38 lines
994 B
Markdown
38 lines
994 B
Markdown
crc32
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=====
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It computes [crc32s,][crc] and what of it?
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[crc]: http://en.wikipedia.org/wiki/Cyclic_redundancy_check
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Update
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------
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If portability isn't a concern; as in your compiler can build gnu11 code;
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I'd recommend you use the ["modern"](https://github.com/notwa/crc32/tree/modern) branch.
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The code is much cleaner and slightly faster.
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Usage
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----
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```
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crc32 - a 32-bit cyclic rendundancy check calculator
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<files...> open files as inputs
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-h display this text
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-s <n> start cycle with n (default: 0xFFFFFFFF)
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-p <n> use n as the crc divisor (default: 0x04C11DB7)
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-e use big endian calculations
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-b output as binary
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-x NOT the output
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-r reverse output's bits
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numbers <n> may be entered as hexadecimal or octal with prefixes
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```
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Notes
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-----
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* Does not pad input.
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* Big endian calculations are somewhat untested.
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## [Smaller Still](https://gist.github.com/notwa/5689243)
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