mirror of
https://github.com/sqlite/sqlite.git
synced 2025-04-28 06:25:11 +03:00
83 lines
3.2 KiB
JavaScript
83 lines
3.2 KiB
JavaScript
/* extern-post-js.js must be appended to the resulting sqlite3.js
|
|
file. It gets its name from being used as the value for
|
|
the --extern-post-js=... Emscripten flag. */
|
|
(function(){
|
|
/**
|
|
In order to hide the sqlite3InitModule()'s resulting Emscripten
|
|
module from downstream clients (and simplify our documentation by
|
|
being able to elide those details), we rewrite
|
|
sqlite3InitModule() to return the sqlite3 object.
|
|
|
|
Unfortunately, we cannot modify the module-loader/exporter-based
|
|
impls which Emscripten installs at some point in the file above
|
|
this.
|
|
*/
|
|
const originalInit = self.sqlite3InitModule;
|
|
if(!originalInit){
|
|
throw new Error("Expecting self.sqlite3InitModule to be defined by the Emscripten build.");
|
|
}
|
|
/**
|
|
We need to add some state which our custom Module.locateFile()
|
|
can see, but an Emscripten limitation currently prevents us from
|
|
attaching it to the sqlite3InitModule function object:
|
|
|
|
https://github.com/emscripten-core/emscripten/issues/18071
|
|
|
|
The only current workaround is to temporarily stash this state
|
|
into the global scope and delete it when sqlite3InitModule()
|
|
is called.
|
|
*/
|
|
const initModuleState = self.sqlite3InitModuleState = Object.assign(Object.create(null),{
|
|
moduleScript: self?.document?.currentScript,
|
|
isWorker: (!self.document && self.window !== self),
|
|
location: self.location,
|
|
urlParams: new URL(self.location.href).searchParams
|
|
});
|
|
if(initModuleState.urlParams.has('sqlite3.dir')){
|
|
initModuleState.sqlite3Dir = initModuleState.urlParams.get('sqlite3.dir') +'/';
|
|
};
|
|
|
|
self.sqlite3InitModule = (...args)=>{
|
|
//console.warn("Using replaced sqlite3InitModule()",self.location);
|
|
return originalInit(...args).then((EmscriptenModule)=>{
|
|
if(self.window!==self &&
|
|
(EmscriptenModule['ENVIRONMENT_IS_PTHREAD']
|
|
|| EmscriptenModule['_pthread_self']
|
|
|| 'function'===typeof threadAlert
|
|
|| self.location.pathname.endsWith('.worker.js')
|
|
)){
|
|
/** Workaround for wasmfs-generated worker, which calls this
|
|
routine from each individual thread and requires that its
|
|
argument be returned. All of the criteria above are fragile,
|
|
based solely on inspection of the offending code, not public
|
|
Emscripten details. */
|
|
return EmscriptenModule;
|
|
}
|
|
EmscriptenModule.sqlite3.scriptInfo = initModuleState;
|
|
//console.warn("sqlite3.scriptInfo =",EmscriptenModule.sqlite3.scriptInfo);
|
|
const f = EmscriptenModule.sqlite3.asyncPostInit;
|
|
delete EmscriptenModule.sqlite3.asyncPostInit;
|
|
return f();
|
|
}).catch((e)=>{
|
|
console.error("Exception loading sqlite3 module:",e);
|
|
throw e;
|
|
});
|
|
};
|
|
self.sqlite3InitModule.ready = originalInit.ready;
|
|
|
|
if(self.sqlite3InitModuleState.moduleScript){
|
|
const sim = self.sqlite3InitModuleState;
|
|
let src = sim.moduleScript.src.split('/');
|
|
src.pop();
|
|
sim.scriptDir = src.join('/') + '/';
|
|
}
|
|
if(0){
|
|
console.warn("Replaced sqlite3InitModule()");
|
|
console.warn("self.location.href =",self.location.href);
|
|
if('undefined' !== typeof document){
|
|
console.warn("document.currentScript.src =",
|
|
document?.currentScript?.src);
|
|
}
|
|
}
|
|
})();
|