105 lines
3.1 KiB
Rust
105 lines
3.1 KiB
Rust
// Copyright 2016 Matthew Collins
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use crate::nbt;
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use crate::protocol::{self, Serializable};
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use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
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use std::io;
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#[derive(Debug)]
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pub struct Stack {
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id: isize,
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count: isize,
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damage: Option<isize>,
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tag: Option<nbt::NamedTag>,
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}
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impl Default for Stack {
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fn default() -> Stack {
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Stack {
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id: -1,
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count: 0,
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damage: None,
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tag: None,
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}
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}
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}
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impl Serializable for Option<Stack> {
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fn read_from<R: io::Read>(buf: &mut R) -> Result<Option<Stack>, protocol::Error> {
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let protocol_version = protocol::current_protocol_version();
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if protocol_version >= 404 {
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let present = buf.read_u8()? != 0;
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if !present {
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return Ok(None);
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}
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}
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let id = if protocol_version >= 404 {
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protocol::VarInt::read_from(buf)?.0 as isize
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} else {
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buf.read_i16::<BigEndian>()? as isize
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};
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if id == -1 {
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return Ok(None);
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}
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let count = buf.read_u8()? as isize;
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let damage = if protocol_version >= 404 {
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// 1.13.2+ stores damage in the NBT
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None
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} else {
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Some(buf.read_i16::<BigEndian>()? as isize)
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};
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let tag: Option<nbt::NamedTag> = if protocol_version >= 47 {
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Serializable::read_from(buf)?
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} else {
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// 1.7 uses a different slot data format described on https://wiki.vg/index.php?title=Slot_Data&diff=6056&oldid=4753
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let tag_size = buf.read_i16::<BigEndian>()?;
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if tag_size != -1 {
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for _ in 0..tag_size {
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let _ = buf.read_u8()?;
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}
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// TODO: decompress zlib NBT for 1.7
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None
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} else {
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None
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}
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};
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Ok(Some(Stack {
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id: id as isize,
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count,
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damage,
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tag,
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}))
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), protocol::Error> {
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match *self {
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Some(ref val) => {
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// TODO: if protocol_version >= 404, send present and id varint, no damage, for 1.13.2
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buf.write_i16::<BigEndian>(val.id as i16)?;
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buf.write_u8(val.count as u8)?;
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buf.write_i16::<BigEndian>(val.damage.unwrap_or(0) as i16)?;
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// TODO: compress zlib NBT if 1.7
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val.tag.write_to(buf)?;
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}
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None => buf.write_i16::<BigEndian>(-1)?,
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}
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Result::Ok(())
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}
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}
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