first commit

Minecraft.World/ZoneFile.cpp

@@ -0,0 +1,92 @@
+#include "stdafx.h"
+#include "ByteBuffer.h"
+#include "File.h"
+#include "ZoneFile.h"
+
+
+const int ZoneFile::slotsLength = ZonedChunkStorage::CHUNKS_PER_ZONE * ZonedChunkStorage::CHUNKS_PER_ZONE;
+
+ZoneFile::ZoneFile(__int64 key, File file, File entityFile) : slots(slotsLength)
+{
+	lastUse = 0;
+
+	this->key = key;
+	this->file = file;
+
+	// 4J - try/catch removed
+//    try {
+    this->entityFile = new NbtSlotFile(entityFile);
+//    } catch (Exception e) {
+//        System.out.println("Broken entity file: " + entityFile + " (" + e.toString() + "), replacing..");
+//        entityFile.delete();
+//        entityFile.createNewFile();
+//        this.entityFile = new NbtSlotFile(entityFile);
+//    }
+
+    channel = CreateFile(wstringtofilename(file.getPath()), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+	// 4J - try/catch removed
+//    try {
+        readHeader();
+//    } catch (Exception e) {
+//        e.printStackTrace();
+//        throw new IOException("Broken zone file: " + file + ": " + e);
+//    }
+}
+
+ZoneFile::~ZoneFile()
+{
+	delete [] slots.data;
+}
+
+void ZoneFile::readHeader()
+{
+    ZoneIo *zoneIo = new ZoneIo(channel, 0);
+    ByteBuffer *bb = zoneIo->read(FILE_HEADER_SIZE);
+    bb->flip();
+    if (bb->remaining() < 5) return;
+    int magic = bb->getInt();
+//    if (magic != MAGIC_NUMBER) throw new IOException("Bad magic number: " + magic);		// 4J - TODO
+    short version = bb->getShort();
+//    if (version != 0) throw new IOException("Bad version number: " + version);	// 4J - TODO
+
+    slotCount = bb->getShort();
+    bb->getShortArray(slots);
+    bb->position(bb->position() + slotsLength * 2);
+}
+
+void ZoneFile::writeHeader()
+{
+    ZoneIo *zoneIo = new ZoneIo(channel, 0);
+
+    ByteBuffer *bb = ByteBuffer::allocate(FILE_HEADER_SIZE);
+    bb->order(ZonedChunkStorage::BYTEORDER);
+    bb->putInt(MAGIC_NUMBER);
+    bb->putShort((short) 0);
+    bb->putShort((short) slotCount);
+    bb->putShortArray(slots);
+    bb->position(bb->position() + slots.length * 2);
+    bb->flip();
+    zoneIo->write(bb, FILE_HEADER_SIZE);
+}
+
+void ZoneFile::close()
+{
+	CloseHandle(channel);
+    entityFile->close();
+}
+
+ZoneIo *ZoneFile::getZoneIo(int slot)
+{
+    if (slots[slot] == 0)
+	{
+        slots[slot] = ++slotCount;
+        writeHeader();
+    }
+    int byteOffs = (slots[slot] - 1) * ZonedChunkStorage::CHUNK_SIZE_BYTES + FILE_HEADER_SIZE;
+    return new ZoneIo(channel, byteOffs);
+}
+
+bool ZoneFile::containsSlot(int slot)
+{
+	return slots[slot] > 0;
+}