Annotation of sys/lib/libkern/strlcat.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: strlcat.c,v 1.5 2004/08/07 00:38:33 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1998 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: #if defined(LIBC_SCCS) && !defined(lint)
! 20: static char *rcsid = "$OpenBSD: strlcat.c,v 1.5 2004/08/07 00:38:33 deraadt Exp $";
! 21: #endif /* LIBC_SCCS and not lint */
! 22:
! 23: #if !defined(_KERNEL) && !defined(_STANDALONE)
! 24: #include <sys/types.h>
! 25: #include <string.h>
! 26: #else
! 27: #include <lib/libkern/libkern.h>
! 28: #endif
! 29:
! 30: /*
! 31: * Appends src to string dst of size siz (unlike strncat, siz is the
! 32: * full size of dst, not space left). At most siz-1 characters
! 33: * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
! 34: * Returns strlen(src) + MIN(siz, strlen(initial dst)).
! 35: * If retval >= siz, truncation occurred.
! 36: */
! 37: size_t
! 38: strlcat(char *dst, const char *src, size_t siz)
! 39: {
! 40: char *d = dst;
! 41: const char *s = src;
! 42: size_t n = siz;
! 43: size_t dlen;
! 44:
! 45: /* Find the end of dst and adjust bytes left but don't go past end */
! 46: while (n-- != 0 && *d != '\0')
! 47: d++;
! 48: dlen = d - dst;
! 49: n = siz - dlen;
! 50:
! 51: if (n == 0)
! 52: return(dlen + strlen(s));
! 53: while (*s != '\0') {
! 54: if (n != 1) {
! 55: *d++ = *s;
! 56: n--;
! 57: }
! 58: s++;
! 59: }
! 60: *d = '\0';
! 61:
! 62: return(dlen + (s - src)); /* count does not include NUL */
! 63: }
CVSweb