#ifndef NW4R_UT_CHAR_STRM_READER_H
#define NW4R_UT_CHAR_STRM_READER_H
#include "nw4r/types_nw4r.h"

namespace nw4r {
namespace ut {

class CharStrmReader {
public:
    typedef u16 (CharStrmReader::*ReadFunc)();

    CharStrmReader(ReadFunc func) : mCharStrm(NULL), mReadFunc(func) {}
    ~CharStrmReader() {}

    u16 ReadNextCharUTF8();
    u16 ReadNextCharUTF16();
    u16 ReadNextCharCP1252();
    u16 ReadNextCharSJIS();

    const void *GetCurrentPos() const {
        return mCharStrm;
    }

    template <typename T>
    T GetChar(int offset) const {
        return static_cast<const T *>(mCharStrm)[offset];
    }

    template <typename T>
    void StepStrm(int offset) {
        static_cast<const T *>(mCharStrm) += offset;
    }

    u16 Next() {
        return (this->*mReadFunc)();
    }

    void Set(const char *strm) {
        mCharStrm = strm;
    }
    void Set(const wchar_t *strm) {
        mCharStrm = strm;
    }

private:
    const void *mCharStrm; // at 0x0
    ReadFunc mReadFunc;    // at 0x4
};

} // namespace ut
} // namespace nw4r

#endif
