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