glew-cmake/auto/bin/make_init.pl

#!/usr/bin/perl
#
# Copyright (C) 2003 Marcelo E. Magallon <mmagallo@debian.org>
# Copyright (C) 2003 Milan Ikits <milan.ikits@ieee.org>
#
# This program is distributed under the terms and conditions of the GNU
# General Public License Version 2 as published by the Free Software
# Foundation or, at your option, any later version.

use strict;
use warnings;

do 'bin/make.pl';

#---------------------------------------------------------------------------------------

# function pointer definition
sub make_pfn_def($%)
{
    return "PFN" . (uc $_[0]) . "PROC " . prefixname($_[0]) . " = NULL;";
}

# function pointer definition
sub make_pfn_def_init($%)
{
    my $name = prefixname($_[0]);
    return "  r = ((" . $name . " = (PFN" . (uc $_[0]) . "PROC)glewGetProcAddress(\"" . $_[0] . "\")) == NULL) || r;";
}

#---------------------------------------------------------------------------------------

my @extlist = ();
my %extensions = ();

if (@ARGV)
{
    @extlist = @ARGV;
} else {
    local $/;
    @extlist = split "\n", (<>);
}

foreach my $ext (sort @extlist)
{
    my ($extname, $exturl, $types, $tokens, $functions, $exacts) = parse_ext($ext);

    make_separator($extname);
    print "#ifdef $extname\n";
    if (keys %$functions)
    {
	output_decls($functions, \&make_pfn_def);
	print "\n";
    }
    my $extvar = $extname;
    my $extvardef = $extname;
    $extvar =~ s/GL(X*)_/GL$1EW_/;
    if (keys %$functions)
    {
	print "static GLboolean _glewInit_$extname (void)\n{\n  GLboolean r = GL_FALSE;\n";
	output_decls($functions, \&make_pfn_def_init);
	print "\n  return r;\n}\n";
    }
    print "\nGLboolean $extvar = GL_FALSE;\n\n";
    print "#endif /* $extname */\n\n";
}