From 7fbb06045f9e5c0b7e55a0410f37ac0ddd4bd54d Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Fri, 4 Feb 2022 15:48:04 +0100
Subject: implement option handling

---
 src/srcut.cpp | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/srcut.cpp b/src/srcut.cpp
index 8c59440..44131a0 100644
--- a/src/srcut.cpp
+++ b/src/srcut.cpp
@@ -3,6 +3,7 @@
 #include <map>
 #include <sstream>
 #include <string>
+#include <unistd.h>
 #include <vector>
 
 using namespace std;
@@ -103,11 +104,34 @@ print(ostream& os, const string& key, const map<string, vector<string>>& contain
 int
 main(int argc, char* argv[])
 {
+	int show_tags = 0;
+	int ch;
+
+	while ( (ch = getopt(argc, argv, "t")) != -1 ) {
+		switch ( ch ) {
+		case 't':
+			show_tags = 1;
+			break;
+		default:
+			cerr << "unbekannte option" << endl;
+			return EXIT_FAILURE;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
 	map<string, vector<string>> container;
 
 	cin >> container;
 
-	for ( int i = 1; i < argc; ++i ) {
-		print(cout, argv[i], container);
+	if ( show_tags ) {
+		for ( const auto& it: container ) {
+			cout << it.first << endl;
+		}
+	}
+	else {
+		for ( int i = 0; i < argc; ++i ) {
+			print(cout, argv[i], container);
+		}
 	}
 }
-- 
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