Crate crc32c

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Expand description

This crate provides the CRC-32-Castagnoli algorithm.

It provides both a software implementation, and a hardware-optimized one for SSE 4.2.

§Example

let message = b"Hello world!";

let crc = crc32c::crc32c(message);

assert_eq!(crc, 0x7B_98_E7_51);

§Enabling hardware acceleration

If you compile your code with -C target-features=+sse4.2, then the hardware-optimized version will be compiled into the code.

Otherwise, the crate will use cpuid at runtime to detect the running CPU’s features, and enable the appropriate algorithm.

Structs§

Crc32cHasher: Implementor of Hasher for CRC-32C.
Crc32cReader: Reader wrapper which tracks the checksum of all bytes read.
Crc32cWriter: Writer wrapper which tracks the checksum of all bytes written.

Functions§

crc32c: Computes the CRC for the data payload.
crc32c_append: Computes the CRC for the data payload, starting with a previous CRC value.
crc32c_combine: Computes the “combined” value of two CRC32c values. Specifically, given two byte streams A and B and their CRC32c check values crc32c(A) and crc32c(B), this function calculates crc32c(AB) using only crc32c(A), crc32c(B), and the length of B.