Add stringlist module from NetBSD

include/bsd/stringlist.h

@@ -0,0 +1,54 @@
+/*	$NetBSD: stringlist.h,v 1.6 2006/07/27 15:37:19 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1994 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _STRINGLIST_H
+#define _STRINGLIST_H
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+/*
+ * Simple string list
+ */
+typedef struct _stringlist {
+	char	**sl_str;
+	size_t	  sl_max;
+	size_t	  sl_cur;
+} StringList;
+
+__BEGIN_DECLS
+StringList	*sl_init(void);
+int		 sl_add(StringList *, char *);
+void		 sl_free(StringList *, int);
+char		*sl_find(StringList *, const char *);
+int		 sl_delete(StringList *, const char *, int);
+__END_DECLS
+
+#endif /* _STRINGLIST_H */