OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libc/] [stdio/] [wbuf.c] - Blame information for rev 816

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 148 jeremybenn
/*
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
 * advertising materials, and 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
 * Write the given character into the (probably full) buffer for
31
 * the given file.  Flush the buffer out if it is or becomes full,
32
 * or if c=='\n' and the file is line buffered.
33
 */
34
 
35
int
36
_DEFUN(__swbuf_r, (ptr, c, fp),
37
       struct _reent *ptr _AND
38
       register int c _AND
39
       register FILE *fp)
40
{
41
  register int n;
42
 
43
  /* Ensure stdio has been initialized.  */
44
 
45
  CHECK_INIT (ptr, fp);
46
 
47
  /*
48
   * In case we cannot write, or longjmp takes us out early,
49
   * make sure _w is 0 (if fully- or un-buffered) or -_bf._size
50
   * (if line buffered) so that we will get called again.
51
   * If we did not do this, a sufficient number of putc()
52
   * calls might wrap _w from negative to positive.
53
   */
54
 
55
  fp->_w = fp->_lbfsize;
56
  if (cantwrite (ptr, fp))
57
    {
58
      fp->_flags |= __SERR;
59
      ptr->_errno = EBADF;
60
      return EOF;
61
    }
62
  c = (unsigned char) c;
63
 
64
  ORIENT (fp, -1);
65
 
66
  /*
67
   * If it is completely full, flush it out.  Then, in any case,
68
   * stuff c into the buffer.  If this causes the buffer to fill
69
   * completely, or if c is '\n' and the file is line buffered,
70
   * flush it (perhaps a second time).  The second flush will always
71
   * happen on unbuffered streams, where _bf._size==1; fflush()
72
   * guarantees that putc() will always call wbuf() by setting _w
73
   * to 0, so we need not do anything else.
74
   */
75
 
76
  n = fp->_p - fp->_bf._base;
77
  if (n >= fp->_bf._size)
78
    {
79
      if (_fflush_r (ptr, fp))
80
        return EOF;
81
      n = 0;
82
    }
83
  fp->_w--;
84
  *fp->_p++ = c;
85
  if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
86
    if (_fflush_r (ptr, fp))
87
      return EOF;
88
  return c;
89
}
90
 
91
/* This function isn't any longer declared in stdio.h, but it's
92
   required for backward compatibility with applications built against
93
   earlier dynamically built newlib libraries. */
94
int
95
_DEFUN(__swbuf, (c, fp),
96
       register int c _AND
97
       register FILE *fp)
98
{
99
  return __swbuf_r (_REENT, c, fp);
100
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.