filestream.h

#ifndef RAPIDJSON_FILESTREAM_H_
#define RAPIDJSON_FILESTREAM_H_

#include <cstdio>

namespace rapidjson {

//! Wrapper of C file stream for input or output.
/*!
        This simple wrapper does not check the validity of the stream.
        \implements Stream
*/
class FileStream {
public:
        typedef char Ch;        //!< Character type. Only support char.

        FileStream(FILE* fp) : fp_(fp), 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_); }

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

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

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

} // namespace rapidjson

#endif // RAPIDJSON_FILESTREAM_H_