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xxHash framework in Swift.
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xxHash-Swift.podspec

README.md


Platform Language Swift%205.0 CocoaPods Carthage compatible SwiftPM compatible Build Status

Introduction

xxHash framework in Swift.
A framework includes XXH32/XXH64/XXH3-64/XXH3-128 functions.

Original xxHash algorithm created by Yann Collet.

Documentation

Requirements

  • Platforms
    • iOS 10.0+
    • macOS 10.12+
    • tvOS 12.0+
    • Linux
  • Swift 5.0

Installation

Carthage

github "daisuke-t-jp/xxHash-Swift"

CocoaPods

use_frameworks!

target 'target' do
pod 'xxHash-Swift'
end

Swift Package Manager

import PackageDescription

let package = Package(
  name: "YOUR_PACKAGE_NAME",
  dependencies: [
    .package(url: "https://github.com/daisuke-t-jp/xxHash-Swift.git", from: "1.0.12")
  ],
  targets: [
    .target(
      name: "YOUR_TARGET_NAME",
      dependencies: ["xxHash-Swift"]),
  ]
)

Usage

Import framework

import xxHash_Swift

XXH32

Generate digest(One-shot)

let digest = XXH32.digest("123456789ABCDEF")
// digest -> 0x576e3cf9

// Using seed.
let digest = XXH32.digest("123456789ABCDEF", seed: 0x7fffffff)
// digest -> 0xa7f06f9d

Generate digest(Streaming)

// Create xxHash instance
let xxh = XXH32() // if using seed, e.g. "XXH32(0x7fffffff)"

// Get data from file
let bundle = Bundle(for: type(of: self))
let path = bundle.path(forResource: "alice29", ofType: "txt")!
let data = NSData(contentsOfFile: path)! as Data

let bufSize = 1024
var index = 0

repeat {
  var lastIndex = index + bufSize
  if lastIndex > data.count {
    lastIndex = index + data.count - index
  }

  let data2 = data[index..<lastIndex]
  xxh.update(data2) // xxHash update

  index += data2.count
  if index >= data.count {
    break
  }
} while(true)

let digest = xxh.digest()
// digest -> 0xafc8e0c2

XXH64

Generate digest(One-shot)

let digest = XXH64.digest("123456789ABCDEF")
// digest -> 0xa66df83f00e9202d

// Using seed.
let digest = XXH64.digest("123456789ABCDEF", seed: 0x000000007fffffff)
// digest -> 0xe8d84202a16e482f

Generate digest(Streaming)

// Create xxHash instance
let xxh = XXH64() // if using seed, e.g. "XXH64(0x000000007fffffff)"

// Get data from file
let bundle = Bundle(for: type(of: self))
let path = bundle.path(forResource: "alice29", ofType: "txt")!
let data = NSData(contentsOfFile: path)! as Data

let bufSize = 1024
var index = 0

repeat {
  var lastIndex = index + bufSize
  if lastIndex > data.count {
    lastIndex = index + data.count - index
  }

  let data2 = data[index..<lastIndex]
  xxh.update(data2) // xxHash update

  index += data2.count
  if index >= data.count {
    break
  }
} while(true)

let digest = xxh.digest()
// digest -> 0x843c2c4ccfbfb749

XXH3-64

Generate digest(One-shot)

let digest = XXH3.digest64("123456789ABCDEF")
// digest -> 0xfb28db77f56706e8

// Using seed.
let digest = XXH3.digest64("123456789ABCDEF", seed: 0x000000007fffffff)
// digest -> 0xced1ef1da8aa95ae

XXH3-128

Generate digest(One-shot)

let digest = XXH3.digest128("123456789ABCDEF")
// digest[0] -> 0x208cfe2ef00d2aaa
// digest[1] -> 0x9b72015eec4abbf3

// Using seed.
let digest = XXH3.digest128("123456789ABCDEF", seed: 0x000000007fffffff)
// digest[0] -> 0x50554db504518e64
// digest[1] -> 0xc8fb00b18f99658c

Demo

There are demos.

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