Function AR_RIGHT

src/arithmetic/string_funcs/string_funcs.c:72–99

returns a string containing the specified number of rightmost characters of the original string.

// returns a string containing the specified number of rightmost characters of the original string.
SIValue AR_RIGHT(SIValue *argv, int argc, void *private_data) {
	if(SIValue_IsNull(argv[0])) return SI_NullVal();
	
	int64_t newlen = -1;
	if(SI_TYPE(argv[1]) == T_INT64) {
		newlen = argv[1].longval;
	}
	if(newlen < 0) {
		ErrorCtx_SetError("length must be a non-negative integer");
		return SI_NullVal();
	}

	const char *str = argv[0].stringval;
	int64_t start   = str_length(str) - newlen;

	if(start <= 0) {
		// No need to truncate this string based on the requested length
		return SI_DuplicateStringVal(str);
	}

	utf8proc_int32_t c;
	int64_t start_bytes = 0;
	for (int i = 0; i < start; i++) {
		start_bytes += utf8proc_iterate((const utf8proc_uint8_t *)(str+start_bytes), -1, &c);
	}

	return SI_DuplicateStringVal(str + start_bytes);
}

// returns the original string with trailing whitespace removed.
SIValue AR_RTRIM(SIValue *argv, int argc, void *private_data) {