Function iMemSwap

DevIL/src-IL/src/il_utility.cpp:148–171

}

ILAPI void ILAPIENTRY iMemSwap(ILubyte *s1, ILubyte *s2, const ILuint size)
{
	const ILuint block_size = 4096;
	const ILuint blocks = size/block_size;
	ILuint i;

	ILubyte *block = (ILubyte*)ialloc(block_size);
	if(block == NULL) return;
	for( i = 0; i < blocks; i++ ) {
		memcpy(block,s1,block_size);
		memcpy(s1,s2,block_size);
		memcpy(s2,block,block_size);
		s2 += block_size;
		s1 += block_size;
	}
	i = size - i*block_size;
	if( i > 0 ) {
		memcpy(block,s1,i);
		memcpy(s1,s2,i);
		memcpy(s2,block,i);
	}
	ifree(block);
	return;
}