Added Args.GetBool helper

args.go

@@ -285,6 +285,19 @@ func (a *Args) GetUfloatOrZero(key string) float64 {
 	return f
 }
 
+// GetBool returns boolean value for the given key.
+//
+// true is returned for '1', 'y' and 'yes' values,
+// otherwise false is returned.
+func (a *Args) GetBool(key string) bool {
+	switch string(a.Peek(key)) {
+	case "1", "y", "yes":
+		return true
+	default:
+		return false
+	}
+}
+
 func visitArgs(args []argsKV, f func(k, v []byte)) {
 	for i, n := 0, len(args); i < n; i++ {
 		kv := &args[i]

args_test.go

@@ -164,6 +164,29 @@ func TestArgsWriteTo(t *testing.T) {
 	}
 }
 
+func TestArgsGetBool(t *testing.T) {
+	testArgsGetBool(t, "", false)
+	testArgsGetBool(t, "0", false)
+	testArgsGetBool(t, "n", false)
+	testArgsGetBool(t, "no", false)
+	testArgsGetBool(t, "1", true)
+	testArgsGetBool(t, "y", true)
+	testArgsGetBool(t, "yes", true)
+
+	testArgsGetBool(t, "123", false)
+	testArgsGetBool(t, "foobar", false)
+}
+
+func testArgsGetBool(t *testing.T, value string, expectedResult bool) {
+	var a Args
+	a.Parse("v=" + value)
+
+	result := a.GetBool("v")
+	if result != expectedResult {
+		t.Fatalf("unexpected result %v. Expecting %v for value %q", result, expectedResult, value)
+	}
+}
+
 func TestArgsUint(t *testing.T) {
 	var a Args
 	a.SetUint("foo", 123)