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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef BYTE_WRITER_H_
#define BYTE_WRITER_H_
#include "mozilla/EndianUtils.h"
#include "nsTArray.h"
namespace mozilla {
template <typename Endianess>
class ByteWriter {
explicit ByteWriter(nsTArray<uint8_t>& aData) : mPtr(aData) {}
~ByteWriter() = default;
[[nodiscard]] bool WriteU8(uint8_t aByte) { return Write(&aByte, 1); }
[[nodiscard]] bool WriteU16(uint16_t aShort) {
uint8_t c[2];
Endianess::writeUint16(&c[0], aShort);
return Write(&c[0], 2);
[[nodiscard]] bool WriteU32(uint32_t aLong) {
uint8_t c[4];
Endianess::writeUint32(&c[0], aLong);
return Write(&c[0], 4);
[[nodiscard]] bool Write32(int32_t aLong) {
uint8_t c[4];
Endianess::writeInt32(&c[0], aLong);
return Write(&c[0], 4);
[[nodiscard]] bool WriteU64(uint64_t aLongLong) {
uint8_t c[8];
Endianess::writeUint64(&c[0], aLongLong);
return Write(&c[0], 8);
[[nodiscard]] bool Write64(int64_t aLongLong) {
uint8_t c[8];
Endianess::writeInt64(&c[0], aLongLong);
return Write(&c[0], 8);
[[nodiscard]] bool Write(const uint8_t* aSrc, size_t aCount) {
return mPtr.AppendElements(aSrc, aCount, mozilla::fallible);
nsTArray<uint8_t>& mPtr;
} // namespace mozilla