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Code Issues

(svn r15467) -Fix [NoAI]: AIs with an error in their info.nut are no longer available in-game.

release/0.7
yexo 2009-02-13 17:17:34 +00:00
parent 15b9366f06
commit 8e14d77d05
7 changed files with 108 additions and 30 deletions
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27
src/ai/ai_info.cpp
View File

@ -45,9 +45,9 @@ AILibrary::~AILibrary()
free((void *)this->category);
}
void AIFileInfo::GetSettings() const
bool AIFileInfo::GetSettings()
{
this->engine->CallMethod(*this->SQ_instance, "GetSettings", NULL, -1);
return this->engine->CallMethod(*this->SQ_instance, "GetSettings", NULL, -1);
}
bool AIFileInfo::CheckMethod(const char *name) const
@ -90,13 +90,13 @@ bool AIFileInfo::CheckMethod(const char *name) const
info->main_script = strdup(info->base->GetMainScript());
/* Cache the data the info file gives us. */
info->author = info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAuthor");
info->name = info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetName");
info->short_name = info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetShortName");
info->description = info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDescription");
info->date = info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDate");
info->version = info->engine->CallIntegerMethod(*info->SQ_instance, "GetVersion");
info->instance_name = info->engine->CallStringMethodStrdup(*info->SQ_instance, "CreateInstance");
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAuthor", &info->author)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetName", &info->name)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetShortName", &info->short_name)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDescription", &info->description)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDate", &info->date)) return SQ_ERROR;
if (!info->engine->CallIntegerMethod(*info->SQ_instance, "GetVersion", &info->version)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "CreateInstance", &info->instance_name)) return SQ_ERROR;
return 0;
}
@ -118,10 +118,10 @@ bool AIFileInfo::CheckMethod(const char *name) const
/* Check if we have settings */
if (info->engine->MethodExists(*info->SQ_instance, "GetSettings")) {
info->GetSettings();
if (!info->GetSettings()) return SQ_ERROR;
}
if (info->engine->MethodExists(*info->SQ_instance, "MinVersionToLoad")) {
info->min_loadable_version = info->engine->CallIntegerMethod(*info->SQ_instance, "MinVersionToLoad");
if (!info->engine->CallIntegerMethod(*info->SQ_instance, "MinVersionToLoad", &info->min_loadable_version)) return SQ_ERROR;
} else {
info->min_loadable_version = info->GetVersion();
}
@ -367,7 +367,10 @@ int AIInfo::GetSettingDefaultValue(const char *name) const
}
/* Cache the category */
library->category = library->engine->CallStringMethodStrdup(*library->SQ_instance, "GetCategory");
if (!library->engine->CallStringMethodStrdup(*library->SQ_instance, "GetCategory", &library->category)) {
delete library;
return SQ_ERROR;
}
/* Register the Library to the base system */
library->base->RegisterLibrary(library);

2
src/ai/ai_info.hpp
View File

@ -72,7 +72,7 @@ public:
/**
* Get the settings of the AI.
*/
void GetSettings() const;
bool GetSettings();
/**
* Get the date of the AI.

31
src/ai/ai_instance.cpp
View File

@ -249,6 +249,11 @@ void AIInstance::Died()
void AIInstance::GameLoop()
{
if (this->is_dead) return;
if (this->engine->HasScriptCrashed()) {
/* The script crashed during saving, kill it here. */
this->Died();
return;
}
this->controller->ticks++;
if (this->suspend < -1) this->suspend++; // Multiplayer suspend, increase up to -1.
@ -275,12 +280,12 @@ void AIInstance::GameLoop()
AIObject::SetAllowDoCommand(false);
/* Run the constructor if it exists. Don't allow any DoCommands in it. */
if (this->engine->MethodExists(*this->instance, "constructor")) {
this->engine->CallMethod(*this->instance, "constructor");
if (!this->engine->CallMethod(*this->instance, "constructor")) { this->Died(); return; }
}
this->CallLoad();
if (!this->CallLoad()) { this->Died(); return; }
AIObject::SetAllowDoCommand(true);
/* Start the AI by calling Start() */
if (!this->engine->CallMethod(*this->instance, "Start", _settings_game.ai.ai_max_opcode_till_suspend)) this->Died();
if (!this->engine->CallMethod(*this->instance, "Start", _settings_game.ai.ai_max_opcode_till_suspend) || !this->engine->IsSuspended()) this->Died();
} catch (AI_VMSuspend e) {
this->suspend = e.GetSuspendTime();
this->callback = e.GetSuspendCallback();
@ -500,8 +505,8 @@ enum {
void AIInstance::Save()
{
/* Don't save data if the AI didn't start yet. */
if (this->engine == NULL) {
/* Don't save data if the AI didn't start yet or if it crashed. */
if (this->engine == NULL || this->engine->HasScriptCrashed()) {
SaveEmpty();
return;
}
@ -526,7 +531,12 @@ void AIInstance::Save()
/* We don't want to be interrupted during the save function. */
bool backup_allow = AIObject::GetAllowDoCommand();
AIObject::SetAllowDoCommand(false);
this->engine->CallMethod(*this->instance, "Save", &savedata);
if (!this->engine->CallMethod(*this->instance, "Save", &savedata)) {
/* The script crashed in the Save function. We can't kill
* it here, but do so in the next AI tick. */
SaveEmpty();
return;
}
AIObject::SetAllowDoCommand(backup_allow);
if (!sq_istable(savedata)) {
@ -637,21 +647,21 @@ void AIInstance::Load(int version)
sq_pushbool(vm, true);
}
void AIInstance::CallLoad()
bool AIInstance::CallLoad()
{
HSQUIRRELVM vm = this->engine->GetVM();
/* Is there save data that we should load? */
SQBool res;
sq_getbool(vm, -1, &res);
sq_poptop(vm);
if (!res) return;
if (!res) return true;
if (!this->engine->MethodExists(*this->instance, "Load")) {
AILog::Warning("Loading failed: there was data for the AI to load, but the AI does not have a Load() function.");
/* Pop the savegame data and version. */
sq_pop(vm, 2);
return;
return true;
}
/* Go to the instance-root */
@ -668,8 +678,9 @@ void AIInstance::CallLoad()
/* Call the AI load function. sq_call removes the arguments (but not the
* function pointer) from the stack. */
sq_call(vm, 3, SQFalse, SQFalse);
if (SQ_FAILED(sq_call(vm, 3, SQFalse, SQFalse))) return false;
/* Pop 1) The version, 2) the savegame data, 3) the object instance, 4) the function pointer. */
sq_pop(vm, 4);
return true;
}

2
src/ai/ai_instance.hpp
View File

@ -100,7 +100,7 @@ public:
* Call the AI Load function if it exists and data was loaded
* from a savegame.
*/
void CallLoad();
bool CallLoad();
/**
* Load and discard data from a savegame.

5
src/ai/ai_scanner.cpp
View File

@ -88,6 +88,8 @@ void AIScanner::ScanDir(const char *dirname, bool library_scan, bool library_rec
if (!FioCheckFileExists(info_script, AI_DIR) || !FioCheckFileExists(main_script, AI_DIR)) continue;
DEBUG(ai, 6, "Loading AI at location '%s'", main_script);
/* We don't care if one of the other scripst failed to load. */
this->engine->ResetCrashed();
this->engine->LoadScript(info_script);
} else {
char library_script[MAX_PATH];
@ -100,6 +102,8 @@ void AIScanner::ScanDir(const char *dirname, bool library_scan, bool library_rec
if (!FioCheckFileExists(library_script, AI_LIBRARY_DIR) || !FioCheckFileExists(main_script, AI_LIBRARY_DIR)) continue;
DEBUG(ai, 6, "Loading AI Library at location '%s'", main_script);
/* We don't care if one of the other scripst failed to load. */
this->engine->ResetCrashed();
this->engine->LoadScript(library_script);
}
}
@ -157,6 +161,7 @@ AIScanner::AIScanner() :
this->ScanAIDir();
/* Create the dummy AI */
this->engine->ResetCrashed();
extern void AI_CreateAIInfoDummy(HSQUIRRELVM vm);
AI_CreateAIInfoDummy(this->engine->GetVM());
}

49
src/script/squirrel.cpp
View File

@ -24,7 +24,9 @@ void Squirrel::CompileError(HSQUIRRELVM vm, const SQChar *desc, const SQChar *so
#endif
/* Check if we have a custom print function */
SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
engine->crashed = true;
SQPrintFunc *func = engine->print_func;
if (func == NULL) {
scfprintf(stderr, _SC("%s"), buf);
} else {
@ -59,7 +61,9 @@ void Squirrel::RunError(HSQUIRRELVM vm, const SQChar *error)
/* Check if we have a custom print function */
SQChar buf[1024];
scsnprintf(buf, lengthof(buf), _SC("Your script made an error: %s\n"), error);
SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
engine->crashed = true;
SQPrintFunc *func = engine->print_func;
if (func == NULL) {
scfprintf(stderr, _SC("%s"), buf);
} else {
@ -156,6 +160,7 @@ void Squirrel::AddClassEnd()
bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
{
assert(!this->crashed);
int top = sq_gettop(this->vm);
/* Go to the instance-root */
sq_pushobject(this->vm, instance);
@ -171,6 +176,7 @@ bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
bool Squirrel::Resume(int suspend)
{
assert(!this->crashed);
sq_resumecatch(this->vm, suspend);
return this->vm->_suspended != 0;
}
@ -182,6 +188,7 @@ void Squirrel::CollectGarbage()
bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend)
{
assert(!this->crashed);
/* Store the stack-location for the return value. We need to
* restore this after saving or the stack will be corrupted
* if we're in the middle of a DoCommand. */
@ -199,7 +206,7 @@ bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT
}
/* Call the method */
sq_pushobject(this->vm, instance);
sq_call(this->vm, 1, ret == NULL ? SQFalse : SQTrue, SQTrue, suspend);
if (SQ_FAILED(sq_call(this->vm, 1, ret == NULL ? SQFalse : SQTrue, SQTrue, suspend))) return false;
if (ret != NULL) sq_getstackobj(vm, -1, ret);
/* Reset the top, but don't do so for the AI main function, as we need
* a correct stack when resuming. */
@ -207,7 +214,25 @@ bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT
/* Restore the return-value location. */
this->vm->_suspended_target = last_target;
return this->vm->_suspended != 0;
return true;
}
bool Squirrel::CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend)
{
HSQOBJECT ret;
if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
if (ret._type != OT_STRING) return false;
*res = strdup(ObjectToString(&ret));
return true;
}
bool Squirrel::CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend)
{
HSQOBJECT ret;
if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
if (ret._type != OT_INTEGER) return false;
*res = ObjectToInteger(&ret);
return true;
}
/* static */ bool Squirrel::CreateClassInstanceVM(HSQUIRRELVM vm, const char *class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook)
@ -258,6 +283,7 @@ Squirrel::Squirrel()
this->vm = sq_open(1024);
this->print_func = NULL;
this->global_pointer = NULL;
this->crashed = false;
/* Handle compile-errors ourself, so we can display it nicely */
sq_setcompilererrorhandler(this->vm, &Squirrel::CompileError);
@ -459,3 +485,18 @@ void Squirrel::InsertResult(int result)
{
vm->DecreaseOps(ops);
}
bool Squirrel::IsSuspended()
{
return this->vm->_suspended != 0;
}
bool Squirrel::HasScriptCrashed()
{
return this->crashed;
}
void Squirrel::ResetCrashed()
{
this->crashed = false;
}

22
src/script/squirrel.hpp
View File

@ -12,6 +12,7 @@ private:
HSQUIRRELVM vm; ///< The VirtualMachine instnace for squirrel
void *global_pointer; ///< Can be set by who ever initializes Squirrel
SQPrintFunc *print_func; ///< Points to either NULL, or a custom print handler
bool crashed; ///< True if the squirrel script made an error.
/**
* The internal RunError handler. It looks up the real error and calls RunError with it.
@ -111,11 +112,12 @@ public:
/**
* Call a method of an instance, in various flavors.
* @return False if the script crashed or returned a wrong type.
*/
bool CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend = -1);
bool CallMethod(HSQOBJECT instance, const char *method_name, int suspend = -1) { return this->CallMethod(instance, method_name, NULL, suspend); }
const char *CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, int suspend = -1) { HSQOBJECT ret; this->CallMethod(instance, method_name, &ret, suspend); return strdup(ObjectToString(&ret)); }
int CallIntegerMethod(HSQOBJECT instance, const char *method_name, int suspend = -1) { HSQOBJECT ret; this->CallMethod(instance, method_name, &ret, suspend); return ObjectToInteger(&ret); }
bool CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend = -1);
bool CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend = -1);
/**
* Check if a method exists in an instance.
@ -191,6 +193,22 @@ public:
* Tell the VM to remove \c amount ops from the number of ops till suspend.
*/
static void DecreaseOps(HSQUIRRELVM vm, int amount);
/**
* Did the squirrel code suspend or return normally.
* @return True if the function suspended.
*/
bool IsSuspended();
/**
* Find out if the squirrel script made an error before.
*/
bool HasScriptCrashed();
/**
* Reset the crashed status.
*/
void ResetCrashed();
};
#endif /* SQUIRREL_HPP */