tools/dtdesc/c_iff/newiff.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  *  newiff.c - open a new IFF
  14  */
  15
  16 #include "c_iff.h"
  17
  18 /****** c_iff/NewIFF ********************************************************
  19 *
  20 *   NAME
  21 *       NewIFF -- Open a new IFF-file for writing
  22 *
  23 *   SYNOPSIS
  24 *       TheHandle = NewIFF( Name,IFFType )
  25 *
  26 *       struct IFFHandle *NewIFF( char *,uint32_t )
  27 *
  28 *   FUNCTION
  29 *       This is your function, if you want to write an IFF-file.
  30 *       It opens a new IFF-file allocates the IFFHandle and writes
  31 *       an IFF-header to the file.
  32 *
  33 *   INPUTS
  34 *       Name        - name of the IFF-file to be created
  35 *       IFFType     - Type of the IFF (offset 8)
  36 *
  37 *   RESULT
  38 *       TheHandle   - IFFHandle to write to
  39 *
  40 *   EXAMPLE
  41 *
  42 *   NOTES
  43 *       IFF-files created with NewIFF() must be closed with CloseIFF() .
  44 *
  45 *   BUGS
  46 *
  47 *   SEE ALSO
  48 *       CloseIFF()
  49 *
  50 *****************************************************************************
  51 *
  52 *       Private notes:
  53 */
  54
  55 struct IFFHandle *NewIFF(char *Name, uint32_t IFFType)
  56 {
  57  struct IFFHandle *Ret;
  58  uint32_t Buffer[3];
  59
  60  if(!Name)
  61  {
  62   return(NULL);
  63  }
  64
  65  Ret=(struct IFFHandle *) malloc(sizeof(struct IFFHandle));
  66  if(!Ret)
  67  {
  68   return(NULL);
  69  }
  70
  71  Ret->TheFile=fopen(Name, "wb");
  72  if(!Ret->TheFile)
  73  {
  74   free((void *) Ret);
  75   return(NULL);
  76  }
  77
  78  Ret->IFFType=IFFType;
  79  Ret->ChunkID=INVALID_ID;
  80  Ret->BytesLeftInChunk=0;
  81  Ret->NewIFF=TRUE;
  82  Ret->IFFSize=sizeof(uint32_t);
  83  Ret->LastNode=NULL;
  84
  85  Buffer[0]=ID_FORM;
  86  Buffer[1]=0;
  87  Buffer[2]=IFFType;
  88
  89  Buffer[0]=Swap32IfLE(Buffer[0]);
  90  Buffer[1]=Swap32IfLE(Buffer[1]);
  91  Buffer[2]=Swap32IfLE(Buffer[2]);
  92
  93  if(!(fwrite((void *) Buffer, sizeof(uint32_t), 3, Ret->TheFile)==3))
  94  {
  95   fclose(Ret->TheFile);
  96   free((void *) Ret);
  97   return(NULL);
  98  }
  99
 100  return(Ret);
 101 }
 102
 103