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author | Péter Szilágyi <peterke@gmail.com> | 2018-02-28 00:25:56 +0800 |
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committer | Péter Szilágyi <peterke@gmail.com> | 2018-02-28 00:25:56 +0800 |
commit | 17b0e226d3d6b3829a82ee1c142bd125cc9a0109 (patch) | |
tree | cbb284467bb1f59d8397c2430ab34722a05c4478 /consensus/ethash/algorithm_go1.8.go | |
parent | b574b5776695eb30e034fd8c7a468b3f03d4c6b9 (diff) | |
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travis, build, consensus: drop support for Go 1.7
Diffstat (limited to 'consensus/ethash/algorithm_go1.8.go')
-rw-r--r-- | consensus/ethash/algorithm_go1.8.go | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/consensus/ethash/algorithm_go1.8.go b/consensus/ethash/algorithm_go1.8.go deleted file mode 100644 index 975fdffe5..000000000 --- a/consensus/ethash/algorithm_go1.8.go +++ /dev/null @@ -1,63 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -// +build go1.8 - -package ethash - -import "math/big" - -// cacheSize returns the size of the ethash verification cache that belongs to a certain -// block number. -func cacheSize(block uint64) uint64 { - epoch := int(block / epochLength) - if epoch < maxEpoch { - return cacheSizes[epoch] - } - return calcCacheSize(epoch) -} - -// calcCacheSize calculates the cache size for epoch. The cache size grows linearly, -// however, we always take the highest prime below the linearly growing threshold in order -// to reduce the risk of accidental regularities leading to cyclic behavior. -func calcCacheSize(epoch int) uint64 { - size := cacheInitBytes + cacheGrowthBytes*uint64(epoch) - hashBytes - for !new(big.Int).SetUint64(size / hashBytes).ProbablyPrime(1) { // Always accurate for n < 2^64 - size -= 2 * hashBytes - } - return size -} - -// datasetSize returns the size of the ethash mining dataset that belongs to a certain -// block number. -func datasetSize(block uint64) uint64 { - epoch := int(block / epochLength) - if epoch < maxEpoch { - return datasetSizes[epoch] - } - return calcDatasetSize(epoch) -} - -// calcDatasetSize calculates the dataset size for epoch. The dataset size grows linearly, -// however, we always take the highest prime below the linearly growing threshold in order -// to reduce the risk of accidental regularities leading to cyclic behavior. -func calcDatasetSize(epoch int) uint64 { - size := datasetInitBytes + datasetGrowthBytes*uint64(epoch) - mixBytes - for !new(big.Int).SetUint64(size / mixBytes).ProbablyPrime(1) { // Always accurate for n < 2^64 - size -= 2 * mixBytes - } - return size -} |