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Annotation of embedaddon/libevent/strlcpy.c, revision 1.1

1.1     ! misho       1: /*     $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $     */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. The name of the author may not be used to endorse or promote products
        !            16:  *    derived from this software without specific prior written permission.
        !            17:  *
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
        !            19:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
        !            20:  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
        !            21:  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
        !            22:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
        !            23:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
        !            24:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
        !            25:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
        !            26:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
        !            27:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            28:  */
        !            29: 
        !            30: #if defined(LIBC_SCCS) && !defined(lint)
        !            31: static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $";
        !            32: #endif /* LIBC_SCCS and not lint */
        !            33: 
        !            34: #include <sys/types.h>
        !            35: 
        !            36: #ifdef HAVE_CONFIG_H
        !            37: #include "config.h"
        !            38: #endif /* HAVE_CONFIG_H */
        !            39: 
        !            40: #ifndef HAVE_STRLCPY
        !            41: #include "strlcpy-internal.h"
        !            42: 
        !            43: /*
        !            44:  * Copy src to string dst of size siz.  At most siz-1 characters
        !            45:  * will be copied.  Always NUL terminates (unless siz == 0).
        !            46:  * Returns strlen(src); if retval >= siz, truncation occurred.
        !            47:  */
        !            48: size_t
        !            49: _event_strlcpy(dst, src, siz)
        !            50:        char *dst;
        !            51:        const char *src;
        !            52:        size_t siz;
        !            53: {
        !            54:        register char *d = dst;
        !            55:        register const char *s = src;
        !            56:        register size_t n = siz;
        !            57: 
        !            58:        /* Copy as many bytes as will fit */
        !            59:        if (n != 0 && --n != 0) {
        !            60:                do {
        !            61:                        if ((*d++ = *s++) == 0)
        !            62:                                break;
        !            63:                } while (--n != 0);
        !            64:        }
        !            65: 
        !            66:        /* Not enough room in dst, add NUL and traverse rest of src */
        !            67:        if (n == 0) {
        !            68:                if (siz != 0)
        !            69:                        *d = '\0';              /* NUL-terminate dst */
        !            70:                while (*s++)
        !            71:                        ;
        !            72:        }
        !            73: 
        !            74:        return(s - src - 1);    /* count does not include NUL */
        !            75: }
        !            76: #endif