add more types to compare

alib2std/src/extensions/compare.hpp

@@ -20,6 +20,27 @@ struct compare<bool> {
 	}
 };
+template<>
+struct compare<char> {
+	int operator()(char first, char second) const {
+		return first - second;
+	}
+};
+
+template<>
+struct compare<short> {
+	int operator()(short first, short second) const {
+		return first - second;
+	}
+};
+
+template<>
+struct compare<unsigned> {
+	int operator()(unsigned first, unsigned second) const {
+		return first - second;
+	}
+};
+
 template<>
 struct compare<int> {
 	int operator()(int first, int second) const {
@@ -27,10 +48,39 @@ struct compare<int> {
 	}
 };
+template<>
+struct compare<long> {
+	int operator()(long first, long second) const {
+		if ( first < second )
+			return -1;
+		else if ( first > second )
+			return 1;
+		else
+			return 0;
+	}
+};
+
+template<>
+struct compare<long long> {
+	int operator()(long long first, long long second) const {
+		if ( first < second )
+			return -1;
+		else if ( first > second )
+			return 1;
+		else
+			return 0;
+	}
+};
+
 template<>
 struct compare<double> {
 	int operator()(double first, double second) const {
-		return first - second;
+		if ( first < second )
+			return -1;
+		else if ( first > second )
+			return 1;
+		else
+			return 0;
 	}
 };