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/*
   Copyright (C) 1998 T. Scott Dattalo

This file is part of the libgpsim library of gpsim

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, see 
<http://www.gnu.org/licenses/lgpl-2.1.html>.
*/

#if !defined(__HEXUTILS_H__)
#define __HEXUTILS_H__

#include "program_files.h"


/*
 *  IntelHexProgramFileType
 *  Note that the code is in hexutils.cc
 *
 */

class IntelHexProgramFileType : public ProgramFileType {
public:
  IntelHexProgramFileType();
  int readihex16 (Processor *pProcessor, FILE * file);
  inline void writeihex16(Register **fr, gint32 size, FILE *file, gint32 offset)
	{ writeihexN(2, fr, size, file, offset); }
  inline void writeihex8(Register **fr, gint32 size, FILE *file, gint32 offset)
	{ writeihexN(1, fr, size, file, offset); }

  inline int readihex16(Register **fr, gint32 size, FILE *file, gint32 offset)
	{ return readihexN(2, fr, size, file, offset); }
  inline int readihex8(Register **fr, gint32 size, FILE *file, gint32 offset)
	{ return readihexN(1, fr, size, file, offset); }


  // ProgramFileType overrides
  virtual int  LoadProgramFile(Processor **pProcessor, const char *pFilename,
                               FILE *pFile, const char *pProcessorName);
private:
  unsigned char checksum;
  bool isBigEndian;

  int           getachar (FILE * file);
  unsigned char getbyte  (FILE * file);
  unsigned int  getword  (FILE *file);
  void putachar (FILE * file, unsigned char c);
  void write_be_word(FILE * file, int w);
  void write_le_word(FILE * file, int w);
  int read_be_word(FILE * file);
  int read_le_word(FILE * file);
  // Compute checksum for extended address record
  inline int ext_csum(gint32 add) { 
	return ((-(6 + (add & 0xff) + ((add >> 8) & 0xff)) & 0xff));
  }
  void writeihexN(int bytes_per_word, Register **fr, gint32 size, FILE *file, gint32 out_base);
  int readihexN (int bytes_per_word, Register **fr, gint32 size, FILE * file, gint32 offset);
  // The following do the same function of ntohs and htons
  // these save having to include networking includes
  inline int ntoh16(int w) { return isBigEndian ? w : ((w >> 8) & 0xff) | ((w & 0xff) << 8);}
  inline int hton16(int w) { return isBigEndian ? w : ((w >> 8) & 0xff) | ((w & 0xff) << 8);}

};



#endif // __HEXUTILS_H__