<commit_before>//
//  SOS: the Stupid Operating System
//  by Hawk Weisman (hi@hawkweisman.me)
//
//  Copyright (c) 2015 Hawk Weisman
//  Released under the terms of the MIT license. See `LICENSE` in the root
//  directory of this repository for more information.
//
//! A linked-list implementation using `RawLink`s.
use super::rawlink::RawLink;

use core::marker::PhantomData;
use core::ptr::Unique;
#[cfg(test)] mod test;

pub unsafe trait OwnedRef<T> {
    unsafe fn from_raw(ptr: *mut T) -> Self;
    unsafe fn take(self);
    fn get(&self) -> &T;
    fn get_mut(&mut self) -> &mut T;
}

pub trait Node: Sized {
    fn next(&self) -> &RawLink<Self>;
    fn prev(&self) -> &RawLink<Self>;

    fn next_mut(&mut self) -> &mut RawLink<Self>;
    fn prev_mut(&mut self) -> &mut RawLink<Self>;
}

pub struct List<T, N>
where T: OwnedRef<N>
    , N: Node {
    head: RawLink<N>
  , tail: RawLink<N>
  , _ty_marker: PhantomData<T>
  , length: usize
 }

 // impl<T> Node for List<T>
 // where T: OwnedRef
 //     , T: Node {
 //
 //    fn next(&self) -> &RawLink<Self> { &self.head }
 //    fn prev(&self) -> &RawLink<Self> { &self.tail }
 //
 //    fn next_mut(&mut self) -> &mut RawLink<Self> { self.head }
 //    fn prev_mut(&mut self) -> &mut RawLink<Self> { self.tail }
 // }
impl<T, N> List<T, N>
where T: OwnedRef<N>
    , N: Node {

    pub const fn new() -> Self {
        List { head: RawLink::none()
             , tail: RawLink::none()
             , _ty_marker: PhantomData
             , length: 0 }
    }

    #[inline] pub fn len(&self) -> usize {
        self.length
    }

    #[inline] pub fn front(&self) -> Option<&N> {
        unsafe { self.head.resolve() }
    }

    #[inline] pub fn back(&self) -> Option<&N> {
        unsafe { self.tail.resolve() }
    }

    #[inline] pub fn front_mut(&mut self) -> Option<&mut N> {
        unsafe { self.head.resolve_mut() }
    }

    #[inline] pub fn back_mut(&mut self) -> Option<&mut N> {
        unsafe { self.tail.resolve_mut() }
    }

    #[inline] pub fn is_empty(&self) -> bool {
        self.head.is_none()
    }

    pub fn push_front(&mut self, mut item: T) {
        unsafe {
            match self.head.resolve_mut() {
                None => {
                    // If this node's head is empty, set the pushed item's
                    // links to None, and make this node's tail point to the
                    // pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::none();
                    self.tail = RawLink::some(item.get_mut());
                }
              , Some(head) => {
                    // If this node is not empty, set the pushed item's tail
                    // to point at the head node, and make the head node's tail
                    // point to the pushed item
                    *item.get_mut().next_mut() = RawLink::some(head);
                    *item.get_mut().prev_mut() = RawLink::none();
                    *head.prev_mut() = RawLink::some(item.get_mut());
                }
            }
            // then, set this node's head pointer to point to the pushed item
            self.head = RawLink::some(item.get_mut());
            item.take();
            self.length += 1;
        }
    }

    pub fn push_back(&mut self, mut item: T) {
        unsafe {
            match self.tail.resolve_mut() {
                None => {
                    // If this node's tail is empty, set the pushed item's
                    // links to  None, and make this node's head point to the
                    // pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::none();
                    self.head = RawLink::some(item.get_mut());
                }
              , Some(tail) => {
                    // If this node is not empty, set the pushed item's head
                    // to point at the tail node, and make the tail node's head
                    // point to the pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::some(tail);
                    *tail.next_mut() = RawLink::some(item.get_mut());
                }
            }
            // then, set this node's head pointer to point to the pushed item
            self.tail = RawLink::some(item.get_mut());
            item.take();
            self.length += 1;
        }
    }

    pub fn pop_front(&mut self) -> Option<T> {
        unsafe {
            self.head.take().resolve_mut()
                .map(|head| {
                    // mem::swap( &mut self.head
                    //          , head.next_mut().resolve_mut()
                    //                .map(|next| next.prev_mut())
                    //                .unwrap_or(&mut RawLink::none()) );
                    match head.next_mut().resolve_mut() {
                        None => self.tail = RawLink::none()
                      , Some(next) => {
                            *next.prev_mut() = RawLink::none();
                            self.head = RawLink::some(next);
                        }
                    }
                    self.length -= 1;
                    T::from_raw(head)
                })
        }
    }

    pub fn pop_back(&mut self) -> Option<T> {
        unsafe {
            self.tail.take().resolve_mut()
                .map(|tail| {
                    match tail.prev_mut().resolve_mut() {
                        None => self.head = RawLink::none()
                      , Some(prev) => {
                            *prev.next_mut() = RawLink::none();
                            self.tail = RawLink::some(prev);
                        }
                    }
                    self.length -= 1;
                    T::from_raw(tail)
                })
        }
    }

    pub fn peek_front(&self) -> Option<&N> {
        unsafe { self.tail.resolve() }
    }

    pub fn cursor<'a>(&'a mut self) -> ListCursor<'a, T, N> {
        ListCursor { list: self
                   , current: RawLink::none() }
    }

}

pub struct ListCursor<'a, T, N>
where T: OwnedRef<N>
    , T: 'a
    , N: Node
    , N: 'a {
        list: &'a mut List<T, N>
      , current: RawLink<N>
}

impl<'a, T, N> ListCursor<'a, T, N>
where T: OwnedRef<N>
    , T: 'a
    , N: Node
    , N: 'a {

    pub fn next(&mut self) -> Option<&mut N> {
        unsafe {
            match self.current.take().resolve_mut() {
                None => self.list.head.resolve_mut()
                            .and_then(|head| {
                                self.current = RawLink::some(head);
                                self.current.resolve_mut()
                            })
              , Some(thing) => {
                    self.current = match thing.next_mut().resolve_mut() {
                        None => RawLink::none()
                      , Some(other_thing) => RawLink::some(other_thing)
                    };
                    self.current.resolve_mut()
                }
            }
        }
    }

    pub fn peek_next(&self) -> Option<&N> {
        unsafe {
            self.current.resolve()
                .map_or( self.list.front()
                       , |curr| curr.next().resolve())
        }
    }

    pub fn remove(&mut self) -> Option<T> {
        unsafe {
            match self.current.resolve_mut() {
                None    => self.list.pop_front()
              , Some(c) =>
                    c.next_mut().take().resolve_mut()
                     .map(|p| {
                        match p.next_mut().resolve_mut() {
                            None => self.list.tail = RawLink::some(c)
                          , Some(n) => {
                                *n.prev_mut() = RawLink::some(c);
                                *c.next_mut() = RawLink::some(n);
                            }
                        }
                        T::from_raw(p)
                    })
            }
        }
    }

    pub fn find_and_remove<P>(&mut self, predicate: P) -> Option<T>
    where P: Fn(&N) -> bool {
        while self.peek_next().is_some() {
            if predicate(self.peek_next().unwrap()) == true {
                return self.remove()
            } else {
                self.next();
            }
        }
        None
    }

}

// impl<'a, T, N> Iterator for ListCursor<'a, T, N>
// where T: OwnedRef<N>
//     , T: 'a
//     , N: Node
//     , N: 'a {
//     type Item = &'a mut N;
//
//     fn next<'b: 'a>(&'b mut self) -> Option<&'a mut N> {
//         self.next()
//     }
// }

//
// unsafe impl<T> OwnedRef for Unique<T> where T: Node {
//
//     #[inline]
//     fn take(self) {}
//
//     unsafe fn from_raw(ptr: *mut T) -> Self {
//         Unique::new(ptr)
//     }
// }
//
// unsafe impl<'a, T> OwnedRef<T> for &'a mut T {
//     #
//     #[inline] unsafe fn from_raw(raw: *mut T) -> &'a mut T {
//         &mut *raw
//     }
//
//     #[inline] unsafe fn take(self) {
//         forget(self);
//     }
// }
//

unsafe impl<T> OwnedRef<T> for Unique<T>  {
    #[inline]
    fn get(&self) -> &T { unsafe { self.get() } }

    #[inline]
    fn get_mut(&mut self) -> &mut T { unsafe { self.get_mut() } }

    #[inline]
    unsafe fn take(self) {}

    unsafe fn from_raw(ptr: *mut T) -> Self {
        Unique::new(ptr)
    }
}

#[cfg(any(test, feature = "use-std"))]
unsafe impl<T> OwnedRef<T> for ::std::boxed::Box<T> {

    fn get(&self) -> &T { &**self }
    fn get_mut(&mut self) -> &mut T { &mut **self }

    #[inline] unsafe fn take(self) {
        ::std::boxed::Box::into_raw(self);
    }

    unsafe fn from_raw(ptr: *mut T) -> Self {
        ::std::boxed::Box::from_raw(ptr)
    }
}
<commit_msg>[intrusive] Add documentation to `List`<commit_after>//
//  SOS: the Stupid Operating System
//  by Hawk Weisman (hi@hawkweisman.me)
//
//  Copyright (c) 2015 Hawk Weisman
//  Released under the terms of the MIT license. See `LICENSE` in the root
//  directory of this repository for more information.
//
//! An intrusive linked list implementation using `RawLink`s.
//!
//! An _intrusive_ list is a list structure wherein the type of element stored
//! in the list holds references to other nodes. This means that we don't have
//! to store a separate node data type that holds the stored elements and
//! pointers to other nodes, reducing the amount of memory allocated. We can
//! use intrusive lists in code that runs without the kernel memory allocator,
//! like the allocator implementation itself, since each list element manages
//! its own memory.
use super::rawlink::RawLink;

use core::marker::PhantomData;
use core::ptr::Unique;
#[cfg(test)] mod test;

pub unsafe trait OwnedRef<T> {
    unsafe fn from_raw(ptr: *mut T) -> Self;
    unsafe fn take(self);
    fn get(&self) -> &T;
    fn get_mut(&mut self) -> &mut T;
}

/// This trait defines a node in an intrusive list.
///
/// A Node must be capable of providing mutable and immutable references to
/// the previous and next nodes in the list.
pub trait Node: Sized {
    fn next(&self) -> &RawLink<Self>;
    fn prev(&self) -> &RawLink<Self>;

    fn next_mut(&mut self) -> &mut RawLink<Self>;
    fn prev_mut(&mut self) -> &mut RawLink<Self>;
}

/// The `List` struct is our way of interacting with an intrusive list.
///
/// It stores a pointer to the head and tail of the list, the length of the
/// list, and a `PhantomData` marker for the list's `OwnedRef` type. It
/// provides the methods for pushing, popping, and indexing the list.
pub struct List<T, N>
where T: OwnedRef<N>
    , N: Node {
    head: RawLink<N>
  , tail: RawLink<N>
  , _ty_marker: PhantomData<T>
  , length: usize
 }

 // impl<T> Node for List<T>
 // where T: OwnedRef
 //     , T: Node {
 //
 //    fn next(&self) -> &RawLink<Self> { &self.head }
 //    fn prev(&self) -> &RawLink<Self> { &self.tail }
 //
 //    fn next_mut(&mut self) -> &mut RawLink<Self> { self.head }
 //    fn prev_mut(&mut self) -> &mut RawLink<Self> { self.tail }
 // }
impl<T, N> List<T, N>
where T: OwnedRef<N>
    , N: Node {

    /// Construct a new `List<T, N>` with zero elements
    pub const fn new() -> Self {
        List { head: RawLink::none()
             , tail: RawLink::none()
             , _ty_marker: PhantomData
             , length: 0 }
    }

    /// Returns the length of the list
    #[inline] pub fn len(&self) -> usize {
        self.length
    }

    /// Borrows the first element of the list as an `Option`
    ///
    /// # Returns:
    ///   - `Some(&N)` if the list has elements
    ///   - `None` if the list is empty.
    #[inline] pub fn front(&self) -> Option<&N> {
        unsafe { self.head.resolve() }
    }

    /// Borrows the last element of the list as an `Option`
    ///
    /// # Returns:
    ///   - `Some(&N)` if the list has elements
    ///   - `None` if the list is empty.
    #[inline] pub fn back(&self) -> Option<&N> {
        unsafe { self.tail.resolve() }
    }

    /// Mutably borrows the first element of the list as an `Option`
    ///
    /// # Returns:
    ///   - `Some(&mut N)` if the list has elements
    ///   - `None` if the list is empty.
    #[inline] pub fn front_mut(&mut self) -> Option<&mut N> {
        unsafe { self.head.resolve_mut() }
    }

    /// Mutably borrows the last element of the list as an `Option`
    ///
    /// # Returns:
    ///   - `Some(&mut N)` if the list has elements
    ///   - `None` if the list is empty.
    #[inline] pub fn back_mut(&mut self) -> Option<&mut N> {
        unsafe { self.tail.resolve_mut() }
    }

    /// Returns true if the list is empty.
    #[inline] pub fn is_empty(&self) -> bool {
        self.head.is_none()
    }

    /// Push an element to the front of the list.
    // TODO: should this really be called "prepend"?
    pub fn push_front(&mut self, mut item: T) {
        unsafe {
            match self.head.resolve_mut() {
                None => {
                    // If this node's head is empty, set the pushed item's
                    // links to None, and make this node's tail point to the
                    // pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::none();
                    self.tail = RawLink::some(item.get_mut());
                }
              , Some(head) => {
                    // If this node is not empty, set the pushed item's tail
                    // to point at the head node, and make the head node's tail
                    // point to the pushed item
                    *item.get_mut().next_mut() = RawLink::some(head);
                    *item.get_mut().prev_mut() = RawLink::none();
                    *head.prev_mut() = RawLink::some(item.get_mut());
                }
            }
            // then, set this node's head pointer to point to the pushed item
            self.head = RawLink::some(item.get_mut());
            item.take();
            self.length += 1;
        }
    }

    /// Push an element to the back of the list.
    //  TODO: should this really be called "append"?
    //  (the Rust standard library uses `append` to refer to the "drain all the
    //  elements of another list and push them to this list" operation, but I
    //  think that that function is more properly called `concat`...)
    pub fn push_back(&mut self, mut item: T) {
        unsafe {
            match self.tail.resolve_mut() {
                None => {
                    // If this node's tail is empty, set the pushed item's
                    // links to  None, and make this node's head point to the
                    // pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::none();
                    self.head = RawLink::some(item.get_mut());
                }
              , Some(tail) => {
                    // If this node is not empty, set the pushed item's head
                    // to point at the tail node, and make the tail node's head
                    // point to the pushed item
                    *item.get_mut().next_mut() = RawLink::none();
                    *item.get_mut().prev_mut() = RawLink::some(tail);
                    *tail.next_mut() = RawLink::some(item.get_mut());
                }
            }
            // then, set this node's head pointer to point to the pushed item
            self.tail = RawLink::some(item.get_mut());
            item.take();
            self.length += 1;
        }
    }

    /// Removes and returns the element at the front of the list.
    ///
    /// # Returns:
    ///   - `Some(T)` containing the element at the front of the list if the
    ///     list is not empty
    ///   - `None` if the list is empty
    pub fn pop_front(&mut self) -> Option<T> {
        unsafe {
            self.head.take().resolve_mut()
                .map(|head| {
                    // mem::swap( &mut self.head
                    //          , head.next_mut().resolve_mut()
                    //                .map(|next| next.prev_mut())
                    //                .unwrap_or(&mut RawLink::none()) );
                    match head.next_mut().resolve_mut() {
                        None => self.tail = RawLink::none()
                      , Some(next) => {
                            *next.prev_mut() = RawLink::none();
                            self.head = RawLink::some(next);
                        }
                    }
                    self.length -= 1;
                    T::from_raw(head)
                })
        }
    }

    /// Removes and returns the element at the end of the list.
    ///
    /// # Returns:
    ///   - `Some(T)` containing the element at the end of the list if the
    ///     list is not empty
    ///   - `None` if the list is empty
    pub fn pop_back(&mut self) -> Option<T> {
        unsafe {
            self.tail.take().resolve_mut()
                .map(|tail| {
                    match tail.prev_mut().resolve_mut() {
                        None => self.head = RawLink::none()
                      , Some(prev) => {
                            *prev.next_mut() = RawLink::none();
                            self.tail = RawLink::some(prev);
                        }
                    }
                    self.length -= 1;
                    T::from_raw(tail)
                })
        }
    }

    /// Borrows the element at the front of the list
    ///
    /// # Returns:
    ///   - `Some(&T)` containing the element at the end of the list if the
    ///     list is not empty
    ///   - `None` if the list is empty
    pub fn peek_front(&self) -> Option<&N> {
        unsafe { self.tail.resolve() }
    }

    /// Returns a cursor for iterating over or modifying the list.
    pub fn cursor<'a>(&'a mut self) -> ListCursor<'a, T, N> {
        ListCursor { list: self
                   , current: RawLink::none() }
    }

}

// TODO: can we implement `Iterator` for cursors?
pub struct ListCursor<'a, T, N>
where T: OwnedRef<N>
    , T: 'a
    , N: Node
    , N: 'a {
        list: &'a mut List<T, N>
      , current: RawLink<N>
}

impl<'a, T, N> ListCursor<'a, T, N>
where T: OwnedRef<N>
    , T: 'a
    , N: Node
    , N: 'a {

    pub fn next(&mut self) -> Option<&mut N> {
        unsafe {
            match self.current.take().resolve_mut() {
                None => self.list.head.resolve_mut()
                            .and_then(|head| {
                                self.current = RawLink::some(head);
                                self.current.resolve_mut()
                            })
              , Some(thing) => {
                    self.current = match thing.next_mut().resolve_mut() {
                        None => RawLink::none()
                      , Some(other_thing) => RawLink::some(other_thing)
                    };
                    self.current.resolve_mut()
                }
            }
        }
    }

    pub fn peek_next(&self) -> Option<&N> {
        unsafe {
            self.current.resolve()
                .map_or( self.list.front()
                       , |curr| curr.next().resolve())
        }
    }

    pub fn remove(&mut self) -> Option<T> {
        unsafe {
            match self.current.resolve_mut() {
                None    => self.list.pop_front()
              , Some(c) =>
                    c.next_mut().take().resolve_mut()
                     .map(|p| {
                        match p.next_mut().resolve_mut() {
                            None => self.list.tail = RawLink::some(c)
                          , Some(n) => {
                                *n.prev_mut() = RawLink::some(c);
                                *c.next_mut() = RawLink::some(n);
                            }
                        }
                        T::from_raw(p)
                    })
            }
        }
    }

    pub fn find_and_remove<P>(&mut self, predicate: P) -> Option<T>
    where P: Fn(&N) -> bool {
        while self.peek_next().is_some() {
            if predicate(self.peek_next().unwrap()) == true {
                return self.remove()
            } else {
                self.next();
            }
        }
        None
    }

}

// impl<'a, T, N> Iterator for ListCursor<'a, T, N>
// where T: OwnedRef<N>
//     , T: 'a
//     , N: Node
//     , N: 'a {
//     type Item = &'a mut N;
//
//     fn next<'b: 'a>(&'b mut self) -> Option<&'a mut N> {
//         self.next()
//     }
// }

//
// unsafe impl<T> OwnedRef for Unique<T> where T: Node {
//
//     #[inline]
//     fn take(self) {}
//
//     unsafe fn from_raw(ptr: *mut T) -> Self {
//         Unique::new(ptr)
//     }
// }
//
// unsafe impl<'a, T> OwnedRef<T> for &'a mut T {
//     #
//     #[inline] unsafe fn from_raw(raw: *mut T) -> &'a mut T {
//         &mut *raw
//     }
//
//     #[inline] unsafe fn take(self) {
//         forget(self);
//     }
// }
//

unsafe impl<T> OwnedRef<T> for Unique<T>  {
    #[inline]
    fn get(&self) -> &T { unsafe { self.get() } }

    #[inline]
    fn get_mut(&mut self) -> &mut T { unsafe { self.get_mut() } }

    #[inline]
    unsafe fn take(self) {}

    unsafe fn from_raw(ptr: *mut T) -> Self {
        Unique::new(ptr)
    }
}

#[cfg(any(test, feature = "use-std"))]
unsafe impl<T> OwnedRef<T> for ::std::boxed::Box<T> {

    fn get(&self) -> &T { &**self }
    fn get_mut(&mut self) -> &mut T { &mut **self }

    #[inline] unsafe fn take(self) {
        ::std::boxed::Box::into_raw(self);
    }

    unsafe fn from_raw(ptr: *mut T) -> Self {
        ::std::boxed::Box::from_raw(ptr)
    }
}
<|endoftext|>


<commit_before>/*!
Migrant can be used as a library so you can embed the management of migrations
into your binary and don't need to use a secondary tool in production environments.

The majority of `src/main.rs` could be copied, or just select functionality.
*/
extern crate migrant;

use std::env;
use migrant::Config;

pub fn main() {
    let dir = env::current_dir().unwrap();
    let config_path = match migrant::search_for_config(&dir) {
        None => {
            migrant::Config::init(&dir).expect("failed to initialize project");
            return;
        }
        Some(p) => p,
    };
    let config = Config::load(&config_path)
        .expect("failed to load config");

    // This will fail if no migration files are present!
    // Run all available `up` migrations
    // migrant::Migrator::with_config(&config)
    //     .direction(migrant::Direction::Up)
    //     .all(true)
    //     .apply()
    //     .expect("failed to apply migrations")

    migrant::list(&config)
        .expect("failed to list migrations");
}
<commit_msg>update embed example<commit_after>/*!
Migrant can be used as a library so you can embed the management of migrations
into your binary and don't need to use a secondary tool in production environments.

The majority of `src/main.rs` could be copied, or just select functionality.
*/
extern crate migrant;

use std::env;
use migrant::Config;

pub fn main() {
    let dir = env::current_dir().unwrap();
    let config = match migrant::search_for_config(&dir) {
        None => {
            migrant::Config::init(&dir).expect("failed to initialize project");
            return;
        }
        Some(p) => Config::load(&p).expect("failed to load config"),
    };

    // This will fail if no migration files are present!
    // Run all available `up` migrations
    // migrant::Migrator::with_config(&config)
    //     .direction(migrant::Direction::Up)
    //     .all(true)
    //     .apply()
    //     .expect("failed to apply migrations")

    migrant::list(&config)
        .expect("failed to list migrations");
}
<|endoftext|>


<commit_before>extern crate minifb;

use minifb::{Window, Key, Scale, WindowOptions};

const WIDTH: usize = 2560;
const HEIGHT: usize = 360;

fn main() {
    let mut noise;
    let mut carry;
    let mut seed = 0xbeefu32;

    let mut window = match Window::new("Noise Test - Press ESC to exit", WIDTH, HEIGHT,
                                       WindowOptions {
                                           resize: true,
                                           scale: Scale::X2,
                                           ..WindowOptions::default()
                                       }) {
        Ok(win) => win,
        Err(err) => {
            println!("Unable to create window {}", err);
            return;
        }
    };

    let mut buffer: Vec<u32> = Vec::with_capacity(WIDTH * HEIGHT);

    let mut size = (0, 0);

    while window.is_open() && !window.is_key_down(Key::Escape) {
        {
            let new_size = window.get_size();
            if new_size != size {
                size = new_size;
                buffer.resize(size.0 * size.1 / 2 / 2, 0);
            }
        }

        for i in buffer.iter_mut() {
            noise = seed;
            noise >>= 3;
            noise ^= seed;
            carry = noise & 1;
            noise >>= 1;
            seed >>= 1;
            seed |= carry << 30;
            noise &= 0xFF;
            *i = (noise << 16) | (noise << 8) | noise;
        }

        window.get_keys().map(|keys| {
            for t in keys {
                match t {
                    Key::W => println!("holding w!"),
                    Key::T => println!("holding t!"),
                    _ => (),
                }
            }
        });

        // We unwrap here as we want this code to exit if it fails
        window.update_with_buffer(&buffer).unwrap();
    }
}
<commit_msg>Set back width to 640<commit_after>extern crate minifb;

use minifb::{Window, Key, Scale, WindowOptions};

const WIDTH: usize = 640;
const HEIGHT: usize = 360;

fn main() {
    let mut noise;
    let mut carry;
    let mut seed = 0xbeefu32;

    let mut window = match Window::new("Noise Test - Press ESC to exit", WIDTH, HEIGHT,
                                       WindowOptions {
                                           resize: true,
                                           scale: Scale::X2,
                                           ..WindowOptions::default()
                                       }) {
        Ok(win) => win,
        Err(err) => {
            println!("Unable to create window {}", err);
            return;
        }
    };

    let mut buffer: Vec<u32> = Vec::with_capacity(WIDTH * HEIGHT);

    let mut size = (0, 0);

    while window.is_open() && !window.is_key_down(Key::Escape) {
        {
            let new_size = window.get_size();
            if new_size != size {
                size = new_size;
                buffer.resize(size.0 * size.1 / 2 / 2, 0);
            }
        }

        for i in buffer.iter_mut() {
            noise = seed;
            noise >>= 3;
            noise ^= seed;
            carry = noise & 1;
            noise >>= 1;
            seed >>= 1;
            seed |= carry << 30;
            noise &= 0xFF;
            *i = (noise << 16) | (noise << 8) | noise;
        }

        window.get_keys().map(|keys| {
            for t in keys {
                match t {
                    Key::W => println!("holding w!"),
                    Key::T => println!("holding t!"),
                    _ => (),
                }
            }
        });

        // We unwrap here as we want this code to exit if it fails
        window.update_with_buffer(&buffer).unwrap();
    }
}
<|endoftext|>


<commit_before>use std::any::TypeId;
use std::usize;

use super::super::data::Empty;
use super::value_ptr::{ValuePtr, ValuePtrList, VoidPtr};
use super::clone::clone_value_ptr;
use super::drop::drop_value_ptr;
use super::execute::Executor;
use super::compiler::FnRef;

pub fn list(
   arguments: &[&ValuePtr],
   executor: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   let mut list = Vec::new();

   for value_ptr in arguments.iter() {
      list.push(
         clone_value_ptr(value_ptr, executor.clone_registry)
      );
   }

   vecval!(list)
}

macro_rules! push_result {
   ($result:ident, $values:ident) => {
      $result.push(
         if $values.len() == 1 {
            $values.remove(0)
         } else {
            ValuePtr::new($values)
         }
      );
   }
}

pub fn each(
   arguments: &[&ValuePtr],
   executor: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   let list = value_ptr_as_ref!(arguments[0], ValuePtrList);

   let fn_ref = value_ptr_as_ref!(arguments[1], FnRef);

   let mut result = Vec::new();

   for value_ptr in list.iter() {
      let mut call_arguments = vec![value_ptr];

      for arg in arguments[2..].iter() {
         call_arguments.push(*arg);
      }

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn each_with_last(
   arguments: &[&ValuePtr],
   executor: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   if arguments.len() < 3 {
      return vecval!(Empty);
   }

   let list = value_ptr_as_ref!(arguments[0], ValuePtrList);

   let fn_ref = value_ptr_as_ref!(arguments[1], FnRef);

   let mut result = Vec::new();

   let mut last_item = arguments[2].clone();

   for value_ptr in list.iter() {
      let mut values = {
         let mut call_arguments = vec![value_ptr, &last_item];

         for arg in arguments[3..].iter() {
            call_arguments.push(*arg);
         }

         executor.execute_function(fn_ref, &call_arguments)
      };

      let value = if values.len() == 1 {
         values.remove(0)
      } else {
         ValuePtr::new(values)
      };

      last_item = value.clone();

      result.push(value);
   }

   vecval!(result)
}

pub fn each_with_index(
   arguments: &[&ValuePtr],
   executor: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   let list = value_ptr_as_ref!(arguments[0], ValuePtrList);

   let fn_ref = value_ptr_as_ref!(arguments[1], FnRef);

   let mut result = Vec::new();

   for (index, value_ptr) in list.iter().enumerate() {
      let index_value = ValuePtr::new(index as i64);

      let mut call_arguments = vec![value_ptr, &index_value];

      for arg in arguments[2..].iter() {
         call_arguments.push(*arg);
      }

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);

      drop_value_ptr(&index_value, executor.drop_registry);
   }

   vecval!(result)
}

pub fn zip(
   arguments: &[&ValuePtr],
   executor: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   if arguments.len() == 0 {
      return vecval!(Empty);
   }

   let mut lists = Vec::with_capacity(arguments.len());

   let mut min_len = usize::MAX;

   for value_ptr in arguments.iter() {
      if TypeId::of::<ValuePtrList>() == value_ptr.type_id {
         let list = value_ptr_as_ref!(value_ptr, ValuePtrList);

         if list.len() < min_len {
            min_len = list.len();
         }

         lists.push(list);
      } else {
         return vecval!(Empty);
      }
   }

   let mut result: ValuePtrList = Vec::new();

   for i in 0..min_len {
      let mut inner: ValuePtrList = Vec::new();

      for list in lists.iter() {
         inner.push(
            clone_value_ptr(&list[i], executor.clone_registry)
         );
      }

      result.push(ValuePtr::new(inner));
   }

   vecval!(result)
}

pub fn range(
   arguments: &[&ValuePtr],
   _: &Executor,
   _: &FnRef
) -> Vec<ValuePtr> {

   let start = value_ptr_as_ref!(arguments[0], i64);

   let end = value_ptr_as_ref!(arguments[1], i64);

   let mut result = Vec::new();

   for value in *start..*end {
      result.push(ValuePtr::new(value));
   }

   vecval!(result)
}

pub fn list_val_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {

   let left = arguments[0];
   let right = value_ptr_as_ref!(arguments[1], ValuePtrList);

   let mut result = Vec::new();

   for value_ptr in right.iter() {
      let call_arguments = vec![left, value_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_val(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {

   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let right = arguments[1];

   let mut result = Vec::new();

   for value_ptr in left.iter() {
      let call_arguments = vec![value_ptr, right];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {

   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let right = value_ptr_as_ref!(arguments[1], ValuePtrList);

   let mut result = Vec::new();

   for (left_ptr, right_ptr) in left.iter().zip(right.iter()) {
      let call_arguments = vec![left_ptr, right_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_val_val(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let middle = arguments[1];
   let right = arguments[2];

   let mut result = Vec::new();

   for value_ptr in left.iter() {
      let call_arguments = vec![value_ptr, middle, right];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_val_lst_val(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = arguments[0];
   let middle = value_ptr_as_ref!(arguments[1], ValuePtrList);
   let right = arguments[2];

   let mut result = Vec::new();

   for value_ptr in middle.iter() {
      let call_arguments = vec![left, value_ptr, right];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_val_val_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = arguments[0];
   let middle = arguments[1];
   let right = value_ptr_as_ref!(arguments[2], ValuePtrList);

   let mut result = Vec::new();

   for value_ptr in right.iter() {
      let call_arguments = vec![left, middle, value_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_lst_val(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let middle = value_ptr_as_ref!(arguments[1], ValuePtrList);
   let right = arguments[2];

   let mut result = Vec::new();

   for (left_ptr, middle_ptr) in left.iter().zip(middle.iter()) {
      let call_arguments = vec![left_ptr, middle_ptr, right];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_val_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let middle = arguments[1];
   let right = value_ptr_as_ref!(arguments[2], ValuePtrList);

   let mut result = Vec::new();

   for (left_ptr, right_ptr) in left.iter().zip(right.iter()) {
      let call_arguments = vec![left_ptr, middle, right_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_val_lst_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = arguments[0];
   let middle = value_ptr_as_ref!(arguments[1], ValuePtrList);
   let right = value_ptr_as_ref!(arguments[2], ValuePtrList);

   let mut result = Vec::new();

   for (middle_ptr, right_ptr) in middle.iter().zip(right.iter()) {
      let call_arguments = vec![left, middle_ptr, right_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

pub fn list_lst_lst_lst(
   arguments: &[&ValuePtr],
   executor: &Executor,
   fn_ref: &FnRef
) -> Vec<ValuePtr> {
   let left = value_ptr_as_ref!(arguments[0], ValuePtrList);
   let middle = value_ptr_as_ref!(arguments[1], ValuePtrList);
   let right = value_ptr_as_ref!(arguments[2], ValuePtrList);

   let mut result = Vec::new();

   for ((left_ptr, middle_ptr), right_ptr) in left.iter().zip(middle.iter()).zip(right.iter()) {
      let call_arguments = vec![left_ptr, middle_ptr, right_ptr];

      let mut values = executor.execute_function(fn_ref, &call_arguments);

      push_result!(result, values);
   }

   vecval!(result)
}

<commit_msg>Forgotten file<commit_after><|endoftext|>


<commit_before>extern crate gui = "snowmew-gui";
extern crate sync;

mod Manager {
    use gui;
    use sync;

    struct Pinged {
        count: sync::Arc<sync::Mutex<uint>>
    }

    impl gui::Handler for Pinged {
        fn handle(&mut self, _: gui::Event, _: |id: gui::ItemId, evt: gui::Event|) {
            let mut guard = self.count.lock();
            *guard += 1;
        }
    }

    #[test]
    fn add() {
        let count = sync::Arc::new(sync::Mutex::new(0));
        let mut manager = gui::Manager::new();

        let widget = ~Pinged {
            count: count.clone()
        };

        let id = manager.add(widget);
        manager.root(id);

        manager.event(gui::MouseEvent(gui::Mouse::new()));

        let guard = count.lock();
        assert!(*guard == 1);
    }
}

mod Layout {
    use gui;

    #[test]
    fn item() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);

        assert!(None == layout.get_item(-1., -1.))
        assert!(None == layout.get_item(100., 100.))
        assert!(None == layout.get_item(0., 100.))
        assert!(None == layout.get_item(100., 0.))

        assert!(Some(10) == layout.get_item(0., 0.))
        assert!(Some(10) == layout.get_item(99., 99.))
    }

    #[test]
    fn item_ztest() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);
        layout.add((25., 25.), (75., 75.), 2., 11);

        assert!(None == layout.get_item(-1., -1.))
        assert!(None == layout.get_item(100., 100.))
        assert!(None == layout.get_item(0., 100.))
        assert!(None == layout.get_item(100., 0.))

        assert!(Some(10) == layout.get_item(0., 0.))
        assert!(Some(11) == layout.get_item(25., 25.))
        assert!(Some(11) == layout.get_item(99., 99.))
    }

    #[test]
    fn get_pos() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);
        layout.add((25., 25.), (75., 75.), 2., 11);

        assert!(Some((0., 0.)) == layout.pos(10))
        assert!(Some((25., 25.)) == layout.pos(11))
    }
}

mod Button {
    use gui;

    #[test]
    fn button_press() {
        use gui::Handler;
        let mut button = gui::Button::new();
        let mut mouse = gui::Mouse::new();
        let mut event = None;

        button.setup(10);

        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            fail!("Should not have got and event {:?} {:?}", id, evt)
        });

        mouse.button[0] = true;
        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            event = Some((id, evt));
        });

        if event.is_none() {
            fail!("Missing event")
        }

        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            fail!("Should not have got and event on mouse hold {:?} {:?}", id, evt)
        });

        mouse.button[0] = false;
        event = None;
        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            event = Some((id, evt));
        });

        if event.is_none() {
            fail!("Missing event")
        }
    }
}<commit_msg>expect instead of if<commit_after>extern crate gui = "snowmew-gui";
extern crate sync;

mod Manager {
    use gui;
    use sync;

    struct Pinged {
        count: sync::Arc<sync::Mutex<uint>>
    }

    impl gui::Handler for Pinged {
        fn handle(&mut self, _: gui::Event, _: |id: gui::ItemId, evt: gui::Event|) {
            let mut guard = self.count.lock();
            *guard += 1;
        }
    }

    #[test]
    fn add() {
        let count = sync::Arc::new(sync::Mutex::new(0));
        let mut manager = gui::Manager::new();

        let widget = ~Pinged {
            count: count.clone()
        };

        let id = manager.add(widget);
        manager.root(id);

        manager.event(gui::MouseEvent(gui::Mouse::new()));

        let guard = count.lock();
        assert!(*guard == 1);
    }
}

mod Layout {
    use gui;

    #[test]
    fn item() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);

        assert!(None == layout.get_item(-1., -1.))
        assert!(None == layout.get_item(100., 100.))
        assert!(None == layout.get_item(0., 100.))
        assert!(None == layout.get_item(100., 0.))

        assert!(Some(10) == layout.get_item(0., 0.))
        assert!(Some(10) == layout.get_item(99., 99.))
    }

    #[test]
    fn item_ztest() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);
        layout.add((25., 25.), (75., 75.), 2., 11);

        assert!(None == layout.get_item(-1., -1.))
        assert!(None == layout.get_item(100., 100.))
        assert!(None == layout.get_item(0., 100.))
        assert!(None == layout.get_item(100., 0.))

        assert!(Some(10) == layout.get_item(0., 0.))
        assert!(Some(11) == layout.get_item(25., 25.))
        assert!(Some(11) == layout.get_item(99., 99.))
    }

    #[test]
    fn get_pos() {
        let mut layout = gui::Layout::new();
        layout.add((0., 0.), (100., 100.), 1., 10);
        layout.add((25., 25.), (75., 75.), 2., 11);

        assert!(Some((0., 0.)) == layout.pos(10))
        assert!(Some((25., 25.)) == layout.pos(11))
    }
}

mod Button {
    use gui;

    #[test]
    fn button_press() {
        use gui::Handler;
        let mut button = gui::Button::new();
        let mut mouse = gui::Mouse::new();
        let mut event = None;

        button.setup(10);

        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            fail!("Should not have got and event {:?} {:?}", id, evt)
        });

        mouse.button[0] = true;
        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            event = Some((id, evt));
        });

        event.expect("Missing event");

        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            fail!("Should not have got and event on mouse hold {:?} {:?}", id, evt)
        });

        mouse.button[0] = false;
        event = None;
        button.handle(gui::MouseEvent(mouse.clone()), |id, evt| {
            event = Some((id, evt));
        });

        event.expect("Missing event");
    }
}<|endoftext|>


<commit_before>use super::data::*;

/// Holds all information relative to the graphics subsystem.
/// Includes computed data like the framebuffer, in a format that can be drawn to screen.
pub struct GPU {
    mode: Mode,
    vblank_int: bool,
    line: u8,
    cycles: u32,
    vram: VideoMemory,
    lcdc: LCDControl,
    lcdp: LCDPosition,
    framebuffer: [(u8, u8, u8); 160 * 144]
}

impl GPU {
    pub fn new() -> GPU {
        GPU {
            mode: Mode::HBlank,
            vblank_int: false,
            line: 0,
            cycles: 0,
            vram: VideoMemory { data: [0; 8192], oam: [0; 160] },
            lcdc: LCDControl::new(),
            lcdp: LCDPosition::new(),
            framebuffer: [(0, 0, 0); 160 * 144],
        }
    }

    /// Retrieves Tile information from the VRAM.
    /// A tile is held in 16 bytes in the VRAM, enough information for 64 pixels (8x8 matrix, 2 bits per pixel).
    /// When selecting tiles from Set #1, the index 0 represents tile -128 (equal to tile 128 from Set #0)
    fn get_tile(&self, set: TileSelector, tile_index: usize) -> Tile {
        // Set1 starts after 128 tiles, or after 16 * 128 = 2048 (0x800) bytes
        let offset = if let TileSelector::Set1 = set { 0x800 } else { 0 };
        let start_addr = (offset + tile_index) * 0x10;
        let end_addr = start_addr + 0x10;

        let mut addr = start_addr;
        let mut pixels = [GBColor::Off; 64];

        // this is basically a for with step 2. Iterates 8 times (two bytes read at a time).
        while addr < end_addr {
            let (low, high) = (self.vram.data[addr], self.vram.data[addr + 1]);

            for i in 0..8 {
                let low_bit = (low >> i) & 0x01;
                let high_bit = (high >> i) & 0x01;

                let pixel_value = GBColor::from_u8(low_bit + high_bit * 2);
                // px 0..7, then 8..15
                let pixel_addr = (addr / 2) * 8 + i;
                pixels[pixel_addr] = pixel_value;
            }

            addr += 2;
        }

        Tile { pixels: pixels }
    }

    /// Retrieves a single pixel from a given tile index.
    /// The pixel index is a number between 0 and 63.
    fn get_tile_pixel(&self, set: TileSelector, tile_index: usize, pixel_index: usize) -> GBColor {
        let offset = if let TileSelector::Set1 = set { 0x800 } else { 0 };
        let start_addr = (offset + tile_index) * 0x10;

        let addr = start_addr + ((pixel_index / 8) as usize) * 2;
        let (low, high) = (self.vram.data[addr], self.vram.data[addr + 1]);
        let i = pixel_index % 8;
        let low_bit = (low >> i) & 0x01;
        let high_bit = (high >> i) & 0x01;

        GBColor::from_u8(low_bit + high_bit * 2)
    }

    /// Retrieves a slice of the framebuffer.
    pub fn get_framebuffer(&mut self) -> &[(u8, u8, u8)]{
        if self.vblank_int {
            self.vblank_int = false;
        }

        &self.framebuffer
    }

    /// Renders a single scanline to the framebuffer, from the internal tile data.
    fn render_scanline(&mut self) {
        // map offset starts from 0x1C00 (for tileset #1) or 0x1800 (for tileset #0)
        let mut y_offset : u16 = if let TileSelector::Set1 = self.lcdc.bg_tile_map { 0x1C00 } else { 0x1800 };

        // add vertical offset (y_scroll plus the scanline we are at right now)
        // line and scroll_y are on a per pixel basis, shifting right by 3 gets the tile index offset
        y_offset += ((self.line as u8).wrapping_add(self.lcdp.scroll_y) >> 3) as u16;

        // same for x tile offset
        let mut x_offset = (self.lcdp.scroll_x >> 3) as u16;

        // x,y are the 3 least significant bits in the offsets
        // they represent the coordinates of the pixel inside a tile
        let y = (y_offset & 0x07) as usize;
        let mut x = (x_offset & 0x07) as usize;

        // starting scanline where we will write on the framebuffer
        let fb_offset = (self.line as usize) * 160;

        // read the tile index from the vram at the computed offset
        let mut tile_index = self.read_vram((y_offset + x_offset) as usize);

        // compute each of the 160 pixels in a scanline
        for i in 0..160 {
            // TODO: maybe load tile lines instead of single pixels, less function calls.
            let pixel = self.get_tile_pixel(self.lcdc.bg_tile_map, tile_index as usize, x + y);

            self.framebuffer[fb_offset + i] = pixel.to_u8u8u8();
            x += 1;

            if x == 8 {
                // reached end of current tile, go to the next one (right)
                x = 0;
                // tiles wrap horizontally (every 32)
                x_offset = (x_offset + 1) % 32;
                tile_index = self.read_vram((y_offset + x_offset) as usize);
            }
        }

    }

    pub fn write_vram(&mut self, addr: usize, value: u8) {
        // if let Mode::VRAMRead = self.mode { panic!("Attempted write to VRAM during VRAMRead mode") };
        self.vram.data[addr] = value;
    }

    pub fn read_vram(&self, addr: usize) -> u8 {
        // if let Mode::VRAMRead = self.mode { panic!("Attempted access to VRAM during VRAMRead mode") };
        self.vram.data[addr]
    }

    pub fn write_oam(&mut self, addr: usize, value: u8) {
        // if let Mode::OAMRead = self.mode { panic!("Attempted write to OAM during OAMRead mode") };
        self.vram.oam[addr] = value;
    }

    pub fn read_oam(&self, addr: usize) -> u8 {
        // if let Mode::OAMRead = self.mode { panic!("Attempted access to OAM during OAMRead mode") };
        self.vram.oam[addr]
    }

    pub fn read_register(&self, addr: usize) -> u8 {
        match addr {
            0xFF40 => self.lcdc.as_u8(), // LCDC
            0xFF42 => self.lcdp.scroll_x,
            0xFF43 => self.lcdp.scroll_y,
            0xFF44 => self.line, // current scanline
            0xFF47 => panic!("Palette is write only!"),
            _ => panic!("Attempted GPU register access with addr {:4x}", addr),
        }
    }

    pub fn write_register(&mut self, addr: usize, data: u8) {
        match addr {
            0xFF40 => self.lcdc.set_from_u8(data), // LCDC
            0xFF42 => { self.lcdp.scroll_x = data },
            0xFF43 => { self.lcdp.scroll_y = data },
            0xFF44 => { self.line = data }, // current scanline
            0xFF47 => {
                // TODO: figure palette writing (is it needed for CGB only?)
             },
            _ => panic!("Attempted GPU register write with addr {:4x}", addr),
        };
    }

    /// Emulates the GPU.
    /// This function should be called after an instruction is executed by the CPU,
    /// `delta` is the number of cycles passed from the last instruction.
    pub fn emulate(&mut self, delta: u32) {

        self.cycles += delta;

        match self.mode {
            Mode::OAMRead => {
                if self.cycles >= 80 {
                    self.cycles = 0;
                    self.mode = Mode::VRAMRead;
                }
            }
            Mode::VRAMRead => {
                if self.cycles >= 172 {
                    self.cycles = 0;
                    self.mode = Mode::HBlank;

                    // scanline is done, write it to framebuffer
                    self.render_scanline();
                }
            }
            Mode::HBlank => {
                if self.cycles >= 204 {
                    self.cycles = 0;
                    self.line += 1;

                    self.mode = if self.line == 143 {
                        // TODO: push framebuffer data to frontend now (interrupt)
                        self.vblank_int = true;
                        Mode::VBlank

                    } else {
                        Mode::OAMRead
                    };
                }
            }
            Mode::VBlank => {
                if self.cycles >= 456 {
                    self.cycles = 0;
                    self.line += 1;

                    if self.line > 153 {
                        self.mode = Mode::OAMRead;
                        self.line = 0;
                    }
                }
            }
        }
    }
}

#[test]
fn get_tile_test() {
    let mut gpu = GPU::new();
    // write first line of tile #0 in set #0
    // pixels should be: 0 1 2 3 3 2 1 0
    gpu.write_vram(0, 0b0101_1010u8);
    gpu.write_vram(1, 0b0011_1100u8);

    let tile = gpu.get_tile(TileSelector::Set0, 0);

    assert_eq!(tile.pixels[0], GBColor::Off);
    assert_eq!(tile.pixels[1], GBColor::On33);
    assert_eq!(tile.pixels[2], GBColor::On66);
    assert_eq!(tile.pixels[3], GBColor::On);

    assert_eq!(tile.pixels[4], GBColor::On);
    assert_eq!(tile.pixels[5], GBColor::On66);
    assert_eq!(tile.pixels[6], GBColor::On33);
    assert_eq!(tile.pixels[7], GBColor::Off);

    // rest of the pixels are off
    for i in 8..64 {
        assert_eq!(tile.pixels[i], GBColor::Off);
    }
}

#[test]
fn get_pixel_test() {
    let mut gpu = GPU::new();
    // write first line of tile #0 in set #0
    // pixels should be: 0 1 2 3 3 2 1 0
    gpu.write_vram(0, 0b0101_1010u8);
    gpu.write_vram(1, 0b0011_1100u8);

    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 0), GBColor::Off);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 1), GBColor::On33);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 2), GBColor::On66);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 3), GBColor::On);

    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 4), GBColor::On);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 5), GBColor::On66);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 6), GBColor::On33);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 7), GBColor::Off);
}
<commit_msg>Removed unnecessary fields from gpu<commit_after>use super::data::*;

/// Holds all information relative to the graphics subsystem.
/// Includes computed data like the framebuffer, in a format that can be drawn to screen.
pub struct GPU {
    line: u8,
    cycles: u32,
    vram: VideoMemory,
    lcdc: LCDControl,
    lcdp: LCDPosition,
    lcds: LCDStatus,
    framebuffer: [(u8, u8, u8); 160 * 144]
}

impl GPU {
    pub fn new() -> GPU {
        GPU {
            line: 0,
            cycles: 0,
            vram: VideoMemory { data: [0; 8192], oam: [0; 160] },
            lcdc: LCDControl::new(),
            lcdp: LCDPosition::new(),
            lcds: LCDStatus::new(),
            framebuffer: [(0, 0, 0); 160 * 144],
        }
    }

    /// Retrieves Tile information from the VRAM.
    /// A tile is held in 16 bytes in the VRAM, enough information for 64 pixels (8x8 matrix, 2 bits per pixel).
    /// When selecting tiles from Set #1, the index 0 represents tile -128 (equal to tile 128 from Set #0)
    fn get_tile(&self, set: TileSelector, tile_index: usize) -> Tile {
        // Set1 starts after 128 tiles, or after 16 * 128 = 2048 (0x800) bytes
        let offset = if let TileSelector::Set1 = set { 0x800 } else { 0 };
        let start_addr = (offset + tile_index) * 0x10;
        let end_addr = start_addr + 0x10;

        let mut addr = start_addr;
        let mut pixels = [GBColor::Off; 64];

        // this is basically a for with step 2. Iterates 8 times (two bytes read at a time).
        while addr < end_addr {
            let (low, high) = (self.vram.data[addr], self.vram.data[addr + 1]);

            for i in 0..8 {
                let low_bit = (low >> i) & 0x01;
                let high_bit = (high >> i) & 0x01;

                let pixel_value = GBColor::from_u8(low_bit + high_bit * 2);
                // px 0..7, then 8..15
                let pixel_addr = (addr / 2) * 8 + i;
                pixels[pixel_addr] = pixel_value;
            }

            addr += 2;
        }

        Tile { pixels: pixels }
    }

    /// Retrieves a single pixel from a given tile index.
    /// The pixel index is a number between 0 and 63.
    fn get_tile_pixel(&self, set: TileSelector, tile_index: usize, pixel_index: usize) -> GBColor {
        let offset = if let TileSelector::Set1 = set { 0x800 } else { 0 };
        let start_addr = (offset + tile_index) * 0x10;

        let addr = start_addr + ((pixel_index / 8) as usize) * 2;
        let (low, high) = (self.vram.data[addr], self.vram.data[addr + 1]);
        let i = pixel_index % 8;
        let low_bit = (low >> i) & 0x01;
        let high_bit = (high >> i) & 0x01;

        GBColor::from_u8(low_bit + high_bit * 2)
    }

    /// Retrieves a slice of the framebuffer.
    pub fn get_framebuffer(&mut self) -> &[(u8, u8, u8)]{
        if self.lcds.vblank_irq {
            self.lcds.vblank_irq = false;
        }

        &self.framebuffer
    }

    /// Renders a single scanline to the framebuffer, from the internal tile data.
    fn render_scanline(&mut self) {
        // map offset starts from 0x1C00 (for tileset #1) or 0x1800 (for tileset #0)
        let mut y_offset : u16 = if let TileSelector::Set1 = self.lcdc.bg_tile_map { 0x1C00 } else { 0x1800 };

        // add vertical offset (y_scroll plus the scanline we are at right now)
        // line and scroll_y are on a per pixel basis, shifting right by 3 gets the tile index offset
        y_offset += ((self.line as u8).wrapping_add(self.lcdp.scroll_y) >> 3) as u16;

        // same for x tile offset
        let mut x_offset = (self.lcdp.scroll_x >> 3) as u16;

        // x,y are the 3 least significant bits in the offsets
        // they represent the coordinates of the pixel inside a tile
        let y = (y_offset & 0x07) as usize;
        let mut x = (x_offset & 0x07) as usize;

        // starting scanline where we will write on the framebuffer
        let fb_offset = (self.line as usize) * 160;

        // read the tile index from the vram at the computed offset
        let mut tile_index = self.read_vram((y_offset + x_offset) as usize);

        // compute each of the 160 pixels in a scanline
        for i in 0..160 {
            // TODO: maybe load tile lines instead of single pixels, less function calls.
            let pixel = self.get_tile_pixel(self.lcdc.bg_tile_map, tile_index as usize, x + y);

            self.framebuffer[fb_offset + i] = pixel.to_u8u8u8();
            x += 1;

            if x == 8 {
                // reached end of current tile, go to the next one (right)
                x = 0;
                // tiles wrap horizontally (every 32)
                x_offset = (x_offset + 1) % 32;
                tile_index = self.read_vram((y_offset + x_offset) as usize);
            }
        }

    }

    pub fn write_vram(&mut self, addr: usize, value: u8) {
        // if let Mode::VRAMRead = self.lcds.mode { panic!("Attempted write to VRAM during VRAMRead mode") };
        self.vram.data[addr] = value;
    }

    pub fn read_vram(&self, addr: usize) -> u8 {
        // if let Mode::VRAMRead = self.lcds.mode { panic!("Attempted access to VRAM during VRAMRead mode") };
        self.vram.data[addr]
    }

    pub fn write_oam(&mut self, addr: usize, value: u8) {
        // if let Mode::OAMRead = self.lcds.mode { panic!("Attempted write to OAM during OAMRead mode") };
        self.vram.oam[addr] = value;
    }

    pub fn read_oam(&self, addr: usize) -> u8 {
        // if let Mode::OAMRead = self.lcds.mode { panic!("Attempted access to OAM during OAMRead mode") };
        self.vram.oam[addr]
    }

    pub fn read_register(&self, addr: usize) -> u8 {
        match addr {
            0xFF40 => self.lcdc.as_u8(), // LCDC
            0xFF42 => self.lcdp.scroll_x,
            0xFF43 => self.lcdp.scroll_y,
            0xFF44 => self.line, // current scanline
            0xFF47 => panic!("Palette is write only!"),
            _ => panic!("Attempted GPU register access with addr {:4x}", addr),
        }
    }

    pub fn write_register(&mut self, addr: usize, data: u8) {
        match addr {
            0xFF40 => self.lcdc.set_from_u8(data), // LCDC
            0xFF42 => { self.lcdp.scroll_x = data },
            0xFF43 => { self.lcdp.scroll_y = data },
            0xFF44 => { self.line = data }, // current scanline
            0xFF47 => {
                // TODO: figure palette writing (is it needed for CGB only?)
             },
            _ => panic!("Attempted GPU register write with addr {:4x}", addr),
        };
    }

    /// Emulates the GPU.
    /// This function should be called after an instruction is executed by the CPU,
    /// `delta` is the number of cycles passed from the last instruction.
    pub fn emulate(&mut self, delta: u32) {

        self.cycles += delta;

        match self.lcds.mode {
            Mode::OAMRead => {
                if self.cycles >= 80 {
                    self.cycles = 0;
                    self.lcds.mode = Mode::VRAMRead;
                }
            }
            Mode::VRAMRead => {
                if self.cycles >= 172 {
                    self.cycles = 0;
                    self.lcds.mode = Mode::HBlank;

                    // scanline is done, write it to framebuffer
                    self.render_scanline();
                }
            }
            Mode::HBlank => {
                if self.cycles >= 204 {
                    self.cycles = 0;
                    self.line += 1;

                    self.lcds.mode = if self.line == 143 {
                        // TODO: push framebuffer data to frontend now (interrupt)
                        self.lcds.vblank_irq = true;
                        Mode::VBlank

                    } else {
                        Mode::OAMRead
                    };
                }
            }
            Mode::VBlank => {
                if self.cycles >= 456 {
                    self.cycles = 0;
                    self.line += 1;

                    if self.line > 153 {
                        self.lcds.mode = Mode::OAMRead;
                        self.line = 0;
                    }
                }
            }
        }
    }
}

#[test]
fn get_tile_test() {
    let mut gpu = GPU::new();
    // write first line of tile #0 in set #0
    // pixels should be: 0 1 2 3 3 2 1 0
    gpu.write_vram(0, 0b0101_1010u8);
    gpu.write_vram(1, 0b0011_1100u8);

    let tile = gpu.get_tile(TileSelector::Set0, 0);

    assert_eq!(tile.pixels[0], GBColor::Off);
    assert_eq!(tile.pixels[1], GBColor::On33);
    assert_eq!(tile.pixels[2], GBColor::On66);
    assert_eq!(tile.pixels[3], GBColor::On);

    assert_eq!(tile.pixels[4], GBColor::On);
    assert_eq!(tile.pixels[5], GBColor::On66);
    assert_eq!(tile.pixels[6], GBColor::On33);
    assert_eq!(tile.pixels[7], GBColor::Off);

    // rest of the pixels are off
    for i in 8..64 {
        assert_eq!(tile.pixels[i], GBColor::Off);
    }
}

#[test]
fn get_pixel_test() {
    let mut gpu = GPU::new();
    // write first line of tile #0 in set #0
    // pixels should be: 0 1 2 3 3 2 1 0
    gpu.write_vram(0, 0b0101_1010u8);
    gpu.write_vram(1, 0b0011_1100u8);

    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 0), GBColor::Off);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 1), GBColor::On33);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 2), GBColor::On66);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 3), GBColor::On);

    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 4), GBColor::On);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 5), GBColor::On66);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 6), GBColor::On33);
    assert_eq!(gpu.get_tile_pixel(TileSelector::Set0, 0, 7), GBColor::Off);
}
<|endoftext|>


<commit_before>use amq_protocol_types::*;
use format::field::*;
use format::frame::*;
use connection::*;
use generated::*;

impl Connection {

  {{#each specs.classes as |class| ~}}
  {{#each class.methods as |method| ~}}
  pub fn {{snake class.name}}_{{snake method.name}}(&mut self,
    _channel_id: u16{{#each method.arguments as |argument| ~}},
    {{snake argument.name}}: {{argument.type}}{{/each ~}}) {
      let method = Class::{{camel class.name}}({{snake class.name}}::Methods::{{camel method.name}} (
        {{snake class.name}}::{{camel method.name}} {
          {{#each method.arguments as |argument| ~}}
          {{snake argument.name}}: {{snake argument.name}},
          {{/each ~}}
        }
      ));

    self.send_method_frame(_channel_id, &method);
  }

  {{/each ~}}
{{/each ~}}
}

<commit_msg>generate the ChannelState enum<commit_after>use amq_protocol_types::*;
use format::field::*;
use format::frame::*;
use connection::*;
use generated::*;

#[derive(Clone,Debug,PartialEq,Eq)]
pub enum ChannelState {
  Initial,
  Connected,
  Error,
  {{#each specs.classes as |class| ~}}
  {{#each class.methods as |method| ~}}{{#if method.synchronous }}Awaiting{{camel class.name}}{{camel method.name}}Ok,
  {{/if}}{{/each ~}}
  {{/each ~}}
}

impl Connection {

  {{#each specs.classes as |class| ~}}
  {{#each class.methods as |method| ~}}
  pub fn {{snake class.name}}_{{snake method.name}}(&mut self,
    _channel_id: u16{{#each method.arguments as |argument| ~}},
    {{snake argument.name}}: {{argument.type}}{{/each ~}}) {
      let method = Class::{{camel class.name}}({{snake class.name}}::Methods::{{camel method.name}} (
        {{snake class.name}}::{{camel method.name}} {
          {{#each method.arguments as |argument| ~}}
          {{snake argument.name}}: {{snake argument.name}},
          {{/each ~}}
        }
      ));

    self.send_method_frame(_channel_id, &method);
  }

  {{/each ~}}
{{/each ~}}
}

<|endoftext|>


<commit_before>#![crate_id = "jit_macro"]
#![comment = "LibJIT Macro"]
#![crate_type = "dylib"]
#![crate_type = "rlib"]
#![feature(quote, globs, macro_registrar, managed_boxes)]
#![deny(non_uppercase_statics, missing_doc, unnecessary_parens, unrecognized_lint, unreachable_code, unnecessary_allocation, unnecessary_typecast, unnecessary_allocation, uppercase_variables, non_camel_case_types, unused_must_use)]
//! This crate provides a macro `jit_compile` which can compile a Rust type identifier
//! into its LibJIT counterpart.
//!
//! For example:
//!
//! ```rust
//! #![feature(phase)]
//! extern crate jit;
//! #[phase(syntax)]
//! extern crate jit_macro;
//! fn main() {
//! 	let ty = jit_compile!(i64);
//! 	assert_eq(ty.get_size(), 8);
//! }
//! ```
extern crate syntax;
use syntax::ext::quote::rt::ToSource;
use syntax::ast::*;
use syntax::codemap::Span;
use syntax::ext::base::*;
use syntax::ext::build::AstBuilder;
use syntax::parse::token;
use syntax::parse::token::*;
use std::iter::Peekable;
use std::slice::Items;
#[macro_registrar]
#[doc(hidden)]
pub fn macro_registrar(register: |Name, SyntaxExtension|) {
	let expander = box BasicMacroExpander { expander: jit_compile, span: None };
	register(token::intern("jit_compile"), NormalTT(expander, None))
}
fn error(e:Option<TokenTree>, tok:Token) -> Result<(), String> {
	match e {
		Some(TTTok(_, ref got)) => Err(format!("Bad syntax - got {} but expected {}", got, tok)),
		Some(TTNonterminal(_, ref got)) => Err(format!("Bad syntax - got {} but expected {}", got, tok)),
		Some(TTDelim(ref trees)) => error(Some(trees.deref().get(0).clone()), tok),
		Some(_) => Err("Bad syntax".into_string()),
		None => Err("Abrupt end".into_string())
	}
}
fn expect<'a>(_: &mut ExtCtxt, tts:&mut Peekable<&'a TokenTree, Items<'a, TokenTree>>, tok:Token) -> Result<(), String> {
	match tts.next().map(|v| v.clone()) {
		Some(TTTok(_, ref got)) if *got == tok => {
			Ok(())
		},
		Some(TTDelim(ref trees)) => {
			let curr = trees.deref().get(0).clone();
			match curr {
				TTTok(_, ref got) if *got == tok =>
					Ok(()),
				_ =>
					Err("Bad result".into_string())
			}
		},
		v => error(v, tok)
	}
}
fn jit_parse_type<'a>(cx: &mut ExtCtxt, tts:&mut Peekable<&'a TokenTree, Items<'a, TokenTree>>) -> Result<P<Expr>, String> {
	let val:Option<&TokenTree> = tts.peek().map(|v|*v);
	match val {
		Some(ref val) => {
			match **val {
				TTDelim(ref toks) => {
					match *toks.get(0) {
						TTTok(span, LPAREN) => {
							let toks = toks.slice(1, toks.len() - 1);
							if toks.len() == 0 {
								Ok(quote_expr!(cx, ::jit::Types::get_void()))
							} else {
								let mut arg_types : Vec<@Expr> = Vec::new();
								{
									let mut tts = toks.iter().peekable();
									loop {
										let parsed = try!(jit_parse_type(cx, &mut tts));
										// &*parsed
										let derefed = cx.expr_deref(span, parsed);
										arg_types.push((&mut *cx).expr_addr_of(span, derefed));
										match tts.next() {
											Some(v) =>
												match *v {
													TTTok(_, COMMA) => {
														continue;
													},
													_ => return Err("Unexpected token in function decl".into_string())
												},
											None => break
										}
									}
								}
								tts.next();
								try!(expect(cx, tts, RARROW));
								let ret = try!(jit_parse_type(cx, tts));
								let arg_types_ex = cx.expr(ret.span, ExprVec(arg_types));
								let func = quote_expr!(&mut*cx, ::jit::Type::create_signature);
								let cdecl = quote_expr!(&mut*cx, ::jit::CDECL);
								let arg_types_ex = cx.expr_mut_addr_of(span, arg_types_ex);
								let call = cx.expr_call(span, func, vec!(cdecl, ret, arg_types_ex));
								Ok(call)

							}
						},
						_ => Err("Expected bracker".into_string())
					}
				},
				TTTok(_, IDENT(ident, _)) => {
					let ident = ident.to_source();
					let res = match ident.as_slice() {
						"void" => Ok(quote_expr!(cx, ::jit::Types::get_void())),
						"int" | "i32" => Ok(quote_expr!(cx, ::jit::Types::get_int())),
						"uint" | "u32" => Ok(quote_expr!(cx, ::jit::Types::get_uint())),
						"i64" => Ok(quote_expr!(cx, ::jit::Types::get_long())),
						"u64" => Ok(quote_expr!(cx, ::jit::Types::get_ulong())),
						"char" => Ok(quote_expr!(cx, ::jit::Types::get_char())),
						"bool" => Ok(quote_expr!(cx, ::jit::Types::get_bool())),
						"f64" => Ok(quote_expr!(cx, ::jit::Types::get_float64())),
						"f32" => Ok(quote_expr!(cx, ::jit::Types::get_float32())),
						"Vec" => Ok(quote_expr!(cx, ::jit::Types::get_vec())),
						id => Err(format!("Unexpected identifier {}", id))
					};
					if res.is_ok() {
						tts.next();
					}
					res
				},
				TTTok(span, BINOP(STAR)) => {
					tts.next();
					let func = quote_expr!(&mut*cx, ::jit::Type::create_pointer);
					let parsed_type = try!(jit_parse_type(&mut*cx, tts));
					let wv = cx.expr_addr_of(span, parsed_type);
					Ok(cx.expr_call(span, func, vec!(wv)))
				},
				TTTok(_, DOLLAR) => {
					tts.next();
					match tts.next() {
						Some(ref tks) => {
							match **tks {
								TTTok(span, IDENT(ident, _)) => {
									Ok(cx.expr_ident(span, ident))
								}
								_ => Err("Expected next".into_string())
							}
						},
						None => Err("Abrupt end".into_string())
					}
				},
				ref token => {
					try!(error(Some(token.clone()), DOLLAR));
					Err("...".into_string())
				}
			}
		},
		None =>
			Err("Not a type".into_string())
	}
}
fn jit_compile(cx: &mut ExtCtxt, sp: Span, tts: &[TokenTree]) -> Box<MacResult> {
	let mut iter = tts.iter().peekable();
	MacExpr::new(match jit_parse_type(cx, &mut iter) {
		Ok(v) => v,
		Err(e) => {
			cx.span_err(sp, e.as_slice());
			quote_expr!(cx, fail!("Invalid"))
		}
	})
}<commit_msg>Add sentence to docs<commit_after>#![crate_id = "jit_macro"]
#![comment = "LibJIT Macro"]
#![crate_type = "dylib"]
#![crate_type = "rlib"]
#![feature(quote, globs, macro_registrar, managed_boxes)]
#![deny(non_uppercase_statics, missing_doc, unnecessary_parens, unrecognized_lint, unreachable_code, unnecessary_allocation, unnecessary_typecast, unnecessary_allocation, uppercase_variables, non_camel_case_types, unused_must_use)]
//! This crate provides a macro `jit_compile` which can compile a Rust type
//! into its LibJIT counterpart. Its currently a bit glitchy when it comes
//! to function signatures but that is being worked on.
//!
//! For example:
//!
//! ```rust
//! #![feature(phase)]
//! extern crate jit;
//! #[phase(syntax)]
//! extern crate jit_macro;
//! fn main() {
//! 	let ty = jit_compile!(i64);
//! 	assert_eq(ty.get_size(), 8);
//! }
//! ```
extern crate syntax;
use syntax::ext::quote::rt::ToSource;
use syntax::ast::*;
use syntax::codemap::Span;
use syntax::ext::base::*;
use syntax::ext::build::AstBuilder;
use syntax::parse::token;
use syntax::parse::token::*;
use std::iter::Peekable;
use std::slice::Items;
#[macro_registrar]
#[doc(hidden)]
pub fn macro_registrar(register: |Name, SyntaxExtension|) {
	let expander = box BasicMacroExpander { expander: jit_compile, span: None };
	register(token::intern("jit_compile"), NormalTT(expander, None))
}
fn error(e:Option<TokenTree>, tok:Token) -> Result<(), String> {
	match e {
		Some(TTTok(_, ref got)) => Err(format!("Bad syntax - got {} but expected {}", got, tok)),
		Some(TTNonterminal(_, ref got)) => Err(format!("Bad syntax - got {} but expected {}", got, tok)),
		Some(TTDelim(ref trees)) => error(Some(trees.deref().get(0).clone()), tok),
		Some(_) => Err("Bad syntax".into_string()),
		None => Err("Abrupt end".into_string())
	}
}
fn expect<'a>(_: &mut ExtCtxt, tts:&mut Peekable<&'a TokenTree, Items<'a, TokenTree>>, tok:Token) -> Result<(), String> {
	match tts.next().map(|v| v.clone()) {
		Some(TTTok(_, ref got)) if *got == tok => {
			Ok(())
		},
		Some(TTDelim(ref trees)) => {
			let curr = trees.deref().get(0).clone();
			match curr {
				TTTok(_, ref got) if *got == tok =>
					Ok(()),
				_ =>
					Err("Bad result".into_string())
			}
		},
		v => error(v, tok)
	}
}
fn jit_parse_type<'a>(cx: &mut ExtCtxt, tts:&mut Peekable<&'a TokenTree, Items<'a, TokenTree>>) -> Result<P<Expr>, String> {
	let val:Option<&TokenTree> = tts.peek().map(|v|*v);
	match val {
		Some(ref val) => {
			match **val {
				TTDelim(ref toks) => {
					match *toks.get(0) {
						TTTok(span, LPAREN) => {
							let toks = toks.slice(1, toks.len() - 1);
							if toks.len() == 0 {
								Ok(quote_expr!(cx, ::jit::Types::get_void()))
							} else {
								let mut arg_types : Vec<@Expr> = Vec::new();
								{
									let mut tts = toks.iter().peekable();
									loop {
										let parsed = try!(jit_parse_type(cx, &mut tts));
										// &*parsed
										let derefed = cx.expr_deref(span, parsed);
										arg_types.push((&mut *cx).expr_addr_of(span, derefed));
										match tts.next() {
											Some(v) =>
												match *v {
													TTTok(_, COMMA) => {
														continue;
													},
													_ => return Err("Unexpected token in function decl".into_string())
												},
											None => break
										}
									}
								}
								tts.next();
								try!(expect(cx, tts, RARROW));
								let ret = try!(jit_parse_type(cx, tts));
								let arg_types_ex = cx.expr(ret.span, ExprVec(arg_types));
								let func = quote_expr!(&mut*cx, ::jit::Type::create_signature);
								let cdecl = quote_expr!(&mut*cx, ::jit::CDECL);
								let arg_types_ex = cx.expr_mut_addr_of(span, arg_types_ex);
								let call = cx.expr_call(span, func, vec!(cdecl, ret, arg_types_ex));
								Ok(call)

							}
						},
						_ => Err("Expected bracker".into_string())
					}
				},
				TTTok(_, IDENT(ident, _)) => {
					let ident = ident.to_source();
					let res = match ident.as_slice() {
						"void" => Ok(quote_expr!(cx, ::jit::Types::get_void())),
						"int" | "i32" => Ok(quote_expr!(cx, ::jit::Types::get_int())),
						"uint" | "u32" => Ok(quote_expr!(cx, ::jit::Types::get_uint())),
						"i64" => Ok(quote_expr!(cx, ::jit::Types::get_long())),
						"u64" => Ok(quote_expr!(cx, ::jit::Types::get_ulong())),
						"char" => Ok(quote_expr!(cx, ::jit::Types::get_char())),
						"bool" => Ok(quote_expr!(cx, ::jit::Types::get_bool())),
						"f64" => Ok(quote_expr!(cx, ::jit::Types::get_float64())),
						"f32" => Ok(quote_expr!(cx, ::jit::Types::get_float32())),
						"Vec" => Ok(quote_expr!(cx, ::jit::Types::get_vec())),
						id => Err(format!("Unexpected identifier {}", id))
					};
					if res.is_ok() {
						tts.next();
					}
					res
				},
				TTTok(span, BINOP(STAR)) => {
					tts.next();
					let func = quote_expr!(&mut*cx, ::jit::Type::create_pointer);
					let parsed_type = try!(jit_parse_type(&mut*cx, tts));
					let wv = cx.expr_addr_of(span, parsed_type);
					Ok(cx.expr_call(span, func, vec!(wv)))
				},
				TTTok(_, DOLLAR) => {
					tts.next();
					match tts.next() {
						Some(ref tks) => {
							match **tks {
								TTTok(span, IDENT(ident, _)) => {
									Ok(cx.expr_ident(span, ident))
								}
								_ => Err("Expected next".into_string())
							}
						},
						None => Err("Abrupt end".into_string())
					}
				},
				ref token => {
					try!(error(Some(token.clone()), DOLLAR));
					Err("...".into_string())
				}
			}
		},
		None =>
			Err("Not a type".into_string())
	}
}
fn jit_compile(cx: &mut ExtCtxt, sp: Span, tts: &[TokenTree]) -> Box<MacResult> {
	let mut iter = tts.iter().peekable();
	MacExpr::new(match jit_parse_type(cx, &mut iter) {
		Ok(v) => v,
		Err(e) => {
			cx.span_err(sp, e.as_slice());
			quote_expr!(cx, fail!("Invalid"))
		}
	})
}<|endoftext|>