mirror of
https://github.com/42wim/matterbridge.git
synced 2024-11-22 10:42:02 -08:00
39 lines
693 B
Go
39 lines
693 B
Go
|
// Copyright 2013 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// +build !go1.2
|
||
|
|
|
||
|
|
package language
|
||
|
|
|
||
|
|
import "sort"
|
||
|
|
|
||
|
|
func sortStable(s sort.Interface) {
|
||
|
|
ss := stableSort{
|
||
|
|
s: s,
|
||
|
|
pos: make([]int, s.Len()),
|
||
|
|
}
|
||
|
|
for i := range ss.pos {
|
||
|
|
ss.pos[i] = i
|
||
|
|
}
|
||
|
|
sort.Sort(&ss)
|
||
|
|
}
|
||
|
|
|
||
|
|
type stableSort struct {
|
||
|
|
s sort.Interface
|
||
|
|
pos []int
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *stableSort) Len() int {
|
||
|
|
return len(s.pos)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *stableSort) Less(i, j int) bool {
|
||
|
|
return s.s.Less(i, j) || !s.s.Less(j, i) && s.pos[i] < s.pos[j]
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *stableSort) Swap(i, j int) {
|
||
|
|
s.s.Swap(i, j)
|
||
|
|
s.pos[i], s.pos[j] = s.pos[j], s.pos[i]
|
||
|
|
}
|