mirror of
https://github.com/gorhill/uBlock.git
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Convert HNTrie code to ES6 class
This commit is contained in:
Raymond Hill
parent
155abfba18
commit
e0d2285da0
184
src/js/hntrie.js
184
src/js/hntrie.js
@ -123,43 +123,42 @@ const HNTRIE_CHAR0_SLOT = HNTRIE_TRIE0_SLOT + 2; // 66 / 264
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const HNTRIE_CHAR1_SLOT = HNTRIE_TRIE0_SLOT + 3; // 67 / 268
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const HNTRIE_TRIE0_START = HNTRIE_TRIE0_SLOT + 4 << 2; // 272
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const HNTrieContainer = class {
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const HNTrieContainer = function(details) {
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if ( details instanceof Object === false ) { details = {}; }
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let len = (details.byteLength || 0) + HNTRIE_PAGE_SIZE-1 & ~(HNTRIE_PAGE_SIZE-1);
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this.buf = new Uint8Array(Math.max(len, 131072));
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this.buf32 = new Uint32Array(this.buf.buffer);
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this.needle = '';
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this.buf32[HNTRIE_TRIE0_SLOT] = HNTRIE_TRIE0_START;
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this.buf32[HNTRIE_TRIE1_SLOT] = this.buf32[HNTRIE_TRIE0_SLOT];
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this.buf32[HNTRIE_CHAR0_SLOT] = details.char0 || 65536;
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this.buf32[HNTRIE_CHAR1_SLOT] = this.buf32[HNTRIE_CHAR0_SLOT];
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this.wasmInstancePromise = null;
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this.wasmMemory = null;
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this.readyToUse();
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};
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HNTrieContainer.prototype = {
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constructor(details) {
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if ( details instanceof Object === false ) { details = {}; }
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let len = (details.byteLength || 0) + HNTRIE_PAGE_SIZE-1 & ~(HNTRIE_PAGE_SIZE-1);
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this.buf = new Uint8Array(Math.max(len, 131072));
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this.buf32 = new Uint32Array(this.buf.buffer);
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this.needle = '';
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this.buf32[HNTRIE_TRIE0_SLOT] = HNTRIE_TRIE0_START;
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this.buf32[HNTRIE_TRIE1_SLOT] = this.buf32[HNTRIE_TRIE0_SLOT];
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this.buf32[HNTRIE_CHAR0_SLOT] = details.char0 || 65536;
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this.buf32[HNTRIE_CHAR1_SLOT] = this.buf32[HNTRIE_CHAR0_SLOT];
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this.wasmInstancePromise = null;
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this.wasmMemory = null;
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this.readyToUse();
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}
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//--------------------------------------------------------------------------
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// Public methods
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//--------------------------------------------------------------------------
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reset: function() {
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reset() {
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this.buf32[HNTRIE_TRIE1_SLOT] = this.buf32[HNTRIE_TRIE0_SLOT];
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this.buf32[HNTRIE_CHAR1_SLOT] = this.buf32[HNTRIE_CHAR0_SLOT];
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},
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}
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readyToUse: function() {
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readyToUse() {
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if ( HNTrieContainer.wasmModulePromise instanceof Promise === false ) {
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return Promise.resolve();
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}
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return HNTrieContainer.wasmModulePromise.then(
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module => this.initWASM(module)
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);
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},
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}
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setNeedle: function(needle) {
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setNeedle(needle) {
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if ( needle !== this.needle ) {
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const buf = this.buf;
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let i = needle.length;
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@ -171,9 +170,9 @@ HNTrieContainer.prototype = {
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this.needle = needle;
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}
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return this;
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},
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}
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matchesJS: function(iroot) {
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matchesJS(iroot) {
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const char0 = this.buf32[HNTRIE_CHAR0_SLOT];
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let ineedle = this.buf[255];
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let icell = iroot;
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@ -214,11 +213,9 @@ HNTrieContainer.prototype = {
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}
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}
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return ineedle === 0 || this.buf[ineedle-1] === 0x2E ? ineedle : -1;
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},
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matchesWASM: null,
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matches: null,
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}
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createOne: function(args) {
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createOne(args) {
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if ( Array.isArray(args) ) {
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return new this.HNTrieRef(this, args[0], args[1]);
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}
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@ -232,13 +229,13 @@ HNTrieContainer.prototype = {
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this.buf32[iroot+1] = 0;
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this.buf32[iroot+2] = 0;
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return new this.HNTrieRef(this, iroot, 0);
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},
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}
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compileOne: function(trieRef) {
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compileOne(trieRef) {
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return [ trieRef.iroot, trieRef.size ];
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},
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}
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addJS: function(iroot) {
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addJS(iroot) {
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let lhnchar = this.buf[255];
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if ( lhnchar === 0 ) { return 0; }
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let icell = iroot;
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@ -334,28 +331,26 @@ HNTrieContainer.prototype = {
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}
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return 1;
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}
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},
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addWASM: null,
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add: null,
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}
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optimize: function() {
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optimize() {
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this.shrinkBuf();
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return {
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byteLength: this.buf.byteLength,
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char0: this.buf32[HNTRIE_CHAR0_SLOT],
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};
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},
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}
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fromIterable: function(hostnames, add) {
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fromIterable(hostnames, add) {
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if ( add === undefined ) { add = 'add'; }
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const trieRef = this.createOne();
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for ( const hn of hostnames ) {
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trieRef[add](hn);
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}
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return trieRef;
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},
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}
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serialize: function(encoder) {
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serialize(encoder) {
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if ( encoder instanceof Object ) {
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return encoder.encode(
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this.buf32.buffer,
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@ -369,9 +364,9 @@ HNTrieContainer.prototype = {
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this.buf32[HNTRIE_CHAR1_SLOT] + 3 >>> 2
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)
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);
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},
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}
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unserialize: function(selfie, decoder) {
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unserialize(selfie, decoder) {
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this.needle = '';
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const shouldDecode = typeof selfie === 'string';
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let byteLength = shouldDecode
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@ -397,25 +392,13 @@ HNTrieContainer.prototype = {
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this.buf32.set(selfie);
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}
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return true;
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},
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//--------------------------------------------------------------------------
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// Class to hold reference to a specific trie
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//--------------------------------------------------------------------------
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HNTrieRef: function(container, iroot, size) {
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this.container = container;
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this.iroot = iroot;
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this.size = size;
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this.last = -1;
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this.needle = '';
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},
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}
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//--------------------------------------------------------------------------
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// Private methods
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//--------------------------------------------------------------------------
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addCell: function(idown, iright, v) {
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addCell(idown, iright, v) {
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let icell = this.buf32[HNTRIE_TRIE1_SLOT];
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this.buf32[HNTRIE_TRIE1_SLOT] = icell + 12;
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icell >>>= 2;
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@ -423,9 +406,9 @@ HNTrieContainer.prototype = {
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this.buf32[icell+1] = iright;
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this.buf32[icell+2] = v;
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return icell;
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},
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}
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addSegment: function(lsegchar) {
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addSegment(lsegchar) {
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if ( lsegchar === 0 ) { return 0; }
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let char1 = this.buf32[HNTRIE_CHAR1_SLOT];
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const isegchar = char1 - this.buf32[HNTRIE_CHAR0_SLOT];
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@ -435,9 +418,9 @@ HNTrieContainer.prototype = {
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} while ( i !== 0 );
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this.buf32[HNTRIE_CHAR1_SLOT] = char1;
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return (lsegchar << 24) | isegchar;
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},
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}
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growBuf: function(trieGrow, charGrow) {
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growBuf(trieGrow, charGrow) {
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const char0 = Math.max(
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(this.buf32[HNTRIE_TRIE1_SLOT] + trieGrow + HNTRIE_PAGE_SIZE-1) & ~(HNTRIE_PAGE_SIZE-1),
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this.buf32[HNTRIE_CHAR0_SLOT]
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@ -448,18 +431,18 @@ HNTrieContainer.prototype = {
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this.buf.length
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);
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this.resizeBuf(bufLen, char0);
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},
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}
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shrinkBuf: function() {
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shrinkBuf() {
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// Can't shrink WebAssembly.Memory
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if ( this.wasmMemory !== null ) { return; }
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const char0 = this.buf32[HNTRIE_TRIE1_SLOT] + 24;
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const char1 = char0 + this.buf32[HNTRIE_CHAR1_SLOT] - this.buf32[HNTRIE_CHAR0_SLOT];
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const bufLen = char1 + 256;
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this.resizeBuf(bufLen, char0);
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},
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}
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resizeBuf: function(bufLen, char0) {
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resizeBuf(bufLen, char0) {
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bufLen = bufLen + HNTRIE_PAGE_SIZE-1 & ~(HNTRIE_PAGE_SIZE-1);
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if (
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bufLen === this.buf.length &&
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@ -510,9 +493,9 @@ HNTrieContainer.prototype = {
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this.buf32[HNTRIE_CHAR0_SLOT] = char0;
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this.buf32[HNTRIE_CHAR1_SLOT] = char0 + charDataLen;
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}
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},
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}
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initWASM: function(module) {
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initWASM(module) {
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if ( module instanceof WebAssembly.Module === false ) {
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return Promise.resolve(null);
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}
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@ -529,9 +512,10 @@ HNTrieContainer.prototype = {
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);
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this.wasmInstancePromise.then(instance => {
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this.wasmMemory = memory;
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const pageCount = this.buf.byteLength + HNTRIE_PAGE_SIZE-1 >>> 16;
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if ( pageCount > 1 ) {
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memory.grow(pageCount - 1);
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const curPageCount = memory.buffer.byteLength >>> 16;
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const newPageCount = this.buf.byteLength + HNTRIE_PAGE_SIZE-1 >>> 16;
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if ( newPageCount > curPageCount ) {
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memory.grow(newPageCount - curPageCount);
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}
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const buf = new Uint8Array(memory.buffer);
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buf.set(this.buf);
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@ -542,13 +526,30 @@ HNTrieContainer.prototype = {
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});
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}
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return this.wasmInstancePromise;
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},
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}
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};
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/******************************************************************************/
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HNTrieContainer.prototype.matches = HNTrieContainer.prototype.matchesJS;
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HNTrieContainer.prototype.matchesWASM = null;
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HNTrieContainer.prototype.HNTrieRef.prototype = {
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add: function(hn) {
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HNTrieContainer.prototype.add = HNTrieContainer.prototype.addJS;
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HNTrieContainer.prototype.addWASM = null;
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/*******************************************************************************
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Class to hold reference to a specific trie
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*/
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HNTrieContainer.prototype.HNTrieRef = class {
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constructor(container, iroot, size) {
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this.container = container;
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this.iroot = iroot;
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this.size = size;
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}
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add(hn) {
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if ( this.container.setNeedle(hn).add(this.iroot) === 1 ) {
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this.last = -1;
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this.needle = '';
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@ -556,8 +557,9 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
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return true;
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}
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return false;
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},
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addJS: function(hn) {
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}
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addJS(hn) {
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if ( this.container.setNeedle(hn).addJS(this.iroot) === 1 ) {
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this.last = -1;
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this.needle = '';
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@ -565,8 +567,9 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
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return true;
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}
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return false;
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},
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addWASM: function(hn) {
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}
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addWASM(hn) {
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if ( this.container.setNeedle(hn).addWASM(this.iroot) === 1 ) {
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this.last = -1;
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this.needle = '';
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@ -574,29 +577,33 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
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return true;
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}
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return false;
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},
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matches: function(needle) {
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}
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matches(needle) {
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if ( needle !== this.needle ) {
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this.needle = needle;
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this.last = this.container.setNeedle(needle).matches(this.iroot);
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}
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return this.last;
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},
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matchesJS: function(needle) {
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}
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matchesJS(needle) {
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if ( needle !== this.needle ) {
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this.needle = needle;
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this.last = this.container.setNeedle(needle).matchesJS(this.iroot);
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}
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return this.last;
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},
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matchesWASM: function(needle) {
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}
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matchesWASM(needle) {
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if ( needle !== this.needle ) {
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this.needle = needle;
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this.last = this.container.setNeedle(needle).matchesWASM(this.iroot);
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}
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return this.last;
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},
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[Symbol.iterator]: function() {
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}
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[Symbol.iterator]() {
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return {
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value: undefined,
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done: false,
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@ -646,9 +653,12 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
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forks: [],
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textDecoder: new TextDecoder()
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};
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},
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}
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};
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HNTrieContainer.prototype.HNTrieRef.prototype.last = -1;
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HNTrieContainer.prototype.HNTrieRef.prototype.needle = '';
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/******************************************************************************/
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// Code below is to attempt to load a WASM module which implements:
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@ -662,10 +672,6 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
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(function() {
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HNTrieContainer.wasmModulePromise = null;
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// Default to javascript version.
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HNTrieContainer.prototype.matches = HNTrieContainer.prototype.matchesJS;
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HNTrieContainer.prototype.add = HNTrieContainer.prototype.addJS;
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if (
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typeof WebAssembly !== 'object' ||
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typeof WebAssembly.compileStreaming !== 'function'
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