mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 09:55:55 +00:00
![Michael Tokarev](/assets/img/avatar_default.png)
We've at least one UTF8 char in the qemu texi doc: $ grep Tibor qemu-doc.texi by Tibor "TS" Schütz. $ man ./qemu.1 | grep Tibor by Tibor "TS" SchA~Xtz. This patch allows utf8 in man/pod docs. Initially it was split into two parts and sent on 2012-02-02. Resending it again (3rd time) now in merged form. If any other generalizations of $(POD2MAN) are needed it can be done in a separate patch. Current form of $(POD2MAN) is choosen to be able to easily change it if some implementation does not support utf8 or resulting output has issues with local man(1) program/macros. First, add @documentencoding in scripts/texi2pod.pl: Currently our texi2pod ignores @documentencoding even if it is set properly in *.texi files. This results in a mojibake in documents generated from qemu.pod (which is generated from qemu-doc.texi by texi2pod), because the rest of the tools assumes ASCII encoding. This patch recognizes first @documentencoding in input and places it at the beginning of output as =encoding directive. Second, run pod2man with --utf8 option to enable utf8 in manpages: This option makes no difference for manpages which contains only ascii chars. But for manpages with actual UTF8 characters (qemu docs contains these), this change allows to see real characters instead of mojibakes or substitutes. Signed-off-By: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
487 lines
12 KiB
Prolog
Executable file
487 lines
12 KiB
Prolog
Executable file
#! /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 2, 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,
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# see <http://www.gnu.org/licenses/>.
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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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$encoding = undef;
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while ($_ = 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($1), next;
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# Look for document encoding
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/^\@documentencoding\s+([^.]+)/ and do {
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$encoding = $1 unless defined $encoding;
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next;
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};
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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/\@([.!? ])/$1/g;
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s/\@[:-]//g;
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s/\@bullet(?:\{\})?/*/g;
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s/\@TeX\{\}/TeX/g;
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s/\@pounds\{\}/\#/g;
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s/\@minus(?:\{\})?/-/g;
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s/\\,/,/g;
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# Now the ones that have to be replaced by special escapes
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# (which will be turned back into text by unmunge())
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s/&/&/g;
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s/\@\{/{/g;
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s/\@\}/}/g;
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s/\@\@/&at;/g;
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# Inside a verbatim block, handle @var specially.
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if ($shift ne "") {
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s/\@var\{([^\}]*)\}/<$1>/g;
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}
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# POD doesn't interpret E<> inside a verbatim block.
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if ($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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}
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# Single line command handlers.
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/^\@include\s+(.+)$/ and do {
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push @instack, $inf;
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$inf = gensym();
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$file = postprocess($1);
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# Try cwd and $ibase, then explicit -I paths.
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$done = 0;
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foreach $path ("", $ibase, @ipath) {
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$mypath = $file;
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$mypath = $path . "/" . $mypath if ($path ne "");
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open($inf, "<" . $mypath) and ($done = 1, last);
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}
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die "cannot find $file" if !$done;
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next;
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};
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/^\@(?:section|unnumbered|unnumberedsec|center)\s+(.+)$/
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and $_ = "\n=head2 $1\n";
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/^\@subsection\s+(.+)$/
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and $_ = "\n=head3 $1\n";
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/^\@subsubsection\s+(.+)$/
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and $_ = "\n=head4 $1\n";
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# Block command handlers:
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/^\@itemize(?:\s+(\@[a-z]+|\*|-))?/ and do {
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push @endwstack, $endw;
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push @icstack, $ic;
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if (defined $1) {
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$ic = $1;
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} else {
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$ic = '*';
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}
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$_ = "\n=over 4\n";
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$endw = "itemize";
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};
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/^\@enumerate(?:\s+([a-zA-Z0-9]+))?/ and do {
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push @endwstack, $endw;
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push @icstack, $ic;
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if (defined $1) {
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$ic = $1 . ".";
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} else {
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$ic = "1.";
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}
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$_ = "\n=over 4\n";
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$endw = "enumerate";
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};
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/^\@multitable\s.*/ and do {
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push @endwstack, $endw;
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$endw = "multitable";
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$_ = "\n=over 4\n";
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};
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/^\@([fv]?table)\s+(\@[a-z]+)/ and do {
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push @endwstack, $endw;
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push @icstack, $ic;
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$endw = $1;
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$ic = $2;
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$ic =~ s/\@(?:samp|strong|key|gcctabopt|option|env)/B/;
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$ic =~ s/\@(?:code|kbd)/C/;
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$ic =~ s/\@(?:dfn|var|emph|cite|i)/I/;
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$ic =~ s/\@(?:file)/F/;
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$_ = "\n=over 4\n";
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};
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/^\@((?:small)?example|display)/ and do {
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push @endwstack, $endw;
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$endw = $1;
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$shift = "\t";
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$_ = ""; # need a paragraph break
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};
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/^\@item\s+(.*\S)\s*$/ and $endw eq "multitable" and do {
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@columns = ();
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for $column (split (/\s*\@tab\s*/, $1)) {
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# @strong{...} is used a @headitem work-alike
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$column =~ s/^\@strong{(.*)}$/$1/;
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push @columns, $column;
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}
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$_ = "\n=item ".join (" : ", @columns)."\n";
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};
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/^\@itemx?\s*(.+)?$/ and do {
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if (defined $1) {
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# Entity escapes prevent munging by the <> processing below.
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$_ = "\n=item $ic\<$1\>\n";
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} else {
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$_ = "\n=item $ic\n";
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$ic =~ y/A-Ya-y/B-Zb-z/;
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$ic =~ s/(\d+)/$1 + 1/eg;
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}
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};
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$section .= $shift.$_."\n";
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}
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# End of current file.
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close($inf);
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$inf = pop @instack;
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}
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die "No filename or title\n" unless defined $fn && defined $tl;
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print "=encoding $encoding\n\n" if defined $encoding;
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$sects{NAME} = "$fn \- $tl\n";
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$sects{FOOTNOTES} .= "=back\n" if exists $sects{FOOTNOTES};
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for $sect (qw(NAME SYNOPSIS DESCRIPTION OPTIONS ENVIRONMENT FILES
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BUGS NOTES FOOTNOTES SEEALSO AUTHOR COPYRIGHT)) {
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if(exists $sects{$sect}) {
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$head = $sect;
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$head =~ s/SEEALSO/SEE ALSO/;
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print "=head1 $head\n\n";
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print scalar unmunge ($sects{$sect});
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print "\n";
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}
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}
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sub usage
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{
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die "usage: $0 [-D toggle...] [infile [outfile]]\n";
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}
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sub postprocess
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{
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local $_ = $_[0];
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# @value{foo} is replaced by whatever 'foo' is defined as.
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while (m/(\@value\{([a-zA-Z0-9_-]+)\})/g) {
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if (! exists $defs{$2}) {
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print STDERR "Option $2 not defined\n";
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s/\Q$1\E//;
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} else {
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$value = $defs{$2};
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s/\Q$1\E/$value/;
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}
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}
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# Formatting commands.
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# Temporary escape for @r.
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s/\@r\{([^\}]*)\}/R<$1>/g;
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s/\@(?:dfn|var|emph|cite|i)\{([^\}]*)\}/I<$1>/g;
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s/\@(?:code|kbd)\{([^\}]*)\}/C<$1>/g;
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s/\@(?:gccoptlist|samp|strong|key|option|env|command|b)\{([^\}]*)\}/B<$1>/g;
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s/\@sc\{([^\}]*)\}/\U$1/g;
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s/\@file\{([^\}]*)\}/F<$1>/g;
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s/\@w\{([^\}]*)\}/S<$1>/g;
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s/\@(?:dmn|math)\{([^\}]*)\}/$1/g;
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# keep references of the form @ref{...}, print them bold
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s/\@(?:ref)\{([^\}]*)\}/B<$1>/g;
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# Change double single quotes to double quotes.
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s/''/"/g;
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s/``/"/g;
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# Cross references are thrown away, as are @noindent and @refill.
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# (@noindent is impossible in .pod, and @refill is unnecessary.)
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# @* is also impossible in .pod; we discard it and any newline that
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# follows it. Similarly, our macro @gol must be discarded.
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s/\(?\@xref\{(?:[^\}]*)\}(?:[^.<]|(?:<[^<>]*>))*\.\)?//g;
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s/\s+\(\@pxref\{(?:[^\}]*)\}\)//g;
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s/;\s+\@pxref\{(?:[^\}]*)\}//g;
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s/\@noindent\s*//g;
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s/\@refill//g;
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s/\@gol//g;
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s/\@\*\s*\n?//g;
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# Anchors are thrown away
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s/\@anchor\{(?:[^\}]*)\}//g;
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# @uref can take one, two, or three arguments, with different
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# semantics each time. @url and @email are just like @uref with
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# one argument, for our purposes.
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s/\@(?:uref|url|email)\{([^\},]*)\}/<B<$1>>/g;
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s/\@uref\{([^\},]*),([^\},]*)\}/$2 (C<$1>)/g;
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s/\@uref\{([^\},]*),([^\},]*),([^\},]*)\}/$3/g;
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# Un-escape <> at this point.
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s/</</g;
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s/>/>/g;
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# Now un-nest all B<>, I<>, R<>. Theoretically we could have
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# indefinitely deep nesting; in practice, one level suffices.
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1 while s/([BIR])<([^<>]*)([BIR])<([^<>]*)>/$1<$2>$3<$4>$1</g;
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# Replace R<...> with bare ...; eliminate empty markup, B<>;
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# shift white space at the ends of [BI]<...> expressions outside
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# the expression.
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s/R<([^<>]*)>/$1/g;
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s/[BI]<>//g;
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s/([BI])<(\s+)([^>]+)>/$2$1<$3>/g;
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s/([BI])<([^>]+?)(\s+)>/$1<$2>$3/g;
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# Extract footnotes. This has to be done after all other
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# processing because otherwise the regexp will choke on formatting
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# inside @footnote.
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while (/\@footnote/g) {
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s/\@footnote\{([^\}]+)\}/[$fnno]/;
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add_footnote($1, $fnno);
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$fnno++;
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}
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return $_;
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}
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sub unmunge
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{
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# Replace escaped symbols with their equivalents.
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local $_ = $_[0];
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s/</E<lt>/g;
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s/>/E<gt>/g;
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s/{/\{/g;
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s/}/\}/g;
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s/&at;/\@/g;
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s/&/&/g;
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return $_;
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}
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sub add_footnote
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{
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unless (exists $sects{FOOTNOTES}) {
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|
$sects{FOOTNOTES} = "\n=over 4\n\n";
|
|
}
|
|
|
|
$sects{FOOTNOTES} .= "=item $fnno.\n\n"; $fnno++;
|
|
$sects{FOOTNOTES} .= $_[0];
|
|
$sects{FOOTNOTES} .= "\n\n";
|
|
}
|
|
|
|
# stolen from Symbol.pm
|
|
{
|
|
my $genseq = 0;
|
|
sub gensym
|
|
{
|
|
my $name = "GEN" . $genseq++;
|
|
my $ref = \*{$name};
|
|
delete $::{$name};
|
|
return $ref;
|
|
}
|
|
}
|