mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-27 16:15:41 +00:00
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
// Tencent is pleased to support the open source community by making RapidJSON available.
|
|
//
|
|
// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
|
|
//
|
|
// Licensed under the MIT License (the "License"); you may not use this file except
|
|
// in compliance with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://opensource.org/licenses/MIT
|
|
//
|
|
// 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 RAPIDJSON_FILEWRITESTREAM_H_
|
|
#define RAPIDJSON_FILEWRITESTREAM_H_
|
|
|
|
#include "stream.h"
|
|
#include <cstdio>
|
|
|
|
#ifdef __clang__
|
|
RAPIDJSON_DIAG_PUSH
|
|
RAPIDJSON_DIAG_OFF(unreachable-code)
|
|
#endif
|
|
|
|
RAPIDJSON_NAMESPACE_BEGIN
|
|
|
|
//! Wrapper of C file stream for output using fwrite().
|
|
/*!
|
|
\note implements Stream concept
|
|
*/
|
|
class FileWriteStream {
|
|
public:
|
|
typedef char Ch; //!< Character type. Only support char.
|
|
|
|
FileWriteStream(std::FILE* fp, char* buffer, size_t bufferSize) : fp_(fp), buffer_(buffer), bufferEnd_(buffer + bufferSize), current_(buffer_) {
|
|
RAPIDJSON_ASSERT(fp_ != 0);
|
|
}
|
|
|
|
void Put(char c) {
|
|
if (current_ >= bufferEnd_)
|
|
Flush();
|
|
|
|
*current_++ = c;
|
|
}
|
|
|
|
void PutN(char c, size_t n) {
|
|
size_t avail = static_cast<size_t>(bufferEnd_ - current_);
|
|
while (n > avail) {
|
|
std::memset(current_, c, avail);
|
|
current_ += avail;
|
|
Flush();
|
|
n -= avail;
|
|
avail = static_cast<size_t>(bufferEnd_ - current_);
|
|
}
|
|
|
|
if (n > 0) {
|
|
std::memset(current_, c, n);
|
|
current_ += n;
|
|
}
|
|
}
|
|
|
|
void Flush() {
|
|
if (current_ != buffer_) {
|
|
size_t result = std::fwrite(buffer_, 1, static_cast<size_t>(current_ - buffer_), fp_);
|
|
if (result < static_cast<size_t>(current_ - buffer_)) {
|
|
// failure deliberately ignored at this time
|
|
// added to avoid warn_unused_result build errors
|
|
}
|
|
current_ = buffer_;
|
|
}
|
|
}
|
|
|
|
// Not implemented
|
|
char Peek() const { RAPIDJSON_ASSERT(false); return 0; }
|
|
char Take() { RAPIDJSON_ASSERT(false); return 0; }
|
|
size_t Tell() const { RAPIDJSON_ASSERT(false); return 0; }
|
|
char* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
|
|
size_t PutEnd(char*) { RAPIDJSON_ASSERT(false); return 0; }
|
|
|
|
private:
|
|
// Prohibit copy constructor & assignment operator.
|
|
FileWriteStream(const FileWriteStream&);
|
|
FileWriteStream& operator=(const FileWriteStream&);
|
|
|
|
std::FILE* fp_;
|
|
char *buffer_;
|
|
char *bufferEnd_;
|
|
char *current_;
|
|
};
|
|
|
|
//! Implement specialized version of PutN() with memset() for better performance.
|
|
template<>
|
|
inline void PutN(FileWriteStream& stream, char c, size_t n) {
|
|
stream.PutN(c, n);
|
|
}
|
|
|
|
RAPIDJSON_NAMESPACE_END
|
|
|
|
#ifdef __clang__
|
|
RAPIDJSON_DIAG_POP
|
|
#endif
|
|
|
|
#endif // RAPIDJSON_FILESTREAM_H_
|