SimpleMachines /
SMF2.1
| @@ 162-177 (lines=16) @@ | ||
| 159 | * @param string $number |
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| 160 | * @return string The crc32 polynomial of $number |
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| 161 | */ |
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| 162 | if (!function_exists('smf_crc32')) |
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| 163 | { |
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| 164 | function smf_crc32($number) |
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| 165 | { |
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| 166 | $crc = crc32($number); |
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| 167 | ||
| 168 | if ($crc & 0x80000000) |
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| 169 | { |
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| 170 | $crc ^= 0xffffffff; |
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| 171 | $crc += 1; |
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| 172 | $crc = -$crc; |
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| 173 | } |
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| 174 | ||
| 175 | return $crc; |
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| 176 | } |
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| 177 | } |
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| 178 | ||
| 179 | ?> |
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| @@ 3257-3279 (lines=23) @@ | ||
| 3254 | return $data; |
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| 3255 | } |
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| 3256 | ||
| 3257 | if (!function_exists('smf_crc32')) |
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| 3258 | { |
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| 3259 | /** |
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| 3260 | * crc32 doesn't work as expected on 64-bit functions - make our own. |
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| 3261 | * https://php.net/crc32#79567 |
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| 3262 | * |
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| 3263 | * @param string $number |
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| 3264 | * @return string The crc32 |
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| 3265 | */ |
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| 3266 | function smf_crc32($number) |
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| 3267 | { |
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| 3268 | $crc = crc32($number); |
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| 3269 | ||
| 3270 | if ($crc & 0x80000000) |
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| 3271 | { |
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| 3272 | $crc ^= 0xffffffff; |
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| 3273 | $crc += 1; |
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| 3274 | $crc = -$crc; |
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| 3275 | } |
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| 3276 | ||
| 3277 | return $crc; |
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| 3278 | } |
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| 3279 | } |
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| 3280 | ||
| 3281 | ?> |
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