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jeremybenn |
#! /usr/bin/perl -w
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# Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
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# This file is part of GCC.
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# GCC is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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# GCC is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GCC; see the file COPYING. If not, write to
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# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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# Boston MA 02110-1301, USA.
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# This does trivial (and I mean _trivial_) conversion of Texinfo
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# markup to Perl POD format. It's intended to be used to extract
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# something suitable for a manpage from a Texinfo document.
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$output = 0;
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$skipping = 0;
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%sects = ();
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$section = "";
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@icstack = ();
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@endwstack = ();
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@skstack = ();
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@instack = ();
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$shift = "";
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%defs = ();
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$fnno = 1;
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$inf = "";
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$ibase = "";
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@ipath = ();
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while ($_ = shift) {
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if (/^-D(.*)$/) {
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if ($1 ne "") {
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$flag = $1;
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} else {
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$flag = shift;
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}
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$value = "";
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($flag, $value) = ($flag =~ /^([^=]+)(?:=(.+))?/);
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die "no flag specified for -D\n"
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unless $flag ne "";
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die "flags may only contain letters, digits, hyphens, dashes and underscores\n"
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unless $flag =~ /^[a-zA-Z0-9_-]+$/;
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$defs{$flag} = $value;
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} elsif (/^-I(.*)$/) {
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if ($1 ne "") {
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$flag = $1;
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} else {
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$flag = shift;
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}
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push (@ipath, $flag);
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} elsif (/^-/) {
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usage();
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} else {
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$in = $_, next unless defined $in;
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$out = $_, next unless defined $out;
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usage();
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}
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}
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if (defined $in) {
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$inf = gensym();
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open($inf, "<$in") or die "opening \"$in\": $!\n";
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$ibase = $1 if $in =~ m|^(.+)/[^/]+$|;
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} else {
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$inf = \*STDIN;
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}
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if (defined $out) {
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open(STDOUT, ">$out") or die "opening \"$out\": $!\n";
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}
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while(defined $inf) {
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while(<$inf>) {
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# Certain commands are discarded without further processing.
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/^\@(?:
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[a-z]+index # @*index: useful only in complete manual
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|need # @need: useful only in printed manual
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|(?:end\s+)?group # @group .. @end group: ditto
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|page # @page: ditto
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|node # @node: useful only in .info file
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|(?:end\s+)?ifnottex # @ifnottex .. @end ifnottex: use contents
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)\b/x and next;
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chomp;
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# Look for filename and title markers.
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/^\@setfilename\s+([^.]+)/ and $fn = $1, next;
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/^\@settitle\s+([^.]+)/ and $tl = postprocess($1), next;
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# Identify a man title but keep only the one we are interested in.
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/^\@c\s+man\s+title\s+([A-Za-z0-9-]+)\s+(.+)/ and do {
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if (exists $defs{$1}) {
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$fn = $1;
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$tl = postprocess($2);
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}
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next;
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};
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# Look for blocks surrounded by @c man begin SECTION ... @c man end.
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# This really oughta be @ifman ... @end ifman and the like, but such
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# would require rev'ing all other Texinfo translators.
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/^\@c\s+man\s+begin\s+([A-Z]+)\s+([A-Za-z0-9-]+)/ and do {
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$output = 1 if exists $defs{$2};
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$sect = $1;
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next;
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};
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/^\@c\s+man\s+begin\s+([A-Z]+)/ and $sect = $1, $output = 1, next;
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/^\@c\s+man\s+end/ and do {
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$sects{$sect} = "" unless exists $sects{$sect};
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$sects{$sect} .= postprocess($section);
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$section = "";
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$output = 0;
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next;
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};
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# handle variables
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/^\@set\s+([a-zA-Z0-9_-]+)\s*(.*)$/ and do {
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$defs{$1} = $2;
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next;
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};
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/^\@clear\s+([a-zA-Z0-9_-]+)/ and do {
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delete $defs{$1};
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next;
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};
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next unless $output;
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# Discard comments. (Can't do it above, because then we'd never see
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# @c man lines.)
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/^\@c\b/ and next;
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# End-block handler goes up here because it needs to operate even
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# if we are skipping.
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/^\@end\s+([a-z]+)/ and do {
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# Ignore @end foo, where foo is not an operation which may
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# cause us to skip, if we are presently skipping.
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my $ended = $1;
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next if $skipping && $ended !~ /^(?:ifset|ifclear|ignore|menu|iftex|copying)$/;
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die "\@end $ended without \@$ended at line $.\n" unless defined $endw;
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die "\@$endw ended by \@end $ended at line $.\n" unless $ended eq $endw;
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$endw = pop @endwstack;
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if ($ended =~ /^(?:ifset|ifclear|ignore|menu|iftex)$/) {
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$skipping = pop @skstack;
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next;
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} elsif ($ended =~ /^(?:example|smallexample|display)$/) {
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$shift = "";
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$_ = ""; # need a paragraph break
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} elsif ($ended =~ /^(?:itemize|enumerate|[fv]?table)$/) {
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$_ = "\n=back\n";
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$ic = pop @icstack;
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} elsif ($ended eq "multitable") {
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$_ = "\n=back\n";
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} else {
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die "unknown command \@end $ended at line $.\n";
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}
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};
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# We must handle commands which can cause skipping even while we
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# are skipping, otherwise we will not process nested conditionals
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# correctly.
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/^\@ifset\s+([a-zA-Z0-9_-]+)/ and do {
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push @endwstack, $endw;
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push @skstack, $skipping;
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$endw = "ifset";
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$skipping = 1 unless exists $defs{$1};
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next;
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};
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/^\@ifclear\s+([a-zA-Z0-9_-]+)/ and do {
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push @endwstack, $endw;
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push @skstack, $skipping;
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$endw = "ifclear";
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$skipping = 1 if exists $defs{$1};
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next;
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};
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/^\@(ignore|menu|iftex|copying)\b/ and do {
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push @endwstack, $endw;
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push @skstack, $skipping;
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$endw = $1;
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$skipping = 1;
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next;
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};
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next if $skipping;
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# Character entities. First the ones that can be replaced by raw text
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# or discarded outright:
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s/\@copyright\{\}/(c)/g;
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s/\@dots\{\}/.../g;
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s/\@enddots\{\}/..../g;
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s/\@([.!? ])/$1/g;
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s/\@[:-]//g;
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s/\@bullet(?:\{\})?/*/g;
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s/\@TeX\{\}/TeX/g;
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s/\@pounds\{\}/\#/g;
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s/\@minus(?:\{\})?/-/g;
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s/\\,/,/g;
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# Now the ones that have to be replaced by special escapes
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# (which will be turned back into text by unmunge())
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s/&/&/g;
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s/\@\{/{/g;
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s/\@\}/}/g;
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s/\@\@/&at;/g;
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# Inside a verbatim block, handle @var, @samp and @url specially.
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if ($shift ne "") {
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s/\@var\{([^\}]*)\}/<$1>/g;
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s/\@samp\{([^\}]*)\}/"$1"/g;
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s/\@url\{([^\}]*)\}/<$1>/g;
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}
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# POD doesn't interpret E<> inside a verbatim block.
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if ($shift eq "") {
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s/</</g;
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s/>/>/g;
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} else {
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s/</</g;
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s/>/>/g;
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| 235 |
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}
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| 236 |
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| 237 |
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# Single line command handlers.
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| 238 |
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| 239 |
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/^\@include\s+(.+)$/ and do {
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| 240 |
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push @instack, $inf;
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| 241 |
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$inf = gensym();
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| 242 |
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$file = postprocess($1);
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| 243 |
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| 244 |
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# Try cwd and $ibase, then explicit -I paths.
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| 245 |
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$done = 0;
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foreach $path ("", $ibase, @ipath) {
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| 247 |
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$mypath = $file;
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| 248 |
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$mypath = $path . "/" . $mypath if ($path ne "");
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| 249 |
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open($inf, "<" . $mypath) and ($done = 1, last);
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| 250 |
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}
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| 251 |
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die "cannot find $file" if !$done;
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| 252 |
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next;
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| 253 |
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};
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| 254 |
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| 255 |
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/^\@(?:section|unnumbered|unnumberedsec|center|heading)\s+(.+)$/
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| 256 |
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and $_ = "\n=head2 $1\n";
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| 257 |
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/^\@subsection\s+(.+)$/
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| 258 |
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and $_ = "\n=head3 $1\n";
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| 259 |
|
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/^\@subsubsection\s+(.+)$/
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| 260 |
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and $_ = "\n=head4 $1\n";
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| 261 |
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| 262 |
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# Block command handlers:
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| 263 |
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/^\@itemize(?:\s+(\@[a-z]+|\*|-))?/ and do {
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| 264 |
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push @endwstack, $endw;
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| 265 |
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push @icstack, $ic;
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| 266 |
|
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if (defined $1) {
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| 267 |
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$ic = $1;
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| 268 |
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} else {
|
| 269 |
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$ic = '*';
|
| 270 |
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}
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| 271 |
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$_ = "\n=over 4\n";
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| 272 |
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$endw = "itemize";
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| 273 |
|
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};
|
| 274 |
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|
| 275 |
|
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/^\@enumerate(?:\s+([a-zA-Z0-9]+))?/ and do {
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| 276 |
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push @endwstack, $endw;
|
| 277 |
|
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push @icstack, $ic;
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| 278 |
|
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if (defined $1) {
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| 279 |
|
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$ic = $1 . ".";
|
| 280 |
|
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} else {
|
| 281 |
|
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$ic = "1.";
|
| 282 |
|
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}
|
| 283 |
|
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$_ = "\n=over 4\n";
|
| 284 |
|
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$endw = "enumerate";
|
| 285 |
|
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};
|
| 286 |
|
|
|
| 287 |
|
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/^\@multitable\s.*/ and do {
|
| 288 |
|
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push @endwstack, $endw;
|
| 289 |
|
|
$endw = "multitable";
|
| 290 |
|
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$_ = "\n=over 4\n";
|
| 291 |
|
|
};
|
| 292 |
|
|
|
| 293 |
|
|
/^\@([fv]?table)\s+(\@[a-z]+)/ and do {
|
| 294 |
|
|
push @endwstack, $endw;
|
| 295 |
|
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push @icstack, $ic;
|
| 296 |
|
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$endw = $1;
|
| 297 |
|
|
$ic = $2;
|
| 298 |
|
|
$ic =~ s/\@(?:samp|strong|key|gcctabopt|env)/B/;
|
| 299 |
|
|
$ic =~ s/\@(?:code|kbd)/C/;
|
| 300 |
|
|
$ic =~ s/\@(?:dfn|var|emph|cite|i)/I/;
|
| 301 |
|
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$ic =~ s/\@(?:file)/F/;
|
| 302 |
|
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$ic =~ s/\@(?:asis)//;
|
| 303 |
|
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$_ = "\n=over 4\n";
|
| 304 |
|
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};
|
| 305 |
|
|
|
| 306 |
|
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/^\@((?:small)?example|display)/ and do {
|
| 307 |
|
|
push @endwstack, $endw;
|
| 308 |
|
|
$endw = $1;
|
| 309 |
|
|
$shift = "\t";
|
| 310 |
|
|
$_ = ""; # need a paragraph break
|
| 311 |
|
|
};
|
| 312 |
|
|
|
| 313 |
|
|
/^\@item\s+(.*\S)\s*$/ and $endw eq "multitable" and do {
|
| 314 |
|
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@columns = ();
|
| 315 |
|
|
for $column (split (/\s*\@tab\s*/, $1)) {
|
| 316 |
|
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# @strong{...} is used a @headitem work-alike
|
| 317 |
|
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$column =~ s/^\@strong{(.*)}$/$1/;
|
| 318 |
|
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push @columns, $column;
|
| 319 |
|
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}
|
| 320 |
|
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$_ = "\n=item ".join (" : ", @columns)."\n";
|
| 321 |
|
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};
|
| 322 |
|
|
|
| 323 |
|
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/^\@itemx?\s*(.+)?$/ and do {
|
| 324 |
|
|
if (defined $1) {
|
| 325 |
|
|
if ($ic) {
|
| 326 |
|
|
if ($endw eq "enumerate") {
|
| 327 |
|
|
$_ = "\n=item $ic $1\n";
|
| 328 |
|
|
$ic =~ s/(\d+)/$1 + 1/eg;
|
| 329 |
|
|
} else {
|
| 330 |
|
|
# Entity escapes prevent munging by the <>
|
| 331 |
|
|
# processing below.
|
| 332 |
|
|
$_ = "\n=item $ic\<$1\>\n";
|
| 333 |
|
|
}
|
| 334 |
|
|
} else {
|
| 335 |
|
|
$_ = "\n=item $1\n";
|
| 336 |
|
|
}
|
| 337 |
|
|
} else {
|
| 338 |
|
|
$_ = "\n=item $ic\n";
|
| 339 |
|
|
$ic =~ y/A-Ya-y/B-Zb-z/;
|
| 340 |
|
|
$ic =~ s/(\d+)/$1 + 1/eg;
|
| 341 |
|
|
}
|
| 342 |
|
|
};
|
| 343 |
|
|
|
| 344 |
|
|
$section .= $shift.$_."\n";
|
| 345 |
|
|
}
|
| 346 |
|
|
# End of current file.
|
| 347 |
|
|
close($inf);
|
| 348 |
|
|
$inf = pop @instack;
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
die "No filename or title\n" unless defined $fn && defined $tl;
|
| 352 |
|
|
|
| 353 |
|
|
$sects{NAME} = "$fn \- $tl\n";
|
| 354 |
|
|
$sects{FOOTNOTES} .= "=back\n" if exists $sects{FOOTNOTES};
|
| 355 |
|
|
|
| 356 |
|
|
for $sect (qw(NAME SYNOPSIS DESCRIPTION OPTIONS ENVIRONMENT FILES
|
| 357 |
|
|
BUGS NOTES FOOTNOTES SEEALSO AUTHOR COPYRIGHT)) {
|
| 358 |
|
|
if(exists $sects{$sect}) {
|
| 359 |
|
|
$head = $sect;
|
| 360 |
|
|
$head =~ s/SEEALSO/SEE ALSO/;
|
| 361 |
|
|
print "=head1 $head\n\n";
|
| 362 |
|
|
print scalar unmunge ($sects{$sect});
|
| 363 |
|
|
print "\n";
|
| 364 |
|
|
}
|
| 365 |
|
|
}
|
| 366 |
|
|
|
| 367 |
|
|
sub usage
|
| 368 |
|
|
{
|
| 369 |
|
|
die "usage: $0 [-D toggle...] [infile [outfile]]\n";
|
| 370 |
|
|
}
|
| 371 |
|
|
|
| 372 |
|
|
sub postprocess
|
| 373 |
|
|
{
|
| 374 |
|
|
local $_ = $_[0];
|
| 375 |
|
|
|
| 376 |
|
|
# @value{foo} is replaced by whatever 'foo' is defined as.
|
| 377 |
|
|
while (m/(\@value\{([a-zA-Z0-9_-]+)\})/g) {
|
| 378 |
|
|
if (! exists $defs{$2}) {
|
| 379 |
|
|
print STDERR "Option $2 not defined\n";
|
| 380 |
|
|
s/\Q$1\E//;
|
| 381 |
|
|
} else {
|
| 382 |
|
|
$value = $defs{$2};
|
| 383 |
|
|
s/\Q$1\E/$value/;
|
| 384 |
|
|
}
|
| 385 |
|
|
}
|
| 386 |
|
|
|
| 387 |
|
|
# Formatting commands.
|
| 388 |
|
|
# Temporary escape for @r.
|
| 389 |
|
|
s/\@r\{([^\}]*)\}/R<$1>/g;
|
| 390 |
|
|
s/\@(?:dfn|var|emph|cite|i)\{([^\}]*)\}/I<$1>/g;
|
| 391 |
|
|
s/\@(?:code|kbd)\{([^\}]*)\}/C<$1>/g;
|
| 392 |
|
|
s/\@(?:samp|strong|key|option|env|command|b)\{([^\}]*)\}/B<$1>/g;
|
| 393 |
|
|
s/\@sc\{([^\}]*)\}/\U$1/g;
|
| 394 |
|
|
s/\@file\{([^\}]*)\}/F<$1>/g;
|
| 395 |
|
|
s/\@w\{([^\}]*)\}/S<$1>/g;
|
| 396 |
|
|
s/\@(?:dmn|math)\{([^\}]*)\}/$1/g;
|
| 397 |
|
|
|
| 398 |
|
|
# keep references of the form @ref{...}, print them bold
|
| 399 |
|
|
s/\@(?:ref)\{([^\}]*)\}/B<$1>/g;
|
| 400 |
|
|
|
| 401 |
|
|
# Change double single quotes to double quotes.
|
| 402 |
|
|
s/''/"/g;
|
| 403 |
|
|
s/``/"/g;
|
| 404 |
|
|
|
| 405 |
|
|
# Cross references are thrown away, as are @noindent and @refill.
|
| 406 |
|
|
# (@noindent is impossible in .pod, and @refill is unnecessary.)
|
| 407 |
|
|
# @* is also impossible in .pod; we discard it and any newline that
|
| 408 |
|
|
# follows it. Similarly, our macro @gol must be discarded.
|
| 409 |
|
|
|
| 410 |
|
|
s/\(?\@xref\{(?:[^\}]*)\}(?:[^.<]|(?:<[^<>]*>))*\.\)?//g;
|
| 411 |
|
|
s/\s+\(\@pxref\{(?:[^\}]*)\}\)//g;
|
| 412 |
|
|
s/;\s+\@pxref\{(?:[^\}]*)\}//g;
|
| 413 |
|
|
s/\@noindent\s*//g;
|
| 414 |
|
|
s/\@refill//g;
|
| 415 |
|
|
s/\@gol//g;
|
| 416 |
|
|
s/\@\*\s*\n?//g;
|
| 417 |
|
|
|
| 418 |
|
|
# Anchors are thrown away
|
| 419 |
|
|
s/\@anchor\{(?:[^\}]*)\}//g;
|
| 420 |
|
|
|
| 421 |
|
|
# @uref can take one, two, or three arguments, with different
|
| 422 |
|
|
# semantics each time. @url and @email are just like @uref with
|
| 423 |
|
|
# one argument, for our purposes.
|
| 424 |
|
|
s/\@(?:uref|url|email)\{([^\},]*)\}/<B<$1>>/g;
|
| 425 |
|
|
s/\@uref\{([^\},]*),([^\},]*)\}/$2 (C<$1>)/g;
|
| 426 |
|
|
s/\@uref\{([^\},]*),([^\},]*),([^\},]*)\}/$3/g;
|
| 427 |
|
|
|
| 428 |
|
|
# Handle gccoptlist here, so it can contain the above formatting
|
| 429 |
|
|
# commands.
|
| 430 |
|
|
s/\@gccoptlist\{([^\}]*)\}/B<$1>/g;
|
| 431 |
|
|
|
| 432 |
|
|
# Un-escape <> at this point.
|
| 433 |
|
|
s/</</g;
|
| 434 |
|
|
s/>/>/g;
|
| 435 |
|
|
|
| 436 |
|
|
# Now un-nest all B<>, I<>, R<>. Theoretically we could have
|
| 437 |
|
|
# indefinitely deep nesting; in practice, one level suffices.
|
| 438 |
|
|
1 while s/([BIR])<([^<>]*)([BIR])<([^<>]*)>/$1<$2>$3<$4>$1</g;
|
| 439 |
|
|
|
| 440 |
|
|
# Replace R<...> with bare ...; eliminate empty markup, B<>;
|
| 441 |
|
|
# shift white space at the ends of [BI]<...> expressions outside
|
| 442 |
|
|
# the expression.
|
| 443 |
|
|
s/R<([^<>]*)>/$1/g;
|
| 444 |
|
|
s/[BI]<>//g;
|
| 445 |
|
|
s/([BI])<(\s+)([^>]+)>/$2$1<$3>/g;
|
| 446 |
|
|
s/([BI])<([^>]+?)(\s+)>/$1<$2>$3/g;
|
| 447 |
|
|
|
| 448 |
|
|
# Extract footnotes. This has to be done after all other
|
| 449 |
|
|
# processing because otherwise the regexp will choke on formatting
|
| 450 |
|
|
# inside @footnote.
|
| 451 |
|
|
while (/\@footnote/g) {
|
| 452 |
|
|
s/\@footnote\{([^\}]+)\}/[$fnno]/;
|
| 453 |
|
|
add_footnote($1, $fnno);
|
| 454 |
|
|
$fnno++;
|
| 455 |
|
|
}
|
| 456 |
|
|
|
| 457 |
|
|
return $_;
|
| 458 |
|
|
}
|
| 459 |
|
|
|
| 460 |
|
|
sub unmunge
|
| 461 |
|
|
{
|
| 462 |
|
|
# Replace escaped symbols with their equivalents.
|
| 463 |
|
|
local $_ = $_[0];
|
| 464 |
|
|
|
| 465 |
|
|
s/</E<lt>/g;
|
| 466 |
|
|
s/>/E<gt>/g;
|
| 467 |
|
|
s/{/\{/g;
|
| 468 |
|
|
s/}/\}/g;
|
| 469 |
|
|
s/&at;/\@/g;
|
| 470 |
|
|
s/&/&/g;
|
| 471 |
|
|
return $_;
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
sub add_footnote
|
| 475 |
|
|
{
|
| 476 |
|
|
unless (exists $sects{FOOTNOTES}) {
|
| 477 |
|
|
$sects{FOOTNOTES} = "\n=over 4\n\n";
|
| 478 |
|
|
}
|
| 479 |
|
|
|
| 480 |
|
|
$sects{FOOTNOTES} .= "=item $fnno.\n\n"; $fnno++;
|
| 481 |
|
|
$sects{FOOTNOTES} .= $_[0];
|
| 482 |
|
|
$sects{FOOTNOTES} .= "\n\n";
|
| 483 |
|
|
}
|
| 484 |
|
|
|
| 485 |
|
|
# stolen from Symbol.pm
|
| 486 |
|
|
{
|
| 487 |
|
|
my $genseq = 0;
|
| 488 |
|
|
sub gensym
|
| 489 |
|
|
{
|
| 490 |
|
|
my $name = "GEN" . $genseq++;
|
| 491 |
|
|
my $ref = \*{$name};
|
| 492 |
|
|
delete $::{$name};
|
| 493 |
|
|
return $ref;
|
| 494 |
|
|
}
|
| 495 |
|
|
}
|
