C# IArea.ReadInt4方法代码示例

        public void Open(long offset)
        {
            lock (this) {
                headerArea = Store.GetArea(offset);
                int magicValue = headerArea.ReadInt4();
                if (magicValue != Magic)
                    throw new IOException("Magic value for state header area is incorrect.");

                if (headerArea.ReadInt4() != 0)
                    throw new IOException("Unknown version for state header area.");

                currentTableId = (int)headerArea.ReadInt8();
                visAreaPointer = headerArea.ReadInt8();
                delAreaPointer = headerArea.ReadInt8();

                // Setup the visible and delete list
                visibleList = new List<TableState>();
                deleteList = new List<TableState>();

                // Read the resource list for the visible and delete list.
                ReadStateResourceList(visibleList, visAreaPointer);
                ReadStateResourceList(deleteList, delAreaPointer);
            }
        }

        public void Open(long startPointer)
        {
            lock (this) {
                // Set up the start area
                startArea = Store.GetArea(startPointer);

                int magic = startArea.ReadInt4();
                if (magic != Magic)
                    throw new IOException("Magic value for index set does not match.");

                int version = startArea.ReadInt4();
                if (version != 1)
                    throw new IOException("Unknown version for index set.");

                // Setup the index_header area
                indexHeaderPointer = startArea.ReadInt8();
                indexHeaderArea = Store.GetArea(indexHeaderPointer);

                // Read the index header area
                version = indexHeaderArea.ReadInt4(); // version
                if (version != 1)
                    throw new IOException("Incorrect version");

                indexHeaderArea.ReadInt4(); // reserved
                int indexCount = (int)indexHeaderArea.ReadInt8();
                indexBlocks = new IndexBlock[indexCount];

                // Initialize each index block
                for (int i = 0; i < indexCount; ++i) {
                    int type = indexHeaderArea.ReadInt4();
                    int blockSize = indexHeaderArea.ReadInt4();
                    long indexBlockPointer = indexHeaderArea.ReadInt8();
                    if (type != 1)
                        throw new IOException("Do not understand index type: " + type);

                    indexBlocks[i] = new IndexBlock(this, i, blockSize, indexBlockPointer);
                    indexBlocks[i].AddReference();
                }
            }
        }

        public void Open(long listPointer)
        {
            headerAreaId = listPointer;
            headerArea = store.GetArea(headerAreaId);

            int magic = headerArea.ReadInt4(); // MAGIC
            if (magic != Magic)
                throw new IOException("Incorrect magic for list block. [magic=" + magic + "]");

            BlockCount = headerArea.ReadInt4();
            headerArea.ReadInt8(); // Delete Chain Head
            for (int i = 0; i < BlockCount; ++i) {
                long blockPointer = headerArea.ReadInt8();
                blockElements[i] = blockPointer;
                blockAreas[i] = store.GetArea(blockPointer);
            }
        }