12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- /* Implement the strndup function.
- Copyright (C) 2005-2022 Free Software Foundation, Inc.
- Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
- This file is part of the libiberty library.
- Libiberty is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- Libiberty 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with libiberty; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
- Boston, MA 02110-1301, USA. */
- /*
- @deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n})
- Returns a pointer to a copy of @var{s} with at most @var{n} characters
- in memory obtained from @code{malloc}, or @code{NULL} if insufficient
- memory was available. The result is always NUL terminated.
- @end deftypefn
- */
- #include "ansidecl.h"
- #include <stddef.h>
- extern size_t strnlen (const char *s, size_t maxlen);
- extern PTR malloc (size_t);
- extern PTR memcpy (PTR, const PTR, size_t);
- char *
- strndup (const char *s, size_t n)
- {
- char *result;
- size_t len = strnlen (s, n);
- result = (char *) malloc (len + 1);
- if (!result)
- return 0;
- result[len] = '\0';
- return (char *) memcpy (result, s, len);
- }
|