1 /*
2 * Copyright 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
18 #define ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
19
20 #include <stdint.h>
21 #include <endian.h>
22 #include <vector>
23
24 namespace art {
25
26 template<typename T>
AppendBytes(std::vector<uint8_t> & bytes,T data)27 inline void AppendBytes(std::vector<uint8_t>& bytes, T data) {
28 size_t size = bytes.size();
29 bytes.resize(size + sizeof(T));
30 memcpy(bytes.data() + size, &data, sizeof(T));
31 }
32
Append1BE(std::vector<uint8_t> & bytes,uint8_t value)33 inline void Append1BE(std::vector<uint8_t>& bytes, uint8_t value) {
34 bytes.push_back(value);
35 }
36
Append2BE(std::vector<uint8_t> & bytes,uint16_t value)37 inline void Append2BE(std::vector<uint8_t>& bytes, uint16_t value) {
38 AppendBytes<uint16_t>(bytes, htobe16(value));
39 }
40
Append4BE(std::vector<uint8_t> & bytes,uint32_t value)41 inline void Append4BE(std::vector<uint8_t>& bytes, uint32_t value) {
42 AppendBytes<uint32_t>(bytes, htobe32(value));
43 }
44
Append8BE(std::vector<uint8_t> & bytes,uint64_t value)45 inline void Append8BE(std::vector<uint8_t>& bytes, uint64_t value) {
46 AppendBytes<uint64_t>(bytes, htobe64(value));
47 }
48
AppendUtf16BE(std::vector<uint8_t> & bytes,const uint16_t * chars,size_t char_count)49 inline void AppendUtf16BE(std::vector<uint8_t>& bytes, const uint16_t* chars, size_t char_count) {
50 Append4BE(bytes, char_count);
51 for (size_t i = 0; i < char_count; ++i) {
52 Append2BE(bytes, chars[i]);
53 }
54 }
55
AppendUtf16CompressedBE(std::vector<uint8_t> & bytes,const uint8_t * chars,size_t char_count)56 inline void AppendUtf16CompressedBE(std::vector<uint8_t>& bytes,
57 const uint8_t* chars,
58 size_t char_count) {
59 Append4BE(bytes, char_count);
60 for (size_t i = 0; i < char_count; ++i) {
61 Append2BE(bytes, static_cast<uint16_t>(chars[i]));
62 }
63 }
64
65 template <typename T>
SetBytes(uint8_t * buf,T val)66 inline void SetBytes(uint8_t* buf, T val) {
67 memcpy(buf, &val, sizeof(T));
68 }
69
Set1(uint8_t * buf,uint8_t val)70 inline void Set1(uint8_t* buf, uint8_t val) {
71 *buf = val;
72 }
73
Set2BE(uint8_t * buf,uint16_t val)74 inline void Set2BE(uint8_t* buf, uint16_t val) {
75 SetBytes<uint16_t>(buf, htobe16(val));
76 }
77
Set4BE(uint8_t * buf,uint32_t val)78 inline void Set4BE(uint8_t* buf, uint32_t val) {
79 SetBytes<uint32_t>(buf, htobe32(val));
80 }
81
Set8BE(uint8_t * buf,uint64_t val)82 inline void Set8BE(uint8_t* buf, uint64_t val) {
83 SetBytes<uint64_t>(buf, htobe64(val));
84 }
85
Write1BE(uint8_t ** dst,uint8_t value)86 inline void Write1BE(uint8_t** dst, uint8_t value) {
87 Set1(*dst, value);
88 *dst += sizeof(value);
89 }
90
Write2BE(uint8_t ** dst,uint16_t value)91 inline void Write2BE(uint8_t** dst, uint16_t value) {
92 Set2BE(*dst, value);
93 *dst += sizeof(value);
94 }
95
Write4BE(uint8_t ** dst,uint32_t value)96 inline void Write4BE(uint8_t** dst, uint32_t value) {
97 Set4BE(*dst, value);
98 *dst += sizeof(value);
99 }
100
Write8BE(uint8_t ** dst,uint64_t value)101 inline void Write8BE(uint8_t** dst, uint64_t value) {
102 Set8BE(*dst, value);
103 *dst += sizeof(value);
104 }
105
106 } // namespace art
107
108 #endif // ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
109