morpheus-base

morpheus base system
git clone git://git.2f30.org/morpheus-base.git
Log | Files | Refs

strlcpy.c (1506B)


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