Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdio/getdelim.c	Lines:	12	48	25.0 %
Date:	2017-11-07	Branches:	11	42	26.2 %


/*	$OpenBSD: getdelim.c,v 1.6 2017/04/13 18:36:51 brynet Exp $	*/
/* $NetBSD: getdelim.c,v 1.13 2011/07/22 23:12:30 joerg Exp $ */

/*
 * Copyright (c) 2009 The NetBSD Foundation, Inc.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Roy Marples.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "local.h"

/* Minimum buffer size we create.
 * This should allow config files to fit into our power of 2 buffer growth
 * without the need for a realloc. */
#define MINBUF	128

ssize_t
getdelim(char **__restrict buf, size_t *__restrict buflen,
    int sep, FILE *__restrict fp)
{
	unsigned char *p;
	size_t len, newlen, off;
	char *newb;

	FLOCKFILE(fp);

	if (buf == NULL || buflen == NULL) {
		errno = EINVAL;
		goto error;
	}

	/* If buf is NULL, we have to assume a size of zero */
	if (*buf == NULL)
		*buflen = 0;

	_SET_ORIENTATION(fp, -1);
	off = 0;
	do {
		/* If the input buffer is empty, refill it */
		if (fp->_r <= 0 && __srefill(fp)) {
			if (__sferror(fp))
				goto error;
			/* No error, so EOF. */
			break;
		}

		/* Scan through looking for the separator */
		p = memchr(fp->_p, sep, fp->_r);
		if (p == NULL)
			len = fp->_r;
		else
			len = (p - fp->_p) + 1;

		/* Ensure we can handle it */
		if (off > SSIZE_MAX || len + 1 > SSIZE_MAX - off) {
			errno = EOVERFLOW;
			goto error;
		}
		newlen = off + len + 1; /* reserve space for NUL terminator */
		if (newlen > *buflen) {
			if (newlen < MINBUF)
				newlen = MINBUF;
#define powerof2(x) ((((x)-1)&(x))==0)
			if (!powerof2(newlen)) {
				/* Grow the buffer to the next power of 2 */
				newlen--;
				newlen |= newlen >> 1;
				newlen |= newlen >> 2;
				newlen |= newlen >> 4;
				newlen |= newlen >> 8;
				newlen |= newlen >> 16;
#if SIZE_MAX > 0xffffffffU
				newlen |= newlen >> 32;
#endif
				newlen++;
			}

			newb = recallocarray(*buf, *buflen, newlen, 1);
			if (newb == NULL)
				goto error;
			*buf = newb;
			*buflen = newlen;
		}

		(void)memcpy((*buf + off), fp->_p, len);
		/* Safe, len is never greater than what fp->_r can fit. */
		fp->_r -= (int)len;
		fp->_p += (int)len;
		off += len;
	} while (p == NULL);

	FUNLOCKFILE(fp);

	/* POSIX demands we return -1 on EOF. */
	if (off == 0)
		return -1;

	if (*buf != NULL)
		*(*buf + off) = '\0';
	return off;

error:
	fp->_flags |= __SERR;
	FUNLOCKFILE(fp);
	return -1;
}
DEF_WEAK(getdelim);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: getdelim.c,v 1.6 2017/04/13 18:36:51 brynet Exp $ */
2			/* $NetBSD: getdelim.c,v 1.13 2011/07/22 23:12:30 joerg Exp $ */
3
4			/*
5			* Copyright (c) 2009 The NetBSD Foundation, Inc.
6			*
7			* This code is derived from software contributed to The NetBSD Foundation
8			* by Roy Marples.
9			*
10			* Redistribution and use in source and binary forms, with or without
11			* modification, are permitted provided that the following conditions
12			* are met:
13			* 1. Redistributions of source code must retain the above copyright
14			* notice, this list of conditions and the following disclaimer.
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in the
17			* documentation and/or other materials provided with the distribution.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29			*/
30
31			#include <errno.h>
32			#include <limits.h>
33			#include <stdint.h>
34			#include <stdio.h>
35			#include <stdlib.h>
36			#include <string.h>
37
38			#include "local.h"
39
40			/* Minimum buffer size we create.
41			* This should allow config files to fit into our power of 2 buffer growth
42			* without the need for a realloc. */
43			#define MINBUF 128
44
45			ssize_t
46			getdelim(char *__restrict buf, size_t __restrict buflen,
47			int sep, FILE *__restrict fp)
48			{
49			unsigned char *p;
50			size_t len, newlen, off;
51			char *newb;
52
53	✗✓	20	FLOCKFILE(fp);
54
55	✗✓	10	if (buf == NULL \|\| buflen == NULL) {
56			errno = EINVAL;
57			goto error;
58			}
59
60			/* If buf is NULL, we have to assume a size of zero */
61	✓✗	10	if (*buf == NULL)
62		10	*buflen = 0;
63
64	✓✗✓✗ ✓✗	50	_SET_ORIENTATION(fp, -1);
65			off = 0;
66		10	do {
67			/* If the input buffer is empty, refill it */
68	✓✗✓✗	20	if (fp->_r <= 0 && __srefill(fp)) {
69	✓✗	10	if (__sferror(fp))
70			goto error;
71			/* No error, so EOF. */
72			break;
73			}
74
75			/* Scan through looking for the separator */
76			p = memchr(fp->_p, sep, fp->_r);
77			if (p == NULL)
78			len = fp->_r;
79			else
80			len = (p - fp->_p) + 1;
81
82			/* Ensure we can handle it */
83			if (off > SSIZE_MAX \|\| len + 1 > SSIZE_MAX - off) {
84			errno = EOVERFLOW;
85			goto error;
86			}
87			newlen = off + len + 1; /* reserve space for NUL terminator */
88			if (newlen > *buflen) {
89			if (newlen < MINBUF)
90			newlen = MINBUF;
91			#define powerof2(x) ((((x)-1)&(x))==0)
92			if (!powerof2(newlen)) {
93			/* Grow the buffer to the next power of 2 */
94			newlen--;
95			newlen \|= newlen >> 1;
96			newlen \|= newlen >> 2;
97			newlen \|= newlen >> 4;
98			newlen \|= newlen >> 8;
99			newlen \|= newlen >> 16;
100			#if SIZE_MAX > 0xffffffffU
101			newlen \|= newlen >> 32;
102			#endif
103			newlen++;
104			}
105
106			newb = recallocarray(buf, buflen, newlen, 1);
107			if (newb == NULL)
108			goto error;
109			*buf = newb;
110			*buflen = newlen;
111			}
112
113			(void)memcpy((*buf + off), fp->_p, len);
114			/* Safe, len is never greater than what fp->_r can fit. */
115			fp->_r -= (int)len;
116			fp->_p += (int)len;
117			off += len;
118			} while (p == NULL);
119
120	✗✓	10	FUNLOCKFILE(fp);
121
122			/* POSIX demands we return -1 on EOF. */
123	✓✗	10	if (off == 0)
124		10	return -1;
125
126			if (*buf != NULL)
127			(buf + off) = '\0';
128			return off;
129
130			error:
131			fp->_flags \|= __SERR;
132			FUNLOCKFILE(fp);
133			return -1;
134		10	}
135			DEF_WEAK(getdelim);