gecko/dom/bluetooth/BluetoothUtils.cpp

62 lines
1.9 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=40: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BluetoothUtils.h"
#include "jsapi.h"
#include "nsTArray.h"
#include "nsString.h"
#include "mozilla/Scoped.h"
nsresult
mozilla::dom::bluetooth::StringArrayToJSArray(JSContext* aCx, JSObject* aGlobal,
const nsTArray<nsString>& aSourceArray,
JSObject** aResultArray)
{
NS_ASSERTION(aCx, "Null context!");
NS_ASSERTION(aGlobal, "Null global!");
JSAutoRequest ar(aCx);
JSAutoEnterCompartment ac;
if (!ac.enter(aCx, aGlobal)) {
NS_WARNING("Failed to enter compartment!");
return NS_ERROR_FAILURE;
}
JSObject* arrayObj;
if (aSourceArray.IsEmpty()) {
arrayObj = JS_NewArrayObject(aCx, 0, nullptr);
} else {
uint32_t valLength = aSourceArray.Length();
mozilla::ScopedDeleteArray<jsval> valArray(new jsval[valLength]);
JS::AutoArrayRooter tvr(aCx, valLength, valArray);
for (PRUint32 index = 0; index < valLength; index++) {
JSString* s = JS_NewUCStringCopyN(aCx, aSourceArray[index].BeginReading(),
aSourceArray[index].Length());
if(!s) {
NS_WARNING("Memory allocation error!");
return NS_ERROR_OUT_OF_MEMORY;
}
valArray[index] = STRING_TO_JSVAL(s);
}
arrayObj = JS_NewArrayObject(aCx, valLength, valArray);
}
if (!arrayObj) {
return NS_ERROR_OUT_OF_MEMORY;
}
// XXX This is not what Jonas wants. He wants it to be live.
// Followup at bug 717414
if (!JS_FreezeObject(aCx, arrayObj)) {
return NS_ERROR_FAILURE;
}
*aResultArray = arrayObj;
return NS_OK;
}