diff options
Diffstat (limited to 'src/crc32c/include')
-rw-r--r-- | src/crc32c/include/crc32c/crc32c.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/crc32c/include/crc32c/crc32c.h b/src/crc32c/include/crc32c/crc32c.h new file mode 100644 index 0000000000..e8a78170a9 --- /dev/null +++ b/src/crc32c/include/crc32c/crc32c.h @@ -0,0 +1,89 @@ +/* Copyright 2017 The CRC32C Authors. All rights reserved. + Use of this source code is governed by a BSD-style license that can be + found in the LICENSE file. See the AUTHORS file for names of contributors. */ + +#ifndef CRC32C_CRC32C_H_ +#define CRC32C_CRC32C_H_ + +/* The API exported by the CRC32C project. */ + +#if defined(__cplusplus) + +#include <cstddef> +#include <cstdint> +#include <string> + +#else /* !defined(__cplusplus) */ + +#include <stddef.h> +#include <stdint.h> + +#endif /* !defined(__cplusplus) */ + + +/* The C API. */ + +#if defined(__cplusplus) +extern "C" { +#endif /* defined(__cplusplus) */ + +/* Extends "crc" with the CRC32C of "count" bytes in the buffer pointed by + "data" */ +uint32_t crc32c_extend(uint32_t crc, const uint8_t* data, size_t count); + +/* Computes the CRC32C of "count" bytes in the buffer pointed by "data". */ +uint32_t crc32c_value(const uint8_t* data, size_t count); + +#ifdef __cplusplus +} /* end extern "C" */ +#endif /* defined(__cplusplus) */ + + +/* The C++ API. */ + +#if defined(__cplusplus) + +namespace crc32c { + +// Extends "crc" with the CRC32C of "count" bytes in the buffer pointed by +// "data". +uint32_t Extend(uint32_t crc, const uint8_t* data, size_t count); + +// Computes the CRC32C of "count" bytes in the buffer pointed by "data". +inline uint32_t Crc32c(const uint8_t* data, size_t count) { + return Extend(0, data, count); +} + +// Computes the CRC32C of "count" bytes in the buffer pointed by "data". +inline uint32_t Crc32c(const char* data, size_t count) { + return Extend(0, reinterpret_cast<const uint8_t*>(data), count); +} + +// Computes the CRC32C of the string's content. +inline uint32_t Crc32c(const std::string& string) { + return Crc32c(reinterpret_cast<const uint8_t*>(string.data()), + string.size()); +} + +} // namespace crc32c + +#if __cplusplus > 201402L +#if __has_include(<string_view>) +#include <string_view> + +namespace crc32c { + +// Computes the CRC32C of the bytes in the string_view. +inline uint32_t Crc32c(const std::string_view& string_view) { + return Crc32c(reinterpret_cast<const uint8_t*>(string_view.data()), + string_view.size()); +} + +} // namespace crc32c + +#endif // __has_include(<string_view>) +#endif // __cplusplus > 201402L + +#endif /* defined(__cplusplus) */ + +#endif // CRC32C_CRC32C_H_ |