/* Implement the strndup function. Copyright (C) 2005 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 strlen (const char*); 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 = strlen (s); if (n < len) len = n; result = (char *) malloc (len + 1); if (!result) return 0; result[len] = '\0'; return (char *) memcpy (result, s, len); }