#ifndef _COLORER_MEMORYFILE_H_
#define _COLORER_MEMORYFILE_H_
#include<contrib/minizip/unzip.h>

typedef struct{
  const unsigned char *stream;
  int length;
  int pointer;
  int error;
} MemoryFile;

voidpf ZCALLBACK mem_open_file_func (voidpf opaque, const char *filename, int mode)
{
  MemoryFile *mf = (MemoryFile*)opaque;
  mf->error = 0;
  mf->pointer = 0;
  return (voidpf)0x666888;
}

uLong ZCALLBACK mem_read_file_func (voidpf opaque, voidpf stream, void *buf, uLong size){

  MemoryFile *mf = (MemoryFile*)opaque;

  if (mf->pointer+(int)size > mf->length) size = mf->length - mf->pointer;
  memmove(buf, mf->stream+mf->pointer, size);
  mf->pointer += size;
  return size;
};


uLong ZCALLBACK mem_write_file_func (voidpf opaque, voidpf stream, const void *buf, uLong size)
{
  MemoryFile *mf = (MemoryFile*)opaque;
  return 0;
}

long ZCALLBACK mem_tell_file_func (voidpf opaque, voidpf stream)
{
  MemoryFile *mf = (MemoryFile*)opaque;
  return mf->pointer;
}

long ZCALLBACK mem_seek_file_func (voidpf opaque, voidpf stream, uLong offset, int origin)
{
  MemoryFile *mf = (MemoryFile*)opaque;
  int cpointer;

  switch (origin){
    case ZLIB_FILEFUNC_SEEK_CUR :
      cpointer = mf->pointer;
      cpointer += offset;
      if (cpointer > mf->length) return -1;
      mf->pointer = cpointer;
      break;
    case ZLIB_FILEFUNC_SEEK_END :
      cpointer = mf->length;
      cpointer += offset;
      if (cpointer > mf->length) return -1;
      mf->pointer = cpointer;
      break;
    case ZLIB_FILEFUNC_SEEK_SET :
      cpointer = 0;
      cpointer += offset;
      if (cpointer > mf->length) return -1;
      mf->pointer = cpointer;
      break;
    default:
      return -1;
  };
  return 0;
}

int ZCALLBACK mem_close_file_func (voidpf opaque, voidpf stream)
{
  return 0;
}

int ZCALLBACK mem_error_file_func (voidpf opaque, voidpf stream)
{
  MemoryFile *mf = (MemoryFile*)opaque;
  return mf->error;
}

void fill_mem_filefunc (zlib_filefunc_def*  pzlib_filefunc_def, MemoryFile *source)
{
  pzlib_filefunc_def->opaque = source;

  pzlib_filefunc_def->zopen_file = mem_open_file_func;
  pzlib_filefunc_def->zread_file = mem_read_file_func;
  pzlib_filefunc_def->zwrite_file = mem_write_file_func;
  pzlib_filefunc_def->ztell_file = mem_tell_file_func;
  pzlib_filefunc_def->zseek_file = mem_seek_file_func;
  pzlib_filefunc_def->zclose_file = mem_close_file_func;
  pzlib_filefunc_def->zerror_file = mem_error_file_func;
}

#endif
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Colorer Library.
 *
 * The Initial Developer of the Original Code is
 * Cail Lomecb <cail@nm.ru>.
 * Portions created by the Initial Developer are Copyright (C) 1999-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */