Update texi2pod.pl.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3964 c046a42c-6fe2-441c-8c8c-71466251a162

texi2pod.pl

@@ -1,23 +1,23 @@
 #! /usr/bin/perl -w
 
-#   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+#   Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
 
-# This file is part of GNU CC.
+# This file is part of GCC.
 
-# GNU CC is free software; you can redistribute it and/or modify
+# GCC 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,
+# GCC 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, 59 Temple Place - Suite 330,
-# Boston MA 02111-1307, USA.
+# along with GCC; 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
@@ -36,6 +36,7 @@ $shift = "";
 $fnno = 1;
 $inf = "";
 $ibase = "";
+@ipath = ();
 
 while ($_ = shift) {
     if (/^-D(.*)$/) {
@@ -51,6 +52,13 @@ while ($_ = shift) {
 	die "flags may only contain letters, digits, hyphens, dashes and underscores\n"
 	    unless $flag =~ /^[a-zA-Z0-9_-]+$/;
 	$defs{$flag} = $value;
+    } elsif (/^-I(.*)$/) {
+	if ($1 ne "") {
+	    $flag = $1;
+	} else {
+	    $flag = shift;
+	}
+        push (@ipath, $flag);
     } elsif (/^-/) {
 	usage();
     } else {
@@ -138,7 +146,7 @@ while(<$inf>) {
 	# 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 && $ended !~ /^(?:ifset|ifclear|ignore|menu|iftex)$/;
+	next if $skipping && $ended !~ /^(?:ifset|ifclear|ignore|menu|iftex|copying)$/;
 
 	die "\@end $ended without \@$ended at line $.\n" unless defined $endw;
 	die "\@$endw ended by \@end $ended at line $.\n" unless $ended eq $endw;
@@ -154,6 +162,8 @@ while(<$inf>) {
 	} elsif ($ended =~ /^(?:itemize|enumerate|[fv]?table)$/) {
 	    $_ = "\n=back\n";
 	    $ic = pop @icstack;
+	} elsif ($ended eq "multitable") {
+	    $_ = "\n=back\n";
 	} else {
 	    die "unknown command \@end $ended at line $.\n";
 	}
@@ -178,7 +188,7 @@ while(<$inf>) {
 	next;
     };
 
-    /^\@(ignore|menu|iftex)\b/ and do {
+    /^\@(ignore|menu|iftex|copying)\b/ and do {
 	push @endwstack, $endw;
 	push @skstack, $skipping;
 	$endw = $1;
@@ -227,11 +237,16 @@ while(<$inf>) {
     /^\@include\s+(.+)$/ and do {
 	push @instack, $inf;
 	$inf = gensym();
-
-	# Try cwd and $ibase.
-	open($inf, "<" . $1)
-	    or open($inf, "<" . $ibase . "/" . $1)
-		or die "cannot open $1 or $ibase/$1: $!\n";
+	$file = postprocess($1);
+
+	# Try cwd and $ibase, then explicit -I paths.
+	$done = 0;
+	foreach $path ("", $ibase, @ipath) {
+	    $mypath = $file;
+	    $mypath = $path . "/" . $mypath if ($path ne "");
+	    open($inf, "<" . $mypath) and ($done = 1, last);
+	}
+	die "cannot find $file" if !$done;
 	next;
     };
 
@@ -239,12 +254,18 @@ while(<$inf>) {
 	and $_ = "\n=head2 $1\n";
     /^\@subsection\s+(.+)$/
 	and $_ = "\n=head3 $1\n";
+    /^\@subsubsection\s+(.+)$/
+	and $_ = "\n=head4 $1\n";
 
     # Block command handlers:
-    /^\@itemize\s+(\@[a-z]+|\*|-)/ and do {
+    /^\@itemize(?:\s+(\@[a-z]+|\*|-))?/ and do {
 	push @endwstack, $endw;
 	push @icstack, $ic;
-	$ic = $1;
+	if (defined $1) {
+	    $ic = $1;
+	} else {
+	    $ic = '*';
+	}
 	$_ = "\n=over 4\n";
 	$endw = "itemize";
     };
@@ -261,6 +282,12 @@ while(<$inf>) {
 	$endw = "enumerate";
     };
 
+    /^\@multitable\s.*/ and do {
+	push @endwstack, $endw;
+	$endw = "multitable";
+	$_ = "\n=over 4\n";
+    };
+
     /^\@([fv]?table)\s+(\@[a-z]+)/ and do {
 	push @endwstack, $endw;
 	push @icstack, $ic;
@@ -280,10 +307,19 @@ while(<$inf>) {
 	$_ = "";	# need a paragraph break
     };
 
+    /^\@item\s+(.*\S)\s*$/ and $endw eq "multitable" and do {
+	@columns = ();
+	for $column (split (/\s*\@tab\s*/, $1)) {
+	    # @strong{...} is used a @headitem work-alike
+	    $column =~ s/^\@strong{(.*)}$/$1/;
+	    push @columns, $column;
+	}
+	$_ = "\n=item ".join (" : ", @columns)."\n";
+    };
+
     /^\@itemx?\s*(.+)?$/ and do {
 	if (defined $1) {
 	    # Entity escapes prevent munging by the <> processing below.
-#            print "$ic\n";
 	    $_ = "\n=item $ic\&LT;$1\&GT;\n";
 	} else {
 	    $_ = "\n=item $ic\n";
@@ -346,6 +382,13 @@ sub postprocess
     s/\@w\{([^\}]*)\}/S<$1>/g;
     s/\@(?:dmn|math)\{([^\}]*)\}/$1/g;
 
+    # keep references of the form @ref{...}, print them bold
+    s/\@(?:ref)\{([^\}]*)\}/B<$1>/g;
+
+    # Change double single quotes to double quotes.
+    s/''/"/g;
+    s/``/"/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
@@ -359,6 +402,9 @@ sub postprocess
     s/\@gol//g;
     s/\@\*\s*\n?//g;
 
+    # Anchors are thrown away
+    s/\@anchor\{(?:[^\}]*)\}//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.
@@ -366,14 +412,18 @@ sub postprocess
     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.
+    # Un-escape <> at this point.
     s/&LT;/</g;
     s/&GT;/>/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);
+
+    # Now un-nest all B<>, I<>, R<>.  Theoretically we could have
+    # indefinitely deep nesting; in practice, one level suffices.
+    1 while s/([BIR])<([^<>]*)([BIR])<([^<>]*)>/$1<$2>$3<$4>$1</g;
+
+    # Replace R<...> with bare ...; eliminate empty markup, B<>;
+    # shift white space at the ends of [BI]<...> expressions outside
+    # the expression.
+    s/R<([^<>]*)>/$1/g;
     s/[BI]<>//g;
     s/([BI])<(\s+)([^>]+)>/$2$1<$3>/g;
     s/([BI])<([^>]+?)(\s+)>/$1<$2>$3/g;