Replace xine_private_strndup() implementation with NetBSD version.

As the source file for xine_private_strndup() does not provide a licence
header, replace it with a safe copy (licence wise) taken from NetBSD CVS.

The implementation is licensed under 3-clause BSD licence, that is
compatible with GPL-2 or later.

1 files changed, 50 insertions, 10 deletions

diff --git a/lib/strndup.c b/lib/strndup.c
index 9f347db87..1e01aa018 100644
--- a/lib/strndup.c
+++ b/lib/strndup.c
@@ -1,16 +1,56 @@
+/*	$NetBSD: strndup.c,v 1.4 2007/07/03 12:11:09 nakayama Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * Modified for xine project.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
 #include "config.h"
 
-#ifdef HAVE_STDLIB_H
+#include <errno.h>
 #include <stdlib.h>
-#endif
-
 #include <string.h>
 
-char *xine_private_strndup(const char *s, size_t n) {
-  char *ret;
-  
-  ret = malloc (n + 1);
-  strncpy(ret, s, n);
-  ret[n] = '\0';
-  return ret;
+char *
+xine_private_strndup(const char *str, size_t n)
+{
+	size_t len;
+	char *copy;
+
+	if (!str)
+		return (NULL);
+
+	for (len = 0; len < n && str[len]; len++)
+		continue;
+
+	if (!(copy = malloc(len + 1)))
+		return (NULL);
+	memcpy(copy, str, len);
+	copy[len] = '\0';
+	return (copy);
 }