added missing files (part 2)

src/util/command_line.h

@@ -0,0 +1,41 @@
+#ifndef UTIL_COMMAND_LINE_H_
+#define UTIL_COMMAND_LINE_H_
+
+#include <string>
+#include <iostream>
+#include <stdexcept>
+#include "../files/engine_paths.h"
+
+class ArgsReader {
+	int argc;
+	char** argv;
+	int pos = 0;
+	const char* last = "";
+public:
+	ArgsReader(int argc, char** argv) : argc(argc), argv(argv) {}
+
+	void skip() {
+		pos++;
+	}
+
+	bool hasNext() const {
+		return pos < argc;
+	}
+
+	bool isKeywordArg() const {
+		return last[0] == '-';
+	}
+
+	std::string next() {
+		if (pos >= argc) {
+			throw std::runtime_error("unexpected end");
+		}
+		last = argv[pos];
+		return argv[pos++];
+	}
+};
+
+/* @return false if engine start can*/
+extern bool parse_cmdline(int argc, char** argv, EnginePaths& paths);
+
+#endif // UTIL_COMMAND_LINE_H_