/*
* Copyright 2017 WebAssembly Community Group participants
*
* 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 WABT_LEB128_H_
#define WABT_LEB128_H_
#include <cstdint>
#include "wabt/common.h"
namespace wabt {
class Stream;
// Returns the length of the leb128.
Offset U32Leb128Length(uint32_t value);
void WriteU32Leb128(Stream* stream, uint32_t value,
const char* desc);
void WriteS32Leb128(Stream* stream, uint32_t value,
const char* desc);
void WriteU64Leb128(Stream* stream, uint64_t value,
const char* desc);
void WriteS64Leb128(Stream* stream, uint64_t value,
const char* desc);
void WriteFixedS32Leb128(Stream* stream, uint32_t value,
const char* desc);
void WriteFixedU32Leb128(Stream* stream, uint32_t value,
const char* desc);
Offset WriteU32Leb128At(Stream* stream,
Offset offset,
uint32_t value,
const char* desc);
Offset WriteFixedU32Leb128At(Stream* stream,
Offset offset,
uint32_t value,
const char* desc);
Offset WriteU32Leb128Raw(uint8_t* data, uint8_t* end, uint32_t value);
Offset WriteFixedU32Leb128Raw(uint8_t* data, uint8_t* end, uint32_t value);
// Convenience functions for writing enums as LEB128s.
template <
typename T>
void WriteU32Leb128(Stream* stream, T value,
const char* desc) {
WriteU32Leb128(stream,
static_cast<uint32_t>(value), desc);
}
template <
typename T>
void WriteS32Leb128(Stream* stream, T value,
const char* desc) {
WriteS32Leb128(stream,
static_cast<uint32_t>(value), desc);
}
// Returns the length of the leb128.
size_t ReadU32Leb128(
const uint8_t* p,
const uint8_t* end, uint32_t* out_value);
size_t ReadU64Leb128(
const uint8_t* p,
const uint8_t* end, uint64_t* out_value);
size_t ReadS32Leb128(
const uint8_t* p,
const uint8_t* end, uint32_t* out_value);
size_t ReadS64Leb128(
const uint8_t* p,
const uint8_t* end, uint64_t* out_value);
}
// namespace wabt
#endif // WABT_LEB128_H_
