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|
#!/usr/local/bin/perl
#
# txt2verb Copyright (C) 1993 by Norm Walsh <norm@ora.com>
# Distribute freely under the terms of the GNU Copyleft.
#
# Converts a text "screen" into a form suitable for \inputing into TeX
# and printing as a screen dump. The original form is assumed to be
# a series of 80-byte lines with any character in the range 0-255 present
# (including CR and LF in the middle of a line).
#
# The output form is a series of lines of varying length. There is
# one output line for each input line. TeX special characters and all
# characters in the ranges 0-31 and 127-255 are replaced by control
# sequences.
#
# Usage:
#
# txt2verb screenfile <texfile>
#
# If texfile is not specified, stdout is assumed.
#
# Options:
#
# -l File of lines. Input file contains lines of varying length,
# but no imbedded CR or LF chars.
# -v Verbose: print each input line as it's read.
# -q Quiet: no messages.
# -L # Set line length to '#' characters.
#
# To incorporate the resulting screen dump in your Plain TeX or LaTeX
# document, insert the following macro definitions before the first
# screen dump:
#
# \font\screenfont=cr-pc8 at 8pt % use any IBM OEM encoded fixed width font!
#
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# % These macros are derived from The TeXbook pg 380-381
# \def\uncatcodespecials{\def\do##1{\catcode`##1=12 }\dospecials}
# \def\setupverbatim{\screenfont%
# \def\par{\leavevmode\endgraf\relax}%
# \obeylines\uncatcodespecials%
# \catcode`\\=0\catcode`\{=1\catcode`\}=2\obeyspaces}
# {\obeyspaces\global\let =\ } % let active space be a control space
# \def\screenlisting#1{\par\begingroup%
# \def\c##1{\char##1}\setupverbatim\input{#1}%
# \endgroup}
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# \def\screenbox#1{%
# \vbox{\offinterlineskip%
# \parskip=0pt\parindent=0pt%
# \screenlisting{#1}}}
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# % Input converted file '#1' and set it inside a box with '#2' padding
# % space around the image.
# \def\screendump#1#2{%
# \hbox{\vrule%
# \vbox{\hrule%
# \hbox{\hskip#2%
# \vbox{\vskip#2%
# \def\twentyxs{xxxxxxxxxxxxxxxxxxxx}%
# \setbox0=\hbox{\screenfont\twentyxs\twentyxs\twentyxs\twentyxs}%
# \hbox to \wd0{\screenbox{#1}\hss}%
# \vskip#2}%
# \hskip#2}%
# \hrule}%
# \vrule\hss}}
# %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#
# To include the converted image 'screen.tex' in your document with 2pt
# of padding around the image, use:
#
# \screendump{screen}{2pt}
#
# in your document. Note: since this is set as an 'hbox', you may need
# to use \leavevmode\screendump{screen}{2pt}
#
##########################################################################
require 'getopts.pl';
do Getopts('lvqL:');
die "$0: options make no sense: -l and -L $opt_L.\n" if $opt_l && $opt_L;
$FILEOFLINES = $opt_l;
$VERBOSE = $opt_v;
$QUIET = $opt_q;
$LINELENGTH = $opt_L || 80;
$capturefile = @ARGV[0] || die "Usage: $0 capturefile <texfile>";
$texfile = @ARGV[1] || "-";
select(STDERR); $| = 1; select(STDOUT); # no buffering of stderr
%badchars = (); # These characters are illegal on input
# anything in the control character range
for ($byte = 0; $byte < 32; $byte++) {
$char = sprintf("%c", $byte);
$badchars{$char} = "\\c{$byte}";
}
# and anything over 126
for ($byte = 127; $byte < 256; $byte++) {
$char = sprintf("%c", $byte);
$badchars{$char} = "\\c{$byte}";
}
$badchars{"\%"} = '\%';
$badchars{"\$"} = '\$';
$badchars{"\&"} = '\&';
$badchars{"\#"} = '\#';
$badchars{"\{"} = '\c{123}';
$badchars{"\}"} = '\c{125}';
$badchars{"\\"} = '\c{92}';
$badchars{"\_"} = '\c{95}';
$badchars{"\^"} = '\c{94}';
open (CAPTFILE, $capturefile)
|| die "Can't open capture file: $capturefile\n";
open (TEXFILE, ">$texfile")
|| die "Can't open TeX file: $texfile\n";
while ($line = &get_line()) {
print STDERR "." if $texfile ne "-" && !$VERBOSE && !$QUIET;
print STDERR "$line\n" if $VERBOSE;
$outputbuf = "";
while (length($line) > 0) {
$char = substr($line,0,1);
$line = substr($line,1);
if (defined($badchars{$char})) {
$outputbuf .= $badchars{$char};
} else {
$outputbuf .= $char;
}
}
print TEXFILE "$outputbuf\n";
}
close(CAPTFILE);
close(TEXFILE);
exit 0;
sub get_text_line {
local($line);
if ($line = scalar(<CAPTFILE>)) {
chop($line);
}
$line;
}
sub get_data_line {
local($datalen, $line);
if ($datalen = read(CAPTFILE, $line, $LINELENGTH)) {
# if we got a complete line, look to see if the next
# characters in the file are CR, CR/LF, or LF. If so, remove
# them (assume the are line breaks in the file)
if ($datalen = $LINELENGTH) {
$place = tell(CAPTFILE);
$datalen = read(CAPTFILE, $line, 1);
if ($line eq "\015") {
$place++;
$datalen = read(CAPTFILE, $line, 1);
if ($line ne "\012") {
seek(CAPTFILE, $place, 0);
}
} elsif ($line ne "\012") {
seek(CAPTFILE, $place, 0);
}
}
} else {
return undef;
}
$line;
}
sub get_line {
local($line);
if ($FILEOFLINES) {
$line = &get_text_line();
} else {
$line = &get_data_line();
}
$line;
}
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