1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
use std;
use std::marker::PhantomData;
#[cfg(test)]
use proptest::prelude::*;
pub trait Fits64 : Copy {
unsafe fn from_u64(x: u64) -> Self;
fn to_u64(self) -> u64;
}
pub fn test_fits64<T: Fits64+Eq+std::fmt::Debug>(x: T) {
let x64 = x.to_u64();
let y = unsafe { T::from_u64(x64) };
let y64 = y.to_u64();
assert_eq!(x, y);
assert_eq!(x64, y64);
}
macro_rules! define_fits {
($ty: ty, $test_name: ident) => {
impl Fits64 for $ty {
#[inline]
unsafe fn from_u64(x: u64) -> Self { x as $ty }
#[inline]
fn to_u64(self) -> u64 { self as u64 }
}
#[cfg(test)]
proptest!{
#[test]
fn $test_name(x: $ty) {
test_fits64(x);
}
}
};
}
define_fits!(u64, fits_u64);
define_fits!(u32, fits_u32);
define_fits!(u16, fits_u16);
define_fits!(u8, fits_u8);
define_fits!(usize, fits_usize);
impl Fits64 for char {
#[inline]
unsafe fn from_u64(x: u64) -> Self {
std::char::from_u32(x as u32).unwrap()
}
#[inline]
fn to_u64(self) -> u64 { self as u64 }
}
const USE_BRANCHES: bool = false;
macro_rules! define_ifits {
($ty: ty, $uty: ty, $test_name: ident) => {
impl Fits64 for $ty {
#[inline]
unsafe fn from_u64(x: u64) -> Self {
let pos_val = (x >> 1) as $ty;
let neg_val = !(x >> 1) as $ty;
if USE_BRANCHES {
if x & 1 == 1 {
neg_val
} else {
pos_val
}
} else {
let pos_mask = (x & 1) as $ty - 1;
(pos_val & pos_mask) | (neg_val & !pos_mask)
}
}
#[inline]
fn to_u64(self) -> u64 {
let neg_rep = ((!self as u64) << 1) | 1;
let pos_rep = (self as u64) << 1;
if USE_BRANCHES {
if self < 0 {
neg_rep
} else {
pos_rep
}
} else {
let neg_mask = ((self >= 0) as i64 - 1) as u64;
(neg_rep & neg_mask) | (pos_rep & !neg_mask)
}
}
}
#[cfg(test)]
proptest!{
#[test]
fn $test_name(x: $ty) {
println!("\ntesting {}", x);
test_fits64(x);
}
}
};
}
define_ifits!(i8, u8, fits_i8);
define_ifits!(i16, u16, fits_i16);
define_ifits!(i32, u32, fits_i32);
define_ifits!(i64, u64, fits_i64);
define_ifits!(isize, usize, fits_isize);
#[derive(Debug, Clone)]
pub struct Set64<T: Fits64>(crate::setu64::SetU64, PhantomData<T>);
impl<T: Fits64> Default for Set64<T> {
fn default() -> Self {
Set64(crate::setu64::SetU64::new(), PhantomData)
}
}
impl<T: Fits64> Set64<T> {
pub fn new() -> Self {
Self::default()
}
pub fn with_capacity(_cap: usize) -> Self {
Self::new()
}
pub fn insert(&mut self, elem: T) -> bool {
self.0.insert(elem.to_u64())
}
pub fn len(&self) -> usize {
self.0.len()
}
pub fn contains<R: std::borrow::Borrow<T>>(&self, value: R) -> bool {
let x = value.borrow().clone().to_u64();
self.0.contains(x)
}
pub fn remove(&mut self, value: &T) -> bool {
let x = value.clone().to_u64();
self.0.remove(x)
}
pub fn iter<'a>(&'a self) -> impl Iterator<Item=T> + 'a {
self.0.iter().map(|x| unsafe { T::from_u64(x) })
}
pub fn drain<'a>(&'a mut self) -> impl Iterator<Item=T> + 'a {
self.0.drain().map(|x| unsafe { T::from_u64(x) })
}
}
impl<T: Fits64> PartialEq for Set64<T> {
fn eq(&self, other: &Set64<T>) -> bool {
if self.len() != other.len() {
return false;
}
for k in other.iter() {
if !self.contains(k) {
return false;
}
}
true
}
}
impl<T: Fits64> Eq for Set64<T> {}
impl<T: Fits64> std::hash::Hash for Set64<T> {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
let mut membs: Vec<u64> = self.iter().map(|i| i.to_u64()).collect();
membs.sort();
for memb in membs {
memb.hash(state);
}
}
}
impl<T: Fits64> std::iter::FromIterator<T> for Set64<T> {
fn from_iter<I: IntoIterator<Item=T>>(iter: I) -> Self {
let iter = iter.into_iter();
let (sz,_) = iter.size_hint();
let mut c = Set64::with_capacity(sz);
for i in iter {
c.insert(i);
}
c
}
}
pub struct IntoIter<T: Fits64>( crate::setu64::IntoIter, PhantomData<T> );
impl<T: Fits64> Iterator for IntoIter<T> {
type Item = T;
#[inline]
fn next(&mut self) -> Option<T> {
self.0.next().map(|x| unsafe { T::from_u64(x) })
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
self.0.size_hint()
}
#[inline]
fn count(self) -> usize {
self.0.count()
}
#[inline]
fn last(self) -> Option<T> {
self.0.last().map(|x| unsafe { T::from_u64(x) })
}
}
impl<T: Fits64> IntoIterator for Set64<T> {
type Item = T;
type IntoIter = IntoIter<T>;
fn into_iter(self) -> IntoIter<T> {
IntoIter(self.0.into_iter(), PhantomData)
}
}
impl<'a, 'b, T: Fits64> std::ops::Sub<&'b Set64<T>> for &'a Set64<T> {
type Output = Set64<T>;
fn sub(self, rhs: &Set64<T>) -> Set64<T> {
let mut s = Set64::with_capacity(self.len());
for v in self.iter() {
if !rhs.contains(&v) {
s.insert(v);
}
}
s
}
}
impl<T: Fits64> Extend<T> for Set64<T> {
fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) {
let iter = iter.into_iter();
for i in iter {
self.insert(i);
}
}
}
impl<'a, 'b, T: Fits64> std::ops::BitOr<&'b Set64<T>> for &'a Set64<T> {
type Output = Set64<T>;
fn bitor(self, rhs: &Set64<T>) -> Set64<T> {
let mut s: Set64<T> = Set64::with_capacity(self.len() + rhs.len());
for x in self.iter() {
s.insert(x);
}
for x in rhs.iter() {
s.insert(x);
}
s
}
}
impl<T: Fits64 + Eq + Ord + std::fmt::Debug + std::fmt::Display> crate::copyset::CopySet for Set64<T> {
type Item = T;
type Iter = IntoIter<T>;
fn ins(&mut self, e: Self::Item) -> bool {
self.insert(e)
}
fn rem(&mut self, e: Self::Item) -> bool {
self.remove(&e)
}
fn con(&self, e: Self::Item) -> bool {
self.contains(&e)
}
fn vec(&self) -> Vec<Self::Item> {
self.iter().collect()
}
fn ln(&self) -> usize {
self.len()
}
fn it(self) -> Self::Iter {
self.into_iter()
}
}
#[cfg(test)]
proptest!{
#[test]
fn copycheck_random_sets(slice in prop::collection::vec(1u64..5, 1usize..10)) {
crate::copyset::check_set::<Set64<u64>>(&slice);
}
#[test]
fn copycheck_medium_sets(slice in prop::collection::vec(1u64..255, 1usize..100)) {
crate::copyset::check_set::<Set64<u64>>(&slice);
}
#[test]
fn copycheck_big_sets(slice: Vec<u64>) {
crate::copyset::check_set::<Set64<u64>>(&slice);
}
#[test]
fn copycheck_u8_sets(slice: Vec<u8>) {
crate::copyset::check_set::<Set64<u8>>(&slice);
}
}