| #!/usr/bin/env perl |
| |
| # Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. |
| |
| # This file is part of GNU CC. |
| |
| # GNU CC is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2, or (at your option) |
| # any later version. |
| |
| # GNU CC is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| |
| # You should have received a copy of the GNU General Public License |
| # along with GNU CC; see the file COPYING. If not, write to |
| # the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
| # Boston, MA 02110-1301 USA |
| |
| # This does trivial (and I mean _trivial_) conversion of Texinfo |
| # markup to Perl POD format. It's intended to be used to extract |
| # something suitable for a manpage from a Texinfo document. |
| |
| use warnings; |
| |
| $output = 0; |
| $skipping = 0; |
| %chapters = (); |
| @chapters_sequence = (); |
| $chapter = ""; |
| @icstack = (); |
| @endwstack = (); |
| @skstack = (); |
| @instack = (); |
| $shift = ""; |
| %defs = (); |
| $fnno = 1; |
| $inf = ""; |
| @ibase = (); |
| |
| while ($_ = shift) { |
| if (/^-D(.*)$/) { |
| if ($1 ne "") { |
| $flag = $1; |
| } else { |
| $flag = shift; |
| } |
| $value = ""; |
| ($flag, $value) = ($flag =~ /^([^=]+)(?:=(.+))?/); |
| die "no flag specified for -D\n" |
| unless $flag ne ""; |
| die "flags may only contain letters, digits, hyphens, dashes and underscores\n" |
| unless $flag =~ /^[a-zA-Z0-9_-]+$/; |
| $defs{$flag} = $value; |
| } elsif (/^-I(.*)$/) { |
| push @ibase, $1 ne "" ? $1 : shift; |
| } elsif (/^-/) { |
| usage(); |
| } else { |
| $in = $_, next unless defined $in; |
| $out = $_, next unless defined $out; |
| usage(); |
| } |
| } |
| |
| push @ibase, "."; |
| |
| if (defined $in) { |
| $inf = gensym(); |
| open($inf, "<$in") or die "opening \"$in\": $!\n"; |
| push @ibase, $1 if $in =~ m|^(.+)/[^/]+$|; |
| } else { |
| $inf = \*STDIN; |
| } |
| |
| if (defined $out) { |
| open(STDOUT, ">$out") or die "opening \"$out\": $!\n"; |
| } |
| |
| while(defined $inf) { |
| INF: while(<$inf>) { |
| # Certain commands are discarded without further processing. |
| /^\@(?: |
| [a-z]+index # @*index: useful only in complete manual |
| |need # @need: useful only in printed manual |
| |(?:end\s+)?group # @group .. @end group: ditto |
| |page # @page: ditto |
| |node # @node: useful only in .info file |
| |(?:end\s+)?ifnottex # @ifnottex .. @end ifnottex: use contents |
| )\b/x and next; |
| |
| chomp; |
| |
| # Look for filename and title markers. |
| /^\@setfilename\s+([^.]+)/ and $fn = $1, next; |
| /^\@settitle\s+([^.]+)/ and $tl = postprocess($1), next; |
| |
| # Identify a man title but keep only the one we are interested in. |
| /^\@c\s+man\s+title\s+([A-Za-z0-9-]+)\s+(.+)/ and do { |
| if (exists $defs{$1}) { |
| $fn = $1; |
| $tl = postprocess($2); |
| } |
| next; |
| }; |
| |
| /^\@include\s+(.+)$/ and do { |
| push @instack, $inf; |
| $inf = gensym(); |
| |
| for (@ibase) { |
| open($inf, "<" . $_ . "/" . $1) and next INF; |
| } |
| die "cannot open $1: $!\n"; |
| }; |
| |
| /^\@chapter\s+([A-Za-z ]+)/ and do { |
| # close old chapter |
| $chapters{$chapter_name} .= postprocess($chapter) if ($chapter_name); |
| |
| # start new chapter |
| $chapter_name = $1, push (@chapters_sequence, $chapter_name) unless $skipping; |
| $chapters{$chapter_name} = "" unless exists $chapters{$chapter_name}; |
| $chapter = ""; |
| $output = 1; |
| next; |
| }; |
| |
| /^\@bye/ and do { |
| # close old chapter |
| $chapters{$chapter_name} .= postprocess($chapter) if ($chapter_name); |
| last INF; |
| }; |
| |
| # handle variables |
| /^\@set\s+([a-zA-Z0-9_-]+)\s*(.*)$/ and do { |
| $defs{$1} = $2; |
| next; |
| }; |
| /^\@clear\s+([a-zA-Z0-9_-]+)/ and do { |
| delete $defs{$1}; |
| next; |
| }; |
| |
| next unless $output; |
| |
| # Discard comments. (Can't do it above, because then we'd never see |
| # @c man lines.) |
| /^\@c\b/ and next; |
| |
| # End-block handler goes up here because it needs to operate even |
| # if we are skipping. |
| /^\@end\s+([a-z]+)/ and do { |
| # Ignore @end foo, where foo is not an operation which may |
| # cause us to skip, if we are presently skipping. |
| my $ended = $1; |
| next if $skipping && $ended !~ /^(?:ifset|ifclear|ignore|menu|iftex|ifhtml|ifnothtml)$/; |
| |
| die "\@end $ended without \@$ended at line $.\n" unless defined $endw; |
| die "\@$endw ended by \@end $ended at line $.\n" unless $ended eq $endw; |
| |
| $endw = pop @endwstack; |
| |
| if ($ended =~ /^(?:ifset|ifclear|ignore|menu|iftex|ifhtml|ifnothtml)$/) { |
| $skipping = pop @skstack; |
| next; |
| } elsif ($ended =~ /^(?:example|smallexample|verbatim|display)$/) { |
| $shift = ""; |
| $_ = ""; # need a paragraph break |
| } elsif ($ended =~ /^(?:itemize|enumerate|(?:multi|[fv])?table)$/) { |
| $_ = "\n=back\n"; |
| $ic = pop @icstack; |
| } elsif ($ended =~ /^float$/) { |
| $_ = "\n=back\n"; |
| $ic = pop @icstack; |
| } else { |
| die "unknown command \@end $ended at line $.\n"; |
| } |
| }; |
| |
| # We must handle commands which can cause skipping even while we |
| # are skipping, otherwise we will not process nested conditionals |
| # correctly. |
| /^\@ifset\s+([a-zA-Z0-9_-]+)/ and do { |
| push @endwstack, $endw; |
| push @skstack, $skipping; |
| $endw = "ifset"; |
| $skipping = 1 unless exists $defs{$1}; |
| next; |
| }; |
| |
| /^\@ifclear\s+([a-zA-Z0-9_-]+)/ and do { |
| push @endwstack, $endw; |
| push @skstack, $skipping; |
| $endw = "ifclear"; |
| $skipping = 1 if exists $defs{$1}; |
| next; |
| }; |
| |
| /^\@(ignore|menu|iftex|ifhtml|ifnothtml)\b/ and do { |
| push @endwstack, $endw; |
| push @skstack, $skipping; |
| $endw = $1; |
| $skipping = $endw !~ /ifnothtml/; |
| next; |
| }; |
| |
| next if $skipping; |
| |
| # Character entities. First the ones that can be replaced by raw text |
| # or discarded outright: |
| s/\@copyright\{\}/(c)/g; |
| s/\@dots\{\}/.../g; |
| s/\@enddots\{\}/..../g; |
| s/\@([.!? ])/$1/g; |
| s/\@[:-]//g; |
| s/\@bullet(?:\{\})?/*/g; |
| s/\@TeX\{\}/TeX/g; |
| s/\@pounds\{\}/\#/g; |
| s/\@minus(?:\{\})?/-/g; |
| |
| # Now the ones that have to be replaced by special escapes |
| # (which will be turned back into text by unmunge()) |
| s/&/&/g; |
| s/\@\{/{/g; |
| s/\@\}/}/g; |
| s/\@\@/&at;/g; |
| |
| # Inside a verbatim block, handle @var specially. |
| if ($shift ne "") { |
| s/\@var\{([^\}]*)\}/<$1>/g; |
| } |
| |
| # POD doesn't interpret E<> inside a verbatim block. |
| if ($shift eq "") { |
| s/</</g; |
| s/>/>/g; |
| } else { |
| s/</</g; |
| s/>/>/g; |
| } |
| |
| # Single line command handlers. |
| |
| /^\@(?:section|unnumbered|unnumberedsec|center|heading)\s+(.+)$/ |
| and $_ = "\n=head2 $1\n"; |
| /^\@(?:subsection|subheading)\s+(.+)$/ |
| and $_ = "\n=head3 $1\n"; |
| /^\@(?:subsubsection|subsubheading)\s+(.+)$/ |
| and $_ = "\n=head4 $1\n"; |
| |
| # Block command handlers: |
| /^\@itemize\s*(\@[a-z]+|\*|-)?/ and do { |
| push @endwstack, $endw; |
| push @icstack, $ic; |
| $ic = $1 ? $1 : "*"; |
| $_ = "\n=over 4\n"; |
| $endw = "itemize"; |
| }; |
| |
| /^\@enumerate(?:\s+([a-zA-Z0-9]+))?/ and do { |
| push @endwstack, $endw; |
| push @icstack, $ic; |
| if (defined $1) { |
| $ic = $1 . "."; |
| } else { |
| $ic = "1."; |
| } |
| $_ = "\n=over 4\n"; |
| $endw = "enumerate"; |
| }; |
| |
| /^\@((?:multi|[fv])?table)\s+(\@[a-z]+)/ and do { |
| push @endwstack, $endw; |
| push @icstack, $ic; |
| $endw = $1; |
| $ic = $2; |
| $ic =~ s/\@(?:samp|strong|key|gcctabopt|option|env|command)/B/; |
| $ic =~ s/\@(?:code|kbd)/C/; |
| $ic =~ s/\@(?:dfn|var|emph|cite|i)/I/; |
| $ic =~ s/\@(?:file)/F/; |
| $ic =~ s/\@(?:columnfractions)//; |
| $_ = "\n=over 4\n"; |
| }; |
| |
| /^\@(multitable)\s+{.*/ and do { |
| push @endwstack, $endw; |
| push @icstack, $ic; |
| $endw = $1; |
| $ic = ""; |
| $_ = "\n=over 4\n"; |
| }; |
| |
| /^\@((?:small)?example|verbatim|display)/ and do { |
| push @endwstack, $endw; |
| $endw = $1; |
| $shift = "\t"; |
| $_ = ""; # need a paragraph break |
| }; |
| |
| /^\@(float)\s+\w+/ and do { |
| push @endwstack, $endw; |
| $endw = $1; |
| $_ = "\n=over 4\n"; |
| }; |
| |
| /^\@item\s+(.*\S)\s*$/ and $endw eq "multitable" and do { |
| my $columns = $1; |
| $columns =~ s/\@tab/ : /; |
| |
| $_ = "\n=item B<". $columns .">\n"; |
| }; |
| |
| /^\@tab\s+(.*\S)\s*$/ and $endw eq "multitable" and do { |
| my $columns = $1; |
| $columns =~ s/\@tab//; |
| |
| $_ = $columns; |
| $chapter =~ s/$//; |
| }; |
| |
| /^\@itemx?\s*(.+)?$/ and do { |
| if (defined $1) { |
| # Entity escapes prevent munging by the <> processing below. |
| $_ = "\n=item $ic\<$1\>\n"; |
| } else { |
| $_ = "\n=item $ic\n"; |
| $ic =~ y/A-Ya-y/B-Zb-z/; |
| $ic =~ s/(\d+)/$1 + 1/eg; |
| } |
| }; |
| |
| $chapter .= $shift.$_."\n"; |
| } |
| # End of current file. |
| close($inf); |
| $inf = pop @instack; |
| } |
| |
| die "No filename or title\n" unless defined $fn && defined $tl; |
| |
| # always use utf8 |
| print "=encoding utf8\n\n"; |
| |
| $chapters{NAME} = "$fn \- $tl\n"; |
| $chapters{FOOTNOTES} .= "=back\n" if exists $chapters{FOOTNOTES}; |
| |
| unshift @chapters_sequence, "NAME"; |
| for $chapter (@chapters_sequence) { |
| if (exists $chapters{$chapter}) { |
| $head = uc($chapter); |
| print "=head1 $head\n\n"; |
| print scalar unmunge ($chapters{$chapter}); |
| print "\n"; |
| } |
| } |
| |
| sub usage |
| { |
| die "usage: $0 [-D toggle...] [infile [outfile]]\n"; |
| } |
| |
| sub postprocess |
| { |
| local $_ = $_[0]; |
| |
| # @value{foo} is replaced by whatever 'foo' is defined as. |
| while (m/(\@value\{([a-zA-Z0-9_-]+)\})/g) { |
| if (! exists $defs{$2}) { |
| print STDERR "Option $2 not defined\n"; |
| s/\Q$1\E//; |
| } else { |
| $value = $defs{$2}; |
| s/\Q$1\E/$value/; |
| } |
| } |
| |
| # Formatting commands. |
| # Temporary escape for @r. |
| s/\@r\{([^\}]*)\}/R<$1>/g; |
| s/\@(?:dfn|var|emph|cite|i)\{([^\}]*)\}/I<$1>/g; |
| s/\@(?:code|kbd)\{([^\}]*)\}/C<$1>/g; |
| s/\@(?:gccoptlist|samp|strong|key|option|env|command|b)\{([^\}]*)\}/B<$1>/g; |
| s/\@sc\{([^\}]*)\}/\U$1/g; |
| s/\@file\{([^\}]*)\}/F<$1>/g; |
| s/\@w\{([^\}]*)\}/S<$1>/g; |
| s/\@(?:dmn|math)\{([^\}]*)\}/$1/g; |
| |
| # Cross references are thrown away, as are @noindent and @refill. |
| # (@noindent is impossible in .pod, and @refill is unnecessary.) |
| # @* is also impossible in .pod; we discard it and any newline that |
| # follows it. Similarly, our macro @gol must be discarded. |
| |
| s/\@anchor\{(?:[^\}]*)\}//g; |
| s/\(?\@xref\{(?:[^\}]*)\}(?:[^.<]|(?:<[^<>]*>))*\.\)?//g; |
| s/\s+\(\@pxref\{(?:[^\}]*)\}\)//g; |
| s/;\s+\@pxref\{(?:[^\}]*)\}//g; |
| s/\@ref\{(?:[^,\}]*,)(?:[^,\}]*,)([^,\}]*).*\}/B<$1>/g; |
| s/\@ref\{([^\}]*)\}/B<$1>/g; |
| s/\@noindent\s*//g; |
| s/\@refill//g; |
| s/\@gol//g; |
| s/\@\*\s*\n?//g; |
| |
| # @uref can take one, two, or three arguments, with different |
| # semantics each time. @url and @email are just like @uref with |
| # one argument, for our purposes. |
| s/\@(?:uref|url|email)\{([^\},]*),?[^\}]*\}/<B<$1>>/g; |
| s/\@uref\{([^\},]*),([^\},]*)\}/$2 (C<$1>)/g; |
| s/\@uref\{([^\},]*),([^\},]*),([^\},]*)\}/$3/g; |
| |
| # Turn B<blah I<blah> blah> into B<blah> I<blah> B<blah> to |
| # match Texinfo semantics of @emph inside @samp. Also handle @r |
| # inside bold. |
| s/</</g; |
| s/>/>/g; |
| 1 while s/B<((?:[^<>]|I<[^<>]*>)*)R<([^>]*)>/B<$1>${2}B</g; |
| 1 while (s/B<([^<>]*)I<([^>]+)>/B<$1>I<$2>B</g); |
| 1 while (s/I<([^<>]*)B<([^>]+)>/I<$1>B<$2>I</g); |
| s/[BI]<>//g; |
| s/([BI])<(\s+)([^>]+)>/$2$1<$3>/g; |
| s/([BI])<([^>]+?)(\s+)>/$1<$2>$3/g; |
| |
| # Extract footnotes. This has to be done after all other |
| # processing because otherwise the regexp will choke on formatting |
| # inside @footnote. |
| while (/\@footnote/g) { |
| s/\@footnote\{([^\}]+)\}/[$fnno]/; |
| add_footnote($1, $fnno); |
| $fnno++; |
| } |
| |
| return $_; |
| } |
| |
| sub unmunge |
| { |
| # Replace escaped symbols with their equivalents. |
| local $_ = $_[0]; |
| |
| s/</E<lt>/g; |
| s/>/E<gt>/g; |
| s/{/\{/g; |
| s/}/\}/g; |
| s/&at;/\@/g; |
| s/&/&/g; |
| return $_; |
| } |
| |
| sub add_footnote |
| { |
| unless (exists $chapters{FOOTNOTES}) { |
| $chapters{FOOTNOTES} = "\n=over 4\n\n"; |
| } |
| |
| $chapters{FOOTNOTES} .= "=item $fnno.\n\n"; $fnno++; |
| $chapters{FOOTNOTES} .= $_[0]; |
| $chapters{FOOTNOTES} .= "\n\n"; |
| } |
| |
| # stolen from Symbol.pm |
| { |
| my $genseq = 0; |
| sub gensym |
| { |
| my $name = "GEN" . $genseq++; |
| my $ref = \*{$name}; |
| delete $::{$name}; |
| return $ref; |
| } |
| } |