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Annotation of embedaddon/pimd/libite/strlcat.c, revision 1.1.1.1

1.1       misho       1: /*     $OpenBSD: strlcat.c,v 1.15 2015/03/02 21:41:08 millert Exp $    */
                      2: 
                      3: /*
                      4:  * Copyright (c) 1998, 2015 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: #ifndef strlcat
                     23: /*
                     24:  * Appends src to string dst of size dsize (unlike strncat, dsize is the
                     25:  * full size of dst, not space left).  At most dsize-1 characters
                     26:  * will be copied.  Always NUL terminates (unless dsize <= strlen(dst)).
                     27:  * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
                     28:  * If retval >= dsize, truncation occurred.
                     29:  */
                     30: size_t
                     31: strlcat(char *dst, const char *src, size_t dsize)
                     32: {
                     33:        const char *odst = dst;
                     34:        const char *osrc = src;
                     35:        size_t n = dsize;
                     36:        size_t dlen;
                     37: 
                     38:        /* Find the end of dst and adjust bytes left but don't go past end. */
                     39:        while (n-- != 0 && *dst != '\0')
                     40:                dst++;
                     41:        dlen = dst - odst;
                     42:        n = dsize - dlen;
                     43: 
                     44:        if (n-- == 0)
                     45:                return(dlen + strlen(src));
                     46:        while (*src != '\0') {
                     47:                if (n != 0) {
                     48:                        *dst++ = *src;
                     49:                        n--;
                     50:                }
                     51:                src++;
                     52:        }
                     53:        *dst = '\0';
                     54: 
                     55:        return(dlen + (src - osrc));    /* count does not include NUL */
                     56: }
                     57: #endif