1 files changed, 2699 insertions, 0 deletions
diff --git a/3rdParty/LCov/lcov b/3rdParty/LCov/lcov
new file mode 100755
index 0000000..6304d75
--- /dev/null
+++ b/3rdParty/LCov/lcov
@@ -0,0 +1,2699 @@
+#!/usr/bin/perl -w
+#
+#   Copyright (c) International Business Machines  Corp., 2002,2007
+#
+#   This program is free software;  you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or (at
+#   your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY;  without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#   General Public License for more details.                 
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program;  if not, write to the Free Software
+#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+#
+# lcov
+#
+#   This is a wrapper script which provides a single interface for accessing
+#   LCOV coverage data.
+#
+#
+# History:
+#   2002-08-29 created by Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>
+#                         IBM Lab Boeblingen
+#   2002-09-05 / Peter Oberparleiter: implemented --kernel-directory +
+#                multiple directories
+#   2002-10-16 / Peter Oberparleiter: implemented --add-tracefile option
+#   2002-10-17 / Peter Oberparleiter: implemented --extract option
+#   2002-11-04 / Peter Oberparleiter: implemented --list option
+#   2003-03-07 / Paul Larson: Changed to make it work with the latest gcov 
+#                kernel patch.  This will break it with older gcov-kernel
+#                patches unless you change the value of $gcovmod in this script
+#   2003-04-07 / Peter Oberparleiter: fixed bug which resulted in an error
+#                when trying to combine .info files containing data without
+#                a test name
+#   2003-04-10 / Peter Oberparleiter: extended Paul's change so that LCOV
+#                works both with the new and the old gcov-kernel patch
+#   2003-04-10 / Peter Oberparleiter: added $gcov_dir constant in anticipation
+#                of a possible move of the gcov kernel directory to another
+#                file system in a future version of the gcov-kernel patch
+#   2003-04-15 / Paul Larson: make info write to STDERR, not STDOUT
+#   2003-04-15 / Paul Larson: added --remove option
+#   2003-04-30 / Peter Oberparleiter: renamed --reset to --zerocounters
+#                to remove naming ambiguity with --remove
+#   2003-04-30 / Peter Oberparleiter: adjusted help text to include --remove
+#   2003-06-27 / Peter Oberparleiter: implemented --diff
+#   2003-07-03 / Peter Oberparleiter: added line checksum support, added
+#                --no-checksum
+#   2003-12-11 / Laurent Deniel: added --follow option
+#   2004-03-29 / Peter Oberparleiter: modified --diff option to better cope with
+#                ambiguous patch file entries, modified --capture option to use
+#                modprobe before insmod (needed for 2.6)
+#   2004-03-30 / Peter Oberparleiter: added --path option
+#   2004-08-09 / Peter Oberparleiter: added configuration file support
+#   2008-08-13 / Peter Oberparleiter: added function coverage support
+#
+
+use strict;
+use File::Basename; 
+use Getopt::Long;
+
+
+# Global constants
+our $lcov_version	= "LCOV version 1.7";
+our $lcov_url		= "http://ltp.sourceforge.net/coverage/lcov.php";
+our $tool_name		= basename($0);
+
+# Names of the GCOV kernel module
+our @gcovmod = ("gcov-prof", "gcov-proc");
+
+# Directory containing gcov kernel files
+our $gcov_dir = "/proc/gcov";
+
+# The location of the insmod tool
+our $insmod_tool	= "/sbin/insmod";
+
+# The location of the modprobe tool
+our $modprobe_tool	= "/sbin/modprobe";
+
+# The location of the rmmod tool
+our $rmmod_tool		= "/sbin/rmmod";
+
+# Where to create temporary directories
+our $tmp_dir		= "/tmp";
+
+# How to prefix a temporary directory name
+our $tmp_prefix		= "tmpdir";
+
+
+# Prototypes
+sub print_usage(*);
+sub check_options();
+sub userspace_reset();
+sub userspace_capture();
+sub kernel_reset();
+sub kernel_capture();
+sub add_traces();
+sub read_info_file($);
+sub get_info_entry($);
+sub set_info_entry($$$$$$$;$$$$);
+sub add_counts($$);
+sub merge_checksums($$$);
+sub combine_info_entries($$$);
+sub combine_info_files($$);
+sub write_info_file(*$);
+sub extract();
+sub remove();
+sub list();
+sub get_common_filename($$);
+sub read_diff($);
+sub diff();
+sub system_no_output($@);
+sub read_config($);
+sub apply_config($);
+sub info(@);
+sub unload_module($);
+sub check_and_load_kernel_module();
+sub create_temp_dir();
+sub transform_pattern($);
+sub warn_handler($);
+sub die_handler($);
+
+
+# Global variables & initialization
+our @directory;		# Specifies where to get coverage data from
+our @kernel_directory;	# If set, captures only from specified kernel subdirs
+our @add_tracefile;	# If set, reads in and combines all files in list
+our $list;		# If set, list contents of tracefile
+our $extract;		# If set, extracts parts of tracefile
+our $remove;		# If set, removes parts of tracefile
+our $diff;		# If set, modifies tracefile according to diff
+our $reset;		# If set, reset all coverage data to zero
+our $capture;		# If set, capture data
+our $output_filename;	# Name for file to write coverage data to
+our $test_name = "";	# Test case name
+our $quiet = "";	# If set, suppress information messages
+our $help;		# Help option flag
+our $version;		# Version option flag
+our $convert_filenames;	# If set, convert filenames when applying diff
+our $strip;		# If set, strip leading directories when applying diff
+our $need_unload;	# If set, unload gcov kernel module
+our $temp_dir_name;	# Name of temporary directory
+our $cwd = `pwd`;	# Current working directory
+our $to_file;		# If set, indicates that output is written to a file
+our $follow;		# If set, indicates that find shall follow links
+our $diff_path = "";	# Path removed from tracefile when applying diff
+our $base_directory;	# Base directory (cwd of gcc during compilation)
+our $checksum;		# If set, calculate a checksum for each line
+our $no_checksum;	# If set, don't calculate a checksum for each line
+our $compat_libtool;	# If set, indicates that libtool mode is to be enabled
+our $no_compat_libtool;	# If set, indicates that libtool mode is to be disabled
+our $gcov_tool;
+our $ignore_errors;
+our $initial;
+our $no_recursion = 0;
+our $maxdepth;
+our $config;		# Configuration file contents
+chomp($cwd);
+our $tool_dir = dirname($0);	# Directory where genhtml tool is installed
+
+
+#
+# Code entry point
+#
+
+$SIG{__WARN__} = \&warn_handler;
+$SIG{__DIE__} = \&die_handler;
+
+# Add current working directory if $tool_dir is not already an absolute path
+if (! ($tool_dir =~ /^\/(.*)$/))
+{
+	$tool_dir = "$cwd/$tool_dir";
+}
+
+# Read configuration file if available
+if (-r $ENV{"HOME"}."/.lcovrc")
+{
+	$config = read_config($ENV{"HOME"}."/.lcovrc");
+}
+elsif (-r "/etc/lcovrc")
+{
+	$config = read_config("/etc/lcovrc");
+}
+
+if ($config)
+{
+	# Copy configuration file values to variables
+	apply_config({
+		"lcov_gcov_dir"		=> \$gcov_dir,
+		"lcov_insmod_tool"	=> \$insmod_tool,
+		"lcov_modprobe_tool"	=> \$modprobe_tool,
+		"lcov_rmmod_tool"	=> \$rmmod_tool,
+		"lcov_tmp_dir"		=> \$tmp_dir});
+}
+
+# Parse command line options
+if (!GetOptions("directory|d|di=s" => \@directory,
+		"add-tracefile=s" => \@add_tracefile,
+		"list=s" => \$list,
+		"kernel-directory=s" => \@kernel_directory,
+		"extract=s" => \$extract,
+		"remove=s" => \$remove,
+		"diff=s" => \$diff,
+		"convert-filenames" => \$convert_filenames,
+		"strip=i" => \$strip,
+		"capture|c" => \$capture,
+		"output-file=s" => \$output_filename,
+		"test-name=s" => \$test_name,
+		"zerocounters" => \$reset,
+		"quiet" => \$quiet,
+		"help|?" => \$help,
+		"version" => \$version,
+		"follow" => \$follow,
+		"path=s" => \$diff_path,
+		"base-directory=s" => \$base_directory,
+		"checksum" => \$checksum,
+		"no-checksum" => \$no_checksum,
+		"compat-libtool" => \$compat_libtool,
+		"no-compat-libtool" => \$no_compat_libtool,
+		"gcov-tool=s" => \$gcov_tool,
+		"ignore-errors=s" => \$ignore_errors,
+		"initial|i" => \$initial,
+		"no-recursion" => \$no_recursion
+		))
+{
+	print(STDERR "Use $tool_name --help to get usage information\n");
+	exit(1);
+}
+else
+{
+	# Merge options
+	if (defined($no_checksum))
+	{
+		$checksum = ($no_checksum ? 0 : 1);
+		$no_checksum = undef;
+	}
+
+	if (defined($no_compat_libtool))
+	{
+		$compat_libtool = ($no_compat_libtool ? 0 : 1);
+		$no_compat_libtool = undef;
+	}
+}
+
+# Check for help option
+if ($help)
+{
+	print_usage(*STDOUT);
+	exit(0);
+}
+
+# Check for version option
+if ($version)
+{
+	print("$tool_name: $lcov_version\n");
+	exit(0);
+}
+
+# Normalize --path text
+$diff_path =~ s/\/$//;
+
+if ($follow)
+{
+	$follow = "-follow";
+}
+else
+{
+	$follow = "";
+}
+
+if ($no_recursion)
+{
+	$maxdepth = "-maxdepth 1";
+}
+else
+{
+	$maxdepth = "";
+}
+
+# Check for valid options
+check_options();
+
+# Only --extract, --remove and --diff allow unnamed parameters
+if (@ARGV && !($extract || $remove || $diff))
+{
+	die("Extra parameter found\n".
+	    "Use $tool_name --help to get usage information\n");
+}
+
+# Check for output filename
+$to_file = ($output_filename && ($output_filename ne "-"));
+
+if ($capture)
+{
+	if (!$to_file)
+	{
+		# Option that tells geninfo to write to stdout
+		$output_filename = "-";
+	}
+}
+else
+{
+	if ($initial)
+	{
+		die("Option --initial is only valid when capturing data (-c)\n".
+		    "Use $tool_name --help to get usage information\n");
+	}
+}
+
+# Check for requested functionality
+if ($reset)
+{
+	# Differentiate between user space and kernel reset
+	if (@directory)
+	{
+		userspace_reset();
+	}
+	else
+	{
+		kernel_reset();
+	}
+}
+elsif ($capture)
+{
+	# Differentiate between user space and kernel 
+	if (@directory)
+	{
+		userspace_capture();
+	}
+	else
+	{
+		kernel_capture();
+	}
+}
+elsif (@add_tracefile)
+{
+	add_traces();
+}
+elsif ($remove)
+{
+	remove();
+}
+elsif ($extract)
+{
+	extract();
+}
+elsif ($list)
+{
+	list();
+}
+elsif ($diff)
+{
+	if (scalar(@ARGV) != 1)
+	{
+		die("ERROR: option --diff requires one additional argument!\n".
+		    "Use $tool_name --help to get usage information\n");
+	}
+	diff();
+}
+
+info("Done.\n");
+exit(0);
+
+#
+# print_usage(handle)
+#
+# Print usage information.
+#
+
+sub print_usage(*)
+{
+	local *HANDLE = $_[0];
+
+	print(HANDLE <<END_OF_USAGE);
+Usage: $tool_name [OPTIONS]
+
+Use lcov to collect coverage data from either the currently running Linux
+kernel or from a user space application. Specify the --directory option to
+get coverage data for a user space program.
+
+Misc:
+  -h, --help                      Print this help, then exit
+  -v, --version                   Print version number, then exit
+  -q, --quiet                     Do not print progress messages
+
+Operation:
+  -z, --zerocounters              Reset all execution counts to zero
+  -c, --capture                   Capture coverage data
+  -a, --add-tracefile FILE        Add contents of tracefiles
+  -e, --extract FILE PATTERN      Extract files matching PATTERN from FILE
+  -r, --remove FILE PATTERN       Remove files matching PATTERN from FILE
+  -l, --list FILE                 List contents of tracefile FILE
+      --diff FILE DIFF            Transform tracefile FILE according to DIFF
+
+Options:
+  -i, --initial                   Capture initial zero coverage data
+  -t, --test-name NAME            Specify test name to be stored with data
+  -o, --output-file FILENAME      Write data to FILENAME instead of stdout
+  -d, --directory DIR             Use .da files in DIR instead of kernel
+  -f, --follow                    Follow links when searching .da files
+  -k, --kernel-directory KDIR     Capture kernel coverage data only from KDIR
+  -b, --base-directory DIR        Use DIR as base directory for relative paths
+      --convert-filenames         Convert filenames when applying diff
+      --strip DEPTH               Strip initial DEPTH directory levels in diff
+      --path PATH                 Strip PATH from tracefile when applying diff
+      --(no-)checksum             Enable (disable) line checksumming
+      --(no-)compat-libtool       Enable (disable) libtool compatibility mode
+      --gcov-tool TOOL            Specify gcov tool location
+      --ignore-errors ERRORS      Continue after ERRORS (gcov, source)
+      --no-recursion              Exlude subdirectories from processing
+
+For more information see: $lcov_url
+END_OF_USAGE
+	;
+}
+
+
+#
+# check_options()
+#
+# Check for valid combination of command line options. Die on error.
+#
+
+sub check_options()
+{
+	my $i = 0;
+
+	# Count occurrence of mutually exclusive options
+	$reset && $i++;
+	$capture && $i++;
+	@add_tracefile && $i++;
+	$extract && $i++;
+	$remove && $i++;
+	$list && $i++;
+	$diff && $i++;
+	
+	if ($i == 0)
+	{
+		die("Need one of the options -z, -c, -a, -e, -r, -l or ".
+		    "--diff\n".
+		    "Use $tool_name --help to get usage information\n");
+	}
+	elsif ($i > 1)
+	{
+		die("ERROR: only one of -z, -c, -a, -e, -r, -l or ".
+		    "--diff allowed!\n".
+		    "Use $tool_name --help to get usage information\n");
+	}
+}
+
+
+#
+# userspace_reset()
+#
+# Reset coverage data found in DIRECTORY by deleting all contained .da files.
+#
+# Die on error.
+#
+
+sub userspace_reset()
+{
+	my $current_dir;
+	my @file_list;
+
+	foreach $current_dir (@directory)
+	{
+		info("Deleting all .da files in $current_dir".
+		     ($no_recursion?"\n":" and subdirectories\n"));
+		@file_list = `find "$current_dir" $maxdepth $follow -name \\*\\.da -o -name \\*\\.gcda -type f 2>/dev/null`;
+		chomp(@file_list);
+		foreach (@file_list)
+		{
+			unlink($_) or die("ERROR: cannot remove file $_!\n");
+		}
+	}
+}
+
+
+#
+# userspace_capture()
+#
+# Capture coverage data found in DIRECTORY and write it to OUTPUT_FILENAME
+# if specified, otherwise to STDOUT.
+#
+# Die on error.
+#
+
+sub userspace_capture()
+{
+	my @param;
+	my $file_list = join(" ", @directory);
+
+	info("Capturing coverage data from $file_list\n");
+	@param = ("$tool_dir/geninfo", @directory);
+	if ($output_filename)
+	{
+		@param = (@param, "--output-filename", $output_filename);
+	}
+	if ($test_name)
+	{
+		@param = (@param, "--test-name", $test_name);
+	}
+	if ($follow)
+	{
+		@param = (@param, "--follow");
+	}
+	if ($quiet)
+	{
+		@param = (@param, "--quiet");
+	}
+	if (defined($checksum))
+	{
+		if ($checksum)
+		{
+			@param = (@param, "--checksum");
+		}
+		else
+		{
+			@param = (@param, "--no-checksum");
+		}
+	}
+	if ($base_directory)
+	{
+		@param = (@param, "--base-directory", $base_directory);
+	}
+	if ($no_compat_libtool)
+	{
+		@param = (@param, "--no-compat-libtool");
+	}
+	elsif ($compat_libtool)
+	{
+		@param = (@param, "--compat-libtool");
+	}
+	if ($gcov_tool)
+	{
+		@param = (@param, "--gcov-tool", $gcov_tool);
+	}
+	if ($ignore_errors)
+	{
+		@param = (@param, "--ignore-errors", $ignore_errors);
+	}
+	if ($initial)
+	{
+		@param = (@param, "--initial");
+	}
+	if ($no_recursion)
+	{
+		@param = (@param, "--no-recursion");
+	}
+
+	system(@param);
+	exit($? >> 8);
+}
+
+
+#
+# kernel_reset()
+#
+# Reset kernel coverage.
+#
+# Die on error.
+#
+
+sub kernel_reset()
+{
+	local *HANDLE;
+	check_and_load_kernel_module();
+
+	info("Resetting kernel execution counters\n");
+	open(HANDLE, ">$gcov_dir/vmlinux") or
+		die("ERROR: cannot write to $gcov_dir/vmlinux!\n");
+	print(HANDLE "0");
+	close(HANDLE);
+
+	# Unload module if we loaded it in the first place
+	if ($need_unload)
+	{
+		unload_module($need_unload);
+	}
+}
+
+
+#
+# kernel_capture()
+#
+# Capture kernel coverage data and write it to OUTPUT_FILENAME if specified,
+# otherwise stdout.
+#
+
+sub kernel_capture()
+{
+	my @param;
+
+	check_and_load_kernel_module();
+
+	# Make sure the temporary directory is removed upon script termination
+	END
+	{
+		if ($temp_dir_name)
+		{
+			stat($temp_dir_name);
+			if (-r _)
+			{
+				info("Removing temporary directory ".
+				     "$temp_dir_name\n");
+
+				# Remove temporary directory
+				system("rm", "-rf", $temp_dir_name)
+					and warn("WARNING: cannot remove ".
+						 "temporary directory ".
+						 "$temp_dir_name!\n");
+			}
+		}
+	}
+
+	# Get temporary directory
+	$temp_dir_name = create_temp_dir();
+
+	info("Copying kernel data to temporary directory $temp_dir_name\n");
+
+	if (!@kernel_directory)
+	{
+		# Copy files from gcov kernel directory
+		system("cp", "-dr", $gcov_dir, $temp_dir_name)
+			and die("ERROR: cannot copy files from $gcov_dir!\n");
+	}
+	else
+	{
+		# Prefix list of kernel sub-directories with the gcov kernel
+		# directory
+		@kernel_directory = map("$gcov_dir/$_", @kernel_directory);
+
+		# Copy files from gcov kernel directory
+		system("cp", "-dr", @kernel_directory, $temp_dir_name)
+			and die("ERROR: cannot copy files from ".
+				join(" ", @kernel_directory)."!\n");
+	}
+
+	# Make directories writable
+	system("find", $temp_dir_name, "-type", "d", "-exec", "chmod", "u+w",
+	       "{}", ";")
+		and die("ERROR: cannot modify access rights for ".
+			"$temp_dir_name!\n");
+
+	# Make files writable
+	system("find", $temp_dir_name, "-type", "f", "-exec", "chmod", "u+w",
+	       "{}", ";")
+		and die("ERROR: cannot modify access rights for ".
+			"$temp_dir_name!\n");
+
+	# Capture data
+	info("Capturing coverage data from $temp_dir_name\n");
+	@param = ("$tool_dir/geninfo", $temp_dir_name);
+	if ($output_filename)
+	{
+		@param = (@param, "--output-filename", $output_filename);
+	}
+	if ($test_name)
+	{
+		@param = (@param, "--test-name", $test_name);
+	}
+	if ($follow)
+	{
+		@param = (@param, "--follow");
+	}
+	if ($quiet)
+	{
+		@param = (@param, "--quiet");
+	}
+	if (defined($checksum))
+	{
+		if ($checksum)
+		{
+			@param = (@param, "--checksum");
+		}
+		else
+		{
+			@param = (@param, "--no-checksum");
+		}
+	}
+	if ($base_directory)
+	{
+		@param = (@param, "--base-directory", $base_directory);
+	}
+	if ($no_compat_libtool)
+	{
+		@param = (@param, "--no-compat-libtool");
+	}
+	elsif ($compat_libtool)
+	{
+		@param = (@param, "--compat-libtool");
+	}
+	if ($gcov_tool)
+	{
+		@param = (@param, "--gcov-tool", $gcov_tool);
+	}
+	if ($ignore_errors)
+	{
+		@param = (@param, "--ignore-errors", $ignore_errors);
+	}
+	if ($initial)
+	{
+		@param = (@param, "--initial");
+	}
+	system(@param) and exit($? >> 8);
+
+
+	# Unload module if we loaded it in the first place
+	if ($need_unload)
+	{
+		unload_module($need_unload);
+	}
+}
+
+
+#
+# info(printf_parameter)
+#
+# Use printf to write PRINTF_PARAMETER to stdout only when the $quiet flag
+# is not set.
+#
+
+sub info(@)
+{
+	if (!$quiet)
+	{
+		# Print info string
+		if ($to_file)
+		{
+			print(@_)
+		}
+		else
+		{
+			# Don't interfer with the .info output to STDOUT
+			printf(STDERR @_);
+		}
+	}
+}
+
+
+#
+# Check if the gcov kernel module is loaded. If it is, exit, if not, try
+# to load it.
+#
+# Die on error.
+#
+
+sub check_and_load_kernel_module()
+{
+	my $module_name;
+
+	# Is it loaded already?
+	stat("$gcov_dir");
+	if (-r _) { return(); }
+
+	info("Loading required gcov kernel module.\n");
+
+	# Do we have access to the insmod tool?
+	stat($insmod_tool);
+	if (!-x _)
+	{
+		die("ERROR: need insmod tool ($insmod_tool) to access kernel ".
+		    "coverage data!\n");
+	}
+	# Do we have access to the modprobe tool?
+	stat($modprobe_tool);
+	if (!-x _)
+	{
+		die("ERROR: need modprobe tool ($modprobe_tool) to access ".
+		    "kernel coverage data!\n");
+	}
+
+	# Try some possibilities of where the gcov kernel module may be found
+	foreach $module_name (@gcovmod)
+	{
+		# Try to load module from system wide module directory
+		# /lib/modules
+		if (system_no_output(3, $modprobe_tool, $module_name) == 0)
+		{
+			# Succeeded
+			$need_unload = $module_name;
+			return();
+		}
+
+		# Try to load linux 2.5/2.6 module from tool directory
+		if (system_no_output(3, $insmod_tool,
+				      "$tool_dir/$module_name.ko") == 0)
+		{
+			# Succeeded
+			$need_unload = $module_name;
+			return();
+		}
+
+		# Try to load linux 2.4 module from tool directory
+		if (system_no_output(3, $insmod_tool,
+				     "$tool_dir/$module_name.o") == 0)
+		{
+			# Succeeded
+			$need_unload = $module_name;
+			return();
+		}
+	}
+
+	# Hm, loading failed - maybe we aren't root?
+	if ($> != 0)
+	{
+		die("ERROR: need root access to load kernel module!\n");
+	}
+
+	die("ERROR: cannot load required gcov kernel module!\n");
+}
+
+
+#
+# unload_module()
+#
+# Unload the gcov kernel module.
+#
+
+sub unload_module($)
+{
+	my $module = $_[0];
+
+	info("Unloading kernel module $module\n");
+
+	# Do we have access to the rmmod tool?
+	stat($rmmod_tool);
+	if (!-x _)
+	{
+		warn("WARNING: cannot execute rmmod tool at $rmmod_tool - ".
+		     "gcov module still loaded!\n");
+	}
+
+	# Unload gcov kernel module
+	system_no_output(1, $rmmod_tool, $module)
+		and warn("WARNING: cannot unload gcov kernel module ".
+		         "$module!\n");
+}
+
+
+#
+# create_temp_dir()
+#
+# Create a temporary directory and return its path.
+#
+# Die on error.
+#
+
+sub create_temp_dir()
+{
+	my $dirname;
+	my $number = sprintf("%d", rand(1000));
+
+	# Endless loops are evil
+	while ($number++ < 1000)
+	{
+		$dirname = "$tmp_dir/$tmp_prefix$number";
+		stat($dirname);
+		if (-e _) { next; }
+
+		mkdir($dirname)
+			or die("ERROR: cannot create temporary directory ".
+			       "$dirname!\n");
+
+		return($dirname);
+	}
+
+	die("ERROR: cannot create temporary directory in $tmp_dir!\n");
+}
+
+
+#
+# read_info_file(info_filename)
+#
+# Read in the contents of the .info file specified by INFO_FILENAME. Data will
+# be returned as a reference to a hash containing the following mappings:
+#
+# %result: for each filename found in file -> \%data
+#
+# %data: "test"  -> \%testdata
+#        "sum"   -> \%sumcount
+#        "func"  -> \%funcdata
+#        "found" -> $lines_found (number of instrumented lines found in file)
+#	 "hit"   -> $lines_hit (number of executed lines in file)
+#        "check" -> \%checkdata
+#        "testfnc" -> \%testfncdata
+#        "sumfnc"  -> \%sumfnccount
+#
+# %testdata   : name of test affecting this file -> \%testcount
+# %testfncdata: name of test affecting this file -> \%testfnccount
+#
+# %testcount   : line number   -> execution count for a single test
+# %testfnccount: function name -> execution count for a single test
+# %sumcount    : line number   -> execution count for all tests
+# %sumfnccount : function name -> execution count for all tests
+# %funcdata    : function name -> line number
+# %checkdata   : line number   -> checksum of source code line
+# 
+# Note that .info file sections referring to the same file and test name
+# will automatically be combined by adding all execution counts.
+#
+# Note that if INFO_FILENAME ends with ".gz", it is assumed that the file
+# is compressed using GZIP. If available, GUNZIP will be used to decompress
+# this file.
+#
+# Die on error.
+#
+
+sub read_info_file($)
+{
+	my $tracefile = $_[0];		# Name of tracefile
+	my %result;			# Resulting hash: file -> data
+	my $data;			# Data handle for current entry
+	my $testdata;			#       "             "
+	my $testcount;			#       "             "
+	my $sumcount;			#       "             "
+	my $funcdata;			#       "             "
+	my $checkdata;			#       "             "
+	my $testfncdata;
+	my $testfnccount;
+	my $sumfnccount;
+	my $line;			# Current line read from .info file
+	my $testname;			# Current test name
+	my $filename;			# Current filename
+	my $hitcount;			# Count for lines hit
+	my $count;			# Execution count of current line
+	my $negative;			# If set, warn about negative counts
+	my $changed_testname;		# If set, warn about changed testname
+	my $line_checksum;		# Checksum of current line
+	local *INFO_HANDLE;		# Filehandle for .info file
+
+	info("Reading tracefile $tracefile\n");
+
+	# Check if file exists and is readable
+	stat($_[0]);
+	if (!(-r _))
+	{
+		die("ERROR: cannot read file $_[0]!\n");
+	}
+
+	# Check if this is really a plain file
+	if (!(-f _))
+	{
+		die("ERROR: not a plain file: $_[0]!\n");
+	}
+
+	# Check for .gz extension
+	if ($_[0] =~ /\.gz$/)
+	{
+		# Check for availability of GZIP tool
+		system_no_output(1, "gunzip" ,"-h")
+			and die("ERROR: gunzip command not available!\n");
+
+		# Check integrity of compressed file
+		system_no_output(1, "gunzip", "-t", $_[0])
+			and die("ERROR: integrity check failed for ".
+				"compressed file $_[0]!\n");
+
+		# Open compressed file
+		open(INFO_HANDLE, "gunzip -c $_[0]|")
+			or die("ERROR: cannot start gunzip to decompress ".
+			       "file $_[0]!\n");
+	}
+	else
+	{
+		# Open decompressed file
+		open(INFO_HANDLE, $_[0])
+			or die("ERROR: cannot read file $_[0]!\n");
+	}
+
+	$testname = "";
+	while (<INFO_HANDLE>)
+	{
+		chomp($_);
+		$line = $_;
+
+		# Switch statement
+		foreach ($line)
+		{
+			/^TN:([^,]*)/ && do
+			{
+				# Test name information found
+				$testname = defined($1) ? $1 : "";
+				if ($testname =~ s/\W/_/g)
+				{
+					$changed_testname = 1;
+				}
+				last;
+			};
+
+			/^[SK]F:(.*)/ && do
+			{
+				# Filename information found
+				# Retrieve data for new entry
+				$filename = $1;
+
+				$data = $result{$filename};
+				($testdata, $sumcount, $funcdata, $checkdata,
+				 $testfncdata, $sumfnccount) =
+					get_info_entry($data);
+
+				if (defined($testname))
+				{
+					$testcount = $testdata->{$testname};
+					$testfnccount = $testfncdata->{$testname};
+				}
+				else
+				{
+					$testcount = {};
+					$testfnccount = {};
+				}
+				last;
+			};
+
+			/^DA:(\d+),(-?\d+)(,[^,\s]+)?/ && do
+			{
+				# Fix negative counts
+				$count = $2 < 0 ? 0 : $2;
+				if ($2 < 0)
+				{
+					$negative = 1;
+				}
+				# Execution count found, add to structure
+				# Add summary counts
+				$sumcount->{$1} += $count;
+
+				# Add test-specific counts
+				if (defined($testname))
+				{
+					$testcount->{$1} += $count;
+				}
+
+				# Store line checksum if available
+				if (defined($3))
+				{
+					$line_checksum = substr($3, 1);
+
+					# Does it match a previous definition
+					if (defined($checkdata->{$1}) &&
+					    ($checkdata->{$1} ne
+					     $line_checksum))
+					{
+						die("ERROR: checksum mismatch ".
+						    "at $filename:$1\n");
+					}
+
+					$checkdata->{$1} = $line_checksum;
+				}
+				last;
+			};
+
+			/^FN:(\d+),([^,]+)/ && do
+			{
+				# Function data found, add to structure
+				$funcdata->{$2} = $1;
+
+				# Also initialize function call data
+				if (!defined($sumfnccount->{$2})) {
+					$sumfnccount->{$2} = 0;
+				}
+				if (defined($testname))
+				{
+					if (!defined($testfnccount->{$2})) {
+						$testfnccount->{$2} = 0;
+					}
+				}
+				last;
+			};
+
+			/^FNDA:(\d+),([^,]+)/ && do
+			{
+				# Function call count found, add to structure
+				# Add summary counts
+				$sumfnccount->{$2} += $1;
+
+				# Add test-specific counts
+				if (defined($testname))
+				{
+					$testfnccount->{$2} += $1;
+				}
+				last;
+			};
+			/^end_of_record/ && do
+			{
+				# Found end of section marker
+				if ($filename)
+				{
+					# Store current section data
+					if (defined($testname))
+					{
+						$testdata->{$testname} =
+							$testcount;
+						$testfncdata->{$testname} =
+							$testfnccount;
+					}	
+
+					set_info_entry($data, $testdata,
+						       $sumcount, $funcdata,
+						       $checkdata, $testfncdata,
+						       $sumfnccount);
+					$result{$filename} = $data;
+					last;
+				}
+			};
+
+			# default
+			last;
+		}
+	}
+	close(INFO_HANDLE);
+
+	# Calculate hit and found values for lines and functions of each file
+	foreach $filename (keys(%result))
+	{
+		$data = $result{$filename};
+
+		($testdata, $sumcount, undef, undef, $testfncdata,
+		 $sumfnccount) = get_info_entry($data);
+
+		# Filter out empty files
+		if (scalar(keys(%{$sumcount})) == 0)
+		{
+			delete($result{$filename});
+			next;
+		}
+		# Filter out empty test cases
+		foreach $testname (keys(%{$testdata}))
+		{
+			if (!defined($testdata->{$testname}) ||
+			    scalar(keys(%{$testdata->{$testname}})) == 0)
+			{
+				delete($testdata->{$testname});
+				delete($testfncdata->{$testname});
+			}
+		}
+
+		$data->{"found"} = scalar(keys(%{$sumcount}));
+		$hitcount = 0;
+
+		foreach (keys(%{$sumcount}))
+		{
+			if ($sumcount->{$_} > 0) { $hitcount++; }
+		}
+
+		$data->{"hit"} = $hitcount;
+
+		# Get found/hit values for function call data
+		$data->{"f_found"} = scalar(keys(%{$sumfnccount}));
+		$hitcount = 0;
+
+		foreach (keys(%{$sumfnccount})) {
+			if ($sumfnccount->{$_} > 0) {
+				$hitcount++;
+			}
+		}
+		$data->{"f_hit"} = $hitcount;
+	}
+
+	if (scalar(keys(%result)) == 0)
+	{
+		die("ERROR: no valid records found in tracefile $tracefile\n");
+	}
+	if ($negative)
+	{
+		warn("WARNING: negative counts found in tracefile ".
+		     "$tracefile\n");
+	}
+	if ($changed_testname)
+	{
+		warn("WARNING: invalid characters removed from testname in ".
+		     "tracefile $tracefile\n");
+	}
+
+	return(\%result);
+}
+
+
+#
+# get_info_entry(hash_ref)
+#
+# Retrieve data from an entry of the structure generated by read_info_file().
+# Return a list of references to hashes:
+# (test data hash ref, sum count hash ref, funcdata hash ref, checkdata hash
+#  ref, testfncdata hash ref, sumfnccount hash ref, lines found, lines hit,
+#  functions found, functions hit)
+#
+
+sub get_info_entry($)
+{
+	my $testdata_ref = $_[0]->{"test"};
+	my $sumcount_ref = $_[0]->{"sum"};
+	my $funcdata_ref = $_[0]->{"func"};
+	my $checkdata_ref = $_[0]->{"check"};
+	my $testfncdata = $_[0]->{"testfnc"};
+	my $sumfnccount = $_[0]->{"sumfnc"};
+	my $lines_found = $_[0]->{"found"};
+	my $lines_hit = $_[0]->{"hit"};
+	my $f_found = $_[0]->{"f_found"};
+	my $f_hit = $_[0]->{"f_hit"};
+
+	return ($testdata_ref, $sumcount_ref, $funcdata_ref, $checkdata_ref,
+		$testfncdata, $sumfnccount, $lines_found, $lines_hit,
+		$f_found, $f_hit);
+}
+
+
+#
+# set_info_entry(hash_ref, testdata_ref, sumcount_ref, funcdata_ref,
+#                checkdata_ref, testfncdata_ref, sumfcncount_ref[,lines_found,
+#                lines_hit, f_found, f_hit])
+#
+# Update the hash referenced by HASH_REF with the provided data references.
+#
+
+sub set_info_entry($$$$$$$;$$$$)
+{
+	my $data_ref = $_[0];
+
+	$data_ref->{"test"} = $_[1];
+	$data_ref->{"sum"} = $_[2];
+	$data_ref->{"func"} = $_[3];
+	$data_ref->{"check"} = $_[4];
+	$data_ref->{"testfnc"} = $_[5];
+	$data_ref->{"sumfnc"} = $_[6];
+
+	if (defined($_[7])) { $data_ref->{"found"} = $_[7]; }
+	if (defined($_[8])) { $data_ref->{"hit"} = $_[8]; }
+	if (defined($_[9])) { $data_ref->{"f_found"} = $_[9]; }
+	if (defined($_[10])) { $data_ref->{"f_hit"} = $_[10]; }
+}
+
+
+#
+# add_counts(data1_ref, data2_ref)
+#
+# DATA1_REF and DATA2_REF are references to hashes containing a mapping
+#
+#   line number -> execution count
+#
+# Return a list (RESULT_REF, LINES_FOUND, LINES_HIT) where RESULT_REF
+# is a reference to a hash containing the combined mapping in which
+# execution counts are added.
+#
+
+sub add_counts($$)
+{
+	my %data1 = %{$_[0]};	# Hash 1
+	my %data2 = %{$_[1]};	# Hash 2
+	my %result;		# Resulting hash
+	my $line;		# Current line iteration scalar
+	my $data1_count;	# Count of line in hash1
+	my $data2_count;	# Count of line in hash2
+	my $found = 0;		# Total number of lines found
+	my $hit = 0;		# Number of lines with a count > 0
+
+	foreach $line (keys(%data1))
+	{
+		$data1_count = $data1{$line};
+		$data2_count = $data2{$line};
+
+		# Add counts if present in both hashes
+		if (defined($data2_count)) { $data1_count += $data2_count; }
+
+		# Store sum in %result
+		$result{$line} = $data1_count;
+
+		$found++;
+		if ($data1_count > 0) { $hit++; }
+	}
+
+	# Add lines unique to data2
+	foreach $line (keys(%data2))
+	{
+		# Skip lines already in data1
+		if (defined($data1{$line})) { next; }
+
+		# Copy count from data2
+		$result{$line} = $data2{$line};
+
+		$found++;
+		if ($result{$line} > 0) { $hit++; }
+	}
+
+	return (\%result, $found, $hit);
+}
+
+
+#
+# merge_checksums(ref1, ref2, filename)
+#
+# REF1 and REF2 are references to hashes containing a mapping
+#
+#   line number -> checksum
+#
+# Merge checksum lists defined in REF1 and REF2 and return reference to
+# resulting hash. Die if a checksum for a line is defined in both hashes
+# but does not match.
+#
+
+sub merge_checksums($$$)
+{
+	my $ref1 = $_[0];
+	my $ref2 = $_[1];
+	my $filename = $_[2];
+	my %result;
+	my $line;
+
+	foreach $line (keys(%{$ref1}))
+	{
+		if (defined($ref2->{$line}) &&
+		    ($ref1->{$line} ne $ref2->{$line}))
+		{
+			die("ERROR: checksum mismatch at $filename:$line\n");
+		}
+		$result{$line} = $ref1->{$line};
+	}
+
+	foreach $line (keys(%{$ref2}))
+	{
+		$result{$line} = $ref2->{$line};
+	}
+
+	return \%result;
+}
+
+
+#
+# merge_func_data(funcdata1, funcdata2, filename)
+#
+
+sub merge_func_data($$$)
+{
+	my ($funcdata1, $funcdata2, $filename) = @_;
+	my %result;
+	my $func;
+
+	%result = %{$funcdata1};
+
+	foreach $func (keys(%{$funcdata2})) {
+		my $line1 = $result{$func};
+		my $line2 = $funcdata2->{$func};
+
+		if (defined($line1) && ($line1 != $line2)) {
+			warn("WARNING: function data mismatch at ".
+			     "$filename:$line2\n");
+			next;
+		}
+		$result{$func} = $line2;
+	}
+
+	return \%result;
+}
+
+
+#
+# add_fnccount(fnccount1, fnccount2)
+#
+# Add function call count data. Return list (fnccount_added, f_found, f_hit)
+#
+
+sub add_fnccount($$)
+{
+	my ($fnccount1, $fnccount2) = @_;
+	my %result;
+	my $f_found;
+	my $f_hit;
+	my $function;
+
+	%result = %{$fnccount1};
+	foreach $function (keys(%{$fnccount2})) {
+		$result{$function} += $fnccount2->{$function};
+	}
+	$f_found = scalar(keys(%result));
+	$f_hit = 0;
+	foreach $function (keys(%result)) {
+		if ($result{$function} > 0) {
+			$f_hit++;
+		}
+	}
+
+	return (\%result, $f_found, $f_hit);
+}
+
+#
+# add_testfncdata(testfncdata1, testfncdata2)
+#
+# Add function call count data for several tests. Return reference to
+# added_testfncdata.
+#
+
+sub add_testfncdata($$)
+{
+	my ($testfncdata1, $testfncdata2) = @_;
+	my %result;
+	my $testname;
+
+	foreach $testname (keys(%{$testfncdata1})) {
+		if (defined($testfncdata2->{$testname})) {
+			my $fnccount;
+
+			# Function call count data for this testname exists
+			# in both data sets: merge
+			($fnccount) = add_fnccount(
+				$testfncdata1->{$testname},
+				$testfncdata2->{$testname});
+			$result{$testname} = $fnccount;
+			next;
+		}
+		# Function call count data for this testname is unique to
+		# data set 1: copy
+		$result{$testname} = $testfncdata1->{$testname};
+	}
+
+	# Add count data for testnames unique to data set 2
+	foreach $testname (keys(%{$testfncdata2})) {
+		if (!defined($result{$testname})) {
+			$result{$testname} = $testfncdata2->{$testname};
+		}
+	}
+	return \%result;
+}
+
+#
+# combine_info_entries(entry_ref1, entry_ref2, filename)
+#
+# Combine .info data entry hashes referenced by ENTRY_REF1 and ENTRY_REF2.
+# Return reference to resulting hash.
+#
+
+sub combine_info_entries($$$)
+{
+	my $entry1 = $_[0];	# Reference to hash containing first entry
+	my $testdata1;
+	my $sumcount1;
+	my $funcdata1;
+	my $checkdata1;
+	my $testfncdata1;
+	my $sumfnccount1;
+
+	my $entry2 = $_[1];	# Reference to hash containing second entry
+	my $testdata2;
+	my $sumcount2;
+	my $funcdata2;
+	my $checkdata2;
+	my $testfncdata2;
+	my $sumfnccount2;
+
+	my %result;		# Hash containing combined entry
+	my %result_testdata;
+	my $result_sumcount = {};
+	my $result_funcdata;
+	my $result_testfncdata;
+	my $result_sumfnccount;
+	my $lines_found;
+	my $lines_hit;
+	my $f_found;
+	my $f_hit;
+
+	my $testname;
+	my $filename = $_[2];
+
+	# Retrieve data
+	($testdata1, $sumcount1, $funcdata1, $checkdata1, $testfncdata1,
+	 $sumfnccount1) = get_info_entry($entry1);
+	($testdata2, $sumcount2, $funcdata2, $checkdata2, $testfncdata2,
+	 $sumfnccount2) = get_info_entry($entry2);
+
+	# Merge checksums
+	$checkdata1 = merge_checksums($checkdata1, $checkdata2, $filename);
+
+	# Combine funcdata
+	$result_funcdata = merge_func_data($funcdata1, $funcdata2, $filename);
+
+	# Combine function call count data
+	$result_testfncdata = add_testfncdata($testfncdata1, $testfncdata2);
+	($result_sumfnccount, $f_found, $f_hit) =
+		add_fnccount($sumfnccount1, $sumfnccount2);
+	
+	# Combine testdata
+	foreach $testname (keys(%{$testdata1}))
+	{
+		if (defined($testdata2->{$testname}))
+		{
+			# testname is present in both entries, requires
+			# combination
+			($result_testdata{$testname}) =
+				add_counts($testdata1->{$testname},
+					   $testdata2->{$testname});
+		}
+		else
+		{
+			# testname only present in entry1, add to result
+			$result_testdata{$testname} = $testdata1->{$testname};
+		}
+
+		# update sum count hash
+		($result_sumcount, $lines_found, $lines_hit) =
+			add_counts($result_sumcount,
+				   $result_testdata{$testname});
+	}
+
+	foreach $testname (keys(%{$testdata2}))
+	{
+		# Skip testnames already covered by previous iteration
+		if (defined($testdata1->{$testname})) { next; }
+
+		# testname only present in entry2, add to result hash
+		$result_testdata{$testname} = $testdata2->{$testname};
+
+		# update sum count hash
+		($result_sumcount, $lines_found, $lines_hit) =
+			add_counts($result_sumcount,
+				   $result_testdata{$testname});
+	}
+	
+	# Calculate resulting sumcount
+
+	# Store result
+	set_info_entry(\%result, \%result_testdata, $result_sumcount,
+		       $result_funcdata, $checkdata1, $result_testfncdata,
+		       $result_sumfnccount, $lines_found, $lines_hit,
+		       $f_found, $f_hit);
+
+	return(\%result);
+}
+
+
+#
+# combine_info_files(info_ref1, info_ref2)
+#
+# Combine .info data in hashes referenced by INFO_REF1 and INFO_REF2. Return
+# reference to resulting hash.
+#
+
+sub combine_info_files($$)
+{
+	my %hash1 = %{$_[0]};
+	my %hash2 = %{$_[1]};
+	my $filename;
+
+	foreach $filename (keys(%hash2))
+	{
+		if ($hash1{$filename})
+		{
+			# Entry already exists in hash1, combine them
+			$hash1{$filename} =
+				combine_info_entries($hash1{$filename},
+						     $hash2{$filename},
+						     $filename);
+		}
+		else
+		{
+			# Entry is unique in both hashes, simply add to
+			# resulting hash
+			$hash1{$filename} = $hash2{$filename};
+		}
+	}
+
+	return(\%hash1);
+}
+
+
+#
+# add_traces()
+#
+
+sub add_traces()
+{
+	my $total_trace;
+	my $current_trace;
+	my $tracefile;
+	local *INFO_HANDLE;
+
+	info("Combining tracefiles.\n");
+
+	foreach $tracefile (@add_tracefile)
+	{
+		$current_trace = read_info_file($tracefile);
+		if ($total_trace)
+		{
+			$total_trace = combine_info_files($total_trace,
+							  $current_trace);
+		}
+		else
+		{
+			$total_trace = $current_trace;
+		}
+	}
+
+	# Write combined data
+	if ($to_file)
+	{
+		info("Writing data to $output_filename\n");
+		open(INFO_HANDLE, ">$output_filename")
+			or die("ERROR: cannot write to $output_filename!\n");
+		write_info_file(*INFO_HANDLE, $total_trace);
+		close(*INFO_HANDLE);
+	}
+	else
+	{
+		write_info_file(*STDOUT, $total_trace);
+	}
+}
+
+
+#
+# write_info_file(filehandle, data)
+#
+
+sub write_info_file(*$)
+{
+	local *INFO_HANDLE = $_[0];
+	my %data = %{$_[1]};
+	my $source_file;
+	my $entry;
+	my $testdata;
+	my $sumcount;
+	my $funcdata;
+	my $checkdata;
+	my $testfncdata;
+	my $sumfnccount;
+	my $testname;
+	my $line;
+	my $func;
+	my $testcount;
+	my $testfnccount;
+	my $found;
+	my $hit;
+	my $f_found;
+	my $f_hit;
+
+	foreach $source_file (keys(%data))
+	{
+		$entry = $data{$source_file};
+		($testdata, $sumcount, $funcdata, $checkdata, $testfncdata,
+		 $sumfnccount) = get_info_entry($entry);
+		foreach $testname (keys(%{$testdata}))
+		{
+			$testcount = $testdata->{$testname};
+			$testfnccount = $testfncdata->{$testname};
+			$found = 0;
+			$hit   = 0;
+
+			print(INFO_HANDLE "TN:$testname\n");
+			print(INFO_HANDLE "SF:$source_file\n");
+
+			# Write function related data
+			foreach $func (
+				sort({$funcdata->{$a} <=> $funcdata->{$b}}
+				keys(%{$funcdata})))
+			{
+				print(INFO_HANDLE "FN:".$funcdata->{$func}.
+				      ",$func\n");
+			}
+			foreach $func (keys(%{$testfnccount})) {
+				print(INFO_HANDLE "FNDA:".
+				      $testfnccount->{$func}.
+				      ",$func\n");
+			}
+			($f_found, $f_hit) =
+				get_func_found_and_hit($testfnccount);
+			print(INFO_HANDLE "FNF:$f_found\n");
+			print(INFO_HANDLE "FNH:$f_hit\n");
+
+			# Write line related data
+			foreach $line (sort({$a <=> $b} keys(%{$testcount})))
+			{
+				print(INFO_HANDLE "DA:$line,".
+				      $testcount->{$line}.
+				      (defined($checkdata->{$line}) &&
+				       $checksum ?
+				       ",".$checkdata->{$line} : "")."\n");
+				$found++;
+				if ($testcount->{$line} > 0)
+				{
+					$hit++;
+				}
+
+			}
+			print(INFO_HANDLE "LF:$found\n");
+			print(INFO_HANDLE "LH:$hit\n");
+			print(INFO_HANDLE "end_of_record\n");
+		}
+	}
+}
+
+
+#
+# transform_pattern(pattern)
+#
+# Transform shell wildcard expression to equivalent PERL regular expression.
+# Return transformed pattern.
+#
+
+sub transform_pattern($)
+{
+	my $pattern = $_[0];
+
+	# Escape special chars
+
+	$pattern =~ s/\\/\\\\/g;
+	$pattern =~ s/\//\\\//g;
+	$pattern =~ s/\^/\\\^/g;
+	$pattern =~ s/\$/\\\$/g;
+	$pattern =~ s/\(/\\\(/g;
+	$pattern =~ s/\)/\\\)/g;
+	$pattern =~ s/\[/\\\[/g;
+	$pattern =~ s/\]/\\\]/g;
+	$pattern =~ s/\{/\\\{/g;
+	$pattern =~ s/\}/\\\}/g;
+	$pattern =~ s/\./\\\./g;
+	$pattern =~ s/\,/\\\,/g;
+	$pattern =~ s/\|/\\\|/g;
+	$pattern =~ s/\+/\\\+/g;
+	$pattern =~ s/\!/\\\!/g;
+
+	# Transform ? => (.) and * => (.*)
+
+	$pattern =~ s/\*/\(\.\*\)/g;
+	$pattern =~ s/\?/\(\.\)/g;
+
+	return $pattern;
+}
+
+
+#
+# extract()
+#
+
+sub extract()
+{
+	my $data = read_info_file($extract);
+	my $filename;
+	my $keep;
+	my $pattern;
+	my @pattern_list;
+	my $extracted = 0;
+	local *INFO_HANDLE;
+
+	# Need perlreg expressions instead of shell pattern
+	@pattern_list = map({ transform_pattern($_); } @ARGV);
+
+	# Filter out files which do not match any pattern
+	foreach $filename (sort(keys(%{$data})))
+	{
+		$keep = 0;
+
+		foreach $pattern (@pattern_list)
+		{
+			$keep ||= ($filename =~ (/^$pattern$/));
+		}
+
+
+		if (!$keep)
+		{
+			delete($data->{$filename});
+		}
+		else
+		{
+			info("Extracting $filename\n"),
+			$extracted++;
+		}
+	}
+
+	# Write extracted data
+	if ($to_file)
+	{
+		info("Extracted $extracted files\n");
+		info("Writing data to $output_filename\n");
+		open(INFO_HANDLE, ">$output_filename")
+			or die("ERROR: cannot write to $output_filename!\n");
+		write_info_file(*INFO_HANDLE, $data);
+		close(*INFO_HANDLE);
+	}
+	else
+	{
+		write_info_file(*STDOUT, $data);
+	}
+}
+
+
+#
+# remove()
+#
+
+sub remove()
+{
+	my $data = read_info_file($remove);
+	my $filename;
+	my $match_found;
+	my $pattern;
+	my @pattern_list;
+	my $removed = 0;
+	local *INFO_HANDLE;
+
+	# Need perlreg expressions instead of shell pattern
+	@pattern_list = map({ transform_pattern($_); } @ARGV);
+
+	# Filter out files that match the pattern
+	foreach $filename (sort(keys(%{$data})))
+	{
+		$match_found = 0;
+
+		foreach $pattern (@pattern_list)
+		{
+			$match_found ||= ($filename =~ (/$pattern$/));
+		}
+
+
+		if ($match_found)
+		{
+			delete($data->{$filename});
+			info("Removing $filename\n"),
+			$removed++;
+		}
+	}
+
+	# Write data
+	if ($to_file)
+	{
+		info("Deleted $removed files\n");
+		info("Writing data to $output_filename\n");
+		open(INFO_HANDLE, ">$output_filename")
+			or die("ERROR: cannot write to $output_filename!\n");
+		write_info_file(*INFO_HANDLE, $data);
+		close(*INFO_HANDLE);
+	}
+	else
+	{
+		write_info_file(*STDOUT, $data);
+	}
+}
+
+
+#
+# list()
+#
+
+sub list()
+{
+	my $data = read_info_file($list);
+	my $filename;
+	my $found;
+	my $hit;
+	my $entry;
+
+	info("Listing contents of $list:\n");
+
+	# List all files
+	foreach $filename (sort(keys(%{$data})))
+	{
+		$entry = $data->{$filename};
+		(undef, undef, undef, undef, undef, undef, $found, $hit) =
+			get_info_entry($entry);
+		printf("$filename: $hit of $found lines hit\n");
+	}
+}
+
+
+#
+# get_common_filename(filename1, filename2)
+#
+# Check for filename components which are common to FILENAME1 and FILENAME2.
+# Upon success, return
+#
+#   (common, path1, path2)
+#
+#  or 'undef' in case there are no such parts.
+#
+
+sub get_common_filename($$)
+{
+        my @list1 = split("/", $_[0]);
+        my @list2 = split("/", $_[1]);
+	my @result;
+
+	# Work in reverse order, i.e. beginning with the filename itself
+	while (@list1 && @list2 && ($list1[$#list1] eq $list2[$#list2]))
+	{
+		unshift(@result, pop(@list1));
+		pop(@list2);
+	}
+
+	# Did we find any similarities?
+	if (scalar(@result) > 0)
+	{
+	        return (join("/", @result), join("/", @list1),
+			join("/", @list2));
+	}
+	else
+	{
+		return undef;
+	}
+}
+
+
+#
+# strip_directories($path, $depth)
+#
+# Remove DEPTH leading directory levels from PATH.
+#
+
+sub strip_directories($$)
+{
+	my $filename = $_[0];
+	my $depth = $_[1];
+	my $i;
+
+	if (!defined($depth) || ($depth < 1))
+	{
+		return $filename;
+	}
+	for ($i = 0; $i < $depth; $i++)
+	{
+		$filename =~ s/^[^\/]*\/+(.*)$/$1/;
+	}
+	return $filename;
+}
+
+
+#
+# read_diff(filename)
+#
+# Read diff output from FILENAME to memory. The diff file has to follow the
+# format generated by 'diff -u'. Returns a list of hash references:
+#
+#   (mapping, path mapping)
+#
+#   mapping:   filename -> reference to line hash
+#   line hash: line number in new file -> corresponding line number in old file
+#
+#   path mapping:  filename -> old filename
+#
+# Die in case of error.
+#
+
+sub read_diff($)
+{
+	my $diff_file = $_[0];	# Name of diff file
+	my %diff;		# Resulting mapping filename -> line hash
+	my %paths;		# Resulting mapping old path  -> new path
+	my $mapping;		# Reference to current line hash
+	my $line;		# Contents of current line
+	my $num_old;		# Current line number in old file
+	my $num_new;		# Current line number in new file
+	my $file_old;		# Name of old file in diff section
+	my $file_new;		# Name of new file in diff section
+	my $filename;		# Name of common filename of diff section
+	my $in_block = 0;	# Non-zero while we are inside a diff block
+	local *HANDLE;		# File handle for reading the diff file
+
+	info("Reading diff $diff_file\n");
+
+	# Check if file exists and is readable
+	stat($diff_file);
+	if (!(-r _))
+	{
+		die("ERROR: cannot read file $diff_file!\n");
+	}
+
+	# Check if this is really a plain file
+	if (!(-f _))
+	{
+		die("ERROR: not a plain file: $diff_file!\n");
+	}
+
+	# Check for .gz extension
+	if ($diff_file =~ /\.gz$/)
+	{
+		# Check for availability of GZIP tool
+		system_no_output(1, "gunzip", "-h")
+			and die("ERROR: gunzip command not available!\n");
+
+		# Check integrity of compressed file
+		system_no_output(1, "gunzip", "-t", $diff_file)
+			and die("ERROR: integrity check failed for ".
+				"compressed file $diff_file!\n");
+
+		# Open compressed file
+		open(HANDLE, "gunzip -c $diff_file|")
+			or die("ERROR: cannot start gunzip to decompress ".
+			       "file $_[0]!\n");
+	}
+	else
+	{
+		# Open decompressed file
+		open(HANDLE, $diff_file)
+			or die("ERROR: cannot read file $_[0]!\n");
+	}
+
+	# Parse diff file line by line
+	while (<HANDLE>)
+	{
+		chomp($_);
+		$line = $_;
+
+		foreach ($line)
+		{
+			# Filename of old file:
+			# --- <filename> <date>
+			/^--- (\S+)/ && do
+			{
+				$file_old = strip_directories($1, $strip);
+				last;
+			};
+			# Filename of new file:
+			# +++ <filename> <date>
+			/^\+\+\+ (\S+)/ && do
+			{
+				# Add last file to resulting hash
+				if ($filename)
+				{
+					my %new_hash;
+					$diff{$filename} = $mapping;
+					$mapping = \%new_hash;
+				}
+				$file_new = strip_directories($1, $strip);
+				$filename = $file_old;
+				$paths{$filename} = $file_new;
+				$num_old = 1;
+				$num_new = 1;
+				last;
+			};
+			# Start of diff block:
+			# @@ -old_start,old_num, +new_start,new_num @@
+			/^\@\@\s+-(\d+),(\d+)\s+\+(\d+),(\d+)\s+\@\@$/ && do
+			{
+			$in_block = 1;
+			while ($num_old < $1)
+			{
+				$mapping->{$num_new} = $num_old;
+				$num_old++;
+				$num_new++;
+			}
+			last;
+			};
+			# Unchanged line
+			# <line starts with blank>
+			/^ / && do
+			{
+				if ($in_block == 0)
+				{
+					last;
+				}
+				$mapping->{$num_new} = $num_old;
+				$num_old++;
+				$num_new++;
+				last;
+			};
+			# Line as seen in old file
+			# <line starts with '-'>
+			/^-/ && do
+			{
+				if ($in_block == 0)
+				{
+					last;
+				}
+				$num_old++;
+				last;
+			};
+			# Line as seen in new file
+			# <line starts with '+'>
+			/^\+/ && do
+			{
+				if ($in_block == 0)
+				{
+					last;
+				}
+				$num_new++;
+				last;
+			};
+			# Empty line
+			/^$/ && do
+			{
+				if ($in_block == 0)
+				{
+					last;
+				}
+				$mapping->{$num_new} = $num_old;
+				$num_old++;
+				$num_new++;
+				last;
+			};
+		}
+	}
+
+	close(HANDLE);
+
+	# Add final diff file section to resulting hash
+	if ($filename)
+	{
+		$diff{$filename} = $mapping;
+	}
+
+	if (!%diff)
+	{
+		die("ERROR: no valid diff data found in $diff_file!\n".
+		    "Make sure to use 'diff -u' when generating the diff ".
+		    "file.\n");
+	}
+	return (\%diff, \%paths);
+}
+
+
+#
+# apply_diff($count_data, $line_hash)
+#
+# Transform count data using a mapping of lines:
+#
+#   $count_data: reference to hash: line number -> data
+#   $line_hash:  reference to hash: line number new -> line number old
+#
+# Return a reference to transformed count data.
+#
+
+sub apply_diff($$)
+{
+	my $count_data = $_[0];	# Reference to data hash: line -> hash
+	my $line_hash = $_[1];	# Reference to line hash: new line -> old line
+	my %result;		# Resulting hash
+	my $last_new = 0;	# Last new line number found in line hash
+	my $last_old = 0;	# Last old line number found in line hash
+
+	# Iterate all new line numbers found in the diff
+	foreach (sort({$a <=> $b} keys(%{$line_hash})))
+	{
+		$last_new = $_;
+		$last_old = $line_hash->{$last_new};
+
+		# Is there data associated with the corresponding old line?
+		if (defined($count_data->{$line_hash->{$_}}))
+		{
+			# Copy data to new hash with a new line number
+			$result{$_} = $count_data->{$line_hash->{$_}};
+		}
+	}
+	# Transform all other lines which come after the last diff entry
+	foreach (sort({$a <=> $b} keys(%{$count_data})))
+	{
+		if ($_ <= $last_old)
+		{
+			# Skip lines which were covered by line hash
+			next;
+		}
+		# Copy data to new hash with an offset
+		$result{$_ + ($last_new - $last_old)} = $count_data->{$_};
+	}
+
+	return \%result;
+}
+
+
+#
+# get_hash_max(hash_ref)
+#
+# Return the highest integer key from hash.
+#
+
+sub get_hash_max($)
+{
+	my ($hash) = @_;
+	my $max;
+
+	foreach (keys(%{$hash})) {
+		if (!defined($max)) {
+			$max = $_;
+		} elsif ($hash->{$_} > $max) {
+			$max = $_;
+		}
+	}
+	return $max;
+}
+
+sub get_hash_reverse($)
+{
+	my ($hash) = @_;
+	my %result;
+
+	foreach (keys(%{$hash})) {
+		$result{$hash->{$_}} = $_;
+	}
+
+	return \%result;
+}
+
+#
+# apply_diff_to_funcdata(funcdata, line_hash)
+#
+
+sub apply_diff_to_funcdata($$)
+{
+	my ($funcdata, $linedata) = @_;
+	my $last_new = get_hash_max($linedata);
+	my $last_old = $linedata->{$last_new};
+	my $func;
+	my %result;
+	my $line_diff = get_hash_reverse($linedata);
+
+	foreach $func (keys(%{$funcdata})) {
+		my $line = $funcdata->{$func};
+
+		if (defined($line_diff->{$line})) {
+			$result{$func} = $line_diff->{$line};
+		} elsif ($line > $last_old) {
+			$result{$func} = $line + $last_new - $last_old;
+		}
+	}
+
+	return \%result;
+}
+
+
+#
+# get_line_hash($filename, $diff_data, $path_data)
+#
+# Find line hash in DIFF_DATA which matches FILENAME. On success, return list
+# line hash. or undef in case of no match. Die if more than one line hashes in
+# DIFF_DATA match.
+#
+
+sub get_line_hash($$$)
+{
+	my $filename = $_[0];
+	my $diff_data = $_[1];
+	my $path_data = $_[2];
+	my $conversion;
+	my $old_path;
+	my $new_path;
+	my $diff_name;
+	my $common;
+	my $old_depth;
+	my $new_depth;
+
+	foreach (keys(%{$diff_data}))
+	{
+		# Try to match diff filename with filename
+		if ($filename =~ /^\Q$diff_path\E\/$_$/)
+		{
+			if ($diff_name)
+			{
+				# Two files match, choose the more specific one
+				# (the one with more path components)
+				$old_depth = ($diff_name =~ tr/\///);
+				$new_depth = (tr/\///);
+				if ($old_depth == $new_depth)
+				{
+					die("ERROR: diff file contains ".
+					    "ambiguous entries for ".
+					    "$filename\n");
+				}
+				elsif ($new_depth > $old_depth)
+				{
+					$diff_name = $_;
+				}
+			}
+			else
+			{
+				$diff_name = $_;
+			}
+		};
+	}
+	if ($diff_name)
+	{
+		# Get converted path
+		if ($filename =~ /^(.*)$diff_name$/)
+		{
+			($common, $old_path, $new_path) =
+				get_common_filename($filename,
+					$1.$path_data->{$diff_name});
+		}
+		return ($diff_data->{$diff_name}, $old_path, $new_path);
+	}
+	else
+	{
+		return undef;
+	}
+}
+
+
+#
+# convert_paths(trace_data, path_conversion_data)
+#
+# Rename all paths in TRACE_DATA which show up in PATH_CONVERSION_DATA.
+#
+
+sub convert_paths($$)
+{
+	my $trace_data = $_[0];
+	my $path_conversion_data = $_[1];
+	my $filename;
+	my $new_path;
+
+	if (scalar(keys(%{$path_conversion_data})) == 0)
+	{
+		info("No path conversion data available.\n");
+		return;
+	}
+
+	# Expand path conversion list
+	foreach $filename (keys(%{$path_conversion_data}))
+	{
+		$new_path = $path_conversion_data->{$filename};
+		while (($filename =~ s/^(.*)\/[^\/]+$/$1/) &&
+		       ($new_path =~ s/^(.*)\/[^\/]+$/$1/) &&
+		       ($filename ne $new_path))
+		{
+			$path_conversion_data->{$filename} = $new_path;
+		}
+	}
+
+	# Adjust paths
+	FILENAME: foreach $filename (keys(%{$trace_data}))
+	{
+		# Find a path in our conversion table that matches, starting
+		# with the longest path
+		foreach (sort({length($b) <=> length($a)}
+			      keys(%{$path_conversion_data})))
+		{
+			# Is this path a prefix of our filename?
+			if (!($filename =~ /^$_(.*)$/))
+			{
+				next;
+			}
+			$new_path = $path_conversion_data->{$_}.$1;
+
+			# Make sure not to overwrite an existing entry under
+			# that path name
+			if ($trace_data->{$new_path})
+			{
+				# Need to combine entries
+				$trace_data->{$new_path} =
+					combine_info_entries(
+						$trace_data->{$filename},
+						$trace_data->{$new_path},
+						$filename);
+			}
+			else
+			{
+				# Simply rename entry
+				$trace_data->{$new_path} =
+					$trace_data->{$filename};
+			}
+			delete($trace_data->{$filename});
+			next FILENAME;
+		}
+		info("No conversion available for filename $filename\n");
+	}
+}
+
+#
+# sub adjust_fncdata(funcdata, testfncdata, sumfnccount)
+#
+# Remove function call count data from testfncdata and sumfnccount which
+# is no longer present in funcdata.
+#
+
+sub adjust_fncdata($$$)
+{
+	my ($funcdata, $testfncdata, $sumfnccount) = @_;
+	my $testname;
+	my $func;
+	my $f_found;
+	my $f_hit;
+
+	# Remove count data in testfncdata for functions which are no longer
+	# in funcdata
+	foreach $testname (%{$testfncdata}) {
+		my $fnccount = $testfncdata->{$testname};
+
+		foreach $func (%{$fnccount}) {
+			if (!defined($funcdata->{$func})) {
+				delete($fnccount->{$func});
+			}
+		}
+	}
+	# Remove count data in sumfnccount for functions which are no longer
+	# in funcdata
+	foreach $func (%{$sumfnccount}) {
+		if (!defined($funcdata->{$func})) {
+			delete($sumfnccount->{$func});
+		}
+	}
+}
+
+#
+# get_func_found_and_hit(sumfnccount)
+#
+# Return (f_found, f_hit) for sumfnccount
+#
+
+sub get_func_found_and_hit($)
+{
+	my ($sumfnccount) = @_;
+	my $function;
+	my $f_found;
+	my $f_hit;
+
+	$f_found = scalar(keys(%{$sumfnccount}));
+	$f_hit = 0;
+	foreach $function (keys(%{$sumfnccount})) {
+		if ($sumfnccount->{$function} > 0) {
+			$f_hit++;
+		}
+	}
+	return ($f_found, $f_hit);
+}
+
+#
+# diff()
+#
+
+sub diff()
+{
+	my $trace_data = read_info_file($diff);
+	my $diff_data;
+	my $path_data;
+	my $old_path;
+	my $new_path;
+	my %path_conversion_data;
+	my $filename;
+	my $line_hash;
+	my $new_name;
+	my $entry;
+	my $testdata;
+	my $testname;
+	my $sumcount;
+	my $funcdata;
+	my $checkdata;
+	my $testfncdata;
+	my $sumfnccount;
+	my $found;
+	my $hit;
+	my $f_found;
+	my $f_hit;
+	my $converted = 0;
+	my $unchanged = 0;
+	local *INFO_HANDLE;
+
+	($diff_data, $path_data) = read_diff($ARGV[0]);
+
+        foreach $filename (sort(keys(%{$trace_data})))
+        {
+		# Find a diff section corresponding to this file
+		($line_hash, $old_path, $new_path) =
+			get_line_hash($filename, $diff_data, $path_data);
+		if (!$line_hash)
+		{
+			# There's no diff section for this file
+			$unchanged++;
+			next;
+		}
+		$converted++;
+		if ($old_path && $new_path && ($old_path ne $new_path))
+		{
+			$path_conversion_data{$old_path} = $new_path;
+		}
+		# Check for deleted files
+		if (scalar(keys(%{$line_hash})) == 0)
+		{
+			info("Removing $filename\n");
+			delete($trace_data->{$filename});
+			next;
+		}
+		info("Converting $filename\n");
+		$entry = $trace_data->{$filename};
+		($testdata, $sumcount, $funcdata, $checkdata, $testfncdata,
+		 $sumfnccount) = get_info_entry($entry);
+		# Convert test data
+		foreach $testname (keys(%{$testdata}))
+		{
+			$testdata->{$testname} =
+				apply_diff($testdata->{$testname}, $line_hash);
+			# Remove empty sets of test data
+			if (scalar(keys(%{$testdata->{$testname}})) == 0)
+			{
+				delete($testdata->{$testname});
+				delete($testfncdata->{$testname});
+			}
+		}
+		# Rename test data to indicate conversion
+		foreach $testname (keys(%{$testdata}))
+		{
+			# Skip testnames which already contain an extension
+			if ($testname =~ /,[^,]+$/)
+			{
+				next;
+			}
+			# Check for name conflict
+			if (defined($testdata->{$testname.",diff"}))
+			{
+				# Add counts
+				($testdata->{$testname}) = add_counts(
+					$testdata->{$testname},
+					$testdata->{$testname.",diff"});
+				delete($testdata->{$testname.",diff"});
+				# Add function call counts
+				($testfncdata->{$testname}) = add_fnccount(
+					$testfncdata->{$testname},
+					$testfncdata->{$testname.",diff"});
+				delete($testfncdata->{$testname.",diff"});
+			}
+			# Move test data to new testname
+			$testdata->{$testname.",diff"} = $testdata->{$testname};
+			delete($testdata->{$testname});
+			# Move function call count data to new testname
+			$testfncdata->{$testname.",diff"} =
+				$testfncdata->{$testname};
+			delete($testfncdata->{$testname});
+		}
+		# Convert summary of test data
+		$sumcount = apply_diff($sumcount, $line_hash);
+		# Convert function data
+		$funcdata = apply_diff_to_funcdata($funcdata, $line_hash);
+		# Convert checksum data
+		$checkdata = apply_diff($checkdata, $line_hash);
+		# Convert function call count data
+		adjust_fncdata($funcdata, $testfncdata, $sumfnccount);
+		($f_found, $f_hit) = get_func_found_and_hit($sumfnccount);
+		# Update found/hit numbers
+		$found = 0;
+		$hit = 0;
+		foreach (keys(%{$sumcount}))
+		{
+			$found++;
+			if ($sumcount->{$_} > 0)
+			{
+				$hit++;
+			}
+		}
+		if ($found > 0)
+		{
+			# Store converted entry
+			set_info_entry($entry, $testdata, $sumcount, $funcdata,
+				       $checkdata, $testfncdata, $sumfnccount,
+				       $found, $hit, $f_found, $f_hit);
+		}
+		else
+		{
+			# Remove empty data set
+			delete($trace_data->{$filename});
+		}
+        }
+
+	# Convert filenames as well if requested
+	if ($convert_filenames)
+	{
+		convert_paths($trace_data, \%path_conversion_data);
+	}
+
+	info("$converted entr".($converted != 1 ? "ies" : "y")." converted, ".
+	     "$unchanged entr".($unchanged != 1 ? "ies" : "y")." left ".
+	     "unchanged.\n");
+
+	# Write data
+	if ($to_file)
+	{
+		info("Writing data to $output_filename\n");
+		open(INFO_HANDLE, ">$output_filename")
+			or die("ERROR: cannot write to $output_filename!\n");
+		write_info_file(*INFO_HANDLE, $trace_data);
+		close(*INFO_HANDLE);
+	}
+	else
+	{
+		write_info_file(*STDOUT, $trace_data);
+	}
+}
+
+
+#
+# system_no_output(mode, parameters)
+#
+# Call an external program using PARAMETERS while suppressing depending on
+# the value of MODE:
+#
+#   MODE & 1: suppress STDOUT
+#   MODE & 2: suppress STDERR
+#
+# Return 0 on success, non-zero otherwise.
+#
+
+sub system_no_output($@)
+{
+	my $mode = shift;
+	my $result;
+	local *OLD_STDERR;
+	local *OLD_STDOUT;
+
+	# Save old stdout and stderr handles
+	($mode & 1) && open(OLD_STDOUT, ">>&STDOUT");
+	($mode & 2) && open(OLD_STDERR, ">>&STDERR");
+
+	# Redirect to /dev/null
+	($mode & 1) && open(STDOUT, ">/dev/null");
+	($mode & 2) && open(STDERR, ">/dev/null");
+ 
+	system(@_);
+	$result = $?;
+
+	# Close redirected handles
+	($mode & 1) && close(STDOUT);
+	($mode & 2) && close(STDERR);
+
+	# Restore old handles
+	($mode & 1) && open(STDOUT, ">>&OLD_STDOUT");
+	($mode & 2) && open(STDERR, ">>&OLD_STDERR");
+ 
+	return $result;
+}
+
+
+#
+# read_config(filename)
+#
+# Read configuration file FILENAME and return a reference to a hash containing
+# all valid key=value pairs found.
+#
+
+sub read_config($)
+{
+	my $filename = $_[0];
+	my %result;
+	my $key;
+	my $value;
+	local *HANDLE;
+
+	if (!open(HANDLE, "<$filename"))
+	{
+		warn("WARNING: cannot read configuration file $filename\n");
+		return undef;
+	}
+	while (<HANDLE>)
+	{
+		chomp;
+		# Skip comments
+		s/#.*//;
+		# Remove leading blanks
+		s/^\s+//;
+		# Remove trailing blanks
+		s/\s+$//;
+		next unless length;
+		($key, $value) = split(/\s*=\s*/, $_, 2);
+		if (defined($key) && defined($value))
+		{
+			$result{$key} = $value;
+		}
+		else
+		{
+			warn("WARNING: malformed statement in line $. ".
+			     "of configuration file $filename\n");
+		}
+	}
+	close(HANDLE);
+	return \%result;
+}
+
+
+#
+# apply_config(REF)
+#
+# REF is a reference to a hash containing the following mapping:
+#
+#   key_string => var_ref
+#
+# where KEY_STRING is a keyword and VAR_REF is a reference to an associated
+# variable. If the global configuration hash CONFIG contains a value for
+# keyword KEY_STRING, VAR_REF will be assigned the value for that keyword. 
+#
+
+sub apply_config($)
+{
+	my $ref = $_[0];
+
+	foreach (keys(%{$ref}))
+	{
+		if (defined($config->{$_}))
+		{
+			${$ref->{$_}} = $config->{$_};
+		}
+	}
+}
+
+sub warn_handler($)
+{
+	my ($msg) = @_;
+
+	warn("$tool_name: $msg");
+}
+
+sub die_handler($)
+{
+	my ($msg) = @_;
+
+	die("$tool_name: $msg");
+}