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Fixed wrong condition in mrb_int_mul_overflow().

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2020-11-14 23:34:43 +09:00
parent 2c6a5d3a77
commit bb1fb2f43d
1 changed files with 2 additions and 2 deletions
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include/mruby/numeric.h
+2 -2
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@@ -68,7 +68,7 @@ MRB_API mrb_value mrb_num_mul(mrb_state *mrb, mrb_value x, mrb_value y);
#endif
#endif
#ifdef MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS
#if 0 && defined MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS
static inline mrb_bool
mrb_int_add_overflow(mrb_int augend, mrb_int addend, mrb_int *sum)
@@ -122,7 +122,7 @@ mrb_int_mul_overflow(mrb_int a, mrb_int b, mrb_int *c)
#ifdef MRB_INT32
int64_t n = (int64_t)a * b;
*c = (mrb_int)n;
return n <= MRB_INT_MAX && n >= MRB_INT_MIN;
return n > MRB_INT_MAX && n < MRB_INT_MIN;
#else /* MRB_INT64 */
if (a > 0 && b > 0 && a > MRB_INT_MAX / b) return TRUE;
if (a < 0 && b > 0 && a < MRB_INT_MIN / b) return TRUE;