CRC functions with a parameterized engine optimized for both speed and size
- Pure TypeScript, run anywhere
- Optimized for speed
- Table-based algorithm
- Minimal initialization code
- Optimized for size
- Shared engine < 500 bytes with standard web compression
- Tables generated on first use
- Minimal additional overhead to each variant
- Individually importable algorithms
- 100+ known digests provided, plus the option of configuring your own
- Streamable interface, just call update for each chunk
- Number for small digests, 32-bit or less
- BigInt for larger digests
- Digest values always an unsigned integer
- Supports 8-bit typed arrays, regular arrays, and array-like objects
- Pure methods, can be assigned directly to variables as needed
The most-common 32-bit digest, used by PNG, ZIP, and more.
importCRC32from'@hqtsm/crc/crc-32/iso-hdlc';letcrc=CRC32.init();crc=CRC32.update(crc,newTextEncoder().encode('123456789'));crc=CRC32.finalize(crc);console.assert(crc.toString(16)==='cbf43926');A common 64-bit digest, sometimes incorrectly refered to as ECMA-182.
importCRC64from'@hqtsm/crc/crc-64/xz';letcrc=CRC64.init();crc=CRC64.update(crc,newTextEncoder().encode('123456789'));crc=CRC64.finalize(crc);console.assert(crc.toString(16)==='995dc9bbdf1939fa');Thanks to pycrc for the inspiration and validation checking.
Thanks to CRC RevEng for cataloging the different digests.
