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3eb38795db
We rewrite strncat to use strnlen and malloc calls which simplifies code an is faster as these functions are better optimized than original code.
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#ifndef STRNCAT
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# undef strncat
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# define STRNCAT strncat
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#endif
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char *
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STRNCAT (char *s1, const char *s2, size_t n)
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{
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char *s = s1;
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/* Find the end of S1. */
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s1 += strlen (s1);
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size_t ss = __strnlen (s2, n);
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s1[ss] = '\0';
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memcpy (s1, s2, ss);
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return s;
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}
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