1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)wbuf.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)wbuf.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
|
37__FBSDID("$FreeBSD: stable/10/lib/libc/stdio/wbuf.c 249810 2013-04-23 14:36:44Z emaste $");
| 37__FBSDID("$FreeBSD: stable/10/lib/libc/stdio/wbuf.c 269482 2014-08-03 18:28:10Z pfg $");
|
38
| 38
|
| 39#include <errno.h>
|
39#include <stdio.h>
40#include "local.h"
41
42/*
43 * Write the given character into the (probably full) buffer for
44 * the given file. Flush the buffer out if it is or becomes full,
45 * or if c=='\n' and the file is line buffered.
46 *
47 * Non-MT-safe
48 */
49int
50__swbuf(int c, FILE *fp)
51{
52 int n;
53
54 /*
55 * In case we cannot write, or longjmp takes us out early,
56 * make sure _w is 0 (if fully- or un-buffered) or -_bf._size
57 * (if line buffered) so that we will get called again.
58 * If we did not do this, a sufficient number of putc()
59 * calls might wrap _w from negative to positive.
60 */
61 fp->_w = fp->_lbfsize;
| 40#include <stdio.h>
41#include "local.h"
42
43/*
44 * Write the given character into the (probably full) buffer for
45 * the given file. Flush the buffer out if it is or becomes full,
46 * or if c=='\n' and the file is line buffered.
47 *
48 * Non-MT-safe
49 */
50int
51__swbuf(int c, FILE *fp)
52{
53 int n;
54
55 /*
56 * In case we cannot write, or longjmp takes us out early,
57 * make sure _w is 0 (if fully- or un-buffered) or -_bf._size
58 * (if line buffered) so that we will get called again.
59 * If we did not do this, a sufficient number of putc()
60 * calls might wrap _w from negative to positive.
61 */
62 fp->_w = fp->_lbfsize;
|
62 if (prepwrite(fp) != 0)
| 63 if (prepwrite(fp) != 0) {
64 errno = EBADF;
|
63 return (EOF);
| 65 return (EOF);
|
| 66 }
|
64 c = (unsigned char)c;
65
66 ORIENT(fp, -1);
67
68 /*
69 * If it is completely full, flush it out. Then, in any case,
70 * stuff c into the buffer. If this causes the buffer to fill
71 * completely, or if c is '\n' and the file is line buffered,
72 * flush it (perhaps a second time). The second flush will always
73 * happen on unbuffered streams, where _bf._size==1; fflush()
74 * guarantees that putc() will always call wbuf() by setting _w
75 * to 0, so we need not do anything else.
76 */
77 n = fp->_p - fp->_bf._base;
78 if (n >= fp->_bf._size) {
79 if (__fflush(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(fp))
87 return (EOF);
88 return (c);
89}
| 67 c = (unsigned char)c;
68
69 ORIENT(fp, -1);
70
71 /*
72 * If it is completely full, flush it out. Then, in any case,
73 * stuff c into the buffer. If this causes the buffer to fill
74 * completely, or if c is '\n' and the file is line buffered,
75 * flush it (perhaps a second time). The second flush will always
76 * happen on unbuffered streams, where _bf._size==1; fflush()
77 * guarantees that putc() will always call wbuf() by setting _w
78 * to 0, so we need not do anything else.
79 */
80 n = fp->_p - fp->_bf._base;
81 if (n >= fp->_bf._size) {
82 if (__fflush(fp))
83 return (EOF);
84 n = 0;
85 }
86 fp->_w--;
87 *fp->_p++ = c;
88 if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
89 if (__fflush(fp))
90 return (EOF);
91 return (c);
92}
|