#!/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";

 }