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Implement raw constraints for Bit

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This commit is contained in:
Sean Bowe
2016-01-24 01:42:29 -07:00
parent 506ef75e3c
commit ececc2b60b
2 changed files with 77 additions and 37 deletions
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36
src/variable.rs
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@@ -1,7 +1,6 @@
use tinysnark::FieldT;
use std::cell::Cell;
use std::rc::Rc;
use std::fmt;
use std::collections::BTreeMap;
pub type WitnessMap = BTreeMap<usize, Vec<(Vec<usize>, Vec<usize>, Rc<Fn(&mut VariableView) + 'static>)>>;
@@ -41,33 +40,7 @@ pub fn witness_field_elements(vars: &mut [FieldT], witness_map: &WitnessMap) {
}
#[derive(Clone)]
pub enum Constraint {
Bitness(Rc<Cell<usize>>),
And(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
Nand(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
Xor(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
Xnor(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
MaterialNonimplication(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
MaterialImplication(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
Nor(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>),
Or(Rc<Cell<usize>>, Rc<Cell<usize>>, Rc<Cell<usize>>)
}
impl fmt::Debug for Constraint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", match *self {
Constraint::Bitness(ref b) => format!("bitness: {}", b.get()),
Constraint::And(ref a, ref b, ref c) => format!("{} = {} AND {}", c.get(), a.get(), b.get()),
Constraint::Nand(ref a, ref b, ref c) => format!("{} = {} NAND {}", c.get(), a.get(), b.get()),
Constraint::Xor(ref a, ref b, ref c) => format!("{} = {} XOR {}", c.get(), a.get(), b.get()),
Constraint::Xnor(ref a, ref b, ref c) => format!("{} = {} XNOR {}", c.get(), a.get(), b.get()),
Constraint::MaterialNonimplication(ref a, ref b, ref c) => format!("{} = {} ↛ {}", c.get(), a.get(), b.get()),
Constraint::MaterialImplication(ref a, ref b, ref c) => format!("{} = {} <-> {}", c.get(), a.get(), b.get()),
Constraint::Nor(ref a, ref b, ref c) => format!("{} = {} NOR {}", c.get(), a.get(), b.get()),
Constraint::Or(ref a, ref b, ref c) => format!("{} = {} OR {}", c.get(), a.get(), b.get())
})
}
}
pub struct Constraint(pub Vec<(FieldT, Var)>, pub Vec<(FieldT, Var)>, pub Vec<(FieldT, Var)>);
struct Gadget {
inputs: Vec<Var>,
@@ -122,6 +95,13 @@ impl Var {
}
}
pub fn one() -> Var {
Var {
index: Rc::new(Cell::new(0)),
gadget: None
}
}
// make this not public or unsafe too
pub fn index(&self) -> Rc<Cell<usize>> {
self.index.clone()