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#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_t 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, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
// 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;
}
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