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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/hashlink/src/linked_hash_set.rs | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/hashlink/src/linked_hash_set.rs')
-rw-r--r-- | third_party/rust/hashlink/src/linked_hash_set.rs | 766 |
1 files changed, 766 insertions, 0 deletions
diff --git a/third_party/rust/hashlink/src/linked_hash_set.rs b/third_party/rust/hashlink/src/linked_hash_set.rs new file mode 100644 index 0000000000..5a89875d47 --- /dev/null +++ b/third_party/rust/hashlink/src/linked_hash_set.rs @@ -0,0 +1,766 @@ +use std::{ + borrow::Borrow, + fmt, + hash::{BuildHasher, Hash, Hasher}, + iter::{Chain, FromIterator}, + ops::{BitAnd, BitOr, BitXor, Sub}, +}; + +use hashbrown::hash_map::DefaultHashBuilder; + +use crate::linked_hash_map::{self, LinkedHashMap, TryReserveError}; + +pub struct LinkedHashSet<T, S = DefaultHashBuilder> { + map: LinkedHashMap<T, (), S>, +} + +impl<T: Hash + Eq> LinkedHashSet<T, DefaultHashBuilder> { + #[inline] + pub fn new() -> LinkedHashSet<T, DefaultHashBuilder> { + LinkedHashSet { + map: LinkedHashMap::new(), + } + } + + #[inline] + pub fn with_capacity(capacity: usize) -> LinkedHashSet<T, DefaultHashBuilder> { + LinkedHashSet { + map: LinkedHashMap::with_capacity(capacity), + } + } +} + +impl<T, S> LinkedHashSet<T, S> { + #[inline] + pub fn capacity(&self) -> usize { + self.map.capacity() + } + + #[inline] + pub fn iter(&self) -> Iter<'_, T> { + Iter { + iter: self.map.keys(), + } + } + + #[inline] + pub fn len(&self) -> usize { + self.map.len() + } + + #[inline] + pub fn is_empty(&self) -> bool { + self.map.is_empty() + } + + #[inline] + pub fn drain(&mut self) -> Drain<T> { + Drain { + iter: self.map.drain(), + } + } + + #[inline] + pub fn clear(&mut self) { + self.map.clear() + } + + #[inline] + pub fn retain<F>(&mut self, mut f: F) + where + F: FnMut(&T) -> bool, + { + self.map.retain(|k, _| f(k)); + } +} + +impl<T, S> LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + pub fn with_hasher(hasher: S) -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::with_hasher(hasher), + } + } + + #[inline] + pub fn with_capacity_and_hasher(capacity: usize, hasher: S) -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::with_capacity_and_hasher(capacity, hasher), + } + } + + #[inline] + pub fn hasher(&self) -> &S { + self.map.hasher() + } + + #[inline] + pub fn reserve(&mut self, additional: usize) { + self.map.reserve(additional) + } + + #[inline] + pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> { + self.map.try_reserve(additional) + } + + #[inline] + pub fn shrink_to_fit(&mut self) { + self.map.shrink_to_fit() + } + + #[inline] + pub fn difference<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Difference<'a, T, S> { + Difference { + iter: self.iter(), + other, + } + } + + #[inline] + pub fn symmetric_difference<'a>( + &'a self, + other: &'a LinkedHashSet<T, S>, + ) -> SymmetricDifference<'a, T, S> { + SymmetricDifference { + iter: self.difference(other).chain(other.difference(self)), + } + } + + #[inline] + pub fn intersection<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Intersection<'a, T, S> { + Intersection { + iter: self.iter(), + other, + } + } + + #[inline] + pub fn union<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Union<'a, T, S> { + Union { + iter: self.iter().chain(other.difference(self)), + } + } + + #[inline] + pub fn contains<Q: ?Sized>(&self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.contains_key(value) + } + + #[inline] + pub fn get<Q: ?Sized>(&self, value: &Q) -> Option<&T> + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.raw_entry().from_key(value).map(|p| p.0) + } + + #[inline] + pub fn get_or_insert(&mut self, value: T) -> &T { + self.map + .raw_entry_mut() + .from_key(&value) + .or_insert(value, ()) + .0 + } + + #[inline] + pub fn get_or_insert_with<Q: ?Sized, F>(&mut self, value: &Q, f: F) -> &T + where + T: Borrow<Q>, + Q: Hash + Eq, + F: FnOnce(&Q) -> T, + { + self.map + .raw_entry_mut() + .from_key(value) + .or_insert_with(|| (f(value), ())) + .0 + } + + #[inline] + pub fn is_disjoint(&self, other: &LinkedHashSet<T, S>) -> bool { + self.iter().all(|v| !other.contains(v)) + } + + #[inline] + pub fn is_subset(&self, other: &LinkedHashSet<T, S>) -> bool { + self.iter().all(|v| other.contains(v)) + } + + #[inline] + pub fn is_superset(&self, other: &LinkedHashSet<T, S>) -> bool { + other.is_subset(self) + } + + /// Inserts the given value into the set. + /// + /// If the set did not have this value present, inserts it at the *back* of the internal linked + /// list and returns true, otherwise it moves the existing value to the *back* of the internal + /// linked list and returns false. + #[inline] + pub fn insert(&mut self, value: T) -> bool { + self.map.insert(value, ()).is_none() + } + + /// Adds the given value to the set, replacing the existing value. + /// + /// If a previous value existed, returns the replaced value. In this case, the value's position + /// in the internal linked list is *not* changed. + #[inline] + pub fn replace(&mut self, value: T) -> Option<T> { + match self.map.entry(value) { + linked_hash_map::Entry::Occupied(occupied) => Some(occupied.replace_key()), + linked_hash_map::Entry::Vacant(vacant) => { + vacant.insert(()); + None + } + } + } + + #[inline] + pub fn remove<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.remove(value).is_some() + } + + #[inline] + pub fn take<Q: ?Sized>(&mut self, value: &Q) -> Option<T> + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(occupied) => Some(occupied.remove_entry().0), + linked_hash_map::RawEntryMut::Vacant(_) => None, + } + } + + #[inline] + pub fn front(&self) -> Option<&T> { + self.map.front().map(|(k, _)| k) + } + + #[inline] + pub fn pop_front(&mut self) -> Option<T> { + self.map.pop_front().map(|(k, _)| k) + } + + #[inline] + pub fn back(&self) -> Option<&T> { + self.map.back().map(|(k, _)| k) + } + + #[inline] + pub fn pop_back(&mut self) -> Option<T> { + self.map.pop_back().map(|(k, _)| k) + } + + #[inline] + pub fn to_front<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(mut occupied) => { + occupied.to_front(); + true + } + linked_hash_map::RawEntryMut::Vacant(_) => false, + } + } + + #[inline] + pub fn to_back<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(mut occupied) => { + occupied.to_back(); + true + } + linked_hash_map::RawEntryMut::Vacant(_) => false, + } + } + + #[inline] + pub fn retain_with_order<F>(&mut self, mut f: F) + where + F: FnMut(&T) -> bool, + { + self.map.retain_with_order(|k, _| f(k)); + } +} + +impl<T: Hash + Eq + Clone, S: BuildHasher + Clone> Clone for LinkedHashSet<T, S> { + #[inline] + fn clone(&self) -> Self { + let map = self.map.clone(); + Self { map } + } +} + +impl<T, S> PartialEq for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn eq(&self, other: &Self) -> bool { + self.len() == other.len() && self.iter().eq(other) + } +} + +impl<T, S> Hash for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn hash<H: Hasher>(&self, state: &mut H) { + for e in self { + e.hash(state); + } + } +} + +impl<T, S> Eq for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ +} + +impl<T, S> fmt::Debug for LinkedHashSet<T, S> +where + T: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_set().entries(self.iter()).finish() + } +} + +impl<T, S> FromIterator<T> for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher + Default, +{ + #[inline] + fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> LinkedHashSet<T, S> { + let mut set = LinkedHashSet::with_hasher(Default::default()); + set.extend(iter); + set + } +} + +impl<T, S> Extend<T> for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) { + self.map.extend(iter.into_iter().map(|k| (k, ()))); + } +} + +impl<'a, T, S> Extend<&'a T> for LinkedHashSet<T, S> +where + T: 'a + Eq + Hash + Copy, + S: BuildHasher, +{ + #[inline] + fn extend<I: IntoIterator<Item = &'a T>>(&mut self, iter: I) { + self.extend(iter.into_iter().cloned()); + } +} + +impl<T, S> Default for LinkedHashSet<T, S> +where + S: Default, +{ + #[inline] + fn default() -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::default(), + } + } +} + +impl<'a, 'b, T, S> BitOr<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitor(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.union(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> BitAnd<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitand(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.intersection(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> BitXor<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitxor(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.symmetric_difference(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> Sub<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn sub(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.difference(rhs).cloned().collect() + } +} + +pub struct Iter<'a, K> { + iter: linked_hash_map::Keys<'a, K, ()>, +} + +pub struct IntoIter<K> { + iter: linked_hash_map::IntoIter<K, ()>, +} + +pub struct Drain<'a, K: 'a> { + iter: linked_hash_map::Drain<'a, K, ()>, +} + +pub struct Intersection<'a, T, S> { + iter: Iter<'a, T>, + other: &'a LinkedHashSet<T, S>, +} + +pub struct Difference<'a, T, S> { + iter: Iter<'a, T>, + other: &'a LinkedHashSet<T, S>, +} + +pub struct SymmetricDifference<'a, T, S> { + iter: Chain<Difference<'a, T, S>, Difference<'a, T, S>>, +} + +pub struct Union<'a, T, S> { + iter: Chain<Iter<'a, T>, Difference<'a, T, S>>, +} + +impl<'a, T, S> IntoIterator for &'a LinkedHashSet<T, S> { + type Item = &'a T; + type IntoIter = Iter<'a, T>; + + #[inline] + fn into_iter(self) -> Iter<'a, T> { + self.iter() + } +} + +impl<T, S> IntoIterator for LinkedHashSet<T, S> { + type Item = T; + type IntoIter = IntoIter<T>; + + #[inline] + fn into_iter(self) -> IntoIter<T> { + IntoIter { + iter: self.map.into_iter(), + } + } +} + +impl<'a, K> Clone for Iter<'a, K> { + #[inline] + fn clone(&self) -> Iter<'a, K> { + Iter { + iter: self.iter.clone(), + } + } +} +impl<'a, K> Iterator for Iter<'a, K> { + type Item = &'a K; + + #[inline] + fn next(&mut self) -> Option<&'a K> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, K> ExactSizeIterator for Iter<'a, K> {} + +impl<'a, T> DoubleEndedIterator for Iter<'a, T> { + #[inline] + fn next_back(&mut self) -> Option<&'a T> { + self.iter.next_back() + } +} + +impl<'a, K: fmt::Debug> fmt::Debug for Iter<'a, K> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<K> Iterator for IntoIter<K> { + type Item = K; + + #[inline] + fn next(&mut self) -> Option<K> { + self.iter.next().map(|(k, _)| k) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<K> ExactSizeIterator for IntoIter<K> {} + +impl<K> DoubleEndedIterator for IntoIter<K> { + #[inline] + fn next_back(&mut self) -> Option<K> { + self.iter.next_back().map(|(k, _)| k) + } +} + +impl<'a, K> Iterator for Drain<'a, K> { + type Item = K; + + #[inline] + fn next(&mut self) -> Option<K> { + self.iter.next().map(|(k, _)| k) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, K> DoubleEndedIterator for Drain<'a, K> { + #[inline] + fn next_back(&mut self) -> Option<K> { + self.iter.next_back().map(|(k, _)| k) + } +} + +impl<'a, K> ExactSizeIterator for Drain<'a, K> {} + +impl<'a, T, S> Clone for Intersection<'a, T, S> { + #[inline] + fn clone(&self) -> Intersection<'a, T, S> { + Intersection { + iter: self.iter.clone(), + ..*self + } + } +} + +impl<'a, T, S> Iterator for Intersection<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + loop { + match self.iter.next() { + None => return None, + Some(elt) => { + if self.other.contains(elt) { + return Some(elt); + } + } + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + let (_, upper) = self.iter.size_hint(); + (0, upper) + } +} + +impl<'a, T, S> fmt::Debug for Intersection<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for Difference<'a, T, S> { + #[inline] + fn clone(&self) -> Difference<'a, T, S> { + Difference { + iter: self.iter.clone(), + ..*self + } + } +} + +impl<'a, T, S> Iterator for Difference<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + loop { + match self.iter.next() { + None => return None, + Some(elt) => { + if !self.other.contains(elt) { + return Some(elt); + } + } + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + let (_, upper) = self.iter.size_hint(); + (0, upper) + } +} + +impl<'a, T, S> fmt::Debug for Difference<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for SymmetricDifference<'a, T, S> { + #[inline] + fn clone(&self) -> SymmetricDifference<'a, T, S> { + SymmetricDifference { + iter: self.iter.clone(), + } + } +} + +impl<'a, T, S> Iterator for SymmetricDifference<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, T, S> fmt::Debug for SymmetricDifference<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for Union<'a, T, S> { + #[inline] + fn clone(&self) -> Union<'a, T, S> { + Union { + iter: self.iter.clone(), + } + } +} + +impl<'a, T, S> fmt::Debug for Union<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Iterator for Union<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} |