@frombyte{xy}\def\@tostring{}% - \def\@fromcode{xy}} -\@convertoff -% \end{macrocode} -% \end{macro} - -% \begin{macro}{\@rotate} -% The following code is the engine of the string manipulation routine. -% It is a tree of successive \LaTeX{} commands (each of which is -% composed of an |\if...| cascade) which have the net -% effect of rotating the first letter of the string into the last -% position. Depending on modes set by |\@defineactions| and -% |\defaultTreatments|, the leading character is either encoded, -% decoded, or removed in the process. -% Note: |\@rotate| loses track of double/multi-spaces, per \LaTeX{} -% convention, unless encoded blanks (|~|) are used. -% \begin{macrocode} -\newcommand\@rotate[1]{% -% CHECK BYTE CONVERSION TEST FIRST - \if \@frombyte#1\@tostring\else -% MUST CHECK FOR MULTI-BYTE CHARACTERS NEXT, SO THAT ENCODING CHARACTER -% ISN'T MISTAKEN FOR A NORMAL CHARACTER LATER IN MACRO. - \if 0\SymbolTreatment% - \@removeExpandableSymbols{#1}% - \else - \@rotateExpandableSymbols{#1}% - \fi - \fi -} - -\newcommand\@rotateExpandableSymbols[1]{% -% INDIRECT (EXPANDABLE) SYMBOLS - \expandafter\ifx\expandafter\\&\else - \expandafter\ifx\expandafter\%#1\%\else - \expandafter\ifx\expandafter\##1\#\else - \@rotateBlankSpaces{#1}% - \fi - \fi - \fi -} - -\newcommand\@removeExpandableSymbols[1]{% -% INDIRECT (EXPANDABLE) SYMBOLS - \expandafter\ifx\expandafter\\else - \expandafter\ifx\expandafter\%#1\else - \expandafter\ifx\expandafter\##1\else - \@rotateBlankSpaces{#1}% - \fi - \fi - \fi -} - -\newcommand\@rotateBlankSpaces[1]{% - \expandafter\ifx\expandafter$#1$\else% <---RETAIN GOING INTO/FROM MATH MODE -% THE FOLLOWING FINDS TILDES, BUT MUST COME AFTER EXPANDABLE SYMBOL -% SEARCH, OR ELSE IT FINDS THEM TOO, BY MISTAKE. - \if \EncodedBlankSpace#1\@blankaction\else% <--- FINDS REENCODED TILDE -% THE FOLLOWING SHOULD FIND TILDES, BUT DOESN'T... THUS, COMMENTED OUT. -% \expandafter\ifx\expandafter\EncodedBlankSpace#1\@blankaction\else - \if \BlankSpace#1\@blankaction\else - \if 2\AlphaTreatment% - \@chcaseAlpha{#1}% - \else - \if 0\AlphaTreatment% - \@removeAlpha{#1}% - \else - \@rotateAlpha{#1}% - \fi - \fi - \fi -% \fi - \fi - \fi -} - -\newcommand\@rotateAlpha[1]{% -% LOWERCASE - \if a#1a\else - \if b#1b\else - \if c#1c\else - \if d#1d\else - \if e#1e\else - \if f#1f\else - \if g#1g\else - \if h#1h\else - \if i#1i\else - \if j#1j\else - \if k#1k\else - \if l#1l\else - \if m#1m\else - \if n#1n\else - \if o#1o\else - \if p#1p\else - \if q#1q\else - \if r#1r\else - \if s#1s\else - \if t#1t\else - \if u#1u\else - \if v#1v\else - \if w#1w\else - \if x#1x\else - \if y#1y\else - \if z#1z\else - \if 2\AlphaCapsTreatment% - \@chcaseAlphaCaps{#1}% - \else - \if 0\AlphaCapsTreatment% - \@removeAlphaCaps{#1}% - \else - \@rotateAlphaCaps{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@removeAlpha[1]{% -% LOWERCASE - \if a#1\else - \if b#1\else - \if c#1\else - \if d#1\else - \if e#1\else - \if f#1\else - \if g#1\else - \if h#1\else - \if i#1\else - \if j#1\else - \if k#1\else - \if l#1\else - \if m#1\else - \if n#1\else - \if o#1\else - \if p#1\else - \if q#1\else - \if r#1\else - \if s#1\else - \if t#1\else - \if u#1\else - \if v#1\else - \if w#1\else - \if x#1\else - \if y#1\else - \if z#1\else - \if 2\AlphaCapsTreatment% - \@chcaseAlphaCaps{#1}% - \else - \if 0\AlphaCapsTreatment% - \@removeAlphaCaps{#1}% - \else - \@rotateAlphaCaps{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@chcaseAlpha[1]{% -% LOWERCASE TO UPPERCASE - \if a#1A\else - \if b#1B\else - \if c#1C\else - \if d#1D\else - \if e#1E\else - \if f#1F\else - \if g#1G\else - \if h#1H\else - \if i#1I\else - \if j#1J\else - \if k#1K\else - \if l#1L\else - \if m#1M\else - \if n#1N\else - \if o#1O\else - \if p#1P\else - \if q#1Q\else - \if r#1R\else - \if s#1S\else - \if t#1T\else - \if u#1U\else - \if v#1V\else - \if w#1W\else - \if x#1X\else - \if y#1Y\else - \if z#1Z\else - \if 2\AlphaCapsTreatment% - \@chcaseAlphaCaps{#1}% - \else - \if 0\AlphaCapsTreatment% - \@removeAlphaCaps{#1}% - \else - \@rotateAlphaCaps{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@rotateAlphaCaps[1]{% -% UPPERCASE - \if A#1A\else - \if B#1B\else - \if C#1C\else - \if D#1D\else - \if E#1E\else - \if F#1F\else - \if G#1G\else - \if H#1H\else - \if I#1I\else - \if J#1J\else - \if K#1K\else - \if L#1L\else - \if M#1M\else - \if N#1N\else - \if O#1O\else - \if P#1P\else - \if Q#1Q\else - \if R#1R\else - \if S#1S\else - \if T#1T\else - \if U#1U\else - \if V#1V\else - \if W#1W\else - \if X#1X\else - \if Y#1Y\else - \if Z#1Z\else - \if 0\NumeralTreatment% - \@removeNumerals{#1}% - \else - \@rotateNumerals{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@removeAlphaCaps[1]{% -% UPPERCASE - \if A#1\else - \if B#1\else - \if C#1\else - \if D#1\else - \if E#1\else - \if F#1\else - \if G#1\else - \if H#1\else - \if I#1\else - \if J#1\else - \if K#1\else - \if L#1\else - \if M#1\else - \if N#1\else - \if O#1\else - \if P#1\else - \if Q#1\else - \if R#1\else - \if S#1\else - \if T#1\else - \if U#1\else - \if V#1\else - \if W#1\else - \if X#1\else - \if Y#1\else - \if Z#1\else - \if 0\NumeralTreatment% - \@removeNumerals{#1}% - \else - \@rotateNumerals{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@chcaseAlphaCaps[1]{% -% UPPERCASE TO LOWERCASE - \if A#1a\else - \if B#1b\else - \if C#1c\else - \if D#1d\else - \if E#1e\else - \if F#1f\else - \if G#1g\else - \if H#1h\else - \if I#1i\else - \if J#1j\else - \if K#1k\else - \if L#1l\else - \if M#1m\else - \if N#1n\else - \if O#1o\else - \if P#1p\else - \if Q#1q\else - \if R#1r\else - \if S#1s\else - \if T#1t\else - \if U#1u\else - \if V#1v\else - \if W#1w\else - \if X#1x\else - \if Y#1y\else - \if Z#1z\else - \if 0\NumeralTreatment% - \@removeNumerals{#1}% - \else - \@rotateNumerals{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@rotateNumerals[1]{% -% NUMERALS - \if 1#11\else - \if 2#12\else - \if 3#13\else - \if 4#14\else - \if 5#15\else - \if 6#16\else - \if 7#17\else - \if 8#18\else - \if 9#19\else - \if 0#10\else - \if 0\PunctuationTreatment% - \@removePunctuation{#1}% - \else - \@rotatePunctuation{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@removeNumerals[1]{% -% NUMERALS - \if 1#1\else - \if 2#1\else - \if 3#1\else - \if 4#1\else - \if 5#1\else - \if 6#1\else - \if 7#1\else - \if 8#1\else - \if 9#1\else - \if 0#1\else - \if 0\PunctuationTreatment% - \@removePunctuation{#1}% - \else - \@rotatePunctuation{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@rotatePunctuation[1]{% -% PUNCTUATION - \if ;#1;\else - \if :#1:\else - \if '#1'\else - \if "#1"\else - \if ,#1,\else - \if .#1.\else - \if ?#1?\else - \if `#1`\else - \if !#1!\else - \if 0\SymbolTreatment% - \@removeDirectSymbols{#1}% - \else - \@rotateDirectSymbols{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@removePunctuation[1]{% -% PUNCTUATION - \if ;#1\else - \if :#1\else - \if '#1\else - \if "#1\else - \if ,#1\else - \if .#1\else - \if ?#1\else - \if `#1\else - \if !#1\else - \if 0\SymbolTreatment% - \@removeDirectSymbols{#1}% - \else - \@rotateDirectSymbols{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@rotateDirectSymbols[1]{% -% DIRECT SYMBOLS - \if /#1/\else - \if @#1@\else - \if *#1*\else - \if (#1(\else - \if )#1)\else - \if -#1-\else - \if _#1_\else - \if =#1=\else - \if +#1+\else - \if [#1[\else - \if ]#1]\else - \if ^#1^\else% <--FOR SUPERSCRIPTS, NOT \^ - \if <#1<\else - \if >#1>\else - \if |#1|\else - \if &\else - \@rotateUndecipherable{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@removeDirectSymbols[1]{% -% DIRECT SYMBOLS - \if /#1\else - \if @#1\else - \if *#1\else - \if (#1\else - \if )#1\else - \if -#1\else - \if _#1\else - \if =#1\else - \if +#1\else - \if [#1\else - \if ]#1\else - \if ^#1\else% <--FOR SUPERSCRIPTS, NOT \^ - \if <#1\else - \if >#1\else - \if |#1\else - \if \else - \@rotateUndecipherable{#1}% - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi - \fi -} - -\newcommand\@rotateUndecipherable[1]{% -% REPLACE UNDECIPHERABLE SYMBOL WITH A TOKEN CHARACTER (DEFAULT .) - \expandafter\@gobble#1\undecipherable% -% DONE... CLOSE UP SHOP -} -% \end{macrocode} -% \end{macro} - -% \begin{macrocode} -\catcode`\&=4 -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%</package> -% \end{macrocode} -% -% \Finale -\endinput -% -% End of file `stringstrings.dtx'. +% \iffalse
+%<package>\ProvidesPackage{stringstrings}
+%<package>[2020/12/08 v1.24
+%<package> Extensive array of string manipulation routines for
+%<package> cosmetic and programming application]
+%<package>\NeedsTeXFormat{LaTeX2e}
+%<*driver>
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+% http://www.latex-project.org/lppl.txt
+% and version 1.3c or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status `maintained'.
+%
+% The Current Maintainer of this work is Steven B. Segletes.
+%
+% v1.00 -Initial Release
+% v1.01 -Included support for & character, though it loses catcode 4
+% status
+% v1.02 -Bug fix. Needed some % chars in \convertchar to avoid extra spaces
+% v1.03 -Documentation fix; notably removed 's' from \narg in \getargs
+% v1.04 -Removed \rotate command, as it conflicts with environment in
+% \usepackage{rotating}
+% v1.10 -Fixed bug in convertword by adding @@@stringsize definition to
+% \whereisword
+% -Added suite of routines to support \capitalizetitle functionality
+% v1.20 -Added ability to encode/decode arbitrary tokens
+% v1.21 -Added %, removing extra space (bug) from \whereisword
+% v1.22 -Added %, removing extra space (bug) from \getargs
+% v1.23 -Changed {~} to {\ } in \retokenizechar
+% -Forced all stringtest commands to function outside of math mode
+% which will give correct result, when invoked within math mode.
+% V1.24 -Added %, removing extra space (bug) from \testmatchingchar
+\documentclass{ltxdoc}
+\usepackage{stringstrings}
+\DisableCrossrefs
+\CodelineNumbered
+% DEFINE SOME CAMMANDS THAT ARE EASIER HERE THAN IN DocInput ENVIRONMENT
+\newcommand\stringstrings{\textsf{stringstrings}~}
+\newcommand\coolstr{\textsf{coolstr}~}
+% ITALICIZED i.e.,
+\newcommand{\ie}{\textit{i.e.},~}%
+% ITALICIZED e.g.,
+\newcommand{\eg}{\textit{e.g.},~}%
+% ITALICIZED etc.
+\newcommand{\etc}{\textit{etc}.}%
+\def\modetablelayout{|l|c|c|c|}
+\def\mylayout{@{}c|c|l@{}}
+\stringencode{\|}
+\stringdecode[q]{\thestring}
+\edef\mypipe{\thestring}
+\stringencode{\carat}
+\stringdecode[q]{\thestring}
+\edef\mycarat{\thestring}
+
+\GetFileInfo{stringstrings.sty}
+\begin{document}
+ \title{The \stringstrings Package\\
+ \rule{0em}{0.7em}\small\fileinfo}
+ \author{Steven B. Segletes\\
+ steven.b.segletes.civ@mail.mil}
+ \date{\filedate\\
+ \fileversion}
+ \maketitle
+ \DocInput{stringstrings.dtx}
+\end{document}
+%</driver>
+%\fi
+% \parskip 1ex
+% \begin{abstract}
+% The \stringstrings package provides a large and sundry array of routines
+% for the manipulation of strings. The routines are developed not only
+% for cosmetic application, such as the changing of letter
+% cases, selective removal of character classes, and string
+% substitution,
+% but also for programming application, such as character look-ahead
+% applications, argument parsing, |\if|-tests for various string
+% conditions, etc. A key tenet employed during the
+% development of this package (unlike, for comparison, the |\uppercase|
+% and |\lowercase| routines) was to have resultant strings be
+% ``expanded'' (\ie the product of an |\edef|), so that the
+% \stringstrings routines could be strung together sequentially and
+% nested (after a fashion) to achieve very complex manipulations.
+%
+% \end{abstract}
+%
+% \vspace{-.55em}
+% \tableofcontents\rule[.2em]{4.5in}{.3mm}\vspace{-1.5em}
+%
+% \section {Motivation}
+%
+% There were two seminal moments that brought about my motivation to
+% develop this package. The first was the realization of the oft
+% cited and infamous \LaTeX{} limitation concerning the inability to
+% nest letter-case changes with \LaTeX{}'s intrinsic |\uppercase| and
+% |\lowercase| routines. The second,
+% though not diminishing its utility in many useful applications, was
+% the inherent limitations of the \coolstr package, which is otherwise
+% a useful tool for extracting substrings and measuring string lengths.
+%
+% The former is well documented and need not be delved into in great
+% detail. Basically, as it was explained to me, |\uppercase| and
+% |\lowercase| are expanded by \LaTeX{} at the last possible moment, and
+% thus attempts to capture their result for subsequent use are doomed to
+% failure. One is forced to adopt the left-to-right (rather than
+% nested) approach to case changes.
+%
+% In the case of the \coolstr package, I again want to express
+% my admiration for the utility of this package. I briefly considered
+% building the \stringstrings package around it, but it proved
+% unworkable, because of some intrinsic limitations.
+% First, \coolstr operates on
+% strings, not tokens, and so in order to fool it into working on
+% tokenized inputs, one must use the cumbersome nomenclature of
+%
+% |\expandafter\substr\expandafter{\TokenizedString}{...}{...}|
+% \vspace{1ex}\\%
+% in order to, for example grab a substring of |\TokenizedString|. One
+% may |\def| the result of this subroutine, and use it elsewhere in an
+% unaltered state. However, one may not expand, via |\edef|, the
+% result of |\substr| in order to use it as input to a subsequent string
+% manipulation. And thus, the desire to engage in successive string
+% manipulations of different natures (\eg capitalization of leading
+% characters, extraction of words, reversal of character sequence,
+% removal of character classes, etc., etc.) are not achievable in the
+% context of \textsf{coolstr}.
+%
+% It was this state of affairs that brought me to hunger for routines
+% that could thoroughly manipulate strings, and yet produce their result
+% ``in the clear'' (\ie in an untokenized form) which could be used as
+% input for the next manipulation. It turns out the heart of the
+% \stringstrings package which achieves this goal is based on the simple
+% (if much maligned) |\if| construct of \LaTeX{}, by using successive
+% iterations of the following construct:
+%
+% |\if <|\textit{test char.}|><|\textit{string}|><|\textit{manipulated
+% test char.}|>\else ...\fi|
+% \vspace{1ex}\\%
+% in which a character at the begining of a string is tested. If a
+% match is found,
+% the manipulated test character is replaced at the end of the string,
+% while the original test character is lopped off from the beginning of
+% the string. A false result is used to proceed to a different test
+% character. In this manner, the string may be rotated through,
+% character by character, performing the desired manipulations. And,
+% most importantly, the product of this operation may be placed into an
+% |\edef|.
+%
+% It turns out there was one glitch to this process (which has been
+% successfully remedied in the \stringstrings package). And that is that
+% there are several tokenized \LaTeX{} symbols (\eg |\$|, |\{|, |\}|,
+% |\AE|, |\oe|, etc.) which expand to more than a single byte. If
+% I was more savvy on \LaTeX{} constructs, I would probably have known
+% how to handle this better. But my solution was to develop my own
+% encoding scheme wherein these problematic characters were re-encoded
+% in my intermediate calculations as a 2-byte (escape character-escape code)
+% combination, and only converted back into \LaTeX{} symbols at the last
+% moment, as the finalized strings were handed back to the user.
+%
+% There are also several tokens, like |\dag|, |\ddag|, |\P|, |\d|, |\t|,
+% |\b|, and |\copyright| which
+% can not be put into an |\edef| construct. The solution developed for
+% strings containing these such characters was to convert the encoded
+% string not into an expanded |\edef| construct, but rather back into a
+% tokenized form amenable to |\def|. The |\retokenize| command
+% accomplishes this task and several others.
+%
+% There was also one glitch that I have not yet been able to resolve
+% to my full satisfaction, though I have provided a workaround.
+% And that is the occurance of \LaTeX{} grouping characters, |{| and
+% |}|, that might typically occur in math mode. The problem is that the
+% character-rotate technique that is the core of \stringstrings breaks
+% when rotating these group characters. Why?? Because a string
+% comprised of |...{...}...|, during the rotation process, will
+% eventually become |...}......{| during an intermediate stage of
+% character rotation. This
+% latter string breaks \LaTeX{} because it is not a properly constructed
+% grouping, even if subsequent rotations would intend to bring it back
+% into a proper construction.
+%
+% And so, while \stringstrings can handle certain math-mode
+% constructs (\eg |$|, |^|, and |_|), it is unable to {\it directly}
+% handle groupings that are brought about by the use of curly braces.
+% Note that |\{| and |\}| are handled just fine, but not |{| and |}|.
+% As a result of this limitation regarding the use of grouping braces
+% within strings, \stringstrings support for various math symbols
+% remains quite limited.
+%
+% While it is also common to use curly braces to
+% delimit the arguments of diacritcal marks in words like
+% |m\"{u}de| \etc, the same result can be achieved without the
+% use of braces as |m\"ude|, with the proper result obtained: m\"ude.
+% For diacritical marks that have an alphabetic token such as the breve,
+% given by |\u|, the curly braces can also be omitted, with the only
+% change being a space required after the |\u| to delimit the token.
+% Thus, |c\u at| becomes c\u at. Therefore, when manipulating strings
+% containing diacritical marks, it is best to formulate them, if
+% possible, without the use of curly braces.
+%
+% The workaround fix I have developed, to provide grouping functions
+% within \stringstrings arguments, involves the use of newly defined
+% tokens |\LB| and |\RB| (to be used in lieu of |{| and |}|),
+% along with a command |\retokenize|. This
+% workaround will be described subsequently, in the Disclaimers section.
+%
+% \section{Philosophy of Operation}
+%
+% There are several classes of commands that have been developed as part
+% of the \stringstrings package. In addition to {\bf Configuration
+% Commands}, which set parameters for subsequent string operations,
+% there are the following command classes:
+% \begin{itemize}
+% \item {\bf Commands to Manipulate Strings} -- these commands take an
+% input string or token and perform a specific manipulation on the
+% string;
+% \item {\bf Commands to Extract String Information} -- these commands
+% take an input string or token, and ascertain a particular
+% characteristic of the string; and
+% \item {\bf Commands to Test Strings} -- these commands take an input
+% string or token and test for a particular alphanumeric condition.
+% \end{itemize}
+% Of course, there are also {\bf Support Commands} which are low-level
+% routines which provide functionality to the package, which are
+% generally not accessible to the user.
+%
+% To support the intended philosophy that the user may achieve a complex
+% string manipulation though a series of simpler manipulations (which
+% is otherwise known as nesting), a mechanism had to be developed. True
+% command nesting of the form |\commandA{\commandB{\commandC{string}}}|
+% is {\bf not} supported by the \stringstrings package, since many of
+% the manipulation commands make use of (and would thus inadvertantly
+% overwrite) the same sets of variables used by other routines.
+% Furthermore, there is that 'ol left-to-right philosophy of \LaTeX{} to
+% contend with.
+%
+% Instead, for the case of commands that manipulate strings, the expanded
+% (\ie |\edef|'ed) result of the manipulation is placed into a string
+% called |\thestring|\DescribeMacro{\thestring}. Then, |\thestring|
+% may either be directly used
+% as the input to a subsequent operation, or |\edef|'ed into another
+% variable to save it for future use.
+%
+% String manipulation commands use an optional first argument to specify
+% what to do with the manipulated string (in addition to putting it in
+% |\thestring|). Most string manipulation
+% commands default to verbose mode |[v]|\DescribeMacro{[v]}, and print
+% out their result immediately on the assumption that a simple string
+% manipulation is, many times, all that is required. If the user wishes
+% to use the manipulated result as is, but needs to use it later in the
+% document, a quiet mode |[q]| \DescribeMacro{[q]} is provided which
+% suppresses the immediate output of |\thestring|.
+%
+% In the absence of symbol tokens (\eg |\$|, |\&|, |\oe|, |\^|, \etc),
+% the verbose and quiet modes would prove sufficient. However, when a
+% tokenized symbol is |\edef|'ed, the token is expanded to the actual
+% symbolic representation of the character. If this expanded symbol is
+% used as part of an input string to a
+% subsequent \stringstrings manipulation
+% routine, it gets confused, because the means to detect the token are
+% characteristically different than the means to detect the expanded
+% symbol. Thus, if one wishes to use |\thestring| as an input to a
+% subsequent manipulation routine, \stringstrings provides an encoded
+% mode |[e]| \DescribeMacro{[e]} which places an encoded version of the
+% resulting manipulation into
+% |\thestring|. The encoded mode is also a quiet mode, since it leaves
+% |\thestring| in a visually unappealing state that is intended for
+% subsequent manipulation.
+%
+% The encoded mode is not a \LaTeX{} standard,
+% but was developed for this application. And therefore, if the result
+% of a \stringstrings manipulation is needed as input for a routine
+% outside of the \stringstrings package, the encoded mode will be of no
+% use. For this reason (and others),
+% the |\retokenize| \DescribeMacro{\retokenize}
+% command is provided. Its use is one of only three times that a
+% \stringstrings command
+% returns a tokenized |\def|'ed string in |\thestring|, rather than an
+% expanded, |\edef|'ed string. And in the other two cases, both
+% call upon |\retokenize|.
+%
+% In addition to providing tokenized strings that can be passed to other
+% \LaTeX{} packages, |\retokenize| can also remedy \stringstrings problems
+% associated with inadequate character encodings (OT1) and the use of
+% grouping characters |{| and |}| within \stringstrings arguments. This
+% issue is discussed more fully in the Disclaimers section, and in the
+% actual |\retokenize| command description.
+%
+% Therefore, for complex multistage string manipulations, the
+% recommended procedure
+% is to perform each stage of the manipulation in encoded |[e]| mode,
+% passing along |\thestring| to each subsequent stage of the
+% manipulation, until the very last manipulation, which should be,
+% at the last, performed in verbose |[v]| or quiet |[q]| modes. If
+% the resulting manipulation is to be passed to a command outside of the
+% \stringstrings package for further manipulation (or if the string
+% contains characters which cannot be placed into an |\edef|),
+% |\thestring| may
+% need to be |\retokenize|'ed. If concatenations of two (or more) different
+% manipulations are to be used as input to a third manipulation,
+% |\thestring| from the first manipulation will need to be immediately
+% |\edef|'ed into a different variable, since |\thestring| will be
+% overwritten by the second manipulation (see Table~\ref{tbl:modes}
+% for summary).
+% \begin{table}[h]
+% \begin{center}
+% \caption{\bf Execution Modes of \stringstrings Commands
+% \label{tbl:modes}}\vspace{0.5em}
+% \small
+% \begin{tabular}\modetablelayout
+% \hline
+% Mode & Coding & Use when result is & |\thestring| is\\
+% \hline
+% \hline
+% |[v]| verbose & decoded or retokenized & final & echoed \\
+% |[q]| quiet & decoded or retokenized & final & not echoed \\
+% |[e]| encoded & encoded & intermediate & not echoed \\
+% \hline
+% \end{tabular}
+% \end{center}
+% \end{table}
+%
+% Moving on to commands that extract string information, this class of
+% commands (unless otherwise noted) output their result into a token
+% which is given the name |\theresult|\DescribeMacro{\theresult}.
+% This token does not contain a manipulated form of the string, but
+% rather a piece of information about the string, such as ``how many
+% characters are in the string?'', ``how many words are in the string?'',
+% ``how many letter `e's are in the string?'', \etc
+%
+% The final class of \stringstrings commands are the string-test
+% commands. While some of this class of commands also store their
+% test result in |\theresult|, most of these commands use the
+% |\test|{\it condition}|{|{\it string}|}| |\if|{\it
+% condition} constructs (see {\sf ifthen} package) to answer true/false
+% questions like ``is the string composed entirely of lowercase
+% characters?'', ``is the string's first letter capitalized?'' \etc
+%
+% \section {Configuration Commands}
+%
+% \noindent%
+% |\Treatments{|{\it U-mode}|}{|{\it l-mode}|}{|{\it p-mode}|}{|{\it%
+% n-mode}|}{|{\it s-mode}|}{|{\it b-mode}|}|\\
+% |\defaultTreatments|\\
+% |\encodetoken[|{\it index}|]{|{\it token}|}|\\
+% |\decodetoken[|{\it index}|]{|{\it token}|}|\\
+% |\+|\\
+% |\?|
+%
+% The command |\Treatments| \DescribeMacro{\Treatments}
+% is used to define how different classes of
+% characters are to be treated by the command |\substring|, which is the
+% brains of the \stringstrings package. As will be explained in the
+% next section, most string manipulation routines end up calling
+% |\substring|, the difference between them being a matter of how these
+% character treatments are set prior to the call.
+% Because most string manipulation
+% commands will set the treatments as necessary to perform their given
+% task, and reset them to the default upon conclusion, one should set
+% the |\Treatments| immediately prior to the call upon |\substring|.
+%
+% |\Treatments| has six arguments, that define the mode of treatment
+% for the six classes of characters that \stringstrings has designated.
+% All modes are one-digit integers. They are described below:
+% \begin{itemize}
+% \item{\it U-mode---} This mode defines the
+% treatment for the upper-case characters (A--Z, \OE, \AE, \AA, \O, and
+% \L).
+% A mode of 0 tells |\substring| to remove upper-case characters, a
+% mode of 1 indicates to leave upper-case characters alone, and
+% a mode of 2 indicates to change the case of upper-case
+% characters to lower case.
+%
+% \item {\it l-mode---} This mode defines the
+% treatment for the lower-case characters (a--z, \oe, \ae, \aa, \o, \l,
+% and \ss).
+% A mode of 0 tells |\substring| to remove lower-case characters, a
+% mode of 1 indicates to leave lower-case characters alone, and
+% a mode of 2 indicates to change the case of lower-case
+% characters to upper case. In the case of the eszett character (\ss),
+% there is no uppercase equivalent, and so an {\it l-mode} of 2 will
+% leave the eszett unchanged.
+%
+% \item {\it p-mode---} This mode defines the
+% treatment for the punctuation characters. \stringstrings
+% defines the punctuation characters as ; : ' " , . ? ` and ! A mode of
+% 0 tells |\substring| to remove punctuation characters, while a mode of
+% 1 indicates to leave punctuation characters as is.
+%
+% \item {\it n-mode---} This mode defines the
+% treatment for the numerals (0--9). A mode of
+% 0 tells |\substring| to remove numerals, while a mode of
+% 1 indicates to leave numerals as is.
+%
+% \item {\it s-mode---} This mode defines the
+% treatment for the symbols. \stringstrings
+% defines symbols as the following characters and diacritical marks:
+% \substring{/ * ( ) - = + [ ] $<$ $>$}{1}{$} \& |\& \% \# \{ \} \_ \$|
+% \dag~\ddag~\S~\P~\L~\pounds~\copyright~\v x \^x \~x \"x \`x \'x \=x
+% \.x \u x \v x
+% \H x \c x \d x \t{xx} \b x as well as |@|, math and text carats,
+% and the pipe symbol. A mode of
+% 0 tells |\substring| to remove symbols, while a mode of
+% 1 indicates to leave symbols as is. Note that the \$ symbol, when
+% used for entering and exiting math mode, is left intact, regardless of
+% {\it s-mode}.
+%
+% % \item {\it b-mode---} This mode defines the
+% treatment for blankspaces. A mode of
+% 0 tells |\substring| to remove blankspaces, while a mode of
+% 1 indicates to leave blankspaces as is. The treatment apples to both
+% soft (~) as well as hard (|~|) spaces.
+% \end{itemize}
+%
+% The command |\defaultTreatments| \DescribeMacro{\defaultTreatments}
+% resets all treatment modes to their default settings, which are to
+% leave individual characters unaltered by a string manipulation.
+%
+% The commands |\encodetoken| \DescribeMacro{\encodetoken} and
+% |\decodetoken| \DescribeMacro{\decodetoken} have been introduced in
+% \stringstrings v1.20. Prior to this version, the ability of
+% \stringstrings to handle a particular token was dependent on whether
+% provisions for encoding that token had been explicitly hardwired into
+% the \stringstrings package. A large number of alphabetic and
+% diacritical marks had reserved encodings set aside in \stringstrings
+% for their treatment (see next paragraph or Table 2 for their enumeration).
+% However, requests would invariable come in for treating yet another
+% token, which required a new \stringstrings release for each revision.
+% The command |\encodetoken| allows the user to specify an arbitrary
+% token, to be assigned to the reserved encoding slot associated with the
+% index (permissible indices are in the range 1--3, 1 being the default).
+% Once assigned an encoding slot, a token may be successfully manipulated in
+% \stringstrings routines. Once \stringstrings manipulation is
+% complete, the token must undergo a |\decodetoken| operation in order
+% for that token to be reset to a normal \LaTeX{} token again (lest it
+% display in its encoded \stringstrings form).
+%
+% The commands |\+| and |\?| \DescribeMacro{\+}\DescribeMacro{\?}
+% are a pair that work in tandem to turn on \stringstrings encoding and
+% turn off \stringstrings encoding, respectively. Generally, the user
+% will not need these commands unless he is writing his own routines to
+% take advantage of the \stringstrings library. After |\+| is called,
+% tokens which would otherwise expand to multi-byte sequences are
+% instead encoded according to the \stringstrings methodology. The
+% affected tokens
+% include
+% |\$ \^ \" \{ \} \_ \dag \ddag \P \S \ss \AA \aa \O \o \AE \ae|
+% |\OE|, |\oe|, |\~|, |\`|, |\'|, |\=|, |\.|, |\u|, |\v|, |\H|, |\c|,
+% |\d|, |\t|, |\b|, |\copyright|, |\pounds|, |\L|, |\l|, and |\ss|. In
+% addition, pipes, text carats, and hard spaces (|~|) are encoded
+% as well. The command |\?| restores the
+% standard \LaTeX{} encoding for these tokens.
+%
+% \section {Commands to Manipulate Strings}
+%
+% These commands take an
+% input string or token and perform a specific manipulation on the
+% string. They include:
+%
+% \noindent|\substring[|{\it mode}|]{|{\it
+% string}|}{|{\it min}|}{|{\it max}|}|\\
+% |\caseupper[|{\it mode}|]{|{\it string}|}|\\
+% |\caselower[|{\it mode}|]{|{\it string}|}|\\
+% |\solelyuppercase[|{\it mode}|]{|{\it string}|}|\\
+% |\solelylowercase[|{\it mode}|]{|{\it string}|}|\\
+% |\changecase[|{\it mode}|]{|{\it string}|}|\\
+% |\noblanks[|{\it mode}|]{|{\it string}|}|\\
+% |\nosymbolsnumerals[|{\it mode}|]{|{\it string}|}|\\
+% |\alphabetic[|{\it mode}|]{|{\it string}|}|\\
+% |\capitalize[|{\it mode}|]{|{\it string}|}|\\
+% |\capitalizewords[|{\it mode}|]{|{\it string}|}|\\
+% |\capitalizetitle[|{\it mode}|]{|{\it string}|}|\\
+% |\addlcword{|{\it word}|}|\\
+% |\addlcwords{|{\it word1 word2 word3 \ldots}|}|\\
+% |\resetlcwords|\\
+% |\reversestring[|{\it mode}|]{|{\it string}|}|\\
+% |\convertchar[|{\it mode}|]{|{\it
+% string}|}{|{\it from-char}|}{|{\it to-string}|}|\\
+% |\convertword[|{\it mode}|]{|{\it
+% string}|}{|{\it from-string}|}{|{\it to-string}|}|\\
+% |\rotateword[|{\it mode}|]{|{\it string}|}|\\
+% |\removeword[|{\it mode}|]{|{\it string}|}|\\
+% |\getnextword[|{\it mode}|]{|{\it string}|}|\\
+% |\getaword[|{\it mode}|]{|{\it string}|}{|{\it n}|}|\\
+% |\rotateleadingspaces[|{\it mode}|]{|{\it string}|}|\\
+% |\removeleadingspaces[|{\it mode}|]{|{\it string}|}|\\
+% |\stringencode[|{\it mode}|]{|{\it string}|}|\\
+% |\stringdecode[|{\it mode}|]{|{\it string}|}|\\
+% |\gobblechar[|{\it mode}|]{|{\it string}|}|\\
+% |\gobblechars[|{\it mode}|]{|{\it string}|}{|{\it n}|}|\\
+% |\retokenize[|{\it mode}|]{|{\it string}|}|
+%
+% \noindent
+% Unless otherwise noted, the {\it mode} may take one of three values:
+% |[v]| for verbose mode (generally, the default), |[q]| for quiet mode,
+% and |[e]| for encoded mode. In all cases, the result of
+% the operation is stored in |\thestring|. In verbose mode, it is also
+% output immediately (and may be captured by an |\edef|). In quiet mode,
+% no string is output, though the result still resides in |\thestring|.
+% Encoded mode is also a quiet mode. However, the encoded mode saves
+% the string with its \stringstrings encodings. Encoded mode indicates
+% that the result is an intermediate result which will be subsequently
+% used as input to another \stringstrings manipulation.
+%
+% The command |\substring| \DescribeMacro{\substring} is the brains of
+% the \stringstrings package, in that most of the commands in this
+% section call upon |\substring| in one form or another. Nominally, the
+% routine returns a substring of {\it string} between the characters
+% defined by the integers {\it min} and {\it max}, inclusive.
+% However, the returned substring is
+% affected by the designated |\Treatments| which have been defined
+% for various classes of characters. Additionally, a shorthand of \$
+% may be used in {\it min} and {\it max} to define END-OF-STRING, and
+% the shorthand \$--{\it integer} may be used to define an offset of
+% {\it integer} relative to the END-OF-STRING.
+%
+% Regardless of how many bytes a \LaTeX{} token otherwise expands
+% to, or how many characters are in the token name, each \LaTeX{}
+% symbol token
+% counts as a single character for the purposes of defining the
+% substring limits, {\it min} and {\it max}.
+%
+% While the combination of |\Treatments| and |\substring| are sufficient
+% to achieve a wide array of character manipulations, many of those
+% possibilities are useful enough that separate commands have been
+% created to describe them, for convenience. Several of the commands
+% that follow fall into this category.
+%
+% The command |\caseupper| \DescribeMacro{\caseupper} takes the input
+% string or token, and converts all lowercase characters in the string
+% to uppercase. All other character classes are left untouched.
+% Default mode is |[v]|.
+%
+% The command |\caselower| \DescribeMacro{\caselower} takes the input
+% string or token, and converts all uppercase characters in the string
+% to lowercase. All other character classes are left untouched.
+% Default mode is |[v]|.
+%
+% The command |\solelyuppercase| \DescribeMacro{\solelyuppercase} is
+% similar to |\caseupper|, except that all punctuation, numerals, and
+% symbols are discarded from the string. Blankspaces are left alone,
+% and lowercase characters are converted to uppercase.
+% Default mode is |[v]|.
+%
+% The command |\solelylowercase| \DescribeMacro{\solelylowercase} is
+% similar to |\caselower|, except that all punctuation, numerals, and
+% symbols are discarded from the string. Blankspaces are left alone,
+% and uppercase characters are converted to lowercase.
+% Default mode is |[v]|.
+%
+% The command |\changecase| \DescribeMacro{\changecase} switches lower
+% case to upper case and upper case to lower case. All other characters
+% are left unchanged.
+% Default mode is |[v]|.
+%
+% The command |\noblanks| \DescribeMacro{\noblanks} removes blankspaces
+% (both hard and soft) from
+% a string, while leaving other characters unchanged.
+% Default mode is |[v]|.
+%
+% The command |\nosymbolsnumerals| \DescribeMacro{\nosymbolsnumerals}
+% removes symbols and numerals from
+% a string, while leaving other characters unchanged.
+% Default mode is |[v]|.
+%
+% The command |\alphabetic| \DescribeMacro{\alphabetic} discards
+% punctuation, symbols, and numerals, while retaining alphabetic
+% characters and blankspaces.
+% Default mode is |[v]|.
+%
+% The command |\capitalize| \DescribeMacro{\capitalize} turns the first
+% character of {\it string} into its upper case, if it is alphabetic.
+% Otherwise, that character will remain unaltered.
+% Default mode is |[v]|.
+%
+% The command |\capitalizewords| \DescribeMacro{\capitalizewords} turns
+% the first character of every word in {\it string} into its upper
+% case, if it is alphabetic.
+% Otherwise, that character will remain unaltered. For the purposes of
+% this command, ``the first character of a word'' is defined as either
+% the first character of the string, or the first non-blank
+% character that follows one or more blankspaces.
+% Default mode is |[v]|.
+%
+% The command |\capitalizetitle| \DescribeMacro{\capitalizetitle} is a
+% command similar to |\capitalizewords|, except that words which have
+% been previously designated as ``lower-case words'' are not
+% capitalized (\eg prepositions, conjunctions, \etc). In all cases,
+% the first word of the string is
+% capitalized, even if it is on the lower-case word list. Words are
+% added to the lower-case word list with the commands
+% |\addlcword|\DescribeMacro{\addlcword}, in the case of a single word,
+% or with |\addlcwords|\DescribeMacro{\addlcwords}, in the case of
+% multiple (space-separated) words. Because the addition of many words
+% to the lower-case list can substantially slow-down the execution of
+% the |\capitalizetitle| command, the command
+% |\resetlcwords| \DescribeMacro{\resetlcwords} has been added to
+% allow the user to zero out the lower-case word list.
+% (See newer \textsf{titlecaps} package as an alternative to this
+% command.)
+%
+% The command |\reversestring| \DescribeMacro{\reversestring} reverses
+% the sequence of characters in a string, such that what started as
+% the first character becomes the last character in the manipulated
+% string, and what started as the last character becomes the
+% first character.
+% Default mode is |[v]|.
+%
+% The command |\convertchar| \DescribeMacro{\convertchar} is a substitution
+% command in which a specified match character in the original string
+% ({\it from-char}) is substituted with a different string ({\it
+% to-string}). All occurances of {\it from-char} in the original
+% string are replaced. The {\it from-char} can only be a single
+% character (or tokenized symbol), whereas {\it to-string} can range
+% from the null-string (\ie character removal) to a single character
+% (\ie character substitution)
+% to a complete multi-character string.
+% Default mode is |[v]|.
+%
+% The command |\convertword| \DescribeMacro{\convertword} is a substitution
+% command in which a specified match string in the original string
+% ({\it from-string}) is substituted with a different string ({\it
+% to-string}). All occurances of {\it from-string} in the original
+% string are replaced. If {\it from-string} includes spaces, use
+% hard-space |(~)| characters instead of blanks.
+% Default mode is |[v]|.
+%
+% The command |\rotateword| \DescribeMacro{\rotateword} takes the first
+% word of {\it string} (and its leading and trailing spaces)
+% and rotates them to the end of the string.
+% Care must be taken to have a blankspace at the beginning or end
+% of {\it string} if one wishes to retain a blankspace word
+% separator between the original last word of the string and the
+% original first word which has been rotated to the end of the string.
+% Default mode is |[v]|.
+%
+% The command |\removeword| \DescribeMacro{\removeword} removes the
+% first word of {\it string}, along with any of its leading and trailing
+% spaces.
+% Default mode is |[v]|.
+%
+% The command |\getnextword| \DescribeMacro{\getnextword} returns the
+% next word of {\it string}. In this case, ``word'' is a sequence of
+% characters delimited either by spaces or by the beginning or end
+% of the string.
+% Default mode is |[v]|.
+%
+% The command |\getaword| \DescribeMacro{\getaword} returns a
+% word of {\it string} defined by the index, {\it n}.
+% In this case, ``word'' is a sequence of
+% characters delimited either by spaces or by the first or last
+% characters of the string. If the index, {\it n}, requested exceeds the
+% number of words available in the string, the index wraps around back
+% to the first argument of the string, such that asking for the tenth word
+% of an eight word string will return the second word of the string.
+% Default mode is |[v]|.
+%
+% The command |\rotateleadingspaces|
+% \DescribeMacro{\rotateleadingspaces} takes any leading spaces of the
+% string and rotates them to the end of the string.
+% Default mode is |[v]|.
+%
+% The command |\removeleadingspaces|
+% \DescribeMacro{\removeleadingspaces} removes any leading spaces of the
+% string.
+% Default mode is |[v]|.
+%
+% The command |\stringencode| \DescribeMacro{\stringencode} returns a
+% copy of the string that has been encoded according to the
+% \stringstrings encoding scheme. Because an encoded string is an
+% intermediate result, the default mode for this command is |[e]|.
+%
+% The command |\stringdecode| \DescribeMacro{\stringdecode} returns a
+% copy of the string that has been decoded.
+% Default mode is |[v]|.
+%
+% The command |\gobblechar| \DescribeMacro{\gobblechar} returns a string
+% in which the first character of {\it string} has been removed. Unlike
+% the \LaTeX{} system command |\@gobble| which removes the next {\bf
+% byte} in
+% the input stream, |\gobblechar| not only takes an argument as the
+% target of its gobble, but also removes one {\bf character}, regardless
+% of whether that character is a single-byte or multi-byte character.
+% Because this command may have utility outside of the \stringstrings
+% environment, the result of this command is retokenized (\ie |def|'ed)
+% rather than expanded (\ie |edef|'ed).
+% Default mode is |[q]|. Mode |[e]| is not recognized.
+%
+% The command |\gobblechars| \DescribeMacro{\gobblechars} returns a string
+% in which the first {\it n} characters of {\it string} have been removed.
+% Like |\gobblechar|, |\gobblechars| removes characters, regardless
+% of whether those characters are single-byte or multi-byte characters.
+% Likewise, the result of this command is retokenized (\ie |def|'ed)
+% rather than expanded (\ie |edef|'ed).
+% Default mode is |[q]|. Mode |[e]| is not recognized.
+%
+% The command |\retokenize| \DescribeMacro{\retokenize} takes a string
+% that is encoded according to the \stringstrings encoding scheme, and
+% repopulates the encoded characters with their \LaTeX{} tokens. This
+% command is particularly useful for exporting a string to a routine
+% outside of the \stringstrings library or if the string includes
+% the following
+% characters: |\{|, |\}|, \verb,\|,, |\dag|, |\ddag|, |\d|, |\t|, |\b|,
+% |\copyright|, and |\P|.
+% Default mode is |[q]|. Mode |[e]| is not recognized.
+%
+% \section {Commands to Extract String Information}
+%
+% These commands
+% take an input string or token, and ascertain a particular
+% characteristic of the string. They include:
+%
+% \noindent|\stringlength[|{\it mode}|]{|{\it string}|}|\\
+% |\findchars[|{\it mode}|]{|{\it string}|}{|{\it match-char}|}|\\
+% |\findwords[|{\it mode}|]{|{\it string}|}{|{\it match-string}|}|\\
+% |\whereischar[|{\it mode}|]{|{\it string}|}{|{\it match-char}|}|\\
+% |\whereisword[|{\it mode}|]{|{\it string}|}{|{\it match-string}|}|\\
+% |\wordcount[|{\it mode}|]{|{\it string}|}|\\
+% |\getargs[|{\it mode}|]{|{\it string}|}|
+%
+% \noindent Commands in this section return their result in the string
+% |\theresult|, unless otherwise specified.
+% Unless otherwise noted, the {\it mode} may take one of two values:
+% |[v]| for verbose mode (generally, the default), and |[q]| for quiet
+% mode. In both cases, the result of
+% the operation is stored in |\theresult|. In verbose mode, it is also
+% output immediately (and may be captured by an |\edef|). In quiet mode,
+% no string is output, though the result still resides in |\theresult|.
+%
+% The command |\stringlength| \DescribeMacro{\stringlength} returns the
+% length of {\it string} in characters (not bytes).
+% Default mode is |[v]|.
+%
+% The command |\findchars| \DescribeMacro{\findchars} checks to see if
+% the character {\it match-char} occurs anywhere in {\it string}. The
+% number of occurances is stored in |\theresult| and, if in verbose
+% mode, printed. If it is desired to find blankspaces, {\it match-char}
+% should be set to |{~}| and not |{ }|.
+% Default mode is |[v]|.
+%
+% The command |\findwords| \DescribeMacro{\findwords} checks to see if
+% the string {\it match-string} occurs anywhere in {\it string}. The
+% number of occurances is stored in |\theresult| and, if in verbose
+% mode, printed. If it is desired to find blankspaces, those
+% characters in {\it match-string}
+% should be set to hardspaces (\ie tildes) and not softspaces (\ie
+% blanks), regardless of how they are defined in {\it string}.
+% Default mode is |[v]|.
+%
+% The command |\whereischar| \DescribeMacro{\whereischar} checks to see
+% where
+% the character {\it match-char} first occurs in {\it string}. The
+% location of that occurance is stored in |\theresult| and, if in verbose
+% mode, printed. If the character is not found, |\theresult| is set to
+% a value of 0. If it is desired to find blankspaces, {\it match-char}
+% should be set to |{~}| and not |{ }|.
+% Default mode is |[v]|.
+%
+% The command |\whereisword| \DescribeMacro{\whereisword} checks to see
+% where
+% the string {\it match-string} first occurs in {\it string}. The
+% location of that occurance is stored in |\theresult| and, if in verbose
+% mode, printed. If {\it match-string} is not found, |\theresult| is set to
+% a value of 0. If it is desired to find blankspaces, those characters
+% in {\it match-string}
+% should be set to hardspaces (\ie tildes) and not softspaces (\ie
+% blanks), regardless of how they are defined in {\it string}.
+% Default mode is |[v]|.
+%
+% The command |\wordcount| \DescribeMacro{\wordcount} counts the number
+% of space-separated words that occur in {\it string}.
+% Default mode is |[v]|.
+%
+% The command |\getargs| \DescribeMacro{\getargs} mimics the Unix
+% command of the same name, in that it parses {\it string} to determine
+% how many arguments (\ie words) are in {\it string}, and extracts
+% each word into a separate variable. The number of arguments is placed
+% in |\narg| and the individual arguments are placed in variables of
+% the name |\argi|, |\argii|, |\argiii|, |\argiv|, etc. This command
+% may be used to facilitate simply the use of multiple optional
+% arguments in a \LaTeX{} command, for example
+% |\mycommand[|{\it option1 option2 option3}|]{|{\it argument}|}|.
+% In this case,
+% |\mycommand| should exercise |\getargs{#1}|, with the result being
+% that {\it option1} is stored in |\argi|, \etc~The command |\mycommand|
+% may then proceed to parse the optional arguments and branch
+% accordingly.
+% Default mode is |[q]|; |[e]| mode is permitted, while |[v]| mode
+% is disabled.
+%
+% \section {Commands to Test Strings}
+%
+% These commands take an input
+% string or token and test for a particular alphanumeric condition.
+% They include:
+%
+% \noindent%
+% |\isnextbyte[|{\it mode}|]{|{\it match-byte}|}{|{\it string}|}|\\
+% |\testmatchingchar{|{\it
+% string}|}{|{\it n}|}{|{\it match-char}|}|\\
+% |\testcapitalized{|{\it string}|}|\\
+% |\testuncapitalized{|{\it string}|}|\\
+% |\testleadingalpha{|{\it string}|}|\\
+% |\testuppercase{|{\it string}|}|\\
+% |\testsolelyuppercase{|{\it string}|}|\\
+% |\testlowercase{|{\it string}|}|\\
+% |\testsolelylowercase{|{\it string}|}|\\
+% |\testalphabetic{|{\it string}|}|
+%
+% The command |\isnextbyte| \DescribeMacro{\isnextbyte} tests to see if
+% the first byte of {\it string} equals {\it match-byte}. It
+% is the only string-testing command in
+% this section which does not use the {\sf ifthen} test structure for
+% its result. Rather, |\isnextbyte| returns the result of its test as
+% a |T| or |F| in the string |\theresult|. More importantly, and
+% unlike other \stringstrings commands, |\isnextbyte| is a {\it byte} test
+% and not a {\it character} test. This means that, while |\isnextbyte|
+% operates very efficiently, it cannot
+% be used to directly detect multi-byte characters like |\$|,
+% |\^|, |\{|, |\}|, |\_|, |\dag|, |\ddag|, |\AE|, |\ae|, |\OE|,
+% |\oe|, \etc~(|\isnextbyte| will give false positives or negatives
+% when testing for these multi-byte characters).
+% The default mode of |\isnextbyte| is |[v]|.
+%
+% If a character needs to be tested, rather than a byte,
+% \DescribeMacro{\testmatchingchar} |\testmatchingchar| should be used.
+% The command |\testmatchingchar| is
+% used to ascertain whether character {\it n} of {\it string} equals
+% {\it match-char} or not. Whereas |\isnextbyte| checks only a {\it
+% byte}, |\testmatchingchar| tests for a {\it character} (single- or
+% multi-byte character). After the test is called, the action(s) may be
+% called out with |\ifmatchingchar| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testcapitalized| \DescribeMacro{\testcapitalized} is
+% used to ascertain whether the first character of {\it string} is
+% capitalized or not. If the first character is non-alphabetic, the
+% test will return FALSE. After the test is called, the action(s) may be
+% called out with |\ifcapitalized| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testuncapitalized| \DescribeMacro{\testuncapitalized} is
+% used to ascertain whether the first character of {\it string} is
+% uncapitalized. If the first character is non-alphabetic, the
+% test will return FALSE. After the test is called, the action(s) may be
+% called out with |\ifuncapitalized| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testleadingalpha| \DescribeMacro{\testleadingalpha} is
+% used to ascertain whether the first character of {\it string} is
+% alphabetic. After the test is called, the action(s) may be
+% called out with |\ifleadingalpha| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testuppercase| \DescribeMacro{\testuppercase} is
+% used to ascertain whether all the alphabetic characters in {\it
+% string} are uppercase or not. The presence of non-alphabetic
+% characters in {\it string} does not falsify the test,
+% but are merely ignored. However, a string completely void of
+% alphabetic characters will always test FALSE.
+% After the test is called, the action(s) may be
+% called out with |\ifuppercase| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testsolelyuppercase|
+% \DescribeMacro{\testsolelyuppercase} is
+% used to ascertain whether {\it all} the characters in {\it
+% string} are uppercase or not. The presence of non-alphabetic
+% characters in {\it string} other than blankspaces will automatically
+% falsify the test. Blankspaces are ignored. However, a null string or
+% a string composed solely of blankspaces will also test FALSE.
+% After the test is called, the action(s) may be
+% called out with |\ifsolelyuppercase| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testlowercase| \DescribeMacro{\testlowercase} is
+% used to ascertain whether all the alphabetic characters in {\it
+% string} are lowercase or not. The presence of non-alphabetic
+% characters in {\it string} does not falsify the test,
+% but are merely ignored. However, a string completely void of
+% alphabetic characters will always test FALSE.
+% After the test is called, the action(s) may be
+% called out with |\iflowercase| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testsolelylowercase|
+% \DescribeMacro{\testsolelylowercase} is
+% used to ascertain whether {\it all} the characters in {\it
+% string} are lowercase or not. The presence of non-alphabetic
+% characters in {\it string} other than blankspaces will automatically
+% falsify the test. Blankspaces are ignored. However, a null string or
+% a string composed solely of blankspaces will also test FALSE.
+% After the test is called, the action(s) may be
+% called out with |\ifsolelylowercase| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% The command |\testalphabetic|
+% \DescribeMacro{\testalphabetic} is
+% used to ascertain whether {\it all} the characters in {\it
+% string} are alphabetic or not. The presence of non-alphabetic
+% characters in {\it string} other than blankspaces will automatically
+% falsify the test. Blankspaces are ignored. However, a null string or
+% a string composed solely of blankspaces will also test FALSE.
+% After the test is called, the action(s) may be
+% called out with |\ifalphabetic| {\it true-code} |\else| {\it
+% false-code} |\fi|.
+%
+% \section{Disclaimers}
+%
+% Now that we have described the commands available in the
+% \stringstrings package, it is appropriate to lay out the quirks and
+% warnings associated with the use of the package.
+%
+% First, \stringstrings is currently set to handle a string no larger
+% than 500 characters. A user could circumvent this, presumably, by
+% editing the style package to increase the value of
+% |\@MAXSTRINGSIZE| \DescribeMacro{\@MAXSTRINGSIZE}.
+%
+% It is important to remember that \stringstrings follows the underlying
+% rules of \LaTeX{}. Therefore, a passed string could not contain a raw
+% |%| as part of it, because it would, in fact, comment out the
+% remainder of the line. Naturally, the string may freely contain
+% instances of |\%|.
+%
+% Tokens that take two or more characters to express
+% (\eg |\#|, |\oe|, |\ddag|, \etc) are {\bf counted as
+% a single character} within the string.
+% The rule applies if you wanted to know the length
+% of a string that was populated with such tokens, or wanted to extract
+% a substring from a such a string. Of course, the exception that makes
+% the rule is that of diacritical marks, which count as separate symbols
+% from the characters they mark. For example,
+% |\^a| counts as two characters, because the |a| is
+% really just the operand of the |\^| token, even though the net result
+% looks like a single character (\^a).
+%
+% Consistent with
+% \LaTeX{} convention, groups of spaces are treated as a single
+% blankspace, unless encoded with |~| characters. And finally, again
+% consistent with the way \LaTeX{} operates, the space
+% that follows an alphabetic token is not actually a space in the
+% string, but serves as the delimiter to the token. Therefore,
+% |\OE dipus| (\OE dipus) has a length of six characters,
+% one for the |\OE| and five
+% for the |dipus|. The intervening space merely closes out the |\OE|
+% token, and does not represent a space in the middle of the string.
+%
+% One quirk worthy of particular note concerns the tabbing character,
+% meaning \&
+% as opposed to |\&| (which is handled without problem).
+% As of version 1.01, \stringstrings has the
+% capability to operate on arguments containg the ampersand \&,
+% normally reserved as the \LaTeX{} tabbing character. However, one
+% adverse by-product is that \& characters returned in |\thestring|
+% lose their catcode-4 value, and thus lose their ability to function as
+% tabbing characters. In the following example,\\
+% | |\\
+% | \caseupper[q]{a & b & c & d}|\\
+% | \begin{tabular}{|\verb,|l|c|c|c|,|}|\\
+% | \hline|\\
+% | \thestring\\|\\
+% | \hline|\\
+% | \end{tabular}|\\
+% | |\\
+% will produce \caseupper[q]{a & b & c & d}
+% \begin{tabular}{\modetablelayout}
+% \hline
+% \thestring\\
+% \hline
+% \end{tabular}
+% instead of the desired
+% \begin{tabular}{\modetablelayout}
+% \hline
+% A & B & C & D\\
+% \hline
+% \end{tabular}
+% .
+%
+% In the |\substring| command, no tests are performed to guarantee that
+% the lower limit, {\it min}, is less than the upper limit, {\it max},
+% or that {\it min} is even positive. However, the upper limit,
+% {\it max}, is corrected, if set larger than the string length. Also,
+% the use of the `\$' symbol to signify the last character of the string
+% and `\$--{\it n}' to denote an offset of {\it n} characters from the
+% end of the string can be helpful in avoiding the misindexing of strings.
+%
+% \begin{table}[p]
+% \caption{\bf Problematic Characters/Tokens and \stringstrings Solutions%
+% \label{tbl:prob}}\vspace{.5em}
+% \small
+% \begin{tabular}{\mylayout}
+% \LaTeX{} & Symbol/Name & Problem/Solution\\
+% \hline
+% \hline
+% |{| & begin group & Cannot use |{| and |}| in \stringstrings
+% arguments.\\
+% |}| & end group & However, use |\LB|\ldots|\RB| in lieu of |{|\ldots|}|;\\
+% & & manipulate string in |[e]| mode \& |\retokenize| \\
+% \hline
+% |\dag| & \dag~~Dagger & Cannot |\edef| these tokens; Thus, |[v]| mode\\
+% |\ddag| & \ddag~~Double Dagger & fails with both OT1 and T1 encoding; \\
+% |\P| & \P~~Pilcrow & manipulate string in |[e]| mode \& |\retokenize| \\
+% |\d| & \d x~~Underdot & \\
+% |\t| & \t xx~~Joining Arch & \\
+% |\b| & \b x~~Letter Underline & \\
+% |\copyright| & \copyright~Copyright & \\
+% \hline
+% \hline
+% |\_| & \_~~Underscore & Cannot |\edef| with OT1 encoding; either\\
+% |\{| & \{~~Left Curly Brace & |\renewcommand\encodingdefault{T1}|, or \\
+% |\}| & \}~~Right Curly Brace &
+% manipulate string in |[e]| mode \& |\retokenize|. \\
+% |\S| & \S~~Section Symbol & With OT1, |\S|, |\c| and |\pounds| break\\
+% |\c| & \c x~~Cedilla & \stringstrings |[v]| mode.\\
+% |\pounds| & \pounds~~Pounds & \\
+% \hline
+% \verb,\|,& \stringstrings Pipe Char. & Distinct from \verb,|,,
+% the \stringstrings encoded-\\
+% & \verb,|, (T1) ~~~\stringdecode{\|} (OT1) & escape character\\
+% \hline
+% \hline
+% |\$| & \$~~Dollar & Either cannot |\edef|, or\\
+% |\carat| & \mycarat~~(text mode) &
+% cannot identify uniquely with |\if| construct, or \\
+% |\^| & \^x~~Circumflex & expanded character is more than one byte. \\
+% |\'| & \'x~~Acute & \\
+% |\"| & \"x~~Umlaut & {\it However},\\
+% |\~| & \~x~~Tilde &
+% Use these characters freely, \stringstrings\\
+% |\`| & \`x~~Grave &
+% encoding functions transparently with them.\\
+% |\.| & \.x~~Overdot & \\
+% |\=| & \=x~~Macron & |\retokenize| also works\\
+% |\u| & \u x~~Breve & \\
+% |\v| & \v x~~Caron & \\
+% |\H| & \H x~~Double Acute & \\
+% |\ss| & \ss~~Eszett & \\
+% |\AE \ae| & \AE~\ae~~\ae sc & \\
+% |\OE \oe| & \OE~\oe~~\oe thel & \\
+% |\AA \aa| & \AA~\aa~~angstrom & \\
+% |\O \o| & \O~\o~~slashed O & \\
+% |\L \l| & \L~\l~~barred L & \\
+% |~| & Hardspace &\\
+% \hline
+% |$| & begin/end math mode & These characters pose no difficulties;\\
+% |^| & math superscript & However, cannot extract substring that \\
+% |_| & math subscript & breaks in middle of math mode.\\
+% & & Other math mode symbols NOT supported.\\
+% \hline
+% \& & ampersand & Version 1.01 \stringstrings can manipulate the\\
+% & & ampersand. However, returned strings\\
+% & & containing the \& character lose their\\
+% & & catcode-4 status, making them unfit\\
+% & & for use as tabbing characters.\\
+% \hline
+% \hline
+% \end{tabular}
+% \end{table}
+% Table~\ref{tbl:prob} shows a variety of characters and tokens, some of
+% which pose a challenge to \stringstrings manipulations. In all cases,
+% a solution or workaround is provided. For symbols in the top two
+% categories, the workaround
+% solution includes the use of retokenized strings instead of expanded
+% strings. For symbols in the next two categories, use of T1 encoding
+% or retokenizing provides a satisfactory solution. In the bottom three
+% categories, because of \stringstrings encoded |[e]| mode,
+% there is nothing to impede the use of these characters in
+% \stringstrings arguments, if encoded |[e]| mode is employed for
+% intermediate calculations. Some of the
+% details of these problematic cases is described below.
+%
+% Not surprisingly, you are not allowed to extract a substring of a
+% string, if it breaks in the middle of math mode, because a substring
+% with only one |$| in it cannot be |\edef|'ed.
+%
+% There are a few potential quirks when using \LaTeX{}'s native OT1
+% character encoding, most of which can be circumvented by using the
+% more modern
+% T1 encoding (accessed via |\renewcommand\encodingdefault{T1}| in the
+% document preamble). The quirks arise because there are
+% several characters that, while displayable in \LaTeX{}, are not part
+% of the OT1 character encoding. The characters include |\{|, |\}|, and
+% the \verb,|, symbol (accessed in \stringstrings via \verb,\|,).
+% When using \stringstrings to manipulate strings containing
+% these characters in the presence of OT1 encoding,
+% they come out looking like \stringdecode{\{}, \stringdecode{\}},
+% and \stringdecode{\|}, respectively. However, if the T1 encoding fix
+% is not an option for you, you can also work around this problem by
+% |\retokenize|'ing the affected string (the |\retokenize| command is
+% provided to convert encoded, expanded strings back into tokenized
+% form, if need be).
+%
+% Likewise, for both OT1 and T1 encoding, the characters \dag~(|\dag|),
+% \ddag~(|\ddag|), \P~(|\P|), \d~~(|\d|), \t~~~(|\t|), \b~~~(|\b|),
+% and \copyright~(|\copyright|)
+% cannot be in the argument of an |\edef| expression. For
+% manipulated strings including these characters, |\retokenize| is the
+% only option available to retain the integrity of the string.
+%
+% As discussed thoroughly in the previous section, an ``encoded'' form of
+% the string manipulation routines is provided to prevent the
+% undesirable circumstance of passing an |\edef|'ed symbol as input
+% to a subsequent manipulation. Likewise, never try to ``decode''
+% an already ``decoded'' string.
+%
+% When \stringstrings doesn't understand a token, it is supposed to
+% replace it with a period. However, some undecipherable characters may
+% inadvertantly be replaced with a space, instead. Of course, neither
+% of these possibilities is any comfort to the user.
+%
+% As mentioned already, \stringstrings cannot handle curly braces that
+% are used for grouping purposes, a circumstance which often arises in
+% math mode. Nonetheless, |\LB| and |\RB| may be used within
+% \stringstrings arguments in lieu of grouping braces, {\it if the final
+% result is to be retokenized}. Thus, |\caselower[e]{$X^\LB Y + Z\RB$}|
+% followed by |\convertchar[e]{\thestring}{x}{(1+x)}|, when finished up
+% with the following command,
+% |\retokenize[v]{\thestring}| yields as its result:\\
+% \caselower[e]{$X^\LB Y + Z\RB$}\convertchar[e]{\thestring}{x}{(1+x)}
+% \retokenize[v]{\thestring}.
+%
+% One might ask, ``why not retokenize everything, instead of using the
+% |[v]| mode of the \stringstrings routines?'' While one {\it could}
+% do this, the answer is simply
+% that |\retokenize| is a computationally intensive command, and that
+% it is best used, therefore, only when the more efficient methods
+% will not suffice. In many, if not most cases, strings to be
+% manipulated will be solely composed of alphanumeric characters which
+% don't require the use of |\retokenize|, T1 encoding, or even
+% \stringstrings encoding.
+%
+% Despite these several disclaimers and workarounds required when
+% dealing with problematic characters, I hope you find the \stringstrings
+% architecture and feel to be straightforward and useful. There is only
+% one thing left, and that is to dissect the code\ldots and so here we
+% go.
+%
+%% \CharacterTable
+%% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%% Digits \0\1\2\3\4\5\6\7\8\9
+%% Exclamation \! Double quote \" Hash (number) \#
+%% Dollar \$ Percent \% Ampersand \&
+%% Acute accent \' Left paren \( Right paren \)
+%% Asterisk \* Plus \+ Comma \,
+%% Minus \- Point \. Solidus \/
+%% Colon \: Semicolon \; Less than \<
+%% Equals \= Greater than \> Question mark \?
+%% Commercial at \@ Left bracket \[ Backslash \\
+%% Right bracket \] Circumflex \^ Underscore \_
+%% Grave accent \` Left brace \{ Vertical bar \|
+%% Right brace \} Tilde \~}
+% \StopEventually{}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \vspace{-0.8em}
+% \begin{macro}{stringstrings.sty}
+% \section{Code Listing}
+% I'll try to lay out herein
+% the workings of the \stringstrings style package.
+% \begin{macrocode}
+%<*package>
+
+%%%%% INITIALIZATIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\catcode`\&=12
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{ifthen}
+% This package makes wide use of the {\sf ifthen} style package.
+% \begin{macrocode}
+\usepackage{ifthen}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@MAXSTRINGSIZE}
+% The parameter |\@MAXSTRINGSIZE| defines the maximum allowable string
+% size that \stringstrings can operate upon.
+% \begin{macrocode}
+\def\@MAXSTRINGSIZE{500}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+\def\endofstring{@E@o@S@}%
+\def\undecipherable{.}% UNDECIPHERABLE TOKENS TO BE REPLACED BY PERIOD
+\def\@blankaction{\BlankSpace}
+% \end{macrocode}
+% Save the symbols which will get redefined \stringstrings encoding.
+
+% \begin{macrocode}
+\let\SaveDollar\$
+\let\SaveHardspace~
+\let\SaveCircumflex\^
+\let\SaveTilde\~
+\let\SaveUmlaut\"
+\let\SaveGrave\`
+\let\SaveAcute\'
+\let\SaveMacron\=
+\let\SaveOverdot\.
+\let\SaveBreve\u
+\let\SaveCaron\v
+\let\SaveDoubleAcute\H
+\let\SaveCedilla\c
+\let\SaveUnderdot\d
+\let\SaveArchJoin\t
+\let\SaveLineUnder\b
+\let\SaveCopyright\copyright
+\let\SavePounds\pounds
+\let\SaveLeftBrace\{
+\let\SaveRightBrace\}
+\let\SaveUnderscore\_
+\let\SaveDagger\dag
+\let\SaveDoubleDagger\ddag
+\let\SaveSectionSymbol\S
+\let\SavePilcrow\P
+\let\SaveAEsc\AE
+\let\Saveaesc\ae
+\let\SaveOEthel\OE
+\let\Saveoethel\oe
+\let\SaveAngstrom\AA
+\let\Saveangstrom\aa
+\let\SaveSlashedO\O
+\let\SaveSlashedo\o
+\let\SaveBarredL\L
+\let\SaveBarredl\l
+\let\SaveEszett\ss
+\let\SaveLB{
+\let\SaveRB}
+% \end{macrocode}
+
+% The BlankSpace character is the only character which is reencoded
+% with a 1-byte re-encoding\ldots in this case the \OE~character.
+% \begin{macrocode}
+\def\EncodedBlankSpace{\SaveOEthel}
+\edef\BlankSpace{ }
+% \end{macrocode}
+% All other reencoded symbols consist of 2 bytes: an escape character
+% plus a unique code. The escape character is a pipe symbol. the
+% unique code comprises either a single number, letter, or symbol.
+
+% \begin{macrocode}
+\def\EscapeChar{|}
+
+% |0 IS AN ENCODED |, ACCESSED VIA \|
+\def\PipeCode{0}
+\def\EncodedPipe{\EscapeChar\PipeCode}
+\def\Pipe{|}
+\let\|\EncodedPipe
+
+% |1 IS AN ENCODED \$
+\def\DollarCode{1}
+\def\EncodedDollar{\EscapeChar\DollarCode}
+% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING;
+% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING
+\def\Dollar{\symbol{36}}
+% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING
+%\def\Dollar{\SaveDollar}
+
+% |W IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN
+\def\UvariCode{W}
+\def\EncodedUvari{\EscapeChar\UvariCode}
+\def\Uvari{Uvari}
+\let\uvari\EncodedUvari
+
+% |X IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN
+\def\UvariiCode{X}
+\def\EncodedUvarii{\EscapeChar\UvariiCode}
+\def\Uvarii{Uvarii}
+\let\uvarii\EncodedUvarii
+
+% |Y IS RESERVED TO BE ASSIGNED TO AN ARBITRARY TOKEN
+\def\UvariiiCode{Y}
+\def\EncodedUvariii{\EscapeChar\UvariiiCode}
+\def\Uvariii{Uvariii}
+\let\uvariii\EncodedUvariii
+
+% |2 IS AN ENCODED ^ FOR USE IN TEXT MODE, ACCESSED VIA \carat
+\def\CaratCode{2}
+\def\EncodedCarat{\EscapeChar\CaratCode}
+\def\Carat{\symbol{94}}
+\let\carat\EncodedCarat
+
+% |4 IS AN ENCODED \{
+\def\LeftBraceCode{4}
+\def\EncodedLeftBrace{\EscapeChar\LeftBraceCode}
+% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING;
+% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING
+\def\LeftBrace{\symbol{123}}
+% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING
+%\def\LeftBrace{\SaveLeftBrace}
+
+% |5 IS AN ENCODED \}
+\def\RightBraceCode{5}
+\def\EncodedRightBrace{\EscapeChar\RightBraceCode}
+% THE FOLLOWING IS NEEDED TO KEEP OT1 ENCODING FROM BREAKING;
+% IT PROVIDES AN ADEQUATE BUT NOT IDEAL ENVIRONMENT FOR T1 ENCODING
+\def\RightBrace{\symbol{125}}
+% THE FOLLOWING IS BETTER FOR T1 ENCODING, BUT BREAKS OT1 ENCODING
+%\def\RightBrace{\SaveRightBrace}
+
+% |6 IS AN ENCODED \_
+\def\UnderscoreCode{6}
+\def\EncodedUnderscore{\EscapeChar\UnderscoreCode}
+\def\Underscore{\symbol{95}}
+%\def\Underscore{\SaveUnderscore}
+
+% |7 IS AN ENCODED \^
+\def\CircumflexCode{7}
+\def\EncodedCircumflex{\EscapeChar\CircumflexCode}
+\def\Circumflex{\noexpand\SaveCircumflex}
+
+% |8 IS AN ENCODED \~
+\def\TildeCode{8}
+\def\EncodedTilde{\EscapeChar\TildeCode}
+\def\Tilde{\noexpand\SaveTilde}
+
+% |" IS AN ENCODED \"
+\def\UmlautCode{"}
+\def\EncodedUmlaut{\EscapeChar\UmlautCode}
+\def\Umlaut{\noexpand\SaveUmlaut}
+
+% |` IS AN ENCODED \`
+\def\GraveCode{`}
+\def\EncodedGrave{\EscapeChar\GraveCode}
+\def\Grave{\noexpand\SaveGrave}
+
+% |' IS AN ENCODED \'
+\def\AcuteCode{'}
+\def\EncodedAcute{\EscapeChar\AcuteCode}
+\def\Acute{\noexpand\SaveAcute}
+
+% |= IS AN ENCODED \=
+\def\MacronCode{=}
+\def\EncodedMacron{\EscapeChar\MacronCode}
+\def\Macron{\noexpand\SaveMacron}
+
+% |. IS AN ENCODED \.
+\def\OverdotCode{.}
+\def\EncodedOverdot{\EscapeChar\OverdotCode}
+\def\Overdot{\noexpand\SaveOverdot}
+
+% |u IS AN ENCODED \u
+\def\BreveCode{u}
+\def\EncodedBreve{\EscapeChar\BreveCode}
+\def\Breve{\noexpand\SaveBreve}
+
+% |v IS AN ENCODED \v
+\def\CaronCode{v}
+\def\EncodedCaron{\EscapeChar\CaronCode}
+\def\Caron{\noexpand\SaveCaron}
+
+% |H IS AN ENCODED \H
+\def\DoubleAcuteCode{H}
+\def\EncodedDoubleAcute{\EscapeChar\DoubleAcuteCode}
+\def\DoubleAcute{\noexpand\SaveDoubleAcute}
+
+% |c IS AN ENCODED \c
+\def\CedillaCode{c}
+\def\EncodedCedilla{\EscapeChar\CedillaCode}
+\def\Cedilla{\noexpand\SaveCedilla}
+
+% |d IS AN ENCODED \d
+\def\UnderdotCode{d}
+\def\EncodedUnderdot{\EscapeChar\UnderdotCode}
+\def\Underdot{.}% CANNOT \edef \d
+
+% |t IS AN ENCODED \t
+\def\ArchJoinCode{t}
+\def\EncodedArchJoin{\EscapeChar\ArchJoinCode}
+\def\ArchJoin{.}% CANNOT \edef \t
+
+% |b IS AN ENCODED \b
+\def\LineUnderCode{b}
+\def\EncodedLineUnder{\EscapeChar\LineUnderCode}
+\def\LineUnder{.}% CANNOT \edef \b
+
+% |C IS AN ENCODED \copyright
+\def\CopyrightCode{C}
+\def\EncodedCopyright{\EscapeChar\CopyrightCode}
+\def\Copyright{.}% CANNOT \edef \copyright
+
+% |p IS AN ENCODED \pounds
+\def\PoundsCode{p}
+\def\EncodedPounds{\EscapeChar\PoundsCode}
+\def\Pounds{\SavePounds}
+
+% |[ IS AN ENCODED {
+\def\LBCode{[}
+\def\EncodedLB{\EscapeChar\LBCode}
+\def\UnencodedLB{.}
+\def\LB{\EncodedLB}
+
+% |] IS AN ENCODED }
+\def\RBCode{]}
+\def\EncodedRB{\EscapeChar\RBCode}
+\def\UnencodedRB{.}
+\def\RB{\EncodedRB}
+
+% |z IS AN ENCODED \dag
+\def\DaggerCode{z}
+\def\EncodedDagger{\EscapeChar\DaggerCode}
+\def\Dagger{.}% CANNOT \edef \dag
+
+% |Z IS AN ENCODED \ddag
+\def\DoubleDaggerCode{Z}
+\def\EncodedDoubleDagger{\EscapeChar\DoubleDaggerCode}
+\def\DoubleDagger{.}% CANNOT \edef \ddag
+
+% |S IS AN ENCODED \S
+\def\SectionSymbolCode{S}
+\def\EncodedSectionSymbol{\EscapeChar\SectionSymbolCode}
+\def\SectionSymbol{\SaveSectionSymbol}
+
+% |P IS AN ENCODED \P
+\def\PilcrowCode{P}
+\def\EncodedPilcrow{\EscapeChar\PilcrowCode}
+\def\Pilcrow{.}% CANNOT \edef \P
+
+% |E IS AN ENCODED \AE
+\def\AEscCode{E}
+\def\EncodedAEsc{\EscapeChar\AEscCode}
+\def\AEsc{\SaveAEsc}
+
+% |e IS AN ENCODED \ae
+\def\aescCode{e}
+\def\Encodedaesc{\EscapeChar\aescCode}
+\def\aesc{\Saveaesc}
+
+% |O IS AN ENCODED \OE
+\def\OEthelCode{O}
+\def\EncodedOEthel{\EscapeChar\OEthelCode}
+\def\OEthel{\SaveOEthel}
+
+% |o IS AN ENCODED \oe
+\def\oethelCode{o}
+\def\Encodedoethel{\EscapeChar\oethelCode}
+\def\oethel{\Saveoethel}
+
+% |A IS AN ENCODED \AA
+\def\AngstromCode{A}
+\def\EncodedAngstrom{\EscapeChar\AngstromCode}
+\def\Angstrom{\SaveAngstrom}
+
+% |a IS AN ENCODED \aa
+\def\angstromCode{a}
+\def\Encodedangstrom{\EscapeChar\angstromCode}
+\def\angstrom{\Saveangstrom}
+
+% |Q IS AN ENCODED \O
+\def\SlashedOCode{Q}
+\def\EncodedSlashedO{\EscapeChar\SlashedOCode}
+\def\SlashedO{\SaveSlashedO}
+
+% |q IS AN ENCODED \o
+\def\SlashedoCode{q}
+\def\EncodedSlashedo{\EscapeChar\SlashedoCode}
+\def\Slashedo{\SaveSlashedo}
+
+% |L IS AN ENCODED \L
+\def\BarredLCode{L}
+\def\EncodedBarredL{\EscapeChar\BarredLCode}
+\def\BarredL{\SaveBarredL}
+
+% |l IS AN ENCODED \l
+\def\BarredlCode{l}
+\def\EncodedBarredl{\EscapeChar\BarredlCode}
+\def\Barredl{\SaveBarredl}
+
+% |s IS AN ENCODED \ss
+\def\EszettCode{s}
+\def\EncodedEszett{\EscapeChar\EszettCode}
+\def\Eszett{\SaveEszett}
+
+\newcounter{@letterindex}
+\newcounter{@@letterindex}
+\newcounter{@@@letterindex}
+\newcounter{@wordindex}
+\newcounter{@iargc}
+\newcounter{@gobblesize}
+\newcounter{@maxrotation}
+\newcounter{@stringsize}
+\newcounter{@@stringsize}
+\newcounter{@@@stringsize}
+\newcounter{@revisedstringsize}
+\newcounter{@gobbleindex}
+\newcounter{@charsfound}
+\newcounter{@alph}
+\newcounter{@alphaindex}
+\newcounter{@capstrigger}
+\newcounter{@fromindex}
+\newcounter{@toindex}
+\newcounter{@previousindex}
+\newcounter{@flag}
+\newcounter{@matchloc}
+\newcounter{@matchend}
+\newcounter{@matchsize}
+\newcounter{@matchmax}
+\newcounter{@skipped}
+\newcounter{@lcwords}
+% \end{macrocode}
+% \begin{macrocode}
+%%%%% CONFIGURATION COMMANDS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \end{macrocode}
+
+% \begin{macro}{\defaultTreatments}
+% This command can be used to restore the default string treatments,
+% prior to calling |\substring|. The default treatments leave all
+% symbol types intact and unaltered.
+% \begin{macrocode}
+\newcommand\defaultTreatments{%
+ \def\EncodingTreatment{v}% <--Set=v to decode special chars (vs. q,e)
+ \def\AlphaCapsTreatment{1}% <--Set=1 to retain uppercase (vs. 0,2)
+ \def\AlphaTreatment{1}% <--Set=1 to retain lowercase (vs. 0,2)
+ \def\PunctuationTreatment{1}% <--Set=1 to retain punctuation (vs. 0)
+ \def\NumeralTreatment{1}% <--Set=1 to retain numerals (vs. 0)
+ \def\SymbolTreatment{1}% <--Set=1 to retain special chars (vs. 0)
+ \def\BlankTreatment{1}% <--Set=1 to retain blanks (vs. 0)
+ \def\CapitalizeString{0}% <--Set=0 for no special action (vs. 1,2)
+ \def\SeekBlankSpace{0}% <--Set=0 for no special action (vs. 1,2)
+}
+\defaultTreatments
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\Treatments}
+% This command allows the user to specify the desired character class
+% treatments, prior to a call to |\substring|. Unfortunately for the
+% user, I have specified which character class each symbol belongs to.
+% Therefore, it is not easy if the user decides that he wants a cedilla,
+% for example, to be treated like an alphabetic character rather than
+% a symbol.
+% \begin{macrocode}
+% QUICK WAY TO SET UP TREATMENTS BY WHICH \@rotate HANDLES VARIOUS
+% CHARACTERS
+\newcommand\Treatments[6]{%
+ \def\AlphaCapsTreatment{#1}% <--Set=0 to remove uppercase
+% =1 to retain uppercase
+% =2 to change UC to lc
+ \def\AlphaTreatment{#2}% <--Set=0 to remove lowercase
+% =1 to retain lowercase
+% =2 to change lc to UC
+ \def\PunctuationTreatment{#3}%<--Set=0 to remove punctuation
+% =1 to retain punctuation
+ \def\NumeralTreatment{#4}% <--Set=0 to remove numerals
+% =1 to retain numerals
+ \def\SymbolTreatment{#5}% <--Set=0 to remove special chars
+% =1 to retain special chars
+ \def\BlankTreatment{#6}% <--Set=0 to remove blanks
+% =1 to retain blanks
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\+}
+% This command (|\+|) is used to enact the \stringstrings encoding.
+% Key symbols are redefined, and any |\edef| which occurs while this
+% command is active will adopt these new definitions.
+% \begin{macrocode}
+% REENCODE MULTIBYTE SYMBOLS USING THE stringstrings ENCODING METHOD
+\newcommand\+{%
+ \def\${\EncodedDollar}%
+ \def~{\EncodedBlankSpace}%
+ \def\^{\EncodedCircumflex}%
+ \def\~{\EncodedTilde}%
+ \def\"{\EncodedUmlaut}%
+ \def\`{\EncodedGrave}%
+ \def\'{\EncodedAcute}%
+ \def\={\EncodedMacron}%
+ \def\.{\EncodedOverdot}%
+ \def\u{\EncodedBreve}%
+ \def\v{\EncodedCaron}%
+ \def\H{\EncodedDoubleAcute}%
+ \def\c{\EncodedCedilla}%
+ \def\d{\EncodedUnderdot}%
+ \def\t{\EncodedArchJoin}%
+ \def\b{\EncodedLineUnder}%
+ \def\copyright{\EncodedCopyright}%
+ \def\pounds{\EncodedPounds}%
+ \def\{{\EncodedLeftBrace}%
+ \def\}{\EncodedRightBrace}%
+ \def\_{\EncodedUnderscore}%
+ \def\dag{\EncodedDagger}%
+ \def\ddag{\EncodedDoubleDagger}%
+ \def\S{\EncodedSectionSymbol}%
+ \def\P{\EncodedPilcrow}%
+ \def\AE{\EncodedAEsc}%
+ \def\ae{\Encodedaesc}%
+ \def\OE{\EncodedOEthel}%
+ \def\oe{\Encodedoethel}%
+ \def\AA{\EncodedAngstrom}%
+ \def\aa{\Encodedangstrom}%
+ \def\O{\EncodedSlashedO}%
+ \def\o{\EncodedSlashedo}%
+ \def\L{\EncodedBarredL}%
+ \def\l{\EncodedBarredl}%
+ \def\ss{\EncodedEszett}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\?}
+% The command |\?| reverts the character encodings back to the standard
+% \LaTeX{} definitions. The command effectively undoes a previously
+% enacted |\+|.
+% \begin{macrocode}
+% WHEN TASK IS DONE, REVERT ENCODING TO STANDARD ENCODING METHOD
+\newcommand\?{%
+ \let\$\SaveDollar%
+ \let~\SaveHardspace%
+ \let\^\SaveCircumflex%
+ \let\~\SaveTilde%
+ \let\"\SaveUmlaut%
+ \let\`\SaveGrave%
+ \let\'\SaveAcute%
+ \let\=\SaveMacron%
+ \let\.\SaveOverdot%
+ \let\u\SaveBreve%
+ \let\v\SaveCaron%
+ \let\H\SaveDoubleAcute%
+ \let\c\SaveCedilla%
+ \let\d\SaveUnderdot%
+ \let\t\SaveArchJoin%
+ \let\b\SaveLineUnder%
+ \let\copyright\SaveCopyright%
+ \let\pounds\SavePounds%
+ \let\{\SaveLeftBrace%
+ \let\}\SaveRightBrace%
+ \let\_\SaveUnderscore%
+ \let\dag\SaveDagger%
+ \let\ddag\SaveDoubleDagger%
+ \let\S\SaveSectionSymbol%
+ \let\P\SavePilcrow%
+ \let\AE\SaveAEsc%
+ \let\ae\Saveaesc%
+ \let\OE\SaveOEthel%
+ \let\oe\Saveoethel%
+ \let\AA\SaveAngstrom%
+ \let\aa\Saveangstrom%
+ \let\O\SaveSlashedO%
+ \let\o\SaveSlashedo%
+ \let\L\SaveBarredL%
+ \let\l\SaveBarredl%
+ \let\ss\SaveEszett%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\encodetoken}
+% The command |\encodetoken| assigns the supplied token to one of three
+% reserved \stringstrings user variables (the optional argument dictates
+% which user variable). Once encoded, the supplied token cannot be used
+% in the normal way, but only in stringstrings routines, unless and
+% until it is decoded.
+% \begin{macrocode}
+\newcommand\encodetoken[2][1]{%
+ \if 1#1%
+ \let\Uvari#2%
+ \let#2\uvari\else
+ \if 2#1%
+ \let\Uvarii#2%
+ \let#2\uvarii\else
+ \if 3#1%
+ \let\Uvariii#2%
+ \let#2\uvariii%
+ \fi
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\decodetoken}
+% The command |\decodetoken| deassigns the supplied token from the
+% reserved \stringstrings user variables (the optional argument dictates
+% which user variable), so that the token may be used in the normal way
+% again.
+% \begin{macrocode}
+\newcommand\decodetoken[2][1]{%
+ \if 1#1%
+ \let#2\Uvari%
+ \def\Uvari{Uvari}\else
+ \if 2#1%
+ \let#2\Uvarii%
+ \def\Uvarii{Uvarii}\else
+ \if 3#1%
+ \let#2\Uvariii%
+ \def\Uvariii{Uvariii}%
+ \fi
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+%%%%% COMMANDS TO MANIPULATE STRINGS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \end{macrocode}
+
+% In the next group of commands, the result is always stored in an
+% expandable string, |\thestring|. Expandable means that |\thestring| can
+% be put into a subsequent |\edef{}| command. Additionally, the
+% optional first argument can be used to cause three actions (verbose,
+% encoded, or quiet):
+% \begin{enumerate}
+% \item [|=v|] |\thestring| is decoded (final result);
+% print it immediately (default)
+% \item [|=e|] |\thestring| is encoded (intermediate result);
+% don't print it
+% \item [|=q|] |\thestring| is decoded (final result),
+% but don't print it
+% \end{enumerate}
+% \begin{macro}{\substring}
+% The command |\substring| is the brains of this package\ldots
+% It is used to acquire a substring from a given string, along with
+% performing specified character manipulations along the way.
+% Its strategy is fundamental to the \stringstrings
+% package: sequentially rotate the 1st character of the
+% string to the end of the string, until the desired substring resides
+% at end of rotated string. Then, gobble up the leading part of
+% string until only the desired substring is left.
+% \begin{macrocode}
+\newcommand\substring[4][v]{\+%
+% \end{macrocode}
+% Obtain the string length of the string to be manipulated and store
+% it in |@stringsize|.
+% \begin{macrocode}
+ \@getstringlength{#2}{@stringsize}%
+% \end{macrocode}
+% First,
+% |\@decodepointer| is used to convert indirect references like |$|
+% and |$-3| into integers.
+% \begin{macrocode}
+ \@decodepointer{#3}%
+ \setcounter{@fromindex}{\@fromtoindex}%
+ \@decodepointer{#4}%
+ \setcounter{@toindex}{\@fromtoindex}%
+% \end{macrocode}
+% Determine the number of characters to rotate to the end of the string
+% and the number of characters to then gobble from it, in order to leave
+% the desired substring.
+% \begin{macrocode}
+ \setcounter{@gobblesize}{\value{@stringsize}}%
+ \ifthenelse{\value{@toindex} > \value{@stringsize}}%
+ {\setcounter{@maxrotation}{\value{@stringsize}}}%
+ {\setcounter{@maxrotation}{\value{@toindex}}}%
+ \addtocounter{@gobblesize}{-\value{@maxrotation}}%
+ \addtocounter{@gobblesize}{\value{@fromindex}}%
+ \addtocounter{@gobblesize}{-1}%
+% \end{macrocode}
+% Prepare for the string rotation by initializing counters, setting the
+% targeted string into the working variable, |\rotatingword|, and set
+% the encoding treatment specified.
+% \begin{macrocode}
+ \setcounter{@letterindex}{0}%
+ \edef\rotatingword{#2}%
+ \def\EncodingTreatment{#1}%
+% \end{macrocode}
+% If capitalization (first character of string or of each word)
+% was specified, the
+% trigger for 1st-character capitalization will be set. However,
+% the treatments for the alphabetic characters for the remainder of the
+% string must be saved and reinstituted after the first character is
+% capitalized.
+% \begin{macrocode}
+ \if 0\CapitalizeString%
+% DO NOT SET CAPITALIZE TRIGGER FOR FIRST CHARACTER
+ \setcounter{@capstrigger}{0}%
+ \else
+% SAVE CERTAIN TREATMENTS FOR LATER RESTORATION
+ \let\SaveAlphaTreatment\AlphaTreatment%
+ \let\SaveAlphaCapsTreatment\AlphaCapsTreatment%
+% SET CAPITALIZE TRIGGER FOR FIRST CHARACTER
+ \setcounter{@capstrigger}{1}%
+ \@forcecapson%
+ \fi
+% \end{macrocode}
+% The command |\@defineactions| looks at the defined treatments
+% and specifies how each of the \stringstrings encoded
+% characters should be handled (\ie left alone, removed, modified,
+% \etc).
+% \begin{macrocode}
+\@defineactions%
+% \end{macrocode}
+% Here begins the primary loop of |\substring| in which characters of
+% |\rotatingword| are successively moved (and possibly manipulated)
+% from the first character of the string to the last. |@letterindex| is
+% the running index defining how many characters have been operated on.
+% \begin{macrocode}
+ \whiledo{\value{@letterindex} < \value{@maxrotation}}{%
+ \addtocounter{@letterindex}{1}%
+% \end{macrocode}
+% When |\CapitalizeString| equals 1, only the first character of the
+% string is capitalized. When it equals 2, every word in the string
+% is capitalized. When equal to 2, this bit of code looks for the
+% blankspace that follows the end of a word, and uses it to reset the
+% capitalization trigger for the next non-blank character.
+% \begin{macrocode}
+% IF NEXT CHARACTER BLANK WHILE \CapitalizeString=2,
+% SET OR KEEP ALIVE TRIGGER.
+ \if 2\CapitalizeString%
+ \isnextbyte[q]{\EncodedBlankSpace}{\rotatingword}%
+ \if F\theresult\isnextbyte[q]{\BlankSpace}{\rotatingword}\fi%
+ \if T\theresult%
+ \if 0\arabic{@capstrigger}%
+ \@forcecapson%
+ \@defineactions%
+ \fi
+ \setcounter{@capstrigger}{2}%
+ \fi
+ \fi
+% \end{macrocode}
+% Is the next character an encoded symbol? If it is a normal character,
+% simply rotate it to the end of the string.
+% If it is an encoded symbol however, its
+% treatment will depend on whether it will be gobbled away or end up
+% in the final substring. If it will be gobbled away, leave it encoded,
+% because the gobbling routine knows how to gobble encoded characters.
+% If it will end up in the substring, manipulate it according to the
+% encoding rules set in |\@defineactions| and rotate it.
+% \begin{macrocode}
+% CHECK IF NEXT CHARACTER IS A SYMBOL
+ \isnextbyte[q]{\EscapeChar}{\rotatingword}%
+ \ifthenelse{\value{@letterindex} < \value{@fromindex}}%
+ {%
+% THIS CHARACTER WILL EVENTUALLY BE GOBBLED
+ \if T\theresult%
+% ROTATE THE ESCAPE CHARACTER, WHICH WILL LEAVE THE SYMBOL ENCODED
+% FOR PROPER GOBBLING (ESCAPE CHARACTER DOESN'T COUNT AS A LETTER)
+ \edef\rotatingword{\@rotate{\rotatingword}}%
+ \addtocounter{@letterindex}{-1}%
+ \else
+% NORMAL CHARACTER OR SYMBOL CODE... ROTATE IT
+ \edef\rotatingword{\@rotate{\rotatingword}}%
+ \fi
+ }%
+ {%
+% THIS CHARACTER WILL EVENTUALLY MAKE IT INTO SUBSTRING
+ \if T\theresult%
+% ROTATE THE SYMBOL USING DEFINED TREATMENT RULES
+ \edef\rotatingword{\ESCrotate{\expandafter\@gobble\rotatingword}}%
+ \else
+% NORMAL CHARACTER... ROTATE IT
+ \edef\rotatingword{\@rotate{\rotatingword}}%
+ \fi
+ }%
+% \end{macrocode}
+% Here, the capitalization trigger persistently tries to turn
+% itself off with each loop
+% through the string rotation. Only if the earlier code found the
+% rotation to be pointing to the blank character(s) between words while
+% |\CapitalizeString| equals 2 will the trigger be prevented from
+% extinguishing itself.
+% \begin{macrocode}
+% DECREMENT CAPITALIZATION TRIGGER TOWARDS 0, EVERY TIME THROUGH LOOP
+ \if 0\arabic{@capstrigger}%
+ \else
+ \addtocounter{@capstrigger}{-1}%
+ \if 0\arabic{@capstrigger}\@relaxcapson\fi
+ \fi
+% \end{macrocode}
+% In addition to the standard |\substring| calls in which fixed
+% substring limits are specified (which in turn fixes the number of
+% character rotations to be executed), some \stringstrings commands
+% want the rotations to continue until a blankspace is located.
+% This bit of code looks for that blank space, if that was the option
+% requested. Once found, the rotation will stop. However, depending
+% on the value of |\SeekBlankSpace|, the remainder of the string may
+% either be retained or discarded.
+% \begin{macrocode}
+% IF SOUGHT SPACE IS FOUND, END ROTATION OF STRING
+ \if 0\SeekBlankSpace\else
+ \isnextbyte[q]{\EncodedBlankSpace}{\rotatingword}%
+ \if F\theresult\isnextbyte[q]{\BlankSpace}{\rotatingword}\fi%
+ \if T\theresult%
+ \if 1\SeekBlankSpace%
+% STOP ROTATION, KEEP REMAINDER OF STRING
+ \setcounter{@maxrotation}{\value{@letterindex}}%
+ \else
+% STOP ROTATION, THROW AWAY REMAINDER OF STRING
+ \addtocounter{@gobblesize}{\value{@maxrotation}}%
+ \setcounter{@maxrotation}{\value{@letterindex}}%
+ \addtocounter{@gobblesize}{-\value{@maxrotation}}%
+ \fi
+ \fi
+ \fi
+ }%
+% \end{macrocode}
+% The loop has ended.\\
+% Gobble up the first |@gobblesize| characters (not bytes!)~of the string,
+% which should leave the desired substring as the remainder. If the
+% mode is verbose, print out the resulting substring.
+% \begin{macrocode}
+% GOBBLE AWAY THAT PART OF STRING THAT ISN'T PART OF REQUESTED SUBSTRING
+ \@gobblearg{\rotatingword}{\arabic{@gobblesize}}%
+ \edef\thestring{\gobbledword}%
+ \if v#1\thestring\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% Many of the following commands are self-expanatory. The recipe they
+% follow is to use |\Treatments| to specify how different character
+% classes are to be manipulated, and then to call upon |\substring| to
+% effect the desired manipulation. Treatments are typically
+% re-defaulted at the conclusion of the command, which is why the user,
+% if desiring special treatments, should specify those treatments
+% immediately before a call to |\substring|.
+% \begin{macro}{\caseupper}
+% \begin{macrocode}
+% Convert Lower to Uppercase; retain all symbols, numerals,
+% punctuation, and blanks.
+\newcommand\caseupper[2][v]{%
+ \Treatments{1}{2}{1}{1}{1}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\caselower}
+% \begin{macrocode}
+% Convert Upper to Lowercase; retain all symbols, numerals,
+% punctuation, and blanks.
+\newcommand\caselower[2][v]{%
+ \Treatments{2}{1}{1}{1}{1}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\solelyuppercase}
+% \begin{macrocode}
+% Convert Lower to Uppercase; discard symbols, numerals, and
+% punctuation, but keep blanks.
+\newcommand\solelyuppercase[2][v]{%
+ \Treatments{1}{2}{0}{0}{0}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\solelylowercase}
+% \begin{macrocode}
+% Convert Upper to Lowercase; discard symbols, numerals, and
+% punctuation, but keep blanks.
+\newcommand\solelylowercase[2][v]{%
+ \Treatments{2}{1}{0}{0}{0}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\changecase}
+% \begin{macrocode}
+% Convert Lower to Uppercase & Upper to Lower; retain all symbols, numerals,
+% punctuation, and blanks.
+\newcommand\changecase[2][v]{%
+ \Treatments{2}{2}{1}{1}{1}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\noblanks}
+% \begin{macrocode}
+% Remove blanks; retain all else.
+\newcommand\noblanks[2][v]{%
+ \Treatments{1}{1}{1}{1}{1}{0}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\nosymbolsnumerals}
+% \begin{macrocode}
+% Retain case; discard symbols & numerals; retain
+% punctuation & blanks.
+\newcommand\nosymbolsnumerals[2][v]{%
+ \Treatments{1}{1}{1}{0}{0}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\alphabetic}
+% \begin{macrocode}
+% Retain case; discard symbols, numerals &
+% punctuation; retain blanks.
+\newcommand\alphabetic[2][v]{%
+ \Treatments{1}{1}{0}{0}{0}{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\capitalize}
+% The command |\CapitalizeString| is not set by |\Treatments|, but
+% only in |\capitalize| or in |\capitalizewords|.
+% \begin{macrocode}
+% Capitalize first character of string,
+\newcommand\capitalize[2][v]{%
+ \defaultTreatments%
+ \def\CapitalizeString{1}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \def\CapitalizeString{0}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\capitalizewords}
+% \begin{macrocode}
+% Capitalize first character of each word in string,
+\newcommand\capitalizewords[2][v]{%
+ \defaultTreatments%
+ \def\CapitalizeString{2}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \def\CapitalizeString{0}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\reversestring}
+% Reverses a string from back to front. To do this, a loop is set
+% up in which characters are grabbed one at a time from the end of the
+% given string, working towards the beginning of the string. The
+% grabbed characters are concatenated onto the end of the working
+% string, |\@reversedstring|. By the time the loop is complete
+% |\@reversedstring| fully represents the reversed string. The result
+% is placed into |\thestring|.
+% \begin{macrocode}
+% REVERSES SEQUENCE OF CHARACTERS IN STRING
+\newcommand\reversestring[2][v]{%
+ \def\@reversedstring{}%
+ \+\@getstringlength{#2}{@@stringsize}\?%
+ \setcounter{@@@letterindex}{\the@@stringsize}%
+ \whiledo{\the@@@letterindex > 0}{%
+ \if e#1%
+ \substring[e]{#2}{\the@@@letterindex}{\the@@@letterindex}%
+ \else
+ \substring[q]{#2}{\the@@@letterindex}{\the@@@letterindex}%
+ \fi
+ \edef\@reversedstring{\@reversedstring\thestring}%
+ \addtocounter{@@@letterindex}{-1}%
+ }%
+ \edef\thestring{\@reversedstring}%
+ \if v#1\thestring\fi%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\convertchar}
+% Takes a string, and replaces each occurance of a specified character
+% with a replacement string. The only complexity in the logic is that
+% a separate replacement algorithm exists depending on whether the
+% specified character to be replaced is a normal character or an
+% encoded character.
+% \begin{macrocode}
+% TAKES A STARTING STRING #2 AND SUBSTITUTES A SPECIFIED STRING #4
+% FOR EVERY OCCURANCE OF A PARTICULAR GIVEN CHARACTER #3. THE
+% CHARACTER TO BE CONVERTED MAY BE EITHER A PLAIN CHARACTER OR
+% AN ENCODABLE SYMBOL.
+\newcommand\convertchar[4][v]{%
+ \+%
+ \edef\encodedstring{#2}%
+ \edef\encodedfromarg{#3}%
+ \edef\encodedtoarg{#4}%
+ \?%
+ \isnextbyte[q]{\EscapeChar}{\encodedfromarg}%
+ \if F\theresult%
+% PLAIN "FROM" ARGUMENT
+ \@convertbytetostring[#1]{\encodedstring}{#3}{\encodedtoarg}%
+ \else
+% ENCODABLE "FROM" ARGUMENT
+ \@convertsymboltostring[#1]{\encodedstring}%
+ {\expandafter\@gobble\encodedfromarg}{\encodedtoarg}%
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\convertword}
+% Takes a string, a replaces each occurance of a specified string
+% with a replacement string.
+% \begin{macrocode}
+\newcounter{@@matchloc}
+% LIKE \convertchar, EXCEPT FOR WORDS
+\newcommand\convertword[4][v]{%
+ \+\edef\@@teststring{#2}%
+ \edef\@fromstring{#3}%
+ \edef\@tostring{#4}\?%
+ \edef\@@@teststring{\@@teststring}%
+ \def\@buildfront{}%
+ \edef\@buildstring{\@@teststring}%
+ \setcounter{@charsfound}{0}%
+ \whiledo{\the@charsfound > -1}{%
+% \end{macrocode}
+% Seek occurance of |\@fromstring| in larger |\@@teststring|
+% \begin{macrocode}
+ \whereisword[q]{\@@teststring}{\@fromstring}%
+ \setcounter{@matchloc}{\theresult}%
+ \ifthenelse{\the@matchloc = 0}%
+ {%
+% \end{macrocode}
+% Not found. Done.
+% \begin{macrocode}
+ \setcounter{@charsfound}{-1}%
+ }%
+ {%
+% \end{macrocode}
+% Potential matchstring.
+% \begin{macrocode}
+ \addtocounter{@charsfound}{1}%
+% \end{macrocode}
+% Grab current test string from beginning to point just prior
+% to potential match.
+% \begin{macrocode}
+ \addtocounter{@matchloc}{-1}%
+ \substring[e]{\@@@teststring}{1}{\the@matchloc}%
+% \end{macrocode}
+% The string |\@buildfront| is the total original string, with
+% string substitutions, from character 1 to current potential match.
+% \begin{macrocode}
+ \edef\@buildfront{\@buildfront\thestring}%
+% \end{macrocode}
+% See if potential matchstring takes us to end-of-string\ldots
+% \begin{macrocode}
+ \addtocounter{@matchloc}{1}%
+ \addtocounter{@matchloc}{\the@matchsize}%
+ \ifthenelse{\the@matchloc > \the@@@stringsize}%
+ {%
+% \end{macrocode}
+% \ldots if so, then match is last one in string. Tack on replacement
+% string to |\@buildfront| to create final string. Exit.
+% \begin{macrocode}
+ \setcounter{@charsfound}{-1}%
+ \edef\@buildstring{\@buildfront\@tostring}%
+ }%
+ {%
+% \end{macrocode}
+% \ldots if not, redefine current teststring to begin at point following
+% the current substitution. Make substitutions to current
+% |\@buildstring| and |\@buildfront|. Loop through logic again on new
+% teststring.
+% \begin{macrocode}
+ \substring[e]{\@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}%
+ \edef\@@teststring{\thestring}%
+ \edef\@@@teststring{\@@teststring}%
+ \edef\@buildstring{\@buildfront\@tostring\@@@teststring}%
+ \edef\@buildfront{\@buildfront\@tostring}%
+ }%
+ }%
+ }%
+ \substring[#1]{\@buildstring}{1}{\@MAXSTRINGSIZE}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\resetlcwords}
+% Removes all words from designated ``lower-case words'' list. This can
+% be useful because large lists of lower-case words can significantly
+% slow-down the function of |\capitalizetitle|.
+% \begin{macrocode}
+\setcounter{@lcwords}{0}
+% RESET LOWER-CASE WORD COUNT; START OVER
+\newcommand\resetlcwords[0]{%
+ \setcounter{@lcwords}{0}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\addlcwords}
+% Add words to the list of designated ``lower-case words'' which will
+% not be capitalized by |\capitalizetitle|. The input should consist of
+% space-separated words, which are, in turn, passed on to |\addlcword|.
+% \begin{macrocode}
+% PROVIDE LIST OF SPACE-SEPARATED WORDS TO REMAIN LOWERCASE IN TITLES
+\newcommand\addlcwords[1]{%
+ \getargs{#1}%
+ \setcounter{@wordindex}{0}%
+ \whiledo{\value{@wordindex} < \narg}{%
+ \addtocounter{@wordindex}{1}%
+ \addlcword{\csname arg\roman{@wordindex}\endcsname}%
+ }
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\addlcword}
+% Add a word to the list of designated ``lower-case words'' which will
+% not be capitalized by |\capitalizetitle|.
+% \begin{macrocode}
+% PROVIDE A SINGLE WORD TO REMAIN LOWERCASE IN TITLES
+\newcommand\addlcword[1]{%
+ \addtocounter{@lcwords}{1}%
+ \expandafter\edef\csname lcword\roman{@lcwords}\endcsname{#1}
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\capitalizetitle}
+% Makes every word of a multi-word input string capitalized, except for
+% specifically noted ``lower-case words'' (examples might include
+% prepositions, conjunctions, \etc). The first word of the input string
+% is capitalized, while lower-case words, previously designated with
+% |\addlcword| and |\addlcwords|, are left in lower case.
+% \begin{macrocode}
+% CAPITALIZE TITLE, EXCEPT FOR DESIGNATED "LOWER-CASE" WORDS
+\newcommand\capitalizetitle[2][v]{%
+% First, capitalize every word (save in encoded form, not printed)
+ \capitalizewords[e]{#2}%
+% Then lowercase words that shouldn't be capitalized, like articles,
+% prepositions, etc. (save in encoded form, not printed)
+ \setcounter{@wordindex}{0}%
+ \whiledo{\value{@wordindex} < \value{@lcwords}}{%
+ \addtocounter{@wordindex}{1}%
+ \edef\mystring{\thestring}%
+ \edef\lcword{\csname lcword\roman{@wordindex}\endcsname}%
+ \capitalize[e]{\lcword}%
+ \edef\ucword{\thestring}%
+ \convertword[e]{\mystring}{\ucword~}{\lcword~}%
+ }
+% Finally, recapitalize the first word of the Title, and print it.
+ \capitalize[#1]{\thestring}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\rotateword}
+% Moves first word of given string |#2| to end of string, including
+% leading and trailing blank spaces.
+% \begin{macrocode}
+\newcommand\rotateword[2][v]{%
+ \+\edef\thestring{#2}\?%
+% \end{macrocode}
+% Rotate leading blank spaces to end of string
+% \begin{macrocode}
+ \@treatleadingspaces[e]{\thestring}{}%
+% \end{macrocode}
+% Define end-of-rotate condition for |\substring| as next blank space
+% \begin{macrocode}
+ \def\SeekBlankSpace{1}%
+% \end{macrocode}
+% Leave rotated characters alone
+% \begin{macrocode}
+ \Treatments{1}{1}{1}{1}{1}{1}%
+% \end{macrocode}
+% Rotate to the next blank space or the end of string, whichever comes
+% first.
+% \begin{macrocode}
+ \substring[e]{\thestring}{1}{\@MAXSTRINGSIZE}%
+% \end{macrocode}
+% Rotate trailing spaces.
+% \begin{macrocode}
+ \@treatleadingspaces[#1]{\thestring}{}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\removeword}
+% Remove the first word of given string |#2|, including leading and
+% trailing spaces. Note that logic is identical to |\rotateword|,
+% except that affected spaces and characters are removed instead of
+% being rotated.
+% \begin{macrocode}
+\newcommand\removeword[2][v]{%
+ \+\edef\thestring{#2}\?%
+% \end{macrocode}
+% The |{x}| final argument indicates to delete leading spaces.
+% \begin{macrocode}
+ \@treatleadingspaces[e]{\thestring}{x}%
+ \def\SeekBlankSpace{1}%
+% \end{macrocode}
+% The Treatments are specified to remove all characters.
+% \begin{macrocode}
+ \Treatments{0}{0}{0}{0}{0}{0}%
+ \substring[e]{\thestring}{1}{\@MAXSTRINGSIZE}%
+% \end{macrocode}
+% Trailing spaces are also deleted.
+% \begin{macrocode}
+ \@treatleadingspaces[#1]{\thestring}{x}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\getnextword}
+% A special case of |\getaword|, where word-to-get is specified as
+% ``1''.
+% \begin{macrocode}
+% GETS NEXT WORD FROM STRING #2.
+% NOTE: ROTATES BACK TO BEGINNING, AFTER STRING OTHERWISE EXHAUSTED
+\newcommand\getnextword[2][v]{%
+ \getaword[#1]{#2}{1}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\getaword}
+% Obtain a specified word number (|#3|) from string |#2|. Logic: rotate
+% leading spaces to end of string; then loop |#3|~--~1 times through
+% |\rotateword|. Finally, get next word.
+% \begin{macrocode}
+% GETS WORD #3 FROM STRING #2.
+% NOTE: ROTATES BACK TO BEGINNING, AFTER STRING OTHERWISE EXHAUSTED
+\newcommand\getaword[3][v]{%
+ \setcounter{@wordindex}{1}%
+ \+\edef\thestring{#2}\?%
+ \@treatleadingspaces[e]{\thestring}{}%
+ \whiledo{\value{@wordindex} < #3}{%
+ \rotateword[e]{\thestring}%
+ \addtocounter{@wordindex}{1}%
+ }%
+ \@getnextword[#1]{\thestring}%
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\rotateleadingspaces}
+% Rotate leading spaces of string |#2| to the end of string.
+% \begin{macrocode}
+\newcommand\rotateleadingspaces[2][v]{%
+ \@treatleadingspaces[#1]{#2}{}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\removeleadingspaces}
+% Remove leading spaces from string |#2|.
+% \begin{macrocode}
+\newcommand\removeleadingspaces[2][v]{%
+ \@treatleadingspaces[#1]{#2}{x}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\stringencode}
+% \begin{macrocode}
+% ENCODE STRING; UNLIKE OTHER COMMANDS, DEFAULT IS NO PRINT
+\newcommand\stringencode[2][e]{%
+ \defaultTreatments%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\stringdecode}
+% \begin{macrocode}
+% DECODE STRING
+\newcommand\stringdecode[2][v]{%
+ \defaultTreatments%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\gobblechar}
+% Remove first character (not byte!) from string |#2|. Unlike just about
+% all other \stringstrings commands, result is retokenized and not
+% expanded.
+% \begin{macrocode}
+% SINGLE-CHARACTER VERSION OF \gobblechars. IN THIS CASE, TWO-BYTE
+% ESCAPE SEQUENCES, WHEN ENCOUNTERED, COUNT AS A SINGLE GOBBLE.
+\newcommand\gobblechar[2][q]{\+%
+ \@gobblearg{#2}{1}%
+ \?\retokenize[#1]{\gobbledword}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\gobblechars}
+% Remove first |#3| characters (not bytes!) from string |#2|.
+% Unlike just about all other \stringstrings commands, result is
+% retokenized and not expanded.
+% \begin{macrocode}
+% USER CALLABLE VERSION OF \@gobblearg. TURNS ON REENCODING.
+% GOBBLE FIRST #3 CHARACTERS FROM STRING #2. TWO-BYTE
+% ESCAPE SEQUENCES, WHEN ENCOUNTERED, COUNT AS A SINGLE GOBBLE.
+\newcommand\gobblechars[3][q]{\+%
+ \@gobblearg{#2}{#3}%
+ \?\retokenize[#1]{\gobbledword}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\retokenize}
+% One of the key \stringstrings routines that provides several
+% indispensible functions. Its function is to take an encoded string
+% |#2| that has been given, and repopulate the string with its \LaTeX{}
+% tokens in a |\def| form (not an expanded |\edef| form). It is
+% useful if required to operate on a string outside of the
+% \stringstrings library routines, following a \stringstrings
+% manipulation. It is also useful to display certain tokens which
+% cannot be manipulated in expanded form. See
+% Table~\ref{tbl:prob} for a list of tokens that will only work when the
+% resulting string is retokenized (and not expanded).
+%
+% Logic: Loop through each character of given string |#2|. Each
+% successive character of the string is retokenized as |\inexttoken|,
+% |\iinexttoken|, |\iiinexttoken|, |\ivnexttoken|, \etc, respectively.
+% Then a series of strings are formed as\\
+% \\
+% |\def\buildtoken{}|\\
+% |\def\buildtokeni{\builtoken\inexttoken}|\\
+% |\def\buildtokenii{\builtokeni\iinexttoken}|\\
+% |\def\buildtokeniii{\builtokenii\iiinexttoken}|\\
+% |\def\buildtokeniv{\builtokeniii\ivnexttoken}|\\
+% \\
+% The last in the sequence of |\builtoken...| strings (renamed
+% |\buildtokenq|) is the retokenized
+% version of string |#2|.
+% \begin{macrocode}
+% CONVERTS ENCODED STRING BACK INTO TOKENIZED FORM (i.e., def'ED).
+\newcommand\retokenize[2][q]{\+%
+ \edef\@svstring{#2}%
+ \edef\buildtoken{}%
+ \@getstringlength{#2}{@@stringsize}\?%
+ \setcounter{@@letterindex}{0}%
+ \whiledo{\the@@letterindex < \the@@stringsize}{%
+ \setcounter{@previousindex}{\the@@letterindex}%
+ \addtocounter{@@letterindex}{1}%
+ \substring[e]{\@svstring}{\the@@letterindex}{\the@@letterindex}%
+ \@retokenizechar{\thestring}{\roman{@@letterindex}nexttoken}%
+ \expandafter\def\csname buildtoken\roman{@@letterindex}%
+ \expandafter\endcsname\expandafter%
+ {\csname buildtoken\roman{@previousindex}\expandafter\endcsname%
+ \csname\roman{@@letterindex}nexttoken\endcsname}%
+ }%
+ \expandafter\def\expandafter\buildtokenq\expandafter{%
+ \csname buildtoken\roman{@@letterindex}\endcsname}%
+ \def\thestring{\buildtokenq}%
+ \if v#1\thestring\fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+% %%%%% COMMANDS TO EXTRACT STRING INFORMATION %%%%%%%%%%%%%%%%%%%%%%%%%%
+% \end{macrocode}
+
+% The following group of commands extract information about a string,
+% and store the result in a string called |\theresult|. Since the
+% result is not a substring, a \textit{mode} of |[e]| carries no
+% meaning. Only |[v]| and |[q]| modes apply here.
+% \begin{macro}{\stringlength}
+% Returns the length of the given string in \textit{characters}, not
+% \textit{bytes}.
+% \begin{macrocode}
+% USER CALLABLE VERSION of \@getstringlength:
+% GET'S STRING LENGTH OF [#2], PUTS RESULT IN \theresult. PRINTS RESULT
+% UNLESS IN QUIET [q] MODE.
+\newcommand\stringlength[2][v]{\+%
+ \@getstringlength{#2}{@@stringsize}%
+ \edef\theresult{\arabic{@@stringsize}}%
+ \if v#1\theresult\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\findchars}
+% Find number of occurances of character |#3| in string |#2|.
+% \begin{macrocode}
+% CHECKS TO SEE IF THE CHARACTER [#3] APPEARS ANYWHERE IN STRING [#2].
+% THE NUMBER OF OCCURANCES IS PRINTED OUT, EXCEPT WHEN [#1]=q, QUIET
+% MODE. RESULT IS ALSO STORED IN \theresult . TO FIND SPACES, ARG3
+% SHOULD BE SET TO {~}, NOT { }.
+\newcommand\findchars[3][v]{\+%
+ \@getstringlength{#2}{@@stringsize}%
+ \setcounter{@charsfound}{0}%
+ \setcounter{@@letterindex}{0}%
+% \end{macrocode}
+% Loop through each character of |#2|.
+% \begin{macrocode}
+ \whiledo{\value{@@letterindex} < \value{@@stringsize}}{%
+ \addtocounter{@@letterindex}{1}%
+% \end{macrocode}
+% Test if the |@@letterindex| character of string |#2| equals |#3|.
+% If so, add to tally.
+% \begin{macrocode}
+ \testmatchingchar{#2}{\arabic{@@letterindex}}{#3}%
+ \ifmatchingchar\addtocounter{@charsfound}{1}\fi
+ }%
+ \edef\theresult{\arabic{@charsfound}}%
+ \if q#1\else\theresult\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\whereischar}
+% Similar to |\findchars|, but instead finds first occurance of match
+% character |#3| within |#2| and returns its location within |#2|.
+% \begin{macrocode}
+% CHECKS TO FIND LOCATION OF FIRST OCCURANCE OF [#3] IN STRING [#2].
+% THE LOCATION IS PRINTED OUT, EXCEPT WHEN [#1]=q, QUIET
+% MODE. RESULT IS ALSO STORED IN \theresult . TO FIND SPACES, ARG3
+% SHOULD BE SET TO {~}, NOT { }.
+\newcommand\whereischar[3][v]{\+%
+ \@getstringlength{#2}{@@stringsize}%
+ \edef\@theresult{0}%
+ \setcounter{@@letterindex}{0}%
+% \end{macrocode}
+% Loop through characters of |#2| sequentially.
+% \begin{macrocode}
+ \whiledo{\value{@@letterindex} < \value{@@stringsize}}{%
+ \addtocounter{@@letterindex}{1}%
+% \end{macrocode}
+% Look for match. If found, save character-location index,
+% and reset loop index to break from loop.
+% \begin{macrocode}
+ \testmatchingchar{#2}{\arabic{@@letterindex}}{#3}%
+ \ifmatchingchar%
+ \edef\@theresult{\the@@letterindex}%
+ \setcounter{@@letterindex}{\the@@stringsize}%
+ \fi
+ }%
+ \edef\theresult{\@theresult}%
+ \if q#1\else\theresult\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\whereisword}
+% Finds location of specified word (|#3|) in string |#2|.
+% \begin{macrocode}
+% LIKE \whereischar, EXCEPT FOR WORDS
+\newcommand\whereisword[3][v]{\+%
+ \setcounter{@skipped}{0}%
+% \end{macrocode}
+% |\@@@@teststring| initially contains |#2|. As false alarms are
+% located, the string will be redefined to lop off initial characters
+% of string.
+% \begin{macrocode}
+ \edef\@@@@teststring{#2}%
+ \edef\@matchstring{#3}%
+ \@getstringlength{#2}{@@stringsize}%
+ \setcounter{@@@stringsize}{\value{@@stringsize}}%
+ \@getstringlength{#3}{@matchsize}%
+ \setcounter{@matchmax}{\the@@stringsize}%
+ \addtocounter{@matchmax}{-\the@matchsize}%
+ \addtocounter{@matchmax}{1}%
+ \setcounter{@flag}{0}%
+% \end{macrocode}
+% Define |\matchchar| as the first character of the match string (|#3|).
+% \begin{macrocode}
+ \substring[e]{#3}{1}{1}%
+ \edef\matchchar{\thestring}%
+ \whiledo{\the@flag = 0}{%
+% \end{macrocode}
+% Look for first character of match string within |\@@@@teststring|.
+% \begin{macrocode}
+ \whereischar[q]{\@@@@teststring}{\matchchar}%
+ \setcounter{@matchloc}{\theresult}%
+ \ifthenelse{\equal{0}{\value{@matchloc}}}%
+% \end{macrocode}
+% If none found, we are done.
+% \begin{macrocode}
+ {%
+ \setcounter{@flag}{1}%
+ }%
+% \end{macrocode}
+% If |\matchchar| is found, must determine if it is the beginning
+% of the match string, or just an extraneous match (\ie false alarm).
+% Extract substring
+% of |\@@@@teststring|, of a size equal to the match string.
+% Compare this extracted string with the match string.
+% \begin{macrocode}
+ {%
+ \setcounter{@matchend}{\theresult}%
+ \addtocounter{@matchend}{\value{@matchsize}}%
+ \addtocounter{@matchend}{-1}%
+ \substring[e]{\@@@@teststring}{\the@matchloc}{\the@matchend}%
+ \ifthenelse{\equal{\thestring}{\@matchstring}}%
+% \end{macrocode}
+% Found a match! Save the match location
+% \begin{macrocode}
+ {%
+ \setcounter{@flag}{1}%
+ \addtocounter{@matchloc}{\the@skipped}%
+ \edef\theresult{\the@matchloc}%
+ }%
+% \end{macrocode}
+% False alarm. Determine if lopping off the leading characters of
+% |\@@@@teststring| (to discard the false-alarm occurance) is feasible.
+% If lopping would take one past the end of the string,
+% then no match is possible. If lopping permissible, redefine the
+% string |\@@@@teststring|, keeping track of the total number of
+% lopped-off characters in the counter |@skipped|.
+% \begin{macrocode}
+ {%
+ \addtocounter{@skipped}{\the@matchloc}%
+ \addtocounter{@matchloc}{1}%
+ \ifthenelse{\value{@matchloc} > \value{@matchmax}}%
+ {%
+ \setcounter{@flag}{1}%
+ \edef\theresult{0}%
+ }%
+ {%
+ \substring[e]{\@@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}%
+ \edef\@@@@teststring{\thestring}%
+ }%
+ }%
+ }%
+ }%
+ \if q#1\else\theresult\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\findwords}
+% Finds the number of occurances of a word within the provided string
+% \begin{macrocode}
+% LIKE \findchar, EXCEPT FOR WORDS
+\newcommand\findwords[3][v]{%
+ \+\edef\@@teststring{#2}\?%
+ \edef\@@@teststring{\@@teststring}%
+ \setcounter{@charsfound}{0}%
+ \whiledo{\the@charsfound > -1}{%
+% \end{macrocode}
+% Seek occurance of |#3| in the string to be tested
+% \begin{macrocode}
+ \whereisword[q]{\@@teststring}{#3}%
+ \setcounter{@matchloc}{\theresult}%
+ \ifthenelse{\the@matchloc = 0}%
+ {%
+% \end{macrocode}
+% None found. Break from loop.
+% \begin{macrocode}
+ \edef\theresult{\the@charsfound}%
+ \setcounter{@charsfound}{-1}%
+ }%
+ {%
+% \end{macrocode}
+% Found. Increment count.
+% \begin{macrocode}
+ \addtocounter{@charsfound}{1}%
+ \addtocounter{@matchloc}{\the@matchsize}%
+ \ifthenelse{\the@matchloc > \the@@stringsize}%
+ {%
+% \end{macrocode}
+% This "find" takes us to the end-of-string. Break from loop now.
+% \begin{macrocode}
+ \edef\theresult{\the@charsfound}%
+ \setcounter{@charsfound}{-1}%
+ }%
+ {%
+% \end{macrocode}
+% More string to search. Lop off what has been searched from string to
+% be tested, and re-loop for next search.
+% \begin{macrocode}
+ \substring[e]{\@@@teststring}{\the@matchloc}{\@MAXSTRINGSIZE}%
+ \edef\@@teststring{\thestring}%
+ \edef\@@@teststring{\@@teststring}%
+ }%
+ }%
+ }%
+ \if q#1\else\theresult\fi%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\wordcount}
+% Counts words (space-separated text) in a string. Simply removes one
+% word at a time, counting the words as it goes. With each removal,
+% checks for non-zero string size remaining.
+% \begin{macrocode}
+% WORD COUNT
+\newcommand\wordcount[2][v]{\+%
+ \edef\@argv{#2}
+ \@getstringlength{\@argv}{@stringsize}
+ \setcounter{@iargc}{0}
+ \whiledo{\value{@stringsize} > 0}{%
+ \addtocounter{@iargc}{1}%
+ \removeword[e]{\@argv}%
+ \edef\@argv{\thestring}%
+ \@getstringlength{\@argv}{@stringsize}%
+ }
+ \edef\theresult{\arabic{@iargc}}%
+ \if v#1\theresult\fi%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\getargs}
+% Parse a string of arguments in Unix-like manner. Define |\argv| as |#2|.
+% Grabs leading word from |\argv| and puts it in |\argi|. Increment
+% argument count; remove leading word from |\argv|. Repeat this process,
+% with each new argument being placed in |\argii|, |\argiii|, |\argiv|,
+% \etc~ Continue until size of |\argv| is exhausted.
+% \begin{macrocode}
+% OBTAINS ARGUMENTS (WORDS) IN #1 ALA UNIX getarg COMMAND
+% narg CONTAINS NUMBER OF ARGUMENTS. ARGUMENTS CONTAINED IN
+% argi, argii, argiii, argiv, ETC.
+% v mode disabled
+\newcommand\getargs[2][q]{\+%
+ \if v#1\def\@mode{q}\else\def\@mode{#1}\fi%
+ \edef\@argv{#2}%
+ \@getstringlength{\@argv}{@stringsize}%
+ \setcounter{@iargc}{0}%
+ \whiledo{\value{@stringsize} > 0}{%
+ \addtocounter{@iargc}{1}%
+ \getaword[\@mode]{\@argv}{1}%
+ \expandafter\edef\csname arg\roman{@iargc}\endcsname{\thestring}%
+ \removeword[e]{\@argv}%
+ \edef\@argv{\thestring}%
+ \@getstringlength{\@argv}{@stringsize}%
+ }%
+ \edef\narg{\arabic{@iargc}}%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+%%%%% COMMANDS TO TEST STRINGS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% \end{macrocode}
+
+% The following group of commands test for various alphanumeric
+% string conditions.
+% \begin{macro}{\isnextbyte}
+% This routine performs a simple test to determine if the first byte of
+% string |#3| matches the byte given by |#2|. The only problem is that
+% the test can produce a false negative if the first byte of the test
+% string equals the match byte and the second byte of the test string
+% equals the |SignalChar| (defined below).
+%
+% To resolve this possibility, the test is performed twice with two
+% different values for |\SignalChar|, only one of which can produce
+% a false negative for a given test string. If the two results match,
+% then that result gives the correct answer to the question of whether
+% the first byte of |#3| equals |#2|. If, however, the two results fail
+% to match, then one can assume that one of the results is a false
+% negative, and so a ``true'' condition results.
+% \begin{macrocode}
+% \end{macrocode}
+% The following two ``signal characters,'' used for the two tests,
+% can be any two distinct characters. They are used solely
+% by |\isnextbyte|.
+% \begin{macrocode}
+\def\PrimarySignalChar{@}
+\def\SecondarySignalChar{`}
+
+% \isnextbyte NEEDS TO OPERATE IN RAW (SINGLE BYTE) MODE SO AS TO
+% PERFORM TESTS FOR PRESENCE OF \EscapeChar
+% \end{macrocode}
+% Incidentally,
+% |\isnextbyte| can and is used by \stringstrings to detect
+% multi-byte characters in a manner which may also be employed by the
+% user. To do this:
+% First, the string to be tested should be encoded. Then, |\isnextbyte|
+% may be used to check for |\EscapeChar| which is how every multi-byte
+% character will begin its encoding by the \stringstrings package.
+% If |\EscapeChar| is detected as the next character, then the string to
+% test may have its leading byte gobbled and the next character (called
+% the Escape Code) may be tested, and compared against the known
+% \stringstrings escape codes. The combination of
+% Escape-Character/Escape-Code is how all multi-byte characters are
+% encoded by the \stringstrings package.
+% \begin{macrocode}
+\newcommand\isnextbyte[3][v]{%
+% \end{macrocode}
+% Here's the first test\ldots
+% \begin{macrocode}
+ \let\SignalChar\PrimarySignalChar%
+ \edef\@x{\if #2#3\else\SignalChar\fi}%
+ \edef\@x{\if \SignalChar\@x F\else T\fi}%
+% \end{macrocode}
+% \ldots and the second
+% \begin{macrocode}
+ \let\SignalChar\SecondarySignalChar%
+ \edef\@y{\if #2#3\else\SignalChar\fi}%
+ \edef\@y{\if \SignalChar\@y F\else T\fi}%
+% \end{macrocode}
+% If the two tests produced the same result, then a comparison of |\@x\@y|
+% and |\@y\@x| will show it.
+% \begin{macrocode}
+% BECAUSE THE METHOD ONLY PRODUCES FALSE NEGATIVES, IF RESULTS DON'T
+% AGREE FROM USING TWO DIFFERENT SIGNAL CHARACTERS, RESULT MUST BE TRUE.
+ \ifthenelse{\equal{\@x\@y}{\@y\@x}}
+ {\edef\theresult{\@x}}%
+% CORRECT THE FALSE NEGATIVE
+ {\edef\theresult{T}}%
+ \if q#1\else\theresult\fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testmatchingchar}
+% This routine checks for a specified match-character within a target
+% string. Unlike |\isnextbyte|, this
+% routine checks for characters (single- or multi-byte) and not just
+% individual bytes. Additionally, rather than testing the
+% match-character against the first byte of the test-string, the user
+% specifies (through |#2|) which byte of the test-string should be
+% compared to the match-character.
+%
+% This routine is not as efficient as |\isnextbyte|, but much more
+% versatile.
+% \begin{macrocode}
+% CHECKS TO SEE IF [#2]'th CHARACTER IN STRING [#1] EQUALS [#3]
+% RESULT STORED IN BOOLEAN \ifmatchingchar
+\newif\ifmatchingchar
+\newcommand\testmatchingchar[3]{%
+ \setbox0=\hbox{%
+% \end{macrocode}
+% Extract desired character from test string
+% \begin{macrocode}
+ \substring[e]{#1}{#2}{#2}\+%
+% \end{macrocode}
+% Determine if the match-character is a multi-byte symbol.
+% \begin{macrocode}
+ \isnextbyte[q]{\EscapeChar}{#3}%
+ \if T\theresult%
+% \end{macrocode}
+% Is the tested character also a multi-byte symbol?
+% \begin{macrocode}
+ \isnextbyte[q]{\EscapeChar}{\thestring}%
+ \if T\theresult%
+% \end{macrocode}
+% Yes it is\ldots Therefore, compare codes following the escape character
+% \begin{macrocode}
+ \edef\@testcode{\expandafter\@DiscardNextChar\expandafter{#3}}%
+ \edef\@teststring{\@DiscardNextChar{\thestring}}%
+ \if \@teststring\@testcode\matchingchartrue\else\matchingcharfalse\fi
+ \else
+% \end{macrocode}
+% No, we are comparing a normal character against a multi-byte symbol
+% (apples and oranges), a false comparison.
+% \begin{macrocode}
+ \global\matchingcharfalse%
+ \fi
+ \else
+% \end{macrocode}
+% No, we are comparing two normal one-byte characters, not a mult-byte
+% character.
+% \begin{macrocode}
+ \if \thestring#3\global\matchingchartrue\else\global\matchingcharfalse\fi
+ \fi}%
+\?}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testcapitalized}
+% This routine checks to see if first character of string is
+% capitalized. The only quirk is that the routine must ascertain
+% whether that character is a single-byte character or a multi-byte
+% character.
+% \begin{macrocode}
+\newif\ifcapitalized
+\newcommand\testcapitalized[1]{\+%
+ \setbox0=\hbox{%
+ \isnextbyte[q]{\EscapeChar}{#1}%
+ \if T\theresult%
+ \def\EncodingTreatment{e}%
+ \edef\rotatingword{#1}%
+% \end{macrocode}
+% Rotate the first [multi-byte] character of the string to the end
+% of the string, lowering its case. Store as |\@stringA|.
+% \begin{macrocode}
+ \def\AlphaCapsTreatment{2}%
+ \@defineactions%
+ \edef\@stringA{\ESCrotate{\expandafter\@gobble\rotatingword}}%
+% \end{macrocode}
+% Rotate the first [multi-byte] character of the string to the end
+% of the string, retaining its case. Store as |\@stringB|.
+% \begin{macrocode}
+ \def\AlphaCapsTreatment{1}%
+ \@defineactions%
+ \edef\@stringB{\ESCrotate{\expandafter\@gobble\rotatingword}}%
+ \else
+% \end{macrocode}
+% \ldots or, if the first character is a normal one-byte character\ldots
+% Rotate the first [normal] character of the string to the end
+% of the string, lowering its case. Store as |\@stringA|.
+% \begin{macrocode}
+ \def\AlphaCapsTreatment{2}%
+ \edef\@stringA{\@rotate{#1}}%
+% \end{macrocode}
+% Rotate the first [normal] character of the string to the end
+% of the string, retaining its case. Store as |\@stringB|.
+% \begin{macrocode}
+ \def\AlphaCapsTreatment{1}%
+ \edef\@stringB{\@rotate{#1}}%
+ \fi
+% \end{macrocode}
+% Compare strings A and B, to see if changing the case of first letter
+% altered the string
+% \begin{macrocode}
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {\global\capitalizedfalse}{\global\capitalizedtrue}}\?%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testuncapitalized}
+% This routine is the complement of |\testcapitalized|. The only
+% difference is that the |\@stringA| has its case made upper for the
+% comparison, instead of lowered.
+% \begin{macrocode}
+\newif\ifuncapitalized
+\newcommand\testuncapitalized[1]{\+%
+ \setbox0=\hbox{%
+ \isnextbyte[q]{\EscapeChar}{#1}%
+ \if T\theresult%
+ \def\EncodingTreatment{e}%
+ \edef\rotatingword{#1}%
+ \def\AlphaTreatment{2}%
+ \@defineactions%
+ \edef\@stringA{\ESCrotate{\expandafter\@gobble\rotatingword}}%
+ \def\AlphaTreatment{1}%
+ \@defineactions%
+ \edef\@stringB{\ESCrotate{\expandafter\@gobble\rotatingword}}%
+ \else
+ \def\AlphaTreatment{2}%
+ \edef\@stringA{\@rotate{#1}}%
+ \def\AlphaTreatment{1}%
+ \edef\@stringB{\@rotate{#1}}%
+ \fi
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {\global\uncapitalizedfalse}{\global\uncapitalizedtrue}}\?%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testleadingalpha}
+% Test if the leading character of the string is alphabetic. This is
+% simply accomplished by checking whether the string is either
+% capitalized or uncapitalized. If non-alphabetic, it will show
+% up as false for both those tests.
+% \begin{macrocode}
+\newif\ifleadingalpha
+\newcommand\testleadingalpha[1]{%
+ \testcapitalized{#1}%
+ \ifcapitalized
+ \leadingalphatrue%
+ \else
+ \testuncapitalized{#1}%
+ \ifuncapitalized
+ \leadingalphatrue%
+ \else
+ \leadingalphafalse%
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testuppercase}
+% Checks to see if all alphabetic characters in a string are uppercase.
+% Non-alphabetic characters don't affect the result, unless the string
+% is composed solely of nonalphabetic characters, in which case the test
+% results is false.
+% \begin{macrocode}
+\newif\ifuppercase
+\newcommand\testuppercase[1]{%
+ \setbox0=\hbox{%
+% \end{macrocode}
+% Strip all non-alphabetic characters. Save as |\@stringA|.
+% \begin{macrocode}
+ \Treatments{1}{1}{0}{0}{0}{0}%
+ \substring[e]{#1}{1}{\@MAXSTRINGSIZE}%
+ \edef\@stringA{\thestring}%
+% \end{macrocode}
+% Lower the case of all uppercase characters in |\@stringA|. Save as
+% |\@stringB|. Compare these two strings.
+% \begin{macrocode}
+ \def\AlphaTreatment{2}%
+ \substring[e]{#1}{1}{\@MAXSTRINGSIZE}%
+ \edef\@stringB{\thestring}%
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {%
+% \end{macrocode}
+% If the strings are equal, then all the alphabetic characters in the
+% original string were uppercase. Need only check to make sure at
+% least one alphabetic character was present in the original string.
+% \begin{macrocode}
+ \@getstringlength{\@stringA}{@stringsize}%
+ \ifthenelse{\value{@stringsize} = 0}%
+ {\global\uppercasefalse}{\global\uppercasetrue}%
+ }%
+% \end{macrocode}
+% If strings are not equal, then the alphabetic characters of the
+% original string were not all uppercase. Test false.
+% \begin{macrocode}
+ {\global\uppercasefalse}}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\ifsolelyuppercase}
+% Compare the original string to one made solely uppercase. If they are
+% equal (and not composed solely of blankspaces), then the original
+% string was solely uppercase to begin with.
+% \begin{macrocode}
+\newif\ifsolelyuppercase
+\newcommand\testsolelyuppercase[1]{%
+ \setbox0=\hbox{%
+ \stringencode{#1}%
+ \edef\@stringA{\thestring}%
+ \solelyuppercase[e]{#1}%
+ \edef\@stringB{\thestring}%
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {%
+ \noblanks[q]{\@stringA}%
+ \@getstringlength{\thestring}{@stringsize}%
+ \ifthenelse{\value{@stringsize} = 0}%
+ {\global\solelyuppercasefalse}{\global\solelyuppercasetrue}%
+ }%
+ {\global\solelyuppercasefalse}}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testlowercase}
+% This routine is the complement to |\testuppercase|, with corresponding
+% logic.
+% \begin{macrocode}
+\newif\iflowercase
+\newcommand\testlowercase[1]{%
+ \setbox0=\hbox{%
+ \Treatments{1}{1}{0}{0}{0}{0}%
+ \substring[e]{#1}{1}{\@MAXSTRINGSIZE}%
+ \edef\@stringA{\thestring}%
+ \def\AlphaCapsTreatment{2}%
+ \substring[e]{#1}{1}{\@MAXSTRINGSIZE}%
+ \edef\@stringB{\thestring}%
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {%
+ \@getstringlength{\@stringA}{@stringsize}%
+ \ifnum\value{@stringsize}= 0\relax%
+ \global\lowercasefalse\else\global\lowercasetrue\fi%
+ }%
+ {\global\lowercasefalse}}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testsolelylowercase}
+% This routine is the complement to |\testsolelyuppercase|, with
+% corresponding logic.
+% \begin{macrocode}
+\newif\ifsolelylowercase
+\newcommand\testsolelylowercase[1]{%
+ \setbox0=\hbox{%
+ \stringencode{#1}%
+ \edef\@stringA{\thestring}%
+ \solelylowercase[e]{#1}%
+ \edef\@stringB{\thestring}%
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {%
+ \noblanks[q]{\@stringA}%
+ \@getstringlength{\thestring}{@stringsize}%
+ \ifthenelse{\value{@stringsize} = 0}%
+ {\global\solelylowercasefalse}{\global\solelylowercasetrue}%
+ }%
+ {\global\solelylowercasefalse}}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\testalphabetic}
+% Comparable to |\testsolelyuppercase| and
+% |\testsolelylowercase| in its logic, this routine tests whether
+% the string is purely alphabetic or not.
+% \begin{macrocode}
+\newif\ifalphabetic
+\newcommand\testalphabetic[1]{%
+ \setbox0=\hbox{%
+ \stringencode{#1}%
+ \edef\@stringA{\thestring}%
+ \alphabetic[e]{#1}%
+ \edef\@stringB{\thestring}%
+ \ifthenelse{\equal{\@stringA}{\@stringB}}%
+ {%
+ \noblanks[q]{\@stringA}%
+ \@getstringlength{\thestring}{@stringsize}%
+ \ifthenelse{\value{@stringsize} = 0}%
+ {\global\alphabeticfalse}{\global\alphabetictrue}%
+ }%
+ {\global\alphabeticfalse}}%
+ \defaultTreatments%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+%
+%%%%% SUPPORT ROUTINES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% \end{macrocode}
+% The following routines support the execution of the \stringstrings
+% package.
+
+% \begin{macro}{\ESCrotate}
+% After the escape character has been ascertained as the next character,
+% this routine operates on the subsequent escape code to rotate the
+% symbol to end of string, in the fashion of macro |\@rotate|.
+% \begin{macrocode}
+\newcommand\ESCrotate[1]{%
+ \if\UvariCode#1\@uvariaction\else
+ \if\UvariiCode#1\@uvariiaction\else
+ \if\UvariiiCode#1\@uvariiiaction\else
+ \if\@fromcode#1\@tostring\else
+ \if\PipeCode#1\@pipeaction\else
+ \if\DollarCode#1\@dollaraction\else
+ \if\CaratCode#1\@carataction\else
+ \if\CircumflexCode#1\@circumflexaction\else
+ \if\TildeCode#1\@tildeaction\else
+ \if\UmlautCode#1\@umlautaction\else
+ \if\GraveCode#1\@graveaction\else
+ \if\AcuteCode#1\@acuteaction\else
+ \if\MacronCode#1\@macronaction\else
+ \if\OverdotCode#1\@overdotaction\else
+ \if\LeftBraceCode#1\@leftbraceaction\else
+ \if\RightBraceCode#1\@rightbraceaction\else
+ \if\UnderscoreCode#1\@underscoreaction\else
+ \if\DaggerCode#1\@daggeraction\else
+ \if\DoubleDaggerCode#1\@doubledaggeraction\else
+ \if\SectionSymbolCode#1\@sectionsymbolaction\else
+ \if\PilcrowCode#1\@pilcrowaction\else
+ \if\LBCode#1\@lbaction\else
+ \if\RBCode#1\@rbaction\else
+ \if\BreveCode#1\@breveaction\else
+ \if\CaronCode#1\@caronaction\else
+ \if\DoubleAcuteCode#1\@doubleacuteaction\else
+ \if\CedillaCode#1\@cedillaaction\else
+ \if\UnderdotCode#1\@underdotaction\else
+ \if\ArchJoinCode#1\@archjoinaction\else
+ \if\LineUnderCode#1\@lineunderaction\else
+ \if\CopyrightCode#1\@copyrightaction\else
+ \if\PoundsCode#1\@poundsaction\else
+ \if\AEscCode#1\@AEscaction\else
+ \if\aescCode#1\@aescaction\else
+ \if\OEthelCode#1\@OEthelaction\else
+ \if\oethelCode#1\@oethelaction\else
+ \if\AngstromCode#1\@Angstromaction\else
+ \if\angstromCode#1\@angstromaction\else
+ \if\SlashedOCode#1\@slashedOaction\else
+ \if\SlashedoCode#1\@slashedoaction\else
+ \if\BarredlCode#1\@barredlaction\else
+ \if\BarredLCode#1\@barredLaction\else
+ \if\EszettCode#1\@eszettaction\else
+ \expandafter\@gobble#1\undecipherable%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@getnextword}
+% A low-level routine designed to extract the next [space-delimited]
+% word of the primary
+% argument. It has several quirks: if the passed string has one leading
+% space, it is included as part of next word. If it has two leading
+% [hard]spaces, the 2$^\mathrm{nd}$ hard space \textit{is} the next word.
+% Using the higher-level |\getnextword| deals automatically with
+% these abberant possibilities.
+% \begin{macrocode}
+\newcommand\@getnextword[2][v]{%
+ \defaultTreatments%
+ \def\SeekBlankSpace{2}%
+ \substring[#1]{#2}{1}{\@MAXSTRINGSIZE}%
+ \def\SeekBlankSpace{0}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@retokenizechar}
+% This command is the guts of the retokenize command. It grabs the
+% character provided in string |#1| and assigns it to a unique token
+% whose name is created from the string |#2|. The command has two
+% primary |\if| branches. The first branch is taken if the
+% character is a special two-byte-encoded escape-sequence, while
+% the second branch is taken if the character is a |&|, |%|, |#|,
+% a blankspace, or any simple one-byte character.
+% \begin{macrocode}
+\newcommand\@retokenizechar[2]{%
+ \isnextbyte[q]{\EscapeChar}{#1}%
+ \if T\theresult%
+ \edef\@ESCcode{\expandafter\@gobble#1}%
+ \if\UvariCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\Uvari}\else
+ \if\UvariiCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\Uvarii}\else
+ \if\UvariiiCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\Uvariii}\else
+ \if\PipeCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\Pipe}\else
+ \if\DollarCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\$}\else
+ \if\CaratCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\Carat}\else
+ \if\CircumflexCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\^}\else
+ \if\TildeCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\~}\else
+ \if\UmlautCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\"}\else
+ \if\GraveCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\`}\else
+ \if\AcuteCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\'}\else
+ \if\MacronCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\=}\else
+ \if\OverdotCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\.}\else
+ \if\LeftBraceCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\{}\else
+ \if\RightBraceCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\}}\else
+ \if\UnderscoreCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\_}\else
+ \if\DaggerCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\dag}\else
+ \if\DoubleDaggerCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\ddag}\else
+ \if\SectionSymbolCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\S}\else
+ \if\PilcrowCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\P}\else
+ \if\LBCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\SaveLB}\else
+ \if\RBCode\@ESCcode%
+ \expandafter\def\csname#2\endcsname{\SaveRB}\else
+ \if\BreveCode\@ESCcode\expandafter\def\csname#2\endcsname{\u}\else
+ \if\CaronCode\@ESCcode\expandafter\def\csname#2\endcsname{\v}\else
+ \if\DoubleAcuteCode\@ESCcode\expandafter\def\csname#2\endcsname{\H}\else
+ \if\CedillaCode\@ESCcode\expandafter\def\csname#2\endcsname{\c}\else
+ \if\UnderdotCode\@ESCcode\expandafter\def\csname#2\endcsname{\d}\else
+ \if\ArchJoinCode\@ESCcode\expandafter\def\csname#2\endcsname{\t}\else
+ \if\LineUnderCode\@ESCcode\expandafter\def\csname#2\endcsname{\b}\else
+ \if\CopyrightCode\@ESCcode\expandafter\def\csname#2\endcsname{\copyright}\else
+ \if\PoundsCode\@ESCcode\expandafter\def\csname#2\endcsname{\pounds}\else
+ \if\AEscCode\@ESCcode\expandafter\def\csname#2\endcsname{\AE}\else
+ \if\aescCode\@ESCcode\expandafter\def\csname#2\endcsname{\ae}\else
+ \if\OEthelCode\@ESCcode\expandafter\def\csname#2\endcsname{\OE}\else
+ \if\oethelCode\@ESCcode\expandafter\def\csname#2\endcsname{\oe}\else
+ \if\AngstromCode\@ESCcode\expandafter\def\csname#2\endcsname{\AA}\else
+ \if\angstromCode\@ESCcode\expandafter\def\csname#2\endcsname{\aa}\else
+ \if\SlashedOCode\@ESCcode\expandafter\def\csname#2\endcsname{\O}\else
+ \if\SlashedoCode\@ESCcode\expandafter\def\csname#2\endcsname{\o}\else
+ \if\BarredlCode\@ESCcode\expandafter\def\csname#2\endcsname{\l}\else
+ \if\BarredLCode\@ESCcode\expandafter\def\csname#2\endcsname{\L}\else
+ \if\EszettCode\@ESCcode\expandafter\def\csname#2\endcsname{\ss}\else
+ \expandafter\def\csname#2\endcsname{\undecipherable}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \else
+ \expandafter\ifx\expandafter\%
+ \expandafter\def\csname#2\endcsname{\&}\else
+ \expandafter\ifx\expandafter\%#1%
+ \expandafter\def\csname#2\endcsname{\%}\else
+ \expandafter\ifx\expandafter\##1%
+ \expandafter\def\csname#2\endcsname{\#}\else
+ \if\EncodedBlankSpace#1\expandafter\def\csname#2\endcsname{\ }\else
+ \expandafter\edef\csname#2\endcsname{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@defineactions}
+% This routine defines how encoded characters are to be treated by the
+% |\ESCrotate| routine, depending on the [encoding, capitalization,
+% blank, symbol, \textit{etc.}] treatments that have
+% been \textit{a priori} specified.
+% \begin{macrocode}
+% \@blankaction AND OTHER ...action'S ARE SET, DEPENDING ON VALUES OF
+% TREATMENT FLAGS. CHARS ARE EITHER ENCODED, DECODED, OR REMOVED.
+\newcommand\@defineactions{%
+% SET UP TREATMENT FOR SPACES, ENCODED SPACES, AND [REENCODED] SYMBOLS
+ \if e\EncodingTreatment%
+% ENCODE SPACES, KEEP ENCODED SPACES ENCODED, ENCODE SYMBOLS.
+ \edef\@blankaction{\EncodedBlankSpace}%
+ \def\@dollaraction{\EncodedDollar}%
+ \def\@pipeaction{\EncodedPipe}%
+ \def\@uvariaction{\EncodedUvari}%
+ \def\@uvariiaction{\EncodedUvarii}%
+ \def\@uvariiiaction{\EncodedUvariii}%
+ \def\@carataction{\EncodedCarat}%
+ \def\@circumflexaction{\EncodedCircumflex}%
+ \def\@tildeaction{\EncodedTilde}%
+ \def\@umlautaction{\EncodedUmlaut}%
+ \def\@graveaction{\EncodedGrave}%
+ \def\@acuteaction{\EncodedAcute}%
+ \def\@macronaction{\EncodedMacron}%
+ \def\@overdotaction{\EncodedOverdot}%
+ \def\@breveaction{\EncodedBreve}%
+ \def\@caronaction{\EncodedCaron}%
+ \def\@doubleacuteaction{\EncodedDoubleAcute}%
+ \def\@cedillaaction{\EncodedCedilla}%
+ \def\@underdotaction{\EncodedUnderdot}%
+ \def\@archjoinaction{\EncodedArchJoin}%
+ \def\@lineunderaction{\EncodedLineUnder}%
+ \def\@copyrightaction{\EncodedCopyright}%
+ \def\@poundsaction{\EncodedPounds}%
+ \def\@leftbraceaction{\EncodedLeftBrace}%
+ \def\@rightbraceaction{\EncodedRightBrace}%
+ \def\@underscoreaction{\EncodedUnderscore}%
+ \def\@daggeraction{\EncodedDagger}%
+ \def\@doubledaggeraction{\EncodedDoubleDagger}%
+ \def\@sectionsymbolaction{\EncodedSectionSymbol}%
+ \def\@pilcrowaction{\EncodedPilcrow}%
+ \def\@eszettaction{\EncodedEszett}%
+ \def\@lbaction{\EncodedLB}%
+ \def\@rbaction{\EncodedRB}%
+ \if 2\AlphaCapsTreatment%
+ \def\@AEscaction{\Encodedaesc}%
+ \def\@OEthelaction{\Encodedoethel}%
+ \def\@Angstromaction{\Encodedangstrom}%
+ \def\@slashedOaction{\EncodedSlashedo}%
+ \def\@barredLaction{\EncodedBarredl}%
+ \else
+ \def\@AEscaction{\EncodedAEsc}%
+ \def\@OEthelaction{\EncodedOEthel}%
+ \def\@Angstromaction{\EncodedAngstrom}%
+ \def\@slashedOaction{\EncodedSlashedO}%
+ \def\@barredLaction{\EncodedBarredL}%
+ \fi
+ \if 2\AlphaTreatment%
+ \def\@aescaction{\EncodedAEsc}%
+ \def\@oethelaction{\EncodedOEthel}%
+ \def\@angstromaction{\EncodedAngstrom}%
+ \def\@slashedoaction{\EncodedSlashedO}%
+ \def\@barredlaction{\EncodedBarredL}%
+ \else
+ \def\@aescaction{\Encodedaesc}%
+ \def\@oethelaction{\Encodedoethel}%
+ \def\@angstromaction{\Encodedangstrom}%
+ \def\@slashedoaction{\EncodedSlashedo}%
+ \def\@barredlaction{\EncodedBarredl}%
+ \fi
+ \else
+% EncodingTreatment=v or q:
+% LEAVE SPACES ALONE; RESTORE ENCODED SPACES AND SYMBOLS
+ \def\@blankaction{\BlankSpace}%
+ \def\@dollaraction{\Dollar}%
+ \def\@pipeaction{\Pipe}%
+ \def\@uvariaction{\Uvari}%
+ \def\@uvariiaction{\Uvarii}%
+ \def\@uvariiiaction{\Uvariii}%
+ \def\@carataction{\Carat}%
+ \def\@circumflexaction{\Circumflex}%
+ \def\@tildeaction{\Tilde}%
+ \def\@umlautaction{\Umlaut}%
+ \def\@graveaction{\Grave}%
+ \def\@acuteaction{\Acute}%
+ \def\@macronaction{\Macron}%
+ \def\@overdotaction{\Overdot}%
+ \def\@breveaction{\Breve}%
+ \def\@caronaction{\Caron}%
+ \def\@doubleacuteaction{\DoubleAcute}%
+ \def\@cedillaaction{\Cedilla}%
+ \def\@underdotaction{\Underdot}%
+ \def\@archjoinaction{\ArchJoin}%
+ \def\@lineunderaction{\LineUnder}%
+ \def\@copyrightaction{\Copyright}%
+ \def\@poundsaction{\Pounds}%
+ \def\@leftbraceaction{\LeftBrace}%
+ \def\@rightbraceaction{\RightBrace}%
+ \def\@underscoreaction{\Underscore}%
+ \def\@daggeraction{\Dagger}%
+ \def\@doubledaggeraction{\DoubleDagger}%
+ \def\@sectionsymbolaction{\SectionSymbol}%
+ \def\@pilcrowaction{\Pilcrow}%
+ \def\@eszettaction{\Eszett}%
+ \def\@lbaction{\UnencodedLB}%
+ \def\@rbaction{\UnencodedRB}%
+ \if 2\AlphaCapsTreatment%
+ \def\@AEscaction{\aesc}%
+ \def\@OEthelaction{\oethel}%
+ \def\@Angstromaction{\angstrom}%
+ \def\@slashedOaction{\Slashedo}%
+ \def\@barredLaction{\Barredl}%
+ \else
+ \def\@AEscaction{\AEsc}%
+ \def\@OEthelaction{\OEthel}%
+ \def\@Angstromaction{\Angstrom}%
+ \def\@slashedOaction{\SlashedO}%
+ \def\@barredLaction{\BarredL}%
+ \fi
+ \if 2\AlphaTreatment%
+ \def\@aescaction{\AEsc}%
+ \def\@oethelaction{\OEthel}%
+ \def\@angstromaction{\Angstrom}%
+ \def\@slashedoaction{\SlashedO}%
+ \def\@barredlaction{\BarredL}%
+ \else
+ \def\@aescaction{\aesc}%
+ \def\@oethelaction{\oethel}%
+ \def\@angstromaction{\angstrom}%
+ \def\@slashedoaction{\Slashedo}%
+ \def\@barredlaction{\Barredl}%
+ \fi
+ \fi
+% REMOVE SPACES AND ENCODED SPACES?
+ \if 0\BlankTreatment%
+ \edef\@blankaction{}%
+ \fi
+% REMOVE ENCODED SYMBOLS?
+ \if 0\SymbolTreatment%
+ \def\@dollaraction{}%
+ \def\@pipeaction{}%
+ \def\@carataction{}%
+ \def\@circumflexaction{}%
+ \def\@tildeaction{}%
+ \def\@umlautaction{}%
+ \def\@graveaction{}%
+ \def\@acuteaction{}%
+ \def\@macronaction{}%
+ \def\@overdotaction{}%
+ \def\@breveaction{}%
+ \def\@caronaction{}%
+ \def\@doubleacuteaction{}%
+ \def\@cedillaaction{}%
+ \def\@underdotaction{}%
+ \def\@archjoinaction{}%
+ \def\@lineunderaction{}%
+ \def\@copyrightaction{}%
+ \def\@poundsaction{}%
+ \def\@leftbraceaction{}%
+ \def\@rightbraceaction{}%
+ \def\@underscoreaction{}%
+ \def\@daggeraction{}%
+ \def\@doubledaggeraction{}%
+ \def\@sectionsymbolaction{}%
+ \def\@pilcrowaction{}%
+ \def\@lbaction{}%
+ \def\@rbaction{}%
+ \fi
+% REMOVE ENCODED ALPHACAPS?
+ \if 0\AlphaCapsTreatment%
+ \def\@AEscaction{}%
+ \def\@OEthelaction{}%
+ \def\@Angstromaction{}%
+ \def\@slashedOaction{}%
+ \def\@barredLaction{}%
+ \fi
+% REMOVE ENCODED ALPHA?
+ \if 0\AlphaTreatment%
+ \def\@aescaction{}%
+ \def\@oethelaction{}%
+ \def\@angstromaction{}%
+ \def\@slashedoaction{}%
+ \def\@barredlaction{}%
+ \def\@eszettaction{}%
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@forcecapson}
+% Force capitalization of strings processed by |\substring| for the
+% time being.
+% \begin{macrocode}
+\newcommand\@forcecapson{%
+ \def\AlphaTreatment{2}%
+ \def\AlphaCapsTreatment{1}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@relaxcapson}
+% Restore prior treatments following a period of enforced capitalization.
+% \begin{macrocode}
+\newcommand\@relaxcapson{%
+ \let\AlphaTreatment\SaveAlphaTreatment%
+ \let\AlphaCapsTreatment\SaveAlphaCapsTreatment%
+ \@defineactions%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@decodepointer}
+% As pertains to arguments 3 and 4 of |\substring|, this routine
+% implements use of the |$| character to mean END-OF-STRING,
+% and |$-{|\textit{integer}|}| for addressing relative to the
+% END-OF-STRING.
+% \begin{macrocode}
+\newcommand\@decodepointer[2][\value{@stringsize}]{%
+ \isnextbyte[q]{$}{#2}%
+ \if T\theresult%
+ \isnextbyte[q]{-}{\expandafter\@gobble#2}%
+ \if T\theresult%
+ \setcounter{@@@letterindex}{#1}%
+ \@gobblearg{#2}{2}%
+ \addtocounter{@@@letterindex}{-\gobbledword}%
+ \edef\@fromtoindex{\value{@@@letterindex}}%
+ \else
+ \edef\@fromtoindex{#1}%
+ \fi
+ \else
+ \edef\@fromtoindex{#2}%
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@getstringlength}
+% Get's string length of |#1|, puts result in counter |#2|.
+% \begin{macrocode}
+\newcommand\@getstringlength[2]{%
+ \edef\@@teststring{#1\endofstring}%
+ \ifthenelse{\equal{\@@teststring}{\endofstring}}%
+ {\setcounter{#2}{0}}%
+ {%
+ \setcounter{@gobblesize}{1}%
+ \whiledo{\value{@gobblesize} < \@MAXSTRINGSIZE}{%
+%
+ \@gobblearg{\@@teststring}{1}%
+ \edef\@@teststring{\gobbledword}%
+ \ifthenelse{\equal{\@@teststring}{\endofstring}}%
+ {\setcounter{#2}{\value{@gobblesize}}%
+ \setcounter{@gobblesize}{\@MAXSTRINGSIZE}}%
+ {\addtocounter{@gobblesize}{1}}%
+ }%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@gobblearg}
+% Gobble first |#2| characters from string |#1|. The
+% result is stored in |\gobbledword|. Two-byte escape sequences,
+% when encountered, count as a single gobble.
+% \begin{macrocode}
+\newcommand\@gobblearg[2]{%
+ \setcounter{@letterindex}{0}%
+ \setcounter{@gobbleindex}{#2}%
+ \edef\gobbledword{#1}%
+ \whiledo{\value{@letterindex} < \value{@gobbleindex}}{%
+ \isnextbyte[q]{\EscapeChar}{\gobbledword}%
+ \if T\theresult%
+% GOBBLE ESCAPE CHARACTER
+ \edef\gobbledword{\@DiscardNextChar{\gobbledword}}%
+ \fi
+% GOBBLE NORMAL CHARACTER OR ESCAPE CODE
+ \edef\gobbledword{\@DiscardNextChar{\gobbledword}}%
+ \addtocounter{@letterindex}{1}%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@DiscardNextChar}
+% Remove the next character from the argument string. Since
+% |\@gobble| skips spaces, the routine must first look for the case of
+% a leading blankspace. If none is found, proceed with a normal
+% |\@gobble|. Note: as per \LaTeX{} convention, |\@DiscardNextChar|
+% treats double/multi-softspaces as single space.
+% \begin{macrocode}
+\newcommand\@DiscardNextChar[1]{%
+ \expandafter\if\expandafter\BlankSpace#1\else
+ \expandafter\@gobble#1%
+ \fi
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@convertsymboltostring}
+% Routine for converting an encodable symbol (|#3|) into string (|#4|),
+% for every occurance in the given string |#2|.
+% \begin{macrocode}
+\newcommand\@convertsymboltostring[4][v]{%
+ \def\@fromcode{#3}%
+ \def\@tostring{#4}%
+ \def\EncodingTreatment{e}%
+ \substring[e]{#2}{1}{\@MAXSTRINGSIZE}%
+ \@convertoff%
+ \if e#1\else\substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}\fi%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@convertbytetostring}
+% Routine for converting an plain byte (|#3|) into string (|#4|),
+% for every occurance in the given string |#2|.
+% \begin{macrocode}
+\newcommand\@convertbytetostring[4][v]{%
+ \def\@frombyte{#3}%
+ \def\@tostring{#4}%
+ \def\EncodingTreatment{e}%
+ \substring[e]{#2}{1}{\@MAXSTRINGSIZE}%
+ \@convertoff%
+ \if e#1\else\substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}\fi%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@treatleadingspaces}
+% This routine will address the leading spaces of string |#2|. If
+% argument |#3| is an 'x' character, those leading spaces will be
+% deleted from the string. Otherwise, those leading spaces will be
+% rotated to the end of the string.
+% \begin{macrocode}
+\newcommand\@treatleadingspaces[3][v]{\+%
+ \defaultTreatments%
+ \edef\thestring{#2}%
+ \@getstringlength{\thestring}{@stringsize}%
+ \setcounter{@maxrotation}{\value{@stringsize}}%
+ \setcounter{@letterindex}{0}%
+ \whiledo{\value{@letterindex} < \value{@maxrotation}}{%
+ \addtocounter{@letterindex}{1}%
+ \isnextbyte[q]{\EncodedBlankSpace}{\thestring}%
+ \if F\theresult\isnextbyte[q]{\BlankSpace}{\thestring}\fi%
+ \if T\theresult%
+ \isnextbyte[q]{#3}{x}%
+ \if F\theresult%
+% NORMAL OR ENCODED BLANK... ROTATE IT
+ \edef\thestring{\@rotate{\thestring}}%
+ \else
+% NORMAL OR ENCODED BLANK... DELETE IT (IF 3rd ARG=X)
+ \@gobblearg{\thestring}{1}%
+ \edef\thestring{\gobbledword}%
+ \fi
+ \else
+ \setcounter{@maxrotation}{\value{@letterindex}}%
+ \fi
+ }\?%
+ \substring[#1]{\thestring}{1}{\@MAXSTRINGSIZE}%
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@convertoff}
+% This routine is an initialization routine to
+% guarantee that there is no conversion of |\@frombyte| to |\@tostring|,
+% until further notice. It accomplishes this
+% by setting up such that subsequent |\if\@frombyte| and
+% |\if\@fromcode| clauses will automatically fail.
+% \begin{macrocode}
+\newcommand\@convertoff{\def\@frombyte{xy}\def\@tostring{}%
+ \def\@fromcode{xy}}
+\@convertoff
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macro}{\@rotate}
+% The following code is the engine of the string manipulation routine.
+% It is a tree of successive \LaTeX{} commands (each of which is
+% composed of an |\if...| cascade) which have the net
+% effect of rotating the first letter of the string into the last
+% position. Depending on modes set by |\@defineactions| and
+% |\defaultTreatments|, the leading character is either encoded,
+% decoded, or removed in the process.
+% Note: |\@rotate| loses track of double/multi-spaces, per \LaTeX{}
+% convention, unless encoded blanks (|~|) are used.
+% \begin{macrocode}
+\newcommand\@rotate[1]{%
+% CHECK BYTE CONVERSION TEST FIRST
+ \if \@frombyte#1\@tostring\else
+% MUST CHECK FOR MULTI-BYTE CHARACTERS NEXT, SO THAT ENCODING CHARACTER
+% ISN'T MISTAKEN FOR A NORMAL CHARACTER LATER IN MACRO.
+ \if 0\SymbolTreatment%
+ \@removeExpandableSymbols{#1}%
+ \else
+ \@rotateExpandableSymbols{#1}%
+ \fi
+ \fi
+}
+
+\newcommand\@rotateExpandableSymbols[1]{%
+% INDIRECT (EXPANDABLE) SYMBOLS
+ \expandafter\ifx\expandafter\\&\else
+ \expandafter\ifx\expandafter\%#1\%\else
+ \expandafter\ifx\expandafter\##1\#\else
+ \@rotateBlankSpaces{#1}%
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removeExpandableSymbols[1]{%
+% INDIRECT (EXPANDABLE) SYMBOLS
+ \expandafter\ifx\expandafter\\else
+ \expandafter\ifx\expandafter\%#1\else
+ \expandafter\ifx\expandafter\##1\else
+ \@rotateBlankSpaces{#1}%
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateBlankSpaces[1]{%
+ \expandafter\ifx\expandafter$#1$\else% <---RETAIN GOING INTO/FROM MATH MODE
+% THE FOLLOWING FINDS TILDES, BUT MUST COME AFTER EXPANDABLE SYMBOL
+% SEARCH, OR ELSE IT FINDS THEM TOO, BY MISTAKE.
+ \if \EncodedBlankSpace#1\@blankaction\else% <--- FINDS REENCODED TILDE
+% THE FOLLOWING SHOULD FIND TILDES, BUT DOESN'T... THUS, COMMENTED OUT.
+% \expandafter\ifx\expandafter\EncodedBlankSpace#1\@blankaction\else
+ \if \BlankSpace#1\@blankaction\else
+ \if 2\AlphaTreatment%
+ \@chcaseAlpha{#1}%
+ \else
+ \if 0\AlphaTreatment%
+ \@removeAlpha{#1}%
+ \else
+ \@rotateAlpha{#1}%
+ \fi
+ \fi
+ \fi
+% \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateAlpha[1]{%
+% LOWERCASE
+ \if a#1a\else
+ \if b#1b\else
+ \if c#1c\else
+ \if d#1d\else
+ \if e#1e\else
+ \if f#1f\else
+ \if g#1g\else
+ \if h#1h\else
+ \if i#1i\else
+ \if j#1j\else
+ \if k#1k\else
+ \if l#1l\else
+ \if m#1m\else
+ \if n#1n\else
+ \if o#1o\else
+ \if p#1p\else
+ \if q#1q\else
+ \if r#1r\else
+ \if s#1s\else
+ \if t#1t\else
+ \if u#1u\else
+ \if v#1v\else
+ \if w#1w\else
+ \if x#1x\else
+ \if y#1y\else
+ \if z#1z\else
+ \if 2\AlphaCapsTreatment%
+ \@chcaseAlphaCaps{#1}%
+ \else
+ \if 0\AlphaCapsTreatment%
+ \@removeAlphaCaps{#1}%
+ \else
+ \@rotateAlphaCaps{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removeAlpha[1]{%
+% LOWERCASE
+ \if a#1\else
+ \if b#1\else
+ \if c#1\else
+ \if d#1\else
+ \if e#1\else
+ \if f#1\else
+ \if g#1\else
+ \if h#1\else
+ \if i#1\else
+ \if j#1\else
+ \if k#1\else
+ \if l#1\else
+ \if m#1\else
+ \if n#1\else
+ \if o#1\else
+ \if p#1\else
+ \if q#1\else
+ \if r#1\else
+ \if s#1\else
+ \if t#1\else
+ \if u#1\else
+ \if v#1\else
+ \if w#1\else
+ \if x#1\else
+ \if y#1\else
+ \if z#1\else
+ \if 2\AlphaCapsTreatment%
+ \@chcaseAlphaCaps{#1}%
+ \else
+ \if 0\AlphaCapsTreatment%
+ \@removeAlphaCaps{#1}%
+ \else
+ \@rotateAlphaCaps{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@chcaseAlpha[1]{%
+% LOWERCASE TO UPPERCASE
+ \if a#1A\else
+ \if b#1B\else
+ \if c#1C\else
+ \if d#1D\else
+ \if e#1E\else
+ \if f#1F\else
+ \if g#1G\else
+ \if h#1H\else
+ \if i#1I\else
+ \if j#1J\else
+ \if k#1K\else
+ \if l#1L\else
+ \if m#1M\else
+ \if n#1N\else
+ \if o#1O\else
+ \if p#1P\else
+ \if q#1Q\else
+ \if r#1R\else
+ \if s#1S\else
+ \if t#1T\else
+ \if u#1U\else
+ \if v#1V\else
+ \if w#1W\else
+ \if x#1X\else
+ \if y#1Y\else
+ \if z#1Z\else
+ \if 2\AlphaCapsTreatment%
+ \@chcaseAlphaCaps{#1}%
+ \else
+ \if 0\AlphaCapsTreatment%
+ \@removeAlphaCaps{#1}%
+ \else
+ \@rotateAlphaCaps{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateAlphaCaps[1]{%
+% UPPERCASE
+ \if A#1A\else
+ \if B#1B\else
+ \if C#1C\else
+ \if D#1D\else
+ \if E#1E\else
+ \if F#1F\else
+ \if G#1G\else
+ \if H#1H\else
+ \if I#1I\else
+ \if J#1J\else
+ \if K#1K\else
+ \if L#1L\else
+ \if M#1M\else
+ \if N#1N\else
+ \if O#1O\else
+ \if P#1P\else
+ \if Q#1Q\else
+ \if R#1R\else
+ \if S#1S\else
+ \if T#1T\else
+ \if U#1U\else
+ \if V#1V\else
+ \if W#1W\else
+ \if X#1X\else
+ \if Y#1Y\else
+ \if Z#1Z\else
+ \if 0\NumeralTreatment%
+ \@removeNumerals{#1}%
+ \else
+ \@rotateNumerals{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removeAlphaCaps[1]{%
+% UPPERCASE
+ \if A#1\else
+ \if B#1\else
+ \if C#1\else
+ \if D#1\else
+ \if E#1\else
+ \if F#1\else
+ \if G#1\else
+ \if H#1\else
+ \if I#1\else
+ \if J#1\else
+ \if K#1\else
+ \if L#1\else
+ \if M#1\else
+ \if N#1\else
+ \if O#1\else
+ \if P#1\else
+ \if Q#1\else
+ \if R#1\else
+ \if S#1\else
+ \if T#1\else
+ \if U#1\else
+ \if V#1\else
+ \if W#1\else
+ \if X#1\else
+ \if Y#1\else
+ \if Z#1\else
+ \if 0\NumeralTreatment%
+ \@removeNumerals{#1}%
+ \else
+ \@rotateNumerals{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@chcaseAlphaCaps[1]{%
+% UPPERCASE TO LOWERCASE
+ \if A#1a\else
+ \if B#1b\else
+ \if C#1c\else
+ \if D#1d\else
+ \if E#1e\else
+ \if F#1f\else
+ \if G#1g\else
+ \if H#1h\else
+ \if I#1i\else
+ \if J#1j\else
+ \if K#1k\else
+ \if L#1l\else
+ \if M#1m\else
+ \if N#1n\else
+ \if O#1o\else
+ \if P#1p\else
+ \if Q#1q\else
+ \if R#1r\else
+ \if S#1s\else
+ \if T#1t\else
+ \if U#1u\else
+ \if V#1v\else
+ \if W#1w\else
+ \if X#1x\else
+ \if Y#1y\else
+ \if Z#1z\else
+ \if 0\NumeralTreatment%
+ \@removeNumerals{#1}%
+ \else
+ \@rotateNumerals{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateNumerals[1]{%
+% NUMERALS
+ \if 1#11\else
+ \if 2#12\else
+ \if 3#13\else
+ \if 4#14\else
+ \if 5#15\else
+ \if 6#16\else
+ \if 7#17\else
+ \if 8#18\else
+ \if 9#19\else
+ \if 0#10\else
+ \if 0\PunctuationTreatment%
+ \@removePunctuation{#1}%
+ \else
+ \@rotatePunctuation{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removeNumerals[1]{%
+% NUMERALS
+ \if 1#1\else
+ \if 2#1\else
+ \if 3#1\else
+ \if 4#1\else
+ \if 5#1\else
+ \if 6#1\else
+ \if 7#1\else
+ \if 8#1\else
+ \if 9#1\else
+ \if 0#1\else
+ \if 0\PunctuationTreatment%
+ \@removePunctuation{#1}%
+ \else
+ \@rotatePunctuation{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotatePunctuation[1]{%
+% PUNCTUATION
+ \if ;#1;\else
+ \if :#1:\else
+ \if '#1'\else
+ \if "#1"\else
+ \if ,#1,\else
+ \if .#1.\else
+ \if ?#1?\else
+ \if `#1`\else
+ \if !#1!\else
+ \if 0\SymbolTreatment%
+ \@removeDirectSymbols{#1}%
+ \else
+ \@rotateDirectSymbols{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removePunctuation[1]{%
+% PUNCTUATION
+ \if ;#1\else
+ \if :#1\else
+ \if '#1\else
+ \if "#1\else
+ \if ,#1\else
+ \if .#1\else
+ \if ?#1\else
+ \if `#1\else
+ \if !#1\else
+ \if 0\SymbolTreatment%
+ \@removeDirectSymbols{#1}%
+ \else
+ \@rotateDirectSymbols{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateDirectSymbols[1]{%
+% DIRECT SYMBOLS
+ \if /#1/\else
+ \if @#1@\else
+ \if *#1*\else
+ \if (#1(\else
+ \if )#1)\else
+ \if -#1-\else
+ \if _#1_\else
+ \if =#1=\else
+ \if +#1+\else
+ \if [#1[\else
+ \if ]#1]\else
+ \if ^#1^\else% <--FOR SUPERSCRIPTS, NOT \^
+ \if <#1<\else
+ \if >#1>\else
+ \if |#1|\else
+ \if &\else
+ \@rotateUndecipherable{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@removeDirectSymbols[1]{%
+% DIRECT SYMBOLS
+ \if /#1\else
+ \if @#1\else
+ \if *#1\else
+ \if (#1\else
+ \if )#1\else
+ \if -#1\else
+ \if _#1\else
+ \if =#1\else
+ \if +#1\else
+ \if [#1\else
+ \if ]#1\else
+ \if ^#1\else% <--FOR SUPERSCRIPTS, NOT \^
+ \if <#1\else
+ \if >#1\else
+ \if |#1\else
+ \if \else
+ \@rotateUndecipherable{#1}%
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+ \fi
+}
+
+\newcommand\@rotateUndecipherable[1]{%
+% REPLACE UNDECIPHERABLE SYMBOL WITH A TOKEN CHARACTER (DEFAULT .)
+ \expandafter\@gobble#1\undecipherable%
+% DONE... CLOSE UP SHOP
+}
+% \end{macrocode}
+% \end{macro}
+
+% \begin{macrocode}
+\catcode`\&=4
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%</package>
+% \end{macrocode}
+%
+% \Finale
+\endinput
+%
+% End of file `stringstrings.dtx'.
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