forked from cerc-io/plugeth
9effd64290
* core, eth, trie: bloom filter for trie node dedup during fast sync * eth/downloader, trie: address review comments * core, ethdb, trie: restart fast-sync bloom construction now and again * eth/downloader: initialize fast sync bloom on startup * eth: reenable eth/62 until we properly remove it
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
//
|
|
// Package hamming distance calculations in Go
|
|
//
|
|
// https://github.com/steakknife/hamming
|
|
//
|
|
// Copyright © 2014, 2015, 2016, 2018 Barry Allard
|
|
//
|
|
// MIT license
|
|
//
|
|
package hamming
|
|
|
|
import "strconv"
|
|
|
|
// HasPopCnt returns true if *PopCnt functions are callable
|
|
func HasPopCnt() (ret bool)
|
|
|
|
// CountBitsInt8PopCnt count 1's in x
|
|
func CountBitsInt8PopCnt(x int8) (ret int)
|
|
|
|
// CountBitsInt16PopCnt count 1's in x
|
|
func CountBitsInt16PopCnt(x int16) (ret int)
|
|
|
|
// CountBitsInt32PopCnt count 1's in x
|
|
func CountBitsInt32PopCnt(x int32) (ret int)
|
|
|
|
// CountBitsInt64PopCnt count 1's in x
|
|
func CountBitsInt64PopCnt(x int64) (ret int)
|
|
|
|
// CountBitsIntPopCnt count 1's in x
|
|
func CountBitsIntPopCnt(x int) int {
|
|
if strconv.IntSize == 64 {
|
|
return CountBitsInt64PopCnt(int64(x))
|
|
} else if strconv.IntSize == 32 {
|
|
return CountBitsInt32PopCnt(int32(x))
|
|
}
|
|
panic("strconv.IntSize must be 32 or 64")
|
|
}
|
|
|
|
// CountBitsUint8PopCnt count 1's in x
|
|
func CountBitsUint8PopCnt(x uint8) (ret int)
|
|
|
|
// CountBitsUint16PopCnt count 1's in x
|
|
func CountBitsUint16PopCnt(x uint16) (ret int)
|
|
|
|
// CountBitsUint32PopCnt count 1's in x
|
|
func CountBitsUint32PopCnt(x uint32) (ret int)
|
|
|
|
// CountBitsUint64PopCnt count 1's in x
|
|
func CountBitsUint64PopCnt(x uint64) (ret int)
|
|
|
|
// CountBitsUintPopCnt count 1's in x
|
|
func CountBitsUintPopCnt(x uint) int {
|
|
if strconv.IntSize == 64 {
|
|
return CountBitsUint64PopCnt(uint64(x))
|
|
} else if strconv.IntSize == 32 {
|
|
return CountBitsUint32PopCnt(uint32(x))
|
|
}
|
|
panic("strconv.IntSize must be 32 or 64")
|
|
}
|
|
|
|
// CountBitsBytePopCnt count 1's in x
|
|
func CountBitsBytePopCnt(x byte) (ret int)
|
|
|
|
// CountBitsRunePopCnt count 1's in x
|
|
func CountBitsRunePopCnt(x rune) (ret int)
|