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/*
* Copyright (C) 2007-2012 Xagasoft, All rights reserved.
*
* This file is part of the Xagasoft Build and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "functionregex.h"
#include <bu/regex.h>
#include <bu/plugger.h>
PluginInterface3( pluginFunctionRegEx, regex, FunctionRegEx, Function,
"Mike Buland", 0, 1 );
FunctionRegEx::FunctionRegEx()
{
}
FunctionRegEx::~FunctionRegEx()
{
}
Bu::String FunctionRegEx::getName() const
{
return "regex";
}
Variable FunctionRegEx::call( Variable &input, VarList lParams )
{
if( lParams.getSize() == 1 )
{
Bu::RegEx re( lParams.first().getString() );
switch( input.getType() )
{
case Variable::typeString:
return re.execute( input.getString() );
case Variable::typeList:
{
Variable vOut( Variable::typeList );
for( VarList::iterator i = input.begin(); i; i++ )
{
if( re.execute( (*i).toString() ) )
vOut.append( *i );
}
return vOut;
}
break;
default:
break;
}
}
else if( lParams.getSize() == 2 )
{
Bu::RegEx re( lParams.first().getString() );
Bu::String sPat = lParams.last().getString();
switch( input.getType() )
{
case Variable::typeString:
if( re.execute( input.getString() ) )
{
return replace( re, input.getString(), sPat );
}
else
{
return input;
}
break;
case Variable::typeList:
{
Variable vOut( Variable::typeList );
for( VarList::iterator i = input.begin(); i; i++ )
{
if( re.execute( (*i).toString() ) )
vOut.append( replace( re, (*i).toString(), sPat ) );
else
vOut.append( *i );
}
return vOut;
}
break;
default:
break;
}
}
throw Bu::ExceptionBase(
"regex does not work on non-string or non-list types.");
}
Bu::String FunctionRegEx::replace( Bu::RegEx &re, const Bu::String &sSrc,
const Bu::String &sPat )
{
Bu::String sOut;
int iStart, iEnd;
re.getSubStringRange( 0, iStart, iEnd ); // Get the range of the full match
if( iStart > 0 )
sOut.append( sSrc, 0, iStart );
for( Bu::String::const_iterator i = sPat.begin(); i; i++ )
{
if( *i == '\\' )
{
i++;
if( *i <= '9' && *i >= '0' )
{
int iInd = *i-'0';
if( iInd < re.getNumSubStrings() )
sOut += re.getSubString( iInd );
}
else
{
sOut += *i;
}
}
else
{
sOut += *i;
}
}
if( iEnd < sSrc.getSize() )
{
sOut.append( sSrc, iEnd, -1 );
}
return sOut;
}
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