diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/emacs-modes/weave.ch |
Initial commit
Diffstat (limited to 'support/emacs-modes/weave.ch')
-rw-r--r-- | support/emacs-modes/weave.ch | 626 |
1 files changed, 626 insertions, 0 deletions
diff --git a/support/emacs-modes/weave.ch b/support/emacs-modes/weave.ch new file mode 100644 index 0000000000..3fd8f533c7 --- /dev/null +++ b/support/emacs-modes/weave.ch @@ -0,0 +1,626 @@ +% Change file for the WEAVE processor, for use on Berkeley UNIX systems. +% This file was created by Howard Trickey and Pavel Curtis. + +% History: +% 11/29/82 HWT Original version. This modifies weave to allow a new +% control sequence: +% @=...text...@> Put ...text... verbatim on a line +% by itself in the Pascal output. +% (argument must fit on one line) +% This control sequence facilitates putting #include "gcons.h" +% (for example) in files meant for the pc compiler. +% Also, there is a command line option, -c, which means that +% only the modules affected by the change file are to generate +% TeX output. (All the limbo stuff still goes to the output +% file, as does the index and table of contents.) +% +% 2/12/83 HWT Brought up for use with version 1.3. Uses Knuth's new +% control sequences for verbatim Pascal (as above, without +% the "on one line" part), and the force_line (@\) primitive. +% Also, he added stuff to keep track of changed modules, and +% output enough information that macros can choose only to +% print changed modules. This isn't as efficient as my +% implementation because I avoided outputting the text for +% non-changed modules altogether, but this feature won't be +% used too often (just for TeX and TeXware), so Knuth's +% solution is accepted. +% The change file changes that used +% to implement these features have been removed. +% There is a -x flag to cause WEAVE to omit cross referencing +% of identifiers, and index and T.of.C. processing. +% This, too, is unnecessary, for one could simply redefine some +% WEB macros to avoid the printing, but there are only a couple +% of easy changes, so they have been made. +% +% 2/18 HWT Increased stack size to 400 (not for TeX-related programs). +% +% 3/18 HWT Brought up for Version 1.5. Made it print newline at end of +% run. +% +% 4/13 PC Merged with Pavel's version, including adding a call to +% exit() at the end of the program, based upon the value of +% `history'. +% 4/16 PC Brought up to version 1.5 released with TeX 0.97 in April 1983 +% 6/29 HWT Brought up to version 1.7 released with TeX 0.99 in June 1983, +% introducing a new change file format +% 7/17 HWT Brought up to version 2.0 released with TeX 0.999 in July 1983 +% 7/29 HWT Brought up to version 2.1 +% 11/17 HWT Brought up to version 2.4 released with TeX 1.0. Made +% changes to use C routines for I/O, for speedup. +% 1/31 HWT Brought up to version 2.6 +% 12/28/85 PAM Brought up to version 2.8 (like 2.7, version number only) +% 3/6/87 PAM Brought up to version 2.9 (like 2.8, version number only) +% 8/10/89 don Brought up to version 3.1, with `otherwise' fixed too +% 8/31/89 don Brought up to version 4, with all possible characters enabled +% 10/16/89 don fixed bug when ".web" and ".ch" are explicitly stated + +% NOTE: The module numbers refer to the standard WEB manual (CS 980). + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [0] WEAVE: print changes only +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +\pageno=\contentspagenumber \advance\pageno by 1 +@y +\pageno=\contentspagenumber \advance\pageno by 1 +\let\maybe=\iffalse +\def\title{WEAVE changes for Berkeley {\mc UNIX}} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [1] Change banner message +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d banner=='This is WEAVE, Version 4' +@y +@d banner=='This is WEAVE, Version 4 for SunOS' +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [2] add input and output, remove other files, add ref to scan_args, +% [2] and #include external definition for exit(), etc. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +program WEAVE(@!web_file,@!change_file,@!tex_file); +label end_of_WEAVE; {go here to finish} +const @<Constants in the outer block@>@/ +type @<Types in the outer block@>@/ +var @<Globals in the outer block@>@/ +@<Error handling procedures@>@/ +@y +program WEAVE(@!input,@!output); +label end_of_WEAVE; {go here to finish} +const @<Constants in the outer block@>@/ +type @<Types in the outer block@>@/ +var @<Globals in the outer block@>@/ +@\ +@=#include "tangext.h"@> +@\@/ +@<Error handling procedures@>@/ +@<|scan_args| procedure@>@/ +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [3] Show statistics +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d stat==@{ {change this to `$\\{stat}\equiv\null$' + when gathering usage statistics} +@d tats==@t@>@} {change this to `$\\{tats}\equiv\null$' + when gathering usage statistics} +@y +@d stat== {I'm gathering usage statistics} +@d tats== {because I have to know how close \TeX\ comes to the limits} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [4] compiler options +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@{@&$C-,A+,D-@} {no range check, catch arithmetic overflow, no debug overhead} +@!debug @{@&$C+,D+@}@+ gubed {but turn everything on when debugging} +@y +@=(*$C-*)@> {no range check} +@!debug @=(*$C+*)@>@+ gubed {but turn everything on when debugging} +@\ +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [7] Fix others: +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d othercases == others: {default for cases not listed explicitly} +@y +@d othercases == otherwise {SunOS Pascal default cases} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [8] Constants: Make stack_size=400 instead of 200 +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@!stack_size=200; {number of simultaneous output levels} +@y +@!stack_size=400; {number of simultaneous output levels} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [17] enable maximum character set +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +for i:=1 to @'37 do xchr[i]:=' '; +for i:=@'200 to @'377 do xchr[i]:=' '; +@y +for i:=1 to @'37 do xchr[i]:=chr(i); +for i:=@'200 to @'377 do xchr[i]:=chr(i); +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [20] terminal output: use standard i/o +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d print(#)==write(term_out,#) {`|print|' means write on the terminal} +@y +@d term_out==output +@d print(#)==write(term_out,#) {`|print|' means write on the terminal} +@z + +@x +@<Globals...@>= +@!term_out:text_file; {the terminal as an output file} +@y + +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [21] init terminal +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@ Different systems have different ways of specifying that the output on a +certain file will appear on the user's terminal. Here is one way to do this +on the \PASCAL\ system that was used in \.{TANGLE}'s initial development: +@^system dependencies@> + +@<Set init...@>= +rewrite(term_out,'TTY:'); {send |term_out| output to the terminal} +@y +@ Different systems have different ways of specifying that the output on a +certain file will appear on the user's terminal. +@^system dependencies@> + +@<Set init...@>= +; {nothing need be done} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [22] flush terminal buffer +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d update_terminal == break(term_out) {empty the terminal output buffer} +@y +@d update_terminal == flush(term_out) {empty the terminal output buffer} +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [24] open input files +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@ The following code opens the input files. Since these files were listed +in the program header, we assume that the \PASCAL\ runtime system has +already checked that suitable file names have been given; therefore no +additional error checking needs to be done. We will see below that +\.{WEAVE} reads through the entire input twice. +@^system dependencies@> + +@p procedure open_input; {prepare to read |web_file| and |change_file|} +begin reset(web_file); reset(change_file); +end; +@y +@ The following code opens the input files. +This is called after |scan_args| has filled the file name variables +appropriately. +@^system dependencies@> + +@p procedure open_input; {prepare to read |web_file| and |change_file|} +begin reset(web_file,web_name); + reset(change_file,change_name); +end; +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [26] opening tex file +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@ The following code opens |tex_file|. +Since this file was listed in the program header, we assume that the +\PASCAL\ runtime system has checked that a suitable external file name has +been given. +@^system dependencies@> + +@<Set init...@>= +rewrite(tex_file); +@y +@ The following code opens |tex_file|. +The |scan_args| procedure is used to set up |tex_name| as required. +@^system dependencies@> + +@<Set init...@>= +scan_args; +rewrite(tex_file,tex_name); +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [28] faster input_ln +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@p function input_ln(var f:text_file):boolean; + {inputs a line or returns |false|} +var final_limit:0..buf_size; {|limit| without trailing blanks} +begin limit:=0; final_limit:=0; +if eof(f) then input_ln:=false +else begin while not eoln(f) do + begin buffer[limit]:=xord[f^]; get(f); + incr(limit); + if buffer[limit-1]<>" " then final_limit:=limit; + if limit=buf_size then + begin while not eoln(f) do get(f); + decr(limit); {keep |buffer[buf_size]| empty} + if final_limit>limit then final_limit:=limit; + print_nl('! Input line too long'); loc:=0; error; +@.Input line too long@> + end; + end; + read_ln(f); limit:=final_limit; input_ln:=true; + end; +end; +@y +With Berkeley {\mc UNIX} we call an external C procedure, |line_read|. +That routine fills |buffer| from 0 onwards with the |xord|'ed values +of the next line, setting |limit| appropriately (ignoring trailing +blanks). +It will stop if |limit=buf_size|, and the following will cause an error +message. +Note: for bootstrapping purposes it is all right to use the original form +of |input_ln|; it will just run slower. + +@p function input_ln(var f:text_file):boolean; + {inputs a line or returns |false|} +begin limit:=0; +if test_eof(f) then input_ln:=false +else begin line_read(f); + if limit=buf_size then + begin + decr(limit); {keep |buffer[buf_size]| empty} + print_nl('! Input line too long'); loc:=0; error; +@.Input line too long@> + end; + input_ln:=true; + end; +end; +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [50] don't enter xrefs if no_xref set +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@d append_xref(#)==if xref_ptr=max_refs then overflow('cross reference') + else begin incr(xref_ptr); num(xref_ptr):=#; + end + +@p procedure new_xref(@!p:name_pointer); +label exit; +var q:xref_number; {pointer to previous cross reference} +@!m,@!n: sixteen_bits; {new and previous cross-reference value} +begin if (reserved(p)or(byte_start[p]+1=byte_start[p+ww]))and +@y +If the user has sent the |no_xref| flag (the -x option of the command line), +then it is unnecessary to keep track of cross references for identifers. +If one were careful, one could probably make more changes around module +100 to avoid a lot of identifier looking up. + +@d append_xref(#)==if xref_ptr=max_refs then overflow('cross reference') + else begin incr(xref_ptr); num(xref_ptr):=#; + end + +@p procedure new_xref(@!p:name_pointer); +label exit; +var q:xref_number; {pointer to previous cross-reference} +@!m,@!n: sixteen_bits; {new and previous cross-reference value} +begin if no_xref then return; +if (reserved(p)or(byte_start[p]+1=byte_start[p+ww]))and +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [122] faster flush_buffer +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +done: for k:=1 to j do write(tex_file,xchr[out_buf[k]]); +@y +done: linewrite(tex_file,j); +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [239] omit index and module names if no_xref set +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@* Phase three processing. +We are nearly finished! \.{WEAVE}'s only remaining task is to write out the +index, after sorting the identifiers and index entries. + +@<Phase III: Output the cross-reference index@>= +phase_three:=true; print_nl('Writing the index...'); +if change_exists then + begin finish_line; @<Tell about changed modules@>; + end; +finish_line; out4("\")("i")("n")("x"); finish_line; +@.\\inx@> +@<Do the first pass of sorting@>; +@<Sort and output the index@>; +out4("\")("f")("i")("n"); finish_line; +@.\\fin@> +@<Output all the module names@>; +out4("\")("c")("o")("n"); finish_line; +@.\\con@> +print('Done.'); +@y +@* Phase three processing. +We are nearly finished! \.{WEAVE}'s only remaining task is to write out the +index, after sorting the identifiers and index entries. + +If the user has set the |no_xref| flag (the -x option on the command line), +just finish off the page, omitting the index, module name list, and table of +contents. + +@<Phase III: Output the cross-reference index@>= +if no_xref then begin + finish_line; + out("\"); out5("v")("f")("i")("l")("l"); + out4("\")("e")("n")("d"); + finish_line; + end +else begin +phase_three:=true; print_nl('Writing the index...'); +finish_line; +out("\"); out5("i")("n")("p")("u")("t"); out(" "); +out5("I")("N")("D")("E")("X"); +finish_line; +out("\"); out5("i")("n")("p")("u")("t"); out5(" ")("M")("O")("D")("U"); +out5("L")("E")("_")("N")("A"); out3("M")("E")("S"); +finish_line; +rewrite(tex_file,'INDEX.tex'); +if change_exists then + begin @<Tell about changed modules@>; + end; +finish_line; finish_line; out4("\")("i")("n")("x"); finish_line; +@.\\inx@> +@<Do the first pass of sorting@>; +@<Sort and output the index@>; +out4("\")("f")("i")("n"); finish_line; +@.\\fin@> +rewrite(tex_file,'MODULE_NAMES.tex'); +@<Output all the module names@>; +out4("\")("c")("o")("n"); finish_line; +@.\\con@> +print('Done.'); +end; +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [258] term_in == input, when debugging +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +any error stop will set |debug_cycle| to zero. +@y +any error stop will set |debug_cycle| to zero. + +@d term_in==input +@z + +@x +@!term_in:text_file; {the user's terminal as an input file} +@y + +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [259] Take out reset(term_in) +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +reset(term_in,'TTY:','/I'); {open |term_in| as the terminal, don't do a |get|} +@y + +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [261] print newline at end of run and exit based upon value of history +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@p procedure Phase_I; +@y +@d UNIXexit==e@&x@&i@&t + +@p procedure Phase_I; +@z + +@x +end. +@y +new_line; +if (history <> spotless) and (history <> harmless_message) then + UNIXexit(1) +else + UNIXexit(0); +end. +@z + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% [264] system dependent changes--the scan_args procedure +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@x +@* System-dependent changes. +This module should be replaced, if necessary, by changes to the program +that are necessary to make \.{WEAVE} work at a particular installation. +It is usually best to design your change file so that all changes to +previous modules preserve the module numbering; then everybody's version +will be consistent with the printed program. More extensive changes, +which introduce new modules, can be inserted here; then only the index +itself will get a new module number. +@^system dependencies@> +@y +@* System-dependent changes. +The user calls \.{WEAVE} with arguments on the command line. +These are either file names or flags (beginning with '-'). +The following globals are for communicating the user's desires to the rest +of the program. The various |file_name| variables contain strings with +the full names of those files, as UNIX knows them. + +The only flag that affects weave is |'-x'| whose status is kept in |no_xref|. + +@d max_file_name_length==60 + +@<Globals...@>= +@!web_name,@!change_name,@!tex_name: + array[1..max_file_name_length] of char; +@!no_xref:boolean; + +@ The |scan_args| procedure looks at the command line arguments and sets +the |file_name| variables accordingly. +At least one file name must be present: the \.{WEB} file. It may have +an extension, or it may omit it to get |'.web'| added. +The \TeX\ output file name is formed by replacing the \.{WEB} file +name extension by |'.tex'|. + +If there is another file name present among the arguments, it is the +change file, again either with an extension or without one to get |'.ch'| +An omitted change file argument means that |'/dev/null'| should be used, +when no changes are desired. + +An argument beginning with a minus sign is a flag. +Any letters following the minus sign may cause global flag variables to be +set. +Currently, an |x| means that the cross referencing information---the index, +the module name list, and the table of contents---is to be suppressed. + +@<|scan_args|...@>= +procedure scan_args; +var dot_pos,i,a: integer; {indices} +@!fname: array[1..max_file_name_length-5] of char; {temporary argument holder} +@!found_web,@!found_change: boolean; {|true| when those file names have + been seen} +begin +found_web:=false; +found_change:=false; +no_xref:=false; +for a:=1 to argc-1 do begin + argv(a,fname); {put argument number |a| into |fname|} + if fname[1]<>'-' then begin + if not found_web then + @<Get |web_name|, |pascal_name|, and + | pool_name| variables from |fname|@> + else if not found_change then + @<Get |change_name| from |fname|@> + else @<Print usage error message and quit@>; + end + else @<Handle flag argument in |fname|@>; + end; +if not found_web then @<Print usage error message and quit@>; +if not found_change then @<Set up null change file@>; +end; + +@ Use all of |fname| for the |web_name| if there is a |'.'| in it, +otherwise add |'.web'|. +The other file names come from adding things after the dot. +The |argv| procedure will not put more than |max_file_name_length-5| +characters into |fname|, and this leaves enough room in the |file_name| +variables to add the extensions. + +The end of a file name is marked with a |' '|, the convention assumed by +the |reset| and |rewrite| procedures. + +@<Get |web_name|...@>= +begin +dot_pos:=-1; +i:=1; +while (fname[i]<>' ') and (i<=max_file_name_length-5) do begin + web_name[i]:=fname[i]; + if fname[i]='.' then dot_pos:=i; + incr(i); + end; +if dot_pos=-1 then begin + dot_pos:=i; + web_name[dot_pos]:='.'; + web_name[dot_pos+1]:='w'; + web_name[dot_pos+2]:='e'; + web_name[dot_pos+3]:='b'; + web_name[dot_pos+4]:=' '; + end +else web_name[i]:=' '; +for i:=1 to dot_pos do begin + tex_name[i]:=web_name[i]; + end; +tex_name[dot_pos+1]:='t'; +tex_name[dot_pos+2]:='e'; +tex_name[dot_pos+3]:='x'; +tex_name[dot_pos+4]:=' '; +found_web:=true; +end + +@ + +@<Get |change_name|...@>= +begin +dot_pos:=-1; +i:=1; +while (fname[i]<>' ') and (i<=max_file_name_length-5) +do begin + change_name[i]:=fname[i]; + if fname[i]='.' then dot_pos:=i; + incr(i); + end; +if dot_pos=-1 then begin + dot_pos:=i; + change_name[dot_pos]:='.'; + change_name[dot_pos+1]:='c'; + change_name[dot_pos+2]:='h'; + change_name[dot_pos+3]:=' '; + end +else change_name[i]:=' '; +found_change:=true; +end + +@ + +@<Set up null...@>= +begin + change_name[1]:='/'; + change_name[2]:='d'; + change_name[3]:='e'; + change_name[4]:='v'; + change_name[5]:='/'; + change_name[6]:='n'; + change_name[7]:='u'; + change_name[8]:='l'; + change_name[9]:='l'; + change_name[10]:=' '; +end + +@ + +@<Handle flag...@>= +begin +i:=2; +while (fname[i]<>' ') and (i<=max_file_name_length-5) do begin + if fname[i]='x' then no_xref:=true; + incr(i); + end; +end + +@ + +@<Print usage error message and quit@>= +begin +print_nl('! Usage: weave webfile[.web] [changefile[.ch]] [-x]'); +error; +jump_out; +end + +@z |