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cell-binutils  2.17cvs20070401
stpncpy.c
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00001 /* Implement the stpncpy function.
00002    Copyright (C) 2003 Free Software Foundation, Inc.
00003    Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
00004 
00005 This file is part of the libiberty library.
00006 Libiberty is free software; you can redistribute it and/or
00007 modify it under the terms of the GNU Library General Public
00008 License as published by the Free Software Foundation; either
00009 version 2 of the License, or (at your option) any later version.
00010 
00011 Libiberty is distributed in the hope that it will be useful,
00012 but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014 Library General Public License for more details.
00015 
00016 You should have received a copy of the GNU Library General Public
00017 License along with libiberty; see the file COPYING.LIB.  If
00018 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
00019 Boston, MA 02110-1301, USA.  */
00020 
00021 /*
00022 
00023 @deftypefn Supplemental char* stpncpy (char *@var{dst}, const char *@var{src}, size_t @var{len})
00024 
00025 Copies the string @var{src} into @var{dst}, copying exactly @var{len}
00026 and padding with zeros if necessary.  If @var{len} < strlen(@var{src})
00027 then return @var{dst} + @var{len}, otherwise returns @var{dst} +
00028 strlen(@var{src}).
00029 
00030 @end deftypefn
00031 
00032 */
00033 
00034 #include <ansidecl.h>
00035 #include <stddef.h>
00036 
00037 extern size_t strlen (const char *);
00038 extern char *strncpy (char *, const char *, size_t);
00039 
00040 char *
00041 stpncpy (char *dst, const char *src, size_t len)
00042 {
00043   size_t n = strlen (src);
00044   if (n > len)
00045     n = len;
00046   return strncpy (dst, src, len) + n;
00047 }