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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
#define ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
#include <stdint.h>
#include <endian.h>
#include <vector>
#include <cstring>
namespace art {
template<typename T>
inline void AppendBytes(std::vector<uint8_t>& bytes, T data) {
size_t size = bytes.size();
bytes.resize(size + sizeof(T));
memcpy(bytes.data() + size, &data, sizeof(T));
}
inline void Append1BE(std::vector<uint8_t>& bytes, uint8_t value) {
bytes.push_back(value);
}
inline void Append2BE(std::vector<uint8_t>& bytes, uint16_t value) {
AppendBytes<uint16_t>(bytes, htobe16(value));
}
inline void Append4BE(std::vector<uint8_t>& bytes, uint32_t value) {
AppendBytes<uint32_t>(bytes, htobe32(value));
}
inline void Append8BE(std::vector<uint8_t>& bytes, uint64_t value) {
AppendBytes<uint64_t>(bytes, htobe64(value));
}
inline void AppendUtf16BE(std::vector<uint8_t>& bytes, const uint16_t* chars, size_t char_count) {
Append4BE(bytes, char_count);
for (size_t i = 0; i < char_count; ++i) {
Append2BE(bytes, chars[i]);
}
}
inline void AppendUtf16CompressedBE(std::vector<uint8_t>& bytes,
const uint8_t* chars,
size_t char_count) {
Append4BE(bytes, char_count);
for (size_t i = 0; i < char_count; ++i) {
Append2BE(bytes, static_cast<uint16_t>(chars[i]));
}
}
template <typename T>
inline void SetBytes(uint8_t* buf, T val) {
memcpy(buf, &val, sizeof(T));
}
inline void Set1(uint8_t* buf, uint8_t val) {
*buf = val;
}
inline void Set2BE(uint8_t* buf, uint16_t val) {
SetBytes<uint16_t>(buf, htobe16(val));
}
inline void Set4BE(uint8_t* buf, uint32_t val) {
SetBytes<uint32_t>(buf, htobe32(val));
}
inline void Set8BE(uint8_t* buf, uint64_t val) {
SetBytes<uint64_t>(buf, htobe64(val));
}
inline void Write1BE(uint8_t** dst, uint8_t value) {
Set1(*dst, value);
*dst += sizeof(value);
}
inline void Write2BE(uint8_t** dst, uint16_t value) {
Set2BE(*dst, value);
*dst += sizeof(value);
}
inline void Write4BE(uint8_t** dst, uint32_t value) {
Set4BE(*dst, value);
*dst += sizeof(value);
}
inline void Write8BE(uint8_t** dst, uint64_t value) {
Set8BE(*dst, value);
*dst += sizeof(value);
}
} // namespace art
#endif // ART_LIBARTBASE_BASE_ENDIAN_UTILS_H_
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