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#!/usr/bin/perl

# -*- perl -*-

#   Copyright (C) 2001, 2009, 2011

#   Free Software Foundation

#

# This file is part of the libiberty library.

# Libiberty is free software; you can redistribute it and/or

# modify it under the terms of the GNU Library General Public

# License as published by the Free Software Foundation; either

# version 2 of the License, or (at your option) any later version.

#

# Libiberty 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

# Library General Public License for more details.

#

# You should have received a copy of the GNU Library General Public

# License along with libiberty; see the file COPYING.LIB.  If not,

# write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,

# Boston, MA 02110-1301, USA.

#

# Originally written by DJ Delorie 

# This program looks for texinfo snippets in source files and other

# files, and builds per-category files with entries sorted in

# alphabetical order.

# The syntax it looks for is lines starting with '@def' in *.c and

# other files (see TEXIFILES in Makefile.in).  Entries are terminated

# at the next @def* (which begins a new entry) or, for C files, a line

# that begins with '*/' without leading spaces (this assumes that the

# texinfo snippet is within a C-style /* */ comment).

#

if ($ARGV[0] eq "-v") {

    $verbose = 1;

    shift;

}

$srcdir = shift;

$outfile = shift;

if ($outfile !~ /\S/ || ! -f "$srcdir/Makefile.in" ) {

    print STDERR "Usage: gather-docs [-v] srcdir outfile.txi [files with snippets in them ...]\n";

    exit 1;

}

$errors = 0;

for $in (@ARGV) {

    if (!open(IN, "$srcdir/$in")) {

        print STDERR "Cannot open $srcdir/$in for reading: $!\n";

        $errors ++;

    } else {

        $first = 1;

        $pertinent = 0;

        $man_mode = 0;

        $line = 0;

        while () {

            $line ++;

            $pertinent = 1 if /^\@def[a-z]*[a-wyz] /;

            $pertinent = 0 if /^\*\//;

            next unless $pertinent;

            if (/^\@def[a-z]*[a-wyz] /) {

                ($name) = m/[^\(]* ([^\( \t\r\n\@]+) *(\(|\@?$)/;

                $name =~ s/[     ]*\@?$//;

                $key = $name;

                $key =~ tr/A-Z/a-z/;

                $key =~ s/[^a-z0-9]+/ /g;

                $name{$key} = $node;

                $lines{$key} = '';

                $src_file{$key} = $in;

                $src_line{$key} = $line;

                print "\nReading $in :" if $verbose && $first;

                $first = 0;

                print " $name" if $verbose;

                $node_lines{$key} .= $_;

            } else {

                $node_lines{$key} .= $_;

            }

            $pertinent = 0 if /^\@end def/;

        }

        close (IN);

    }

}

print "\n" if $verbose;

exit $errors if $errors;

if (!open (OUT, "> $outfile")) {

    print STDERR "Cannot open $outfile for writing: $!\n";

    $errors ++;

    next;

}

print "Writing $outfile\n" if $verbose;

print OUT "\@c Automatically generated from *.c and others (the comments before\n";

print OUT "\@c each entry tell you which file and where in that file).  DO NOT EDIT!\n";

print OUT "\@c Edit the *.c files, configure with --enable-maintainer-mode,\n";

print OUT "\@c run 'make stamp-functions' and gather-docs will build a new copy.\n\n";

for $key (sort keys %name) {

    print OUT "\@c $src_file{$key}:$src_line{$key}\n";

    print OUT $node_lines{$key};

    print OUT "\n";

}

if (! print OUT "\n") {

    print STDERR "Disk full writing $srcdir/$cat.texi\n";

    $errors ++;

}

close (OUT);

exit $errors;