diff -r 000000000000 -r 83f4b4db085c sbsv1_os/e32toolp/e32util/featurevariantparser.pm
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sbsv1_os/e32toolp/e32util/featurevariantparser.pm	Tue Feb 02 01:39:43 2010 +0200
@@ -0,0 +1,940 @@
+#
+# Copyright (c) 2007 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:
+#
+
+# Module FEATUREVARIANTPARSER. Parses .VAR files and returns key variables.
+
+# The following hashes can be used with this module:
+
+# NAME 				-> Returns the name of the variant file (without the extension)
+
+# FULLPATH 			-> Returns the full path of the variant file (including the extension)
+
+# VALID 			-> Set to 1 if the variant file is valid, otherwise set to 0
+
+# VIRTUAL 			-> Set to 1 if the variant is a grouping node, otherwise set to 0
+
+# ROM_INCLUDES 		-> Returns a pointer to the list of ROM_INCLUDES (including Parent nodes).
+
+# BUILD_INCLUDES 	-> Returns a pointer to the list of BUILD_INCLUDES (including Parent nodes).
+
+# VARIANT_HRH 		-> Returns the full VARIANT_HRH file path used by the VAR file.
+
+# PARENTS			-> Returns a pointer to the list of all the parent nodes, starting with immediate parent
+
+# CHILDREN			-> Returns a pointer to the list of all the children nodes.
+
+# USAGE : The GetVariant method should only be called using featurevariantparser->GetVariant(var_name, directory(optional) );
+# If the directory for the VAR file is not supplied,the default directory will be searched for var_name.var
+
+use strict;
+
+package featurevariantparser;
+use File::Spec;
+
+my @buildinclude;
+my @rominclude;
+my @parents;
+my @childNodes;
+my $virtual;
+my $childNodeStatus;
+my $varianthrh;
+
+my $defaultDir = "$ENV{EPOCROOT}epoc32\\tools\\variant";
+
+my $dir;
+my $fullpath;
+my $fulldir;
+
+my $pathregex = '.+[^\s]'  ;   # Regex to match all characters (including \ or /), excluding whitespaces.
+
+our $verbose = 0;
+
+# Wrapper function to return all the correct variables
+# Arguments : (Variant Name, Variant Directory(optional))
+# Returns a Hash.
+#
+# Note: This has to return a copy of all the data - no references!
+#  There are package globals that are reused on a call to this function
+#  so references would go out of date after repeated calls to GetVariant
+#  This package should have been written using objects - too late now
+
+sub GetVariant
+{
+
+    @buildinclude    = ();
+    @rominclude      = ();
+    @parents         = ();
+    @childNodes      = ();
+    $dir             = "";
+    $fullpath        = "";
+    $varianthrh      = "";
+    $virtual         = 0;
+    $childNodeStatus = 0;
+    
+    my $parnodes = "";
+    my %data;
+    my $children  = "";
+    my $romincs   = "";
+    my $buildincs = "";
+
+    $data{'VALID'} = 0;
+
+    my ( $empty, $varname, $dirname ) = @_;
+
+    my $fullvarpath = ReturnFullVariantPath( $varname, $dirname );
+
+    if ( $dirname )
+    {
+        $fulldir = $dirname;
+    }
+    else
+    {
+        $fulldir = $defaultDir;
+    }
+
+    $data{'FULLPATH'} = "$fullvarpath";
+    $data{'NAME'}     = "$varname";
+
+    # If the variant file exists, check the syntax and setup variables.
+    if ( FileExists($fullvarpath) )
+    {
+
+        if ( CheckVarFileSyntax( $fullvarpath, $varname ) )
+        {
+            $data{'VALID'} = 1;
+        }
+    }
+    else
+    {
+        print "ERROR: $fullpath" . " does not exist\n";
+    }
+
+    my $count = 0;
+
+    # If VAR file is valid, setup all other variables.
+    if ( $data{'VALID'} )
+    {
+
+        $romincs   = FindRomInclude($fullvarpath);
+        $buildincs = FindBuildInclude($fullvarpath);
+        $children  = FindChildNodes($fullvarpath);
+        $parnodes  = FindParentNodes($fullvarpath);
+
+        # Remove empty elements from the BUILD_INCLUDE list     
+        @$buildincs = grep /\S/, @$buildincs;
+
+        # Fix paths for all BUILD_INCLUDES
+        for ( my $i = 0 ; $i < scalar(@$buildincs) ; $i++ )
+        {
+            @$buildincs[$i] = FixPaths( @$buildincs[$i] );
+        }
+
+        # Remove empty elements from the ROM_INCLUDE list
+		@$romincs = grep /\S/, @$romincs;
+
+        # Fix paths for all ROM_INCLUDES
+        for ( my $i = 0 ; $i < scalar(@$romincs) ; $i++ )
+        {
+            @$romincs[$i] = FixPaths( @$romincs[$i] );
+        }
+
+        # Remove empty elements from the CHILDREN list
+		@$children = grep /\S/, @$children;
+		
+        # Remove empty elements from the PARENT list
+		@$parnodes = grep /\S/, @$parnodes;
+
+        $data{'BUILD_INCLUDES'} = CloneList($buildincs);        
+        $data{'ROM_INCLUDES'}   = CloneList($romincs);
+        $data{'PARENTS'}        = CloneList($parnodes);
+        $data{'CHILDREN'}       = CloneList($children);
+        $data{'VARIANT_HRH'}    = $varianthrh;
+        $data{'VIRTUAL'}        = $virtual;
+    }
+
+    # If variant file is not valid, return reference to a blank array
+    else
+    {
+        $data{'BUILD_INCLUDES'} = [];
+        $data{'ROM_INCLUDES'}   = [];
+        $data{'VARIANT_HRH'}    = "";
+        $data{'PARENTS'}        = [];
+        $data{'CHILDREN'}       = [];
+    }
+
+    return %data;
+}
+
+# Helper method that clones a reference to a simple list
+sub CloneList
+    {
+    my $ref = shift;
+    
+    # Check the reference is a list
+    die "Not a list ref" if ref($ref) ne 'ARRAY';
+    
+    # Create a new list object
+    my @list;
+    foreach my $entry ( @$ref )
+        {
+        # Only clone lists of scalars
+        die "Not a scalar" if ref($entry);
+        
+        # Add the entry to the new list
+        push @list, $entry;
+        }
+    
+    # return a reference to the copy    
+    return \@list;
+    }
+    
+# Method to correct all the slashes, and also append EPOCROOT if the path begins with a \ or /
+# If path doesn't start with \ or /, returns an abosulte canonical path
+sub FixPaths
+{
+
+    my $arr = $_[0];
+
+    if ( $arr =~ m/^\// )
+    {
+       $arr =~ s/^\/?//;
+        return File::Spec->canonpath( "$ENV{EPOCROOT}" . "$arr" );
+    }
+
+    elsif ( $arr =~ m/^\\/ )
+    {
+        $arr =~ s/^\\?//;
+        return File::Spec->canonpath( "$ENV{EPOCROOT}" . "$arr" );
+    }
+
+    else
+    {
+        return File::Spec->rel2abs( File::Spec->canonpath("$arr") );
+    }
+
+}
+
+# Method to construct a full variant path from the variant file and directory
+sub ReturnFullVariantPath
+{
+
+    my $vardirectory = $_[1];
+    my $varname      = $_[0];
+
+    # Check if a directory is supplied
+    if ($vardirectory)
+    {
+        $dir = "$vardirectory";
+    }
+
+    else
+    {
+        $dir = $defaultDir;
+    }
+    my $filename = "$varname" . "\.var";
+    $fullpath = File::Spec->catfile( File::Spec->rel2abs($dir), $filename );
+
+    if ( !File::Spec->file_name_is_absolute($fullpath) )
+    {
+        $fullpath = File::Spec->rel2abs($fullpath);
+    }
+
+    return $fullpath;
+}
+
+# Method to find the BUILDINCLUDE values of the VAR file.
+sub FindBuildInclude
+{
+
+    my $filename = $_[0];
+
+    my $parentNodes;
+
+    # Construct a list of parent nodes if node is a child
+    if ($childNodeStatus)
+    {
+        $parentNodes = FindParentNodes("$filename");
+    }
+
+    if ($parentNodes)
+    {
+
+        # Go through and build the list of all parent BUILD_INCLUDES
+        for ( my $i = scalar(@$parentNodes) - 1 ; $i >= 0 ; $i-- )
+        {
+
+            my $tmp = ReturnFullVariantPath( @$parentNodes[$i], $fulldir );
+            open( NEWHANDLE, "<$tmp" );
+            while (<NEWHANDLE>)
+            {
+                if (/BUILD_INCLUDE/)
+                {
+                    ExtractBuildIncludeValue($_);
+                }
+            }
+            close(NEWHANDLE);
+        }
+    }
+
+    # Append the BUILD_INCLUDES of the VAR file in the end
+    open( NEWHANDLE, "<$filename" );
+
+    while (<NEWHANDLE>)
+    {
+        if (/BUILD_INCLUDE/)
+        {
+            ExtractBuildIncludeValue($_);
+        }
+    }
+    close(NEWHANDLE);
+
+    undef(@parents);    # Flush out parent array
+
+    return \@buildinclude;
+
+}
+
+# Method to extract the BUILD_INCLUDE value of a node.
+sub ExtractBuildIncludeValue
+{
+
+# If modifier append is found, push the buildinclude to the end of the array list.
+    if (/^BUILD_INCLUDE\s+append\s+($pathregex)/)
+    {
+        push( @buildinclude, ($1) );
+
+    }
+
+# If modifier prepend is found, push the buildinclude to the beginning of the array list.
+    if (/^BUILD_INCLUDE\s+prepend\s+($pathregex)/)
+    {
+        unshift( @buildinclude, ($1) );
+    }
+
+#If keyword set is found, then empty the buildinclude variable and push the new value
+    if (/^BUILD_INCLUDE\s+set\s+($pathregex)/)
+    {
+        undef(@buildinclude);
+        push( @buildinclude, ($1) );
+    }
+
+}
+
+# Method to find the ROMINCLUDE values of the VAR file.
+sub FindRomInclude
+{
+
+    my $filename = $_[0];
+
+    my $parentNodes;
+
+    # Construct a list of parent nodes if node is a child
+    if ($childNodeStatus)
+    {
+        $parentNodes = FindParentNodes("$filename");
+    }
+
+    if ($parentNodes)
+    {
+
+        # Go through and build the list of all parent ROM_INCLUDES
+        for ( my $i = scalar(@$parentNodes) - 1 ; $i >= 0 ; $i-- )
+        {
+            my $t = ReturnFullVariantPath( @$parentNodes[$i], $fulldir );
+            open( NEWHANDLE, "<$t" );
+
+            while (<NEWHANDLE>)
+            {
+                if (/ROM_INCLUDE/)
+                {
+                    ExtractRomIncludeValue($_);
+                }
+            }
+            close(NEWHANDLE);
+        }
+    }
+
+    # Append the ROM_INCLUDES of the VAR file in the end
+    open( NEWHANDLE, "<$filename" );
+
+    while (<NEWHANDLE>)
+    {
+        if (/ROM_INCLUDE/)
+        {
+            ExtractRomIncludeValue($_);
+        }
+    }
+
+    undef(@parents);    # Flush out parent array;
+    return \@rominclude;
+
+}
+
+# Method to extract the ROM_INCLUDE value of a node.
+sub ExtractRomIncludeValue
+{
+
+# If modifier append is found, push the rominclude to the end of the array list.
+    if (/^ROM_INCLUDE\s+append\s+($pathregex)/)
+    {
+        push( @rominclude, ($1) );
+    }
+
+# If modifier prepend is found, push the rominclude to the beginning of the array list.
+    if (/^ROM_INCLUDE\s+prepend\s+($pathregex)/)
+    {
+        unshift( @rominclude, ($1) );
+    }
+
+# If keyword set is found, then empty the rominclude variable and push the new value
+    if (/^ROM_INCLUDE\s+set\s+($pathregex)/)
+    {
+        undef(@rominclude);
+        push( @rominclude, ($1) );
+    }
+
+}
+
+# Method to find the immediate parent node of a child node
+sub ExtractExtendsValue
+{
+
+    $_[0] =~ m/^EXTENDS\s+(\w+)/;
+    return $1;
+}
+
+# Extract the value of the VARIANT keyword
+sub ExtractVariantValue
+{
+
+    $_[0] =~ m/^VARIANT\s+(\w+)/;
+    return $1;
+}
+
+# Extracts the value of the HRH file from the VARIANT_HRH line supplied
+sub ExtractHrhValue
+{
+
+    $_[0] =~ m/^VARIANT_HRH\s+($pathregex)/;
+    return $1;
+
+}
+
+# Finds if the variant file is a group node
+# Note: This method is only a supplementary method, not actually used during this module
+#       Provides a quick way to check is any VAR file is grouping node or not without loading the entire file.
+sub IsVirtual
+{
+
+    my $filename = $_[0];
+
+    open( READHANDLE, "<$filename" );
+    while (<READHANDLE>)
+    {
+        if (/^VIRTUAL\s*$/)
+        {
+            close(READHANDLE);
+            return 1;
+        }
+    }
+    close(READHANDLE);
+    return 0;
+}
+
+# Constructs a list of Parent nodes for a given Child node.
+sub FindParentNodes
+{
+
+    my $filename   = $_[0];
+    my $hasparents = 0;
+
+    open( READHANDLE, "<$filename" );
+    while (<READHANDLE>)
+    {
+        if (/EXTENDS/)
+        {
+            $hasparents = 1;
+            push( @parents, ExtractExtendsValue($_) );
+
+        }
+    }
+
+    close(READHANDLE);
+
+    if ( $hasparents == 1 )
+    {
+        FindParentNodes(
+            ReturnFullVariantPath( @parents[ scalar(@parents) - 1 ], $fulldir )
+        );
+    }
+    else
+    {
+        return \@parents;
+    }
+
+}
+
+# Constructs a list of Child nodes for a given Parent node (full path or .var path required)
+sub FindChildNodes
+{
+
+    my $var = ReturnNativeVarName("$_[0]");
+
+    my $tmpname    = "";
+    my @childarray = ();
+
+    opendir( DIR, $fulldir );
+
+    while ( defined( my $file = readdir(DIR) ) )
+    {
+
+        if ( $file =~ m/\.var$/ )
+        {
+            $tmpname = $file;
+            $tmpname =~ s/\.var$//;
+
+            open( FILEHANDLE, ReturnFullVariantPath( $tmpname, $fulldir ) );
+
+            while (<FILEHANDLE>)
+            {
+
+                if (/^EXTENDS/)
+                {
+                    if ( lc $var eq lc ExtractExtendsValue($_) )
+                    {
+                        push( @childarray, $tmpname );
+                    }
+                }
+
+            }
+            close(FILEHANDLE);
+        }
+    }
+
+    close(DIR);
+
+    foreach my $child (@childarray)
+    {
+        push( @childNodes, $child );
+    }
+
+    foreach my $child (@childarray)
+    {
+        FindChildNodes( ReturnFullVariantPath( $child, $fulldir ) );
+    }
+
+    return \@childNodes;
+}
+
+# Method to return all the buildable (i.e. No syntax erros and non-virtual) list of
+# variants that can be built in the specified directory. If no directory is specified,
+# the default location is searched.
+
+# Usage: GetBuildableFeatureVariants(<Directory>)
+
+sub GetBuildableFeatureVariants
+{
+
+    my $empty = shift;
+    my $dir   = shift;
+    my @list;
+    my $fulldir;
+
+    if ( $dir )
+    {
+        $fulldir = $dir;
+    }
+    else
+    {
+        $fulldir = $defaultDir;
+    }
+
+    opendir( DIR, $fulldir );
+
+    while ( defined( my $file = readdir(DIR) ) )
+    {
+
+        if ( $file =~ m/\.var$/ )
+        {
+
+            $file =~ s/\.var$//;
+
+            my $fullpath = ReturnFullVariantPath( $file, $fulldir );
+
+            if ( CheckVarFileSyntax( $fullpath, $file )
+                && !IsVirtual($fullpath) )
+            {
+                push( @list, $file );
+
+            }
+        }
+    }
+
+    return sort @list;
+
+}
+
+# Method to return a list of the valid and non-virtual children of a given VAR node, in a given location.
+# If the calling var file is non-virtual, it is returned as the only element of the list If not, then
+# the method parses though and finds all buildable children
+
+# USAGE: ResolveFeatureVariant(<varname>,<dirame>);
+
+sub ResolveFeatureVariant
+{
+
+    my $empty   = shift;
+    my $varfile = shift;
+    my $dir     = shift;
+    my $fulldir;
+    my @list;
+
+    if ( !$dir eq "" )
+    {
+        $fulldir = $dir;
+    }
+    else
+    {
+        $fulldir = $defaultDir;
+    }
+    my $fullpath = ReturnFullVariantPath( $varfile, $fulldir );
+
+    if ( CheckVarFileSyntax( $fullpath, $varfile ) && !IsVirtual($fullpath) )
+    {
+        push( @list, $varfile );
+        return @list;
+    }
+
+    my %variant = GetVariant( 0, $varfile, $fulldir );
+    my $child = $variant{'CHILDREN'};
+
+    foreach my $item (@$child)
+    {
+
+        my $fullpath = ReturnFullVariantPath( $item, $fulldir );
+
+        if ( CheckVarFileSyntax( $fullpath, $item ) && !IsVirtual($fullpath) )
+        {
+            push( @list, $item );
+        }
+    }
+
+    return @list;
+
+}
+
+# Method to return all valid (no syntax errors only) list of variants
+# in the specified directory. If no directory is specified,the default location is searched.
+
+# Usage: GetValidVariants(<Directory>)
+
+sub GetValidVariants
+{
+
+    my $empty = shift;
+    my $dir   = shift;
+    my @list;
+    my $fulldir;
+
+    if ( !$dir eq "" )
+    {
+        $fulldir = $dir;
+    }
+    else
+    {
+        $fulldir = $defaultDir;
+    }
+
+    opendir( DIR, $fulldir );
+
+    while ( defined( my $file = readdir(DIR) ) )
+    {
+
+        if ( $file =~ m/\.var$/ )
+        {
+
+            $file =~ s/\.var$//;
+
+            my $fullpath = ReturnFullVariantPath( $file, $fulldir );
+
+            if ( CheckVarFileSyntax( $fullpath, $file ) )
+            {
+
+                push( @list, $file );
+
+            }
+        }
+    }
+
+    return sort @list;
+}
+
+# Returns the Variant name from a complete path, without the .var extension
+sub ReturnNativeVarName
+{
+
+    my $tmp = "$_[0]";
+    $tmp =~ /^.*[\\|\/](.*)\.var$/i;  
+    return $1;
+
+}
+
+# Checks if a file passed to this function exists.
+sub FileExists
+{
+	return -e $_[0];
+
+}
+
+# Checks if the default variant file (default.var) exists in the directory supplied.
+# If no directory is supplied, looks under the default location.
+# Should only be called directly from the featurevariantparser module reference, not from any methods within the module.
+
+# USAGE: featurevariantparser->DefaultExists(<DirName>);
+# <DirName> : Optional -- Specifies which directory to look under to find the default.var file. Can be relative or absolute.
+
+sub DefaultExists
+{
+
+    my $dirToSearch = "";
+    if ( $_[1] )
+    {
+        $dirToSearch = $_[1];
+    }
+    else
+    {
+        $dirToSearch = $defaultDir;
+    }
+
+    $dirToSearch =
+      File::Spec->canonpath(
+        File::Spec->rel2abs( File::Spec->canonpath("$dirToSearch") ) );
+
+    return ( -e "$dirToSearch/default.var" );
+
+}
+
+# Checks the variant file for the correct syntax and reports any errors
+# Also sets up some variables(VIRTUAL ,VARIANT_HRH and VARIANT) whilst file is being parsed.
+
+# Usage: CheckVarFileSyntaxt(<fullpath>,<varfile>) . Note: <varfile> without .var
+sub CheckVarFileSyntax
+{
+
+    my $fullpath          = $_[0];
+    my $varname           = $_[1];
+    my $varianthrhpresent = 0;
+
+    open( READVAR, "<$fullpath" );
+    my $exp  = "#";
+    my $line = "";
+
+    while (<READVAR>)
+    {
+        $line = $.;
+
+	# Checks for a valid argument supplied to EXTENDS keyword. Checks for one and only one argument supplied.
+        if (/^EXTENDS/)
+        {
+            if ( !m/^EXTENDS\s+./ )
+            {
+                print "\nERROR: Invalid format supplied to argument EXTENDS on line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+            my $str = ExtractExtendsValue($_);
+            if ( $str =~ /\s+/ )
+            {
+                print "\nERROR: Cannot extend from two nodes. Error in line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+
+            $childNodeStatus = 1;
+
+        }
+
+        # Checks for the grammar of BUILD_INCLUDE, i.e. KEYWORD MODIFIER VALUE
+        elsif (/^BUILD_INCLUDE/)
+        {
+
+          if (!m/^BUILD_INCLUDE\s+(append|prepend|set)\s+$pathregex/)
+            {
+                print "\nERROR: Invalid syntax supplied to keyword BUILD_INCLUDE on line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+            
+		 if (m/^BUILD_INCLUDE\s+(append|prepend|set)\s+$pathregex\s+$pathregex/)
+            {
+                print "\nERROR: Too many arguments supplied to keyword BUILD_INCLUDE on line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+        }
+
+        # Checks for the grammar of ROM_INCLUDE, i.e. KEYWORD MODIFIER VALUE
+        elsif (/^ROM_INCLUDE/)
+        {
+
+		if (!m/^ROM_INCLUDE\s+(append|prepend|set)\s+$pathregex/)
+            {
+                print "\nERROR: Invalid syntax supplied to keyword ROM_INCLUDE on line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+
+       if (m/^ROM_INCLUDE\s+(append|prepend|set)\s+$pathregex\s+$pathregex/)
+            {
+                print "\nERROR: Too many arguments supplied to keyword ROM_INCLUDE on line "
+                  . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+        }
+
+        # Checks for a valid VARIANT name
+        elsif (/^VARIANT[^_HRH]/)
+        {
+            if ( !m/^VARIANT\s+\w+/ )
+            {
+                print "\nERROR: VARIANT name not specified on line " . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+            if ( uc("$varname") ne uc( ExtractVariantValue($_) ) )
+            {
+                print "\nERROR: VARIANT filename does not match variant name specified on line "
+                  . "$line"
+                  . " in file "
+                  . "$fullpath"
+                  . "\nVariant value extracted from the VAR file is " . "$_";
+            }
+
+        }
+
+        # Checks that keyword VIRTUAL is declared correctly
+        elsif (/^VIRTUAL/)
+        {
+            if (m/^VIRTUAL\s+\w+/)
+            {
+                print "\nERROR: Invalid declaration of VIRTUAL on line " . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+
+            $virtual = 1;
+        }
+
+        # Checks if VARIANT_HRH is declared correctly.
+        elsif (/^VARIANT_HRH/)
+        {
+            $varianthrhpresent = 1;
+            my $lineno = $.;
+            if ( !m/^VARIANT_HRH\s+./ )
+            {
+                print "\nERROR: Invalid format supplied to argument VARIANT_HRH on line "
+                  . "$lineno"
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+
+            my $str = ExtractHrhValue($_);
+            if ( $str =~ /\s+/ )
+            {
+                print "\nERROR: Cannot have 2 or more hrh files. Error in line "
+                  . "$lineno"
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+
+            if ( !FileExists( FixPaths($str) ) )
+            {
+                print "\nERROR: VARIANT HRH file : "
+                  . FixPaths($str)
+                  . " specified on line "
+                  . "$lineno"
+                  . " does not exist";
+                return 0;
+            }
+
+            $varianthrh = FixPaths( ExtractHrhValue($_) );
+
+        }
+        
+        # If none of the valid keywords are found
+        else
+        {
+
+            # Do nothing if a comment or blank line is found
+            if ( (m/$exp\s+\S/) || (m/$exp\S/) || ( !m/./ ) || (m/^\n/) )
+            {
+            }
+
+            # Unsupported keyword
+            else
+            {
+
+                print "\nERROR: Invalid keyword " . '"' . "$_" . '"'
+                  . " found on line " . "$."
+                  . " in file "
+                  . "$fullpath";
+                return 0;
+            }
+        }
+    }
+
+    close(READVAR);
+
+    # If no HRH file defined, check if the default one exists
+    if ( !$varianthrhpresent )
+    {
+        print "\nINFO: No VARIANT_HRH defined in VAR file, using $ENV{EPOCROOT}epoc32\\include\\variant\\$varname\.hrh" if ($verbose);
+        my $str =
+          ExtractHrhValue(
+            "VARIANT_HRH $ENV{EPOCROOT}epoc32\\include\\variant\\$varname\.hrh"
+          );
+
+        if ( !FileExists($str) )
+        {
+            print "\nERROR: VARIANT HRH file : " . "$str " . "does not exist\n";
+            return 0;
+        }
+        else
+        {
+            $varianthrh = $str;
+        }
+    }
+    return 1;
+}
+
+1;
+