compiler/posixc/setvbuf.c

   1 /*
   2     Copyright © 1995-2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     C99 function setvbuf().
   6 */
   7
   8 #include <dos/stdio.h>
   9 #include <proto/dos.h>
  10 #include <errno.h>
  11 #include "__fdesc.h"
  12 #include "__stdio.h"
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <stdio.h>
  18
  19         int setvbuf (
  20
  21 /*  SYNOPSIS */
  22         FILE *stream,
  23         char *buf,
  24         int mode,
  25         size_t size)
  26
  27 /*  FUNCTION
  28
  29     INPUTS
  30
  31     RESULT
  32
  33     NOTES
  34
  35     EXAMPLE
  36
  37     BUGS
  38
  39     SEE ALSO
  40
  41     INTERNALS
  42
  43 ******************************************************************************/
  44 {
  45     fdesc *desc;
  46
  47     if (!stream)
  48     {
  49         errno = EFAULT;
  50         return EOF;
  51     }
  52
  53     /* Fail if provided buffer is smaller than minimum required by DOS */
  54     if (buf && size < 208)
  55     {
  56         errno = EFAULT;
  57         return EOF;
  58     }
  59
  60     switch (mode)
  61     {
  62         case _IOFBF: mode = BUF_FULL; break;
  63         case _IOLBF: mode = BUF_LINE; break;
  64         case _IONBF: mode = BUF_NONE; break;
  65         default:
  66             errno = EINVAL;
  67             return EOF;
  68     }
  69
  70     desc = __getfdesc(stream->fd);
  71     if (!desc)
  72     {
  73         errno = EBADF;
  74         return EOF;
  75     }
  76
  77     return SetVBuf(desc->fcb->handle, buf, mode, size ? size : -1);
  78 } /* setvbuf */
  79