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tree-sitter.js
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// include: shell.js
// The Module object: Our interface to the outside world. We import
// and export values on it. There are various ways Module can be used:
// 1. Not defined. We create it here
// 2. A function parameter, function(moduleArg) => Promise<Module>
// 3. pre-run appended it, var Module = {}; ..generated code..
// 4. External script tag defines var Module.
// We need to check if Module already exists (e.g. case 3 above).
// Substitution will be replaced with actual code on later stage of the build,
// this way Closure Compiler will not mangle it (e.g. case 4. above).
// Note that if you want to run closure, and also to use Module
// after the generated code, you will need to define var Module = {};
// before the code. Then that object will be used in the code, and you
// can continue to use Module afterwards as well.
var Module = typeof Module != "undefined" ? Module : {};
// Determine the runtime environment we are in. You can customize this by
// setting the ENVIRONMENT setting at compile time (see settings.js).
// Attempt to auto-detect the environment
var ENVIRONMENT_IS_WEB = typeof window == "object";
var ENVIRONMENT_IS_WORKER = typeof importScripts == "function";
// N.b. Electron.js environment is simultaneously a NODE-environment, but
// also a web environment.
var ENVIRONMENT_IS_NODE = typeof process == "object" && typeof process.versions == "object" && typeof process.versions.node == "string";
if (ENVIRONMENT_IS_NODE) {}
// --pre-jses are emitted after the Module integration code, so that they can
// refer to Module (if they choose; they can also define Module)
// include: /home/runner/work/tree-sitter/tree-sitter/lib/binding_web/prefix.js
var TreeSitter = function() {
var initPromise;
var document = typeof window == "object" ? {
currentScript: window.document.currentScript
} : null;
class Parser {
constructor() {
this.initialize();
}
initialize() {
throw new Error("cannot construct a Parser before calling `init()`");
}
static init(moduleOptions) {
if (initPromise) return initPromise;
Module = Object.assign({}, Module, moduleOptions);
return initPromise = new Promise(resolveInitPromise => {
// end include: /home/runner/work/tree-sitter/tree-sitter/lib/binding_web/prefix.js
// Sometimes an existing Module object exists with properties
// meant to overwrite the default module functionality. Here
// we collect those properties and reapply _after_ we configure
// the current environment's defaults to avoid having to be so
// defensive during initialization.
var moduleOverrides = Object.assign({}, Module);
var arguments_ = [];
var thisProgram = "./this.program";
var quit_ = (status, toThrow) => {
throw toThrow;
};
// `/` should be present at the end if `scriptDirectory` is not empty
var scriptDirectory = "";
function locateFile(path) {
if (Module["locateFile"]) {
return Module["locateFile"](path, scriptDirectory);
}
return scriptDirectory + path;
}
// Hooks that are implemented differently in different runtime environments.
var readAsync, readBinary;
if (ENVIRONMENT_IS_NODE) {
// These modules will usually be used on Node.js. Load them eagerly to avoid
// the complexity of lazy-loading.
var fs = require("fs");
var nodePath = require("path");
scriptDirectory = __dirname + "/";
// include: node_shell_read.js
readBinary = filename => {
// We need to re-wrap `file://` strings to URLs. Normalizing isn't
// necessary in that case, the path should already be absolute.
filename = isFileURI(filename) ? new URL(filename) : nodePath.normalize(filename);
var ret = fs.readFileSync(filename);
return ret;
};
readAsync = (filename, binary = true) => {
// See the comment in the `readBinary` function.
filename = isFileURI(filename) ? new URL(filename) : nodePath.normalize(filename);
return new Promise((resolve, reject) => {
fs.readFile(filename, binary ? undefined : "utf8", (err, data) => {
if (err) reject(err); else resolve(binary ? data.buffer : data);
});
});
};
// end include: node_shell_read.js
if (!Module["thisProgram"] && process.argv.length > 1) {
thisProgram = process.argv[1].replace(/\\/g, "/");
}
arguments_ = process.argv.slice(2);
if (typeof module != "undefined") {
module["exports"] = Module;
}
quit_ = (status, toThrow) => {
process.exitCode = status;
throw toThrow;
};
} else // Note that this includes Node.js workers when relevant (pthreads is enabled).
// Node.js workers are detected as a combination of ENVIRONMENT_IS_WORKER and
// ENVIRONMENT_IS_NODE.
if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
if (ENVIRONMENT_IS_WORKER) {
// Check worker, not web, since window could be polyfilled
scriptDirectory = self.location.href;
} else if (typeof document != "undefined" && document.currentScript) {
// web
scriptDirectory = document.currentScript.src;
}
// blob urls look like blob:http://site.com/etc/etc and we cannot infer anything from them.
// otherwise, slice off the final part of the url to find the script directory.
// if scriptDirectory does not contain a slash, lastIndexOf will return -1,
// and scriptDirectory will correctly be replaced with an empty string.
// If scriptDirectory contains a query (starting with ?) or a fragment (starting with #),
// they are removed because they could contain a slash.
if (scriptDirectory.startsWith("blob:")) {
scriptDirectory = "";
} else {
scriptDirectory = scriptDirectory.substr(0, scriptDirectory.replace(/[?#].*/, "").lastIndexOf("/") + 1);
}
{
// include: web_or_worker_shell_read.js
if (ENVIRONMENT_IS_WORKER) {
readBinary = url => {
var xhr = new XMLHttpRequest;
xhr.open("GET", url, false);
xhr.responseType = "arraybuffer";
xhr.send(null);
return new Uint8Array(/** @type{!ArrayBuffer} */ (xhr.response));
};
}
readAsync = url => {
// Fetch has some additional restrictions over XHR, like it can't be used on a file:// url.
// See https://github.com/github/fetch/pull/92#issuecomment-140665932
// Cordova or Electron apps are typically loaded from a file:// url.
// So use XHR on webview if URL is a file URL.
if (isFileURI(url)) {
return new Promise((reject, resolve) => {
var xhr = new XMLHttpRequest;
xhr.open("GET", url, true);
xhr.responseType = "arraybuffer";
xhr.onload = () => {
if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) {
// file URLs can return 0
resolve(xhr.response);
}
reject(xhr.status);
};
xhr.onerror = reject;
xhr.send(null);
});
}
return fetch(url, {
credentials: "same-origin"
}).then(response => {
if (response.ok) {
return response.arrayBuffer();
}
return Promise.reject(new Error(response.status + " : " + response.url));
});
};
}
} else // end include: web_or_worker_shell_read.js
{}
var out = Module["print"] || console.log.bind(console);
var err = Module["printErr"] || console.error.bind(console);
// Merge back in the overrides
Object.assign(Module, moduleOverrides);
// Free the object hierarchy contained in the overrides, this lets the GC
// reclaim data used.
moduleOverrides = null;
// Emit code to handle expected values on the Module object. This applies Module.x
// to the proper local x. This has two benefits: first, we only emit it if it is
// expected to arrive, and second, by using a local everywhere else that can be
// minified.
if (Module["arguments"]) arguments_ = Module["arguments"];
if (Module["thisProgram"]) thisProgram = Module["thisProgram"];
if (Module["quit"]) quit_ = Module["quit"];
// perform assertions in shell.js after we set up out() and err(), as otherwise if an assertion fails it cannot print the message
// end include: shell.js
// include: preamble.js
// === Preamble library stuff ===
// Documentation for the public APIs defined in this file must be updated in:
// site/source/docs/api_reference/preamble.js.rst
// A prebuilt local version of the documentation is available at:
// site/build/text/docs/api_reference/preamble.js.txt
// You can also build docs locally as HTML or other formats in site/
// An online HTML version (which may be of a different version of Emscripten)
// is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html
var dynamicLibraries = Module["dynamicLibraries"] || [];
var wasmBinary;
if (Module["wasmBinary"]) wasmBinary = Module["wasmBinary"];
// Wasm globals
var wasmMemory;
//========================================
// Runtime essentials
//========================================
// whether we are quitting the application. no code should run after this.
// set in exit() and abort()
var ABORT = false;
// set by exit() and abort(). Passed to 'onExit' handler.
// NOTE: This is also used as the process return code code in shell environments
// but only when noExitRuntime is false.
var EXITSTATUS;
// Memory management
var /** @type {!Int8Array} */ HEAP8, /** @type {!Uint8Array} */ HEAPU8, /** @type {!Int16Array} */ HEAP16, /** @type {!Uint16Array} */ HEAPU16, /** @type {!Int32Array} */ HEAP32, /** @type {!Uint32Array} */ HEAPU32, /** @type {!Float32Array} */ HEAPF32, /** @type {!Float64Array} */ HEAPF64;
var HEAP_DATA_VIEW;
// include: runtime_shared.js
function updateMemoryViews() {
var b = wasmMemory.buffer;
Module["HEAP_DATA_VIEW"] = HEAP_DATA_VIEW = new DataView(b);
Module["HEAP8"] = HEAP8 = new Int8Array(b);
Module["HEAP16"] = HEAP16 = new Int16Array(b);
Module["HEAPU8"] = HEAPU8 = new Uint8Array(b);
Module["HEAPU16"] = HEAPU16 = new Uint16Array(b);
Module["HEAP32"] = HEAP32 = new Int32Array(b);
Module["HEAPU32"] = HEAPU32 = new Uint32Array(b);
Module["HEAPF32"] = HEAPF32 = new Float32Array(b);
Module["HEAPF64"] = HEAPF64 = new Float64Array(b);
}
// end include: runtime_shared.js
// In non-standalone/normal mode, we create the memory here.
// include: runtime_init_memory.js
// Create the wasm memory. (Note: this only applies if IMPORTED_MEMORY is defined)
// check for full engine support (use string 'subarray' to avoid closure compiler confusion)
if (Module["wasmMemory"]) {
wasmMemory = Module["wasmMemory"];
} else {
var INITIAL_MEMORY = Module["INITIAL_MEMORY"] || 33554432;
wasmMemory = new WebAssembly.Memory({
"initial": INITIAL_MEMORY / 65536,
// In theory we should not need to emit the maximum if we want "unlimited"
// or 4GB of memory, but VMs error on that atm, see
// https://github.com/emscripten-core/emscripten/issues/14130
// And in the pthreads case we definitely need to emit a maximum. So
// always emit one.
"maximum": 2147483648 / 65536
});
}
updateMemoryViews();
// end include: runtime_init_memory.js
// include: runtime_stack_check.js
// end include: runtime_stack_check.js
// include: runtime_assertions.js
// end include: runtime_assertions.js
var __ATPRERUN__ = [];
// functions called before the runtime is initialized
var __ATINIT__ = [];
// functions called during startup
var __ATMAIN__ = [];
// functions called during shutdown
var __ATPOSTRUN__ = [];
// functions called after the main() is called
var __RELOC_FUNCS__ = [];
var runtimeInitialized = false;
function preRun() {
if (Module["preRun"]) {
if (typeof Module["preRun"] == "function") Module["preRun"] = [ Module["preRun"] ];
while (Module["preRun"].length) {
addOnPreRun(Module["preRun"].shift());
}
}
callRuntimeCallbacks(__ATPRERUN__);
}
function initRuntime() {
runtimeInitialized = true;
callRuntimeCallbacks(__RELOC_FUNCS__);
callRuntimeCallbacks(__ATINIT__);
}
function preMain() {
callRuntimeCallbacks(__ATMAIN__);
}
function postRun() {
if (Module["postRun"]) {
if (typeof Module["postRun"] == "function") Module["postRun"] = [ Module["postRun"] ];
while (Module["postRun"].length) {
addOnPostRun(Module["postRun"].shift());
}
}
callRuntimeCallbacks(__ATPOSTRUN__);
}
function addOnPreRun(cb) {
__ATPRERUN__.unshift(cb);
}
function addOnInit(cb) {
__ATINIT__.unshift(cb);
}
function addOnPostRun(cb) {
__ATPOSTRUN__.unshift(cb);
}
// include: runtime_math.js
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/fround
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/clz32
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc
// end include: runtime_math.js
// A counter of dependencies for calling run(). If we need to
// do asynchronous work before running, increment this and
// decrement it. Incrementing must happen in a place like
// Module.preRun (used by emcc to add file preloading).
// Note that you can add dependencies in preRun, even though
// it happens right before run - run will be postponed until
// the dependencies are met.
var runDependencies = 0;
var runDependencyWatcher = null;
var dependenciesFulfilled = null;
// overridden to take different actions when all run dependencies are fulfilled
function getUniqueRunDependency(id) {
return id;
}
function addRunDependency(id) {
runDependencies++;
Module["monitorRunDependencies"]?.(runDependencies);
}
function removeRunDependency(id) {
runDependencies--;
Module["monitorRunDependencies"]?.(runDependencies);
if (runDependencies == 0) {
if (runDependencyWatcher !== null) {
clearInterval(runDependencyWatcher);
runDependencyWatcher = null;
}
if (dependenciesFulfilled) {
var callback = dependenciesFulfilled;
dependenciesFulfilled = null;
callback();
}
}
}
/** @param {string|number=} what */ function abort(what) {
Module["onAbort"]?.(what);
what = "Aborted(" + what + ")";
// TODO(sbc): Should we remove printing and leave it up to whoever
// catches the exception?
err(what);
ABORT = true;
EXITSTATUS = 1;
what += ". Build with -sASSERTIONS for more info.";
// Use a wasm runtime error, because a JS error might be seen as a foreign
// exception, which means we'd run destructors on it. We need the error to
// simply make the program stop.
// FIXME This approach does not work in Wasm EH because it currently does not assume
// all RuntimeErrors are from traps; it decides whether a RuntimeError is from
// a trap or not based on a hidden field within the object. So at the moment
// we don't have a way of throwing a wasm trap from JS. TODO Make a JS API that
// allows this in the wasm spec.
// Suppress closure compiler warning here. Closure compiler's builtin extern
// definition for WebAssembly.RuntimeError claims it takes no arguments even
// though it can.
// TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure gets fixed.
/** @suppress {checkTypes} */ var e = new WebAssembly.RuntimeError(what);
// Throw the error whether or not MODULARIZE is set because abort is used
// in code paths apart from instantiation where an exception is expected
// to be thrown when abort is called.
throw e;
}
// include: memoryprofiler.js
// end include: memoryprofiler.js
// include: URIUtils.js
// Prefix of data URIs emitted by SINGLE_FILE and related options.
var dataURIPrefix = "data:application/octet-stream;base64,";
/**
* Indicates whether filename is a base64 data URI.
* @noinline
*/ var isDataURI = filename => filename.startsWith(dataURIPrefix);
/**
* Indicates whether filename is delivered via file protocol (as opposed to http/https)
* @noinline
*/ var isFileURI = filename => filename.startsWith("file://");
// end include: URIUtils.js
// include: runtime_exceptions.js
// end include: runtime_exceptions.js
function findWasmBinary() {
var f = "tree-sitter.wasm";
if (!isDataURI(f)) {
return locateFile(f);
}
return f;
}
var wasmBinaryFile;
function getBinarySync(file) {
if (file == wasmBinaryFile && wasmBinary) {
return new Uint8Array(wasmBinary);
}
if (readBinary) {
return readBinary(file);
}
throw "both async and sync fetching of the wasm failed";
}
function getBinaryPromise(binaryFile) {
// If we don't have the binary yet, load it asynchronously using readAsync.
if (!wasmBinary) {
// Fetch the binary using readAsync
return readAsync(binaryFile).then(response => new Uint8Array(/** @type{!ArrayBuffer} */ (response)), // Fall back to getBinarySync if readAsync fails
() => getBinarySync(binaryFile));
}
// Otherwise, getBinarySync should be able to get it synchronously
return Promise.resolve().then(() => getBinarySync(binaryFile));
}
function instantiateArrayBuffer(binaryFile, imports, receiver) {
return getBinaryPromise(binaryFile).then(binary => WebAssembly.instantiate(binary, imports)).then(receiver, reason => {
err(`failed to asynchronously prepare wasm: ${reason}`);
abort(reason);
});
}
function instantiateAsync(binary, binaryFile, imports, callback) {
if (!binary && typeof WebAssembly.instantiateStreaming == "function" && !isDataURI(binaryFile) && // Don't use streaming for file:// delivered objects in a webview, fetch them synchronously.
!isFileURI(binaryFile) && // Avoid instantiateStreaming() on Node.js environment for now, as while
// Node.js v18.1.0 implements it, it does not have a full fetch()
// implementation yet.
// Reference:
// https://github.com/emscripten-core/emscripten/pull/16917
!ENVIRONMENT_IS_NODE && typeof fetch == "function") {
return fetch(binaryFile, {
credentials: "same-origin"
}).then(response => {
// Suppress closure warning here since the upstream definition for
// instantiateStreaming only allows Promise<Repsponse> rather than
// an actual Response.
// TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure is fixed.
/** @suppress {checkTypes} */ var result = WebAssembly.instantiateStreaming(response, imports);
return result.then(callback, function(reason) {
// We expect the most common failure cause to be a bad MIME type for the binary,
// in which case falling back to ArrayBuffer instantiation should work.
err(`wasm streaming compile failed: ${reason}`);
err("falling back to ArrayBuffer instantiation");
return instantiateArrayBuffer(binaryFile, imports, callback);
});
});
}
return instantiateArrayBuffer(binaryFile, imports, callback);
}
function getWasmImports() {
// prepare imports
return {
"env": wasmImports,
"wasi_snapshot_preview1": wasmImports,
"GOT.mem": new Proxy(wasmImports, GOTHandler),
"GOT.func": new Proxy(wasmImports, GOTHandler)
};
}
// Create the wasm instance.
// Receives the wasm imports, returns the exports.
function createWasm() {
var info = getWasmImports();
// Load the wasm module and create an instance of using native support in the JS engine.
// handle a generated wasm instance, receiving its exports and
// performing other necessary setup
/** @param {WebAssembly.Module=} module*/ function receiveInstance(instance, module) {
wasmExports = instance.exports;
wasmExports = relocateExports(wasmExports, 1024);
var metadata = getDylinkMetadata(module);
if (metadata.neededDynlibs) {
dynamicLibraries = metadata.neededDynlibs.concat(dynamicLibraries);
}
mergeLibSymbols(wasmExports, "main");
LDSO.init();
loadDylibs();
addOnInit(wasmExports["__wasm_call_ctors"]);
__RELOC_FUNCS__.push(wasmExports["__wasm_apply_data_relocs"]);
removeRunDependency("wasm-instantiate");
return wasmExports;
}
// wait for the pthread pool (if any)
addRunDependency("wasm-instantiate");
// Prefer streaming instantiation if available.
function receiveInstantiationResult(result) {
// 'result' is a ResultObject object which has both the module and instance.
// receiveInstance() will swap in the exports (to Module.asm) so they can be called
receiveInstance(result["instance"], result["module"]);
}
// User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
// to manually instantiate the Wasm module themselves. This allows pages to
// run the instantiation parallel to any other async startup actions they are
// performing.
// Also pthreads and wasm workers initialize the wasm instance through this
// path.
if (Module["instantiateWasm"]) {
try {
return Module["instantiateWasm"](info, receiveInstance);
} catch (e) {
err(`Module.instantiateWasm callback failed with error: ${e}`);
return false;
}
}
if (!wasmBinaryFile) wasmBinaryFile = findWasmBinary();
instantiateAsync(wasmBinary, wasmBinaryFile, info, receiveInstantiationResult);
return {};
}
// include: runtime_debug.js
// end include: runtime_debug.js
// === Body ===
var ASM_CONSTS = {};
// end include: preamble.js
/** @constructor */ function ExitStatus(status) {
this.name = "ExitStatus";
this.message = `Program terminated with exit(${status})`;
this.status = status;
}
var GOT = {};
var currentModuleWeakSymbols = new Set([]);
var GOTHandler = {
get(obj, symName) {
var rtn = GOT[symName];
if (!rtn) {
rtn = GOT[symName] = new WebAssembly.Global({
"value": "i32",
"mutable": true
});
}
if (!currentModuleWeakSymbols.has(symName)) {
// Any non-weak reference to a symbol marks it as `required`, which
// enabled `reportUndefinedSymbols` to report undefeind symbol errors
// correctly.
rtn.required = true;
}
return rtn;
}
};
var LE_HEAP_LOAD_F32 = byteOffset => HEAP_DATA_VIEW.getFloat32(byteOffset, true);
var LE_HEAP_LOAD_F64 = byteOffset => HEAP_DATA_VIEW.getFloat64(byteOffset, true);
var LE_HEAP_LOAD_I16 = byteOffset => HEAP_DATA_VIEW.getInt16(byteOffset, true);
var LE_HEAP_LOAD_I32 = byteOffset => HEAP_DATA_VIEW.getInt32(byteOffset, true);
var LE_HEAP_LOAD_U32 = byteOffset => HEAP_DATA_VIEW.getUint32(byteOffset, true);
var LE_HEAP_STORE_F32 = (byteOffset, value) => HEAP_DATA_VIEW.setFloat32(byteOffset, value, true);
var LE_HEAP_STORE_F64 = (byteOffset, value) => HEAP_DATA_VIEW.setFloat64(byteOffset, value, true);
var LE_HEAP_STORE_I16 = (byteOffset, value) => HEAP_DATA_VIEW.setInt16(byteOffset, value, true);
var LE_HEAP_STORE_I32 = (byteOffset, value) => HEAP_DATA_VIEW.setInt32(byteOffset, value, true);
var LE_HEAP_STORE_U32 = (byteOffset, value) => HEAP_DATA_VIEW.setUint32(byteOffset, value, true);
var callRuntimeCallbacks = callbacks => {
while (callbacks.length > 0) {
// Pass the module as the first argument.
callbacks.shift()(Module);
}
};
var UTF8Decoder = typeof TextDecoder != "undefined" ? new TextDecoder : undefined;
/**
* Given a pointer 'idx' to a null-terminated UTF8-encoded string in the given
* array that contains uint8 values, returns a copy of that string as a
* Javascript String object.
* heapOrArray is either a regular array, or a JavaScript typed array view.
* @param {number} idx
* @param {number=} maxBytesToRead
* @return {string}
*/ var UTF8ArrayToString = (heapOrArray, idx, maxBytesToRead) => {
var endIdx = idx + maxBytesToRead;
var endPtr = idx;
// TextDecoder needs to know the byte length in advance, it doesn't stop on
// null terminator by itself. Also, use the length info to avoid running tiny
// strings through TextDecoder, since .subarray() allocates garbage.
// (As a tiny code save trick, compare endPtr against endIdx using a negation,
// so that undefined means Infinity)
while (heapOrArray[endPtr] && !(endPtr >= endIdx)) ++endPtr;
if (endPtr - idx > 16 && heapOrArray.buffer && UTF8Decoder) {
return UTF8Decoder.decode(heapOrArray.subarray(idx, endPtr));
}
var str = "";
// If building with TextDecoder, we have already computed the string length
// above, so test loop end condition against that
while (idx < endPtr) {
// For UTF8 byte structure, see:
// http://en.wikipedia.org/wiki/UTF-8#Description
// https://www.ietf.org/rfc/rfc2279.txt
// https://tools.ietf.org/html/rfc3629
var u0 = heapOrArray[idx++];
if (!(u0 & 128)) {
str += String.fromCharCode(u0);
continue;
}
var u1 = heapOrArray[idx++] & 63;
if ((u0 & 224) == 192) {
str += String.fromCharCode(((u0 & 31) << 6) | u1);
continue;
}
var u2 = heapOrArray[idx++] & 63;
if ((u0 & 240) == 224) {
u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
} else {
u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heapOrArray[idx++] & 63);
}
if (u0 < 65536) {
str += String.fromCharCode(u0);
} else {
var ch = u0 - 65536;
str += String.fromCharCode(55296 | (ch >> 10), 56320 | (ch & 1023));
}
}
return str;
};
var getDylinkMetadata = binary => {
var offset = 0;
var end = 0;
function getU8() {
return binary[offset++];
}
function getLEB() {
var ret = 0;
var mul = 1;
while (1) {
var byte = binary[offset++];
ret += ((byte & 127) * mul);
mul *= 128;
if (!(byte & 128)) break;
}
return ret;
}
function getString() {
var len = getLEB();
offset += len;
return UTF8ArrayToString(binary, offset - len, len);
}
/** @param {string=} message */ function failIf(condition, message) {
if (condition) throw new Error(message);
}
var name = "dylink.0";
if (binary instanceof WebAssembly.Module) {
var dylinkSection = WebAssembly.Module.customSections(binary, name);
if (dylinkSection.length === 0) {
name = "dylink";
dylinkSection = WebAssembly.Module.customSections(binary, name);
}
failIf(dylinkSection.length === 0, "need dylink section");
binary = new Uint8Array(dylinkSection[0]);
end = binary.length;
} else {
var int32View = new Uint32Array(new Uint8Array(binary.subarray(0, 24)).buffer);
var magicNumberFound = int32View[0] == 1836278016 || int32View[0] == 6386541;
failIf(!magicNumberFound, "need to see wasm magic number");
// \0asm
// we should see the dylink custom section right after the magic number and wasm version
failIf(binary[8] !== 0, "need the dylink section to be first");
offset = 9;
var section_size = getLEB();
//section size
end = offset + section_size;
name = getString();
}
var customSection = {
neededDynlibs: [],
tlsExports: new Set,
weakImports: new Set
};
if (name == "dylink") {
customSection.memorySize = getLEB();
customSection.memoryAlign = getLEB();
customSection.tableSize = getLEB();
customSection.tableAlign = getLEB();
// shared libraries this module needs. We need to load them first, so that
// current module could resolve its imports. (see tools/shared.py
// WebAssembly.make_shared_library() for "dylink" section extension format)
var neededDynlibsCount = getLEB();
for (var i = 0; i < neededDynlibsCount; ++i) {
var libname = getString();
customSection.neededDynlibs.push(libname);
}
} else {
failIf(name !== "dylink.0");
var WASM_DYLINK_MEM_INFO = 1;
var WASM_DYLINK_NEEDED = 2;
var WASM_DYLINK_EXPORT_INFO = 3;
var WASM_DYLINK_IMPORT_INFO = 4;
var WASM_SYMBOL_TLS = 256;
var WASM_SYMBOL_BINDING_MASK = 3;
var WASM_SYMBOL_BINDING_WEAK = 1;
while (offset < end) {
var subsectionType = getU8();
var subsectionSize = getLEB();
if (subsectionType === WASM_DYLINK_MEM_INFO) {
customSection.memorySize = getLEB();
customSection.memoryAlign = getLEB();
customSection.tableSize = getLEB();
customSection.tableAlign = getLEB();
} else if (subsectionType === WASM_DYLINK_NEEDED) {
var neededDynlibsCount = getLEB();
for (var i = 0; i < neededDynlibsCount; ++i) {
libname = getString();
customSection.neededDynlibs.push(libname);
}
} else if (subsectionType === WASM_DYLINK_EXPORT_INFO) {
var count = getLEB();
while (count--) {
var symname = getString();
var flags = getLEB();
if (flags & WASM_SYMBOL_TLS) {
customSection.tlsExports.add(symname);
}
}
} else if (subsectionType === WASM_DYLINK_IMPORT_INFO) {
var count = getLEB();
while (count--) {
var modname = getString();
var symname = getString();
var flags = getLEB();
if ((flags & WASM_SYMBOL_BINDING_MASK) == WASM_SYMBOL_BINDING_WEAK) {
customSection.weakImports.add(symname);
}
}
} else {
// unknown subsection
offset += subsectionSize;
}
}
}
return customSection;
};
/**
* @param {number} ptr
* @param {string} type
*/ function getValue(ptr, type = "i8") {
if (type.endsWith("*")) type = "*";
switch (type) {
case "i1":
return HEAP8[ptr];
case "i8":
return HEAP8[ptr];
case "i16":
return LE_HEAP_LOAD_I16(((ptr) >> 1) * 2);
case "i32":
return LE_HEAP_LOAD_I32(((ptr) >> 2) * 4);
case "i64":
abort("to do getValue(i64) use WASM_BIGINT");
case "float":
return LE_HEAP_LOAD_F32(((ptr) >> 2) * 4);
case "double":
return LE_HEAP_LOAD_F64(((ptr) >> 3) * 8);
case "*":
return LE_HEAP_LOAD_U32(((ptr) >> 2) * 4);
default:
abort(`invalid type for getValue: ${type}`);
}
}
var newDSO = (name, handle, syms) => {
var dso = {
refcount: Infinity,
name: name,
exports: syms,
global: true
};
LDSO.loadedLibsByName[name] = dso;
if (handle != undefined) {
LDSO.loadedLibsByHandle[handle] = dso;
}
return dso;
};
var LDSO = {
loadedLibsByName: {},
loadedLibsByHandle: {},
init() {
newDSO("__main__", 0, wasmImports);
}
};
var ___heap_base = 78112;
var zeroMemory = (address, size) => {
HEAPU8.fill(0, address, address + size);
return address;
};
var alignMemory = (size, alignment) => Math.ceil(size / alignment) * alignment;
var getMemory = size => {
// After the runtime is initialized, we must only use sbrk() normally.
if (runtimeInitialized) {
// Currently we don't support freeing of static data when modules are
// unloaded via dlclose. This function is tagged as `noleakcheck` to
// avoid having this reported as leak.
return zeroMemory(_malloc(size), size);
}
var ret = ___heap_base;
// Keep __heap_base stack aligned.
var end = ret + alignMemory(size, 16);
___heap_base = end;
GOT["__heap_base"].value = end;
return ret;
};
var isInternalSym = symName => [ "__cpp_exception", "__c_longjmp", "__wasm_apply_data_relocs", "__dso_handle", "__tls_size", "__tls_align", "__set_stack_limits", "_emscripten_tls_init", "__wasm_init_tls", "__wasm_call_ctors", "__start_em_asm", "__stop_em_asm", "__start_em_js", "__stop_em_js" ].includes(symName) || symName.startsWith("__em_js__");
var uleb128Encode = (n, target) => {
if (n < 128) {
target.push(n);
} else {
target.push((n % 128) | 128, n >> 7);
}
};
var sigToWasmTypes = sig => {
var typeNames = {
"i": "i32",
"j": "i64",
"f": "f32",
"d": "f64",
"e": "externref",
"p": "i32"
};
var type = {
parameters: [],
results: sig[0] == "v" ? [] : [ typeNames[sig[0]] ]
};
for (var i = 1; i < sig.length; ++i) {
type.parameters.push(typeNames[sig[i]]);
}
return type;
};
var generateFuncType = (sig, target) => {
var sigRet = sig.slice(0, 1);
var sigParam = sig.slice(1);
var typeCodes = {
"i": 127,
// i32
"p": 127,
// i32
"j": 126,
// i64
"f": 125,
// f32
"d": 124,
// f64
"e": 111
};
// Parameters, length + signatures
target.push(96);
/* form: func */ uleb128Encode(sigParam.length, target);
for (var i = 0; i < sigParam.length; ++i) {
target.push(typeCodes[sigParam[i]]);
}
// Return values, length + signatures
// With no multi-return in MVP, either 0 (void) or 1 (anything else)
if (sigRet == "v") {
target.push(0);
} else {
target.push(1, typeCodes[sigRet]);
}
};
var convertJsFunctionToWasm = (func, sig) => {
// If the type reflection proposal is available, use the new
// "WebAssembly.Function" constructor.
// Otherwise, construct a minimal wasm module importing the JS function and
// re-exporting it.
if (typeof WebAssembly.Function == "function") {
return new WebAssembly.Function(sigToWasmTypes(sig), func);
}
// The module is static, with the exception of the type section, which is
// generated based on the signature passed in.
var typeSectionBody = [ 1 ];
// count: 1
generateFuncType(sig, typeSectionBody);
// Rest of the module is static
var bytes = [ 0, 97, 115, 109, // magic ("\0asm")
1, 0, 0, 0, // version: 1
1 ];
// Write the overall length of the type section followed by the body
uleb128Encode(typeSectionBody.length, bytes);
bytes.push(...typeSectionBody);
// The rest of the module is static
bytes.push(2, 7, // import section
// (import "e" "f" (func 0 (type 0)))
1, 1, 101, 1, 102, 0, 0, 7, 5, // export section
// (export "f" (func 0 (type 0)))
1, 1, 102, 0, 0);
// We can compile this wasm module synchronously because it is very small.
// This accepts an import (at "e.f"), that it reroutes to an export (at "f")
var module = new WebAssembly.Module(new Uint8Array(bytes));
var instance = new WebAssembly.Instance(module, {
"e": {
"f": func
}
});
var wrappedFunc = instance.exports["f"];
return wrappedFunc;
};
var wasmTableMirror = [];
/** @type {WebAssembly.Table} */ var wasmTable = new WebAssembly.Table({
"initial": 28,
"element": "anyfunc"
});
var getWasmTableEntry = funcPtr => {
var func = wasmTableMirror[funcPtr];
if (!func) {
if (funcPtr >= wasmTableMirror.length) wasmTableMirror.length = funcPtr + 1;
wasmTableMirror[funcPtr] = func = wasmTable.get(funcPtr);
}
return func;
};
var updateTableMap = (offset, count) => {
if (functionsInTableMap) {
for (var i = offset; i < offset + count; i++) {
var item = getWasmTableEntry(i);
// Ignore null values.
if (item) {
functionsInTableMap.set(item, i);
}
}
}
};
var functionsInTableMap;
var getFunctionAddress = func => {
// First, create the map if this is the first use.
if (!functionsInTableMap) {
functionsInTableMap = new WeakMap;
updateTableMap(0, wasmTable.length);
}
return functionsInTableMap.get(func) || 0;
};
var freeTableIndexes = [];
var getEmptyTableSlot = () => {
// Reuse a free index if there is one, otherwise grow.
if (freeTableIndexes.length) {
return freeTableIndexes.pop();
}
// Grow the table
try {
wasmTable.grow(1);
} catch (err) {
if (!(err instanceof RangeError)) {
throw err;
}
throw "Unable to grow wasm table. Set ALLOW_TABLE_GROWTH.";
}
return wasmTable.length - 1;
};
var setWasmTableEntry = (idx, func) => {
wasmTable.set(idx, func);
// With ABORT_ON_WASM_EXCEPTIONS wasmTable.get is overridden to return wrapped
// functions so we need to call it here to retrieve the potential wrapper correctly
// instead of just storing 'func' directly into wasmTableMirror
wasmTableMirror[idx] = wasmTable.get(idx);
};
/** @param {string=} sig */ var addFunction = (func, sig) => {
// Check if the function is already in the table, to ensure each function
// gets a unique index.
var rtn = getFunctionAddress(func);
if (rtn) {
return rtn;
}
// It's not in the table, add it now.
var ret = getEmptyTableSlot();
// Set the new value.
try {
// Attempting to call this with JS function will cause of table.set() to fail
setWasmTableEntry(ret, func);
} catch (err) {
if (!(err instanceof TypeError)) {
throw err;
}
var wrapped = convertJsFunctionToWasm(func, sig);
setWasmTableEntry(ret, wrapped);
}
functionsInTableMap.set(func, ret);
return ret;
};
var updateGOT = (exports, replace) => {
for (var symName in exports) {
if (isInternalSym(symName)) {
continue;
}
var value = exports[symName];
if (symName.startsWith("orig$")) {
symName = symName.split("$")[1];
replace = true;
}
GOT[symName] ||= new WebAssembly.Global({
"value": "i32",
"mutable": true
});
if (replace || GOT[symName].value == 0) {
if (typeof value == "function") {
GOT[symName].value = addFunction(value);
} else if (typeof value == "number") {
GOT[symName].value = value;
} else {
err(`unhandled export type for '${symName}': ${typeof value}`);
}
}
}
};
/** @param {boolean=} replace */ var relocateExports = (exports, memoryBase, replace) => {
var relocated = {};
for (var e in exports) {
var value = exports[e];
if (typeof value == "object") {
// a breaking change in the wasm spec, globals are now objects
// https://github.com/WebAssembly/mutable-global/issues/1
value = value.value;
}
if (typeof value == "number") {
value += memoryBase;
}
relocated[e] = value;
}
updateGOT(relocated, replace);