| /* Implement the strndup function. |
| Copyright (C) 2005-2020 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); |
| } |