Big Change Update

uBlock0.chromium/lib/lz4/lz4-block-codec-any.js

@@ -0,0 +1,151 @@
+/*******************************************************************************
+
+    lz4-block-codec-any.js
+        A wrapper to instantiate a wasm- and/or js-based LZ4 block
+        encoder/decoder.
+    Copyright (C) 2018 Raymond Hill
+
+    BSD-2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above
+    copyright notice, this list of conditions and the following disclaimer
+    in the documentation and/or other materials provided with the
+    distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    Home: https://github.com/gorhill/lz4-wasm
+
+    I used the same license as the one picked by creator of LZ4 out of respect
+    for his creation, see https://lz4.github.io/lz4/
+
+*/
+
+'use strict';
+
+/******************************************************************************/
+
+(function(context) {                    // >>>> Start of private namespace
+
+/******************************************************************************/
+
+const wd = (function() {
+    let url = document.currentScript.src;
+    let match = /[^\/]+$/.exec(url);
+    return match !== null ?
+        url.slice(0, match.index) :
+        '';
+})();
+
+const removeScript = function(script) {
+    if ( !script ) { return; }
+    if ( script.parentNode === null ) { return; }
+    script.parentNode.removeChild(script);
+};
+
+const createInstanceWASM = function() {
+    if ( context.LZ4BlockWASM instanceof Function ) {
+        const instance = new context.LZ4BlockWASM();
+        return instance.init().then(ok => ok ? instance : null);
+    }
+    if ( context.LZ4BlockWASM === null ) {
+        return Promise.resolve(null);
+    }
+    return new Promise(resolve => {
+        const script = document.createElement('script');
+        script.src = wd + 'lz4-block-codec-wasm.js';
+        script.addEventListener('load', ( ) => {
+            if ( context.LZ4BlockWASM instanceof Function === false ) {
+                context.LZ4BlockWASM = null;
+                resolve(null);
+                return;
+            }
+            const instance = new context.LZ4BlockWASM();
+            instance.init().then(ok => { resolve(ok ? instance : null); });
+        });
+        script.addEventListener('error', ( ) => {
+            context.LZ4BlockWASM = null;
+            resolve(null);
+        });
+        document.head.appendChild(script);
+        removeScript(script);
+    });
+};
+
+const createInstanceJS = function() {
+    if ( context.LZ4BlockJS instanceof Function ) {
+        const instance = new context.LZ4BlockJS();
+        return instance.init().then(ok => ok ? instance : null);
+    }
+    if ( context.LZ4BlockJS === null ) {
+        return Promise.resolve(null);
+    }
+    return new Promise(resolve => {
+        const script = document.createElement('script');
+        script.src = wd + 'lz4-block-codec-js.js';
+        script.addEventListener('load', ( ) => {
+            if ( context.LZ4BlockJS instanceof Function === false ) {
+                context.LZ4BlockJS = null;
+                resolve(null);
+                return;
+            }
+            const instance = new context.LZ4BlockJS();
+            instance.init().then(ok => { resolve(ok ? instance : null); });
+        });
+        script.addEventListener('error', ( ) => {
+            context.LZ4BlockJS = null;
+            resolve(null);
+        });
+        document.head.appendChild(script);
+        removeScript(script);
+    });
+};
+
+/******************************************************************************/
+
+context.lz4BlockCodec = {
+    createInstance: function(flavor) {
+        let instantiator;
+        if ( flavor === 'wasm' ) {
+            instantiator = createInstanceWASM;
+        } else if ( flavor === 'js' ) {
+            instantiator = createInstanceJS;
+        } else {
+            instantiator = createInstanceWASM || createInstanceJS;
+        }
+        return (instantiator)().then(instance => {
+            if ( instance ) { return instance; }
+            if ( flavor === undefined ) {
+                return createInstanceJS();
+            }
+            return null;
+        });
+    },
+    reset: function() {
+        context.LZ4BlockWASM = undefined;
+        context.LZ4BlockJS = undefined;
+    }
+};
+
+/******************************************************************************/
+
+})(this || self);                       // <<<< End of private namespace
+
+/******************************************************************************/