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/* Copy a null-terminated string to a fixed-size buffer, with length checking.
* Copyright (C) 2016 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, see
* <http://www.gnu.org/licenses/>.
*/
/* adapted for Quagga from glibc patch submission originally from
* Florian Weimer <fweimer@redhat.com>, 2016-05-18 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#ifndef HAVE_STRLCPY
#undef strlcpy
size_t strlcpy(char *__restrict dest,
const char *__restrict src, size_t destsize);
size_t strlcpy(char *__restrict dest,
const char *__restrict src, size_t destsize)
{
size_t src_length = strlen(src);
if (__builtin_expect(src_length >= destsize, 0)) {
if (destsize > 0) {
/*
* Copy the leading portion of the string. The last
* character is subsequently overwritten with the NUL
* terminator, but the destination destsize is usually
* a multiple of a small power of two, so writing it
* twice should be more efficient than copying an odd
* number of bytes.
*/
memcpy(dest, src, destsize);
dest[destsize - 1] = '\0';
}
} else
/* Copy the string and its terminating NUL character. */
memcpy(dest, src, src_length + 1);
return src_length;
}
#endif /* HAVE_STRLCPY */
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