making zlib usable in browsers
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El RIDO
parent
20befe4bd6
commit
5b3286df4d
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@ -11,7 +11,7 @@ global.WebCrypto = require('node-webcrypto-ossl');
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// application libraries to test
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global.$ = global.jQuery = require('./jquery-3.3.1');
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global.RawDeflate = require('./rawinflate-0.3').RawDeflate;
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require('./zlib-1.2.11');
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global.zlib = require('./zlib-1.2.11').zlib;
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require('./prettify');
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global.prettyPrint = window.PR.prettyPrint;
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global.prettyPrintOne = window.PR.prettyPrintOne;
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@ -1,144 +1,146 @@
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'use strict';
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let ret;
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(function() {
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let ret;
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async function initialize() {
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if (ret) return ret;
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async function initialize() {
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if (ret) return ret;
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const COMPRESSION_LEVEL = 7;
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const NO_ZLIB_HEADER = -1;
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const CHUNK_SIZE = 32 * 1024;
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const map = {};
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const memory = new WebAssembly.Memory({
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initial: 1,
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maximum: 1024, // 64MB
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});
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const env = {
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memory,
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writeToJs(ptr, size) {
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const o = map[ptr];
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o.onData(new Uint8Array(memory.buffer, dstPtr, size));
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},
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_abort: errno => { console.error(`Error: ${errno}`) },
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_grow: () => { },
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};
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const COMPRESSION_LEVEL = 7;
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const NO_ZLIB_HEADER = -1;
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const CHUNK_SIZE = 32 * 1024;
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const map = {};
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const memory = new WebAssembly.Memory({
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initial: 1,
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maximum: 1024, // 64MB
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});
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const env = {
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memory,
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writeToJs(ptr, size) {
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const o = map[ptr];
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o.onData(new Uint8Array(memory.buffer, dstPtr, size));
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},
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_abort: errno => { console.error(`Error: ${errno}`) },
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_grow: () => { },
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};
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let ins;
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if (typeof fetch === 'undefined') {
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const buff = fs.readFileSync('zlib-1.2.11.wasm');
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const module = await WebAssembly.compile(buff);
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ins = await WebAssembly.instantiate(module, { env });
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} else {
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ins = await WebAssembly.instantiateStreaming(fetch('zlib-1.2.11.wasm'));
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}
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let buff;
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if (typeof fetch === 'undefined') {
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buff = fs.readFileSync('zlib-1.2.11.wasm');
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} else {
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const resp = await fetch('js/zlib-1.2.11.wasm');
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buff = await resp.arrayBuffer();
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}
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const module = await WebAssembly.compile(buff);
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const ins = await WebAssembly.instantiate(module, { env });
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const srcPtr = ins.exports._malloc(CHUNK_SIZE);
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const dstPtr = ins.exports._malloc(CHUNK_SIZE);
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const srcPtr = ins.exports._malloc(CHUNK_SIZE);
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const dstPtr = ins.exports._malloc(CHUNK_SIZE);
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class RawDef {
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constructor() {
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this.zstreamPtr = ins.exports._createDeflateContext(COMPRESSION_LEVEL, NO_ZLIB_HEADER);
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map[this.zstreamPtr] = this;
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this.offset = 0;
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this.buff = new Uint8Array(CHUNK_SIZE);
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class RawDef {
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constructor() {
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this.zstreamPtr = ins.exports._createDeflateContext(COMPRESSION_LEVEL, NO_ZLIB_HEADER);
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map[this.zstreamPtr] = this;
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this.offset = 0;
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this.buff = new Uint8Array(CHUNK_SIZE);
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}
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deflate(chunk, flush) {
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const src = new Uint8Array(memory.buffer, srcPtr, chunk.length);
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src.set(chunk);
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ins.exports._deflate(this.zstreamPtr, srcPtr, dstPtr, chunk.length, CHUNK_SIZE, flush);
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}
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onData(chunk) {
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if (this.buff.length < this.offset + chunk.length) {
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const buff = this.buff;
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this.buff = new Uint8Array(this.buff.length * 2);
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this.buff.set(buff);
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}
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this.buff.set(chunk, this.offset);
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this.offset += chunk.length;
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}
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destroy() {
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ins.exports._freeDeflateContext(this.zstreamPtr);
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delete map[this.zstreamPtr];
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this.buff = null;
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}
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getBuffer() {
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const res = new Uint8Array(this.offset);
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for (let i = 0; i < this.offset; ++i) {
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res[i] = this.buff[i];
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}
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return res;
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}
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}
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class RawInf {
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constructor() {
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this.zstreamPtr = ins.exports._createInflateContext(NO_ZLIB_HEADER);
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map[this.zstreamPtr] = this;
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this.offset = 0;
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this.buff = new Uint8Array(CHUNK_SIZE);
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}
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inflate(chunk) {
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const src = new Uint8Array(memory.buffer, srcPtr, chunk.length);
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src.set(chunk);
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ins.exports._inflate(this.zstreamPtr, srcPtr, dstPtr, chunk.length, CHUNK_SIZE);
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}
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onData(chunk) {
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if (this.buff.length < this.offset + chunk.length) {
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const buff = this.buff;
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this.buff = new Uint8Array(this.buff.length * 2);
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this.buff.set(buff);
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}
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this.buff.set(chunk, this.offset);
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this.offset += chunk.length;
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}
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destroy() {
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ins.exports._freeInflateContext(this.zstreamPtr);
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delete map[this.zstreamPtr];
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this.buff = null;
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}
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getBuffer() {
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const res = new Uint8Array(this.offset);
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for (let i = 0; i < this.offset; ++i) {
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res[i] = this.buff[i];
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}
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return res;
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}
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}
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ret = {
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inflate(rawDeflateBuffer) {
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const rawInf = new RawInf();
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for (let offset = 0; offset < rawDeflateBuffer.length; offset += CHUNK_SIZE) {
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const end = Math.min(offset + CHUNK_SIZE, rawDeflateBuffer.length);
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const chunk = rawDeflateBuffer.subarray(offset, end);
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rawInf.inflate(chunk);
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}
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const ret = rawInf.getBuffer();
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rawInf.destroy();
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return ret;
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},
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deflate(rawInflateBuffer) {
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const rawDef = new RawDef();
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for (let offset = 0; offset < rawInflateBuffer.length; offset += CHUNK_SIZE) {
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const end = Math.min(offset + CHUNK_SIZE, rawInflateBuffer.length);
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const chunk = rawInflateBuffer.subarray(offset, end);
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rawDef.deflate(chunk, rawInflateBuffer.length <= offset + CHUNK_SIZE);
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}
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const ret = rawDef.getBuffer();
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rawDef.destroy();
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return ret;
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},
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}
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return ret;
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}
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deflate(chunk, flush) {
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const src = new Uint8Array(memory.buffer, srcPtr, chunk.length);
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src.set(chunk);
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ins.exports._deflate(this.zstreamPtr, srcPtr, dstPtr, chunk.length, CHUNK_SIZE, flush);
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}
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onData(chunk) {
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if (this.buff.length < this.offset + chunk.length) {
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const buff = this.buff;
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this.buff = new Uint8Array(this.buff.length * 2);
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this.buff.set(buff);
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}
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this.buff.set(chunk, this.offset);
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this.offset += chunk.length;
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}
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destroy() {
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ins.exports._freeDeflateContext(this.zstreamPtr);
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delete map[this.zstreamPtr];
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this.buff = null;
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}
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getBuffer() {
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const res = new Uint8Array(this.offset);
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for (let i = 0; i < this.offset; ++i) {
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res[i] = this.buff[i];
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}
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return res;
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}
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}
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class RawInf {
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constructor() {
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this.zstreamPtr = ins.exports._createInflateContext(NO_ZLIB_HEADER);
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map[this.zstreamPtr] = this;
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this.offset = 0;
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this.buff = new Uint8Array(CHUNK_SIZE);
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}
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inflate(chunk) {
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const src = new Uint8Array(memory.buffer, srcPtr, chunk.length);
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src.set(chunk);
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ins.exports._inflate(this.zstreamPtr, srcPtr, dstPtr, chunk.length, CHUNK_SIZE);
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}
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onData(chunk) {
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if (this.buff.length < this.offset + chunk.length) {
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const buff = this.buff;
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this.buff = new Uint8Array(this.buff.length * 2);
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this.buff.set(buff);
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}
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this.buff.set(chunk, this.offset);
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this.offset += chunk.length;
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}
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destroy() {
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ins.exports._freeInflateContext(this.zstreamPtr);
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delete map[this.zstreamPtr];
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this.buff = null;
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}
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getBuffer() {
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const res = new Uint8Array(this.offset);
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for (let i = 0; i < this.offset; ++i) {
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res[i] = this.buff[i];
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}
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return res;
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}
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}
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ret = {
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inflate(rawDeflateBuffer) {
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const rawInf = new RawInf();
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for (let offset = 0; offset < rawDeflateBuffer.length; offset += CHUNK_SIZE) {
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const end = Math.min(offset + CHUNK_SIZE, rawDeflateBuffer.length);
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const chunk = rawDeflateBuffer.subarray(offset, end);
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rawInf.inflate(chunk);
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}
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const ret = rawInf.getBuffer();
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rawInf.destroy();
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return ret;
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},
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deflate(rawInflateBuffer) {
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const rawDef = new RawDef();
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for (let offset = 0; offset < rawInflateBuffer.length; offset += CHUNK_SIZE) {
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const end = Math.min(offset + CHUNK_SIZE, rawInflateBuffer.length);
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const chunk = rawInflateBuffer.subarray(offset, end);
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rawDef.deflate(chunk, rawInflateBuffer.length <= offset + CHUNK_SIZE);
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}
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const ret = rawDef.getBuffer();
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rawDef.destroy();
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return ret;
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},
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}
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return ret;
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}
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global.zlib = initialize();
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this.zlib = initialize();
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}).call(this);
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