Avoid `uint64_t` in string-to-integer conversion; ref
MODIFY
src/string.c
src/string.c
@@ -2216,7 +2216,7 @@ mrb_str_len_to_inum(mrb_state *mrb, const char *str, size_t len, mrb_int base, i
const char *pend = str + len;
char sign = 1;
int c;
- uint64_t n = 0;
+ mrb_int n = 0;
mrb_int val;
#define conv_digit(c) \
@@ -2343,15 +2343,17 @@ mrb_str_len_to_inum(mrb_state *mrb, const char *str, size_t len, mrb_int base, i
if (c < 0 || c >= base) {
break;
}
- n *= base;
- n += c;
- if (n > (uint64_t)MRB_INT_MAX) {
- if (sign == 0 && n == (uint64_t)MRB_INT_MIN) {
+ if (mrb_int_mul_overflow(n, base, &n)) goto overflow;
+ if (MRB_INT_MAX - c < n) {
+ if (sign == 0 && MRB_INT_MAX - n == c - 1) {
+ n = MRB_INT_MIN;
sign = 1;
break;
}
+ overflow:
mrb_raisef(mrb, E_RANGE_ERROR, "string (%l) too big for integer", str, pend-str);
}
+ n += c;
}
val = (mrb_int)n;
if (badcheck) {

Avoid `uint64_t` in string-to-integer conversion; ref #5201