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mirror of https://github.com/charlienet/go-mixed.git synced 2025-07-17 16:12:42 +08:00
This commit is contained in:
2022-11-16 17:31:28 +08:00
parent ac346274c1
commit abe445f5e6
6 changed files with 486 additions and 5 deletions

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@ -0,0 +1,180 @@
package list
import (
"github.com/charlienet/go-mixed/locker"
)
const minCapacity = 16
type ArrayList[T any] struct {
buf []T
head int
tail int
minCap int
list[T]
}
func NewArrayList[T any](elems ...T) *ArrayList[T] {
minCap := minCapacity
var buf []T
return &ArrayList[T]{
buf: buf,
minCap: minCap,
list: list[T]{locker: locker.EmptyLocker},
}
}
func (l *ArrayList[T]) PushFront(v T) {
l.locker.Lock()
defer l.locker.Unlock()
l.grow()
l.head = l.prev(l.head)
l.buf[l.head] = v
l.size++
}
func (l *ArrayList[T]) PushBack(v T) {
l.locker.Lock()
defer l.locker.Unlock()
l.grow()
l.buf[l.tail] = v
l.tail = l.next(l.tail)
l.size++
}
func (l *ArrayList[T]) PopFront() T {
l.locker.Lock()
defer l.locker.Unlock()
if l.size <= 0 {
panic("list: PopFront() called on empty list")
}
ret := l.buf[l.head]
var zero T
l.buf[l.head] = zero
l.head = l.next(l.head)
l.size--
l.shrink()
return ret
}
func (l *ArrayList[T]) PopBack() T {
l.locker.Lock()
defer l.locker.Unlock()
l.tail = l.prev(l.tail)
ret := l.buf[l.tail]
var zero T
l.buf[l.tail] = zero
l.size--
l.shrink()
return ret
}
func (l *ArrayList[T]) RemoveAt(at int) T {
if at < 0 || at >= l.Size() {
panic(ErrorOutOffRange)
}
l.locker.Lock()
defer l.locker.Unlock()
rm := (l.head + at) & (len(l.buf) - 1)
if at*2 < l.size {
for i := 0; i < at; i++ {
prev := l.prev(rm)
l.buf[prev], l.buf[rm] = l.buf[rm], l.buf[prev]
rm = prev
}
return l.PopFront()
}
swaps := l.size - at - 1
for i := 0; i < swaps; i++ {
next := l.next(rm)
l.buf[rm], l.buf[next] = l.buf[next], l.buf[rm]
rm = next
}
return l.PopBack()
}
func (l *ArrayList[T]) Front() T {
l.locker.RLock()
defer l.locker.RUnlock()
return l.buf[l.head]
}
func (l *ArrayList[T]) Back() T {
l.locker.RLock()
defer l.locker.RUnlock()
return l.buf[l.tail]
}
func (l *ArrayList[T]) ForEach(fn func(T)) {
l.locker.RLock()
defer l.locker.RUnlock()
n := l.head
for i := 0; i < l.size; i++ {
fn(l.buf[n])
n = l.next(n)
}
}
func (q *ArrayList[T]) prev(i int) int {
return (i - 1) & (len(q.buf) - 1)
}
func (l *ArrayList[T]) next(i int) int {
return (i + 1) & (len(l.buf) - 1)
}
func (l *ArrayList[T]) grow() {
if l.size != len(l.buf) {
return
}
if len(l.buf) == 0 {
if l.minCap == 0 {
l.minCap = minCapacity
}
l.buf = make([]T, l.minCap)
return
}
l.resize()
}
func (l *ArrayList[T]) shrink() {
if len(l.buf) > l.minCap && (l.size<<2) == len(l.buf) {
l.resize()
}
}
// resize resizes the list to fit exactly twice its current contents. This is
// used to grow the list when it is full, and also to shrink it when it is
// only a quarter full.
func (l *ArrayList[T]) resize() {
newBuf := make([]T, l.size<<1)
if l.tail > l.head {
copy(newBuf, l.buf[l.head:l.tail])
} else {
n := copy(newBuf, l.buf[l.head:])
copy(newBuf[n:], l.buf[:l.tail])
}
l.head = 0
l.tail = l.size
l.buf = newBuf
}

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@ -0,0 +1,40 @@
package list_test
import (
"testing"
"github.com/charlienet/go-mixed/collections/list"
)
func TestNewArrayList(t *testing.T) {
l := list.NewArrayList[int]()
_ = l
}
func TestArrayPushBack(t *testing.T) {
l := list.NewArrayList[int]()
l.PushBack(1)
l.PushBack(2)
l.PushBack(3)
l.ForEach(func(i int) {
t.Log(i)
})
}
func TestArrayPushFront(t *testing.T) {
l := list.NewArrayList[int]()
l.PushFront(1)
l.PushFront(2)
l.PushFront(3)
l.PushBack(99)
l.PushBack(88)
l.ForEach(func(i int) {
t.Log(i)
})
}

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@ -0,0 +1,141 @@
package list
import (
"github.com/charlienet/go-mixed/locker"
)
type LinkedList[T any] struct {
list[T]
front, tail *LinkedNode[T]
}
type LinkedNode[T any] struct {
Value T
Prev, Next *LinkedNode[T]
}
func NewLinkedList[T any](elems ...T) *LinkedList[T] {
return &LinkedList[T]{
list: list[T]{locker: locker.EmptyLocker},
}
}
func (l *LinkedList[T]) PushBack(v T) *LinkedList[T] {
l.pushBackNode(&LinkedNode[T]{Value: v})
return l
}
func (l *LinkedList[T]) PushFront(v T) *LinkedList[T] {
l.pushFrontNode(&LinkedNode[T]{Value: v})
return l
}
func (l *LinkedList[T]) FrontNode() *LinkedNode[T] {
return l.front
}
func (l *LinkedList[T]) Front() T {
return l.FrontNode().Value
}
func (l *LinkedList[T]) BackNode() *LinkedNode[T] {
return l.tail
}
func (l *LinkedList[T]) Back() T {
if l.size == 0 {
panic(ErrorOutOffRange)
}
return l.tail.Value
}
func (l *LinkedList[T]) ForEach(fn func(T) bool) {
l.locker.RLock()
defer l.locker.RUnlock()
for current := l.front; current != nil; current = current.Next {
if fn(current.Value) {
break
}
}
}
func (l *LinkedList[T]) Remove(n *LinkedNode[T]) {
l.locker.Lock()
defer l.locker.Unlock()
if n.Next != nil {
n.Next.Prev = n.Prev
} else {
l.tail = n.Prev
}
if n.Prev != nil {
n.Prev.Next = n.Next
} else {
l.front = n.Next
}
l.size--
}
func (l *LinkedList[T]) RemoveAt(index int) {
l.locker.Lock()
defer l.locker.Unlock()
var i int
var prev *LinkedNode[T]
prev = l.front
for current := l.front; current != nil; {
if i == index {
prev.Next = current.Next
current.Next = nil
l.size--
return
}
prev = current
current = current.Next
i++
}
}
func (l *LinkedList[T]) pushBackNode(n *LinkedNode[T]) {
l.locker.Lock()
defer l.locker.Unlock()
n.Next = nil
n.Prev = l.tail
if l.tail != nil {
l.tail.Next = n
} else {
l.front = n
}
l.tail = n
l.size++
}
func (l *LinkedList[T]) pushFrontNode(n *LinkedNode[T]) {
l.locker.Lock()
defer l.locker.Unlock()
n.Next = l.front
n.Prev = nil
if l.front != nil {
l.front.Prev = n
} else {
l.tail = n
}
l.front = n
l.size++
}

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@ -0,0 +1,87 @@
package list_test
import (
"testing"
"github.com/charlienet/go-mixed/collections/list"
"github.com/stretchr/testify/assert"
)
func TestPushBack(t *testing.T) {
l := list.NewLinkedList[int]()
l.PushBack(1)
l.PushBack(2)
l.PushBack(3)
l.ForEach(func(i int) bool {
t.Log(i)
return false
})
}
func TestPushFront(t *testing.T) {
l := list.NewLinkedList[int]()
l.PushFront(1)
l.PushFront(2)
l.PushFront(3)
l.ForEach(func(i int) bool {
t.Log(i)
return false
})
}
func TestRemoveAt(t *testing.T) {
l := list.NewLinkedList[int]()
l.PushBack(1)
l.PushBack(2)
l.PushBack(3)
l.RemoveAt(1)
l.ForEach(func(i int) bool {
t.Log(i)
return false
})
t.Log()
l.RemoveAt(0)
l.ForEach(func(i int) bool {
t.Log(i)
return false
})
}
func TestSize(t *testing.T) {
l := list.NewLinkedList[int]()
l.PushBack(1)
l.PushBack(2)
l.PushBack(3)
assert.Equal(t, 3, l.Size())
l.RemoveAt(0)
assert.Equal(t, 2, l.Size())
}
func TestLinkedListToSlice(t *testing.T) {
l := list.NewLinkedList[int]()
l.PushBack(1)
l.PushBack(2)
l.PushBack(3)
s := l.ToSlice()
t.Log(s)
}
func BenchmarkLinkedList(b *testing.B) {
l := list.NewLinkedList[int]()
l.Synchronize()
for i := 0; i < b.N; i++ {
l.PushBack(i)
}
}

35
collections/list/list.go Normal file
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@ -0,0 +1,35 @@
package list
import (
"errors"
"github.com/charlienet/go-mixed/locker"
)
var ErrorOutOffRange = errors.New("out of range")
type List[T any] interface {
}
type list[T any] struct {
size int
locker locker.RWLocker
}
func (l *list[T]) Synchronize() {
l.locker = locker.NewRWLocker()
}
func (l *list[T]) ForEach(fn func(T) bool) { panic("Not Implemented") }
func (l *LinkedList[T]) ToSlice() []T {
s := make([]T, 0, l.Size())
l.ForEach(func(t T) bool {
s = append(s, t)
return false
})
return s
}
func (l *list[T]) Size() int { return l.size }

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@ -7,17 +7,15 @@ import (
// MaxInt returns the larger one of v1 and v2.
func Max[T constraints.Ordered](v1, v2 T) T {
return expr.If(v1 > v2, v1, v2)
return expr.Ternary(v1 > v2, v1, v2)
}
// MinInt returns the smaller one of v1 and v2.
func Min[T constraints.Ordered](v1, v2 T) T {
return expr.If(v1 < v2, v1, v2)
return expr.Ternary(v1 < v2, v1, v2)
}
func abs(n int64) int64 {
func Abs(n int64) int64 {
y := n >> 63
return (n ^ y) - y
}