/src/libpcap/missing/strlcpy.c

Source (jump to first uncovered line)
/*  $OpenBSD: pcap_strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */

/*
 * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stddef.h>
#include <string.h>

#include "portability.h"

/*
 * Copy string src to buffer dst of size dsize.  At most dsize-1
 * chars will be copied.  Always NUL terminates (unless dsize == 0).
 * Returns strlen(src); if retval >= dsize, truncation occurred.
 */
size_t
pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dsize)
{
  const char *osrc = src;
  size_t nleft = dsize;

  /* Copy as many bytes as will fit. */
  if (nleft != 0) {
    while (--nleft != 0) {
      if ((*dst++ = *src++) == '\0')
        break;
    }
  }

  /* Not enough room in dst, add NUL and traverse rest of src. */
  if (nleft == 0) {
    if (dsize != 0)
      *dst = '\0';   /* NUL-terminate dst */
    while (*src++)
      ;
  }

  return(src - osrc - 1); /* count does not include NUL */
}

Coverage Report

Created: 2023-05-05 14:17

Line	Count	Source (jump to first uncovered line)
1		/* $OpenBSD: pcap_strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */
2
3		/*
4		* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
5		*
6		* Permission to use, copy, modify, and distribute this software for any
7		* purpose with or without fee is hereby granted, provided that the above
8		* copyright notice and this permission notice appear in all copies.
9		*
10		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15		* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16		* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17		*/
18
19		#ifdef HAVE_CONFIG_H
20		#include <config.h>
21		#endif
22
23		#include <stddef.h>
24		#include <string.h>
25
26		#include "portability.h"
27
28		/*
29		* Copy string src to buffer dst of size dsize. At most dsize-1
30		* chars will be copied. Always NUL terminates (unless dsize == 0).
31		* Returns strlen(src); if retval >= dsize, truncation occurred.
32		*/
33		size_t
34		pcap_strlcpy(char * restrict dst, const char * restrict src, size_t dsize)
35	0	{
36	0	const char *osrc = src;
37	0	size_t nleft = dsize;
38
39		/* Copy as many bytes as will fit. */
40	0	if (nleft != 0) {
41	0	while (--nleft != 0) {
42	0	if ((dst++ = src++) == '\0')
43	0	break;
44	0	}
45	0	}
46
47		/* Not enough room in dst, add NUL and traverse rest of src. */
48	0	if (nleft == 0) {
49	0	if (dsize != 0)
50	0	dst = '\0'; / NUL-terminate dst */
51	0	while (*src++)
52	0	;
53	0	}
54
55	0	return(src - osrc - 1); /* count does not include NUL */
56	0	}