Created
September 6, 2019 10:13
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| int isAsciiDigit(int x) { | |
| int overflower = (1 << 31) ^ (~0x39); | |
| int overflowed = (x + overflower) >> 31; | |
| if (overflowed) { | |
| printf("Overflowed, so not an AsciiDigit.\n"); | |
| } | |
| return !overflowed & !((x >> 4) ^ 3); | |
| } |
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