newlib/libc/stdio/wbufw.c

   1 /*
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * and/or other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17 /* No user fns here.  Pesch 15apr92. */
  18
  19 #if defined(LIBC_SCCS) && !defined(lint)
  20 static char sccsid[] = "%W% (Berkeley) %G%";
  21 #endif /* LIBC_SCCS and not lint */
  22
  23 #include <_ansi.h>
  24 #include <stdio.h>
  25 #include <errno.h>
  26 #include "local.h"
  27 #include "fvwrite.h"
  28
  29 /*
  30  * Note that this is the same function as __swbuf_r, just to be called
  31  * from wide-char functions!
  32  *
  33  * The only difference is that we set and test the orientation differently.
  34  */
  35
  36 int
  37 __swbufw_r (struct _reent *ptr,
  38        register int c,
  39        register FILE *fp)
  40 {
  41   register int n;
  42
  43   CHECK_INIT (ptr, fp);
  44
  45   fp->_w = fp->_lbfsize;
  46   if (cantwrite (ptr, fp))
  47     return EOF;
  48   c = (unsigned char) c;
  49
  50   if (ORIENT (fp, 1) != 1)
  51     return EOF;
  52
  53   n = fp->_p - fp->_bf._base;
  54   if (n >= fp->_bf._size)
  55     {
  56       if (_fflush_r (ptr, fp))
  57         return EOF;
  58       n = 0;
  59     }
  60   fp->_w--;
  61   *fp->_p++ = c;
  62   if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
  63     if (_fflush_r (ptr, fp))
  64       return EOF;
  65   return c;
  66 }