package com.hypixel.hytale.protocol;
import com.hypixel.hytale.protocol.io.PacketIO;
import com.hypixel.hytale.protocol.io.ProtocolException;
import com.hypixel.hytale.protocol.io.ValidationResult;
import com.hypixel.hytale.protocol.io.VarInt;
import io.netty.buffer.ByteBuf;
import java.util.Arrays;
import java.util.Objects;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
public class BlockSet {
public static final int NULLABLE_BIT_FIELD_SIZE = 1;
public static final int FIXED_BLOCK_SIZE = 1;
public static final int VARIABLE_FIELD_COUNT = 2;
public static final int VARIABLE_BLOCK_START = 9;
public static final int MAX_SIZE = 32768019;
@Nullable
public String name;
@Nullable
public int[] blocks;
public BlockSet() {
}
public BlockSet(@Nullable String name, @Nullable int[] blocks) {
this.name = name;
this.blocks = blocks;
}
public BlockSet(@Nonnull BlockSet other) {
this.name = other.name;
this.blocks = other.blocks;
}
@Nonnull
public static BlockSet deserialize(@Nonnull ByteBuf buf, int offset) {
BlockSet obj = new BlockSet();
byte nullBits = buf.getByte(offset);
if ((nullBits & 1) != 0) {
int varPos0 = offset + 9 + buf.getIntLE(offset + 1);
int nameLen = VarInt.peek(buf, varPos0);
if (nameLen < 0) {
throw ProtocolException.negativeLength("Name", nameLen);
}
if (nameLen > 4096000) {
throw ProtocolException.stringTooLong("Name", nameLen, 4096000);
}
obj.name = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
}
if ((nullBits & 2) != 0) {
int varPos1 = offset + 9 + buf.getIntLE(offset + 5);
int blocksCount = VarInt.peek(buf, varPos1);
if (blocksCount < 0) {
throw ProtocolException.negativeLength("Blocks", blocksCount);
}
if (blocksCount > 4096000) {
throw ProtocolException.arrayTooLong("Blocks", blocksCount, 4096000);
}
int varIntLen = VarInt.length(buf, varPos1);
if ((long)(varPos1 + varIntLen) + (long)blocksCount * 4L > (long)buf.readableBytes()) {
throw ProtocolException.bufferTooSmall("Blocks", varPos1 + varIntLen + blocksCount * 4, buf.readableBytes());
}
obj.blocks = new int[blocksCount];
for(int i = 0; i < blocksCount; ++i) {
obj.blocks[i] = buf.getIntLE(varPos1 + varIntLen + i * 4);
}
}
return obj;
}
public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
byte nullBits = buf.getByte(offset);
int maxEnd = 9;
if ((nullBits & 1) != 0) {
int fieldOffset0 = buf.getIntLE(offset + 1);
int pos0 = offset + 9 + fieldOffset0;
int sl = VarInt.peek(buf, pos0);
pos0 += VarInt.length(buf, pos0) + sl;
if (pos0 - offset > maxEnd) {
maxEnd = pos0 - offset;
}
}
if ((nullBits & 2) != 0) {
int fieldOffset1 = buf.getIntLE(offset + 5);
int pos1 = offset + 9 + fieldOffset1;
int arrLen = VarInt.peek(buf, pos1);
pos1 += VarInt.length(buf, pos1) + arrLen * 4;
if (pos1 - offset > maxEnd) {
maxEnd = pos1 - offset;
}
}
return maxEnd;
}
public void serialize(@Nonnull ByteBuf buf) {
int startPos = buf.writerIndex();
byte nullBits = 0;
if (this.name != null) {
nullBits = (byte)(nullBits | 1);
}
if (this.blocks != null) {
nullBits = (byte)(nullBits | 2);
}
buf.writeByte(nullBits);
int nameOffsetSlot = buf.writerIndex();
buf.writeIntLE(0);
int blocksOffsetSlot = buf.writerIndex();
buf.writeIntLE(0);
int varBlockStart = buf.writerIndex();
if (this.name != null) {
buf.setIntLE(nameOffsetSlot, buf.writerIndex() - varBlockStart);
PacketIO.writeVarString(buf, this.name, 4096000);
} else {
buf.setIntLE(nameOffsetSlot, -1);
}
if (this.blocks != null) {
buf.setIntLE(blocksOffsetSlot, buf.writerIndex() - varBlockStart);
if (this.blocks.length > 4096000) {
throw ProtocolException.arrayTooLong("Blocks", this.blocks.length, 4096000);
}
VarInt.write(buf, this.blocks.length);
for(int item : this.blocks) {
buf.writeIntLE(item);
}
} else {
buf.setIntLE(blocksOffsetSlot, -1);
}
}
public int computeSize() {
int size = 9;
if (this.name != null) {
size += PacketIO.stringSize(this.name);
}
if (this.blocks != null) {
size += VarInt.size(this.blocks.length) + this.blocks.length * 4;
}
return size;
}
public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
if (buffer.readableBytes() - offset < 9) {
return ValidationResult.error("Buffer too small: expected at least 9 bytes");
} else {
byte nullBits = buffer.getByte(offset);
if ((nullBits & 1) != 0) {
int nameOffset = buffer.getIntLE(offset + 1);
if (nameOffset < 0) {
return ValidationResult.error("Invalid offset for Name");
}
int pos = offset + 9 + nameOffset;
if (pos >= buffer.writerIndex()) {
return ValidationResult.error("Offset out of bounds for Name");
}
int nameLen = VarInt.peek(buffer, pos);
if (nameLen < 0) {
return ValidationResult.error("Invalid string length for Name");
}
if (nameLen > 4096000) {
return ValidationResult.error("Name exceeds max length 4096000");
}
pos += VarInt.length(buffer, pos);
pos += nameLen;
if (pos > buffer.writerIndex()) {
return ValidationResult.error("Buffer overflow reading Name");
}
}
if ((nullBits & 2) != 0) {
int blocksOffset = buffer.getIntLE(offset + 5);
if (blocksOffset < 0) {
return ValidationResult.error("Invalid offset for Blocks");
}
int pos = offset + 9 + blocksOffset;
if (pos >= buffer.writerIndex()) {
return ValidationResult.error("Offset out of bounds for Blocks");
}
int blocksCount = VarInt.peek(buffer, pos);
if (blocksCount < 0) {
return ValidationResult.error("Invalid array count for Blocks");
}
if (blocksCount > 4096000) {
return ValidationResult.error("Blocks exceeds max length 4096000");
}
pos += VarInt.length(buffer, pos);
pos += blocksCount * 4;
if (pos > buffer.writerIndex()) {
return ValidationResult.error("Buffer overflow reading Blocks");
}
}
return ValidationResult.OK;
}
}
public BlockSet clone() {
BlockSet copy = new BlockSet();
copy.name = this.name;
copy.blocks = this.blocks != null ? Arrays.copyOf(this.blocks, this.blocks.length) : null;
return copy;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (!(obj instanceof BlockSet)) {
return false;
} else {
BlockSet other = (BlockSet)obj;
return Objects.equals(this.name, other.name) && Arrays.equals(this.blocks, other.blocks);
}
}
public int hashCode() {
int result = 1;
result = 31 * result + Objects.hashCode(this.name);
result = 31 * result + Arrays.hashCode(this.blocks);
return result;
}
}