1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
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_
|
