From f61b2d289d0e6ec960e20ac5b59a0fe7dfe8740e Mon Sep 17 00:00:00 2001
From: Denis Kasak
Date: Sun, 28 Jun 2009 16:19:10 +0000
Subject: Changed Script::run() to accept a GPL2Program struct instead of a
 byte pointer and a length. Also, Script::run() now executes the GPL program
 until a gplend instruction rather than to the end of the whole program.
 Modified GameObject according to the new changes.

svn-id: r41927
---
 engines/draci/draci.cpp  |  2 +-
 engines/draci/game.cpp   | 18 ++++++++----------
 engines/draci/game.h     | 12 ++++++++----
 engines/draci/script.cpp | 15 ++++++---------
 engines/draci/script.h   | 14 +++++++++++++-
 5 files changed, 36 insertions(+), 25 deletions(-)

(limited to 'engines')

diff --git a/engines/draci/draci.cpp b/engines/draci/draci.cpp
index 7e73e3d4b2..5ace58c8bc 100644
--- a/engines/draci/draci.cpp
+++ b/engines/draci/draci.cpp
@@ -69,7 +69,7 @@ int DraciEngine::init() {
 	_screen = new Screen(this);
 	_font = new Font();
 	_mouse = new Mouse(this);
-	_game = new Game();
+	_game = new Game(this);
 	_script = new Script();
 
 	// Load default font
diff --git a/engines/draci/game.cpp b/engines/draci/game.cpp
index 7cceb0e854..9b8a2855ef 100644
--- a/engines/draci/game.cpp
+++ b/engines/draci/game.cpp
@@ -28,10 +28,11 @@
 #include "draci/draci.h"
 #include "draci/game.h"
 #include "draci/barchive.h"
+#include "draci/script.h"
 
 namespace Draci {
 
-Game::Game() {
+Game::Game(DraciEngine *vm) : _vm(vm) {
 	unsigned int i;
 	Common::String path("INIT.DFW");
 	
@@ -161,9 +162,9 @@ void Game::loadObject(uint16 objNum, GameObject *obj) {
 	memcpy(obj->_title, file->_data, file->_length);
 	
 	file = objArchive[objNum * 3 + 2];
-	obj->_program = new byte[file->_length];
-	memcpy(obj->_program, file->_data, file->_length);
-	obj->_progLen = file->_length;
+	obj->_program._bytecode = new byte[file->_length];
+	obj->_program._length = file->_length;
+	memcpy(obj->_program._bytecode, file->_data, file->_length);
 }
 	
 Game::~Game() {
@@ -176,12 +177,9 @@ Game::~Game() {
 }
 
 GameObject::~GameObject() { 
-	if (_seqTab) 
-		delete[] _seqTab; 
-	if (_title)
-		delete[] _title;
-	if (_program)
-		delete[] _program;
+	delete[] _seqTab; 
+	delete[] _title;
+	delete[] _program._bytecode;
 }
 
 } 
diff --git a/engines/draci/game.h b/engines/draci/game.h
index 5bd2074489..bdbb402795 100644
--- a/engines/draci/game.h
+++ b/engines/draci/game.h
@@ -27,16 +27,19 @@
 #define DRACI_GAME_H
 
 #include "common/str.h"
+#include "draci/script.h"
 
 namespace Draci {
 
+class DraciEngine;
+
 enum StructSizes {
 	personSize = sizeof(uint16) * 2 + sizeof(byte)
 };
 
 struct GameObject {
 	
-	GameObject() : _seqTab(NULL), _title(NULL), _program(NULL) {}
+	GameObject() : _seqTab(NULL), _title(NULL) {}
 	~GameObject();
 		
 	uint16 _init, _look, _use, _canUse;
@@ -49,9 +52,8 @@ struct GameObject {
 	uint16 _absNum;
 	byte _animObj;
 	uint16 *_seqTab;
-	byte *_program;
+	GPL2Program _program;
 	byte *_title;
-	uint32 _progLen;
 };
 
 struct GameInfo {
@@ -76,10 +78,12 @@ struct Person {
 class Game {
 
 public:
-	Game();
+	Game(DraciEngine *vm);
 	~Game();
 
 private:
+	DraciEngine *_vm;
+	
 	GameInfo *_info;
 	Person *_persons;
 	uint16 *_dialogOffsets;
diff --git a/engines/draci/script.cpp b/engines/draci/script.cpp
index c04100af78..751aadc3f3 100644
--- a/engines/draci/script.cpp
+++ b/engines/draci/script.cpp
@@ -246,8 +246,7 @@ GPL2Command *Script::findCommand(byte num, byte subnum) {
 
 /**
  * @brief GPL2 bytecode disassembler
- * @param gplcode A pointer to the bytecode
- * @param len Length of the bytecode
+ * @param program GPL program in the form of a GPL2Program struct
  *
  * GPL2 is short for Game Programming Language 2 which is the script language
  * used by Draci Historie. This is a simple disassembler for the language.
@@ -275,10 +274,11 @@ GPL2Command *Script::findCommand(byte num, byte subnum) {
  *	value comes from.
  */
 
-int Script::run(byte *gplcode, uint16 len) {
-	Common::MemoryReadStream reader(gplcode, len);
+int Script::run(GPL2Program program) {
+	Common::MemoryReadStream reader(program._bytecode, program._length);
 
-	while (!reader.eos()) {
+	GPL2Command *cmd;
+	do {
 		// read in command pair
 		uint16 cmdpair = reader.readUint16BE();
 
@@ -288,7 +288,6 @@ int Script::run(byte *gplcode, uint16 len) {
 		// extract low byte, i.e. the command subnumber
 		byte subnum = cmdpair & 0xFF;
 
-		GPL2Command *cmd;
 		if ((cmd = findCommand(num, subnum))) {
 
 			// Print command name
@@ -308,9 +307,7 @@ int Script::run(byte *gplcode, uint16 len) {
 			debugC(2, kDraciBytecodeDebugLevel, "Unknown opcode %hu, %hu",
 				num, subnum);
 		}
-
-
-	}
+	} while (cmd->_name != "gplend");
 
 	return 0;
 }
diff --git a/engines/draci/script.h b/engines/draci/script.h
index 4ad305c209..55712e99f2 100644
--- a/engines/draci/script.h
+++ b/engines/draci/script.h
@@ -50,10 +50,22 @@ struct GPL2Command {
 	int _paramTypes[kMaxParams];
 };
 
+/** 
+ *  A convenience data type that holds both the actual bytecode and the
+ *  length of the bytecode. Passed to Script::run().
+ */
+
+struct GPL2Program {
+	GPL2Program() : _bytecode(NULL), _length(0) {}
+	
+	byte *_bytecode;
+	uint16 _length;
+};
+
 class Script {
 
 public:
-	int run(byte *gplcode, uint16 len);
+	int run(GPL2Program program);
 	
 private:
 	GPL2Command *findCommand(byte num, byte subnum);
-- 
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