Module std.digest.crc

Note

CRCs are usually printed with the MSB first. When using std.digest.digest.toHexString the result will be in an unexpected order. Use std.digest.digest.toHexString's optional order parameter to specify decreasing order for the correct result. The crcHexString alias can also be used for this purpose.

References

Wikipedia on CRC

Standards

Implements the 'common' IEEE CRC32 variant (LSB-first order, Initial value uint.max, complement result)

CTFE

Digests do not work in CTFE

Example

//Template API
import std.digest.crc;

ubyte[4] hash = crc32Of("The quick brown fox jumps over the lazy dog");
assert(crcHexString(hash) == "414FA339");

//Feeding data
ubyte[1024] data;
CRC32 crc;
crc.put(data[]);
crc.start(); //Start again
crc.put(data[]);
hash = crc.finish();

Example

//OOP API
import std.digest.crc;

auto crc = new CRC32Digest();
ubyte[] hash = crc.digest("The quick brown fox jumps over the lazy dog");
assert(crcHexString(hash) == "414FA339"); //352441c2

//Feeding data
ubyte[1024] data;
crc.put(data[]);
crc.reset(); //Start again
crc.put(data[]);
hash = crc.finish();