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5f7826270c
* common/math: optimize PaddedBigBytes, use it more
name old time/op new time/op delta
PaddedBigBytes-8 71.1ns ± 5% 46.1ns ± 1% -35.15% (p=0.000 n=20+19)
name old alloc/op new alloc/op delta
PaddedBigBytes-8 48.0B ± 0% 32.0B ± 0% -33.33% (p=0.000 n=20+20)
* all: unify big.Int zero checks
Various checks were in use. This commit replaces them all with Int.Sign,
which is cheaper and less code.
eg templates:
func before(x *big.Int) bool { return x.BitLen() == 0 }
func after(x *big.Int) bool { return x.Sign() == 0 }
func before(x *big.Int) bool { return x.BitLen() > 0 }
func after(x *big.Int) bool { return x.Sign() != 0 }
func before(x *big.Int) int { return x.Cmp(common.Big0) }
func after(x *big.Int) int { return x.Sign() }
* common/math, crypto/secp256k1: make ReadBits public in package math
67 lines
2.2 KiB
Go
67 lines
2.2 KiB
Go
// Copyright 2016 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 abi
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import (
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"reflect"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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)
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// packBytesSlice packs the given bytes as [L, V] as the canonical representation
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// bytes slice
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func packBytesSlice(bytes []byte, l int) []byte {
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len := packNum(reflect.ValueOf(l))
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return append(len, common.RightPadBytes(bytes, (l+31)/32*32)...)
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}
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// packElement packs the given reflect value according to the abi specification in
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// t.
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func packElement(t Type, reflectValue reflect.Value) []byte {
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switch t.T {
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case IntTy, UintTy:
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return packNum(reflectValue)
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case StringTy:
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return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len())
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case AddressTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return common.LeftPadBytes(reflectValue.Bytes(), 32)
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case BoolTy:
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if reflectValue.Bool() {
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return math.PaddedBigBytes(common.Big1, 32)
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} else {
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return math.PaddedBigBytes(common.Big0, 32)
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}
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case BytesTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return packBytesSlice(reflectValue.Bytes(), reflectValue.Len())
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case FixedBytesTy, FunctionTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return common.RightPadBytes(reflectValue.Bytes(), 32)
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}
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panic("abi: fatal error")
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}
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