Compute a CRC32C value from an existing value and an additional buffer.

Synopsis

Declared in <absl/crc/crc32c.h>

crc32c_t
ExtendCrc32c(
    crc32c_t initial_crc,
    std::string_view buf_to_add);

Description

Computes a CRC32C value from an initial_crc CRC32C value including the buf_to_add bytes of an additional buffer. Using this function is more efficient than computing a CRC32C value for the combined buffer from scratch.

Note: ExtendCrc32c with an initial_crc of 0 is equivalent to ComputeCrc32c.

This operation has a runtime cost of O(buf_to_add.size())

Return Value

The CRC32C value of the combined buffer.

Parameters

Name

Description

initial_crc

The CRC32C value of the bytes already processed.

buf_to_add

The additional bytes to include in the checksum.

Created with MrDocs