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py/parsenum: Simplify and generalise decoding of digit values.

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This function should be able to parse integers with any value for the
base, because it is called by int('xxx', base).
This commit is contained in:
Damien George 2016-12-28 12:02:49 +11:00
parent 25f44c19f1
commit c2dd494bd9
1 changed files with 8 additions and 10 deletions
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18
py/parsenum.c
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@ -81,20 +81,18 @@ mp_obj_t mp_parse_num_integer(const char *restrict str_, size_t len, int base, m
for (; str < top; str++) {
// get next digit as a value
mp_uint_t dig = *str;
if (unichar_isdigit(dig) && (int)dig - '0' < base) {
// 0-9 digit
dig = dig - '0';
} else if (base == 16) {
dig |= 0x20;
if ('a' <= dig && dig <= 'f') {
// a-f hex digit
dig = dig - 'a' + 10;
if ('0' <= dig && dig <= '9') {
dig -= '0';
} else {
dig |= 0x20; // make digit lower-case
if ('a' <= dig && dig <= 'z') {
dig -= 'a' - 10;
} else {
// unknown character
break;
}
} else {
// unknown character
}
if (dig >= base) {
break;
}