compiler/clib/setvbuf.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     ANSI C function setvbuf().
   6 */
   7
   8 #include <dos/stdio.h>
   9 #include <proto/dos.h>
  10 #include <errno.h>
  11 #include "__fdesc.h"
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <stdio.h>
  17
  18         int setvbuf (
  19
  20 /*  SYNOPSIS */
  21         FILE *stream,
  22         char *buf,
  23         int mode,
  24         size_t size)
  25
  26 /*  FUNCTION
  27
  28     INPUTS
  29
  30     RESULT
  31
  32     NOTES
  33
  34     EXAMPLE
  35
  36     BUGS
  37
  38     SEE ALSO
  39
  40     INTERNALS
  41
  42 ******************************************************************************/
  43 {
  44     fdesc *desc;
  45
  46     if (!stream)
  47     {
  48         errno = EFAULT;
  49         return EOF;
  50     }
  51
  52     /* Fail if provided buffer is smaller than minimum required by DOS */
  53     if (buf && size < 208)
  54     {
  55         errno = EFAULT;
  56         return EOF;
  57     }
  58
  59     switch (mode)
  60     {
  61         case _IOFBF: mode = BUF_FULL; break;
  62         case _IOLBF: mode = BUF_LINE; break;
  63         case _IONBF: mode = BUF_NONE; break;
  64         default:
  65             errno = EINVAL;
  66             return EOF;
  67     }
  68
  69     desc = __getfdesc(stream->fd);
  70     if (!desc)
  71     {
  72         errno = EBADF;
  73         return EOF;
  74     }
  75
  76     return SetVBuf(desc->fcb->fh, buf, mode, size ? size : -1);
  77 } /* setvbuf */
  78