src: add getopt option parser

deps/getopt/getopt.gyp

@@ -0,0 +1,15 @@
+{
+  'targets': [
+    {
+      'target_name': 'getopt',
+      'type': 'static_library',
+      'sources': [
+        'getopt.h',
+        'getopt_long.c'
+      ],
+      'defines': [
+        'REPLACE_GETOPT'
+      ]
+    }
+  ]
+}

deps/getopt/getopt.h

@@ -0,0 +1,100 @@
+/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
+/*	$FreeBSD$ */
+
+/*-
+ * 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_
+
+#ifdef WIN32
+#ifdef __cplusplus
+#define __BEGIN_DECLS extern "C" {
+#define __END_DECLS }
+#else
+#define __BEGIN_DECLS
+#define __END_DECLS
+#endif
+
+#ifdef _MSC_VER
+/* ignore MSVC++ warnings that are annoying and hard to remove:
+ 4702 unreachable code
+ (there is an unreachable assert(0) in case somehow it is reached)
+ */
+#pragma warning( disable : 4702 )
+#endif
+
+#else /* WIN32 */
+#include <sys/cdefs.h>
+#endif
+
+/*
+ * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
+ * getopt() is declared here too for GNU programs.
+ */
+#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;
+
+	/* add description for usage */
+	const char *desc;
+};
+
+__BEGIN_DECLS
+int	getopt_long(int, char * const *, const char *,
+	const struct option *, int *);
+int	getopt_long_only(int, char * const *, const char *,
+	const struct option *, int *);
+#ifndef _GETOPT_DECLARED
+#define	_GETOPT_DECLARED
+int	 getopt(int, char * const [], const char *);
+
+extern char *optarg;			/* getopt(3) external variables */
+extern int optind, opterr, optopt;
+#endif
+#ifndef _OPTRESET_DECLARED
+#define	_OPTRESET_DECLARED
+extern int optreset;			/* getopt(3) external variable */
+#endif
+__END_DECLS
+
+#endif /* !_GETOPT_H_ */