Initial commit

engines/ags/engine/script/runtime_script_value.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "ags/shared/script/cc_common.h"
+#include "ags/engine/script/runtime_script_value.h"
+#include "ags/engine/ac/dynobj/cc_script_object.h"
+#include "ags/shared/util/memory.h"
+
+namespace AGS3 {
+
+using namespace AGS::Shared;
+
+//
+// NOTE to future optimizers: I am using 'this' ptr here to better
+// distinguish Runtime Values.
+//
+
+uint8_t RuntimeScriptValue::ReadByte() const {
+	switch (this->Type) {
+	case kScValStackPtr:
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			return *(uint8_t *)(GetRValuePtrWithOffset());
+		} else {
+			return static_cast<uint8_t>(RValue->IValue);
+		}
+	case kScValStaticArray:
+	case kScValScriptObject:
+		return this->ObjMgr->ReadInt8(this->Ptr, this->IValue);
+	default:
+		return *((uint8_t *)this->GetPtrWithOffset());
+	}
+}
+
+int16_t RuntimeScriptValue::ReadInt16() const {
+	switch (this->Type) {
+	case kScValStackPtr:
+		if (RValue->Type == kScValData) {
+			return *(int16_t *)(GetRValuePtrWithOffset());
+		} else {
+			return static_cast<int16_t>(RValue->IValue);
+		}
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			return Memory::ReadInt16LE(GetRValuePtrWithOffset());
+		} else {
+			return static_cast<int16_t>(RValue->IValue);
+		}
+	case kScValStaticArray:
+	case kScValScriptObject:
+		return this->ObjMgr->ReadInt16(this->Ptr, this->IValue);
+
+	default:
+		return *((int16_t *)this->GetPtrWithOffset());
+	}
+}
+
+int32_t RuntimeScriptValue::ReadInt32() const {
+	switch (this->Type) {
+	case kScValStackPtr:
+		if (RValue->Type == kScValData) {
+			return *(int32_t *)(GetRValuePtrWithOffset());
+		} else {
+			return static_cast<int32_t>(RValue->IValue);
+		}
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			return Memory::ReadInt32LE(GetRValuePtrWithOffset());
+		} else {
+			return static_cast<uint32_t>(RValue->IValue);
+		}
+	case kScValStaticArray:
+	case kScValScriptObject:
+		return this->ObjMgr->ReadInt32(this->Ptr, this->IValue);
+	default:
+		return *((int32_t *)this->GetPtrWithOffset());
+	}
+}
+
+void RuntimeScriptValue::WriteByte(uint8_t val) {
+	switch (this->Type) {
+	case kScValStackPtr:
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			*(uint8_t *)(GetRValuePtrWithOffset()) = val;
+		} else {
+			RValue->SetUInt8(val); // set RValue as int
+		}
+		break;
+	case kScValStaticArray:
+	case kScValScriptObject:
+		this->ObjMgr->WriteInt8(this->Ptr, this->IValue, val);
+		break;
+	default:
+		*((uint8_t *)this->GetPtrWithOffset()) = val;
+		break;
+	}
+}
+
+void RuntimeScriptValue::WriteInt16(int16_t val) {
+	switch (this->Type) {
+	case kScValStackPtr:
+		if (RValue->Type == kScValData) {
+			*(int16_t *)(GetRValuePtrWithOffset()) = val;
+		} else {
+			RValue->SetInt16(val); // set RValue as int
+		}
+		break;
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			Memory::WriteInt16LE(GetRValuePtrWithOffset(), val);
+		} else {
+			RValue->SetInt16(val); // set RValue as int
+		}
+		break;
+	case kScValStaticArray:
+	case kScValScriptObject:
+		this->ObjMgr->WriteInt16(this->Ptr, this->IValue, val);
+		break;
+	default:
+		*((int16_t *)this->GetPtrWithOffset()) = val;
+		break;
+	}
+}
+
+void RuntimeScriptValue::WriteInt32(int32_t val) {
+	switch (this->Type) {
+	case kScValStackPtr:
+		if (RValue->Type == kScValData) {
+			*(int32_t *)(GetRValuePtrWithOffset()) = val;
+		} else {
+			RValue->SetInt32(val); // set RValue as int
+		}
+		break;
+	case kScValGlobalVar:
+		if (RValue->Type == kScValData) {
+			Memory::WriteInt32LE(GetRValuePtrWithOffset(), val);
+		} else {
+			RValue->SetInt32(val); // set RValue as int
+		}
+		break;
+	case kScValStaticArray:
+	case kScValScriptObject:
+		this->ObjMgr->WriteInt32(this->Ptr, this->IValue, val);
+		break;
+	default:
+		*((int32_t *)this->GetPtrWithOffset()) = val;
+		break;
+	}
+}
+
+RuntimeScriptValue &RuntimeScriptValue::DirectPtr() {
+	if (Type == kScValGlobalVar || Type == kScValStackPtr) {
+		int ival = IValue;
+		*this = *RValue;
+		IValue += ival;
+	}
+
+	if (Ptr) {
+		if (Type == kScValScriptObject)
+			Ptr = ObjMgr->GetFieldPtr(Ptr, IValue);
+		else
+			Ptr = PtrU8 + IValue;
+		IValue = 0;
+	}
+	return *this;
+}
+
+RuntimeScriptValue &RuntimeScriptValue::DirectPtrObj() {
+	if (Type == kScValGlobalVar || Type == kScValStackPtr)
+		*this = *RValue;
+	return *this;
+}
+
+void *RuntimeScriptValue::GetDirectPtr() const {
+	const RuntimeScriptValue *temp_val = this;
+	int ival = temp_val->IValue;
+	if (temp_val->Type == kScValGlobalVar || temp_val->Type == kScValStackPtr) {
+		temp_val = temp_val->RValue;
+		ival += temp_val->IValue;
+	}
+	if (temp_val->Type == kScValScriptObject)
+		return temp_val->ObjMgr->GetFieldPtr(temp_val->Ptr, ival);
+	else
+		return temp_val->PtrU8 + ival;
+}
+
+} // namespace AGS3