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sqlite/ext/wasm/api/pre-js.js
stephan 956392694a Add a top-level license and build-time version info header to generated sqlite3*.js. Correct a broken link in ext/wasm/index.html.
FossilOrigin-Name: 0f1a06e8e39a1fbc74f1aff9cc59787282dfbf847d6c5c7edb3f7d410db0e4b7
2022-10-16 15:38:03 +00:00

49 lines
1.7 KiB
JavaScript

/**
BEGIN FILE: api/pre-js.js
This file is intended to be prepended to the sqlite3.js build using
Emscripten's --pre-js=THIS_FILE flag (or equivalent).
*/
Module['locateFile'] = function(path, prefix) {
return prefix + path;
};
/**
Bug warning: this xInstantiateWasm bit must remain disabled
until this bug is resolved or wasmfs won't work:
https://github.com/emscripten-core/emscripten/issues/17951
*/
const xInstantiateWasm = 1
? 'emscripten-bug-17951'
: 'instantiateWasm';
Module[xInstantiateWasm] = function callee(imports,onSuccess){
imports.env.foo = function(){};
console.warn("instantiateWasm() uri =",callee.uri, self.location.href);
const wfetch = ()=>fetch(callee.uri, {credentials: 'same-origin'});
const loadWasm = WebAssembly.instantiateStreaming
? async ()=>{
return WebAssembly.instantiateStreaming(wfetch(), imports)
.then((arg)=>onSuccess(arg.instance, arg.module));
}
: async ()=>{ // Safari < v15
return wfetch()
.then(response => response.arrayBuffer())
.then(bytes => WebAssembly.instantiate(bytes, imports))
.then((arg)=>onSuccess(arg.instance, arg.module));
};
loadWasm();
return {};
};
/*
It is literally impossible to reliably get the name of _this_ script
at runtime, so impossible to derive X.wasm from script name
X.js. Thus we need, at build-time, to redefine
Module[xInstantiateWasm].uri by appending it to a build-specific
copy of this file with the name of the wasm file. This is apparently
why Emscripten hard-codes the name of the wasm file into their glue
scripts.
*/
Module[xInstantiateWasm].uri = 'sqlite3.wasm';
/* END FILE: api/pre-js.js */