--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/ai/squirrel.cpp	Thu Mar 15 22:28:14 2007 +0000
@@ -0,0 +1,216 @@
+/* $Id$ */
+
+/** @file squirrel.cpp allows loading squirrel scripts to control an AI */
+
+#include "../../stdafx.h"
+#include "../../debug.h"
+#include "../../openttd.h"
+#include "../../string.h"
+#include "../../fios.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef _UNICODE
+/* Disable unicode for squirrel to allow compilation with MINGW
+ * and simplify coding for WIN32 (squirrel headers miss a lot of "string" functions)
+ */
+#undef _UNICODE
+#endif
+#include <squirrel.h>
+#include "../../squirrel.hpp"
+#include "../../squirrel_helper.hpp"
+#include "../../squirrel_class.hpp"
+#include "../core/ai_factory.hpp"
+#include "../core/ai_controller.hpp"
+#include "squirrel.hpp"
+
+/* Convert all AI related classes to Squirrel data */
+#define DEFINE_SQUIRREL_CLASS
+#include "../core/ai_base.hpp"
+#include "../core/ai_cargo.hpp"
+#include "../core/ai_controller.hpp"
+#include "../core/ai_company.hpp"
+#include "../core/ai_industry.hpp"
+#include "../core/ai_map.hpp"
+#include "../core/ai_town.hpp"
+
+static FSquirrel iFSquirrel; ///< Tell the AI-core that we have an AI with which we like to play.
+
+/**
+ * Our tiny wrapper between C++ and Squirrel.
+ */
+class AIFactorySquirrel: public AIFactoryBase {
+public:
+	Squirrel *engine;
+	HSQOBJECT SQ_instance;
+	char *script_name;
+
+	~AIFactorySquirrel();
+
+	/* virtual */ const char   *GetAuthor()      { return this->engine->CallStringMethod (this->SQ_instance, "GetAuthor"); }
+	/* virtual */ const char   *GetName()        { return this->engine->CallStringMethod (this->SQ_instance, "GetName"); }
+	/* virtual */ const char   *GetDescription() { return this->engine->CallStringMethod (this->SQ_instance, "GetDescription"); }
+	/* virtual */ int           GetVersion()     { return this->engine->CallIntegerMethod(this->SQ_instance, "GetVersion"); }
+	/* virtual */ const char   *GetDate()        { return this->engine->CallStringMethod (this->SQ_instance, "GetDate"); }
+	/* virtual */ AIController *CreateInstance();
+
+	/**
+	 * Register Squirrel script to the Factory.
+	 */
+	void RegisterSquirrel()        { this->RegisterFactory(this->GetName()); }
+
+	/**
+	 * Check if a method exists in the script.
+	 */
+	void CheckMethods(AIFactorySquirrel *fbase, SQInteger *res, const char *name);
+};
+
+AIFactorySquirrel::~AIFactorySquirrel()
+{
+	free(this->script_name);
+}
+
+void AIFactorySquirrel::CheckMethods(AIFactorySquirrel *fbase, SQInteger *res, const char *name)
+{
+	if (!fbase->engine->MethodExists(fbase->SQ_instance, name)) {
+		char error[1024];
+		snprintf(error, sizeof(error), "Missing method '%s' for FactoryClass", name);
+		fbase->engine->ThrowError(error);
+		*res = SQ_ERROR;
+	}
+}
+
+SQInteger FSquirrel::FactoryConstructor(HSQUIRRELVM vm)
+{
+	AIFactorySquirrel *fbase = new AIFactorySquirrel();
+	SQInteger res = 0;
+
+	Squirrel::GetInstance(vm, &fbase->SQ_instance);
+	fbase->engine = ((FSquirrel *)Squirrel::GetGlobalPointer(vm))->engine;
+
+	/* Check if all needed fields are there */
+	fbase->CheckMethods(fbase, &res, "GetAuthor");
+	fbase->CheckMethods(fbase, &res, "GetName");
+	fbase->CheckMethods(fbase, &res, "GetDescription");
+	fbase->CheckMethods(fbase, &res, "GetVersion");
+	fbase->CheckMethods(fbase, &res, "GetDate");
+	fbase->CheckMethods(fbase, &res, "CreateInstance");
+
+	/* Abort if one method was missing */
+	if (res != 0) return res;
+
+	fbase->RegisterSquirrel();
+	fbase->script_name = strdup(((FSquirrel *)Squirrel::GetGlobalPointer(vm))->current_script);
+
+	return 0;
+}
+
+extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb);
+extern bool FiosIsHiddenFile(const struct dirent *ent);
+
+
+void FSquirrel::ScanDir(const char *dirname)
+{
+	struct stat sb;
+	struct dirent *dirent;
+	DIR *dir;
+	char d_name[256];
+	char script_name[256];
+	dir = ttd_opendir(dirname);
+	/* Dir not found, so do nothing */
+	if (dir == NULL) return;
+
+	/* Walk all dirs trying to find a dir in which 'main.nut' exists */
+	while ((dirent = readdir(dir)) != NULL) {
+		ttd_strlcpy(d_name, FS2OTTD(dirent->d_name), sizeof(d_name));
+
+		/* Found file must be directory, but not '.' or '..' */
+		if (FiosIsValidFile("ai", dirent, &sb) && (sb.st_mode & S_IFDIR) &&
+				(!FiosIsHiddenFile(dirent) || strncasecmp(d_name, PERSONAL_DIR, strlen(d_name)) == 0) &&
+				strcmp(d_name, ".") != 0 && strcmp(d_name, "..") != 0) {
+			/* Create the full-length script-name */
+			strcpy(script_name, dirname);
+			strcat(script_name, PATHSEP);
+			strcat(script_name, d_name);
+			strcat(script_name, PATHSEP);
+			strcat(script_name, "main.nut");
+			/* If it exists, load it up */
+			if (FileExists(script_name)) {
+				DEBUG(ai, 6, "[squirrel] Loading script '%s' for AI handling", script_name);
+				this->current_script = script_name;
+				this->engine->LoadScript(this->current_script);
+			}
+		}
+	}
+	closedir(dir);
+}
+
+void FSquirrel::Initializer()
+{
+	this->engine = new Squirrel();
+
+	/* Create the AIFactory class, and bind the constructor */
+	this->engine->AddClassBegin("AIFactory");
+	this->engine->AddMethod("constructor", &FSquirrel::FactoryConstructor, 1, "x");
+	this->engine->AddClassEnd();
+
+	/* Set a dummy AIController, so script can load */
+	this->engine->AddClassBegin("AIController");
+	this->engine->AddClassEnd();
+	/* Mark this class as global pointer */
+	this->engine->SetGlobalPointer(this);
+
+	/* Scan the AI dir for scripts */
+	this->ScanDir("ai");
+}
+
+FSquirrel::~FSquirrel()
+{
+	delete this->engine;
+}
+
+AIController *AIFactorySquirrel::CreateInstance()
+{
+	const char *class_name = this->engine->CallStringMethod(this->SQ_instance, "CreateInstance");
+	AIControllerSquirrel *controller = new AIControllerSquirrel(this->script_name, class_name);
+
+	return controller;
+}
+
+void AIControllerSquirrel::RegisterClasses()
+{
+	/* Ignore AIFactory if we are really starting an AI */
+	this->engine->AddClassBegin("AIFactory");
+	this->engine->AddClassEnd();
+
+	/* Register all classes */
+	SQAIBaseRegister(this->engine);
+	SQAICargoRegister(this->engine);
+	SQAICompanyRegister(this->engine);
+	SQAIControllerRegister(this->engine);
+	SQAIIndustryRegister(this->engine);
+	SQAIMapRegister(this->engine);
+	SQAITownRegister(this->engine);
+
+	this->engine->SetGlobalPointer(this->engine);
+}
+
+AIControllerSquirrel::AIControllerSquirrel(const char *script, const char *class_name)
+{
+	this->engine = new Squirrel();
+	this->RegisterClasses();
+	this->engine->LoadScript(script);
+	/* Create the main-class */
+	this->engine->CreateClassInstance(class_name, this, &this->SQ_instance);
+	this->engine->CallMethod(this->SQ_instance, "constructor");
+}
+
+AIControllerSquirrel::~AIControllerSquirrel()
+{
+	delete this->engine;
+}
+
+/* virtual */ void AIControllerSquirrel::GameLoop()
+{
+	this->engine->CallMethod(this->SQ_instance, "GameLoop");
+}