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#![feature(alloc_system)]
extern crate alloc_system;
extern crate num;
extern crate fnv;
#[macro_use]
extern crate nock;
use std::rc::Rc;
use std::collections::HashMap;
use nock::{Nock, Noun, NockError, NockResult, Shape, FromNoun};
use jet::Jet;
mod jet;
mod jets;
pub struct VM {
jets: HashMap<Noun, jet::Jet>,
}
impl Nock for VM {
fn call(&mut self, subject: &Noun, formula: &Noun) -> Option<NockResult> {
if let Some(jet) = self.jets.get_mut(formula) {
jet.calls += 1;
if let Some(f) = jet.jet {
return Some(f(subject));
}
}
None
}
fn hint(&mut self, subject: &Noun, hint: &Noun, c: &Noun) -> Result<(), NockError> {
let (id, clue) = match hint.get() {
Shape::Cell(ref p, ref q) => {
(p.clone(), try!(self.nock_on((*subject).clone(), (*q).clone())))
}
Shape::Atom(_) => (hint, Noun::from(0u32)),
};
if String::from_noun(id).unwrap() == "fast" {
let core = try!(self.nock_on((*subject).clone(), (*c).clone()));
if let Ok((name, axis, hooks)) = parse_fast_clue(&clue) {
if let Shape::Cell(ref battery, _) = core.get() {
if !self.jets.contains_key(battery) {
let jet = Jet::new(name, (*battery).clone(), axis, hooks);
self.jets.insert((*battery).clone(), jet);
}
} else {
return Err(NockError(format!("hint")));
}
} else {
}
}
Ok(())
}
}
impl VM {
pub fn new() -> VM {
VM { jets: HashMap::new() }
}
pub fn print_status(&self) {
let mut total_count = 0;
let mut jets: Vec<&Jet> = self.jets.iter().map(|(_, x)| x).collect();
jets.sort_by(|a, b| b.calls.cmp(&a.calls));
for jet in jets.iter() {
if jet.calls < 100 || (jet.calls as f32) / (total_count as f32) < 1e-6 {
println!(" ...");
break;
}
println!("{}{} called {} times",
if jet.jet.is_some() {
'*'
} else {
' '
},
jet.name,
jet.calls);
total_count += jet.calls;
}
}
}
fn parse_fast_clue(clue: &Noun) -> Result<(String, u32, Vec<(String, Noun)>), NockError> {
if let Some((ref name, ref axis_formula, ref hooks)) = clue.get_122() {
let chum = try!(String::from_noun(name).map_err(|_| NockError(format!("hint"))));
let axis = if let Shape::Cell(ref a, ref b) = axis_formula.get() {
if let (Some(1), Some(0)) = (a.as_u32(), b.as_u32()) {
0
} else if let (Some(0), Some(axis)) = (a.as_u32(), b.as_u32()) {
axis
} else {
return Err(NockError(format!("hint")));
}
} else {
return Err(NockError(format!("hint")));
};
let hooks: Vec<(String, Noun)> = try!(FromNoun::from_noun(hooks)
.map_err(|_| NockError(format!("hint"))));
Ok((chum, axis, hooks))
} else {
Err(NockError(format!("hint")))
}
}
pub fn symhash(noun: &Noun) -> String {
fn proquint(buf: &mut String, mut b: u16) {
const C: [char; 16] = ['b', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'r', 's',
't', 'v', 'z'];
const V: [char; 4] = ['a', 'i', 'o', 'u'];
buf.push(C[(b % 16) as usize]);
b >>= 4;
buf.push(V[(b % 4) as usize]);
b >>= 2;
buf.push(C[(b % 16) as usize]);
b >>= 4;
buf.push(V[(b % 4) as usize]);
b >>= 2;
buf.push(C[(b % 16) as usize]);
}
let mut hash = noun.mug();
let mut ret = String::new();
proquint(&mut ret, (hash % 0xFFFF) as u16);
hash >>= 16;
ret.push('-');
proquint(&mut ret, (hash % 0xFFFF) as u16);
ret
}
pub fn unpack_pill(mut buf: Vec<u8>) -> jet::JetResult<Noun> {
while buf.len() % 4 != 0 {
buf.push(0);
}
jets::cue(Rc::new(buf))
}
#[cfg(test)]
mod test {
use nock::Noun;
#[test]
fn test_read_pill() {
use super::unpack_pill;
let noun: Noun = "[18.446.744.073.709.551.616 8 [1 0] 8 [1 6 [5 [0 7] 4 0 6] [0 6] 9 2 [0 \
2] [4 0 6] 0 7] 9 2 0 1]"
.parse()
.expect("Nock parse error");
let pill: &[u8] = &[0x01, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06,
0xc1, 0x62, 0x83, 0x60, 0x71, 0xd8, 0x85, 0x5b, 0xe2, 0x87, 0x99,
0xd8, 0x0d, 0xc1, 0x1a, 0x24, 0x43, 0x96, 0xc8, 0x86, 0x10, 0x1d,
0xc2, 0x32, 0x48, 0x86, 0x4c, 0x06];
let unpacked = unpack_pill(pill.to_vec()).expect("Pill unpack failed");
assert_eq!(noun, unpacked);
}
#[test]
fn test_cue_stack() {
use super::unpack_pill;
let noun: Noun = "[1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 \
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]"
.parse()
.expect("Nock parse error");
let pill: &[u8] = "qffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\
fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\
fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffj"
.as_bytes();
let unpacked = unpack_pill(pill.to_vec()).expect("Pill unpack failed");
assert_eq!(noun, unpacked);
}
}