diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | time.c | 8 |
2 files changed, 9 insertions, 4 deletions
@@ -1,3 +1,8 @@ +Thu Apr 1 04:30:11 2010 Tanaka Akira <akr@fsij.org> + + * time.c (long_mul): overflow condition changed. + (wi_mul): ditto. + Wed Mar 31 23:33:29 2010 Tanaka Akira <akr@fsij.org> * time.c (long_mul): extracted from mul and avoid integer overflow. @@ -103,8 +103,8 @@ long_mul(long x, long y, long *z) else { b = (unsigned long)y; } - c = a * b; - if (c / b == a) { + if (a <= ULONG_MAX / b) { + c = a * b; if (s < 0) { if (c <= (unsigned long)LONG_MAX + 1) { *z = -(long)c; @@ -478,8 +478,8 @@ wi_mul(wideint_t x, wideint_t y, wideint_t *z) else { b = (uwideint_t)y; } - c = a * b; - if (c / b == a) { + if (a <= UWIDEINT_MAX / b) { + c = a * b; if (s < 0) { if (c <= (uwideint_t)WIDEINT_MAX + 1) { *z = -(wideint_t)c; |