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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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/. */
/* Queuing strategies. */
#include "builtin/streams/QueueingStrategies.h"
#include "builtin/streams/ClassSpecMacro.h" // JS_STREAMS_CLASS_SPEC
#include "js/CallArgs.h" // JS::CallArgs{,FromVp}
#include "js/Class.h" // JS::ObjectOpResult, JS_NULL_CLASS_OPS
#include "js/PropertySpec.h" // JS{Property,Function}Spec, JS_FN, JS_FS_END, JS_PS_END
#include "js/ProtoKey.h" // JSProto_{ByteLength,Count}QueuingStrategy
#include "js/RootingAPI.h" // JS::{Handle,Rooted}
#include "vm/JSObject.h" // js::GetPrototypeFromBuiltinConstructor
#include "vm/ObjectOperations.h" // js::{Define,Get}Property
#include "vm/Runtime.h" // JSAtomState
#include "vm/StringType.h" // js::NameToId, PropertyName
#include "vm/JSObject-inl.h" // js::NewObjectWithClassProto
#include "vm/NativeObject-inl.h" // js::ThrowIfNotConstructing
using js::ByteLengthQueuingStrategy;
using js::CountQueuingStrategy;
using js::PropertyName;
using JS::CallArgs;
using JS::CallArgsFromVp;
using JS::Handle;
using JS::ObjectOpResult;
using JS::Rooted;
using JS::ToObject;
using JS::Value;
/*** 6.1. Queuing strategies ************************************************/
/**
* ECMA-262 7.3.4 CreateDataProperty(O, P, V)
*/
static MOZ_MUST_USE bool CreateDataProperty(JSContext* cx,
Handle<JSObject*> obj,
Handle<PropertyName*> key,
Handle<Value> value,
ObjectOpResult& result) {
Rooted<jsid> id(cx, js::NameToId(key));
Rooted<JS::PropertyDescriptor> desc(cx);
desc.setDataDescriptor(value, JSPROP_ENUMERATE);
return js::DefineProperty(cx, obj, id, desc, result);
}
// Streams spec, 6.1.2.2. new ByteLengthQueuingStrategy({ highWaterMark })
bool js::ByteLengthQueuingStrategy::constructor(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (!ThrowIfNotConstructing(cx, args, "ByteLengthQueuingStrategy")) {
return false;
}
// Implicit in the spec: Create the new strategy object.
Rooted<JSObject*> proto(cx);
if (!GetPrototypeFromBuiltinConstructor(
cx, args, JSProto_ByteLengthQueuingStrategy, &proto)) {
return false;
}
Rooted<JSObject*> strategy(
cx, NewObjectWithClassProto<ByteLengthQueuingStrategy>(cx, proto));
if (!strategy) {
return false;
}
// Implicit in the spec: Argument destructuring.
Rooted<JSObject*> argObj(cx, ToObject(cx, args.get(0)));
if (!argObj) {
return false;
}
Rooted<Value> highWaterMark(cx);
if (!GetProperty(cx, argObj, argObj, cx->names().highWaterMark,
&highWaterMark)) {
return false;
}
// Step 1: Perform ! CreateDataProperty(this, "highWaterMark",
// highWaterMark).
ObjectOpResult ignored;
if (!CreateDataProperty(cx, strategy, cx->names().highWaterMark,
highWaterMark, ignored)) {
return false;
}
args.rval().setObject(*strategy);
return true;
}
// Streams spec 6.1.2.3.1. size ( chunk )
static bool ByteLengthQueuingStrategy_size(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1: Return ? GetV(chunk, "byteLength").
return GetProperty(cx, args.get(0), cx->names().byteLength, args.rval());
}
static const JSPropertySpec ByteLengthQueuingStrategy_properties[] = {
JS_PS_END};
static const JSFunctionSpec ByteLengthQueuingStrategy_methods[] = {
JS_FN("size", ByteLengthQueuingStrategy_size, 1, 0), JS_FS_END};
JS_STREAMS_CLASS_SPEC(ByteLengthQueuingStrategy, 1, 0, 0, 0, JS_NULL_CLASS_OPS);
// Streams spec, 6.1.3.2. new CountQueuingStrategy({ highWaterMark })
bool js::CountQueuingStrategy::constructor(JSContext* cx, unsigned argc,
Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
if (!ThrowIfNotConstructing(cx, args, "CountQueuingStrategy")) {
return false;
}
// Implicit in the spec: Create the new strategy object.
RootedObject proto(cx);
if (!GetPrototypeFromBuiltinConstructor(
cx, args, JSProto_CountQueuingStrategy, &proto)) {
return false;
}
Rooted<CountQueuingStrategy*> strategy(
cx, NewObjectWithClassProto<CountQueuingStrategy>(cx, proto));
if (!strategy) {
return false;
}
// Implicit in the spec: Argument destructuring.
RootedObject argObj(cx, ToObject(cx, args.get(0)));
if (!argObj) {
return false;
}
RootedValue highWaterMark(cx);
if (!GetProperty(cx, argObj, argObj, cx->names().highWaterMark,
&highWaterMark)) {
return false;
}
// Step 1: Perform ! CreateDataProperty(this, "highWaterMark", highWaterMark).
ObjectOpResult ignored;
if (!CreateDataProperty(cx, strategy, cx->names().highWaterMark,
highWaterMark, ignored)) {
return false;
}
args.rval().setObject(*strategy);
return true;
}
// Streams spec 6.1.3.3.1. size ( chunk )
static bool CountQueuingStrategy_size(JSContext* cx, unsigned argc, Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
// Step 1: Return 1.
args.rval().setInt32(1);
return true;
}
static const JSPropertySpec CountQueuingStrategy_properties[] = {JS_PS_END};
static const JSFunctionSpec CountQueuingStrategy_methods[] = {
JS_FN("size", CountQueuingStrategy_size, 0, 0), JS_FS_END};
JS_STREAMS_CLASS_SPEC(CountQueuingStrategy, 1, 0, 0, 0, JS_NULL_CLASS_OPS);
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