added static compare function to core::Label

2 files changed, 16 insertions, 0 deletions

diff --git a/src/core/label.cc b/src/core/label.cc
index d7dabc2..7f21f70 100644
--- a/src/core/label.cc
+++ b/src/core/label.cc
@@ -8,6 +8,17 @@
 
 namespace core {
 
+bool Label::compare(const Label *first, const Label *second)
+{
+	if (first->label() < second->label()) {
+		return true;
+	} else if (first->label() > second->label()) {
+		return false;
+	} else {
+		return (first->label().length() < second->label().length());
+	}
+}
+
 Label::Label()
 {
 }
diff --git a/src/core/label.h b/src/core/label.h
index 2ca40f7..582ea32 100644
--- a/src/core/label.h
+++ b/src/core/label.h
@@ -44,6 +44,11 @@ public:
 	
 	void set_name(const char *name);
 
+	/**
+	 * @brief static compare function for std::container sort functions
+	 */
+	static bool compare(const Label *first, const Label *second);
+	
 private:
 	std::string		labelstr;
 	std::string		namestr;