diff options
Diffstat (limited to 'ext/bcmath/libbcmath/src/num2long.c')
-rw-r--r-- | ext/bcmath/libbcmath/src/num2long.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/ext/bcmath/libbcmath/src/num2long.c b/ext/bcmath/libbcmath/src/num2long.c index 81e82a6fac..228f6645a2 100644 --- a/ext/bcmath/libbcmath/src/num2long.c +++ b/ext/bcmath/libbcmath/src/num2long.c @@ -54,12 +54,19 @@ bc_num2long (num) /* Extract the int value, ignore the fraction. */ val = 0; nptr = num->n_value; - for (index=num->n_len; (index>0) && (val<=(LONG_MAX/BASE)); index--) - val = val*BASE + *nptr++; + for (index = num->n_len; index > 0; index--) { + char n = *nptr++; - /* Check for overflow. If overflow, return zero. */ - if (index>0) val = 0; - if (val < 0) val = 0; + if (val > LONG_MAX/BASE) { + return 0; + } + val *= BASE; + + if (val > LONG_MAX - n) { + return 0; + } + val += n; + } /* Return the value. */ if (num->n_sign == PLUS) |