Created the loadGameMap() function, still incomplete

Although the overall logic of this function is finished, I still need to
write the callbacks for RegionPager's onNew and onDelete.

I've also tested this using a hand written save/index file. I've written
up a map file format by hand, and I'll be implementing it over the next
few commits.

common/map_loader.cpp

@@ -0,0 +1,79 @@
+#include "map_loader.hpp"
+
+#include "utility.hpp"
+
+#include <fstream>
+#include <stdexcept>
+
+void loadGameMap(std::string mapPathName, RegionPager* pager, std::list<TileSheet>* sheetList) {
+	//open the index file
+	std::ifstream indexFile(mapPathName + "\\index");
+	if (!indexFile.is_open()) {
+		throw(std::runtime_error(std::string("Failed to open game map: ") + mapPathName));
+	}
+
+	//read each part of the metadata header
+	std::string buffer, knownName;
+	int sheetCount = -1, rangeEnd = -1, regionWidth = -1, regionHeight = -1;
+
+	getline(indexFile, knownName);
+
+	if (knownName != truncatePath(mapPathName)) {
+		//probably not needed, I'll losen this down the road
+		throw(std::runtime_error("Internal and external map names do not match"));
+	}
+
+	getline(indexFile, buffer, ',');
+	sheetCount = to_integer_custom(buffer);
+
+	getline(indexFile, buffer, ',');
+	rangeEnd = to_integer_custom(buffer);
+
+	getline(indexFile, buffer, ',');
+	regionWidth = to_integer_custom(buffer);
+
+	getline(indexFile, buffer);
+	regionHeight = to_integer_custom(buffer);
+
+	//setup the pager
+	pager->GetRegions()->clear();
+	pager->SetWidth(regionWidth);
+	pager->SetHeight(regionHeight);
+	pager->SetOnNew([](Region* const ptr) {
+		//TODO
+	});
+	pager->SetOnDelete([](Region* const ptr) {
+		//TODO
+	});
+
+	//load all of the tile sheets
+	sheetList->clear();
+	for (int i = 0; i < sheetCount; i++) {
+		sheetList->push_back(TileSheet());
+
+		//get the name, width & height
+		std::string sheetName;
+		getline(indexFile, sheetName, ',');
+		getline(indexFile, buffer, ',');
+		int w = to_integer_custom(buffer);
+		getline(indexFile, buffer, ',');
+		int h = to_integer_custom(buffer);
+
+		//load
+		sheetList->back().LoadSurface(std::string("rsc\\graphics\\tilesets\\") + sheetName, w, h);
+
+		//set the range
+		getline(indexFile, buffer, ',');
+		sheetList->back().SetBegin(to_integer_custom(buffer));
+		getline(indexFile, buffer);
+		sheetList->back().SetEnd(to_integer_custom(buffer));
+	}
+	TileSheet::SetRangeEnd(rangeEnd);
+
+	//clean up
+	indexFile.close();
+}
+
+void saveGameMap(std::string mapPathName, RegionPager* pager, std::list<TileSheet>* sheetList) {
+	//TODO
+}

common/map_loader.hpp

@@ -0,0 +1,15 @@
+#ifndef MAPLOADER_HPP_
+#define MAPLOADER_HPP_
+
+#include "region_pager.hpp"
+#include "tile_sheet.hpp"
+
+#include <list>
+#include <string>
+
+/* Given the map name and pointers to containers, this is a generic loading system
+*/
+void loadGameMap(std::string mapPathName, RegionPager* pager, std::list<TileSheet>* sheetList);
+void saveGameMap(std::string mapPathName, RegionPager* pager, std::list<TileSheet>* sheetList);
+
+#endif

common/region_pager.cpp

@@ -21,7 +21,10 @@
 */
 #include "region_pager.hpp"
 
+#include "utility.hpp"
+
 #include <stdexcept>
+#include <string>
 
 RegionPager::RegionPager() {
 	//
@@ -110,7 +113,7 @@ void RegionPager::DrawTo(SDL_Surface* const dest, std::list<TileSheet>* const sh
 			}
 
 			//reaching this point without rendering means that the tile is invalid
-			throw(std::runtime_error("Undrawable tile encountered"));
+			throw(std::runtime_error(std::string("Undrawable tile encountered: ") + to_string_custom(tileIter.tileIndex)));
 
 		continueTile: ;
 			//continue with the next tile

common/region_pager.hpp

@@ -47,6 +47,9 @@ public:
 	void SetOnNew(regionCallback_t f) { onNew = f; }
 	void SetOnDelete(regionCallback_t f) { onDelete = f; }
 
+	//TODO
+	//void Prune(int camX, int camY, int screenW, int screenH);
+
 	//accessors and mutators
 	int SetWidth(int i) { return regionWidth = i; }
 	int SetHeight(int i) { return regionHeight = i; }

common/utility.cpp

@@ -51,3 +51,9 @@ std::string to_string_custom(int i) {
 	snprintf(buffer, 20, "%d", i);
 	return std::string(buffer);
 }
+
+int to_integer_custom(std::string s) {
+	int ret = 0;
+	sscanf(s.c_str(), "%d", &ret);
+	return ret;
+}

common/utility.hpp

@@ -27,7 +27,9 @@
 int snapToBase(int base, int x);
 std::string truncatePath(std::string pathname);
 
-//fixing a known bug in g++
+//fixing known bugs in g++
 std::string to_string_custom(int i);
 
+int to_integer_custom(std::string);
+
 #endif

editor/editor_scene.cpp

@@ -59,11 +59,20 @@ EditorScene::EditorScene() {
 //	});
 
 	//32 * 32 sized tiles
-	pager.SetWidth(32*4);
-	pager.SetHeight(32*4);
+//	pager.SetWidth(32*4);
+//	pager.SetHeight(32*4);
 
-	sheetList.push_front(TileSheet());
-	sheetList.front().LoadSurface("rsc\\graphics\\tilesets\\terrain.bmp", 32, 32);
+//	sheetList.push_front(TileSheet());
+//	sheetList.front().LoadSurface("rsc\\graphics\\tilesets\\terrain.bmp", 32, 32);
+
+	loadGameMap("rsc\\maps\\mappy", &pager, &sheetList);
+
+	cout << "Region Width: " << pager.GetWidth() << endl;
+	cout << "Region Height: " << pager.GetHeight() << endl;
+
+	for (auto& it : sheetList) {
+		cout << it.GetName() << ": " << it.GetBegin() << ", " << it.GetEnd() << endl;
+	}
 }
 
 EditorScene::~EditorScene() {
@@ -140,13 +149,14 @@ void EditorScene::MouseButtonDown(SDL_MouseButtonEvent const& button) {
 			snapToBase(pager.GetHeight(), button.y - camera.y)
 		);
 
+		//TODO: find the tileset matching this value, and then use it's width & height for param 4 & 5
 		ptr->NewTileA({
-			snapToBase(32, button.x - camera.x),
-			snapToBase(32, button.y - camera.y),
-			0,
-			32,
-			32,
-			0
+			snapToBase(32, button.x - camera.x), //x
+			snapToBase(32, button.y - camera.y), //y
+			0, //depth
+			32, //width (from tileset)
+			32, //height (from tileset)
+			0 //value
 		});
 	}
 }
@@ -156,7 +166,7 @@ void EditorScene::MouseButtonUp(SDL_MouseButtonEvent const& button) {
 	menuBar.MouseButtonUp(button, &entry, &drop);
 
 #ifdef DEBUG
-	cout << "Menu: (" << entry << "," << drop << ")" << endl;
+	cout << "Menu Bar: (" << entry << "," << drop << ")" << endl;
 #endif
 
 	//manage input from the menu bar

editor/editor_scene.hpp

@@ -31,6 +31,8 @@
 #include "raster_font.hpp"
 #include "menu_bar.hpp"
 
+#include "map_loader.hpp"
+
 #include <list>
 
 class EditorScene : public BaseScene {