/os/strlcpy.c
C | 55 lines | 27 code | 6 blank | 22 comment | 13 complexity | ead3a6fa19def806b7b048c814a0efe3 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 TODD C. MILLER DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER 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_DIX_CONFIG_H
- #include <dix-config.h>
- #endif
- #include <sys/types.h>
- #include <string.h>
- #include "os.h"
- #ifndef HAVE_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)
- {
- register char *d = dst;
- register const char *s = src;
- register size_t n = siz;
- /* Copy as many bytes as will fit */
- if (n != 0 && --n != 0) {
- do {
- if ((*d++ = *s++) == 0)
- break;
- } while (--n != 0);
- }
- /* 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 */
- }
- #endif