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97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package math
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import (
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"math/big"
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"sort"
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"github.com/ethereum/go-ethereum/common"
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)
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type Summer interface {
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Sum(i int) *big.Int
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Len() int
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}
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func Sum(slice Summer) (sum *big.Int) {
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sum = new(big.Int)
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for i := 0; i < slice.Len(); i++ {
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sum.Add(sum, slice.Sum(i))
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}
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return
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}
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type Vector struct {
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Gas, Price *big.Int
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}
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type VectorsBy func(v1, v2 Vector) bool
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func (self VectorsBy) Sort(vectors []Vector) {
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bs := vectorSorter{
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vectors: vectors,
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by: self,
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}
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sort.Sort(bs)
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}
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type vectorSorter struct {
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vectors []Vector
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by func(v1, v2 Vector) bool
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}
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func (v vectorSorter) Len() int { return len(v.vectors) }
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func (v vectorSorter) Less(i, j int) bool { return v.by(v.vectors[i], v.vectors[j]) }
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func (v vectorSorter) Swap(i, j int) { v.vectors[i], v.vectors[j] = v.vectors[j], v.vectors[i] }
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func PriceSort(v1, v2 Vector) bool { return v1.Price.Cmp(v2.Price) < 0 }
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func GasSort(v1, v2 Vector) bool { return v1.Gas.Cmp(v2.Gas) < 0 }
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type vectorSummer struct {
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vectors []Vector
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by func(v Vector) *big.Int
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}
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type VectorSum func(v Vector) *big.Int
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func (v VectorSum) Sum(vectors []Vector) *big.Int {
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vs := vectorSummer{
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vectors: vectors,
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by: v,
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}
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return Sum(vs)
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}
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func (v vectorSummer) Len() int { return len(v.vectors) }
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func (v vectorSummer) Sum(i int) *big.Int { return v.by(v.vectors[i]) }
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func GasSum(v Vector) *big.Int { return v.Gas }
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var etherInWei = new(big.Rat).SetInt(common.String2Big("1000000000000000000"))
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func GasPrice(bp, gl, ep *big.Int) *big.Int {
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BP := new(big.Rat).SetInt(bp)
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GL := new(big.Rat).SetInt(gl)
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EP := new(big.Rat).SetInt(ep)
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GP := new(big.Rat).Quo(BP, GL)
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GP = GP.Quo(GP, EP)
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return GP.Mul(GP, etherInWei).Num()
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}
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