utils.gno

 1package uint256
 2
 3func checkNumberS(input string) error {
 4	const fn = "UnmarshalText"
 5	l := len(input)
 6	if l == 0 {
 7		return errEmptyString(fn, input)
 8	}
 9	if l < 2 || input[0] != '0' ||
10		(input[1] != 'x' && input[1] != 'X') {
11		return errMissingPrefix(fn, input)
12	}
13	if l == 2 {
14		return errEmptyNumber(fn, input)
15	}
16	if len(input) > 3 && input[2] == '0' {
17		return errLeadingZero(fn, input)
18	}
19	return nil
20}