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	strlcat.c - sbase - suckless unix tools
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	---
	strlcat.c (1814B)
	---
	1 /*
	2 * Copyright (c) 1998 Todd C. Miller <[email protected]>
	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 WARRANT…
	9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F…
	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 …
	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 * Appends src to string dst of size siz (unlike strncat, siz is the
	24 * full size of dst, not space left). At most siz-1 characters
	25 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
	26 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
	27 * If retval >= siz, truncation occurred.
	28 */
	29 size_t
	30 strlcat(char dst, const char src, size_t siz)
	31 {
	32 char *d = dst;
	33 const char *s = src;
	34 size_t n = siz;
	35 size_t dlen;
	36 /* Find the end of dst and adjust bytes left but don't go past e…
	37 while (n-- != 0 && *d != '\0')
	38 d++;
	39 dlen = d - dst;
	40 n = siz - dlen;
	41 if (n == 0)
	42 return(dlen + strlen(s));
	43 while (*s != '\0') {
	44 if (n != 1) {
	45 d++ = s;
	46 n--;
	47 }
	48 s++;
	49 }
	50 *d = '\0';
	51 return(dlen + (s - src)); /* count does not include NUL */
	52 }
	53
	54 size_t
	55 estrlcat(char dst, const char src, size_t siz)
	56 {
	57 size_t ret;
	58
	59 if ((ret = strlcat(dst, src, siz)) >= siz)
	60 eprintf("strlcat: input string too long\n");
	61
	62 return ret;
	63 }