libiberty.h (xstrndup): Declare.

include:
	* libiberty.h (xstrndup): Declare.

libiberty:
	* Makefile.in (CFILES): Add strndup.c and xstrndup.c.
	(REQUIRED_OFILES): Add xstrndup.o.
	(CONFIGURED_OFILES): Add strndup.o.
	Regenerate dependencies.

	* configure.ac (funcs, AC_CHECK_FUNCS): Add strndup.

	* strndup.c, xstrndup.c: New.

	* config.in, configure, functions.texi: Regenerate.

From-SVN: r97034

1 files changed, 61 insertions, 0 deletions

diff --git a/libiberty/strndup.c b/libiberty/strndup.c
new file mode 100644
index 0000000..3d6b93d
--- /dev/null
+++ b/libiberty/strndup.c
@@ -0,0 +1,61 @@
+/* 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., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, 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"
+#ifdef ANSI_PROTOTYPES
+#include <stddef.h>
+#else
+#define size_t unsigned long
+#endif
+
+extern size_t	strlen PARAMS ((const char*));
+extern PTR	malloc PARAMS ((size_t));
+extern PTR	memcpy PARAMS ((PTR, const PTR, size_t));
+
+char *
+strndup(s, n)
+     const char *s;
+     size_t n;
+{
+  char *result;
+  size_t len = strlen (s);
+
+  if (n < len)
+    len = n;
+
+  result = malloc (len + 1);
+  if (!result)
+    return 0;
+
+  result[len] = '\0';
+  return memcpy (result, s, len);
+}