#!/bin/perl -w

# Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description:

# Generates the egl_stubs.h header file and the eglswitchu.def

# file from the libeglu def file.

# 

#

use strict;

my $COPYRIGHT = "" .

"// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).\n" .

"// All rights reserved.\n" .

"// This component and the accompanying materials are made available\n" .

"// under the terms of the License \"Eclipse Public License v1.0\"\n" .

"// which accompanies this distribution, and is available\n" .

"// at the URL \"http://www.eclipse.org/legal/epl-v10.html\".\n" .

"//\n" .

"// Initial Contributors:\n" .

"// Nokia Corporation - initial contribution.\n" .

"//\n" .

"// Contributors:\n" .

"//\n" .

"// Description:\n";

my $EGL_DEF;

my $EGLSWITCH_HEADER = "egl_stubs.h";

my $EGLSWITCH_DEF = "../BWINS/eglswitchu.def";

my $SOURCE_DEF_SIZE = 0;

&main();

exit(0);

sub main() {

	if (@ARGV == 0) {

		printf "Usage: generate_stubs.pl <EGL DEF file>\n";

		printf "e.g. generate_stubs.pl /epoc32/include/def/win32/libegl14u.def\n";

		return 0;

	}

	$EGL_DEF = $ARGV[0];

	my $maxOrdinal = 1;

	open DEF, $EGL_DEF or

		die "Cannot open $EGL_DEF\n";

	my ($dev, $ino, $mode, $nlink, $uid, $gid, 

		$rdev, $size, $atime, $mtime, $ctime, 

		$blksize, $blocks) 

		= stat($EGL_DEF);

	# the file size could be checked by the switcher build to verify that the stub is up to date.

    $SOURCE_DEF_SIZE= $size;

	open HEADER_OUT, ">${EGLSWITCH_HEADER}" or

		die "Cannot create $EGLSWITCH_HEADER\n";

	open DEF_OUT, ">${EGLSWITCH_DEF}" or

		die "Cannot create $EGLSWITCH_DEF\n";

	&printHeaderStart(\*HEADER_OUT);

	&printDefStart(\*DEF_OUT);

	while (<DEF>) {

		chomp;

		if (/@/) {

			if (s/.*;/;/) {

				&printDefEntry(\*DEF_OUT, $maxOrdinal, $_);

				&printHeaderEntry(\*HEADER_OUT,$maxOrdinal,$_);

			} else {

				&printDefEntry(\*DEF_OUT, $maxOrdinal, "");

				&printHeaderEntry(\*HEADER_OUT,$maxOrdinal, "(noname)");

			}

			$maxOrdinal++;

		}

	}

	&printHeaderEnd(\*HEADER_OUT,$maxOrdinal);

	&printDefEnd(\*DEF_OUT);

	close DEF;

	close HEADER_OUT;

	close DEF_OUT;

}

sub printDefStart(\$) {

	my ($fh) = @_;

	print $fh "EXPORTS\n";

}

sub printDefEntry(\$\$\$) {

	my ($fh, $ordinal, $comment) = @_;

	print $fh "\tcall_vector_${ordinal} @ ${ordinal} NONAME $comment\n";

}

sub printDefEnd(\$) {

	my ($fh) = @_;

	print $fh "\n";

}

sub printHeaderStart(\$) {

	my ($fh) = @_;

	print $fh "$COPYRIGHT\n".

    "// Generated from \"$EGL_DEF\" file size: $SOURCE_DEF_SIZE\n" .

		"\n" .

		"extern \"C\" {\n" .

		"void common_dispatch();\n" .

		"\n";

}

sub printHeaderEntry(\$\$\$) {

	my ($fh, $ordinal, $comment) = @_;

	print $fh "__declspec(dllexport)\n" .

		"__declspec(naked)\n" .

		"void call_vector_${ordinal} ()\n" .

		"\t{\n" .

		"\t// ${comment}\n" .

		"\t_asm mov eax, $ordinal\n" .

		"\t_asm jmp common_dispatch\n" .

		"\t}\n\n";

}

sub printHeaderEnd(\$\$) {

	my ($fh, $maxOrdinal) = @_;

	print $fh "}\n" .

		"#define MAX_ORDINAL $maxOrdinal\n\n";

}