Function MSG_WriteField

code/qcommon/msg.cpp:616–656

#define	FLOAT_INT_BIAS	(1<<(FLOAT_INT_BITS-1))

void MSG_WriteField (msg_t *msg, const int *toF, const netField_t *field)
{
	int			trunc;
	float		fullFloat;

	if ( field->bits == -1)
	{	// a -1 in the bits field means it's a float that's always between -1 and 1
		int temp = *(float *)toF * 32767;
 		MSG_WriteBits( msg, temp, -16 );
	}
	else
 	if ( field->bits == 0 ) {
 		// float
 		fullFloat = *(float *)toF;
 		trunc = (int)fullFloat;

		if (fullFloat == 0.0f) {
			MSG_WriteBits( msg, 0, 1 );	//it's a zero
		} else {
			MSG_WriteBits( msg, 1, 1 );	//not a zero
			if ( trunc == fullFloat && trunc + FLOAT_INT_BIAS >= 0 &&
				trunc + FLOAT_INT_BIAS < ( 1 << FLOAT_INT_BITS ) ) {
				// send as small integer
				MSG_WriteBits( msg, 0, 1 );
				MSG_WriteBits( msg, trunc + FLOAT_INT_BIAS, FLOAT_INT_BITS );
			} else {
				// send as full floating point value
				MSG_WriteBits( msg, 1, 1 );
				MSG_WriteBits( msg, *toF, 32 );
			}
		}
 	} else {
		if (*toF == 0) {
			MSG_WriteBits( msg, 0, 1 );	//it's a zero
		} else {
			MSG_WriteBits( msg, 1, 1 );	//not a zero
			// integer
			MSG_WriteBits( msg, *toF, field->bits );
		}
 	}
}

void MSG_ReadField (msg_t *msg, int *toF, const netField_t *field, int print)
{