HDB: Add structs and functions for Lua Globals

2 files changed, 76 insertions, 0 deletions

diff --git a/engines/hdb/lua-script.cpp b/engines/hdb/lua-script.cpp
index da1f91ea85..337496b75b 100644
--- a/engines/hdb/lua-script.cpp
+++ b/engines/hdb/lua-script.cpp
@@ -86,6 +86,64 @@ bool LuaScript::loadLua(const char *name) {
 	return true;
 }
 
+void LuaScript::saveGlobalNumber(const char *global, double value) {
+	// see if global already exists; if so, overwrite it.
+	for (uint i = 0; i < _globals.size(); i++) {
+		if (!scumm_stricmp(global, _globals[i]->global)) {
+			_globals[i]->valueOrString = 0;
+			_globals[i]->value = value;
+			return;
+		}
+	}
+
+	Global *g = new Global;
+	strcpy(g->global, global);
+	g->valueOrString = 0;
+	g->value = value;
+
+	_globals.push_back(g);
+}
+
+void LuaScript::saveGlobalString(const char *global, const char *string) {
+	if (!string)
+		return;
+
+	// see if global already exists; if so, overwrite it.
+	for (uint i = 0; i < _globals.size(); i++) {
+		if (!scumm_stricmp(global, _globals[i]->global)) {
+			_globals[i]->valueOrString = 1;
+			strcpy(_globals[i]->string, string);
+			return;
+		}
+	}
+
+	Global *g = new Global;
+	strcpy(g->global, global);
+	g->valueOrString = 1;
+	strcpy(g->string, string);
+
+	_globals.push_back(g);
+}
+
+void LuaScript::loadGlobal(const char *global) {
+	for (uint i = 0; i < _globals.size(); i++) {
+		if (!scumm_stricmp(global, _globals[i]->global)) {
+			if (_globals[i]->valueOrString) {
+				lua_pushstring(_state, _globals[i]->string);
+				lua_setglobal(_state, _globals[i]->global);
+			} else {
+				lua_pushnumber(_state, _globals[i]->value);
+				lua_setglobal(_state, _globals[i]->global);
+			}
+			return;
+		}
+	}
+}
+
+void LuaScript::purgeGlobals() {
+	_globals.clear();
+}
+
 void LuaScript::setLuaGlobalValue(const char *name, int value) {
 	if (!_state)
 		return;
diff --git a/engines/hdb/lua-script.h b/engines/hdb/lua-script.h
index 4f2ffd2d09..b84a19da7d 100644
--- a/engines/hdb/lua-script.h
+++ b/engines/hdb/lua-script.h
@@ -37,12 +37,28 @@ enum {
 	kCameraYOff = (32 * 2 + 16)		// 2.50 Tiles Extra
 };
 
+struct Global {
+	char	global[32];			// name of global variable
+	int		valueOrString;	// value = 0, string = 1
+	double	value;				// value
+	char	string[32];			// string
+
+	Global() : valueOrString(0), value(0) {
+		global[0] = 0;
+		string[0] = 0;
+	}
+};
+
 class LuaScript {
 public:
 	LuaScript();
 	~LuaScript();
 
 	bool loadLua(const char *name);
+	void saveGlobalNumber(const char *global, double value);
+	void saveGlobalString(const char *global, const char *string);
+	void loadGlobal(const char *global);
+	void purgeGlobals();
 
 	bool init();
 	bool initScript(Common::SeekableReadStream *stream, const char *scriptName, int32 length);
@@ -74,6 +90,8 @@ private:
 	bool registerExtensions();
 	void stripComments(char *chunk);
 	void addPatches(Common::String &chunk, const char *scriptName);
+
+	Common::Array<Global *> _globals;
 };
 
 void lua_printstack(lua_State *L);