From 59a0e24c675862a7bc8cec56f64fe6791fed536c Mon Sep 17 00:00:00 2001
From: Mirek Kratochvil <exa.exa@gmail.com>
Date: Fri, 11 Jan 2013 11:33:17 +0100
Subject: [PATCH] main: basic option processing

---
 src/main.cpp | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 97d5d7d..16df632 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -16,8 +16,82 @@
  * along with Codecrypt. If not, see <http://www.gnu.org/licenses/>.
  */
 
-int main()
+#include <iostream>
+
+/*
+ * main module. Parse options, fire up stuff, pass commands to it.
+ */
+
+#define out(x) std::cout << x << std::endl
+#define outeol std::cout << std::endl
+#define err(x) std::cerr << x << std::endl
+#define erreol std::cerr << std::endl
+
+void print_version()
 {
+	out ("codecrypt " PACKAGE_VERSION);
+}
+
+void print_help (char*pname)
+{
+	print_version();
+	outeol;
+	out ("Usage: " << pname << " [options]");
+	outeol;
+	out ("Options consist of:");
+	out (" -h, --help         display this help");
+	out (" -V,--version          display version information");
+}
+
+#include <getopt.h>
+
+int main (int argc, char**argv)
+{
+	bool do_help = false;
+	bool do_version = false;
+	bool has_opt = false;
+
+	//process options
+	int c, option_index;
+	for (;;) {
+		static struct option long_opts[] = {
+			{"help",	0,	0,	'h' },
+			{"version",	0,	0,	'V' },
+			{0,		0,	0,	0 }
+		};
+
+		c = getopt_long (argc, argv, "hV", long_opts, &option_index);
+		if (c == -1) break;
+
+		has_opt = true;
+		switch (c) {
+		case '?':
+		case ':':
+		case 'h':
+			do_help = true;
+			break;
+		case 'V':
+			do_version = true;
+			break;
+		default: //which doesn't just happen.
+			break;
+		}
+	}
+
+	if (optind != argc) {
+		err (argv[0] << ": unmatched non-option parameters");
+		do_help = true;
+	}
+
+	if ( (!has_opt) || do_help) {
+		print_help (argv[0]);
+		return 0;
+	}
+
+	if (do_version) {
+		print_version();
+		return 0;
+	}
 	return 0;
 }