Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdio/wbuf.c	Lines:	14	18	77.8 %
Date:	2017-11-07	Branches:	16	22	72.7 %


/*	$OpenBSD: wbuf.c,v 1.13 2015/08/31 02:53:57 guenther Exp $ */
/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <stdio.h>
#include <errno.h>
#include "local.h"

/*
 * Write the given character into the (probably full) buffer for
 * the given file.  Flush the buffer out if it is or becomes full,
 * or if c=='\n' and the file is line buffered.
 */
int
__swbuf(int c, FILE *fp)
{
	int n;

	_SET_ORIENTATION(fp, -1);
	/*
	 * In case we cannot write, or longjmp takes us out early,
	 * make sure _w is 0 (if fully- or un-buffered) or -_bf._size
	 * (if line buffered) so that we will get called again.
	 * If we did not do this, a sufficient number of putc()
	 * calls might wrap _w from negative to positive.
	 */
	fp->_w = fp->_lbfsize;
	if (cantwrite(fp)) {
		errno = EBADF;
		return (EOF);
	}
	c = (unsigned char)c;

	/*
	 * If it is completely full, flush it out.  Then, in any case,
	 * stuff c into the buffer.  If this causes the buffer to fill
	 * completely, or if c is '\n' and the file is line buffered,
	 * flush it (perhaps a second time).  The second flush will always
	 * happen on unbuffered streams, where _bf._size==1; __sflush()
	 * guarantees that putc() will always call wbuf() by setting _w
	 * to 0, so we need not do anything else.
	 */
	n = fp->_p - fp->_bf._base;
	if (n >= fp->_bf._size) {
		if (__sflush(fp))
			return (EOF);
		n = 0;
	}
	fp->_w--;
	*fp->_p++ = c;
	if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
		if (__sflush(fp))
			return (EOF);
	return (c);
}
DEF_STRONG(__swbuf);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: wbuf.c,v 1.13 2015/08/31 02:53:57 guenther Exp $ */
2			/*-
3			* Copyright (c) 1990, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* This code is derived from software contributed to Berkeley by
7			* Chris Torek.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in the
16			* documentation and/or other materials provided with the distribution.
17			* 3. Neither the name of the University nor the names of its contributors
18			* may be used to endorse or promote products derived from this software
19			* without specific prior written permission.
20			*
21			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31			* SUCH DAMAGE.
32			*/
33
34			#include <stdio.h>
35			#include <errno.h>
36			#include "local.h"
37
38			/*
39			* Write the given character into the (probably full) buffer for
40			* the given file. Flush the buffer out if it is or becomes full,
41			* or if c=='\n' and the file is line buffered.
42			*/
43			int
44			__swbuf(int c, FILE *fp)
45			{
46			int n;
47
48	✓✗✓✗ ✓✓	59615	_SET_ORIENTATION(fp, -1);
49			/*
50			* In case we cannot write, or longjmp takes us out early,
51			* make sure _w is 0 (if fully- or un-buffered) or -_bf._size
52			* (if line buffered) so that we will get called again.
53			* If we did not do this, a sufficient number of putc()
54			* calls might wrap _w from negative to positive.
55			*/
56		11919	fp->_w = fp->_lbfsize;
57	✓✗✓✓ ✗✓	23858	if (cantwrite(fp)) {
58			errno = EBADF;
59			return (EOF);
60			}
61		11919	c = (unsigned char)c;
62
63			/*
64			* If it is completely full, flush it out. Then, in any case,
65			* stuff c into the buffer. If this causes the buffer to fill
66			* completely, or if c is '\n' and the file is line buffered,
67			* flush it (perhaps a second time). The second flush will always
68			* happen on unbuffered streams, where _bf._size==1; __sflush()
69			* guarantees that putc() will always call wbuf() by setting _w
70			* to 0, so we need not do anything else.
71			*/
72		11919	n = fp->_p - fp->_bf._base;
73	✓✓	11919	if (n >= fp->_bf._size) {
74	✗✓	4944	if (__sflush(fp))
75			return (EOF);
76			n = 0;
77		4944	}
78		11919	fp->_w--;
79		11919	*fp->_p++ = c;
80	✓✓✓✓	23818	if (++n == fp->_bf._size \|\| (fp->_flags & __SLBF && c == '\n'))
81	✗✓	6959	if (__sflush(fp))
82			return (EOF);
83		11919	return (c);
84		11919	}
85			DEF_STRONG(__swbuf);