FileInputStream.h

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#ifndef __DCL_FILE_INPUT_STREAM_H__
#define __DCL_FILE_INPUT_STREAM_H__ 20071009
 
#ifndef __DCL_INPUT_STREAM_H__
#include <dcl/InputStream.h>
#endif
#ifndef __DCL_FILE_H__
#include <dcl/File.h>
#endif
 
__DCL_BEGIN_NAMESPACE

class DCLCAPI FileInputStream : public InputStream
{
    DECLARE_CLASSINFO(FileInputStream)
public:
    virtual String toString() const;

    FileInputStream(const String& _path)
            __DCL_THROWS1(IOException*);
 
#ifdef _MSC_VER
    FileInputStream(const wchar_t* _path)
            __DCL_THROWS1(IOException*);
#endif

    FileInputStream(File& __noclose__ _file)
            __DCL_THROWS1(IOException*);

    FileInputStream(File::HandleType __noclose__ _handle)
            __DCL_THROWS1(IOException*);

    void open(const String& _path)
            __DCL_THROWS1(IOException*);

    virtual ~FileInputStream();

    virtual void close()
            __DCL_THROWS1(IOException*);

    virtual size_t available()
            __DCL_THROWS1(IOException*);
#if 0
    virtual size_t peek(void* p, size_t n)
            __DCL_THROWS1(IOException*);
#endif
    /*
     * 스트림으로부터 데이터를 읽는다.
     * @param _buf
     *          버퍼
     * @param _n
     *          버퍼의 크기가 _n바이트
     * @return
     *          읽은 바이트의 수이다. 0이면 EOF이다.
     */
    virtual size_t read(void* _buf, size_t _n) 
            __DCL_THROWS1(IOException*);
 
protected:
    File*       __file;
    bool        __closeDestroy;
 
    byte_t*       __buf;
    size_t      __bufSize;
    const byte_t* __cacheStart;
    size_t      __cacheSize;
 
    void init(File* _pFile);
            __DCL_THROWS1(IOException*);
};
 
__DCL_END_NAMESPACE
 
#endif  // __DCL_FILE_INPUT_STREAM_H__