| // Copyright (C) 2011 Milo Yip |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| #ifndef RAPIDJSON_FILEWRITESTREAM_H_ |
| #define RAPIDJSON_FILEWRITESTREAM_H_ |
| |
| #include "rapidjson.h" |
| #include <cstdio> |
| |
| RAPIDJSON_NAMESPACE_BEGIN |
| |
| //! Wrapper of C file stream for input using fread(). |
| /*! |
| \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_) { |
| fwrite(buffer_, 1, static_cast<size_t>(current_ - buffer_), fp_); |
| 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 |
| |
| #endif // RAPIDJSON_FILESTREAM_H_ |