56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package test
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import (
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"sync"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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)
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// hashPool is a test helper, that allows random hashes to be referred to by integers
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type TestHashPool struct {
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intToHash
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hashToInt
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lock sync.Mutex
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}
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func NewHashPool() *TestHashPool {
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return &TestHashPool{intToHash: make(intToHash), hashToInt: make(hashToInt)}
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}
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type intToHash map[int]common.Hash
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type hashToInt map[common.Hash]int
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func newHash(i int) common.Hash {
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return common.BytesToHash(crypto.Sha3([]byte(string(i))))
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}
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func (self *TestHashPool) IndexesToHashes(indexes []int) (hashes []common.Hash) {
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self.lock.Lock()
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defer self.lock.Unlock()
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for _, i := range indexes {
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hash, found := self.intToHash[i]
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if !found {
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hash = newHash(i)
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self.intToHash[i] = hash
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self.hashToInt[hash] = i
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}
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hashes = append(hashes, hash)
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}
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return
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}
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func (self *TestHashPool) HashesToIndexes(hashes []common.Hash) (indexes []int) {
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self.lock.Lock()
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defer self.lock.Unlock()
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for _, hash := range hashes {
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i, found := self.hashToInt[hash]
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if !found {
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i = -1
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}
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indexes = append(indexes, i)
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}
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return
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}
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