mirror of
https://github.com/scylladb/scylladb.git
synced 2026-05-31 03:56:42 +00:00
fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
33 lines
709 B
C++
33 lines
709 B
C++
/*
|
|
* Copyright (C) 2018-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: AGPL-3.0-or-later
|
|
*
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <sys/types.h>
|
|
#include <memory>
|
|
|
|
/*
|
|
* Computes CRC32 (gzip format, RFC 1952) of a compound bitstream M composed by
|
|
* concatenating bitstream A (first) and bitstream B (second), where:
|
|
*
|
|
* - crc is the CRC32 of bitstream A
|
|
* - crc2 is the CRC32 of bitstream B
|
|
* - len2 is length of bitstream B in bytes
|
|
*/
|
|
uint32_t fast_crc32_combine(uint32_t crc, uint32_t crc2, ssize_t len2);
|
|
|
|
static constexpr bool fast_crc32_combine_optimized() {
|
|
#if defined(__x86_64__) || defined(__i386__) || defined(__aarch64__)
|
|
return true;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|