sfeed

simple feed reader - forked from git.codemadness.org/sfeed
git clone git://src.gearsix.net/sfeed
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strlcpy.c (1576B)


      1 /*	$OpenBSD: 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 #include <string.h>
     20 
     21 /*
     22  * Copy string src to buffer dst of size dsize.  At most dsize-1
     23  * chars will be copied.  Always NUL terminates (unless dsize == 0).
     24  * Returns strlen(src); if retval >= dsize, truncation occurred.
     25  */
     26 size_t
     27 strlcpy(char *dst, const char *src, size_t dsize)
     28 {
     29 	const char *osrc = src;
     30 	size_t nleft = dsize;
     31 
     32 	/* Copy as many bytes as will fit. */
     33 	if (nleft != 0) {
     34 		while (--nleft != 0) {
     35 			if ((*dst++ = *src++) == '\0')
     36 				break;
     37 		}
     38 	}
     39 
     40 	/* Not enough room in dst, add NUL and traverse rest of src. */
     41 	if (nleft == 0) {
     42 		if (dsize != 0)
     43 			*dst = '\0';		/* NUL-terminate dst */
     44 		while (*src++)
     45 			;
     46 	}
     47 
     48 	return(src - osrc - 1);	/* count does not include NUL */
     49 }