ZSNES/zsnes/src/jma/iiostrm.h

/*
Copyright (C) 2005 NSRT Team ( http://nsrt.edgeemu.com )
Copyright (C) 2002 Andrea Mazzoleni ( http://advancemame.sf.net )
Copyright (C) 2001-4 Igor Pavlov ( http://www.7-zip.org )

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef __IINOUTSTREAMS_H
#define __IINOUTSTREAMS_H

#include <string>
#include <fstream>

#include "portable.h"


class ISequentialInStream
{
public:
  virtual HRESULT Read(void *, UINT32, UINT32 *) = 0;
};


class ISequentialInStream_Array : public ISequentialInStream
{
  const char *data;
  unsigned int size;
public:
  ISequentialInStream_Array(const char *Adata, unsigned Asize) : data(Adata), size(Asize) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialInStream_String : public ISequentialInStream
{
  std::string& data;
public:
  ISequentialInStream_String(std::string& Adata) : data(Adata) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialInStream_Istream : public ISequentialInStream
{
  std::istream& data;
public:
  ISequentialInStream_Istream(std::istream& Adata) : data(Adata) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};



class ISequentialOutStream
{
public:
  virtual bool overflow_get() const = 0;
  virtual unsigned int size_get() const = 0;

  virtual HRESULT Write(const void *, UINT32, UINT32 *) = 0;
};


class ISequentialOutStream_Array : public ISequentialOutStream
{
  char *data;
  unsigned int size;
  bool overflow;
  unsigned int total;
public:
  ISequentialOutStream_Array(char *Adata, unsigned Asize) : data(Adata), size(Asize), overflow(false), total(0) { }

  bool overflow_get() const { return(overflow); }
  unsigned int size_get() const { return(total); }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialOutStream_String : public ISequentialOutStream
{
  std::string& data;
  unsigned int total;
public:
  ISequentialOutStream_String(std::string& Adata) : data(Adata), total(0) { }

  bool overflow_get() const { return(false); }
  unsigned int size_get() const { return(total); }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};


class ISequentialOutStream_Ostream : public ISequentialOutStream
{
  std::ostream& data;
  unsigned int total;
public:
  ISequentialOutStream_Ostream(std::ostream& Adata) : data(Adata), total(0) { }

  bool overflow_get() const { return(false); }
  unsigned int size_get() const { return(total); }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};



class ISequentialStreamCRC32
{
protected:
  unsigned int crc32;
public:
  ISequentialStreamCRC32() : crc32(0) {}
  unsigned int crc32_get() const { return(crc32); }
};


class ISequentialInStreamCRC32_Array : public ISequentialInStream_Array, public ISequentialStreamCRC32
{
public:
  ISequentialInStreamCRC32_Array(const char *Adata, unsigned Asize) : ISequentialInStream_Array(Adata, Asize) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialInStreamCRC32_String : public ISequentialInStream_String, public ISequentialStreamCRC32
{
public:
  ISequentialInStreamCRC32_String(std::string& Adata) : ISequentialInStream_String(Adata) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialInStreamCRC32_Istream : public ISequentialInStream_Istream, public ISequentialStreamCRC32
{
public:
  ISequentialInStreamCRC32_Istream(std::istream& Adata) : ISequentialInStream_Istream(Adata) { }

  HRESULT Read(void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};


class ISequentialOutStreamCRC32_Array : public ISequentialOutStream_Array, public ISequentialStreamCRC32
{
public:
  ISequentialOutStreamCRC32_Array(char *Adata, unsigned Asize) : ISequentialOutStream_Array(Adata, Asize) { }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

class ISequentialOutStreamCRC32_String : public ISequentialOutStream_String, public ISequentialStreamCRC32
{
public:
  ISequentialOutStreamCRC32_String(std::string& Adata) : ISequentialOutStream_String(Adata) { }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};


class ISequentialOutStreamCRC32_Ostream : public ISequentialOutStream_Ostream, public ISequentialStreamCRC32
{
public:
  ISequentialOutStreamCRC32_Ostream(std::ostream& Adata) : ISequentialOutStream_Ostream(Adata) { }

  HRESULT Write(const void *aData, UINT32 aSize, UINT32 *aProcessedSize);
};

#endif