/*  Glue functions for the minIni library, based on the EFS Library, see
 *  http://www.efsl.be/
 *
 *  Copyright (c) ITB CompuPhase, 2008-2009
 *
 *  Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 *  License for the specific language governing permissions and limitations
 *  under the License.
 */

#define INI_BUFFERSIZE  256       /* maximum line length, maximum path length */

#include "efs.h"
#define INI_FILETYPE    EmbeddedFile
#define INI_LINETERM    "\r\n"    /* set line termination explicitly */


extern EmbeddedFileSystem g_efs;

#define ini_openread(filename,file)   (file_fopen((file),&g_efs.myFs,(char*)(filename),'r') == 0)
#define ini_openwrite(filename,file)  (file_fopen((file),&g_efs.myFs,(char*)(filename),'w') == 0)
#define ini_close(file)               file_fclose(file)
#define ini_read(buffer,size,file)    (file_read((file),(size),(buffer)) > 0)
#define ini_write(buffer,file)        file_write((file),strlen(buffer),(char*)(buffer))
#define ini_remove(filename)          rmfile(&g_efs.myFs,(char*)(filename))
#define ini_rewind(file)              file_setpos(*(file),0)

/* EFSL lacks a rename function, so instead we copy the file to the new name
 * and delete the old file
 */
static int ini_rename(char *source, const char *dest)
{
  EmbeddedFile fr, fw;
  int n;

  if (file_fopen(&fr, &g_efs.myFs, source, 'r') != 0)
    return 0;
  if (rmfile(&g_efs.myFs, (char*)dest) != 0)
    return 0;
  if (file_fopen(&fw, &g_efs.myFs, (char*)dest, 'w') != 0)
    return 0;

  /* With some "insider knowledge", we can save some memory: the "source"
   * parameter holds a filename that was built from the "dest" parameter. It
   * was built in buffer and this buffer has the size INI_BUFFERSIZE. We can
   * reuse this buffer for copying the file.
   */
  while (n=file_read(&fr, INI_BUFFERSIZE, source))
    file_write(&fw, n, source);

  file_fclose(&fr);
  file_fclose(&fw);

  /* Now we need to delete the source file. However, we have garbled the buffer
   * that held the filename of the source. So we need to build it again.
   */
  ini_tempname(source, dest, INI_BUFFERSIZE);
  return rmfile(&g_efs.myFs, source) == 0;
}