#! /usr/local/bin/perl
eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
    if 0;

#                                                         -*- Perl -*-
# Copyright (C) 1997, 1998  Motoyuki Kasahara
#
# This program 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.
# 
# This program 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.

#
# This program is a Perl package running on Perl 4.036 or later.
# The package provides routines to process command line options like
# as GNU getopt_long().
#
# Version:
#     2.0.2
#
# Interface:
#
#   &getopt_initialize(LIST)
#     Set a list of command line options and initialize internal data
#     for &getopt_long.
#     You must call the routine before calling &getopt_long.
#     Format of each element in the LIST is:
#
#         `CANONICAL-OPTION-NAME [ALIAS-OPTION-NAME...] ARGUMENT-FLAG'
#
#     CANONICAL-OPTION-NAME, ALIAS-OPTION-NAME and ARGUMENT-FLAG fields
#     are separated by spaces or tabs.
#
#     CANONICAL-OPTION-NAME and ALIAS-OPTION-NAME must be either a single
#     character option including preceding `-' (e.g. `-v'), or a long
#     name option including preceding `--' (e.g. `--version').  Whether
#     CANONICAL-OPTION-NAME is single character option or long name
#     option is not significant.
#
#     ARGUMENT-FLAG must be `no-argument', `required-argument' or 
#     `optional-argument'.  If it is set to `required-argument', the
#     option always takes an argument.  If set to `optional-argument',
#     an argument to the option is optional.
#
#     You can put a special element `+' or `-' at the first element in
#     LIST.  See `Details about Option Processing:' for details.
#     If succeeded to initialize, 1 is returned.  Otherwise 0 is
#     returned.
#
#   &getopt_long
#     Get a option name, and if exists, its argument of the leftmost
#     option in @ARGV.
#
#     An option name and its argument are returned as a list with two
#     elements; the first element is CANONICAL-OPTION-NAME of the option,
#     and second is its argument.
#     Upon return, the option and its argument are removed from @ARGV.
#     When you have already got all options in @ARGV, an empty list is
#     returned.  In this case, only non-option elements are left in
#     @ARGV.
#
#     When an error occurs, an error message is output to standard
#     error, and the option name in a returned list is set to `?'.
#
# Example:
#
#     &getopt_intialize('--help -h no-argument', '--version -v no-argument')
#         || die;
#
#     while (($name, $arg) = &getopt_long) {
#         die "For help, type \`$0 --help\'\n" if ($name eq '?');
#         $opts{$name} = $arg;
#     }
#
# Details about Option Processing:
#
#   * There are three processing modes:
#     1. PERMUTE
#        It permutes the contents of ARGV as it scans, so that all the
#        non-option ARGV-elements are at the end.  This mode is default.
#     2. REQUIRE_ORDER
#        It stops option processing when the first non-option is seen.
#        This mode is chosen if the environment variable POSIXLY_CORRECT
#        is defined, or the first element in the option list is `+'.
#     3. RETURN_IN_ORDER
#        It describes each non-option ARGV-element as if it were the
#        argument of an option with an empty name.
#        This mode is chosen if the first element in the option list is
#        `-'.
#
#   * An argument starting with `-' and not exactly `-', is a single
#     character option.
#     If the option takes an argument, it must be specified at just
#     behind the option name (e.g. `-f/tmp/file'), or at the next
#     ARGV-element of the option name (e.g. `-f /tmp/file').
#     If the option doesn't have an argument, other single character
#     options can be followed within an ARGV-element.  For example,
#     `-l -g -d' is identical to `-lgd'.
#     
#   * An argument starting with `--' and not exactly `--', is a long
#     name option.
#     If the option has an argument, it can be specified at behind the
#     option name preceded by `=' (e.g. `--option=argument'), or at the
#     next ARGV-element of the option name (e.g. `--option argument').
#     Long name options can be abbreviated as long as the abbreviation
#     is unique.
#
#   * The special argument `--' forces an end of option processing.
#

{
    package getopt_long;

    $initflag = 0;
    $REQUIRE_ORDER = 0;
    $PERMUTE = 1;
    $RETURN_IN_ORDER = 2;
}


#
# Initialize the internal data.
#
sub getopt_initialize {
    local(@fields);
    local($name, $flag, $canon);
    local($_);

    #
    # Determine odering.
    #
    if ($_[$[] eq '+') {
	$getopt_long'ordering = $getopt_long'REQUIRE_ORDER;
	shift(@_);
    } elsif ($_[$[] eq '-') {
	$getopt_long'ordering = $getopt_long'RETURN_IN_ORDER;
	shift(@_);
    } elsif (defined($ENV{'POSIXLY_CORRECT'})) {
	$getopt_long'ordering = $getopt_long'REQUIRE_ORDER;
    } else {
	$getopt_long'ordering = $getopt_long'PERMUTE;
    }

    #
    # Parse an option list.
    #
    %getopt_long'optnames = ();
    %getopt_long'argflags = ();

    foreach (@_) {
	@fields = split(/[ \t]+/, $_);
	if (@fields < 2) {
	    warn "$0: (getopt_initialize) too few fields \`$arg\'\n";
	    return 0;
	}
	$flag = pop(@fields);
	if ($flag ne 'no-argument' && $flag ne 'required-argument'
	    && $flag ne 'optional-argument') {
	    warn "$0: (getopt_initialize) invalid argument flag \`$flag\'\n";
	    return 0;
	}

	$canon = '';
	foreach $name (@fields) {
	    if ($name !~ /^-([^-]|-.+)$/) {
		warn "$0: (getopt_initialize) invalid option name \`$name\'\n";
		return 0;
	    } elsif (defined($getopt_long'optnames{$name})) {
		warn "$0: (getopt_initialize) redefined option \`$name\'\n";
		return 0;
	    }
	    $canon = $name if ($canon eq '');
	    $getopt_long'optnames{$name} = $canon;
	    $getopt_long'argflags{$name} = $flag;
	}
    }

    $getopt_long'endflag = 0;
    $getopt_long'shortrest = '';
    @getopt_long'nonopts = ();

    $getopt_long'initflag = 1;
}


#
# When it comes to the end of options, restore PERMUTEd non-option
# arguments to @ARGV.
#
sub getopt_end {
    $getopt_long'endflag = 1;
    unshift(@ARGV, @getopt_long'nonopts);
}


#
# Scan elements of @ARGV for getting an option.
#
sub getopt_long {
    local($name, $arg) = ('?', '');
    local($key, $pattern, $match_count, $ch);
    local($_);

    &getopt_initialize(@_) if (!$getopt_long'initflag);
    return () if ($getopt_long'endflag);

    #
    # Get next option argument.
    #
    if ($getopt_long'shortrest ne '') {
	$_ = '-'.$getopt_long'shortrest;
    } elsif (@ARGV == 0) {
	&getopt_end;
	return ();
    } elsif ($getopt_long'ordering == $getopt_long'PERMUTE) {
	while (0 < @ARGV && $ARGV[$[] !~ /^-./) {
	    push(@getopt_long'nonopts, shift(@ARGV));
	}
	if (@ARGV == 0) {
	    &getopt_end;
	    return ();
	}
	$_ = shift(@ARGV);
    } elsif ($getopt_long'ordering == $getopt_long'REQUIRE_ORDER) {
	$_ = shift(@ARGV);
	if (!/^-./) {
	    push(@getopt_long'nonopts, $_);
	    &getopt_end;
	    return ();
	}
    } else {
	# $getopt_long'ordering == RETURN_IN_ORDER
	$_ = shift(@ARGV);
    }

    #
    # Check the special argument `--'.
    # `--' indicates the end of the option list.
    #
    if ($_ eq '--' && $getopt_long'shortrest eq '') {
	#
	# `--' indicates the end of the option list.
	#
	&getopt_end;
	return ();
    }

    #
    # Check for long and short options.
    #
    if (/^(--[^=]+)/ && $getopt_long'shortrest eq '') {
	#
	# This is a long style option, which start with `--'.
	#
	$pattern = $1;
	if (defined($getopt_long'optnames{$pattern})) {
	    $name = $pattern;
	} else {
	    #
	    # The option `name' is not registered in `@optnames'.
	    # It may be an abbreviated
	    #
	    $match_count = 0;
	    foreach $key (keys(%getopt_long'optnames)) {
		if (index($key, $pattern) == 0) {
		    $name = $key;
		    $match_count++;
		}
	    }
	    if (2 <= $match_count) {
		warn "$0: option \`$_\' is ambiguous\n";
		return ('?', '');
	    } elsif ($match_count == 0) {
		warn "$0: unrecognized option \`$_\'\n";
		return ('?', '');
	    }
	}

	#
	# Check an argument to the option.
	#
	if ($getopt_long'argflags{$name} eq 'required-argument') {
	    if (/=(.*)$/) {
		$arg = $1;
	    } elsif (0 < @ARGV) {
		$arg = shift(@ARGV);
	    } else {
		warn "$0: option \`$_\' requires an argument\n";
		return ('?', '');
	    }
	} elsif ($getopt_long'argflags{$name} eq 'optional-argument') {
	    if (/=(.*)$/) {
		$arg = $1;
	    } elsif (0 < @ARGV && $ARGV[$[] !~ /^-./) {
		$arg = shift(@ARGV);
	    } else {
		$arg = '';
	    }
	} elsif (/=(.*)$/) {
	    warn "$0: option \`$name\' doesn't allow an argument\n";
	    return ('?', '');
	}
    } elsif (/^(-(.))(.*)/) {
	#
	# This is a short style option, which start with `-' (not `--').
	# Short options may be catinated (e.g. `-l -g' is equivalent to
	# `-lg').
	#
	($name, $ch, $getopt_long'shortrest) = ($1, $2, $3);

	if (defined($getopt_long'optnames{$name})) {
	    #
	    # The option `name' is found in `@optnames'.
	    # Check its argument.
	    #
	    if ($getopt_long'argflags{$name} eq 'required-argument') {
		if ($getopt_long'shortrest ne '') {
		    $arg = $getopt_long'shortrest;
		    $getopt_long'shortrest = '';
		} elsif (0 < @ARGV) {
		    $arg = shift(@ARGV);
		} else {
		    # 1003.2 specifies the format of this message.
		    warn "$0: option requires an argument -- $ch\n";
		    return ('?', '');
		}
	    } elsif ($getopt_long'argflags{$name} eq 'optional-argument') {
		if ($getopt_long'shortrest ne '') {
		    $arg = $getopt_long'shortrest;
		    $getopt_long'shortrest = '';
		} elsif (0 < @ARGV && $ARGV[$[] !~ /^-./) {
		    $arg = shift(@ARGV);
		} else {
		    $arg = '';
		}
	    }
	} else {
	    #
	    # This is an invalid option.
	    # 1003.2 specifies the format of this message.
	    #
	    if (defined($ENV{'POSIXLY_CORRECT'})) {
		warn "$0: illegal option -- $ch\n";
		return ('?', '');
	    } else {
		warn "$0: invalid option -- $ch\n";
		return ('?', '');
	    }
	}
    } else {
	#
	# This is a non-option argument.
	# Only RETURN_IN_ORDER falled into here.
	#
	return ('', $_);
    }

    return ($getopt_long'optnames{$name}, $arg);
}

1;
#                                                         -*- Perl -*-
# info2txt -- Convert a Info document to plain text.
#
# Copyright (C) 1997  Motoyuki Kasahara
#
# This program 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.
# 
# This program 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.

eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
    if 0;

# Program name, version and mailing address
$progname ='info2txt';
$version = '1.2';
$mailing_address = '@MAILING_ADDRESS@';

$help = "Usage: $progname [option...] [info-file]
Options:
  -h, --help                 display this help, then exit
  -S, --no-split             don\'t read split info-files
  -v, --version              display version number, then exit

Report bugs to $mailing_address.
";

$tryhelp = "try \`$0 --help\' for more information\n";

@option_list = ('-h --help     no-argument',
		'-S --no-split no-argument',
                '-v --version  no-argument');

$columns = 70;

#
# Parse command line options.
#
$split_mode = 1;
&getopt_initialize(@option_list);
while (($opt, $arg) = &getopt_long) {
    if ($opt eq '-h') {
        print $help;
        exit(0);
    } elsif ($opt eq '-S') {
	$split_mode = 0;
    } elsif ($opt eq '-v') {
	print "$progname version $version\n\n";
	print "Copyright (c) 1997, 1998  Motoyuki Kasahara\n\n";
	print "This is free software; you can redistribute it and/or modify\n";
	print "it under the terms of the GNU General Public License as published
 by\n";
	print "the Free Software Foundation; either version 2, or (at your optio
n)\n";
	print "any later version.\n\n";
	print "This program is distributed in the hope that it will be useful,\n
";
	print "but WITHOUT ANY WARRANTY; without even the implied warranty\n";
	print "of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the\n";
	print "GNU General Public License for more details.\n";
	exit(0);
    } else {
        die $tryhelp;
    }
}

die "too many arguments\n$tryhelp" if (2 <= @ARGV);

#
# Search `info-file-1', `info-file-2', ... when `--no-split' and `-S'
# are not specified.
#
if ($split_mode && @ARGV == 1 && -f "$ARGV[0]-1") {
    $basename = pop(@ARGV);
    push(@ARGV, "$basename-1");
    for ($i = 2; -f "$basename-$i"; $i++) {
	push(@ARGV, "$basename-$i");
    }
}

#
# Main loop.
#
($STATUS_TEXT, $STATUS_DIR_ENTRY, $STATUS_NODE, $STATUS_MENU) = (0..4);

while (<>) {
    if (/Tag Table:/) {
	last;
    } elsif (/^START-INFO-DIR-ENTRY/) {
	$status = $STATUS_DIR_ENTRY;
	$dir_entry++;
    } elsif (/^END-INFO-DIR-ENTRY/) {
	$status = $STATUS_TEXT;
	print "\n" if ($dir_entry == 1);
    } elsif (/^\* Menu:/) {
	$status = $STATUS_MENU;
    } elsif (/^\037/) {
	$status = $STATUS_NODE;
    } elsif ($status == $STATUS_NODE && /Node: Top,/) {
	$top_node = 1;
    } elsif ($status == $STATUS_DIR_ENTRY && $dir_entry == 1) {
	if (($name, $title) = /^\* ([^:]*): \([^\)]*\)\.[ \t]+(.*)$/) {
	    $is_title = 1;
	    $namepad = ($columns - length($name)) / 2;
	    $titlepad = ($columns - length($title)) / 2;
	    print "\n";
	    print ' ' x $namepad if (0 < $namepad);
	    print "$name\n";
	    print ' ' x $titlepad if (0 < $titlepad);
	    print "$title\n";
	} elsif (s/^[ \t]+// && $is_title) {
	    chop;
	    $titlepad = ($columns - length($_)) / 2;
	    print ' ' x $titlepad if (0 < $titlepad);
	    print "$_\n";
	} else {
	    $is_title = 0;
	}
    } else {
	print if ($status == $STATUS_TEXT && $top_node);
	$status = $STATUS_TEXT if ($status == $STATUS_NODE);
    }
}

# Local Variables: 
# mode: perl
# End: