rapidjson/include/rapidjson/filestream.h

#ifndef RAPIDJSON_FILESTREAM_H_
#define RAPIDJSON_FILESTREAM_H_

#include "rapidjson.h"
#include <cstdio>

namespace rapidjson {

//! (Depreciated) Wrapper of C file stream for input or output.
/*!
	This simple wrapper does not check the validity of the stream.
	\note implements Stream concept
	\note deprecated: This was only for basic testing in version 0.1, it is found that the performance is very low by using fgetc(). Use FileReadStream instead.
*/
class FileStream {
public:
	typedef char Ch;	//!< Character type. Only support char.

	FileStream(FILE* fp) : fp_(fp), current_('\0'), count_(0) { Read(); }
	char Peek() const { return current_; }
	char Take() { char c = current_; Read(); return c; }
	size_t Tell() const { return count_; }
	void Put(char c) { fputc(c, fp_); }
	void Flush() { fflush(fp_); }

	// Not implemented
	char* PutBegin() { return 0; }
	size_t PutEnd(char*) { return 0; }

private:
	// Prohibit copy constructor & assignment operator.
	FileStream(const FileStream&);
	FileStream& operator=(const FileStream&);

	void Read() {
		RAPIDJSON_ASSERT(fp_ != 0);
		int c = fgetc(fp_);
		if (c != EOF) {
			current_ = (char)c;
			count_++;
		}
		else if (current_ != '\0')
			current_ = '\0';
	}

	FILE* fp_;
	char current_;
	size_t count_;
};

} // namespace rapidjson

#endif // RAPIDJSON_FILESTREAM_H_