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