xref: /openbsd-src/gnu/usr.bin/perl/win32/FindExt.pm (revision 91f110e064cd7c194e59e019b83bb7496c1c84d4) 
1package FindExt;
2
3our $VERSION = '1.02';
4
5use strict;
6use warnings;
7
8my $no = join('|',qw(GDBM_File ODBM_File NDBM_File DB_File
9                     VMS VMS-DCLsym VMS-Stdio Sys-Syslog IPC-SysV I18N-Langinfo));
10$no = qr/^(?:$no)$/i;
11
12sub apply_config {
13    my ($config) = @_;
14    my @no;
15
16    # duplicates logic from Configure (mostly)
17    push @no, "DB_File" unless $config->{i_db};
18    push @no, "GDBM_File" unless $config->{i_gdbm};
19    push @no, "I18N-Langinfo" unless $config->{i_langinfo} && $config->{i_nl_langinfo};
20    push @no, "IPC-SysV" unless $config->{d_msg} || $config->{d_sem} || $config->{d_shm};
21    push @no, "NDBM_File" unless $config->{d_ndbm};
22    push @no, "ODBM_File"
23      unless ($config->{i_dbm} || $config->{i_rpcsvcdbm}) && !$config->{d_cplusplus};
24    push @no, "VMS.*" unless $^O eq "VMS";
25    push @no, "Win32.*" unless $^O eq "MSWin32" || $^O eq "cygwin";
26
27    $no = join('|', @no);
28    $no = qr/^(?:$no)$/i;
29}
30
31my %ext;
32my %static;
33
34sub set_static_extensions {
35    # adjust results of scan_ext, and also save
36    # statics in case scan_ext hasn't been called yet.
37    # if '*' is passed then all XS extensions are static
38    # (with possible exclusions)
39    %static = ();
40    my @list = @_;
41    if (@_ and $_[0] eq '*') {
42	my %excl = map {$_=>1} map {m/^!(.*)$/} @_[1 .. $#_];
43	@list = grep {!exists $excl{$_}} keys %ext;
44    }
45    for (@list) {
46        $static{$_} = 1;
47        $ext{$_} = 'static' if $ext{$_} && $ext{$_} eq 'dynamic';
48    }
49}
50
51sub scan_ext
52{
53    my $dir  = shift;
54    find_ext("$dir/");
55    extensions();
56}
57
58sub _ext_eq {
59    my $key = shift;
60    sub {
61        sort grep $ext{$_} eq $key, keys %ext;
62    }
63}
64
65*dynamic_ext = _ext_eq('dynamic');
66*static_ext = _ext_eq('static');
67*nonxs_ext = _ext_eq('nonxs');
68
69sub _ext_ne {
70    my $key = shift;
71    sub {
72        sort grep $ext{$_} ne $key, keys %ext;
73    }
74}
75
76*extensions = _ext_ne('known');
77# faithfully copy Configure in not including nonxs extensions for the nonce
78*known_extensions = _ext_ne('nonxs');
79
80sub is_static
81{
82 return $ext{$_[0]} eq 'static'
83}
84
85sub has_xs_or_c {
86    my $dir = shift;
87    opendir my $dh, $dir or die "opendir $dir: $!";
88    while (defined (my $item = readdir $dh)) {
89        return 1 if $item =~ /\.xs$/;
90        return 1 if $item =~ /\.c$/;
91    }
92    return 0;
93}
94
95# Function to find available extensions, ignoring DynaLoader
96sub find_ext
97{
98    my $ext_dir = shift;
99    opendir my $dh, "$ext_dir";
100    while (defined (my $item = readdir $dh)) {
101        next if $item =~ /^\.\.?$/;
102        next if $item eq "DynaLoader";
103        next unless -d "$ext_dir$item";
104        my $this_ext = $item;
105        my $leaf = $item;
106
107        $this_ext =~ s!-!/!g;
108        $leaf =~ s/.*-//;
109
110	# Temporary hack to cope with smokers that are not clearing directories:
111        next if $ext{$this_ext};
112
113        if (has_xs_or_c("$ext_dir$item")) {
114            $ext{$this_ext} = $static{$this_ext} ? 'static' : 'dynamic';
115        } else {
116            $ext{$this_ext} = 'nonxs';
117        }
118        $ext{$this_ext} = 'known' if $ext{$this_ext} && $item =~ $no;
119    }
120}
121
1221;
123# Local variables:
124# cperl-indent-level: 4
125# indent-tabs-mode: nil
126# End:
127#
128# ex: set ts=8 sts=4 sw=4 et:
129