# Copyright (c) 2008-2009 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:

#

use strict;

use FindBin;		# for FindBin::Bin

use Getopt::Long;

use Cwd;

my $PerlLibPath;    # fully qualified pathname of the directory containing our Perl modules

BEGIN {

# check user has a version of perl that will cope

	require 5.005_03;

# establish the path to the Perl libraries: currently the same directory as this script

	$PerlLibPath = $FindBin::Bin;	# X:/epoc32/tools

	if ($^O eq "MSWin32")

	{

		$PerlLibPath =~ s/\//\\/g;	# X:\epoc32\tools

		$PerlLibPath .= "\\";

	}	

}

use lib $PerlLibPath;

use Defutl;

my %opts = ();

my $result = GetOptions(\%opts,

						"path:s",

						"bldpath:s",

						"deffile:s",

						"linkAs:s",

						"import:s",

						"export:s",

						"absent:s",

						"inter",

						"sym_name_lkup"

						);

my $gPath = $opts{"path"}; # 0

my $gBldPath = $opts{"bldpath"}; # 0

my $compName = $opts{"import"}; # 1

my $gDefFile = $opts{"deffile"}; # 2

my $gDllName = $opts{"linkAs"};  # 3

my $gExpFile = $opts{"export"};

my $gLibFile = "$compName.lib" if $compName;

my $gSymbolNameLookup = $opts{"sym_name_lkup"};

my $oP = '--';

my $floatingpointmodel = "${oP}fpu softvfp";

my $interworkingp = $opts{"inter"};

my $interworking = "${oP}apcs /nointer";

$interworking = "${oP}apcs /inter" if ($interworkingp);

my @objectFiles;

&main;

my @DefDataStruct;

sub main ()

{

       unless($gDefFile)

       {

               usage();

       }

	my $FrzExportsOn=0;

	eval { &Def_ReadFileL(\@DefDataStruct, $gDefFile, $FrzExportsOn); };

	die $@ if $@;

    &parseDefFile(\@DefDataStruct, $opts{absent}, $gDefFile);

    &genExpFile($gPath, $gBldPath, $gExpFile) if $gExpFile;

    &genLibFile($gPath, $gBldPath, $gLibFile, $gDllName) if $gLibFile;

}

# Usage subroutine

sub usage( )

{

        print "\n";

        print "DEF2DLL -Creates binary objects used to implement the Symbian OS DLL model\n";

        print "\n";

        print "Usage: def2dll --deffile=<file> [--path=<dir>] [--bldpath=<dir>] [--import=<file>]  [--linkas=<file>] [--inter] [--export=<file>] [--sym_name_lkup]\n";

        print "\nOptions:\n";

	print "\t--deffile=<file>   	 	: def file to be converted\n";

        print "\t--path =<direcotry>		: destination path\n";

        print "\t--bldpath=<direcotry>		: build path for dll\n";

        print "\t--import=<file>			: import from file name\n";

        print "\t--linkas=<file>     		: linkas to file name specified\n";

        print "\t--inter                 	: enables interworking on ARM and THUMB\n";

        print "\t--export=<file>			: export to filename\n";

        print "\t--sym_name_lkup         	: symbol name ordinal number lookupç\n";

        print "\n";

        exit 1;

}

my %symbols = ();

my %symbolIndexMap = ();

my $exports = 0;

sub parseDefFile ($$$)

{

    my ($defStructRef, $AbsentSubst, $defFile) = @_;

	my $Ref;

	foreach $Ref (@$defStructRef) {

		next if (!$Ref);

		next if (!defined ($$Ref{Ordinal}));

		my $symbol = $$Ref{Name};

		my $index = $$Ref{Ordinal};

		my $rest = $$Ref{Comment};

		my $symbolType = 'CODE';

		if ($$Ref{Data} || ($symbol =~ /^(_ZTV|_ZTI|_ZTT)/)){

			$symbolType = 'DATA';

		}

		else {

			$exports = 1;

		}

		if ($symbols{$symbol} and !$$Ref{Absent}) {

			warn "DEF2DLL - WARNING: $symbol duplicated in $defFile\n";

		} else {

			if ($$Ref{Absent}) {

				$symbolIndexMap{$index} = $AbsentSubst;

			} else {

				$symbols{$symbol} = $symbolType;

				$symbolIndexMap{$index} = $symbol;

			}

		}

    }

}

sub genExpFile ($$$)

{

    my ($path, $bldpath, $expFile) = @_;

    my $numkeys = keys %symbolIndexMap;

    my $failed = 0;

    open EXPFILE, ">$path\\$expFile.s" or

		die "Error: can't create $path\\$expFile.s\n";

    print EXPFILE "\tEXPORT __DLL_Export_Table__\n\n";

    print EXPFILE "\tEXPORT |DLL\#\#ExportTable|\n\n";

    print EXPFILE "\tEXPORT |DLL\#\#ExportTableSize|\n\n";

    print EXPFILE "\tAREA ExportTable, CODE\n";

    print EXPFILE "__DLL_Export_Table__\n";

	if ($interworkingp) {

	  print EXPFILE "\tBX lr\n";

	} else {

	  print EXPFILE "\tMOV pc, lr\n";

	}

    print EXPFILE "|DLL\#\#ExportTableSize|\n";

    printf EXPFILE "\tDCD %d\n", $numkeys;

	if($gSymbolNameLookup) {

		print EXPFILE "\tDCD 0 \n";# This is the 0th ordinal for elftran to fill in.

	}

    print EXPFILE "|DLL\#\#ExportTable|\n";

    my @orderedSyms;

    my $maxIndex = 0;

    my $index;

    foreach $index (keys %symbolIndexMap) {

		$maxIndex = $index if $index > $maxIndex;

		$orderedSyms[$index] = $symbolIndexMap{$index};

    }

    print EXPFILE "\tPRESERVE8\n\n";

    my $n;

    for ($n = 1; $n <= $maxIndex ; $n++) {

		my $entry = $orderedSyms[$n];

		if ($entry) {

			print EXPFILE "\tIMPORT $entry\n";

			print EXPFILE "\tDCD $entry \t; @ $n\n";

		} else {

			warn "WARNING: missing entry at index $n\n";

			print EXPFILE "\tDCD 0 ; missing symbol\n";

		}

    }

    # create a .directive section

    print EXPFILE "\n\n\tAREA |.directive|, READONLY, NOALLOC\n";

    # Mark the section as armlink edit commands

    print EXPFILE "\tDCB  \"#<SYMEDIT>#\\n\"\n"; 

    # mark the imported symbol for 'dynamic' export

    print EXPFILE "\tDCB  \"EXPORT DLL##ExportTable\\n\"\n";

    print EXPFILE "\tDCB  \"EXPORT DLL##ExportTableSize\\n\"\n";

    print EXPFILE "\tEND";

    close EXPFILE;

    $failed = system "armasm $floatingpointmodel $interworking -o $path\\$expFile.exp $path\\$expFile.s";

    unlink ("$path\\$expFile.s") unless $failed;

    die "Error: cant create $path\\$expFile.exp\n" if $failed;

}

my %DataSymbols = ();

sub genVtblExportFile($$)

{

    my ($bldpath, $dllName) = @_;

    my $FileName = "VtblExports";

    open VTBLFILE, ">$bldpath\\$FileName.s" or

		die "Error: can't create $bldpath\\$FileName.s\n";

    print VTBLFILE "\tAREA |.directive|, NOALLOC, READONLY, ALIGN=2\n";

    printf VTBLFILE "\tDCB \"\#\<SYMEDIT\>\#\\n\"\n";

    my $symbol;

    foreach $symbol (sort keys %DataSymbols) {

		my $index = $DataSymbols{$symbol};

		$symbol =~ s/^"(.*)"$/$1/;	# remove enclosing quotes

		printf VTBLFILE "\tDCB \"IMPORT \#\<DLL\>$dllName\#\<\\\\DLL\>%x AS $symbol \\n\"\n", $index;

    }

#    printf VTBLFILE "\tDCB \"\#\<\\\\VTBLSYMS\>\#\\n\"\n";

    print VTBLFILE "\tEND";

    close VTBLFILE;

    my $failed = system "armasm $floatingpointmodel $interworking -o $bldpath\\$FileName.o $bldpath\\$FileName.s";

    unlink ("$bldpath\\$FileName.s");

    die "Error: cant create $bldpath\\$FileName.o\n" if $failed;

    push @objectFiles, "$bldpath\\$FileName.o";

}

sub genLibFile ($$$$)

{

    my ($path, $bldpath, $libFile, $dllName) = @_;

    my $tempFileName = "$bldpath\\$compName";

    my $viaFileName = sprintf("$bldpath\\_t%x_via_.txt", time);

    my $keyz = keys %symbolIndexMap;

    my $failed = 0;

    my $key;

    if ($keyz > 0) {

		open STUBGEN, "|$ENV{'EPOCROOT'}/epoc32/tools/genstubs" if $exports;

		foreach $key (sort keys %symbolIndexMap) {

			my $symbol = $symbolIndexMap{$key};

			my $stubFileName = "$tempFileName-$key";

			if ( $symbols{$symbol} eq 'DATA') {

				$DataSymbols{$symbol} = $key;

			} else {

				printf STUBGEN "$stubFileName.o $symbol #<DLL>$dllName#<\\DLL>%x\n", $key;

				push @objectFiles, "$stubFileName.o";

			}

		}

		genVtblExportFile($bldpath, $dllName);

    } else {

		# create dummy stub so armar creates a .lib for us

		open STUBGEN, "|$ENV{'EPOCROOT'}/epoc32/tools/genstubs";

		print STUBGEN "$tempFileName-stub.o $tempFileName##stub $dllName##dummy\n";

		push @objectFiles, "$tempFileName-stub.o";

    }

    close STUBGEN;

    open VIAFILE, ">$viaFileName" or

		die "Error: can't create VIA fie $viaFileName\n";

    print VIAFILE "${oP}create \"$path\\$libFile\"\n";

    my $objectFile;

    foreach $objectFile (@objectFiles) {

		print VIAFILE "\"$objectFile\"\n";

    }

    close VIAFILE;

    $failed = system( "armar ${oP}via $viaFileName");

    push @objectFiles, $viaFileName;

    unlink @objectFiles;

    die "Error: can't create $path\\$libFile\n" if $failed;

}

__END__