Function SIValue_Add

src/value.c:477–487

}

SIValue SIValue_Add(const SIValue a, const SIValue b) {
	if(a.type == T_NULL || b.type == T_NULL) return SI_NullVal();
	if(a.type == T_ARRAY || b.type == T_ARRAY) return SIValue_ConcatList(a, b);
	if(a.type == T_STRING || b.type == T_STRING) return SIValue_ConcatString(a, b);
	/* Only construct an integer return if both operands are integers. */
	if(a.type & b.type & T_INT64) {
		return SI_LongVal(a.longval + b.longval);
	}
	/* Return a double representation. */
	return SI_DoubleVal(SI_GET_NUMERIC(a) + SI_GET_NUMERIC(b));
}

SIValue SIValue_Subtract(const SIValue a, const SIValue b) {
	/* Only construct an integer return if both operands are integers. */