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1 /* Implement the stpncpy function.
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2 Copyright (C) 2003 Free Software Foundation, Inc.
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3 Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
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4
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5 This file is part of the libiberty library.
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6 Libiberty is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Library General Public
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8 License as published by the Free Software Foundation; either
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9 version 2 of the License, or (at your option) any later version.
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10
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11 Libiberty is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 Library General Public License for more details.
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15
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16 You should have received a copy of the GNU Library General Public
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17 License along with libiberty; see the file COPYING.LIB. If
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18 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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19 Boston, MA 02110-1301, USA. */
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20
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21 /*
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22
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23 @deftypefn Supplemental char* stpncpy (char *@var{dst}, const char *@var{src}, size_t @var{len})
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24
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25 Copies the string @var{src} into @var{dst}, copying exactly @var{len}
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26 and padding with zeros if necessary. If @var{len} < strlen(@var{src})
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27 then return @var{dst} + @var{len}, otherwise returns @var{dst} +
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28 strlen(@var{src}).
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29
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30 @end deftypefn
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31
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32 */
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33
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34 #include <ansidecl.h>
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35 #include <stddef.h>
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36
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37 extern size_t strlen (const char *);
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38 extern char *strncpy (char *, const char *, size_t);
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39
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40 char *
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41 stpncpy (char *dst, const char *src, size_t len)
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42 {
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43 size_t n = strlen (src);
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44 if (n > len)
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45 n = len;
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46 return strncpy (dst, src, len) + n;
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47 }
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