entity parser

void demoCutParsePacketEntities(msg_t *msg, clSnapshot_t *oldSnap, clSnapshot_t *newSnap, clientActive_t *clCut) {
	/* The beast that is entity parsing */
	int			newnum;
	entityState_t	*oldstate, *newstate;
	int			oldindex = 0;
	int			oldnum;
	newSnap->parseEntitiesNum = clCut->parseEntitiesNum;
	newSnap->numEntities = 0;
	newnum = MSG_ReadBits(msg, GENTITYNUM_BITS);
	while (1) {
		// read the entity index number
		if (oldSnap && oldindex < oldSnap->numEntities) {
			oldstate = &clCut->parseEntities[(oldSnap->parseEntitiesNum + oldindex) & (MAX_PARSE_ENTITIES-1)];
			oldnum = oldstate->number;
		} else {
			oldstate = 0;
			oldnum = 99999;
		}
		newstate = &clCut->parseEntities[clCut->parseEntitiesNum];
		if (!oldstate && (newnum == (MAX_GENTITIES-1))) {
			break;
		} else if (oldnum < newnum) {
			*newstate = *oldstate;
			oldindex++;
		} else if (oldnum == newnum) {
			oldindex++;
			MSG_ReadDeltaEntity(msg, oldstate, newstate, newnum);
			newnum = MSG_ReadBits(msg, GENTITYNUM_BITS);
		} else if (oldnum > newnum) {
			MSG_ReadDeltaEntity(msg, &clCut->entityBaselines[newnum], newstate, newnum);
			newnum = MSG_ReadBits(msg, GENTITYNUM_BITS);
		}
		if (newstate->number == MAX_GENTITIES-1)
			continue;
		clCut->parseEntitiesNum++;
		clCut->parseEntitiesNum &= (MAX_PARSE_ENTITIES-1);
		newSnap->numEntities++;
	}
}