Initial QSfera import
This commit is contained in:
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/vendor/
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+85
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||||
run:
|
||||
tests: false
|
||||
|
||||
linters:
|
||||
disable-all: true
|
||||
enable:
|
||||
- asciicheck
|
||||
- bidichk
|
||||
- bodyclose
|
||||
- containedctx
|
||||
- contextcheck
|
||||
- cyclop
|
||||
- deadcode
|
||||
- decorder
|
||||
- depguard
|
||||
- dogsled
|
||||
- dupl
|
||||
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|
||||
- errcheck
|
||||
- errchkjson
|
||||
- errname
|
||||
- errorlint
|
||||
- exhaustive
|
||||
- exportloopref
|
||||
- forbidigo
|
||||
- funlen
|
||||
- gci
|
||||
- gochecknoglobals
|
||||
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|
||||
- gocognit
|
||||
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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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|
||||
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|
||||
- goimports
|
||||
- gomnd
|
||||
- gomoddirectives
|
||||
- gomodguard
|
||||
- goprintffuncname
|
||||
- gosec
|
||||
- gosimple
|
||||
- govet
|
||||
- grouper
|
||||
- ifshort
|
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- importas
|
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- ineffassign
|
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- ireturn
|
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- lll
|
||||
- maintidx
|
||||
- makezero
|
||||
- misspell
|
||||
- nakedret
|
||||
- nestif
|
||||
- nilerr
|
||||
- nilnil
|
||||
- noctx
|
||||
- nolintlint
|
||||
- paralleltest
|
||||
- prealloc
|
||||
- predeclared
|
||||
- promlinter
|
||||
- revive
|
||||
- rowserrcheck
|
||||
- sqlclosecheck
|
||||
- staticcheck
|
||||
- structcheck
|
||||
- stylecheck
|
||||
- tagliatelle
|
||||
- tenv
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- testpackage
|
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- thelper
|
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- tparallel
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- typecheck
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- unconvert
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- unparam
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- unused
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- varcheck
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- varnamelen
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- wastedassign
|
||||
- whitespace
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- wrapcheck
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||||
+201
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|
||||
Apache License
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||||
Version 2.0, January 2004
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||||
http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+13
@@ -0,0 +1,13 @@
|
||||
.DEFAULT_GOAL := all
|
||||
|
||||
.PHONY: all
|
||||
all: test lint
|
||||
|
||||
# the TEST_FLAGS env var can be set to eg run only specific tests
|
||||
.PHONY: test
|
||||
test:
|
||||
go test -v -count=1 -race -cover "$$TEST_FLAGS"
|
||||
|
||||
.PHONY: lint
|
||||
lint:
|
||||
golangci-lint run
|
||||
+104
@@ -0,0 +1,104 @@
|
||||
[](https://app.circleci.com/pipelines/github/wk8/go-ordered-map)
|
||||
|
||||
# Goland Ordered Maps
|
||||
|
||||
Same as regular maps, but also remembers the order in which keys were inserted, akin to [Python's `collections.OrderedDict`s](https://docs.python.org/3.7/library/collections.html#ordereddict-objects).
|
||||
|
||||
It offers the following features:
|
||||
* optimal runtime performance (all operations are constant time)
|
||||
* optimal memory usage (only one copy of values, no unnecessary memory allocation)
|
||||
* allows iterating from newest or oldest keys indifferently, without memory copy, allowing to `break` the iteration, and in time linear to the number of keys iterated over rather than the total length of the ordered map
|
||||
* takes and returns generic `interface{}`s
|
||||
* idiomatic API, akin to that of [`container/list`](https://golang.org/pkg/container/list)
|
||||
|
||||
## Installation
|
||||
```bash
|
||||
go get -u github.com/wk8/go-ordered-map
|
||||
```
|
||||
|
||||
Or use your favorite golang vendoring tool!
|
||||
|
||||
## Supported go versions
|
||||
|
||||
All go versions >= 1.13 are supported. There's no reason for older versions to not also work, but they're not part of the build matrix.
|
||||
|
||||
## Documentation
|
||||
|
||||
[The full documentation is available on godoc.org](https://godoc.org/github.com/wk8/go-ordered-map).
|
||||
|
||||
## Example / usage
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/wk8/go-ordered-map"
|
||||
)
|
||||
|
||||
func main() {
|
||||
om := orderedmap.New()
|
||||
|
||||
om.Set("foo", "bar")
|
||||
om.Set("bar", "baz")
|
||||
om.Set("coucou", "toi")
|
||||
|
||||
fmt.Println(om.Get("foo")) // => bar, true
|
||||
fmt.Println(om.Get("i dont exist")) // => <nil>, false
|
||||
|
||||
// iterating pairs from oldest to newest:
|
||||
for pair := om.Oldest(); pair != nil; pair = pair.Next() {
|
||||
fmt.Printf("%s => %s\n", pair.Key, pair.Value)
|
||||
} // prints:
|
||||
// foo => bar
|
||||
// bar => baz
|
||||
// coucou => toi
|
||||
|
||||
// iterating over the 2 newest pairs:
|
||||
i := 0
|
||||
for pair := om.Newest(); pair != nil; pair = pair.Prev() {
|
||||
fmt.Printf("%s => %s\n", pair.Key, pair.Value)
|
||||
i++
|
||||
if i >= 2 {
|
||||
break
|
||||
}
|
||||
} // prints:
|
||||
// coucou => toi
|
||||
// bar => baz
|
||||
}
|
||||
```
|
||||
|
||||
All of `OrderedMap`'s methods accept and return `interface{}`s, so you can use any type of keys that regular `map`s accept, as well pack/unpack arbitrary values, e.g.:
|
||||
```go
|
||||
type myStruct struct {
|
||||
payload string
|
||||
}
|
||||
|
||||
func main() {
|
||||
om := orderedmap.New()
|
||||
|
||||
om.Set(12, &myStruct{"foo"})
|
||||
om.Set(1, &myStruct{"bar"})
|
||||
|
||||
value, present := om.Get(12)
|
||||
if !present {
|
||||
panic("should be there!")
|
||||
}
|
||||
fmt.Println(value.(*myStruct).payload) // => foo
|
||||
|
||||
for pair := om.Oldest(); pair != nil; pair = pair.Next() {
|
||||
fmt.Printf("%d => %s\n", pair.Key, pair.Value.(*myStruct).payload)
|
||||
} // prints:
|
||||
// 12 => foo
|
||||
// 1 => bar
|
||||
}
|
||||
```
|
||||
|
||||
## Alternatives
|
||||
|
||||
There are several other ordered map golang implementations out there, but I believe that at the time of writing none of them offer the same functionality as this library; more specifically:
|
||||
* [iancoleman/orderedmap](https://github.com/iancoleman/orderedmap) only accepts `string` keys, its `Delete` operations are linear
|
||||
* [cevaris/ordered_map](https://github.com/cevaris/ordered_map) uses a channel for iterations, and leaks goroutines if the iteration is interrupted before fully traversing the map
|
||||
* [mantyr/iterator](https://github.com/mantyr/iterator) also uses a channel for iterations, and its `Delete` operations are linear
|
||||
* [samdolan/go-ordered-map](https://github.com/samdolan/go-ordered-map) adds unnecessary locking (users should add their own locking instead if they need it), its `Delete` and `Get` operations are linear, iterations trigger a linear memory allocation
|
||||
+193
@@ -0,0 +1,193 @@
|
||||
// Package orderedmap implements an ordered map, i.e. a map that also keeps track of
|
||||
// the order in which keys were inserted.
|
||||
//
|
||||
// All operations are constant-time.
|
||||
//
|
||||
// Github repo: https://github.com/wk8/go-ordered-map
|
||||
//
|
||||
package orderedmap
|
||||
|
||||
import (
|
||||
"container/list"
|
||||
"fmt"
|
||||
)
|
||||
|
||||
type Pair struct {
|
||||
Key interface{}
|
||||
Value interface{}
|
||||
|
||||
element *list.Element
|
||||
}
|
||||
|
||||
type OrderedMap struct {
|
||||
pairs map[interface{}]*Pair
|
||||
list *list.List
|
||||
}
|
||||
|
||||
// New creates a new OrderedMap.
|
||||
func New() *OrderedMap {
|
||||
return &OrderedMap{
|
||||
pairs: make(map[interface{}]*Pair),
|
||||
list: list.New(),
|
||||
}
|
||||
}
|
||||
|
||||
// Get looks for the given key, and returns the value associated with it,
|
||||
// or nil if not found. The boolean it returns says whether the key is present in the map.
|
||||
func (om *OrderedMap) Get(key interface{}) (interface{}, bool) {
|
||||
if pair, present := om.pairs[key]; present {
|
||||
return pair.Value, present
|
||||
}
|
||||
return nil, false
|
||||
}
|
||||
|
||||
// Load is an alias for Get, mostly to present an API similar to `sync.Map`'s.
|
||||
func (om *OrderedMap) Load(key interface{}) (interface{}, bool) {
|
||||
return om.Get(key)
|
||||
}
|
||||
|
||||
// GetPair looks for the given key, and returns the pair associated with it,
|
||||
// or nil if not found. The Pair struct can then be used to iterate over the ordered map
|
||||
// from that point, either forward or backward.
|
||||
func (om *OrderedMap) GetPair(key interface{}) *Pair {
|
||||
return om.pairs[key]
|
||||
}
|
||||
|
||||
// Set sets the key-value pair, and returns what `Get` would have returned
|
||||
// on that key prior to the call to `Set`.
|
||||
func (om *OrderedMap) Set(key interface{}, value interface{}) (interface{}, bool) {
|
||||
if pair, present := om.pairs[key]; present {
|
||||
oldValue := pair.Value
|
||||
pair.Value = value
|
||||
return oldValue, true
|
||||
}
|
||||
|
||||
pair := &Pair{
|
||||
Key: key,
|
||||
Value: value,
|
||||
}
|
||||
pair.element = om.list.PushBack(pair)
|
||||
om.pairs[key] = pair
|
||||
|
||||
return nil, false
|
||||
}
|
||||
|
||||
// Store is an alias for Set, mostly to present an API similar to `sync.Map`'s.
|
||||
func (om *OrderedMap) Store(key interface{}, value interface{}) (interface{}, bool) {
|
||||
return om.Set(key, value)
|
||||
}
|
||||
|
||||
// Delete removes the key-value pair, and returns what `Get` would have returned
|
||||
// on that key prior to the call to `Delete`.
|
||||
func (om *OrderedMap) Delete(key interface{}) (interface{}, bool) {
|
||||
if pair, present := om.pairs[key]; present {
|
||||
om.list.Remove(pair.element)
|
||||
delete(om.pairs, key)
|
||||
return pair.Value, true
|
||||
}
|
||||
return nil, false
|
||||
}
|
||||
|
||||
// Len returns the length of the ordered map.
|
||||
func (om *OrderedMap) Len() int {
|
||||
return len(om.pairs)
|
||||
}
|
||||
|
||||
// Oldest returns a pointer to the oldest pair. It's meant to be used to iterate on the ordered map's
|
||||
// pairs from the oldest to the newest, e.g.:
|
||||
// for pair := orderedMap.Oldest(); pair != nil; pair = pair.Next() { fmt.Printf("%v => %v\n", pair.Key, pair.Value) }
|
||||
func (om *OrderedMap) Oldest() *Pair {
|
||||
return listElementToPair(om.list.Front())
|
||||
}
|
||||
|
||||
// Newest returns a pointer to the newest pair. It's meant to be used to iterate on the ordered map's
|
||||
// pairs from the newest to the oldest, e.g.:
|
||||
// for pair := orderedMap.Oldest(); pair != nil; pair = pair.Next() { fmt.Printf("%v => %v\n", pair.Key, pair.Value) }
|
||||
func (om *OrderedMap) Newest() *Pair {
|
||||
return listElementToPair(om.list.Back())
|
||||
}
|
||||
|
||||
// Next returns a pointer to the next pair.
|
||||
func (p *Pair) Next() *Pair {
|
||||
return listElementToPair(p.element.Next())
|
||||
}
|
||||
|
||||
// Previous returns a pointer to the previous pair.
|
||||
func (p *Pair) Prev() *Pair {
|
||||
return listElementToPair(p.element.Prev())
|
||||
}
|
||||
|
||||
func listElementToPair(element *list.Element) *Pair {
|
||||
if element == nil {
|
||||
return nil
|
||||
}
|
||||
return element.Value.(*Pair)
|
||||
}
|
||||
|
||||
// KeyNotFoundError may be returned by functions in this package when they're called with keys that are not present
|
||||
// in the map.
|
||||
type KeyNotFoundError struct {
|
||||
MissingKey interface{}
|
||||
}
|
||||
|
||||
var _ error = &KeyNotFoundError{}
|
||||
|
||||
func (e *KeyNotFoundError) Error() string {
|
||||
return fmt.Sprintf("missing key: %v", e.MissingKey)
|
||||
}
|
||||
|
||||
// MoveAfter moves the value associated with key to its new position after the one associated with markKey.
|
||||
// Returns an error iff key or markKey are not present in the map.
|
||||
func (om *OrderedMap) MoveAfter(key, markKey interface{}) error {
|
||||
elements, err := om.getElements(key, markKey)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
om.list.MoveAfter(elements[0], elements[1])
|
||||
return nil
|
||||
}
|
||||
|
||||
// MoveBefore moves the value associated with key to its new position before the one associated with markKey.
|
||||
// Returns an error iff key or markKey are not present in the map.
|
||||
func (om *OrderedMap) MoveBefore(key, markKey interface{}) error {
|
||||
elements, err := om.getElements(key, markKey)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
om.list.MoveBefore(elements[0], elements[1])
|
||||
return nil
|
||||
}
|
||||
|
||||
func (om *OrderedMap) getElements(keys ...interface{}) ([]*list.Element, error) {
|
||||
elements := make([]*list.Element, len(keys))
|
||||
for i, k := range keys {
|
||||
pair, present := om.pairs[k]
|
||||
if !present {
|
||||
return nil, &KeyNotFoundError{k}
|
||||
}
|
||||
elements[i] = pair.element
|
||||
}
|
||||
return elements, nil
|
||||
}
|
||||
|
||||
// MoveToBack moves the value associated with key to the back of the ordered map.
|
||||
// Returns an error iff key is not present in the map.
|
||||
func (om *OrderedMap) MoveToBack(key interface{}) error {
|
||||
pair, present := om.pairs[key]
|
||||
if !present {
|
||||
return &KeyNotFoundError{key}
|
||||
}
|
||||
om.list.MoveToBack(pair.element)
|
||||
return nil
|
||||
}
|
||||
|
||||
// MoveToFront moves the value associated with key to the front of the ordered map.
|
||||
// Returns an error iff key is not present in the map.
|
||||
func (om *OrderedMap) MoveToFront(key interface{}) error {
|
||||
pair, present := om.pairs[key]
|
||||
if !present {
|
||||
return &KeyNotFoundError{key}
|
||||
}
|
||||
om.list.MoveToFront(pair.element)
|
||||
return nil
|
||||
}
|
||||
Reference in New Issue
Block a user