Compute the CRC‐32 checksum of a buffer, using a hardware‐accelerated implementation if available or a portable software implementation as a default.

Synopsis

Declared in <folly/hash/Checksum.h>

uint32_t
crc32(
    uint8_t const* data,
    size_t nbytes,
    uint32_t startingChecksum = ~0U);

Return Value

The CRC‐32 checksum of the buffer

Parameters

Name

Description

data

Pointer to the buffer to checksum

nbytes

Number of bytes in the buffer

startingChecksum

Initial checksum value to continue from

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