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/*
FALCON - The Falcon Programming Language.
FILE: string.cpp
Item-oriented Core String implementation.
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: Sat, 03 Jan 2009 23:43:11 +0100
-------------------------------------------------------------------
(C) Copyright 2009: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
#include <falcon/string.h>
#include <falcon/item.h>
#include <falcon/error.h>
#include <falcon/vm.h>
#include <stdio.h>
namespace Falcon
{
Item::Item( const String &str )
{
CoreString* cstr = new CoreString( str );
cstr->bufferize();
setString( cstr );
}
StringGarbage::~StringGarbage()
{
}
bool StringGarbage::finalize()
{
delete m_str;
// as we're in m_str, we are destroyed here.
return true; // prevent destructor to be called.
}
void String::readProperty( const String &prop, Item &item )
{
VMachine *vm = VMachine::getCurrent();
fassert( vm != 0 );
// try to find a generic method
CoreClass* cc = vm->getMetaClass( FLC_ITEM_STRING );
if ( cc != 0 )
{
uint32 id;
if( cc->properties().findKey( prop, id ) )
{
item = *cc->properties().getValue( id );
item.methodize( this );
return;
}
}
String extra;
item.typeName( extra );
extra.A( '.' ).A( prop );
throw new AccessError( ErrorParam( e_prop_acc, __LINE__ ).extra( extra ) );
}
void String::readIndex( const Item &index, Item &target )
{
switch( index.type() )
{
case FLC_ITEM_INT:
{
int32 pos = (int32) index.asInteger();
if ( checkPosBound( pos ) )
{
CoreString *gcs = new CoreString();
gcs->append( getCharAt( pos ) );
target = gcs;
return;
}
}
break;
case FLC_ITEM_NUM:
{
int32 pos = (int32) index.asNumeric();
if ( checkPosBound( pos ) )
{
CoreString *gcs = new CoreString();
gcs->append( getCharAt( pos ) );
target = gcs;
return;
}
}
break;
case FLC_ITEM_RANGE:
{
int32 rstart = (int32) index.asRangeStart();
if ( index.asRangeIsOpen() )
{
if ( checkPosBound( rstart ) ) {
target = new CoreString( *this, rstart );
}
else {
target = new CoreString;
}
return;
}
else {
int32 rend = (int32) index.asRangeEnd();
if ( checkRangeBound( rstart, rend ) )
{
target = new CoreString( *this, rstart, rend );
return;
}
else {
target = new CoreString;
}
return;
}
}
break;
case FLC_ITEM_REFERENCE:
readIndex( index.asReference()->origin(), target );
return;
}
throw new AccessError( ErrorParam( e_arracc, __LINE__ ).extra( "string" ) );
}
void String::writeIndex( const Item &index, const Item &target )
{
register int32 pos;
switch( index.type() )
{
case FLC_ITEM_INT:
pos = (int32) index.asInteger();
break;
case FLC_ITEM_NUM:
pos = (int32) index.asNumeric();
break;
case FLC_ITEM_RANGE:
{
if ( target.isString() )
{
register int pos = (int) index.asRangeStart();
register int end = (int) (index.asRangeIsOpen() ? this->length() : index.asRangeEnd());
if ( checkRangeBound( pos, end ) )
{
if ( change( pos, end, *target.asString() ) )
{
return;
}
}
}
}
throw new AccessError( ErrorParam( e_arracc, __LINE__ ).extra( "string" ) );
case FLC_ITEM_REFERENCE:
writeIndex( index.asReference()->origin(), target );
return;
default:
throw new AccessError( ErrorParam( e_arracc, __LINE__ ).extra( "string" ) );
}
if ( target.type() == FLC_ITEM_STRING )
{
String *cs_orig = target.asString();
if( cs_orig->length() > 0 ) {
if ( checkPosBound( pos ) ) {
setCharAt( pos, cs_orig->getCharAt(0) );
return;
}
}
}
else if( target.isOrdinal() )
{
int64 chr = target.forceInteger();
if ( (chr >= 0) && (chr <= (int64) 0xFFFFFFFF) )
{
if ( checkPosBound( pos ) ) {
setCharAt( pos, (uint32) chr );
return;
}
}
}
throw new AccessError( ErrorParam( e_arracc, __LINE__ ).extra( "string" ) );
}
}
/* end of stringitem.cpp */
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