| --TEST-- | |
| bcmul() checking overflow | |
| --EXTENSIONS-- | |
| bcmath | |
| --INI-- | |
| bcmath.scale=0 | |
| --FILE-- | |
| for ($i = 1; $i < 15; $i++) { | |
| $repeat = 2 ** $i; | |
| $num1 = str_repeat('99999999', $repeat); | |
| /* | |
| * 9999 * 9999 = 99980001 | |
| * 99999999 * 99999999 = 9999999800000001 | |
| */ | |
| $expected = str_repeat('9', $repeat * 8 - 1) . '8' . str_repeat('0', $repeat * 8 - 1) . '1'; | |
| $actual = bcmul($num1, $num1); | |
| echo $repeat . ': ' . ($actual === $expected ? 'OK' : 'NG') . PHP_EOL; | |
| } | |
| --EXPECT-- | |
| 2: OK | |
| 4: OK | |
| 8: OK | |
| 16: OK | |
| 32: OK | |
| 64: OK | |
| 128: OK | |
| 256: OK | |
| 512: OK | |
| 1024: OK | |
| 2048: OK | |
| 4096: OK | |
| 8192: OK | |
| 16384: OK | |