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       1                 :            : /*
       2                 :            :  *****************************************************************************
       3                 :            :  *
       4                 :            :  * File:    strlcpy.c
       5                 :            :  *
       6                 :            :  * Purpose: Safer string copy routine.
       7                 :            :  *
       8                 :            :  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
       9                 :            :  * All rights reserved.
      10                 :            :  *
      11                 :            :  * Redistribution and use in source and binary forms, with or without
      12                 :            :  * modification, are permitted provided that the following conditions
      13                 :            :  * are met:
      14                 :            :  * 1. Redistributions of source code must retain the above copyright
      15                 :            :  *    notice, this list of conditions and the following disclaimer.
      16                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      17                 :            :  *    notice, this list of conditions and the following disclaimer in the
      18                 :            :  *    documentation and/or other materials provided with the distribution.
      19                 :            :  * 3. The name of the author may not be used to endorse or promote products
      20                 :            :  *    derived from this software without specific prior written permission.
      21                 :            :  *
      22                 :            :  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
      23                 :            :  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
      24                 :            :  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
      25                 :            :  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      26                 :            :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      27                 :            :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
      28                 :            :  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
      29                 :            :  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
      30                 :            :  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
      31                 :            :  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      32                 :            :  *
      33                 :            :  *****************************************************************************
      34                 :            : */
      35                 :            : #include "fko_common.h"
      36                 :            : 
      37                 :            : #if !HAVE_STRLCPY
      38                 :            : /*
      39                 :            :  * Copy src to string dst of size siz.  At most siz-1 characters
      40                 :            :  * will be copied.  Always NUL terminates (unless siz == 0).
      41                 :            :  * Returns strlen(src); if retval >= siz, truncation occurred.
      42                 :            :  */
      43                 :            : size_t
      44                 :     581137 : strlcpy(char *dst, const char *src, size_t siz)
      45                 :            : {
      46                 :     581137 :         register char *d = dst;
      47                 :     581137 :         register const char *s = src;
      48                 :     581137 :         register size_t n = siz;
      49                 :            : 
      50                 :            :         /* Copy as many bytes as will fit */
      51 [ +  - ][ +  + ]:     581137 :         if (n != 0 && --n != 0) {
      52                 :            :                 do {
      53         [ +  + ]:   12612463 :                         if ((*d++ = *s++) == 0)
      54                 :            :                                 break;
      55         [ +  + ]:   12161241 :                 } while (--n != 0);
      56                 :            :         }
      57                 :            : 
      58                 :            :         /* Not enough room in dst, add NUL and traverse rest of src */
      59         [ +  + ]:     581137 :         if (n == 0) {
      60         [ +  - ]:     129915 :                 if (siz != 0)
      61                 :     129915 :                         *d = '\0';              /* NUL-terminate dst */
      62         [ +  + ]:     297143 :                 while (*s++)
      63                 :            :                         ;
      64                 :            :         }
      65                 :            : 
      66                 :     581137 :         return(s - src - 1);    /* count does not include NUL */
      67                 :            : }
      68                 :            : #endif
      69                 :            : 
      70                 :            : /***EOF***/