/libc/string/strlcpy.c
C | 52 lines | 21 code | 7 blank | 24 comment | 11 complexity | 78f79ad077c1e900f33a9d4b71acd3c9 MD5 | raw file
- /*
- * Copyright (c) 1998 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.
- */
- #include <stdint.h>
- #include <string.h>
- /****************************************************************************
- * strlcpy
- *
- * Copy src to string dst of size siz. At most siz-1 characters
- * will be copied. Always NUL terminates (unless siz == 0).
- * Returns strlen(src); if retval >= siz, truncation occurred.
- */
- size_t strlcpy(char *dst, const char *src, size_t siz) {
- char *d = dst;
- const char *s = src;
- size_t n = siz;
- /* Copy as many bytes as will fit */
- if (n != 0) {
- while (--n != 0) {
- if ((*d++ = *s++) == '\0') {
- break;
- }
- }
- }
- /* Not enough room in dst, add NUL and traverse rest of src */
- if (n == 0) {
- if (siz != 0) {
- *d = '\0'; /* NUL-terminate dst */
- }
- while (*s++);
- }
- return (s - src - 1); /* count does not include NUL */
- }