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Annotation of mandoc/compat_strlcpy.c, Revision 1.3

1.2       kristaps    1: #include "config.h"
                      2:
1.1       kristaps    3: #ifdef HAVE_STRLCPY
                      4:
                      5: int dummy;
                      6:
                      7: #else
                      8:
                      9: /*     $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $    */
                     10:
                     11: /*
                     12:  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
                     13:  *
                     14:  * Permission to use, copy, modify, and distribute this software for any
                     15:  * purpose with or without fee is hereby granted, provided that the above
                     16:  * copyright notice and this permission notice appear in all copies.
                     17:  *
                     18:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     19:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     21:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     22:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     23:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     24:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     25:  */
                     26:
                     27: #include <sys/types.h>
                     28: #include <string.h>
                     29:
                     30: /*
                     31:  * Copy src to string dst of size siz.  At most siz-1 characters
                     32:  * will be copied.  Always NUL terminates (unless siz == 0).
                     33:  * Returns strlen(src); if retval >= siz, truncation occurred.
                     34:  */
                     35: size_t
                     36: strlcpy(char *dst, const char *src, size_t siz)
                     37: {
                     38:        char *d = dst;
                     39:        const char *s = src;
                     40:        size_t n = siz;
                     41:
                     42:        /* Copy as many bytes as will fit */
                     43:        if (n != 0) {
                     44:                while (--n != 0) {
                     45:                        if ((*d++ = *s++) == '\0')
                     46:                                break;
                     47:                }
                     48:        }
                     49:
                     50:        /* Not enough room in dst, add NUL and traverse rest of src */
                     51:        if (n == 0) {
                     52:                if (siz != 0)
                     53:                        *d = '\0';              /* NUL-terminate dst */
                     54:                while (*s++)
                     55:                        ;
                     56:        }
                     57:
                     58:        return(s - src - 1);    /* count does not include NUL */
                     59: }
                     60:
                     61: #endif

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