374 lines
11 KiB
Rust
374 lines
11 KiB
Rust
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use std::collections::HashMap;
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use std::cell::UnsafeCell;
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pub trait BlockSet {
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fn plugin(&self) -> &'static str {
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"minecraft"
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}
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fn name(&self) -> &'static str;
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fn blocks(&'static self) -> Vec<&'static Block>;
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fn base(&'static self) -> &'static Block {
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self.blocks()[0]
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}
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}
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pub trait Block: Sync + ::std::fmt::Debug {
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fn steven_id(&'static self) -> usize;
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fn vanilla_id(&'static self) -> Option<usize>;
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fn set_steven_id(&'static self, id: usize);
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fn set_vanilla_id(&'static self, id: usize);
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fn plugin(&self) -> &'static str;
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fn name(&self) -> &'static str;
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fn equals(&'static self, other: &'static Block) -> bool {
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self.steven_id() == other.steven_id()
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}
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fn in_set(&'static self, set: &'static BlockSet) -> bool {
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// TODO: Make faster
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for block in set.blocks() {
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if self.equals(block) {
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return true
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}
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}
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false
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}
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fn renderable(&'static self) -> bool {
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true
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}
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fn data(&'static self) -> Option<u8> {
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Some(0)
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}
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}
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pub struct BlockManager {
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vanilla_id: Vec<Option<&'static Block>>,
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steven_id: Vec<&'static Block>,
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next_id: usize,
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}
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macro_rules! define_blocks {
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(
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$(
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$internal_name:ident $ty:ty = $bl:expr;
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)*
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) => (
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lazy_static! {
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$(
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pub static ref $internal_name: $ty = $bl;
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)*
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static ref MANAGER: BlockManager = {
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let mut manager = BlockManager {
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vanilla_id: vec![None; 0xFFFF],
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steven_id: vec![],
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next_id: 0,
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};
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$(
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manager.register_set(&*$internal_name);
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)*
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manager
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};
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}
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)
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}
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// TODO: Replace this with trait fields when supported by rust
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macro_rules! block_impl {
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() => (
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fn steven_id(&'static self) -> usize {
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unsafe { *self.steven_id_storage.get() }
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}
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fn vanilla_id(&'static self) -> Option<usize> {
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unsafe { *self.vanilla_id_storage.get() }
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}
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fn set_steven_id(&'static self, id: usize) {
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unsafe { *self.steven_id_storage.get() = id; }
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}
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fn set_vanilla_id(&'static self, id: usize) {
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unsafe { *self.vanilla_id_storage.get() = Some(id); }
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}
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fn plugin(&self) -> &'static str {
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self.plugin
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}
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fn name(&self) -> &'static str {
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self.name
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}
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)
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}
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macro_rules! block_combos {
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(
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$set:ty, params($($pname:ident : $pty:ty),*),
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$bty:ident {
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$(
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$fname:ident : $fval:expr,
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)*
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}
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) => (
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struct $bty {
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steven_id_storage: UnsafeCell<usize>,
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vanilla_id_storage: UnsafeCell<Option<usize>>,
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plugin: &'static str,
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name: &'static str,
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$(
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$fname: $fty,
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)*
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}
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unsafe impl Sync for $bty {}
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impl ::std::fmt::Debug for $bty {
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fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
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write!(f, "{}:{}", self.plugin(), self.name())
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}
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}
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impl $set {
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fn gen_combos(&mut self, $($pname: $pty),*) {
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let val = $bty {
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steven_id_storage: UnsafeCell::new(0),
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vanilla_id_storage: UnsafeCell::new(None),
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name: self.name(),
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plugin: self.plugin(),
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$(
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$fname: $fval,
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)*
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};
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self.sub_blocks.push(val);
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}
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}
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);
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(
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$set:ty, params($($pname:ident : $pty:ty),*),
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types (
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$(
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$tname:ident : $tty:ty = [$($val:expr),+]
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),+
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),
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$bty:ident {
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$(
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$fname:ident : $fty:ty = $fval:expr,
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)*
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}
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) => (
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struct $bty {
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steven_id_storage: UnsafeCell<usize>,
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vanilla_id_storage: UnsafeCell<Option<usize>>,
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plugin: &'static str,
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name: &'static str,
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$(
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$fname: $fty,
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)*
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}
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unsafe impl Sync for $bty {}
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impl ::std::fmt::Debug for $bty {
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fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
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try!(write!(f, "{}:{}[", self.plugin(), self.name()));
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let mut s = String::new();
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$(
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s.push_str(&format!("{}={},", stringify!($tname), self.$tname));
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)+
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s.pop();
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write!(f, "{}]", s)
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}
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}
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impl $set {
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fn gen_combos(&mut self, $($pname: $pty),*) {
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use std::iter::Iterator;
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#[allow(dead_code)]
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#[allow(non_camel_case_types)]
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struct CombinationIter<$($tname),+> {
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$(
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$tname: $tname,
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)+
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orig: CombinationIterOrig<$($tname),+> ,
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last: Option<Wrapper>,
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done: bool,
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}
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#[allow(non_camel_case_types)]
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struct CombinationIterOrig<$($tname),+> {
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$(
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$tname: $tname,
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)+
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}
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#[derive(Clone)]
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struct Wrapper {
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$(
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$tname: $tty,
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)+
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}
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#[allow(non_camel_case_types)]
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impl <$($tname: Iterator<Item=$tty> + Clone),+> CombinationIter<$($tname),+> {
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fn new($($tname: $tname),+) -> CombinationIter<$($tname),+> {
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let orig = CombinationIterOrig {
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$(
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$tname: $tname
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),+
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};
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CombinationIter {
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$(
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$tname: orig.$tname.clone(),
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)+
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orig: orig,
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last: None,
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done: false,
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}
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}
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}
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#[allow(non_camel_case_types)]
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impl <$($tname: Iterator<Item=$tty> + Clone),+> Iterator for CombinationIter<$($tname),+> {
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type Item = Wrapper;
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fn next(&mut self) -> Option<Self::Item> {
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if self.done {
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return None
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}
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if self.last.is_none() {
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let wrapper = Wrapper {
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$(
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$tname: self.$tname.next().unwrap() // Shouldn't ever fail the first iter
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),+
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};
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self.last = Some(wrapper.clone());
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return Some(wrapper);
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}
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let mut ret = self.last.take().unwrap();
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$(
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if let Some(val) = self.$tname.next() {
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ret.$tname = val;
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self.last = Some(ret.clone());
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return Some(ret)
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}
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self.$tname = self.orig.$tname.clone();
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)+
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self.done = true;
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None
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}
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}
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let iter = CombinationIter::new($(vec![$($val),+].into_iter()),+);
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for val in iter {
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$(
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let $tname = val.$tname;
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)+
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let val = $bty {
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steven_id_storage: UnsafeCell::new(0),
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vanilla_id_storage: UnsafeCell::new(None),
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name: self.name(),
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plugin: self.plugin(),
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$(
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$fname: $fval,
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)*
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};
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self.sub_blocks.push(val);
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}
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}
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}
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)
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}
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#[test]
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fn temp_test() {
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force_init();
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println!("{:?}", STONE.blocks());
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unimplemented!()
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}
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impl BlockManager {
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fn force_init(&self) {}
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fn register_set(&mut self, set: &'static BlockSet) {
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for block in set.blocks() {
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if let Some(data) = block.data() {
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let id = (self.next_id<<4) | (data as usize);
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self.vanilla_id[id] = Some(block);
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block.set_vanilla_id(id);
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}
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block.set_steven_id(self.steven_id.len());
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self.steven_id.push(block);
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}
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self.next_id += 1;
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}
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fn get_block_by_steven_id(&self, id: usize) -> &'static Block {
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self.steven_id[id]
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}
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fn get_block_by_vanilla_id(&self, id: usize) -> &'static Block {
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self.vanilla_id.get(id).and_then(|v| *v).unwrap_or(MISSING.base())
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}
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}
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pub fn force_init() {
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MANAGER.force_init();
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}
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pub fn get_block_by_steven_id(id: usize) -> &'static Block {
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MANAGER.get_block_by_steven_id(id)
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}
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pub fn get_block_by_vanilla_id(id: usize) -> &'static Block {
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MANAGER.get_block_by_vanilla_id(id)
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}
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pub mod simple;
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pub mod stone;
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define_blocks! {
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AIR InvisibleBlockSet = InvisibleBlockSet::new("air");
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STONE stone::StoneBlockSet = stone::StoneBlockSet::new("stone");
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GRASS simple::SimpleBlockSet = simple::SimpleBlockSet::new("grass");
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DIRT simple::SimpleBlockSet = simple::SimpleBlockSet::new("dirt");
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MISSING simple::SimpleBlockSet = simple::SimpleBlockSet::new("missing");
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}
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/// A block set that contains blocks which cannot be rendered.
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pub struct InvisibleBlockSet {
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name: &'static str,
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sub_blocks: Vec<InvisibleBlock>,
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}
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block_combos!(InvisibleBlockSet, params(),
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InvisibleBlock {
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}
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);
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impl InvisibleBlockSet {
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fn new(name: &'static str) -> InvisibleBlockSet {
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let mut set = InvisibleBlockSet {
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name: name,
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sub_blocks: vec![],
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};
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set.gen_combos();
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set
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}
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}
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impl BlockSet for InvisibleBlockSet {
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fn name(&self) -> &'static str {
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self.name
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}
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fn blocks(&'static self) -> Vec<&'static Block> {
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self.sub_blocks.iter().map(|v| v as &Block).collect()
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}
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}
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impl Block for InvisibleBlock {
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block_impl!();
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fn renderable(&'static self) -> bool {
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false
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}
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}
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