tools/dtdesc/c_iff/writechunkdata.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  *  writechunkdata.c - write data to the actual chunk
  14  */
  15
  16 #include "c_iff.h"
  17
  18 /****** c_iff/WriteChunkData ************************************************
  19 *
  20 *   NAME
  21 *       WriteChunkData -- Write some data to the current chunk
  22 *
  23 *   SYNOPSIS
  24 *       Size = WriteChunkData( TheHandle,Buffer,Size )
  25 *
  26 *       long WriteChunkData( struct IFFHandle *,char *,size_t )
  27 *
  28 *   FUNCTION
  29 *       Writes Buffer into the current chunk.
  30 *
  31 *   INPUTS
  32 *       TheHandle   - IFFHandle to write to
  33 *       Buffer      - the buffer containing the data
  34 *       Size        - number of bytes to be written
  35 *
  36 *   RESULT
  37 *       Size        - number of bytes written to the IFF-file
  38 *
  39 *   EXAMPLE
  40 *
  41 *   NOTES
  42 *
  43 *   BUGS
  44 *
  45 *   SEE ALSO
  46 *       NewChunk()
  47 *
  48 *****************************************************************************
  49 *
  50 *       Private notes:
  51 */
  52
  53 long WriteChunkData(struct IFFHandle *TheHandle,
  54                     char *Buffer,
  55                     size_t Size)
  56 {
  57  long Ret;
  58  struct ChunkNode *CN, *PN;
  59
  60  if(!(TheHandle && Buffer))
  61  {
  62   return(-1);
  63  }
  64
  65  Ret=fwrite(Buffer, 1, Size, TheHandle->TheFile);
  66
  67  if(Ret>0)
  68  {
  69   CN=TheHandle->LastNode;
  70
  71   CN->Size+=Ret;
  72
  73   PN=CN->Previous;
  74
  75   while(PN)
  76   {
  77    PN->Size+=Ret;
  78
  79    PN=PN->Previous;
  80   }
  81
  82   TheHandle->IFFSize+=Ret;
  83  }
  84
  85  return(Ret);
  86 }
  87
  88