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1 | /* |
2 | * This file is open source software, licensed to you under the terms | |
3 | * of the Apache License, Version 2.0 (the "License"). See the NOTICE file | |
4 | * distributed with this work for additional information regarding copyright | |
5 | * ownership. You may not use this file except in compliance with the License. | |
6 | * | |
7 | * You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, | |
12 | * software distributed under the License is distributed on an | |
13 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
14 | * KIND, either express or implied. See the License for the | |
15 | * specific language governing permissions and limitations | |
16 | * under the License. | |
17 | */ | |
18 | /* | |
19 | * Copyright (C) 2015 Scylladb, Ltd. | |
20 | */ | |
21 | ||
22 | #pragma once | |
23 | ||
24 | #include <algorithm> | |
1e59de90 | 25 | #include <boost/endian/conversion.hpp> |
11fdf7f2 TL |
26 | #include <seastar/core/unaligned.hh> |
27 | ||
28 | namespace seastar { | |
29 | ||
1e59de90 TL |
30 | template <typename T> |
31 | inline T cpu_to_le(T x) noexcept { | |
32 | return boost::endian::native_to_little(x); | |
33 | } | |
34 | template <typename T> | |
35 | inline T le_to_cpu(T x) noexcept { | |
36 | return boost::endian::little_to_native(x); | |
37 | } | |
f67539c2 | 38 | |
1e59de90 TL |
39 | template <typename T> |
40 | inline T cpu_to_be(T x) noexcept { | |
41 | return boost::endian::native_to_big(x); | |
42 | } | |
43 | template <typename T> | |
44 | inline T be_to_cpu(T x) noexcept { | |
45 | return boost::endian::big_to_native(x); | |
46 | } | |
11fdf7f2 TL |
47 | |
48 | template <typename T> | |
f67539c2 | 49 | inline T cpu_to_le(const unaligned<T>& v) noexcept { |
11fdf7f2 TL |
50 | return cpu_to_le(T(v)); |
51 | } | |
52 | ||
53 | template <typename T> | |
f67539c2 | 54 | inline T le_to_cpu(const unaligned<T>& v) noexcept { |
11fdf7f2 TL |
55 | return le_to_cpu(T(v)); |
56 | } | |
57 | ||
58 | template <typename T> | |
59 | inline | |
60 | T | |
f67539c2 | 61 | read_le(const char* p) noexcept { |
11fdf7f2 TL |
62 | T datum; |
63 | std::copy_n(p, sizeof(T), reinterpret_cast<char*>(&datum)); | |
64 | return le_to_cpu(datum); | |
65 | } | |
66 | ||
67 | template <typename T> | |
68 | inline | |
69 | void | |
f67539c2 | 70 | write_le(char* p, T datum) noexcept { |
11fdf7f2 TL |
71 | datum = cpu_to_le(datum); |
72 | std::copy_n(reinterpret_cast<const char*>(&datum), sizeof(T), p); | |
73 | } | |
74 | ||
75 | template <typename T> | |
76 | inline | |
77 | T | |
f67539c2 | 78 | read_be(const char* p) noexcept { |
11fdf7f2 TL |
79 | T datum; |
80 | std::copy_n(p, sizeof(T), reinterpret_cast<char*>(&datum)); | |
81 | return be_to_cpu(datum); | |
82 | } | |
83 | ||
84 | template <typename T> | |
85 | inline | |
86 | void | |
f67539c2 | 87 | write_be(char* p, T datum) noexcept { |
11fdf7f2 TL |
88 | datum = cpu_to_be(datum); |
89 | std::copy_n(reinterpret_cast<const char*>(&datum), sizeof(T), p); | |
90 | } | |
91 | ||
92 | template <typename T> | |
93 | inline | |
94 | T | |
f67539c2 | 95 | consume_be(const char*& p) noexcept { |
11fdf7f2 TL |
96 | auto ret = read_be<T>(p); |
97 | p += sizeof(T); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | template <typename T> | |
102 | inline | |
103 | void | |
f67539c2 | 104 | produce_be(char*& p, T datum) noexcept { |
11fdf7f2 TL |
105 | write_be<T>(p, datum); |
106 | p += sizeof(T); | |
107 | } | |
108 | ||
109 | } |