Method safeSwapPtr

src/Bullet3Serialize/Bullet2FileLoader/b3File.cpp:852–905

}

void bFile::safeSwapPtr(char *dst, const char *src)
{
	if (!src || !dst)
		return;

	int ptrFile = mFileDNA->getPointerSize();
	int ptrMem = mMemoryDNA->getPointerSize();

	if (ptrFile == ptrMem)
	{
		memcpy(dst, src, ptrMem);
	}
	else if (ptrMem == 4 && ptrFile == 8)
	{
		b3PointerUid *oldPtr = (b3PointerUid *)src;
		b3PointerUid *newPtr = (b3PointerUid *)dst;

		if (oldPtr->m_uniqueIds[0] == oldPtr->m_uniqueIds[1])
		{
			//Bullet stores the 32bit unique ID in both upper and lower part of 64bit pointers
			//so it can be used to distinguish between .blend and .bullet
			newPtr->m_uniqueIds[0] = oldPtr->m_uniqueIds[0];
		}
		else
		{
			//deal with pointers the Blender .blend style way, see
			//readfile.c in the Blender source tree
			b3Long64 longValue = *((b3Long64 *)src);
			//endian swap for 64bit pointer otherwise truncation will fail due to trailing zeros
			if (mFlags & FD_ENDIAN_SWAP)
				B3_SWITCH_LONGINT(longValue);
			*((int *)dst) = (int)(longValue >> 3);
		}
	}
	else if (ptrMem == 8 && ptrFile == 4)
	{
		b3PointerUid *oldPtr = (b3PointerUid *)src;
		b3PointerUid *newPtr = (b3PointerUid *)dst;
		if (oldPtr->m_uniqueIds[0] == oldPtr->m_uniqueIds[1])
		{
			newPtr->m_uniqueIds[0] = oldPtr->m_uniqueIds[0];
			newPtr->m_uniqueIds[1] = 0;
		}
		else
		{
			*((b3Long64 *)dst) = *((int *)src);
		}
	}
	else
	{
		printf("%d %d\n", ptrFile, ptrMem);
		assert(0 && "Invalid pointer len");
	}
}

// ----------------------------------------------------- //
void bFile::getMatchingFileDNA(short *dna_addr, const char *lookupName, const char *lookupType, char *strcData, char *data, bool fixupPointers)