Util: Add delimiter support to the cut function

src/util/system.cpp

@@ -133,22 +133,22 @@ System System::operator||(System rhs)
 	return rhs;
 }
 
-// cut -f
+// cut -f -d
-System& System::cut(uint32_t field)
+System& System::cut(uint32_t field, char delimiter)
 {
 	exec();
 
-	return apply([&field](std::vector<std::string>& lines) {
+	return apply([&field, &delimiter](std::vector<std::string>& lines) {
 		for (auto& line : lines) {
 			size_t count = 1;
 			size_t index = 0;
 			while (index != std::string::npos) {
 				if (count == field) {
-					line = line.substr(0, line.find_first_of(" "));
+					line = line.substr(0, line.find_first_of(delimiter));
 					break;
 				}
 
-				index = line.find_first_of(" ");
+				index = line.find_first_of(delimiter);
 				line = line.substr(index + 1);
 				count++;
 			}

src/util/system.h

@@ -36,7 +36,7 @@ public:
 	System operator&&(System rhs);
 	System operator||(System rhs);
 
-	System& cut(uint32_t field);
+	System& cut(uint32_t field, char delimiter = '\t');
 	System& sort(bool unique = false);
 	System& tail(int32_t number, bool starting = false);
 	System& apply(LineCallback callback);