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Annotation of embedaddon/mrouted/strlcpy.c, revision 1.1.1.1

1.1       misho       1: /*     $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert 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: #include <sys/types.h>
                     20: #include <string.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: 
                     34:        /* Copy as many bytes as will fit */
                     35:        if (n != 0) {
                     36:                while (--n != 0) {
                     37:                        if ((*d++ = *s++) == '\0')
                     38:                                break;
                     39:                }
                     40:        }
                     41: 
                     42:        /* Not enough room in dst, add NUL and traverse rest of src */
                     43:        if (n == 0) {
                     44:                if (siz != 0)
                     45:                        *d = '\0';              /* NUL-terminate dst */
                     46:                while (*s++)
                     47:                        ;
                     48:        }
                     49: 
                     50:        return(s - src - 1);    /* count does not include NUL */
                     51: }
                     52: 
                     53: /**
                     54:  * Local Variables:
                     55:  *  version-control: t
                     56:  *  c-file-style: "bsd"
                     57:  * End:
                     58:  */