1 files changed, 48 insertions, 0 deletions
diff --git a/src/supplemental/util/options.h b/src/supplemental/util/options.h
new file mode 100644
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+++ b/src/supplemental/util/options.h
@@ -0,0 +1,48 @@
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#ifndef NNG_SUPPLEMENTAL_UTIL_OPTIONS_H
+#define NNG_SUPPLEMENTAL_UTIL_OPTIONS_H
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// This is a relatively simple "options parsing" library, used to
+// parse command line options.  We would use getopt(3), but there are
+// two problems with getopt(3).  First, it isn't available on all
+// platforms (especially Win32), and second, it doesn't support long
+// options.  We *exclusively* support long options.  POSIX style
+// short option clustering is *NOT* supported.
+
+struct nng_optspec {
+	const char *o_name;  // Long style name (may be NULL for short only)
+	int         o_short; // Short option (no clustering!)
+	int         o_val;   // Value stored on a good parse (>0)
+	bool        o_arg;   // Option takes an argument if true
+};
+
+typedef struct nng_optspec nng_optspec;
+
+// Call with *optidx set to 1 to start parsing for a standard program.
+// The val will store the value of the matched "o_val", optarg will be
+// set to match the option string, and optidx will be increment appropriately.
+// Returns -1 when the end of options is reached, 0 on success, or
+// NNG_EINVAL if the option parse is invalid for any reason.
+NNG_DECL int nng_opts_parse(int argc, const char **argv,
+    const nng_optspec *opts, int *val, const char **optarg, int *optidx);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NNG_SUPPLEMENTAL_UTIL_OPTIONS_H
+\ No newline at end of file