getopt_long: Copy over the implementation from netbsd.

Windows does not have a getopt_long function. This commit
copies over the getopt_long implementation from netbsd with
some minor modifications and is used only on Windows platform.

Modifications on top of the version in NetBSD repo.
* Remove header files not available in Visual Studio.
* Remove some unwanted #defines.
* Add Open vSwitch specific header files like config.h, vlog.h, util.h
* Add the following #define's
define __UNCONST(a)    ((void *)(unsigned long)(const void *)(a))
define _DIAGASSERT(q) ovs_assert(q)
define warnx VLOG_WARN
* Add extern declaration in getopt.h for optarg, optind.

Signed-off-by: Gurucharan Shetty <[email protected]>
Acked-by: Ben Pfaff <[email protected]>

COPYING

@@ -22,6 +22,10 @@ Public License, version 2.
 File build-aux/cccl is licensed under the GNU General Public
 License, version 2.
 
+The following files are licensed under the 2-clause BSD license.
+    include/windows/getopt.h
+    lib/getopt_long.c
+
 Files under the xenserver directory are licensed on a file-by-file
 basis.  Refer to each file for details.
 

debian/copyright.in

@@ -14,6 +14,7 @@ Upstream Copyright Holders:
 	and authors listed above.
 	Copyright (c) 2011 Gaetano Catalli
 	Copyright (C) 2000-2003 Geoffrey Wossum ([email protected])
+	Copyright (C) 2000 The NetBSD Foundation, Inc.
 
 License:
 
@@ -78,6 +79,11 @@ License:
 
 	build-aux/cccl
 
+* The following files are licensed under the 2-clause BSD license.
+
+	lib/getopt_long.c
+	include/windows/getopt.h
+
 * The following components are dual-licensed under the
   GNU General Public License version 2 and the Apache License Version 2.0.
 

include/windows/automake.mk

@@ -6,5 +6,6 @@
 # without warranty of any kind.
 
 noinst_HEADERS += \
-	include/windows/windefs.h \
-	include/windows/syslog.h
+	include/windows/getopt.h \
+	include/windows/syslog.h \
+	include/windows/windefs.h

include/windows/getopt.h

@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * 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 _GETOPT_H_
+#define _GETOPT_H_
+
+#include <unistd.h>
+
+extern char *optarg;
+extern int optind;
+
+/*
+ * Gnu like getopt_long() and BSD4.4 getsubopt()/optreset extensions
+ */
+#define no_argument        0
+#define required_argument  1
+#define optional_argument  2
+
+struct option {
+	/* name of long option */
+	const char *name;
+	/*
+	 * one of no_argument, required_argument, and optional_argument:
+	 * whether option takes an argument
+	 */
+	int has_arg;
+	/* if not NULL, set *flag to val when option found */
+	int *flag;
+	/* if flag not NULL, value to set *flag to; else return value */
+	int val;
+};
+
+int getopt_long(int, char * const *, const char *,
+    const struct option *, int *);
+
+#endif /* !_GETOPT_H_ */

lib/automake.mk

@@ -236,10 +236,14 @@ lib_libopenvswitch_la_SOURCES = \
 	lib/vswitch-idl.h \
 	lib/vtep-idl.c \
 	lib/vtep-idl.h
+
 if WIN32
-lib_libopenvswitch_la_SOURCES += lib/latch-windows.c
+lib_libopenvswitch_la_SOURCES += \
+	lib/getopt_long.c \
+	lib/latch-windows.c
 else
-lib_libopenvswitch_la_SOURCES += lib/latch.c
+lib_libopenvswitch_la_SOURCES += \
+	lib/latch.c
 endif
 
 EXTRA_DIST += \