1526 lines
42 KiB
Rust
1526 lines
42 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use core::container::{Container, Mutable, Set};
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use core::ops;
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use core::prelude::*;
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use core::uint;
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use core::vec::from_elem;
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use core::vec;
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struct SmallBitv {
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/// only the lowest nbits of this value are used. the rest is undefined.
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bits: uint
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}
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/// a mask that has a 1 for each defined bit in a small_bitv, assuming n bits
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#[inline(always)]
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fn small_mask(nbits: uint) -> uint {
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(1 << nbits) - 1
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}
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pub impl SmallBitv {
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fn new(bits: uint) -> SmallBitv {
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SmallBitv {bits: bits}
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}
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#[inline(always)]
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fn bits_op(&mut self, right_bits: uint, nbits: uint,
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f: &fn(uint, uint) -> uint) -> bool {
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let mask = small_mask(nbits);
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let old_b: uint = self.bits;
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let new_b = f(old_b, right_bits);
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self.bits = new_b;
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mask & old_b != mask & new_b
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}
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#[inline(always)]
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fn union(&mut self, s: &SmallBitv, nbits: uint) -> bool {
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self.bits_op(s.bits, nbits, |u1, u2| u1 | u2)
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}
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#[inline(always)]
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fn intersect(&mut self, s: &SmallBitv, nbits: uint) -> bool {
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self.bits_op(s.bits, nbits, |u1, u2| u1 & u2)
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}
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#[inline(always)]
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fn become(&mut self, s: &SmallBitv, nbits: uint) -> bool {
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self.bits_op(s.bits, nbits, |_u1, u2| u2)
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}
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#[inline(always)]
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fn difference(&mut self, s: &SmallBitv, nbits: uint) -> bool {
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self.bits_op(s.bits, nbits, |u1, u2| u1 & !u2)
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}
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#[inline(always)]
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fn get(&self, i: uint) -> bool {
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(self.bits & (1 << i)) != 0
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}
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#[inline(always)]
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fn set(&mut self, i: uint, x: bool) {
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if x {
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self.bits |= 1<<i;
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}
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else {
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self.bits &= !(1<<i as uint);
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}
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}
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#[inline(always)]
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fn equals(&self, b: &SmallBitv, nbits: uint) -> bool {
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let mask = small_mask(nbits);
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mask & self.bits == mask & b.bits
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}
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#[inline(always)]
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fn clear(&mut self) { self.bits = 0; }
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#[inline(always)]
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fn set_all(&mut self) { self.bits = !0; }
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#[inline(always)]
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fn is_true(&self, nbits: uint) -> bool {
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small_mask(nbits) & !self.bits == 0
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}
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#[inline(always)]
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fn is_false(&self, nbits: uint) -> bool {
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small_mask(nbits) & self.bits == 0
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}
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#[inline(always)]
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fn invert(&mut self) { self.bits = !self.bits; }
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}
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struct BigBitv {
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storage: ~[uint]
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}
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/**
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* a mask that has a 1 for each defined bit in the nth element of a big_bitv,
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* assuming n bits.
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*/
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#[inline(always)]
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fn big_mask(nbits: uint, elem: uint) -> uint {
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let rmd = nbits % uint::bits;
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let nelems = nbits/uint::bits + if rmd == 0 {0} else {1};
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if elem < nelems - 1 || rmd == 0 {
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!0
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} else {
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(1 << rmd) - 1
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}
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}
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pub impl BigBitv {
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fn new(storage: ~[uint]) -> BigBitv {
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BigBitv {storage: storage}
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}
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#[inline(always)]
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fn process(&mut self, b: &BigBitv, nbits: uint,
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op: &fn(uint, uint) -> uint) -> bool {
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let len = b.storage.len();
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assert!((self.storage.len() == len));
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let mut changed = false;
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for uint::range(0, len) |i| {
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let mask = big_mask(nbits, i);
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let w0 = self.storage[i] & mask;
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let w1 = b.storage[i] & mask;
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let w = op(w0, w1) & mask;
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if w0 != w {
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changed = true;
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self.storage[i] = w;
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}
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}
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changed
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}
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#[inline(always)]
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fn each_storage(&mut self, op: &fn(v: &mut uint) -> bool) {
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for uint::range(0, self.storage.len()) |i| {
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let mut w = self.storage[i];
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let b = op(&mut w);
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self.storage[i] = w;
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if !b { break; }
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}
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}
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#[inline(always)]
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fn invert(&mut self) { for self.each_storage |w| { *w = !*w } }
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#[inline(always)]
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fn union(&mut self, b: &BigBitv, nbits: uint) -> bool {
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self.process(b, nbits, |w1, w2| w1 | w2)
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}
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#[inline(always)]
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fn intersect(&mut self, b: &BigBitv, nbits: uint) -> bool {
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self.process(b, nbits, |w1, w2| w1 & w2)
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}
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#[inline(always)]
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fn become(&mut self, b: &BigBitv, nbits: uint) -> bool {
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self.process(b, nbits, |_, w| w)
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}
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#[inline(always)]
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fn difference(&mut self, b: &BigBitv, nbits: uint) -> bool {
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self.process(b, nbits, |w1, w2| w1 & !w2)
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}
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#[inline(always)]
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fn get(&self, i: uint) -> bool {
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let w = i / uint::bits;
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let b = i % uint::bits;
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let x = 1 & self.storage[w] >> b;
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x == 1
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}
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#[inline(always)]
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fn set(&mut self, i: uint, x: bool) {
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let w = i / uint::bits;
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let b = i % uint::bits;
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let flag = 1 << b;
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self.storage[w] = if x { self.storage[w] | flag }
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else { self.storage[w] & !flag };
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}
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#[inline(always)]
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fn equals(&self, b: &BigBitv, nbits: uint) -> bool {
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let len = b.storage.len();
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for uint::iterate(0, len) |i| {
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let mask = big_mask(nbits, i);
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if mask & self.storage[i] != mask & b.storage[i] {
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return false;
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}
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}
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}
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}
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enum BitvVariant { Big(~BigBitv), Small(~SmallBitv) }
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enum Op {Union, Intersect, Assign, Difference}
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// The bitvector type
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pub struct Bitv {
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rep: BitvVariant,
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nbits: uint
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}
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priv impl Bitv {
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fn die(&self) -> ! {
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fail!(~"Tried to do operation on bit vectors with different sizes");
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}
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#[inline(always)]
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fn do_op(&mut self, op: Op, other: &Bitv) -> bool {
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if self.nbits != other.nbits {
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self.die();
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}
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match self.rep {
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Small(ref mut s) => match other.rep {
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Small(ref s1) => match op {
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Union => s.union(*s1, self.nbits),
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Intersect => s.intersect(*s1, self.nbits),
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Assign => s.become(*s1, self.nbits),
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Difference => s.difference(*s1, self.nbits)
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},
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Big(_) => self.die()
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},
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Big(ref mut s) => match other.rep {
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Small(_) => self.die(),
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Big(ref s1) => match op {
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Union => s.union(*s1, self.nbits),
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Intersect => s.intersect(*s1, self.nbits),
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Assign => s.become(*s1, self.nbits),
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Difference => s.difference(*s1, self.nbits)
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}
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}
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}
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}
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}
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pub impl Bitv {
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fn new(nbits: uint, init: bool) -> Bitv {
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let rep = if nbits <= uint::bits {
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Small(~SmallBitv::new(if init {!0} else {0}))
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}
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else {
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let nelems = nbits/uint::bits +
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if nbits % uint::bits == 0 {0} else {1};
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let elem = if init {!0} else {0};
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let s = from_elem(nelems, elem);
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Big(~BigBitv::new(s))
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};
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Bitv {rep: rep, nbits: nbits}
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}
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/**
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* Calculates the union of two bitvectors
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*
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* Sets `self` to the union of `self` and `v1`. Both bitvectors must be
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* the same length. Returns 'true' if `self` changed.
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*/
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#[inline(always)]
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fn union(&mut self, v1: &Bitv) -> bool { self.do_op(Union, v1) }
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/**
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* Calculates the intersection of two bitvectors
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*
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* Sets `self` to the intersection of `self` and `v1`. Both bitvectors
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* must be the same length. Returns 'true' if `self` changed.
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*/
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#[inline(always)]
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fn intersect(&mut self, v1: &Bitv) -> bool { self.do_op(Intersect, v1) }
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/**
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* Assigns the value of `v1` to `self`
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*
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* Both bitvectors must be the same length. Returns `true` if `self` was
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* changed
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*/
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#[inline(always)]
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fn assign(&mut self, v: &Bitv) -> bool { self.do_op(Assign, v) }
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/// Retrieve the value at index `i`
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#[inline(always)]
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fn get(&self, i: uint) -> bool {
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assert!((i < self.nbits));
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match self.rep {
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Big(ref b) => b.get(i),
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Small(ref s) => s.get(i)
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}
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}
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/**
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* Set the value of a bit at a given index
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*
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* `i` must be less than the length of the bitvector.
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*/
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#[inline(always)]
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fn set(&mut self, i: uint, x: bool) {
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assert!((i < self.nbits));
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match self.rep {
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Big(ref mut b) => b.set(i, x),
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Small(ref mut s) => s.set(i, x)
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}
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}
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/**
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* Compares two bitvectors
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*
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* Both bitvectors must be the same length. Returns `true` if both
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* bitvectors contain identical elements.
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*/
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#[inline(always)]
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fn equal(&self, v1: &Bitv) -> bool {
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if self.nbits != v1.nbits { return false; }
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match self.rep {
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Small(ref b) => match v1.rep {
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Small(ref b1) => b.equals(*b1, self.nbits),
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_ => false
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},
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Big(ref s) => match v1.rep {
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Big(ref s1) => s.equals(*s1, self.nbits),
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Small(_) => return false
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}
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}
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}
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/// Set all bits to 0
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#[inline(always)]
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fn clear(&mut self) {
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match self.rep {
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Small(ref mut b) => b.clear(),
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Big(ref mut s) => for s.each_storage() |w| { *w = 0u }
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}
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}
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/// Set all bits to 1
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#[inline(always)]
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fn set_all(&mut self) {
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match self.rep {
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Small(ref mut b) => b.set_all(),
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Big(ref mut s) => for s.each_storage() |w| { *w = !0u } }
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}
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/// Invert all bits
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#[inline(always)]
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fn invert(&mut self) {
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match self.rep {
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Small(ref mut b) => b.invert(),
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Big(ref mut s) => for s.each_storage() |w| { *w = !*w } }
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}
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/**
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* Calculate the difference between two bitvectors
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*
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* Sets each element of `v0` to the value of that element minus the
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* element of `v1` at the same index. Both bitvectors must be the same
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* length.
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*
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* Returns `true` if `v0` was changed.
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*/
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#[inline(always)]
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fn difference(&mut self, v: &Bitv) -> bool { self.do_op(Difference, v) }
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/// Returns true if all bits are 1
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#[inline(always)]
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fn is_true(&self) -> bool {
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match self.rep {
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Small(ref b) => b.is_true(self.nbits),
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_ => {
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for self.each() |i| { if !i { return false; } }
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true
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}
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}
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}
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#[inline(always)]
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fn each(&self, f: &fn(bool) -> bool) {
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let mut i = 0;
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while i < self.nbits {
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if !f(self.get(i)) { break; }
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i += 1;
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}
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}
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/// Returns true if all bits are 0
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fn is_false(&self) -> bool {
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match self.rep {
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Small(ref b) => b.is_false(self.nbits),
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Big(_) => {
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for self.each() |i| { if i { return false; } }
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true
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}
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}
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}
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fn init_to_vec(&self, i: uint) -> uint {
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return if self.get(i) { 1 } else { 0 };
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}
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/**
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* Converts `self` to a vector of uint with the same length.
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*
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* Each uint in the resulting vector has either value 0u or 1u.
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*/
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fn to_vec(&self) -> ~[uint] {
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vec::from_fn(self.nbits, |x| self.init_to_vec(x))
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}
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/**
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* Organise the bits into bytes, such that the first bit in the
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* bitv becomes the high-order bit of the first byte. If the
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* size of the bitv is not a multiple of 8 then trailing bits
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* will be filled-in with false/0
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*/
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fn to_bytes(&self) -> ~[u8] {
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fn bit (bitv: &Bitv, byte: uint, bit: uint) -> u8 {
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let offset = byte * 8 + bit;
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if offset >= bitv.nbits {
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0
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} else {
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bitv[offset] as u8 << (7 - bit)
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}
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}
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let len = self.nbits/8 +
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if self.nbits % 8 == 0 { 0 } else { 1 };
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vec::from_fn(len, |i|
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bit(self, i, 0) |
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bit(self, i, 1) |
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bit(self, i, 2) |
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bit(self, i, 3) |
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bit(self, i, 4) |
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bit(self, i, 5) |
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bit(self, i, 6) |
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bit(self, i, 7)
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)
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}
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/**
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* Transform self into a [bool] by turning each bit into a bool
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*/
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fn to_bools(&self) -> ~[bool] {
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vec::from_fn(self.nbits, |i| self[i])
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}
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/**
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* Converts `self` to a string.
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*
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* The resulting string has the same length as `self`, and each
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* character is either '0' or '1'.
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*/
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fn to_str(&self) -> ~str {
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let mut rs = ~"";
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for self.each() |i| { if i { rs += ~"1"; } else { rs += ~"0"; } };
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rs
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}
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/**
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* Compare a bitvector to a vector of uint
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*
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* The uint vector is expected to only contain the values 0u and 1u. Both
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* the bitvector and vector must have the same length
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*/
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fn eq_vec(&self, v: ~[uint]) -> bool {
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assert!(self.nbits == v.len());
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let mut i = 0;
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while i < self.nbits {
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let w0 = self.get(i);
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let w1 = v[i];
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if !w0 && w1 != 0u || w0 && w1 == 0u { return false; }
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i = i + 1;
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}
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true
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}
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fn ones(&self, f: &fn(uint) -> bool) {
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for uint::range(0, self.nbits) |i| {
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if self.get(i) {
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if !f(i) { break }
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}
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}
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}
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}
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|
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impl Clone for Bitv {
|
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/// Makes a copy of a bitvector
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#[inline(always)]
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fn clone(&self) -> Bitv {
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match self.rep {
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Small(ref b) => {
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Bitv{nbits: self.nbits, rep: Small(~SmallBitv{bits: b.bits})}
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}
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Big(ref b) => {
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let mut st = from_elem(self.nbits / uint::bits + 1, 0);
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let len = st.len();
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for uint::range(0, len) |i| { st[i] = b.storage[i]; };
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Bitv{nbits: self.nbits, rep: Big(~BigBitv{storage: st})}
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}
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}
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}
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}
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|
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/**
|
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* Transform a byte-vector into a bitv. Each byte becomes 8 bits,
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* with the most significant bits of each byte coming first. Each
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* bit becomes true if equal to 1 or false if equal to 0.
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*/
|
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pub fn from_bytes(bytes: &[u8]) -> Bitv {
|
|
from_fn(bytes.len() * 8, |i| {
|
|
let b = bytes[i / 8] as uint;
|
|
let offset = i % 8;
|
|
b >> (7 - offset) & 1 == 1
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Transform a [bool] into a bitv by converting each bool into a bit.
|
|
*/
|
|
pub fn from_bools(bools: &[bool]) -> Bitv {
|
|
from_fn(bools.len(), |i| bools[i])
|
|
}
|
|
|
|
/**
|
|
* Create a bitv of the specified length where the value at each
|
|
* index is f(index).
|
|
*/
|
|
pub fn from_fn(len: uint, f: &fn(index: uint) -> bool) -> Bitv {
|
|
let mut bitv = Bitv::new(len, false);
|
|
for uint::range(0, len) |i| {
|
|
bitv.set(i, f(i));
|
|
}
|
|
bitv
|
|
}
|
|
|
|
impl ops::Index<uint,bool> for Bitv {
|
|
fn index(&self, i: &uint) -> bool {
|
|
self.get(*i)
|
|
}
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn iterate_bits(base: uint, bits: uint, f: &fn(uint) -> bool) -> bool {
|
|
if bits == 0 {
|
|
return true;
|
|
}
|
|
for uint::range(0, uint::bits) |i| {
|
|
if bits & (1 << i) != 0 {
|
|
if !f(base + i) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// An implementation of a set using a bit vector as an underlying
|
|
/// representation for holding numerical elements.
|
|
///
|
|
/// It should also be noted that the amount of storage necessary for holding a
|
|
/// set of objects is proportional to the maximum of the objects when viewed
|
|
/// as a uint.
|
|
pub struct BitvSet {
|
|
priv size: uint,
|
|
|
|
// In theory this is a Bitv instead of always a BigBitv, but knowing that
|
|
// there's an array of storage makes our lives a whole lot easier when
|
|
// performing union/intersection/etc operations
|
|
priv bitv: BigBitv
|
|
}
|
|
|
|
pub impl BitvSet {
|
|
/// Creates a new bit vector set with initially no contents
|
|
fn new() -> BitvSet {
|
|
BitvSet{ size: 0, bitv: BigBitv::new(~[0]) }
|
|
}
|
|
|
|
/// Creates a new bit vector set from the given bit vector
|
|
fn from_bitv(bitv: Bitv) -> BitvSet {
|
|
let mut size = 0;
|
|
for bitv.ones |_| {
|
|
size += 1;
|
|
}
|
|
let Bitv{rep, _} = bitv;
|
|
match rep {
|
|
Big(~b) => BitvSet{ size: size, bitv: b },
|
|
Small(~SmallBitv{bits}) =>
|
|
BitvSet{ size: size, bitv: BigBitv{ storage: ~[bits] } },
|
|
}
|
|
}
|
|
|
|
/// Returns the capacity in bits for this bit vector. Inserting any
|
|
/// element less than this amount will not trigger a resizing.
|
|
fn capacity(&self) -> uint { self.bitv.storage.len() * uint::bits }
|
|
|
|
/// Consumes this set to return the underlying bit vector
|
|
fn unwrap(self) -> Bitv {
|
|
let cap = self.capacity();
|
|
let BitvSet{bitv, _} = self;
|
|
return Bitv{ nbits:cap, rep: Big(~bitv) };
|
|
}
|
|
|
|
#[inline(always)]
|
|
priv fn other_op(&mut self, other: &BitvSet, f: &fn(uint, uint) -> uint) {
|
|
fn nbits(mut w: uint) -> uint {
|
|
let mut bits = 0;
|
|
for uint::bits.times {
|
|
if w == 0 {
|
|
break;
|
|
}
|
|
bits += w & 1;
|
|
w >>= 1;
|
|
}
|
|
return bits;
|
|
}
|
|
if self.capacity() < other.capacity() {
|
|
self.bitv.storage.grow(other.capacity() / uint::bits, &0);
|
|
}
|
|
for other.bitv.storage.eachi |i, &w| {
|
|
let old = self.bitv.storage[i];
|
|
let new = f(old, w);
|
|
self.bitv.storage[i] = new;
|
|
self.size += nbits(new) - nbits(old);
|
|
}
|
|
}
|
|
|
|
/// Union in-place with the specified other bit vector
|
|
fn union_with(&mut self, other: &BitvSet) {
|
|
self.other_op(other, |w1, w2| w1 | w2);
|
|
}
|
|
|
|
/// Intersect in-place with the specified other bit vector
|
|
fn intersect_with(&mut self, other: &BitvSet) {
|
|
self.other_op(other, |w1, w2| w1 & w2);
|
|
}
|
|
|
|
/// Difference in-place with the specified other bit vector
|
|
fn difference_with(&mut self, other: &BitvSet) {
|
|
self.other_op(other, |w1, w2| w1 & !w2);
|
|
}
|
|
|
|
/// Symmetric difference in-place with the specified other bit vector
|
|
fn symmetric_difference_with(&mut self, other: &BitvSet) {
|
|
self.other_op(other, |w1, w2| w1 ^ w2);
|
|
}
|
|
}
|
|
|
|
impl BaseIter<uint> for BitvSet {
|
|
fn size_hint(&self) -> Option<uint> { Some(self.len()) }
|
|
|
|
fn each(&self, blk: &fn(v: &uint) -> bool) {
|
|
for self.bitv.storage.eachi |i, &w| {
|
|
if !iterate_bits(i * uint::bits, w, |b| blk(&b)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl cmp::Eq for BitvSet {
|
|
fn eq(&self, other: &BitvSet) -> bool {
|
|
if self.size != other.size {
|
|
return false;
|
|
}
|
|
for self.each_common(other) |_, w1, w2| {
|
|
if w1 != w2 {
|
|
return false;
|
|
}
|
|
}
|
|
for self.each_outlier(other) |_, _, w| {
|
|
if w != 0 {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
fn ne(&self, other: &BitvSet) -> bool { !self.eq(other) }
|
|
}
|
|
|
|
impl Container for BitvSet {
|
|
fn len(&const self) -> uint { self.size }
|
|
fn is_empty(&const self) -> bool { self.size == 0 }
|
|
}
|
|
|
|
impl Mutable for BitvSet {
|
|
fn clear(&mut self) {
|
|
for self.bitv.each_storage |w| { *w = 0; }
|
|
self.size = 0;
|
|
}
|
|
}
|
|
|
|
impl Set<uint> for BitvSet {
|
|
fn contains(&self, value: &uint) -> bool {
|
|
*value < self.bitv.storage.len() * uint::bits && self.bitv.get(*value)
|
|
}
|
|
|
|
fn insert(&mut self, value: uint) -> bool {
|
|
if self.contains(&value) {
|
|
return false;
|
|
}
|
|
let nbits = self.capacity();
|
|
if value >= nbits {
|
|
let newsize = uint::max(value, nbits * 2) / uint::bits + 1;
|
|
assert!(newsize > self.bitv.storage.len());
|
|
self.bitv.storage.grow(newsize, &0);
|
|
}
|
|
self.size += 1;
|
|
self.bitv.set(value, true);
|
|
return true;
|
|
}
|
|
|
|
fn remove(&mut self, value: &uint) -> bool {
|
|
if !self.contains(value) {
|
|
return false;
|
|
}
|
|
self.size -= 1;
|
|
self.bitv.set(*value, false);
|
|
|
|
// Attempt to truncate our storage
|
|
let mut i = self.bitv.storage.len();
|
|
while i > 1 && self.bitv.storage[i - 1] == 0 {
|
|
i -= 1;
|
|
}
|
|
self.bitv.storage.truncate(i);
|
|
|
|
return true;
|
|
}
|
|
|
|
fn is_disjoint(&self, other: &BitvSet) -> bool {
|
|
for self.intersection(other) |_| {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
fn is_subset(&self, other: &BitvSet) -> bool {
|
|
for self.each_common(other) |_, w1, w2| {
|
|
if w1 & w2 != w1 {
|
|
return false;
|
|
}
|
|
}
|
|
/* If anything is not ours, then everything is not ours so we're
|
|
definitely a subset in that case. Otherwise if there's any stray
|
|
ones that 'other' doesn't have, we're not a subset. */
|
|
for self.each_outlier(other) |mine, _, w| {
|
|
if !mine {
|
|
return true;
|
|
} else if w != 0 {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
fn is_superset(&self, other: &BitvSet) -> bool {
|
|
other.is_subset(self)
|
|
}
|
|
|
|
fn difference(&self, other: &BitvSet, f: &fn(&uint) -> bool) {
|
|
for self.each_common(other) |i, w1, w2| {
|
|
if !iterate_bits(i, w1 & !w2, |b| f(&b)) {
|
|
return;
|
|
}
|
|
}
|
|
/* everything we have that they don't also shows up */
|
|
self.each_outlier(other, |mine, i, w|
|
|
!mine || iterate_bits(i, w, |b| f(&b))
|
|
);
|
|
}
|
|
|
|
fn symmetric_difference(&self, other: &BitvSet,
|
|
f: &fn(&uint) -> bool) {
|
|
for self.each_common(other) |i, w1, w2| {
|
|
if !iterate_bits(i, w1 ^ w2, |b| f(&b)) {
|
|
return;
|
|
}
|
|
}
|
|
self.each_outlier(other, |_, i, w|
|
|
iterate_bits(i, w, |b| f(&b))
|
|
);
|
|
}
|
|
|
|
fn intersection(&self, other: &BitvSet, f: &fn(&uint) -> bool) {
|
|
for self.each_common(other) |i, w1, w2| {
|
|
if !iterate_bits(i, w1 & w2, |b| f(&b)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
fn union(&self, other: &BitvSet, f: &fn(&uint) -> bool) {
|
|
for self.each_common(other) |i, w1, w2| {
|
|
if !iterate_bits(i, w1 | w2, |b| f(&b)) {
|
|
return;
|
|
}
|
|
}
|
|
self.each_outlier(other, |_, i, w|
|
|
iterate_bits(i, w, |b| f(&b))
|
|
);
|
|
}
|
|
}
|
|
|
|
priv impl BitvSet {
|
|
/// Visits each of the words that the two bit vectors (self and other)
|
|
/// both have in common. The three yielded arguments are (bit location,
|
|
/// w1, w2) where the bit location is the number of bits offset so far,
|
|
/// and w1/w2 are the words coming from the two vectors self, other.
|
|
fn each_common(&self, other: &BitvSet,
|
|
f: &fn(uint, uint, uint) -> bool) {
|
|
let min = uint::min(self.bitv.storage.len(),
|
|
other.bitv.storage.len());
|
|
for self.bitv.storage.slice(0, min).eachi |i, &w| {
|
|
if !f(i * uint::bits, w, other.bitv.storage[i]) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Visits each word in self or other that extends beyond the other. This
|
|
/// will only iterate through one of the vectors, and it only iterates
|
|
/// over the portion that doesn't overlap with the other one.
|
|
///
|
|
/// The yielded arguments are a bool, the bit offset, and a word. The bool
|
|
/// is true if the word comes from 'self', and false if it comes from
|
|
/// 'other'.
|
|
fn each_outlier(&self, other: &BitvSet,
|
|
f: &fn(bool, uint, uint) -> bool) {
|
|
let len1 = self.bitv.storage.len();
|
|
let len2 = other.bitv.storage.len();
|
|
let min = uint::min(len1, len2);
|
|
|
|
/* only one of these loops will execute and that's the point */
|
|
for self.bitv.storage.slice(min, len1).eachi |i, &w| {
|
|
if !f(true, (i + min) * uint::bits, w) {
|
|
return;
|
|
}
|
|
}
|
|
for other.bitv.storage.slice(min, len2).eachi |i, &w| {
|
|
if !f(false, (i + min) * uint::bits, w) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use core::prelude::*;
|
|
use std::test::BenchHarness;
|
|
|
|
use bitv::*;
|
|
use bitv;
|
|
|
|
use core::uint;
|
|
use core::vec;
|
|
use core::rand;
|
|
use core::rand::Rng;
|
|
|
|
static bench_bits : uint = 1 << 14;
|
|
|
|
#[test]
|
|
fn test_to_str() {
|
|
let zerolen = Bitv::new(0u, false);
|
|
assert!(zerolen.to_str() == ~"");
|
|
|
|
let eightbits = Bitv::new(8u, false);
|
|
assert!(eightbits.to_str() == ~"00000000");
|
|
}
|
|
|
|
#[test]
|
|
fn test_0_elements() {
|
|
let mut act;
|
|
let exp;
|
|
act = Bitv::new(0u, false);
|
|
exp = vec::from_elem::<uint>(0u, 0u);
|
|
assert!(act.eq_vec(exp));
|
|
}
|
|
|
|
#[test]
|
|
fn test_1_element() {
|
|
let mut act;
|
|
act = Bitv::new(1u, false);
|
|
assert!(act.eq_vec(~[0u]));
|
|
act = Bitv::new(1u, true);
|
|
assert!(act.eq_vec(~[1u]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_2_elements() {
|
|
let mut b = bitv::Bitv::new(2, false);
|
|
b.set(0, true);
|
|
b.set(1, false);
|
|
assert!(b.to_str() == ~"10");
|
|
}
|
|
|
|
#[test]
|
|
fn test_10_elements() {
|
|
let mut act;
|
|
// all 0
|
|
|
|
act = Bitv::new(10u, false);
|
|
assert!((act.eq_vec(~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u])));
|
|
// all 1
|
|
|
|
act = Bitv::new(10u, true);
|
|
assert!((act.eq_vec(~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u])));
|
|
// mixed
|
|
|
|
act = Bitv::new(10u, false);
|
|
act.set(0u, true);
|
|
act.set(1u, true);
|
|
act.set(2u, true);
|
|
act.set(3u, true);
|
|
act.set(4u, true);
|
|
assert!((act.eq_vec(~[1u, 1u, 1u, 1u, 1u, 0u, 0u, 0u, 0u, 0u])));
|
|
// mixed
|
|
|
|
act = Bitv::new(10u, false);
|
|
act.set(5u, true);
|
|
act.set(6u, true);
|
|
act.set(7u, true);
|
|
act.set(8u, true);
|
|
act.set(9u, true);
|
|
assert!((act.eq_vec(~[0u, 0u, 0u, 0u, 0u, 1u, 1u, 1u, 1u, 1u])));
|
|
// mixed
|
|
|
|
act = Bitv::new(10u, false);
|
|
act.set(0u, true);
|
|
act.set(3u, true);
|
|
act.set(6u, true);
|
|
act.set(9u, true);
|
|
assert!((act.eq_vec(~[1u, 0u, 0u, 1u, 0u, 0u, 1u, 0u, 0u, 1u])));
|
|
}
|
|
|
|
#[test]
|
|
fn test_31_elements() {
|
|
let mut act;
|
|
// all 0
|
|
|
|
act = Bitv::new(31u, false);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u]));
|
|
// all 1
|
|
|
|
act = Bitv::new(31u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(31u, false);
|
|
act.set(0u, true);
|
|
act.set(1u, true);
|
|
act.set(2u, true);
|
|
act.set(3u, true);
|
|
act.set(4u, true);
|
|
act.set(5u, true);
|
|
act.set(6u, true);
|
|
act.set(7u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(31u, false);
|
|
act.set(16u, true);
|
|
act.set(17u, true);
|
|
act.set(18u, true);
|
|
act.set(19u, true);
|
|
act.set(20u, true);
|
|
act.set(21u, true);
|
|
act.set(22u, true);
|
|
act.set(23u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(31u, false);
|
|
act.set(24u, true);
|
|
act.set(25u, true);
|
|
act.set(26u, true);
|
|
act.set(27u, true);
|
|
act.set(28u, true);
|
|
act.set(29u, true);
|
|
act.set(30u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(31u, false);
|
|
act.set(3u, true);
|
|
act.set(17u, true);
|
|
act.set(30u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_32_elements() {
|
|
let mut act;
|
|
// all 0
|
|
|
|
act = Bitv::new(32u, false);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// all 1
|
|
|
|
act = Bitv::new(32u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(32u, false);
|
|
act.set(0u, true);
|
|
act.set(1u, true);
|
|
act.set(2u, true);
|
|
act.set(3u, true);
|
|
act.set(4u, true);
|
|
act.set(5u, true);
|
|
act.set(6u, true);
|
|
act.set(7u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(32u, false);
|
|
act.set(16u, true);
|
|
act.set(17u, true);
|
|
act.set(18u, true);
|
|
act.set(19u, true);
|
|
act.set(20u, true);
|
|
act.set(21u, true);
|
|
act.set(22u, true);
|
|
act.set(23u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(32u, false);
|
|
act.set(24u, true);
|
|
act.set(25u, true);
|
|
act.set(26u, true);
|
|
act.set(27u, true);
|
|
act.set(28u, true);
|
|
act.set(29u, true);
|
|
act.set(30u, true);
|
|
act.set(31u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(32u, false);
|
|
act.set(3u, true);
|
|
act.set(17u, true);
|
|
act.set(30u, true);
|
|
act.set(31u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u, 1u]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_33_elements() {
|
|
let mut act;
|
|
// all 0
|
|
|
|
act = Bitv::new(33u, false);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// all 1
|
|
|
|
act = Bitv::new(33u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u, 1u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(33u, false);
|
|
act.set(0u, true);
|
|
act.set(1u, true);
|
|
act.set(2u, true);
|
|
act.set(3u, true);
|
|
act.set(4u, true);
|
|
act.set(5u, true);
|
|
act.set(6u, true);
|
|
act.set(7u, true);
|
|
assert!(act.eq_vec(
|
|
~[1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(33u, false);
|
|
act.set(16u, true);
|
|
act.set(17u, true);
|
|
act.set(18u, true);
|
|
act.set(19u, true);
|
|
act.set(20u, true);
|
|
act.set(21u, true);
|
|
act.set(22u, true);
|
|
act.set(23u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(33u, false);
|
|
act.set(24u, true);
|
|
act.set(25u, true);
|
|
act.set(26u, true);
|
|
act.set(27u, true);
|
|
act.set(28u, true);
|
|
act.set(29u, true);
|
|
act.set(30u, true);
|
|
act.set(31u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 1u, 1u,
|
|
1u, 1u, 1u, 1u, 1u, 1u, 0u]));
|
|
// mixed
|
|
|
|
act = Bitv::new(33u, false);
|
|
act.set(3u, true);
|
|
act.set(17u, true);
|
|
act.set(30u, true);
|
|
act.set(31u, true);
|
|
act.set(32u, true);
|
|
assert!(act.eq_vec(
|
|
~[0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
|
|
0u, 0u, 0u, 0u, 1u, 1u, 1u]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_equal_differing_sizes() {
|
|
let v0 = Bitv::new(10u, false);
|
|
let v1 = Bitv::new(11u, false);
|
|
assert!(!v0.equal(&v1));
|
|
}
|
|
|
|
#[test]
|
|
fn test_equal_greatly_differing_sizes() {
|
|
let v0 = Bitv::new(10u, false);
|
|
let v1 = Bitv::new(110u, false);
|
|
assert!(!v0.equal(&v1));
|
|
}
|
|
|
|
#[test]
|
|
fn test_equal_sneaky_small() {
|
|
let mut a = bitv::Bitv::new(1, false);
|
|
a.set(0, true);
|
|
|
|
let mut b = bitv::Bitv::new(1, true);
|
|
b.set(0, true);
|
|
|
|
assert!(a.equal(&b));
|
|
}
|
|
|
|
#[test]
|
|
fn test_equal_sneaky_big() {
|
|
let mut a = bitv::Bitv::new(100, false);
|
|
for uint::range(0, 100) |i| {
|
|
a.set(i, true);
|
|
}
|
|
|
|
let mut b = bitv::Bitv::new(100, true);
|
|
for uint::range(0, 100) |i| {
|
|
b.set(i, true);
|
|
}
|
|
|
|
assert!(a.equal(&b));
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_bytes() {
|
|
let bitv = from_bytes([0b10110110, 0b00000000, 0b11111111]);
|
|
let str = ~"10110110" + ~"00000000" + ~"11111111";
|
|
assert!(bitv.to_str() == str);
|
|
}
|
|
|
|
#[test]
|
|
fn test_to_bytes() {
|
|
let mut bv = Bitv::new(3, true);
|
|
bv.set(1, false);
|
|
assert!(bv.to_bytes() == ~[0b10100000]);
|
|
|
|
let mut bv = Bitv::new(9, false);
|
|
bv.set(2, true);
|
|
bv.set(8, true);
|
|
assert!(bv.to_bytes() == ~[0b00100000, 0b10000000]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_from_bools() {
|
|
assert!(from_bools([true, false, true, true]).to_str() ==
|
|
~"1011");
|
|
}
|
|
|
|
#[test]
|
|
fn test_to_bools() {
|
|
let bools = ~[false, false, true, false, false, true, true, false];
|
|
assert!(from_bytes([0b00100110]).to_bools() == bools);
|
|
}
|
|
|
|
#[test]
|
|
fn test_small_difference() {
|
|
let mut b1 = Bitv::new(3, false);
|
|
let mut b2 = Bitv::new(3, false);
|
|
b1.set(0, true);
|
|
b1.set(1, true);
|
|
b2.set(1, true);
|
|
b2.set(2, true);
|
|
assert!(b1.difference(&b2));
|
|
assert!(b1[0]);
|
|
assert!(!b1[1]);
|
|
assert!(!b1[2]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_big_difference() {
|
|
let mut b1 = Bitv::new(100, false);
|
|
let mut b2 = Bitv::new(100, false);
|
|
b1.set(0, true);
|
|
b1.set(40, true);
|
|
b2.set(40, true);
|
|
b2.set(80, true);
|
|
assert!(b1.difference(&b2));
|
|
assert!(b1[0]);
|
|
assert!(!b1[40]);
|
|
assert!(!b1[80]);
|
|
}
|
|
|
|
#[test]
|
|
fn test_small_clear() {
|
|
let mut b = Bitv::new(14, true);
|
|
b.clear();
|
|
for b.ones |i| {
|
|
fail!(fmt!("found 1 at %?", i));
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_big_clear() {
|
|
let mut b = Bitv::new(140, true);
|
|
b.clear();
|
|
for b.ones |i| {
|
|
fail!(fmt!("found 1 at %?", i));
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_set_basic() {
|
|
let mut b = BitvSet::new();
|
|
assert!(b.insert(3));
|
|
assert!(!b.insert(3));
|
|
assert!(b.contains(&3));
|
|
assert!(b.insert(400));
|
|
assert!(!b.insert(400));
|
|
assert!(b.contains(&400));
|
|
assert!(b.len() == 2);
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_set_intersection() {
|
|
let mut a = BitvSet::new();
|
|
let mut b = BitvSet::new();
|
|
|
|
assert!(a.insert(11));
|
|
assert!(a.insert(1));
|
|
assert!(a.insert(3));
|
|
assert!(a.insert(77));
|
|
assert!(a.insert(103));
|
|
assert!(a.insert(5));
|
|
|
|
assert!(b.insert(2));
|
|
assert!(b.insert(11));
|
|
assert!(b.insert(77));
|
|
assert!(b.insert(5));
|
|
assert!(b.insert(3));
|
|
|
|
let mut i = 0;
|
|
let expected = [3, 5, 11, 77];
|
|
for a.intersection(&b) |x| {
|
|
assert!(*x == expected[i]);
|
|
i += 1
|
|
}
|
|
assert!(i == expected.len());
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_set_difference() {
|
|
let mut a = BitvSet::new();
|
|
let mut b = BitvSet::new();
|
|
|
|
assert!(a.insert(1));
|
|
assert!(a.insert(3));
|
|
assert!(a.insert(5));
|
|
assert!(a.insert(200));
|
|
assert!(a.insert(500));
|
|
|
|
assert!(b.insert(3));
|
|
assert!(b.insert(200));
|
|
|
|
let mut i = 0;
|
|
let expected = [1, 5, 500];
|
|
for a.difference(&b) |x| {
|
|
assert!(*x == expected[i]);
|
|
i += 1
|
|
}
|
|
assert!(i == expected.len());
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_set_symmetric_difference() {
|
|
let mut a = BitvSet::new();
|
|
let mut b = BitvSet::new();
|
|
|
|
assert!(a.insert(1));
|
|
assert!(a.insert(3));
|
|
assert!(a.insert(5));
|
|
assert!(a.insert(9));
|
|
assert!(a.insert(11));
|
|
|
|
assert!(b.insert(3));
|
|
assert!(b.insert(9));
|
|
assert!(b.insert(14));
|
|
assert!(b.insert(220));
|
|
|
|
let mut i = 0;
|
|
let expected = [1, 5, 11, 14, 220];
|
|
for a.symmetric_difference(&b) |x| {
|
|
assert!(*x == expected[i]);
|
|
i += 1
|
|
}
|
|
assert!(i == expected.len());
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_set_union() {
|
|
let mut a = BitvSet::new();
|
|
let mut b = BitvSet::new();
|
|
assert!(a.insert(1));
|
|
assert!(a.insert(3));
|
|
assert!(a.insert(5));
|
|
assert!(a.insert(9));
|
|
assert!(a.insert(11));
|
|
assert!(a.insert(160));
|
|
assert!(a.insert(19));
|
|
assert!(a.insert(24));
|
|
|
|
assert!(b.insert(1));
|
|
assert!(b.insert(5));
|
|
assert!(b.insert(9));
|
|
assert!(b.insert(13));
|
|
assert!(b.insert(19));
|
|
|
|
let mut i = 0;
|
|
let expected = [1, 3, 5, 9, 11, 13, 19, 24, 160];
|
|
for a.union(&b) |x| {
|
|
assert!(*x == expected[i]);
|
|
i += 1
|
|
}
|
|
assert!(i == expected.len());
|
|
}
|
|
|
|
#[test]
|
|
fn test_bitv_remove() {
|
|
let mut a = BitvSet::new();
|
|
|
|
assert!(a.insert(1));
|
|
assert!(a.remove(&1));
|
|
|
|
assert!(a.insert(100));
|
|
assert!(a.remove(&100));
|
|
|
|
assert!(a.insert(1000));
|
|
assert!(a.remove(&1000));
|
|
assert!(a.capacity() == uint::bits);
|
|
}
|
|
|
|
fn rng() -> rand::RandRes {
|
|
let seed = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];
|
|
rand::IsaacRng::new_seeded(seed)
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_uint_small(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = 0 as uint;
|
|
do b.iter {
|
|
bitv |= (1 << ((r.next() as uint) % uint::bits));
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_small_bitv_small(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = SmallBitv::new(uint::bits);
|
|
do b.iter {
|
|
bitv.set((r.next() as uint) % uint::bits, true);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_big_bitv_small(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = BigBitv::new(~[0]);
|
|
do b.iter {
|
|
bitv.set((r.next() as uint) % uint::bits, true);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_big_bitv_big(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut storage = ~[];
|
|
storage.grow(bench_bits / uint::bits, &0);
|
|
let mut bitv = BigBitv::new(storage);
|
|
do b.iter {
|
|
bitv.set((r.next() as uint) % bench_bits, true);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_bitv_big(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = Bitv::new(bench_bits, false);
|
|
do b.iter {
|
|
bitv.set((r.next() as uint) % bench_bits, true);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_bitv_small(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = Bitv::new(uint::bits, false);
|
|
do b.iter {
|
|
bitv.set((r.next() as uint) % uint::bits, true);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_bitv_set_small(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = BitvSet::new();
|
|
do b.iter {
|
|
bitv.insert((r.next() as uint) % uint::bits);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_bitv_set_big(b: &mut BenchHarness) {
|
|
let r = rng();
|
|
let mut bitv = BitvSet::new();
|
|
do b.iter {
|
|
bitv.insert((r.next() as uint) % bench_bits);
|
|
}
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_bitv_big_union(b: &mut BenchHarness) {
|
|
let mut b1 = Bitv::new(bench_bits, false);
|
|
let mut b2 = Bitv::new(bench_bits, false);
|
|
do b.iter {
|
|
b1.union(&b2);
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Local Variables:
|
|
// mode: rust
|
|
// fill-column: 78;
|
|
// indent-tabs-mode: nil
|
|
// c-basic-offset: 4
|
|
// buffer-file-coding-system: utf-8-unix
|
|
// End:
|
|
//
|