1#!/usr/bin/perl
2
3# Generate build_info.c.
4
5# Copyright (C) 2009 Free Software Foundation, Inc.
6
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 3 of the License, or
10# (at your option) any later version.
11
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16
17# You should have received a copy of the GNU General Public License
18# along with this program.  If not, see <http://www.gnu.org/licenses/>.
19
20use strict;
21use warnings;
22
23use FindBin qw($Bin);
24use File::Spec ();
25
26my $file = shift @ARGV;
27
28{
29    my $data = parse_config();
30    output_code($data);
31}
32
33sub parse_config
34{
35    my (%block, @defines, %feature);
36
37    open(my $fh, '<', $file) or die "Cannot open $file: $!";
38    my $cfg = do { local $/; <$fh> };
39    close($fh);
40
41    while ($cfg =~ /^\ *? (\w+) (?:\s+?)? (\w+?)? \s*$/gmx) {
42        $feature{$1} = $2 || '_MISSING';
43        push @defines, $1;
44    }
45    while ($cfg =~ /^(\ *? \#\w+? \s+? (\w+) .+ \#\w+)/gmsx) {
46        $block{$2} = $1;
47    }
48
49    my %data = (
50        block   => \%block,
51        defines => \@defines,
52        feature => \%feature,
53    );
54
55    return \%data;
56}
57
58sub output_code
59{
60    my ($block, $defines, $feature) =
61      map $_[0]->{$_}, qw(block defines feature);
62
63    print do { local $/; <DATA> }, "\n";
64    print <<EOC;
65const char* (compiled_features[]) =
66{
67
68EOC
69    my @output;
70    foreach my $define (@$defines) {
71        if (!exists $block->{$define}) {
72            push @output, <<EOC;
73#ifdef $define
74  "+$feature->{$define}",
75#else
76  "-$feature->{$define}",
77#endif
78EOC
79        }
80        else {
81            push @output, <<EOC;
82$block->{$define}
83EOC
84        }
85    }
86    print join "\n", @output;
87    print <<EOC;
88
89  /* sentinel value */
90  NULL
91};
92
93
94EOC
95}
96
97__DATA__
98/* Autogenerated by build_info.pl - DO NOT EDIT */
99
100/* This stores global variables that are initialized with
101   preprocessor declarations for output with the --version flag.
102
103   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
104   2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.  */
105
106#include "wget.h"
107#include <stdio.h>
108