77 lines
2.1 KiB
Haxe
77 lines
2.1 KiB
Haxe
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/*
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* Copyright (C)2005-2019 Haxe Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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package haxe.crypto;
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/**
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Calculates the Adler32 of the given Bytes.
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*/
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class Adler32 {
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var a1:Int;
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var a2:Int;
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public function new() {
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a1 = 1;
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a2 = 0;
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}
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public function get() {
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return (a2 << 16) | a1;
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}
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public function update(b:haxe.io.Bytes, pos, len) {
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var a1 = a1, a2 = a2;
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for (p in pos...pos + len) {
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var c = b.get(p);
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a1 = (a1 + c) % 65521;
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a2 = (a2 + a1) % 65521;
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}
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this.a1 = a1;
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this.a2 = a2;
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}
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public function equals(a:Adler32) {
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return a.a1 == a1 && a.a2 == a2;
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}
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public function toString() {
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return StringTools.hex(a2, 8) + StringTools.hex(a1, 8);
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}
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public static function read(i:haxe.io.Input) {
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var a = new Adler32();
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var a2a = i.readByte();
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var a2b = i.readByte();
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var a1a = i.readByte();
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var a1b = i.readByte();
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a.a1 = (a1a << 8) | a1b;
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a.a2 = (a2a << 8) | a2b;
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return a;
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}
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public static function make(b:haxe.io.Bytes) {
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var a = new Adler32();
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a.update(b, 0, b.length);
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return a.get();
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}
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}
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