tools/dtdesc/c_iff/fixiffsize.c

   1 /*
   2  *  c_iff - a portable IFF-parser
   3  *
   4  *  Copyright (C) 2000, 2001 Joerg Dietrich
   5  *
   6  *  This is the AROS-version of c_iff.
   7  *  It is distributed under the AROS Public License.
   8  *  But I reserve the right to distribute
   9  *  my own version under other licenses.
  10  */
  11
  12 /*
  13  *  fixiffsize.c - fix the size when closing the iff
  14  */
  15
  16 #include "c_iff.h"
  17
  18 /****** c_iff/FixIFFSize ****************************************************
  19 *
  20 *   NAME
  21 *       FixIFFSize -- Set the internal size of the IFF-file
  22 *
  23 *   SYNOPSIS
  24 *       FixIFFSize( TheHandle )
  25 *
  26 *       void FixIFFSize( struct IFFHandle * )
  27 *
  28 *   FUNCTION
  29 *       This internal function is called shortly before closing the IFF-file.
  30 *       It fixes the internal size (offset 4) of the IFF-file.
  31 *
  32 *   INPUTS
  33 *       TheHandle   - IFFHandle to fix
  34 *
  35 *   RESULT
  36 *
  37 *   EXAMPLE
  38 *
  39 *   NOTES
  40 *       This function ignores IFFHandles opened for reading.
  41 *
  42 *   BUGS
  43 *
  44 *   SEE ALSO
  45 *       CloseIFF()
  46 *
  47 *****************************************************************************
  48 *
  49 *       Private notes:
  50 */
  51
  52 void FixIFFSize(struct IFFHandle *TheHandle)
  53 {
  54  uint32_t Buffer;
  55
  56  if(!TheHandle)
  57  {
  58   return;
  59  }
  60
  61  if(!TheHandle->NewIFF)
  62  {
  63   return;
  64  }
  65
  66  if(fseek(TheHandle->TheFile, sizeof(uint32_t), SEEK_SET))
  67  {
  68   return;
  69  }
  70
  71  Buffer=TheHandle->IFFSize;
  72  Buffer=Swap32IfLE(Buffer);
  73
  74  fwrite((void *) &Buffer, sizeof(uint32_t), 1, TheHandle->TheFile);
  75 }
  76
  77