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scoutos / prex-0.9.0 / usr / lib / libc / string / strlcpy.c @ 03e9c04a

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/*        $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $        */
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/*
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 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <string.h>
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/*
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 * Copy src to string dst of size siz.  At most siz-1 characters
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 * will be copied.  Always NUL terminates (unless siz == 0).
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 * Returns strlen(src); if retval >= siz, truncation occurred.
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 */
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size_t
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strlcpy(char *dst, const char *src, size_t siz)
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{
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        char *d = dst;
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        const char *s = src;
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        size_t n = siz;
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        /* Copy as many bytes as will fit */
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        if (n != 0 && --n != 0) {
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                do {
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                        if ((*d++ = *s++) == 0)
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                                break;
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                } while (--n != 0);
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        }
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        /* Not enough room in dst, add NUL and traverse rest of src */
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        if (n == 0) {
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                if (siz != 0)
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                        *d = '\0';                /* NUL-terminate dst */
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                while (*s++)
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                        ;
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        }
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        return(s - src - 1);        /* count does not include NUL */
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}