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engines/ags/engine/ac/dynobj/cc_dynamic_array.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/engine/ac/dynobj/cc_dynamic_array.h"
+#include "ags/engine/ac/dynobj/dynobj_manager.h"
+#include "ags/engine/ac/dynobj/script_string.h"
+#include "ags/globals.h"
+
+namespace AGS3 {
+
+using namespace AGS::Shared;
+
+const char *CCDynamicArray::TypeName = "CCDynamicArray";
+
+// return the type name of the object
+const char *CCDynamicArray::GetType() {
+	return TypeName;
+}
+
+int CCDynamicArray::Dispose(void *address, bool force) {
+	// If it's an array of managed objects, release their ref counts;
+	// except if this array is forcefully removed from the managed pool,
+	// in which case just ignore these.
+	if (!force) {
+		const Header &hdr = GetHeader(address);
+		bool is_managed = (hdr.ElemCount & ARRAY_MANAGED_TYPE_FLAG) != 0;
+		const uint32_t el_count = hdr.ElemCount & (~ARRAY_MANAGED_TYPE_FLAG);
+
+		if (is_managed) { // Dynamic array of managed pointers: subref them directly
+			const uint32_t *handles = reinterpret_cast<const uint32_t *>(address);
+			for (uint32_t i = 0; i < el_count; ++i) {
+				if (handles[i] > 0)
+					ccReleaseObjectReference(handles[i]);
+			}
+		}
+	}
+
+	delete[] (static_cast<uint8_t *>(address) - MemHeaderSz);
+	return 1;
+}
+
+size_t CCDynamicArray::CalcSerializeSize(const void *address) {
+	const Header &hdr = GetHeader(address);
+	return hdr.TotalSize + FileHeaderSz;
+}
+
+void CCDynamicArray::Serialize(const void *address, Stream *out) {
+	const Header &hdr = GetHeader(address);
+	out->WriteInt32(hdr.ElemCount);
+	out->WriteInt32(hdr.TotalSize);
+	out->Write(address, hdr.TotalSize); // elements
+}
+
+void CCDynamicArray::Unserialize(int index, Stream *in, size_t data_sz) {
+	uint8_t *new_arr = new uint8_t[(data_sz - FileHeaderSz) + MemHeaderSz];
+	Header &hdr = reinterpret_cast<Header &>(*new_arr);
+	hdr.ElemCount = in->ReadInt32();
+	hdr.TotalSize = in->ReadInt32();
+	in->Read(new_arr + MemHeaderSz, data_sz - FileHeaderSz);
+	ccRegisterUnserializedObject(index, &new_arr[MemHeaderSz], this);
+}
+
+/* static */ DynObjectRef CCDynamicArray::Create(int numElements, int elementSize, bool isManagedType) {
+	uint8_t *new_arr = new uint8_t[numElements * elementSize + MemHeaderSz];
+	memset(new_arr, 0, numElements * elementSize + MemHeaderSz);
+	Header &hdr = reinterpret_cast<Header &>(*new_arr);
+	hdr.ElemCount = numElements | (ARRAY_MANAGED_TYPE_FLAG * isManagedType);
+	hdr.TotalSize = elementSize * numElements;
+	void *obj_ptr = &new_arr[MemHeaderSz];
+	int32_t handle = ccRegisterManagedObject(obj_ptr, &_GP(globalDynamicArray));
+	if (handle == 0) {
+		delete[] new_arr;
+		return DynObjectRef();
+	}
+	return DynObjectRef(handle, obj_ptr, &_GP(globalDynamicArray));
+}
+
+DynObjectRef DynamicArrayHelpers::CreateStringArray(const std::vector<const char *> items) {
+	// NOTE: we need element size of "handle" for array of managed pointers
+	DynObjectRef arr = _GP(globalDynamicArray).Create(items.size(), sizeof(int32_t), true);
+	if (!arr.Obj)
+		return arr;
+	// Create script strings and put handles into array
+	int32_t *slots = static_cast<int32_t *>(arr.Obj);
+	for (auto s : items) {
+		DynObjectRef str = ScriptString::Create(s);
+		// We must add reference count, because the string is going to be saved
+		// within another object (array), not returned to script directly
+		ccAddObjectReference(str.Handle);
+		*(slots++) = str.Handle;
+	}
+
+	return arr;
+}
+
+} // namespace AGS3