# Copyright (c) 2010 Symbian Foundation Ltd.

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of the License "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:

# Symbian Foundation - initial contribution.

#

# Contributors:

#

# Description: 

# This script filters an OBY file given a rom_content.csv and a static_dependencies.txt

use strict;

if (scalar @ARGV < 2)

	{

	die ("Must specify at least two arguments: rom_content.csv and static_dependencies.txt");

	}

my $rom_content_csv = shift @ARGV;

my $static_dependencies_txt = shift @ARGV;

open ROM_CONTENT, "<$rom_content_csv" or die("Cannot read $rom_content_csv: $!\n");

my @rom_content = <ROM_CONTENT>;

close ROM_CONTENT;

my $rom_content_header = shift @rom_content;

die("Not a valid rom_content.csv file") if ($rom_content_header !~ /^ROM file,/);

# read through the rom_content_csv looking for direct instructions

my %stem_substitutions;

my %deletions;

my %must_have;

foreach my $line (@rom_content)

	{

	my ($romfile,$hostfile,$ibyfile,$package,$cmd,@rest) = split /,/, $line;

	next if ($cmd eq "");

	$cmd = lc $cmd;

	if ($cmd eq "stem")

		{

		$stem_substitutions{$romfile} = $hostfile;

		next;

		}

	if ($cmd eq "out")

		{

		# print STDERR "Deletion request for >$romfile<\n";

		$deletions{$romfile} = "out";

		next;

		}

	if ($cmd eq "in")

		{

		$must_have{$romfile} = 1;

		next;

		}

	}

printf STDERR "%d stem, %d out, %d in\n", 

	scalar keys %stem_substitutions, 

	scalar keys %deletions, 

	scalar keys %must_have;

# read static dependencies file

my %exe_to_romfile;

my %lc_romfiles;

my $line;

open STATIC_DEPENDENCIES, "<$static_dependencies_txt" or die ("Cannot read $static_dependencies_txt: $!\n");

while ($line = <STATIC_DEPENDENCIES>)

	{

	chomp $line;

	my ($romfile, $hostfile, $stuff) = split /\t/, $line;

	$lc_romfiles{lc $romfile} = $romfile;

	if ($romfile =~ /^sys.bin.(.*)$/i)

		{

		my $exe = lc $1;

		$exe_to_romfile{$exe} = $romfile;

		}

	}

close STATIC_DEPENDENCIES;

my @obylines = <>;	# read the oby file

foreach my $line (@obylines)

	{

	if ($line =~ /^\s*alias\s+(\S+)\s+(\S+)\s*$/)

		{

		my $romfile = $1;

		my $newname = $2;

		$romfile =~ s/^\\sys/sys/;	# remove leading \, to match $romfile convention

		$romfile = $lc_romfiles{lc $romfile};

		$newname =~ s/^\\sys/sys/;	# remove leading \, to match $romfile convention

		$lc_romfiles{lc $newname} = $newname;

		if ($romfile =~ /^sys.bin.(\S+)$/i)

			{

			my $realexe = lc $1;

			push @{$exe_dependencies{$realexe}}, $newname;		# the alias is a dependent of the real file

			# print STDERR "added $newname as a dependent of $realexe\n"

			}

		}

	}

# foreach my $exe ("libopenvg.dll", "libopenvg_sw.dll")

# 	{

# 	printf STDERR "Dependents of %s = %s\n", $exe, join(", ", @{$exe_dependencies{$exe}});

# 	}

# process the "out" commands to recursively expand the deletions

sub delete_dependents($$$)

	{

	my ($romtrail,$original_reason,$listref) = @_;

	my ($romfile,$trail) = split /\t/, $romtrail;

	if (defined $deletions{$romfile})

		{

		# already marked for deletion

		if ($original_reason eq $romfile && $deletions{$romfile} ne $original_reason)

			{

			print STDERR "$romfile already deleted by removing $deletions{$romfile}\n";

			}

		return;

		}

	if (defined $must_have{$romfile})

		{

		# Problem! We won't be able to build this ROM

		print STDERR "$romfile is being kept, but will fail to link because of deletion trail $trail\n";

		# keep that file and see what happens anyway

		return;

		}

	# We should keep the following information, but it's rather verbose

	# printf STDERR "  %d - deleting %s (%s)\n", scalar @{$listref}, $romfile, $trail;

	$deletions{$romfile} = $original_reason;	# this ensures that it gets deleted

	if ($romfile =~ /^sys.bin.(.*)$/i)

		{

		my $exe = lc $1;

		if (!defined $exe_dependencies{$exe})

			{

			# print STDERR "No dependencies for $exe ($romfile)\n";

			return;

			}

		foreach my $dependent (@{$exe_dependencies{$exe}})

			{

			if (!defined $deletions{$dependent})

				{

		  	push @{$listref}, "$dependent\t$romfile $trail";

		  	}

			}

		}

	}

my @delete_cmds = sort keys %deletions;

foreach my $romfile (@delete_cmds)

	{

	delete $deletions{$romfile}; 	# so that delete_dependents will iterate properly

	my @delete_list = ("$romfile\tout");

	while (scalar @delete_list > 0)

		{

		my $next_victim = shift @delete_list;

		delete_dependents($next_victim, $romfile, \@delete_list);

		}

	}

# read the oby file and apply the commands

my $stem_count = 0;

my $deletion_count = 0;

foreach my $line (@obylines)

	{

	chomp $line;

	if ($line =~ /^(.*=)(\S+\s+)(\S+)(\s.*)?$/)

		{

		my $romcmd = $1;

		my $hostfile = $2;

		my $romfile = $3;

		my $rest = $4;

		$rest = "" if (!defined $rest);

		if ($romfile =~ /^"(.*)"$/)

			{

			$romfile = $1;

			$hostfile .= '"';

			$rest = '"'. $rest;

			}

		$lc_romfiles{lc $romfile} = $romfile;

		if ($deletions{$romfile})

			{

			$deletion_count++;

			next;

			}

		if (defined $stem_substitutions{$romfile})

			{

			# print STDERR "Applying stem_ prefix to $hostfile in $line\n";

			$hostfile =~ s/(\/|\\)([^\\\/]+)$/$1stem_$2/;

			$stem_count++;

			}

		print $romcmd, $hostfile, $romfile, $rest, "\n";

		next;

		}

	# __ECOM_PLUGIN(emulator directory, file rom dir, dataz_, resource rom dir, filename, resource filename)

	if ($line =~ /__ECOM_PLUGIN\(([^)]+)\)/)

		{

		my ($emudir, $romdir, $dataz, $resourcedir, $exename, $rscname) = split /\s*,\s*/, $1;

		my $romfile = $romdir. "\\". $exename;

		if ($deletions{$romfile})

			{

			# print STDERR "Deleted __ECOM_PLUGIN for $romfile\n";

			$deletion_count++;

			next;

			}		

		}

	if ($line =~ /^\s*alias\s+(\S+)\s+(\S+)\s*$/)

		{

		my $romfile = $1;

		my $newname = $2;

		$romfile =~ s/^\\sys/sys/;	# remove leading \, to match $romfile convention

		$romfile = $lc_romfiles{lc $romfile};

		if ($deletions{$romfile})

			{

			# delete the alias if the real file is marked for deletion

			$deletion_count++;

			next;

			}

		else

			{

			# print STDERR "$romfile is not deleted - saving $line\n";

			}

		}

	# patchdata  sys\bin\eiksrv.dll addr 0x0000c944 4 5

	if ($line =~ /^\s*patchdata\s*(\S+)/)

		{

		my $romfile = $1;

		$romfile =~ s/^\\//;	# remove leading \, to match $romfile convention

		$romfile = $lc_romfiles{lc $romfile};

		# print STDERR "deleting patchdata line for $romfile\n";

		if ($deletions{$romfile})

			{

			# don't count these lines as deletions - they are just extra lines relating to deleted files.

			next;

			}

		}

	print $line,"\n";

	}

print STDERR "Applied $stem_count stem substitutions and deleted $deletion_count rom files\n";