Inverted control flow, engine as library

luprex/core/cpp/util.hpp

@@ -3,6 +3,7 @@
 
 #include <string>
 #include <set>
+#include <map>
 #include <algorithm>
 #include <sstream>
 #include <ostream>
@@ -21,7 +22,8 @@ enum WorldType {
 };
 
 using StringVec = std::vector<std::string>;
-using StringMap = std::map<std::string, std::string>;
+using StringPair = std::pair<std::string, std::string>;
+using LuaSource = std::vector<StringPair>;
 using HashValue = std::pair<uint64_t, uint64_t>;
 using IdVector = std::vector<int64_t>;
 
@@ -73,14 +75,8 @@ std::string trim(std::string s);
 // Calculate distance between two points
 double distance_squared(double x1, double y1, double x2, double y2);
 
-// Read a file as one big string.
-std::string get_file_contents(const std::string &path);
-
-// Read a file as a vector of lines.
-StringVec   get_file_lines(const std::string &path);
-
-// Get a file's fingerprint - ie, size and modification time.
-std::string get_file_fingerprint(const std::string &path);
+// Read the lua source code from the specified directory.
+LuaSource read_lua_source(const std::string &directory);
 
 // An XYZ coordinate, general purpose.
 struct XYZ {