2016-03-16 14:25:35 -04:00
|
|
|
// Copyright 2016 Matthew Collins
|
2015-09-17 11:21:56 -04:00
|
|
|
//
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
//
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
//
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
// limitations under the License.
|
2015-09-07 16:11:00 -04:00
|
|
|
|
|
|
|
pub struct Map {
|
|
|
|
bits: Vec<u64>,
|
2016-03-18 18:24:30 -04:00
|
|
|
pub bit_size: usize,
|
2015-10-07 14:36:59 -04:00
|
|
|
length: usize,
|
2015-09-07 16:11:00 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
|
|
|
fn test_map() {
|
|
|
|
let mut map = Map::new(4096, 4);
|
2015-10-07 14:36:59 -04:00
|
|
|
for i in 0..4096 {
|
|
|
|
for j in 0..16 {
|
2015-09-07 16:11:00 -04:00
|
|
|
map.set(i, j);
|
|
|
|
if map.get(i) != j {
|
|
|
|
panic!("Fail");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-07 16:52:36 -04:00
|
|
|
#[test]
|
|
|
|
fn test_map_odd() {
|
2015-10-07 14:36:59 -04:00
|
|
|
for size in 1..16 {
|
|
|
|
let mut map = Map::new(64 * 3, size);
|
2015-09-07 16:52:36 -04:00
|
|
|
let max = (1 << size) - 1;
|
2015-10-07 14:36:59 -04:00
|
|
|
for i in 0..64 * 3 {
|
|
|
|
for j in 0..max {
|
2015-09-07 16:52:36 -04:00
|
|
|
map.set(i, j);
|
|
|
|
if map.get(i) != j {
|
|
|
|
panic!("Index: {} wanted {} and got {}", i, j, map.get(i));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-07 16:11:00 -04:00
|
|
|
impl Map {
|
|
|
|
pub fn new(len: usize, size: usize) -> Map {
|
|
|
|
let mut map = Map {
|
2015-09-07 16:52:36 -04:00
|
|
|
bit_size: size,
|
2015-09-07 16:11:00 -04:00
|
|
|
length: len,
|
2015-10-07 14:36:59 -04:00
|
|
|
bits: Vec::with_capacity((len * size) / 64),
|
2015-09-07 16:11:00 -04:00
|
|
|
};
|
2015-10-07 14:36:59 -04:00
|
|
|
for _ in 0..len {
|
2015-09-07 16:11:00 -04:00
|
|
|
map.bits.push(0)
|
|
|
|
}
|
|
|
|
map
|
|
|
|
}
|
2016-03-21 10:05:13 -04:00
|
|
|
pub fn from_raw(bits: Vec<u64>, size: usize) -> Map {
|
|
|
|
Map {
|
2016-04-04 07:37:21 -04:00
|
|
|
length: (bits.len()*64 + (size-1)) / size,
|
2016-03-21 10:05:13 -04:00
|
|
|
bit_size: size,
|
|
|
|
bits: bits,
|
|
|
|
}
|
|
|
|
}
|
2015-09-07 16:11:00 -04:00
|
|
|
|
2016-03-18 18:24:30 -04:00
|
|
|
pub fn resize(&self, size: usize) -> Map {
|
2015-09-25 10:20:55 -04:00
|
|
|
let mut n = Map::new(self.length, size);
|
2015-10-07 14:36:59 -04:00
|
|
|
for i in 0..self.length {
|
2015-09-25 10:20:55 -04:00
|
|
|
n.set(i, self.get(i));
|
|
|
|
}
|
|
|
|
n
|
|
|
|
}
|
|
|
|
|
2015-09-07 16:11:00 -04:00
|
|
|
pub fn set(&mut self, i: usize, val: usize) {
|
2015-09-07 16:52:36 -04:00
|
|
|
let i = i * self.bit_size;
|
2015-09-07 16:11:00 -04:00
|
|
|
let pos = i / 64;
|
2016-04-02 11:24:50 -04:00
|
|
|
let mask = (1u64 << self.bit_size) - 1;
|
2015-09-07 16:52:36 -04:00
|
|
|
let ii = i % 64;
|
2016-04-02 11:24:50 -04:00
|
|
|
self.bits[pos] = (self.bits[pos] & !(mask << ii)) | ((val as u64) << ii);
|
2015-09-07 16:52:36 -04:00
|
|
|
let pos2 = (i + self.bit_size - 1) / 64;
|
|
|
|
if pos2 != pos {
|
|
|
|
let used = 64 - ii;
|
|
|
|
let rem = self.bit_size - used;
|
|
|
|
self.bits[pos2] = self.bits[pos2] >> rem << rem | (val as u64 >> used);
|
|
|
|
}
|
2015-09-07 16:11:00 -04:00
|
|
|
}
|
|
|
|
|
2015-09-25 10:20:55 -04:00
|
|
|
pub fn get(&self, i: usize) -> usize {
|
2015-09-07 16:52:36 -04:00
|
|
|
let i = i * self.bit_size;
|
2015-09-07 16:11:00 -04:00
|
|
|
let pos = i / 64;
|
2015-09-07 16:52:36 -04:00
|
|
|
let mask = (1 << self.bit_size) - 1;
|
|
|
|
let ii = i % 64;
|
|
|
|
let pos2 = (i + self.bit_size - 1) / 64;
|
2016-03-26 10:24:26 -04:00
|
|
|
if pos2 == pos {
|
|
|
|
((self.bits[pos] >> ii) & mask) as usize
|
|
|
|
} else {
|
2015-09-07 16:52:36 -04:00
|
|
|
let used = 64 - ii;
|
|
|
|
(((self.bits[pos] >> ii) | (self.bits[pos2] << used)) & mask) as usize
|
|
|
|
}
|
2015-09-07 16:11:00 -04:00
|
|
|
}
|
|
|
|
}
|