whisper/sort.go


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package whisper

import (
    "sort"

    "github.com/ethereum/go-ethereum/common"
)

type sortedKeys struct {
    k []int32
}

func (self *sortedKeys) Len() int           { return len(self.k) }
func (self *sortedKeys) Less(i, j int) bool { return self.k[i] < self.k[j] }
func (self *sortedKeys) Swap(i, j int)      { self.k[i], self.k[j] = self.k[j], self.k[i] }

func sortKeys(m map[int32]common.Hash) []int32 {
    sorted := new(sortedKeys)
    sorted.k = make([]int32, len(m))
    i := 0
    for key, _ := range m {
        sorted.k[i] = key
        i++
    }

    sort.Sort(sorted)

    return sorted.k
}