1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/vm/TypedArrayObject.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,2761 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "vm/TypedArrayObject.h"
1.11 +
1.12 +#include "mozilla/Alignment.h"
1.13 +#include "mozilla/FloatingPoint.h"
1.14 +#include "mozilla/PodOperations.h"
1.15 +
1.16 +#include <string.h>
1.17 +#ifndef XP_WIN
1.18 +# include <sys/mman.h>
1.19 +#endif
1.20 +
1.21 +#include "jsapi.h"
1.22 +#include "jsarray.h"
1.23 +#include "jscntxt.h"
1.24 +#include "jscpucfg.h"
1.25 +#include "jsnum.h"
1.26 +#include "jsobj.h"
1.27 +#include "jstypes.h"
1.28 +#include "jsutil.h"
1.29 +#ifdef XP_WIN
1.30 +# include "jswin.h"
1.31 +#endif
1.32 +#include "jswrapper.h"
1.33 +
1.34 +#include "gc/Barrier.h"
1.35 +#include "gc/Marking.h"
1.36 +#include "jit/AsmJS.h"
1.37 +#include "jit/AsmJSModule.h"
1.38 +#include "vm/ArrayBufferObject.h"
1.39 +#include "vm/GlobalObject.h"
1.40 +#include "vm/Interpreter.h"
1.41 +#include "vm/NumericConversions.h"
1.42 +#include "vm/SharedArrayObject.h"
1.43 +#include "vm/WrapperObject.h"
1.44 +
1.45 +#include "jsatominlines.h"
1.46 +#include "jsinferinlines.h"
1.47 +#include "jsobjinlines.h"
1.48 +
1.49 +#include "vm/Shape-inl.h"
1.50 +
1.51 +using namespace js;
1.52 +using namespace js::gc;
1.53 +using namespace js::types;
1.54 +
1.55 +using mozilla::IsNaN;
1.56 +using mozilla::NegativeInfinity;
1.57 +using mozilla::PodCopy;
1.58 +using mozilla::PositiveInfinity;
1.59 +using JS::CanonicalizeNaN;
1.60 +using JS::GenericNaN;
1.61 +
1.62 +static bool
1.63 +ValueIsLength(const Value &v, uint32_t *len)
1.64 +{
1.65 + if (v.isInt32()) {
1.66 + int32_t i = v.toInt32();
1.67 + if (i < 0)
1.68 + return false;
1.69 + *len = i;
1.70 + return true;
1.71 + }
1.72 +
1.73 + if (v.isDouble()) {
1.74 + double d = v.toDouble();
1.75 + if (IsNaN(d))
1.76 + return false;
1.77 +
1.78 + uint32_t length = uint32_t(d);
1.79 + if (d != double(length))
1.80 + return false;
1.81 +
1.82 + *len = length;
1.83 + return true;
1.84 + }
1.85 +
1.86 + return false;
1.87 +}
1.88 +
1.89 +/*
1.90 + * TypedArrayObject
1.91 + *
1.92 + * The non-templated base class for the specific typed implementations.
1.93 + * This class holds all the member variables that are used by
1.94 + * the subclasses.
1.95 + */
1.96 +
1.97 +void
1.98 +TypedArrayObject::neuter(void *newData)
1.99 +{
1.100 + setSlot(LENGTH_SLOT, Int32Value(0));
1.101 + setSlot(BYTELENGTH_SLOT, Int32Value(0));
1.102 + setSlot(BYTEOFFSET_SLOT, Int32Value(0));
1.103 + setPrivate(newData);
1.104 +}
1.105 +
1.106 +ArrayBufferObject *
1.107 +TypedArrayObject::sharedBuffer() const
1.108 +{
1.109 + return &bufferValue(const_cast<TypedArrayObject*>(this)).toObject().as<SharedArrayBufferObject>();
1.110 +}
1.111 +
1.112 +/* static */ bool
1.113 +TypedArrayObject::ensureHasBuffer(JSContext *cx, Handle<TypedArrayObject *> tarray)
1.114 +{
1.115 + if (tarray->buffer())
1.116 + return true;
1.117 +
1.118 + Rooted<ArrayBufferObject *> buffer(cx, ArrayBufferObject::create(cx, tarray->byteLength()));
1.119 + if (!buffer)
1.120 + return false;
1.121 +
1.122 + buffer->addView(tarray);
1.123 +
1.124 + memcpy(buffer->dataPointer(), tarray->viewData(), tarray->byteLength());
1.125 + InitArrayBufferViewDataPointer(tarray, buffer, 0);
1.126 +
1.127 + tarray->setSlot(BUFFER_SLOT, ObjectValue(*buffer));
1.128 + return true;
1.129 +}
1.130 +
1.131 +/* static */ int
1.132 +TypedArrayObject::lengthOffset()
1.133 +{
1.134 + return JSObject::getFixedSlotOffset(LENGTH_SLOT);
1.135 +}
1.136 +
1.137 +/* static */ int
1.138 +TypedArrayObject::dataOffset()
1.139 +{
1.140 + return JSObject::getPrivateDataOffset(DATA_SLOT);
1.141 +}
1.142 +
1.143 +/* Helper clamped uint8_t type */
1.144 +
1.145 +uint32_t JS_FASTCALL
1.146 +js::ClampDoubleToUint8(const double x)
1.147 +{
1.148 + // Not < so that NaN coerces to 0
1.149 + if (!(x >= 0))
1.150 + return 0;
1.151 +
1.152 + if (x > 255)
1.153 + return 255;
1.154 +
1.155 + double toTruncate = x + 0.5;
1.156 + uint8_t y = uint8_t(toTruncate);
1.157 +
1.158 + /*
1.159 + * now val is rounded to nearest, ties rounded up. We want
1.160 + * rounded to nearest ties to even, so check whether we had a
1.161 + * tie.
1.162 + */
1.163 + if (y == toTruncate) {
1.164 + /*
1.165 + * It was a tie (since adding 0.5 gave us the exact integer
1.166 + * we want). Since we rounded up, we either already have an
1.167 + * even number or we have an odd number but the number we
1.168 + * want is one less. So just unconditionally masking out the
1.169 + * ones bit should do the trick to get us the value we
1.170 + * want.
1.171 + */
1.172 + return y & ~1;
1.173 + }
1.174 +
1.175 + return y;
1.176 +}
1.177 +
1.178 +template<typename NativeType> static inline const int TypeIDOfType();
1.179 +template<> inline const int TypeIDOfType<int8_t>() { return ScalarTypeDescr::TYPE_INT8; }
1.180 +template<> inline const int TypeIDOfType<uint8_t>() { return ScalarTypeDescr::TYPE_UINT8; }
1.181 +template<> inline const int TypeIDOfType<int16_t>() { return ScalarTypeDescr::TYPE_INT16; }
1.182 +template<> inline const int TypeIDOfType<uint16_t>() { return ScalarTypeDescr::TYPE_UINT16; }
1.183 +template<> inline const int TypeIDOfType<int32_t>() { return ScalarTypeDescr::TYPE_INT32; }
1.184 +template<> inline const int TypeIDOfType<uint32_t>() { return ScalarTypeDescr::TYPE_UINT32; }
1.185 +template<> inline const int TypeIDOfType<float>() { return ScalarTypeDescr::TYPE_FLOAT32; }
1.186 +template<> inline const int TypeIDOfType<double>() { return ScalarTypeDescr::TYPE_FLOAT64; }
1.187 +template<> inline const int TypeIDOfType<uint8_clamped>() { return ScalarTypeDescr::TYPE_UINT8_CLAMPED; }
1.188 +
1.189 +template<typename ElementType>
1.190 +static inline JSObject *
1.191 +NewArray(JSContext *cx, uint32_t nelements);
1.192 +
1.193 +namespace {
1.194 +
1.195 +template<typename NativeType>
1.196 +class TypedArrayObjectTemplate : public TypedArrayObject
1.197 +{
1.198 + public:
1.199 + typedef NativeType ThisType;
1.200 + typedef TypedArrayObjectTemplate<NativeType> ThisTypedArrayObject;
1.201 + static const int ArrayTypeID() { return TypeIDOfType<NativeType>(); }
1.202 + static const bool ArrayTypeIsUnsigned() { return TypeIsUnsigned<NativeType>(); }
1.203 + static const bool ArrayTypeIsFloatingPoint() { return TypeIsFloatingPoint<NativeType>(); }
1.204 +
1.205 + static const size_t BYTES_PER_ELEMENT = sizeof(ThisType);
1.206 +
1.207 + static inline const Class *protoClass()
1.208 + {
1.209 + return &TypedArrayObject::protoClasses[ArrayTypeID()];
1.210 + }
1.211 +
1.212 + static inline const Class *instanceClass()
1.213 + {
1.214 + return &TypedArrayObject::classes[ArrayTypeID()];
1.215 + }
1.216 +
1.217 + static bool is(HandleValue v) {
1.218 + return v.isObject() && v.toObject().hasClass(instanceClass());
1.219 + }
1.220 +
1.221 + static void
1.222 + setIndexValue(TypedArrayObject &tarray, uint32_t index, double d)
1.223 + {
1.224 + // If the array is an integer array, we only handle up to
1.225 + // 32-bit ints from this point on. if we want to handle
1.226 + // 64-bit ints, we'll need some changes.
1.227 +
1.228 + // Assign based on characteristics of the destination type
1.229 + if (ArrayTypeIsFloatingPoint()) {
1.230 + setIndex(tarray, index, NativeType(d));
1.231 + } else if (ArrayTypeIsUnsigned()) {
1.232 + JS_ASSERT(sizeof(NativeType) <= 4);
1.233 + uint32_t n = ToUint32(d);
1.234 + setIndex(tarray, index, NativeType(n));
1.235 + } else if (ArrayTypeID() == ScalarTypeDescr::TYPE_UINT8_CLAMPED) {
1.236 + // The uint8_clamped type has a special rounding converter
1.237 + // for doubles.
1.238 + setIndex(tarray, index, NativeType(d));
1.239 + } else {
1.240 + JS_ASSERT(sizeof(NativeType) <= 4);
1.241 + int32_t n = ToInt32(d);
1.242 + setIndex(tarray, index, NativeType(n));
1.243 + }
1.244 + }
1.245 +
1.246 + static TypedArrayObject *
1.247 + makeProtoInstance(JSContext *cx, HandleObject proto, AllocKind allocKind)
1.248 + {
1.249 + JS_ASSERT(proto);
1.250 +
1.251 + RootedObject obj(cx, NewBuiltinClassInstance(cx, instanceClass(), allocKind));
1.252 + if (!obj)
1.253 + return nullptr;
1.254 +
1.255 + types::TypeObject *type = cx->getNewType(obj->getClass(), proto.get());
1.256 + if (!type)
1.257 + return nullptr;
1.258 + obj->setType(type);
1.259 +
1.260 + return &obj->as<TypedArrayObject>();
1.261 + }
1.262 +
1.263 + static TypedArrayObject *
1.264 + makeTypedInstance(JSContext *cx, uint32_t len, AllocKind allocKind)
1.265 + {
1.266 + if (len * sizeof(NativeType) >= TypedArrayObject::SINGLETON_TYPE_BYTE_LENGTH) {
1.267 + return &NewBuiltinClassInstance(cx, instanceClass(), allocKind,
1.268 + SingletonObject)->as<TypedArrayObject>();
1.269 + }
1.270 +
1.271 + jsbytecode *pc;
1.272 + RootedScript script(cx, cx->currentScript(&pc));
1.273 + NewObjectKind newKind = script
1.274 + ? UseNewTypeForInitializer(script, pc, instanceClass())
1.275 + : GenericObject;
1.276 + RootedObject obj(cx, NewBuiltinClassInstance(cx, instanceClass(), allocKind, newKind));
1.277 + if (!obj)
1.278 + return nullptr;
1.279 +
1.280 + if (script) {
1.281 + if (!types::SetInitializerObjectType(cx, script, pc, obj, newKind))
1.282 + return nullptr;
1.283 + }
1.284 +
1.285 + return &obj->as<TypedArrayObject>();
1.286 + }
1.287 +
1.288 + static JSObject *
1.289 + makeInstance(JSContext *cx, Handle<ArrayBufferObject *> buffer, uint32_t byteOffset, uint32_t len,
1.290 + HandleObject proto)
1.291 + {
1.292 + JS_ASSERT_IF(!buffer, byteOffset == 0);
1.293 +
1.294 + gc::AllocKind allocKind = buffer
1.295 + ? GetGCObjectKind(instanceClass())
1.296 + : AllocKindForLazyBuffer(len * sizeof(NativeType));
1.297 +
1.298 + Rooted<TypedArrayObject*> obj(cx);
1.299 + if (proto)
1.300 + obj = makeProtoInstance(cx, proto, allocKind);
1.301 + else
1.302 + obj = makeTypedInstance(cx, len, allocKind);
1.303 + if (!obj)
1.304 + return nullptr;
1.305 +
1.306 + obj->setSlot(TYPE_SLOT, Int32Value(ArrayTypeID()));
1.307 + obj->setSlot(BUFFER_SLOT, ObjectOrNullValue(buffer));
1.308 +
1.309 + if (buffer) {
1.310 + InitArrayBufferViewDataPointer(obj, buffer, byteOffset);
1.311 + } else {
1.312 + void *data = obj->fixedData(FIXED_DATA_START);
1.313 + obj->initPrivate(data);
1.314 + memset(data, 0, len * sizeof(NativeType));
1.315 + }
1.316 +
1.317 + obj->setSlot(LENGTH_SLOT, Int32Value(len));
1.318 + obj->setSlot(BYTEOFFSET_SLOT, Int32Value(byteOffset));
1.319 + obj->setSlot(BYTELENGTH_SLOT, Int32Value(len * sizeof(NativeType)));
1.320 + obj->setSlot(NEXT_VIEW_SLOT, PrivateValue(nullptr));
1.321 +
1.322 +#ifdef DEBUG
1.323 + if (buffer) {
1.324 + uint32_t arrayByteLength = obj->byteLength();
1.325 + uint32_t arrayByteOffset = obj->byteOffset();
1.326 + uint32_t bufferByteLength = buffer->byteLength();
1.327 + JS_ASSERT_IF(!buffer->isNeutered(), buffer->dataPointer() <= obj->viewData());
1.328 + JS_ASSERT(bufferByteLength - arrayByteOffset >= arrayByteLength);
1.329 + JS_ASSERT(arrayByteOffset <= bufferByteLength);
1.330 + }
1.331 +
1.332 + // Verify that the private slot is at the expected place
1.333 + JS_ASSERT(obj->numFixedSlots() == DATA_SLOT);
1.334 +#endif
1.335 +
1.336 + if (buffer)
1.337 + buffer->addView(obj);
1.338 +
1.339 + return obj;
1.340 + }
1.341 +
1.342 + static JSObject *
1.343 + makeInstance(JSContext *cx, Handle<ArrayBufferObject *> bufobj, uint32_t byteOffset, uint32_t len)
1.344 + {
1.345 + RootedObject nullproto(cx, nullptr);
1.346 + return makeInstance(cx, bufobj, byteOffset, len, nullproto);
1.347 + }
1.348 +
1.349 + /*
1.350 + * new [Type]Array(length)
1.351 + * new [Type]Array(otherTypedArray)
1.352 + * new [Type]Array(JSArray)
1.353 + * new [Type]Array(ArrayBuffer, [optional] byteOffset, [optional] length)
1.354 + */
1.355 + static bool
1.356 + class_constructor(JSContext *cx, unsigned argc, Value *vp)
1.357 + {
1.358 + /* N.B. this is a constructor for protoClass, not instanceClass! */
1.359 + CallArgs args = CallArgsFromVp(argc, vp);
1.360 + JSObject *obj = create(cx, args);
1.361 + if (!obj)
1.362 + return false;
1.363 + args.rval().setObject(*obj);
1.364 + return true;
1.365 + }
1.366 +
1.367 + static JSObject *
1.368 + create(JSContext *cx, const CallArgs& args)
1.369 + {
1.370 + /* () or (number) */
1.371 + uint32_t len = 0;
1.372 + if (args.length() == 0 || ValueIsLength(args[0], &len))
1.373 + return fromLength(cx, len);
1.374 +
1.375 + /* (not an object) */
1.376 + if (!args[0].isObject()) {
1.377 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.378 + return nullptr;
1.379 + }
1.380 +
1.381 + RootedObject dataObj(cx, &args.get(0).toObject());
1.382 +
1.383 + /*
1.384 + * (typedArray)
1.385 + * (type[] array)
1.386 + *
1.387 + * Otherwise create a new typed array and copy elements 0..len-1
1.388 + * properties from the object, treating it as some sort of array.
1.389 + * Note that offset and length will be ignored
1.390 + */
1.391 + if (!UncheckedUnwrap(dataObj)->is<ArrayBufferObject>() &&
1.392 + !UncheckedUnwrap(dataObj)->is<SharedArrayBufferObject>())
1.393 + {
1.394 + return fromArray(cx, dataObj);
1.395 + }
1.396 +
1.397 + /* (ArrayBuffer, [byteOffset, [length]]) */
1.398 + int32_t byteOffset = 0;
1.399 + int32_t length = -1;
1.400 +
1.401 + if (args.length() > 1) {
1.402 + if (!ToInt32(cx, args[1], &byteOffset))
1.403 + return nullptr;
1.404 + if (byteOffset < 0) {
1.405 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.406 + JSMSG_TYPED_ARRAY_NEGATIVE_ARG, "1");
1.407 + return nullptr;
1.408 + }
1.409 +
1.410 + if (args.length() > 2) {
1.411 + if (!ToInt32(cx, args[2], &length))
1.412 + return nullptr;
1.413 + if (length < 0) {
1.414 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.415 + JSMSG_TYPED_ARRAY_NEGATIVE_ARG, "2");
1.416 + return nullptr;
1.417 + }
1.418 + }
1.419 + }
1.420 +
1.421 + Rooted<JSObject*> proto(cx, nullptr);
1.422 + return fromBuffer(cx, dataObj, byteOffset, length, proto);
1.423 + }
1.424 +
1.425 + static bool IsThisClass(HandleValue v) {
1.426 + return v.isObject() && v.toObject().hasClass(instanceClass());
1.427 + }
1.428 +
1.429 + template<Value ValueGetter(TypedArrayObject *tarr)>
1.430 + static bool
1.431 + GetterImpl(JSContext *cx, CallArgs args)
1.432 + {
1.433 + JS_ASSERT(IsThisClass(args.thisv()));
1.434 + args.rval().set(ValueGetter(&args.thisv().toObject().as<TypedArrayObject>()));
1.435 + return true;
1.436 + }
1.437 +
1.438 + // ValueGetter is a function that takes an unwrapped typed array object and
1.439 + // returns a Value. Given such a function, Getter<> is a native that
1.440 + // retrieves a given Value, probably from a slot on the object.
1.441 + template<Value ValueGetter(TypedArrayObject *tarr)>
1.442 + static bool
1.443 + Getter(JSContext *cx, unsigned argc, Value *vp)
1.444 + {
1.445 + CallArgs args = CallArgsFromVp(argc, vp);
1.446 + return CallNonGenericMethod<ThisTypedArrayObject::IsThisClass,
1.447 + ThisTypedArrayObject::GetterImpl<ValueGetter> >(cx, args);
1.448 + }
1.449 +
1.450 + static bool
1.451 + BufferGetterImpl(JSContext *cx, CallArgs args)
1.452 + {
1.453 + JS_ASSERT(IsThisClass(args.thisv()));
1.454 + Rooted<TypedArrayObject *> tarray(cx, &args.thisv().toObject().as<TypedArrayObject>());
1.455 + if (!ensureHasBuffer(cx, tarray))
1.456 + return false;
1.457 + args.rval().set(bufferValue(tarray));
1.458 + return true;
1.459 + }
1.460 +
1.461 + // BufferGetter is a function that lazily constructs the array buffer for a
1.462 + // typed array before fetching it.
1.463 + static bool
1.464 + BufferGetter(JSContext *cx, unsigned argc, Value *vp)
1.465 + {
1.466 + CallArgs args = CallArgsFromVp(argc, vp);
1.467 + return CallNonGenericMethod<ThisTypedArrayObject::IsThisClass,
1.468 + ThisTypedArrayObject::BufferGetterImpl>(cx, args);
1.469 + }
1.470 +
1.471 + // Define an accessor for a read-only property that invokes a native getter
1.472 + static bool
1.473 + DefineGetter(JSContext *cx, HandleObject proto, PropertyName *name, Native native)
1.474 + {
1.475 + RootedId id(cx, NameToId(name));
1.476 + unsigned attrs = JSPROP_SHARED | JSPROP_GETTER | JSPROP_PERMANENT;
1.477 +
1.478 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.479 + JSObject *getter = NewFunction(cx, NullPtr(), native, 0,
1.480 + JSFunction::NATIVE_FUN, global, NullPtr());
1.481 + if (!getter)
1.482 + return false;
1.483 +
1.484 + return DefineNativeProperty(cx, proto, id, UndefinedHandleValue,
1.485 + JS_DATA_TO_FUNC_PTR(PropertyOp, getter), nullptr,
1.486 + attrs);
1.487 + }
1.488 +
1.489 + static
1.490 + bool defineGetters(JSContext *cx, HandleObject proto)
1.491 + {
1.492 + if (!DefineGetter(cx, proto, cx->names().length, Getter<lengthValue>))
1.493 + return false;
1.494 +
1.495 + if (!DefineGetter(cx, proto, cx->names().buffer, BufferGetter))
1.496 + return false;
1.497 +
1.498 + if (!DefineGetter(cx, proto, cx->names().byteLength, Getter<byteLengthValue>))
1.499 + return false;
1.500 +
1.501 + if (!DefineGetter(cx, proto, cx->names().byteOffset, Getter<byteOffsetValue>))
1.502 + return false;
1.503 +
1.504 + return true;
1.505 + }
1.506 +
1.507 + /* subarray(start[, end]) */
1.508 + static bool
1.509 + fun_subarray_impl(JSContext *cx, CallArgs args)
1.510 + {
1.511 + JS_ASSERT(IsThisClass(args.thisv()));
1.512 + Rooted<TypedArrayObject*> tarray(cx, &args.thisv().toObject().as<TypedArrayObject>());
1.513 +
1.514 + // these are the default values
1.515 + uint32_t length = tarray->length();
1.516 + uint32_t begin = 0, end = length;
1.517 +
1.518 + if (args.length() > 0) {
1.519 + if (!ToClampedIndex(cx, args[0], length, &begin))
1.520 + return false;
1.521 +
1.522 + if (args.length() > 1) {
1.523 + if (!ToClampedIndex(cx, args[1], length, &end))
1.524 + return false;
1.525 + }
1.526 + }
1.527 +
1.528 + if (begin > end)
1.529 + begin = end;
1.530 +
1.531 + JSObject *nobj = createSubarray(cx, tarray, begin, end);
1.532 + if (!nobj)
1.533 + return false;
1.534 + args.rval().setObject(*nobj);
1.535 + return true;
1.536 + }
1.537 +
1.538 + static bool
1.539 + fun_subarray(JSContext *cx, unsigned argc, Value *vp)
1.540 + {
1.541 + CallArgs args = CallArgsFromVp(argc, vp);
1.542 + return CallNonGenericMethod<ThisTypedArrayObject::IsThisClass,
1.543 + ThisTypedArrayObject::fun_subarray_impl>(cx, args);
1.544 + }
1.545 +
1.546 + /* move(begin, end, dest) */
1.547 + static bool
1.548 + fun_move_impl(JSContext *cx, CallArgs args)
1.549 + {
1.550 + JS_ASSERT(IsThisClass(args.thisv()));
1.551 + Rooted<TypedArrayObject*> tarray(cx, &args.thisv().toObject().as<TypedArrayObject>());
1.552 +
1.553 + if (args.length() < 3) {
1.554 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.555 + return false;
1.556 + }
1.557 +
1.558 + uint32_t srcBegin;
1.559 + uint32_t srcEnd;
1.560 + uint32_t dest;
1.561 +
1.562 + uint32_t originalLength = tarray->length();
1.563 + if (!ToClampedIndex(cx, args[0], originalLength, &srcBegin) ||
1.564 + !ToClampedIndex(cx, args[1], originalLength, &srcEnd) ||
1.565 + !ToClampedIndex(cx, args[2], originalLength, &dest))
1.566 + {
1.567 + return false;
1.568 + }
1.569 +
1.570 + if (srcBegin > srcEnd) {
1.571 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_INDEX);
1.572 + return false;
1.573 + }
1.574 +
1.575 + uint32_t lengthDuringMove = tarray->length(); // beware ToClampedIndex
1.576 + uint32_t nelts = srcEnd - srcBegin;
1.577 +
1.578 + MOZ_ASSERT(dest <= INT32_MAX, "size limited to 2**31");
1.579 + MOZ_ASSERT(nelts <= INT32_MAX, "size limited to 2**31");
1.580 + if (dest + nelts > lengthDuringMove || srcEnd > lengthDuringMove) {
1.581 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.582 + return false;
1.583 + }
1.584 +
1.585 + uint32_t byteDest = dest * sizeof(NativeType);
1.586 + uint32_t byteSrc = srcBegin * sizeof(NativeType);
1.587 + uint32_t byteSize = nelts * sizeof(NativeType);
1.588 +
1.589 +#ifdef DEBUG
1.590 + uint32_t viewByteLength = tarray->byteLength();
1.591 + JS_ASSERT(byteDest <= viewByteLength);
1.592 + JS_ASSERT(byteSrc <= viewByteLength);
1.593 + JS_ASSERT(byteDest + byteSize <= viewByteLength);
1.594 + JS_ASSERT(byteSrc + byteSize <= viewByteLength);
1.595 +
1.596 + // Should not overflow because size is limited to 2^31
1.597 + JS_ASSERT(byteDest + byteSize >= byteDest);
1.598 + JS_ASSERT(byteSrc + byteSize >= byteSrc);
1.599 +#endif
1.600 +
1.601 + uint8_t *data = static_cast<uint8_t*>(tarray->viewData());
1.602 + memmove(&data[byteDest], &data[byteSrc], byteSize);
1.603 + args.rval().setUndefined();
1.604 + return true;
1.605 + }
1.606 +
1.607 + static bool
1.608 + fun_move(JSContext *cx, unsigned argc, Value *vp)
1.609 + {
1.610 + CallArgs args = CallArgsFromVp(argc, vp);
1.611 + return CallNonGenericMethod<ThisTypedArrayObject::IsThisClass,
1.612 + ThisTypedArrayObject::fun_move_impl>(cx, args);
1.613 + }
1.614 +
1.615 + /* set(array[, offset]) */
1.616 + static bool
1.617 + fun_set_impl(JSContext *cx, CallArgs args)
1.618 + {
1.619 + JS_ASSERT(IsThisClass(args.thisv()));
1.620 + Rooted<TypedArrayObject*> tarray(cx, &args.thisv().toObject().as<TypedArrayObject>());
1.621 +
1.622 + // first arg must be either a typed array or a JS array
1.623 + if (args.length() == 0 || !args[0].isObject()) {
1.624 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.625 + return false;
1.626 + }
1.627 +
1.628 + int32_t offset = 0;
1.629 + if (args.length() > 1) {
1.630 + if (!ToInt32(cx, args[1], &offset))
1.631 + return false;
1.632 +
1.633 + if (offset < 0 || uint32_t(offset) > tarray->length()) {
1.634 + // the given offset is bogus
1.635 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.636 + JSMSG_TYPED_ARRAY_BAD_INDEX, "2");
1.637 + return false;
1.638 + }
1.639 + }
1.640 +
1.641 + if (!args[0].isObject()) {
1.642 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.643 + return false;
1.644 + }
1.645 +
1.646 + RootedObject arg0(cx, args[0].toObjectOrNull());
1.647 + if (arg0->is<TypedArrayObject>()) {
1.648 + if (arg0->as<TypedArrayObject>().length() > tarray->length() - offset) {
1.649 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
1.650 + return false;
1.651 + }
1.652 +
1.653 + if (!copyFromTypedArray(cx, tarray, arg0, offset))
1.654 + return false;
1.655 + } else {
1.656 + uint32_t len;
1.657 + if (!GetLengthProperty(cx, arg0, &len))
1.658 + return false;
1.659 +
1.660 + if (uint32_t(offset) > tarray->length() || len > tarray->length() - offset) {
1.661 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_ARRAY_LENGTH);
1.662 + return false;
1.663 + }
1.664 +
1.665 + if (!copyFromArray(cx, tarray, arg0, len, offset))
1.666 + return false;
1.667 + }
1.668 +
1.669 + args.rval().setUndefined();
1.670 + return true;
1.671 + }
1.672 +
1.673 + static bool
1.674 + fun_set(JSContext *cx, unsigned argc, Value *vp)
1.675 + {
1.676 + CallArgs args = CallArgsFromVp(argc, vp);
1.677 + return CallNonGenericMethod<ThisTypedArrayObject::IsThisClass,
1.678 + ThisTypedArrayObject::fun_set_impl>(cx, args);
1.679 + }
1.680 +
1.681 + public:
1.682 + static JSObject *
1.683 + fromBuffer(JSContext *cx, HandleObject bufobj, uint32_t byteOffset, int32_t lengthInt,
1.684 + HandleObject proto)
1.685 + {
1.686 + if (!ObjectClassIs(bufobj, ESClass_ArrayBuffer, cx)) {
1.687 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.688 + return nullptr; // must be arrayBuffer
1.689 + }
1.690 +
1.691 + JS_ASSERT(IsArrayBuffer(bufobj) || bufobj->is<ProxyObject>());
1.692 + if (bufobj->is<ProxyObject>()) {
1.693 + /*
1.694 + * Normally, NonGenericMethodGuard handles the case of transparent
1.695 + * wrappers. However, we have a peculiar situation: we want to
1.696 + * construct the new typed array in the compartment of the buffer,
1.697 + * so that the typed array can point directly at their buffer's
1.698 + * data without crossing compartment boundaries. So we use the
1.699 + * machinery underlying NonGenericMethodGuard directly to proxy the
1.700 + * native call. We will end up with a wrapper in the origin
1.701 + * compartment for a view in the target compartment referencing the
1.702 + * ArrayBufferObject in that same compartment.
1.703 + */
1.704 + JSObject *wrapped = CheckedUnwrap(bufobj);
1.705 + if (!wrapped) {
1.706 + JS_ReportError(cx, "Permission denied to access object");
1.707 + return nullptr;
1.708 + }
1.709 + if (IsArrayBuffer(wrapped)) {
1.710 + /*
1.711 + * And for even more fun, the new view's prototype should be
1.712 + * set to the origin compartment's prototype object, not the
1.713 + * target's (specifically, the actual view in the target
1.714 + * compartment will use as its prototype a wrapper around the
1.715 + * origin compartment's view.prototype object).
1.716 + *
1.717 + * Rather than hack some crazy solution together, implement
1.718 + * this all using a private helper function, created when
1.719 + * ArrayBufferObject was initialized and cached in the global.
1.720 + * This reuses all the existing cross-compartment crazy so we
1.721 + * don't have to do anything *uniquely* crazy here.
1.722 + */
1.723 +
1.724 + Rooted<JSObject*> proto(cx);
1.725 + if (!GetBuiltinPrototype(cx, JSCLASS_CACHED_PROTO_KEY(instanceClass()), &proto))
1.726 + return nullptr;
1.727 +
1.728 + InvokeArgs args(cx);
1.729 + if (!args.init(3))
1.730 + return nullptr;
1.731 +
1.732 + args.setCallee(cx->compartment()->maybeGlobal()->createArrayFromBuffer<NativeType>());
1.733 + args.setThis(ObjectValue(*bufobj));
1.734 + args[0].setNumber(byteOffset);
1.735 + args[1].setInt32(lengthInt);
1.736 + args[2].setObject(*proto);
1.737 +
1.738 + if (!Invoke(cx, args))
1.739 + return nullptr;
1.740 + return &args.rval().toObject();
1.741 + }
1.742 + }
1.743 +
1.744 + if (!IsArrayBuffer(bufobj)) {
1.745 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.746 + return nullptr; // must be arrayBuffer
1.747 + }
1.748 +
1.749 + Rooted<ArrayBufferObject *> buffer(cx, &AsArrayBuffer(bufobj));
1.750 +
1.751 + if (byteOffset > buffer->byteLength() || byteOffset % sizeof(NativeType) != 0) {
1.752 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.753 + return nullptr; // invalid byteOffset
1.754 + }
1.755 +
1.756 + uint32_t len;
1.757 + if (lengthInt == -1) {
1.758 + len = (buffer->byteLength() - byteOffset) / sizeof(NativeType);
1.759 + if (len * sizeof(NativeType) != buffer->byteLength() - byteOffset) {
1.760 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.761 + JSMSG_TYPED_ARRAY_BAD_ARGS);
1.762 + return nullptr; // given byte array doesn't map exactly to sizeof(NativeType) * N
1.763 + }
1.764 + } else {
1.765 + len = uint32_t(lengthInt);
1.766 + }
1.767 +
1.768 + // Go slowly and check for overflow.
1.769 + uint32_t arrayByteLength = len * sizeof(NativeType);
1.770 + if (len >= INT32_MAX / sizeof(NativeType) || byteOffset >= INT32_MAX - arrayByteLength) {
1.771 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.772 + return nullptr; // overflow when calculating byteOffset + len * sizeof(NativeType)
1.773 + }
1.774 +
1.775 + if (arrayByteLength + byteOffset > buffer->byteLength()) {
1.776 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_TYPED_ARRAY_BAD_ARGS);
1.777 + return nullptr; // byteOffset + len is too big for the arraybuffer
1.778 + }
1.779 +
1.780 + return makeInstance(cx, buffer, byteOffset, len, proto);
1.781 + }
1.782 +
1.783 + static bool
1.784 + maybeCreateArrayBuffer(JSContext *cx, uint32_t nelements, MutableHandle<ArrayBufferObject *> buffer)
1.785 + {
1.786 + // Make sure that array elements evenly divide into the inline buffer's
1.787 + // size, for the test below.
1.788 + JS_STATIC_ASSERT((INLINE_BUFFER_LIMIT / sizeof(NativeType)) * sizeof(NativeType) == INLINE_BUFFER_LIMIT);
1.789 +
1.790 + if (nelements <= INLINE_BUFFER_LIMIT / sizeof(NativeType)) {
1.791 + // The array's data can be inline, and the buffer created lazily.
1.792 + return true;
1.793 + }
1.794 +
1.795 + if (nelements >= INT32_MAX / sizeof(NativeType)) {
1.796 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.797 + JSMSG_NEED_DIET, "size and count");
1.798 + return false;
1.799 + }
1.800 +
1.801 + buffer.set(ArrayBufferObject::create(cx, nelements * sizeof(NativeType)));
1.802 + return !!buffer;
1.803 + }
1.804 +
1.805 + static JSObject *
1.806 + fromLength(JSContext *cx, uint32_t nelements)
1.807 + {
1.808 + Rooted<ArrayBufferObject *> buffer(cx);
1.809 + if (!maybeCreateArrayBuffer(cx, nelements, &buffer))
1.810 + return nullptr;
1.811 + return makeInstance(cx, buffer, 0, nelements);
1.812 + }
1.813 +
1.814 + static JSObject *
1.815 + fromArray(JSContext *cx, HandleObject other)
1.816 + {
1.817 + uint32_t len;
1.818 + if (other->is<TypedArrayObject>()) {
1.819 + len = other->as<TypedArrayObject>().length();
1.820 + } else if (!GetLengthProperty(cx, other, &len)) {
1.821 + return nullptr;
1.822 + }
1.823 +
1.824 + Rooted<ArrayBufferObject *> buffer(cx);
1.825 + if (!maybeCreateArrayBuffer(cx, len, &buffer))
1.826 + return nullptr;
1.827 +
1.828 + RootedObject obj(cx, makeInstance(cx, buffer, 0, len));
1.829 + if (!obj || !copyFromArray(cx, obj, other, len))
1.830 + return nullptr;
1.831 + return obj;
1.832 + }
1.833 +
1.834 + static const NativeType
1.835 + getIndex(JSObject *obj, uint32_t index)
1.836 + {
1.837 + TypedArrayObject &tarray = obj->as<TypedArrayObject>();
1.838 + MOZ_ASSERT(index < tarray.length());
1.839 + return static_cast<const NativeType*>(tarray.viewData())[index];
1.840 + }
1.841 +
1.842 + static void
1.843 + setIndex(TypedArrayObject &tarray, uint32_t index, NativeType val)
1.844 + {
1.845 + MOZ_ASSERT(index < tarray.length());
1.846 + static_cast<NativeType*>(tarray.viewData())[index] = val;
1.847 + }
1.848 +
1.849 + static Value getIndexValue(JSObject *tarray, uint32_t index);
1.850 +
1.851 + static JSObject *
1.852 + createSubarray(JSContext *cx, HandleObject tarrayArg, uint32_t begin, uint32_t end)
1.853 + {
1.854 + Rooted<TypedArrayObject*> tarray(cx, &tarrayArg->as<TypedArrayObject>());
1.855 +
1.856 + if (begin > tarray->length() || end > tarray->length() || begin > end) {
1.857 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_INDEX);
1.858 + return nullptr;
1.859 + }
1.860 +
1.861 + if (!ensureHasBuffer(cx, tarray))
1.862 + return nullptr;
1.863 +
1.864 + Rooted<ArrayBufferObject *> bufobj(cx, tarray->buffer());
1.865 + JS_ASSERT(bufobj);
1.866 +
1.867 + uint32_t length = end - begin;
1.868 +
1.869 + JS_ASSERT(begin < UINT32_MAX / sizeof(NativeType));
1.870 + uint32_t arrayByteOffset = tarray->byteOffset();
1.871 + JS_ASSERT(UINT32_MAX - begin * sizeof(NativeType) >= arrayByteOffset);
1.872 + uint32_t byteOffset = arrayByteOffset + begin * sizeof(NativeType);
1.873 +
1.874 + return makeInstance(cx, bufobj, byteOffset, length);
1.875 + }
1.876 +
1.877 + protected:
1.878 + static NativeType
1.879 + doubleToNative(double d)
1.880 + {
1.881 + if (TypeIsFloatingPoint<NativeType>()) {
1.882 +#ifdef JS_MORE_DETERMINISTIC
1.883 + // The JS spec doesn't distinguish among different NaN values, and
1.884 + // it deliberately doesn't specify the bit pattern written to a
1.885 + // typed array when NaN is written into it. This bit-pattern
1.886 + // inconsistency could confuse deterministic testing, so always
1.887 + // canonicalize NaN values in more-deterministic builds.
1.888 + d = CanonicalizeNaN(d);
1.889 +#endif
1.890 + return NativeType(d);
1.891 + }
1.892 + if (MOZ_UNLIKELY(IsNaN(d)))
1.893 + return NativeType(0);
1.894 + if (TypeIsUnsigned<NativeType>())
1.895 + return NativeType(ToUint32(d));
1.896 + return NativeType(ToInt32(d));
1.897 + }
1.898 +
1.899 + static bool
1.900 + canConvertInfallibly(const Value &v)
1.901 + {
1.902 + return v.isNumber() || v.isBoolean() || v.isNull() || v.isUndefined();
1.903 + }
1.904 +
1.905 + static NativeType
1.906 + infallibleValueToNative(const Value &v)
1.907 + {
1.908 + if (v.isInt32())
1.909 + return v.toInt32();
1.910 + if (v.isDouble())
1.911 + return doubleToNative(v.toDouble());
1.912 + if (v.isBoolean())
1.913 + return v.toBoolean();
1.914 + if (v.isNull())
1.915 + return 0;
1.916 +
1.917 + MOZ_ASSERT(v.isUndefined());
1.918 + return ArrayTypeIsFloatingPoint() ? NativeType(GenericNaN()) : NativeType(0);
1.919 + }
1.920 +
1.921 + static bool
1.922 + valueToNative(JSContext *cx, const Value &v, NativeType *result)
1.923 + {
1.924 + MOZ_ASSERT(!v.isMagic());
1.925 +
1.926 + if (MOZ_LIKELY(canConvertInfallibly(v))) {
1.927 + *result = infallibleValueToNative(v);
1.928 + return true;
1.929 + }
1.930 +
1.931 + double d;
1.932 + MOZ_ASSERT(v.isString() || v.isObject());
1.933 + if (!(v.isString() ? StringToNumber(cx, v.toString(), &d) : ToNumber(cx, v, &d)))
1.934 + return false;
1.935 +
1.936 + *result = doubleToNative(d);
1.937 + return true;
1.938 + }
1.939 +
1.940 + static bool
1.941 + copyFromArray(JSContext *cx, HandleObject thisTypedArrayObj,
1.942 + HandleObject source, uint32_t len, uint32_t offset = 0)
1.943 + {
1.944 + Rooted<TypedArrayObject*> thisTypedArray(cx, &thisTypedArrayObj->as<TypedArrayObject>());
1.945 + JS_ASSERT(offset <= thisTypedArray->length());
1.946 + JS_ASSERT(len <= thisTypedArray->length() - offset);
1.947 + if (source->is<TypedArrayObject>())
1.948 + return copyFromTypedArray(cx, thisTypedArray, source, offset);
1.949 +
1.950 + uint32_t i = 0;
1.951 + if (source->isNative()) {
1.952 + // Attempt fast-path infallible conversion of dense elements up to
1.953 + // the first potentially side-effectful lookup or conversion.
1.954 + uint32_t bound = Min(source->getDenseInitializedLength(), len);
1.955 +
1.956 + NativeType *dest = static_cast<NativeType*>(thisTypedArray->viewData()) + offset;
1.957 +
1.958 + const Value *srcValues = source->getDenseElements();
1.959 + for (; i < bound; i++) {
1.960 + // Note: holes don't convert infallibly.
1.961 + if (!canConvertInfallibly(srcValues[i]))
1.962 + break;
1.963 + dest[i] = infallibleValueToNative(srcValues[i]);
1.964 + }
1.965 + if (i == len)
1.966 + return true;
1.967 + }
1.968 +
1.969 + // Convert and copy any remaining elements generically.
1.970 + RootedValue v(cx);
1.971 + for (; i < len; i++) {
1.972 + if (!JSObject::getElement(cx, source, source, i, &v))
1.973 + return false;
1.974 +
1.975 + NativeType n;
1.976 + if (!valueToNative(cx, v, &n))
1.977 + return false;
1.978 +
1.979 + len = Min(len, thisTypedArray->length());
1.980 + if (i >= len)
1.981 + break;
1.982 +
1.983 + // Compute every iteration in case getElement acts wacky.
1.984 + void *data = thisTypedArray->viewData();
1.985 + static_cast<NativeType*>(data)[offset + i] = n;
1.986 + }
1.987 +
1.988 + return true;
1.989 + }
1.990 +
1.991 + static bool
1.992 + copyFromTypedArray(JSContext *cx, JSObject *thisTypedArrayObj, JSObject *tarrayObj,
1.993 + uint32_t offset)
1.994 + {
1.995 + TypedArrayObject *thisTypedArray = &thisTypedArrayObj->as<TypedArrayObject>();
1.996 + TypedArrayObject *tarray = &tarrayObj->as<TypedArrayObject>();
1.997 + JS_ASSERT(offset <= thisTypedArray->length());
1.998 + JS_ASSERT(tarray->length() <= thisTypedArray->length() - offset);
1.999 + if (tarray->buffer() == thisTypedArray->buffer())
1.1000 + return copyFromWithOverlap(cx, thisTypedArray, tarray, offset);
1.1001 +
1.1002 + NativeType *dest = static_cast<NativeType*>(thisTypedArray->viewData()) + offset;
1.1003 +
1.1004 + if (tarray->type() == thisTypedArray->type()) {
1.1005 + js_memcpy(dest, tarray->viewData(), tarray->byteLength());
1.1006 + return true;
1.1007 + }
1.1008 +
1.1009 + unsigned srclen = tarray->length();
1.1010 + switch (tarray->type()) {
1.1011 + case ScalarTypeDescr::TYPE_INT8: {
1.1012 + int8_t *src = static_cast<int8_t*>(tarray->viewData());
1.1013 + for (unsigned i = 0; i < srclen; ++i)
1.1014 + *dest++ = NativeType(*src++);
1.1015 + break;
1.1016 + }
1.1017 + case ScalarTypeDescr::TYPE_UINT8:
1.1018 + case ScalarTypeDescr::TYPE_UINT8_CLAMPED: {
1.1019 + uint8_t *src = static_cast<uint8_t*>(tarray->viewData());
1.1020 + for (unsigned i = 0; i < srclen; ++i)
1.1021 + *dest++ = NativeType(*src++);
1.1022 + break;
1.1023 + }
1.1024 + case ScalarTypeDescr::TYPE_INT16: {
1.1025 + int16_t *src = static_cast<int16_t*>(tarray->viewData());
1.1026 + for (unsigned i = 0; i < srclen; ++i)
1.1027 + *dest++ = NativeType(*src++);
1.1028 + break;
1.1029 + }
1.1030 + case ScalarTypeDescr::TYPE_UINT16: {
1.1031 + uint16_t *src = static_cast<uint16_t*>(tarray->viewData());
1.1032 + for (unsigned i = 0; i < srclen; ++i)
1.1033 + *dest++ = NativeType(*src++);
1.1034 + break;
1.1035 + }
1.1036 + case ScalarTypeDescr::TYPE_INT32: {
1.1037 + int32_t *src = static_cast<int32_t*>(tarray->viewData());
1.1038 + for (unsigned i = 0; i < srclen; ++i)
1.1039 + *dest++ = NativeType(*src++);
1.1040 + break;
1.1041 + }
1.1042 + case ScalarTypeDescr::TYPE_UINT32: {
1.1043 + uint32_t *src = static_cast<uint32_t*>(tarray->viewData());
1.1044 + for (unsigned i = 0; i < srclen; ++i)
1.1045 + *dest++ = NativeType(*src++);
1.1046 + break;
1.1047 + }
1.1048 + case ScalarTypeDescr::TYPE_FLOAT32: {
1.1049 + float *src = static_cast<float*>(tarray->viewData());
1.1050 + for (unsigned i = 0; i < srclen; ++i)
1.1051 + *dest++ = NativeType(*src++);
1.1052 + break;
1.1053 + }
1.1054 + case ScalarTypeDescr::TYPE_FLOAT64: {
1.1055 + double *src = static_cast<double*>(tarray->viewData());
1.1056 + for (unsigned i = 0; i < srclen; ++i)
1.1057 + *dest++ = NativeType(*src++);
1.1058 + break;
1.1059 + }
1.1060 + default:
1.1061 + MOZ_ASSUME_UNREACHABLE("copyFrom with a TypedArrayObject of unknown type");
1.1062 + }
1.1063 +
1.1064 + return true;
1.1065 + }
1.1066 +
1.1067 + static bool
1.1068 + copyFromWithOverlap(JSContext *cx, JSObject *selfObj, JSObject *tarrayObj, uint32_t offset)
1.1069 + {
1.1070 + TypedArrayObject *self = &selfObj->as<TypedArrayObject>();
1.1071 + TypedArrayObject *tarray = &tarrayObj->as<TypedArrayObject>();
1.1072 +
1.1073 + JS_ASSERT(offset <= self->length());
1.1074 +
1.1075 + NativeType *dest = static_cast<NativeType*>(self->viewData()) + offset;
1.1076 + uint32_t byteLength = tarray->byteLength();
1.1077 +
1.1078 + if (tarray->type() == self->type()) {
1.1079 + memmove(dest, tarray->viewData(), byteLength);
1.1080 + return true;
1.1081 + }
1.1082 +
1.1083 + // We have to make a copy of the source array here, since
1.1084 + // there's overlap, and we have to convert types.
1.1085 + void *srcbuf = cx->malloc_(byteLength);
1.1086 + if (!srcbuf)
1.1087 + return false;
1.1088 + js_memcpy(srcbuf, tarray->viewData(), byteLength);
1.1089 +
1.1090 + uint32_t len = tarray->length();
1.1091 + switch (tarray->type()) {
1.1092 + case ScalarTypeDescr::TYPE_INT8: {
1.1093 + int8_t *src = (int8_t*) srcbuf;
1.1094 + for (unsigned i = 0; i < len; ++i)
1.1095 + *dest++ = NativeType(*src++);
1.1096 + break;
1.1097 + }
1.1098 + case ScalarTypeDescr::TYPE_UINT8:
1.1099 + case ScalarTypeDescr::TYPE_UINT8_CLAMPED: {
1.1100 + uint8_t *src = (uint8_t*) srcbuf;
1.1101 + for (unsigned i = 0; i < len; ++i)
1.1102 + *dest++ = NativeType(*src++);
1.1103 + break;
1.1104 + }
1.1105 + case ScalarTypeDescr::TYPE_INT16: {
1.1106 + int16_t *src = (int16_t*) srcbuf;
1.1107 + for (unsigned i = 0; i < len; ++i)
1.1108 + *dest++ = NativeType(*src++);
1.1109 + break;
1.1110 + }
1.1111 + case ScalarTypeDescr::TYPE_UINT16: {
1.1112 + uint16_t *src = (uint16_t*) srcbuf;
1.1113 + for (unsigned i = 0; i < len; ++i)
1.1114 + *dest++ = NativeType(*src++);
1.1115 + break;
1.1116 + }
1.1117 + case ScalarTypeDescr::TYPE_INT32: {
1.1118 + int32_t *src = (int32_t*) srcbuf;
1.1119 + for (unsigned i = 0; i < len; ++i)
1.1120 + *dest++ = NativeType(*src++);
1.1121 + break;
1.1122 + }
1.1123 + case ScalarTypeDescr::TYPE_UINT32: {
1.1124 + uint32_t *src = (uint32_t*) srcbuf;
1.1125 + for (unsigned i = 0; i < len; ++i)
1.1126 + *dest++ = NativeType(*src++);
1.1127 + break;
1.1128 + }
1.1129 + case ScalarTypeDescr::TYPE_FLOAT32: {
1.1130 + float *src = (float*) srcbuf;
1.1131 + for (unsigned i = 0; i < len; ++i)
1.1132 + *dest++ = NativeType(*src++);
1.1133 + break;
1.1134 + }
1.1135 + case ScalarTypeDescr::TYPE_FLOAT64: {
1.1136 + double *src = (double*) srcbuf;
1.1137 + for (unsigned i = 0; i < len; ++i)
1.1138 + *dest++ = NativeType(*src++);
1.1139 + break;
1.1140 + }
1.1141 + default:
1.1142 + MOZ_ASSUME_UNREACHABLE("copyFromWithOverlap with a TypedArrayObject of unknown type");
1.1143 + }
1.1144 +
1.1145 + js_free(srcbuf);
1.1146 + return true;
1.1147 + }
1.1148 +};
1.1149 +
1.1150 +class Int8ArrayObject : public TypedArrayObjectTemplate<int8_t> {
1.1151 + public:
1.1152 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_INT8 };
1.1153 + static const JSProtoKey key = JSProto_Int8Array;
1.1154 + static const JSFunctionSpec jsfuncs[];
1.1155 +};
1.1156 +class Uint8ArrayObject : public TypedArrayObjectTemplate<uint8_t> {
1.1157 + public:
1.1158 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_UINT8 };
1.1159 + static const JSProtoKey key = JSProto_Uint8Array;
1.1160 + static const JSFunctionSpec jsfuncs[];
1.1161 +};
1.1162 +class Int16ArrayObject : public TypedArrayObjectTemplate<int16_t> {
1.1163 + public:
1.1164 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_INT16 };
1.1165 + static const JSProtoKey key = JSProto_Int16Array;
1.1166 + static const JSFunctionSpec jsfuncs[];
1.1167 +};
1.1168 +class Uint16ArrayObject : public TypedArrayObjectTemplate<uint16_t> {
1.1169 + public:
1.1170 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_UINT16 };
1.1171 + static const JSProtoKey key = JSProto_Uint16Array;
1.1172 + static const JSFunctionSpec jsfuncs[];
1.1173 +};
1.1174 +class Int32ArrayObject : public TypedArrayObjectTemplate<int32_t> {
1.1175 + public:
1.1176 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_INT32 };
1.1177 + static const JSProtoKey key = JSProto_Int32Array;
1.1178 + static const JSFunctionSpec jsfuncs[];
1.1179 +};
1.1180 +class Uint32ArrayObject : public TypedArrayObjectTemplate<uint32_t> {
1.1181 + public:
1.1182 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_UINT32 };
1.1183 + static const JSProtoKey key = JSProto_Uint32Array;
1.1184 + static const JSFunctionSpec jsfuncs[];
1.1185 +};
1.1186 +class Float32ArrayObject : public TypedArrayObjectTemplate<float> {
1.1187 + public:
1.1188 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_FLOAT32 };
1.1189 + static const JSProtoKey key = JSProto_Float32Array;
1.1190 + static const JSFunctionSpec jsfuncs[];
1.1191 +};
1.1192 +class Float64ArrayObject : public TypedArrayObjectTemplate<double> {
1.1193 + public:
1.1194 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_FLOAT64 };
1.1195 + static const JSProtoKey key = JSProto_Float64Array;
1.1196 + static const JSFunctionSpec jsfuncs[];
1.1197 +};
1.1198 +class Uint8ClampedArrayObject : public TypedArrayObjectTemplate<uint8_clamped> {
1.1199 + public:
1.1200 + enum { ACTUAL_TYPE = ScalarTypeDescr::TYPE_UINT8_CLAMPED };
1.1201 + static const JSProtoKey key = JSProto_Uint8ClampedArray;
1.1202 + static const JSFunctionSpec jsfuncs[];
1.1203 +};
1.1204 +
1.1205 +} /* anonymous namespace */
1.1206 +
1.1207 +template<typename T>
1.1208 +bool
1.1209 +ArrayBufferObject::createTypedArrayFromBufferImpl(JSContext *cx, CallArgs args)
1.1210 +{
1.1211 + typedef TypedArrayObjectTemplate<T> ArrayType;
1.1212 + JS_ASSERT(IsArrayBuffer(args.thisv()));
1.1213 + JS_ASSERT(args.length() == 3);
1.1214 +
1.1215 + Rooted<JSObject*> buffer(cx, &args.thisv().toObject());
1.1216 + Rooted<JSObject*> proto(cx, &args[2].toObject());
1.1217 +
1.1218 + Rooted<JSObject*> obj(cx);
1.1219 + double byteOffset = args[0].toNumber();
1.1220 + MOZ_ASSERT(0 <= byteOffset);
1.1221 + MOZ_ASSERT(byteOffset <= UINT32_MAX);
1.1222 + MOZ_ASSERT(byteOffset == uint32_t(byteOffset));
1.1223 + obj = ArrayType::fromBuffer(cx, buffer, uint32_t(byteOffset), args[1].toInt32(), proto);
1.1224 + if (!obj)
1.1225 + return false;
1.1226 + args.rval().setObject(*obj);
1.1227 + return true;
1.1228 +}
1.1229 +
1.1230 +template<typename T>
1.1231 +bool
1.1232 +ArrayBufferObject::createTypedArrayFromBuffer(JSContext *cx, unsigned argc, Value *vp)
1.1233 +{
1.1234 + CallArgs args = CallArgsFromVp(argc, vp);
1.1235 + return CallNonGenericMethod<IsArrayBuffer, createTypedArrayFromBufferImpl<T> >(cx, args);
1.1236 +}
1.1237 +
1.1238 +// this default implementation is only valid for integer types
1.1239 +// less than 32-bits in size.
1.1240 +template<typename NativeType>
1.1241 +Value
1.1242 +TypedArrayObjectTemplate<NativeType>::getIndexValue(JSObject *tarray, uint32_t index)
1.1243 +{
1.1244 + JS_STATIC_ASSERT(sizeof(NativeType) < 4);
1.1245 +
1.1246 + return Int32Value(getIndex(tarray, index));
1.1247 +}
1.1248 +
1.1249 +namespace {
1.1250 +
1.1251 +// and we need to specialize for 32-bit integers and floats
1.1252 +template<>
1.1253 +Value
1.1254 +TypedArrayObjectTemplate<int32_t>::getIndexValue(JSObject *tarray, uint32_t index)
1.1255 +{
1.1256 + return Int32Value(getIndex(tarray, index));
1.1257 +}
1.1258 +
1.1259 +template<>
1.1260 +Value
1.1261 +TypedArrayObjectTemplate<uint32_t>::getIndexValue(JSObject *tarray, uint32_t index)
1.1262 +{
1.1263 + uint32_t val = getIndex(tarray, index);
1.1264 + return NumberValue(val);
1.1265 +}
1.1266 +
1.1267 +template<>
1.1268 +Value
1.1269 +TypedArrayObjectTemplate<float>::getIndexValue(JSObject *tarray, uint32_t index)
1.1270 +{
1.1271 + float val = getIndex(tarray, index);
1.1272 + double dval = val;
1.1273 +
1.1274 + /*
1.1275 + * Doubles in typed arrays could be typed-punned arrays of integers. This
1.1276 + * could allow user code to break the engine-wide invariant that only
1.1277 + * canonical nans are stored into jsvals, which means user code could
1.1278 + * confuse the engine into interpreting a double-typed jsval as an
1.1279 + * object-typed jsval.
1.1280 + *
1.1281 + * This could be removed for platforms/compilers known to convert a 32-bit
1.1282 + * non-canonical nan to a 64-bit canonical nan.
1.1283 + */
1.1284 + return DoubleValue(CanonicalizeNaN(dval));
1.1285 +}
1.1286 +
1.1287 +template<>
1.1288 +Value
1.1289 +TypedArrayObjectTemplate<double>::getIndexValue(JSObject *tarray, uint32_t index)
1.1290 +{
1.1291 + double val = getIndex(tarray, index);
1.1292 +
1.1293 + /*
1.1294 + * Doubles in typed arrays could be typed-punned arrays of integers. This
1.1295 + * could allow user code to break the engine-wide invariant that only
1.1296 + * canonical nans are stored into jsvals, which means user code could
1.1297 + * confuse the engine into interpreting a double-typed jsval as an
1.1298 + * object-typed jsval.
1.1299 + */
1.1300 + return DoubleValue(CanonicalizeNaN(val));
1.1301 +}
1.1302 +
1.1303 +} /* anonymous namespace */
1.1304 +
1.1305 +static NewObjectKind
1.1306 +DataViewNewObjectKind(JSContext *cx, uint32_t byteLength, JSObject *proto)
1.1307 +{
1.1308 + if (!proto && byteLength >= TypedArrayObject::SINGLETON_TYPE_BYTE_LENGTH)
1.1309 + return SingletonObject;
1.1310 + jsbytecode *pc;
1.1311 + JSScript *script = cx->currentScript(&pc);
1.1312 + if (!script)
1.1313 + return GenericObject;
1.1314 + return types::UseNewTypeForInitializer(script, pc, &DataViewObject::class_);
1.1315 +}
1.1316 +
1.1317 +inline DataViewObject *
1.1318 +DataViewObject::create(JSContext *cx, uint32_t byteOffset, uint32_t byteLength,
1.1319 + Handle<ArrayBufferObject*> arrayBuffer, JSObject *protoArg)
1.1320 +{
1.1321 + JS_ASSERT(byteOffset <= INT32_MAX);
1.1322 + JS_ASSERT(byteLength <= INT32_MAX);
1.1323 +
1.1324 + RootedObject proto(cx, protoArg);
1.1325 + RootedObject obj(cx);
1.1326 +
1.1327 + // This is overflow-safe: 2 * INT32_MAX is still a valid uint32_t.
1.1328 + if (byteOffset + byteLength > arrayBuffer->byteLength()) {
1.1329 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_ARG_INDEX_OUT_OF_RANGE, "1");
1.1330 + return nullptr;
1.1331 +
1.1332 + }
1.1333 +
1.1334 + NewObjectKind newKind = DataViewNewObjectKind(cx, byteLength, proto);
1.1335 + obj = NewBuiltinClassInstance(cx, &class_, newKind);
1.1336 + if (!obj)
1.1337 + return nullptr;
1.1338 +
1.1339 + if (proto) {
1.1340 + types::TypeObject *type = cx->getNewType(&class_, TaggedProto(proto));
1.1341 + if (!type)
1.1342 + return nullptr;
1.1343 + obj->setType(type);
1.1344 + } else if (byteLength >= TypedArrayObject::SINGLETON_TYPE_BYTE_LENGTH) {
1.1345 + JS_ASSERT(obj->hasSingletonType());
1.1346 + } else {
1.1347 + jsbytecode *pc;
1.1348 + RootedScript script(cx, cx->currentScript(&pc));
1.1349 + if (script) {
1.1350 + if (!types::SetInitializerObjectType(cx, script, pc, obj, newKind))
1.1351 + return nullptr;
1.1352 + }
1.1353 + }
1.1354 +
1.1355 + DataViewObject &dvobj = obj->as<DataViewObject>();
1.1356 + dvobj.setFixedSlot(BYTEOFFSET_SLOT, Int32Value(byteOffset));
1.1357 + dvobj.setFixedSlot(BYTELENGTH_SLOT, Int32Value(byteLength));
1.1358 + dvobj.setFixedSlot(BUFFER_SLOT, ObjectValue(*arrayBuffer));
1.1359 + dvobj.setFixedSlot(NEXT_VIEW_SLOT, PrivateValue(nullptr));
1.1360 + InitArrayBufferViewDataPointer(&dvobj, arrayBuffer, byteOffset);
1.1361 + JS_ASSERT(byteOffset + byteLength <= arrayBuffer->byteLength());
1.1362 +
1.1363 + // Verify that the private slot is at the expected place
1.1364 + JS_ASSERT(dvobj.numFixedSlots() == DATA_SLOT);
1.1365 +
1.1366 + arrayBuffer->addView(&dvobj);
1.1367 +
1.1368 + return &dvobj;
1.1369 +}
1.1370 +
1.1371 +bool
1.1372 +DataViewObject::construct(JSContext *cx, JSObject *bufobj, const CallArgs &args, HandleObject proto)
1.1373 +{
1.1374 + if (!IsArrayBuffer(bufobj)) {
1.1375 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
1.1376 + "DataView", "ArrayBuffer", bufobj->getClass()->name);
1.1377 + return false;
1.1378 + }
1.1379 +
1.1380 + Rooted<ArrayBufferObject*> buffer(cx, &AsArrayBuffer(bufobj));
1.1381 + uint32_t bufferLength = buffer->byteLength();
1.1382 + uint32_t byteOffset = 0;
1.1383 + uint32_t byteLength = bufferLength;
1.1384 +
1.1385 + if (args.length() > 1) {
1.1386 + if (!ToUint32(cx, args[1], &byteOffset))
1.1387 + return false;
1.1388 + if (byteOffset > INT32_MAX) {
1.1389 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.1390 + JSMSG_ARG_INDEX_OUT_OF_RANGE, "1");
1.1391 + return false;
1.1392 + }
1.1393 +
1.1394 + if (args.length() > 2) {
1.1395 + if (!ToUint32(cx, args[2], &byteLength))
1.1396 + return false;
1.1397 + if (byteLength > INT32_MAX) {
1.1398 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.1399 + JSMSG_ARG_INDEX_OUT_OF_RANGE, "2");
1.1400 + return false;
1.1401 + }
1.1402 + } else {
1.1403 + if (byteOffset > bufferLength) {
1.1404 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.1405 + JSMSG_ARG_INDEX_OUT_OF_RANGE, "1");
1.1406 + return false;
1.1407 + }
1.1408 +
1.1409 + byteLength = bufferLength - byteOffset;
1.1410 + }
1.1411 + }
1.1412 +
1.1413 + /* The sum of these cannot overflow a uint32_t */
1.1414 + JS_ASSERT(byteOffset <= INT32_MAX);
1.1415 + JS_ASSERT(byteLength <= INT32_MAX);
1.1416 +
1.1417 + if (byteOffset + byteLength > bufferLength) {
1.1418 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_ARG_INDEX_OUT_OF_RANGE, "1");
1.1419 + return false;
1.1420 + }
1.1421 +
1.1422 + JSObject *obj = DataViewObject::create(cx, byteOffset, byteLength, buffer, proto);
1.1423 + if (!obj)
1.1424 + return false;
1.1425 + args.rval().setObject(*obj);
1.1426 + return true;
1.1427 +}
1.1428 +
1.1429 +bool
1.1430 +DataViewObject::class_constructor(JSContext *cx, unsigned argc, Value *vp)
1.1431 +{
1.1432 + CallArgs args = CallArgsFromVp(argc, vp);
1.1433 +
1.1434 + RootedObject bufobj(cx);
1.1435 + if (!GetFirstArgumentAsObject(cx, args, "DataView constructor", &bufobj))
1.1436 + return false;
1.1437 +
1.1438 + if (bufobj->is<WrapperObject>() && IsArrayBuffer(UncheckedUnwrap(bufobj))) {
1.1439 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.1440 + Rooted<JSObject*> proto(cx, global->getOrCreateDataViewPrototype(cx));
1.1441 + if (!proto)
1.1442 + return false;
1.1443 +
1.1444 + InvokeArgs args2(cx);
1.1445 + if (!args2.init(args.length() + 1))
1.1446 + return false;
1.1447 + args2.setCallee(global->createDataViewForThis());
1.1448 + args2.setThis(ObjectValue(*bufobj));
1.1449 + PodCopy(args2.array(), args.array(), args.length());
1.1450 + args2[args.length()].setObject(*proto);
1.1451 + if (!Invoke(cx, args2))
1.1452 + return false;
1.1453 + args.rval().set(args2.rval());
1.1454 + return true;
1.1455 + }
1.1456 +
1.1457 + return construct(cx, bufobj, args, NullPtr());
1.1458 +}
1.1459 +
1.1460 +template <typename NativeType>
1.1461 +/* static */ uint8_t *
1.1462 +DataViewObject::getDataPointer(JSContext *cx, Handle<DataViewObject*> obj, uint32_t offset)
1.1463 +{
1.1464 + const size_t TypeSize = sizeof(NativeType);
1.1465 + if (offset > UINT32_MAX - TypeSize || offset + TypeSize > obj->byteLength()) {
1.1466 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_ARG_INDEX_OUT_OF_RANGE, "1");
1.1467 + return nullptr;
1.1468 + }
1.1469 +
1.1470 + return static_cast<uint8_t*>(obj->dataPointer()) + offset;
1.1471 +}
1.1472 +
1.1473 +static inline bool
1.1474 +needToSwapBytes(bool littleEndian)
1.1475 +{
1.1476 +#if IS_LITTLE_ENDIAN
1.1477 + return !littleEndian;
1.1478 +#else
1.1479 + return littleEndian;
1.1480 +#endif
1.1481 +}
1.1482 +
1.1483 +static inline uint8_t
1.1484 +swapBytes(uint8_t x)
1.1485 +{
1.1486 + return x;
1.1487 +}
1.1488 +
1.1489 +static inline uint16_t
1.1490 +swapBytes(uint16_t x)
1.1491 +{
1.1492 + return ((x & 0xff) << 8) | (x >> 8);
1.1493 +}
1.1494 +
1.1495 +static inline uint32_t
1.1496 +swapBytes(uint32_t x)
1.1497 +{
1.1498 + return ((x & 0xff) << 24) |
1.1499 + ((x & 0xff00) << 8) |
1.1500 + ((x & 0xff0000) >> 8) |
1.1501 + ((x & 0xff000000) >> 24);
1.1502 +}
1.1503 +
1.1504 +static inline uint64_t
1.1505 +swapBytes(uint64_t x)
1.1506 +{
1.1507 + uint32_t a = x & UINT32_MAX;
1.1508 + uint32_t b = x >> 32;
1.1509 + return (uint64_t(swapBytes(a)) << 32) | swapBytes(b);
1.1510 +}
1.1511 +
1.1512 +template <typename DataType> struct DataToRepType { typedef DataType result; };
1.1513 +template <> struct DataToRepType<int8_t> { typedef uint8_t result; };
1.1514 +template <> struct DataToRepType<uint8_t> { typedef uint8_t result; };
1.1515 +template <> struct DataToRepType<int16_t> { typedef uint16_t result; };
1.1516 +template <> struct DataToRepType<uint16_t> { typedef uint16_t result; };
1.1517 +template <> struct DataToRepType<int32_t> { typedef uint32_t result; };
1.1518 +template <> struct DataToRepType<uint32_t> { typedef uint32_t result; };
1.1519 +template <> struct DataToRepType<float> { typedef uint32_t result; };
1.1520 +template <> struct DataToRepType<double> { typedef uint64_t result; };
1.1521 +
1.1522 +template <typename DataType>
1.1523 +struct DataViewIO
1.1524 +{
1.1525 + typedef typename DataToRepType<DataType>::result ReadWriteType;
1.1526 +
1.1527 + static void fromBuffer(DataType *dest, const uint8_t *unalignedBuffer, bool wantSwap)
1.1528 + {
1.1529 + JS_ASSERT((reinterpret_cast<uintptr_t>(dest) & (Min<size_t>(MOZ_ALIGNOF(void*), sizeof(DataType)) - 1)) == 0);
1.1530 + memcpy((void *) dest, unalignedBuffer, sizeof(ReadWriteType));
1.1531 + if (wantSwap) {
1.1532 + ReadWriteType *rwDest = reinterpret_cast<ReadWriteType *>(dest);
1.1533 + *rwDest = swapBytes(*rwDest);
1.1534 + }
1.1535 + }
1.1536 +
1.1537 + static void toBuffer(uint8_t *unalignedBuffer, const DataType *src, bool wantSwap)
1.1538 + {
1.1539 + JS_ASSERT((reinterpret_cast<uintptr_t>(src) & (Min<size_t>(MOZ_ALIGNOF(void*), sizeof(DataType)) - 1)) == 0);
1.1540 + ReadWriteType temp = *reinterpret_cast<const ReadWriteType *>(src);
1.1541 + if (wantSwap)
1.1542 + temp = swapBytes(temp);
1.1543 + memcpy(unalignedBuffer, (void *) &temp, sizeof(ReadWriteType));
1.1544 + }
1.1545 +};
1.1546 +
1.1547 +template<typename NativeType>
1.1548 +/* static */ bool
1.1549 +DataViewObject::read(JSContext *cx, Handle<DataViewObject*> obj,
1.1550 + CallArgs &args, NativeType *val, const char *method)
1.1551 +{
1.1552 + if (args.length() < 1) {
1.1553 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.1554 + JSMSG_MORE_ARGS_NEEDED, method, "0", "s");
1.1555 + return false;
1.1556 + }
1.1557 +
1.1558 + uint32_t offset;
1.1559 + if (!ToUint32(cx, args[0], &offset))
1.1560 + return false;
1.1561 +
1.1562 + bool fromLittleEndian = args.length() >= 2 && ToBoolean(args[1]);
1.1563 +
1.1564 + uint8_t *data = DataViewObject::getDataPointer<NativeType>(cx, obj, offset);
1.1565 + if (!data)
1.1566 + return false;
1.1567 +
1.1568 + DataViewIO<NativeType>::fromBuffer(val, data, needToSwapBytes(fromLittleEndian));
1.1569 + return true;
1.1570 +}
1.1571 +
1.1572 +template <typename NativeType>
1.1573 +static inline bool
1.1574 +WebIDLCast(JSContext *cx, HandleValue value, NativeType *out)
1.1575 +{
1.1576 + int32_t temp;
1.1577 + if (!ToInt32(cx, value, &temp))
1.1578 + return false;
1.1579 + // Technically, the behavior of assigning an out of range value to a signed
1.1580 + // variable is undefined. In practice, compilers seem to do what we want
1.1581 + // without issuing any warnings.
1.1582 + *out = static_cast<NativeType>(temp);
1.1583 + return true;
1.1584 +}
1.1585 +
1.1586 +template <>
1.1587 +inline bool
1.1588 +WebIDLCast<float>(JSContext *cx, HandleValue value, float *out)
1.1589 +{
1.1590 + double temp;
1.1591 + if (!ToNumber(cx, value, &temp))
1.1592 + return false;
1.1593 + *out = static_cast<float>(temp);
1.1594 + return true;
1.1595 +}
1.1596 +
1.1597 +template <>
1.1598 +inline bool
1.1599 +WebIDLCast<double>(JSContext *cx, HandleValue value, double *out)
1.1600 +{
1.1601 + return ToNumber(cx, value, out);
1.1602 +}
1.1603 +
1.1604 +template<typename NativeType>
1.1605 +/* static */ bool
1.1606 +DataViewObject::write(JSContext *cx, Handle<DataViewObject*> obj,
1.1607 + CallArgs &args, const char *method)
1.1608 +{
1.1609 + if (args.length() < 2) {
1.1610 + JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
1.1611 + JSMSG_MORE_ARGS_NEEDED, method, "1", "");
1.1612 + return false;
1.1613 + }
1.1614 +
1.1615 + uint32_t offset;
1.1616 + if (!ToUint32(cx, args[0], &offset))
1.1617 + return false;
1.1618 +
1.1619 + NativeType value;
1.1620 + if (!WebIDLCast(cx, args[1], &value))
1.1621 + return false;
1.1622 +
1.1623 + bool toLittleEndian = args.length() >= 3 && ToBoolean(args[2]);
1.1624 +
1.1625 + uint8_t *data = DataViewObject::getDataPointer<NativeType>(cx, obj, offset);
1.1626 + if (!data)
1.1627 + return false;
1.1628 +
1.1629 + DataViewIO<NativeType>::toBuffer(data, &value, needToSwapBytes(toLittleEndian));
1.1630 + return true;
1.1631 +}
1.1632 +
1.1633 +bool
1.1634 +DataViewObject::getInt8Impl(JSContext *cx, CallArgs args)
1.1635 +{
1.1636 + JS_ASSERT(is(args.thisv()));
1.1637 +
1.1638 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1639 +
1.1640 + int8_t val;
1.1641 + if (!read(cx, thisView, args, &val, "getInt8"))
1.1642 + return false;
1.1643 + args.rval().setInt32(val);
1.1644 + return true;
1.1645 +}
1.1646 +
1.1647 +bool
1.1648 +DataViewObject::fun_getInt8(JSContext *cx, unsigned argc, Value *vp)
1.1649 +{
1.1650 + CallArgs args = CallArgsFromVp(argc, vp);
1.1651 + return CallNonGenericMethod<is, getInt8Impl>(cx, args);
1.1652 +}
1.1653 +
1.1654 +bool
1.1655 +DataViewObject::getUint8Impl(JSContext *cx, CallArgs args)
1.1656 +{
1.1657 + JS_ASSERT(is(args.thisv()));
1.1658 +
1.1659 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1660 +
1.1661 + uint8_t val;
1.1662 + if (!read(cx, thisView, args, &val, "getUint8"))
1.1663 + return false;
1.1664 + args.rval().setInt32(val);
1.1665 + return true;
1.1666 +}
1.1667 +
1.1668 +bool
1.1669 +DataViewObject::fun_getUint8(JSContext *cx, unsigned argc, Value *vp)
1.1670 +{
1.1671 + CallArgs args = CallArgsFromVp(argc, vp);
1.1672 + return CallNonGenericMethod<is, getUint8Impl>(cx, args);
1.1673 +}
1.1674 +
1.1675 +bool
1.1676 +DataViewObject::getInt16Impl(JSContext *cx, CallArgs args)
1.1677 +{
1.1678 + JS_ASSERT(is(args.thisv()));
1.1679 +
1.1680 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1681 +
1.1682 + int16_t val;
1.1683 + if (!read(cx, thisView, args, &val, "getInt16"))
1.1684 + return false;
1.1685 + args.rval().setInt32(val);
1.1686 + return true;
1.1687 +}
1.1688 +
1.1689 +bool
1.1690 +DataViewObject::fun_getInt16(JSContext *cx, unsigned argc, Value *vp)
1.1691 +{
1.1692 + CallArgs args = CallArgsFromVp(argc, vp);
1.1693 + return CallNonGenericMethod<is, getInt16Impl>(cx, args);
1.1694 +}
1.1695 +
1.1696 +bool
1.1697 +DataViewObject::getUint16Impl(JSContext *cx, CallArgs args)
1.1698 +{
1.1699 + JS_ASSERT(is(args.thisv()));
1.1700 +
1.1701 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1702 +
1.1703 + uint16_t val;
1.1704 + if (!read(cx, thisView, args, &val, "getUint16"))
1.1705 + return false;
1.1706 + args.rval().setInt32(val);
1.1707 + return true;
1.1708 +}
1.1709 +
1.1710 +bool
1.1711 +DataViewObject::fun_getUint16(JSContext *cx, unsigned argc, Value *vp)
1.1712 +{
1.1713 + CallArgs args = CallArgsFromVp(argc, vp);
1.1714 + return CallNonGenericMethod<is, getUint16Impl>(cx, args);
1.1715 +}
1.1716 +
1.1717 +bool
1.1718 +DataViewObject::getInt32Impl(JSContext *cx, CallArgs args)
1.1719 +{
1.1720 + JS_ASSERT(is(args.thisv()));
1.1721 +
1.1722 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1723 +
1.1724 + int32_t val;
1.1725 + if (!read(cx, thisView, args, &val, "getInt32"))
1.1726 + return false;
1.1727 + args.rval().setInt32(val);
1.1728 + return true;
1.1729 +}
1.1730 +
1.1731 +bool
1.1732 +DataViewObject::fun_getInt32(JSContext *cx, unsigned argc, Value *vp)
1.1733 +{
1.1734 + CallArgs args = CallArgsFromVp(argc, vp);
1.1735 + return CallNonGenericMethod<is, getInt32Impl>(cx, args);
1.1736 +}
1.1737 +
1.1738 +bool
1.1739 +DataViewObject::getUint32Impl(JSContext *cx, CallArgs args)
1.1740 +{
1.1741 + JS_ASSERT(is(args.thisv()));
1.1742 +
1.1743 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1744 +
1.1745 + uint32_t val;
1.1746 + if (!read(cx, thisView, args, &val, "getUint32"))
1.1747 + return false;
1.1748 + args.rval().setNumber(val);
1.1749 + return true;
1.1750 +}
1.1751 +
1.1752 +bool
1.1753 +DataViewObject::fun_getUint32(JSContext *cx, unsigned argc, Value *vp)
1.1754 +{
1.1755 + CallArgs args = CallArgsFromVp(argc, vp);
1.1756 + return CallNonGenericMethod<is, getUint32Impl>(cx, args);
1.1757 +}
1.1758 +
1.1759 +bool
1.1760 +DataViewObject::getFloat32Impl(JSContext *cx, CallArgs args)
1.1761 +{
1.1762 + JS_ASSERT(is(args.thisv()));
1.1763 +
1.1764 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1765 +
1.1766 + float val;
1.1767 + if (!read(cx, thisView, args, &val, "getFloat32"))
1.1768 + return false;
1.1769 +
1.1770 + args.rval().setDouble(CanonicalizeNaN(val));
1.1771 + return true;
1.1772 +}
1.1773 +
1.1774 +bool
1.1775 +DataViewObject::fun_getFloat32(JSContext *cx, unsigned argc, Value *vp)
1.1776 +{
1.1777 + CallArgs args = CallArgsFromVp(argc, vp);
1.1778 + return CallNonGenericMethod<is, getFloat32Impl>(cx, args);
1.1779 +}
1.1780 +
1.1781 +bool
1.1782 +DataViewObject::getFloat64Impl(JSContext *cx, CallArgs args)
1.1783 +{
1.1784 + JS_ASSERT(is(args.thisv()));
1.1785 +
1.1786 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1787 +
1.1788 + double val;
1.1789 + if (!read(cx, thisView, args, &val, "getFloat64"))
1.1790 + return false;
1.1791 +
1.1792 + args.rval().setDouble(CanonicalizeNaN(val));
1.1793 + return true;
1.1794 +}
1.1795 +
1.1796 +bool
1.1797 +DataViewObject::fun_getFloat64(JSContext *cx, unsigned argc, Value *vp)
1.1798 +{
1.1799 + CallArgs args = CallArgsFromVp(argc, vp);
1.1800 + return CallNonGenericMethod<is, getFloat64Impl>(cx, args);
1.1801 +}
1.1802 +
1.1803 +bool
1.1804 +DataViewObject::setInt8Impl(JSContext *cx, CallArgs args)
1.1805 +{
1.1806 + JS_ASSERT(is(args.thisv()));
1.1807 +
1.1808 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1809 +
1.1810 + if (!write<int8_t>(cx, thisView, args, "setInt8"))
1.1811 + return false;
1.1812 + args.rval().setUndefined();
1.1813 + return true;
1.1814 +}
1.1815 +
1.1816 +bool
1.1817 +DataViewObject::fun_setInt8(JSContext *cx, unsigned argc, Value *vp)
1.1818 +{
1.1819 + CallArgs args = CallArgsFromVp(argc, vp);
1.1820 + return CallNonGenericMethod<is, setInt8Impl>(cx, args);
1.1821 +}
1.1822 +
1.1823 +bool
1.1824 +DataViewObject::setUint8Impl(JSContext *cx, CallArgs args)
1.1825 +{
1.1826 + JS_ASSERT(is(args.thisv()));
1.1827 +
1.1828 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1829 +
1.1830 + if (!write<uint8_t>(cx, thisView, args, "setUint8"))
1.1831 + return false;
1.1832 + args.rval().setUndefined();
1.1833 + return true;
1.1834 +}
1.1835 +
1.1836 +bool
1.1837 +DataViewObject::fun_setUint8(JSContext *cx, unsigned argc, Value *vp)
1.1838 +{
1.1839 + CallArgs args = CallArgsFromVp(argc, vp);
1.1840 + return CallNonGenericMethod<is, setUint8Impl>(cx, args);
1.1841 +}
1.1842 +
1.1843 +bool
1.1844 +DataViewObject::setInt16Impl(JSContext *cx, CallArgs args)
1.1845 +{
1.1846 + JS_ASSERT(is(args.thisv()));
1.1847 +
1.1848 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1849 +
1.1850 + if (!write<int16_t>(cx, thisView, args, "setInt16"))
1.1851 + return false;
1.1852 + args.rval().setUndefined();
1.1853 + return true;
1.1854 +}
1.1855 +
1.1856 +bool
1.1857 +DataViewObject::fun_setInt16(JSContext *cx, unsigned argc, Value *vp)
1.1858 +{
1.1859 + CallArgs args = CallArgsFromVp(argc, vp);
1.1860 + return CallNonGenericMethod<is, setInt16Impl>(cx, args);
1.1861 +}
1.1862 +
1.1863 +bool
1.1864 +DataViewObject::setUint16Impl(JSContext *cx, CallArgs args)
1.1865 +{
1.1866 + JS_ASSERT(is(args.thisv()));
1.1867 +
1.1868 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1869 +
1.1870 + if (!write<uint16_t>(cx, thisView, args, "setUint16"))
1.1871 + return false;
1.1872 + args.rval().setUndefined();
1.1873 + return true;
1.1874 +}
1.1875 +
1.1876 +bool
1.1877 +DataViewObject::fun_setUint16(JSContext *cx, unsigned argc, Value *vp)
1.1878 +{
1.1879 + CallArgs args = CallArgsFromVp(argc, vp);
1.1880 + return CallNonGenericMethod<is, setUint16Impl>(cx, args);
1.1881 +}
1.1882 +
1.1883 +bool
1.1884 +DataViewObject::setInt32Impl(JSContext *cx, CallArgs args)
1.1885 +{
1.1886 + JS_ASSERT(is(args.thisv()));
1.1887 +
1.1888 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1889 +
1.1890 + if (!write<int32_t>(cx, thisView, args, "setInt32"))
1.1891 + return false;
1.1892 + args.rval().setUndefined();
1.1893 + return true;
1.1894 +}
1.1895 +
1.1896 +bool
1.1897 +DataViewObject::fun_setInt32(JSContext *cx, unsigned argc, Value *vp)
1.1898 +{
1.1899 + CallArgs args = CallArgsFromVp(argc, vp);
1.1900 + return CallNonGenericMethod<is, setInt32Impl>(cx, args);
1.1901 +}
1.1902 +
1.1903 +bool
1.1904 +DataViewObject::setUint32Impl(JSContext *cx, CallArgs args)
1.1905 +{
1.1906 + JS_ASSERT(is(args.thisv()));
1.1907 +
1.1908 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1909 +
1.1910 + if (!write<uint32_t>(cx, thisView, args, "setUint32"))
1.1911 + return false;
1.1912 + args.rval().setUndefined();
1.1913 + return true;
1.1914 +}
1.1915 +
1.1916 +bool
1.1917 +DataViewObject::fun_setUint32(JSContext *cx, unsigned argc, Value *vp)
1.1918 +{
1.1919 + CallArgs args = CallArgsFromVp(argc, vp);
1.1920 + return CallNonGenericMethod<is, setUint32Impl>(cx, args);
1.1921 +}
1.1922 +
1.1923 +bool
1.1924 +DataViewObject::setFloat32Impl(JSContext *cx, CallArgs args)
1.1925 +{
1.1926 + JS_ASSERT(is(args.thisv()));
1.1927 +
1.1928 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1929 +
1.1930 + if (!write<float>(cx, thisView, args, "setFloat32"))
1.1931 + return false;
1.1932 + args.rval().setUndefined();
1.1933 + return true;
1.1934 +}
1.1935 +
1.1936 +bool
1.1937 +DataViewObject::fun_setFloat32(JSContext *cx, unsigned argc, Value *vp)
1.1938 +{
1.1939 + CallArgs args = CallArgsFromVp(argc, vp);
1.1940 + return CallNonGenericMethod<is, setFloat32Impl>(cx, args);
1.1941 +}
1.1942 +
1.1943 +bool
1.1944 +DataViewObject::setFloat64Impl(JSContext *cx, CallArgs args)
1.1945 +{
1.1946 + JS_ASSERT(is(args.thisv()));
1.1947 +
1.1948 + Rooted<DataViewObject*> thisView(cx, &args.thisv().toObject().as<DataViewObject>());
1.1949 +
1.1950 + if (!write<double>(cx, thisView, args, "setFloat64"))
1.1951 + return false;
1.1952 + args.rval().setUndefined();
1.1953 + return true;
1.1954 +}
1.1955 +
1.1956 +bool
1.1957 +DataViewObject::fun_setFloat64(JSContext *cx, unsigned argc, Value *vp)
1.1958 +{
1.1959 + CallArgs args = CallArgsFromVp(argc, vp);
1.1960 + return CallNonGenericMethod<is, setFloat64Impl>(cx, args);
1.1961 +}
1.1962 +
1.1963 +Value
1.1964 +TypedArrayObject::getElement(uint32_t index)
1.1965 +{
1.1966 + switch (type()) {
1.1967 + case ScalarTypeDescr::TYPE_INT8:
1.1968 + return TypedArrayObjectTemplate<int8_t>::getIndexValue(this, index);
1.1969 + break;
1.1970 + case ScalarTypeDescr::TYPE_UINT8:
1.1971 + return TypedArrayObjectTemplate<uint8_t>::getIndexValue(this, index);
1.1972 + break;
1.1973 + case ScalarTypeDescr::TYPE_UINT8_CLAMPED:
1.1974 + return TypedArrayObjectTemplate<uint8_clamped>::getIndexValue(this, index);
1.1975 + break;
1.1976 + case ScalarTypeDescr::TYPE_INT16:
1.1977 + return TypedArrayObjectTemplate<int16_t>::getIndexValue(this, index);
1.1978 + break;
1.1979 + case ScalarTypeDescr::TYPE_UINT16:
1.1980 + return TypedArrayObjectTemplate<uint16_t>::getIndexValue(this, index);
1.1981 + break;
1.1982 + case ScalarTypeDescr::TYPE_INT32:
1.1983 + return TypedArrayObjectTemplate<int32_t>::getIndexValue(this, index);
1.1984 + break;
1.1985 + case ScalarTypeDescr::TYPE_UINT32:
1.1986 + return TypedArrayObjectTemplate<uint32_t>::getIndexValue(this, index);
1.1987 + break;
1.1988 + case ScalarTypeDescr::TYPE_FLOAT32:
1.1989 + return TypedArrayObjectTemplate<float>::getIndexValue(this, index);
1.1990 + break;
1.1991 + case ScalarTypeDescr::TYPE_FLOAT64:
1.1992 + return TypedArrayObjectTemplate<double>::getIndexValue(this, index);
1.1993 + break;
1.1994 + default:
1.1995 + MOZ_ASSUME_UNREACHABLE("Unknown TypedArray type");
1.1996 + break;
1.1997 + }
1.1998 +}
1.1999 +
1.2000 +void
1.2001 +TypedArrayObject::setElement(TypedArrayObject &obj, uint32_t index, double d)
1.2002 +{
1.2003 + MOZ_ASSERT(index < obj.length());
1.2004 +
1.2005 + switch (obj.type()) {
1.2006 + case ScalarTypeDescr::TYPE_INT8:
1.2007 + TypedArrayObjectTemplate<int8_t>::setIndexValue(obj, index, d);
1.2008 + break;
1.2009 + case ScalarTypeDescr::TYPE_UINT8:
1.2010 + TypedArrayObjectTemplate<uint8_t>::setIndexValue(obj, index, d);
1.2011 + break;
1.2012 + case ScalarTypeDescr::TYPE_UINT8_CLAMPED:
1.2013 + TypedArrayObjectTemplate<uint8_clamped>::setIndexValue(obj, index, d);
1.2014 + break;
1.2015 + case ScalarTypeDescr::TYPE_INT16:
1.2016 + TypedArrayObjectTemplate<int16_t>::setIndexValue(obj, index, d);
1.2017 + break;
1.2018 + case ScalarTypeDescr::TYPE_UINT16:
1.2019 + TypedArrayObjectTemplate<uint16_t>::setIndexValue(obj, index, d);
1.2020 + break;
1.2021 + case ScalarTypeDescr::TYPE_INT32:
1.2022 + TypedArrayObjectTemplate<int32_t>::setIndexValue(obj, index, d);
1.2023 + break;
1.2024 + case ScalarTypeDescr::TYPE_UINT32:
1.2025 + TypedArrayObjectTemplate<uint32_t>::setIndexValue(obj, index, d);
1.2026 + break;
1.2027 + case ScalarTypeDescr::TYPE_FLOAT32:
1.2028 + TypedArrayObjectTemplate<float>::setIndexValue(obj, index, d);
1.2029 + break;
1.2030 + case ScalarTypeDescr::TYPE_FLOAT64:
1.2031 + TypedArrayObjectTemplate<double>::setIndexValue(obj, index, d);
1.2032 + break;
1.2033 + default:
1.2034 + MOZ_ASSUME_UNREACHABLE("Unknown TypedArray type");
1.2035 + break;
1.2036 + }
1.2037 +}
1.2038 +
1.2039 +/***
1.2040 + *** JS impl
1.2041 + ***/
1.2042 +
1.2043 +/*
1.2044 + * TypedArrayObject boilerplate
1.2045 + */
1.2046 +
1.2047 +#ifndef RELEASE_BUILD
1.2048 +# define IMPL_TYPED_ARRAY_STATICS(_typedArray) \
1.2049 +const JSFunctionSpec _typedArray##Object::jsfuncs[] = { \
1.2050 + JS_SELF_HOSTED_FN("@@iterator", "ArrayValues", 0, 0), \
1.2051 + JS_FN("subarray", _typedArray##Object::fun_subarray, 2, JSFUN_GENERIC_NATIVE), \
1.2052 + JS_FN("set", _typedArray##Object::fun_set, 2, JSFUN_GENERIC_NATIVE), \
1.2053 + JS_FN("move", _typedArray##Object::fun_move, 3, JSFUN_GENERIC_NATIVE), \
1.2054 + JS_FS_END \
1.2055 +}
1.2056 +#else
1.2057 +# define IMPL_TYPED_ARRAY_STATICS(_typedArray) \
1.2058 +const JSFunctionSpec _typedArray##Object::jsfuncs[] = { \
1.2059 + JS_SELF_HOSTED_FN("@@iterator", "ArrayValues", 0, 0), \
1.2060 + JS_FN("subarray", _typedArray##Object::fun_subarray, 2, JSFUN_GENERIC_NATIVE), \
1.2061 + JS_FN("set", _typedArray##Object::fun_set, 2, JSFUN_GENERIC_NATIVE), \
1.2062 + JS_FS_END \
1.2063 +}
1.2064 +#endif
1.2065 +
1.2066 +#define IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Name,NativeType) \
1.2067 + JS_FRIEND_API(JSObject *) JS_New ## Name ## Array(JSContext *cx, uint32_t nelements) \
1.2068 + { \
1.2069 + return TypedArrayObjectTemplate<NativeType>::fromLength(cx, nelements); \
1.2070 + } \
1.2071 + JS_FRIEND_API(JSObject *) JS_New ## Name ## ArrayFromArray(JSContext *cx, HandleObject other) \
1.2072 + { \
1.2073 + return TypedArrayObjectTemplate<NativeType>::fromArray(cx, other); \
1.2074 + } \
1.2075 + JS_FRIEND_API(JSObject *) JS_New ## Name ## ArrayWithBuffer(JSContext *cx, \
1.2076 + HandleObject arrayBuffer, uint32_t byteOffset, int32_t length) \
1.2077 + { \
1.2078 + return TypedArrayObjectTemplate<NativeType>::fromBuffer(cx, arrayBuffer, byteOffset, \
1.2079 + length, js::NullPtr()); \
1.2080 + } \
1.2081 + JS_FRIEND_API(bool) JS_Is ## Name ## Array(JSObject *obj) \
1.2082 + { \
1.2083 + if (!(obj = CheckedUnwrap(obj))) \
1.2084 + return false; \
1.2085 + const Class *clasp = obj->getClass(); \
1.2086 + return clasp == &TypedArrayObject::classes[TypedArrayObjectTemplate<NativeType>::ArrayTypeID()]; \
1.2087 + } \
1.2088 + JS_FRIEND_API(JSObject *) js::Unwrap ## Name ## Array(JSObject *obj) \
1.2089 + { \
1.2090 + obj = CheckedUnwrap(obj); \
1.2091 + if (!obj) \
1.2092 + return nullptr; \
1.2093 + const Class *clasp = obj->getClass(); \
1.2094 + if (clasp == &TypedArrayObject::classes[TypedArrayObjectTemplate<NativeType>::ArrayTypeID()]) \
1.2095 + return obj; \
1.2096 + return nullptr; \
1.2097 + } \
1.2098 + const js::Class* const js::detail::Name ## ArrayClassPtr = \
1.2099 + &js::TypedArrayObject::classes[TypedArrayObjectTemplate<NativeType>::ArrayTypeID()];
1.2100 +
1.2101 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Int8, int8_t)
1.2102 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Uint8, uint8_t)
1.2103 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Uint8Clamped, uint8_clamped)
1.2104 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Int16, int16_t)
1.2105 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Uint16, uint16_t)
1.2106 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Int32, int32_t)
1.2107 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Uint32, uint32_t)
1.2108 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Float32, float)
1.2109 +IMPL_TYPED_ARRAY_JSAPI_CONSTRUCTORS(Float64, double)
1.2110 +
1.2111 +#define IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Name, ExternalType, InternalType) \
1.2112 + JS_FRIEND_API(JSObject *) JS_GetObjectAs ## Name ## Array(JSObject *obj, \
1.2113 + uint32_t *length, \
1.2114 + ExternalType **data) \
1.2115 + { \
1.2116 + if (!(obj = CheckedUnwrap(obj))) \
1.2117 + return nullptr; \
1.2118 + \
1.2119 + const Class *clasp = obj->getClass(); \
1.2120 + if (clasp != &TypedArrayObject::classes[TypedArrayObjectTemplate<InternalType>::ArrayTypeID()]) \
1.2121 + return nullptr; \
1.2122 + \
1.2123 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>(); \
1.2124 + *length = tarr->length(); \
1.2125 + *data = static_cast<ExternalType *>(tarr->viewData()); \
1.2126 + \
1.2127 + return obj; \
1.2128 + }
1.2129 +
1.2130 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int8, int8_t, int8_t)
1.2131 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint8, uint8_t, uint8_t)
1.2132 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint8Clamped, uint8_t, uint8_clamped)
1.2133 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int16, int16_t, int16_t)
1.2134 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint16, uint16_t, uint16_t)
1.2135 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Int32, int32_t, int32_t)
1.2136 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Uint32, uint32_t, uint32_t)
1.2137 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Float32, float, float)
1.2138 +IMPL_TYPED_ARRAY_COMBINED_UNWRAPPERS(Float64, double, double)
1.2139 +
1.2140 +#define IMPL_TYPED_ARRAY_PROTO_CLASS(_typedArray) \
1.2141 +{ \
1.2142 + #_typedArray "Prototype", \
1.2143 + JSCLASS_HAS_RESERVED_SLOTS(TypedArrayObject::RESERVED_SLOTS) | \
1.2144 + JSCLASS_HAS_PRIVATE | \
1.2145 + JSCLASS_HAS_CACHED_PROTO(JSProto_##_typedArray), \
1.2146 + JS_PropertyStub, /* addProperty */ \
1.2147 + JS_DeletePropertyStub, /* delProperty */ \
1.2148 + JS_PropertyStub, /* getProperty */ \
1.2149 + JS_StrictPropertyStub, /* setProperty */ \
1.2150 + JS_EnumerateStub, \
1.2151 + JS_ResolveStub, \
1.2152 + JS_ConvertStub \
1.2153 +}
1.2154 +
1.2155 +#define IMPL_TYPED_ARRAY_FAST_CLASS(_typedArray) \
1.2156 +{ \
1.2157 + #_typedArray, \
1.2158 + JSCLASS_HAS_RESERVED_SLOTS(TypedArrayObject::RESERVED_SLOTS) | \
1.2159 + JSCLASS_HAS_PRIVATE | JSCLASS_IMPLEMENTS_BARRIERS | \
1.2160 + JSCLASS_HAS_CACHED_PROTO(JSProto_##_typedArray), \
1.2161 + JS_PropertyStub, /* addProperty */ \
1.2162 + JS_DeletePropertyStub, /* delProperty */ \
1.2163 + JS_PropertyStub, /* getProperty */ \
1.2164 + JS_StrictPropertyStub, /* setProperty */ \
1.2165 + JS_EnumerateStub, \
1.2166 + JS_ResolveStub, \
1.2167 + JS_ConvertStub, \
1.2168 + nullptr, /* finalize */ \
1.2169 + nullptr, /* call */ \
1.2170 + nullptr, /* hasInstance */ \
1.2171 + nullptr, /* construct */ \
1.2172 + ArrayBufferViewObject::trace, /* trace */ \
1.2173 +}
1.2174 +
1.2175 +template<class ArrayType>
1.2176 +static inline bool
1.2177 +InitTypedArrayClass(JSContext *cx)
1.2178 +{
1.2179 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.2180 + if (global->isStandardClassResolved(ArrayType::key))
1.2181 + return true;
1.2182 +
1.2183 + RootedObject proto(cx, global->createBlankPrototype(cx, ArrayType::protoClass()));
1.2184 + if (!proto)
1.2185 + return false;
1.2186 +
1.2187 + RootedFunction ctor(cx);
1.2188 + ctor = global->createConstructor(cx, ArrayType::class_constructor,
1.2189 + ClassName(ArrayType::key, cx), 3);
1.2190 + if (!ctor)
1.2191 + return false;
1.2192 +
1.2193 + if (!LinkConstructorAndPrototype(cx, ctor, proto))
1.2194 + return false;
1.2195 +
1.2196 + RootedValue bytesValue(cx, Int32Value(ArrayType::BYTES_PER_ELEMENT));
1.2197 +
1.2198 + if (!JSObject::defineProperty(cx, ctor,
1.2199 + cx->names().BYTES_PER_ELEMENT, bytesValue,
1.2200 + JS_PropertyStub, JS_StrictPropertyStub,
1.2201 + JSPROP_PERMANENT | JSPROP_READONLY) ||
1.2202 + !JSObject::defineProperty(cx, proto,
1.2203 + cx->names().BYTES_PER_ELEMENT, bytesValue,
1.2204 + JS_PropertyStub, JS_StrictPropertyStub,
1.2205 + JSPROP_PERMANENT | JSPROP_READONLY))
1.2206 + {
1.2207 + return false;
1.2208 + }
1.2209 +
1.2210 + if (!ArrayType::defineGetters(cx, proto))
1.2211 + return false;
1.2212 +
1.2213 + if (!JS_DefineFunctions(cx, proto, ArrayType::jsfuncs))
1.2214 + return false;
1.2215 +
1.2216 + RootedFunction fun(cx);
1.2217 + fun =
1.2218 + NewFunction(cx, NullPtr(),
1.2219 + ArrayBufferObject::createTypedArrayFromBuffer<typename ArrayType::ThisType>,
1.2220 + 0, JSFunction::NATIVE_FUN, global, NullPtr());
1.2221 + if (!fun)
1.2222 + return false;
1.2223 +
1.2224 + if (!GlobalObject::initBuiltinConstructor(cx, global, ArrayType::key, ctor, proto))
1.2225 + return false;
1.2226 +
1.2227 + global->setCreateArrayFromBuffer<typename ArrayType::ThisType>(fun);
1.2228 +
1.2229 + return true;
1.2230 +}
1.2231 +
1.2232 +IMPL_TYPED_ARRAY_STATICS(Int8Array);
1.2233 +IMPL_TYPED_ARRAY_STATICS(Uint8Array);
1.2234 +IMPL_TYPED_ARRAY_STATICS(Int16Array);
1.2235 +IMPL_TYPED_ARRAY_STATICS(Uint16Array);
1.2236 +IMPL_TYPED_ARRAY_STATICS(Int32Array);
1.2237 +IMPL_TYPED_ARRAY_STATICS(Uint32Array);
1.2238 +IMPL_TYPED_ARRAY_STATICS(Float32Array);
1.2239 +IMPL_TYPED_ARRAY_STATICS(Float64Array);
1.2240 +IMPL_TYPED_ARRAY_STATICS(Uint8ClampedArray);
1.2241 +
1.2242 +const Class TypedArrayObject::classes[ScalarTypeDescr::TYPE_MAX] = {
1.2243 + IMPL_TYPED_ARRAY_FAST_CLASS(Int8Array),
1.2244 + IMPL_TYPED_ARRAY_FAST_CLASS(Uint8Array),
1.2245 + IMPL_TYPED_ARRAY_FAST_CLASS(Int16Array),
1.2246 + IMPL_TYPED_ARRAY_FAST_CLASS(Uint16Array),
1.2247 + IMPL_TYPED_ARRAY_FAST_CLASS(Int32Array),
1.2248 + IMPL_TYPED_ARRAY_FAST_CLASS(Uint32Array),
1.2249 + IMPL_TYPED_ARRAY_FAST_CLASS(Float32Array),
1.2250 + IMPL_TYPED_ARRAY_FAST_CLASS(Float64Array),
1.2251 + IMPL_TYPED_ARRAY_FAST_CLASS(Uint8ClampedArray)
1.2252 +};
1.2253 +
1.2254 +const Class TypedArrayObject::protoClasses[ScalarTypeDescr::TYPE_MAX] = {
1.2255 + IMPL_TYPED_ARRAY_PROTO_CLASS(Int8Array),
1.2256 + IMPL_TYPED_ARRAY_PROTO_CLASS(Uint8Array),
1.2257 + IMPL_TYPED_ARRAY_PROTO_CLASS(Int16Array),
1.2258 + IMPL_TYPED_ARRAY_PROTO_CLASS(Uint16Array),
1.2259 + IMPL_TYPED_ARRAY_PROTO_CLASS(Int32Array),
1.2260 + IMPL_TYPED_ARRAY_PROTO_CLASS(Uint32Array),
1.2261 + IMPL_TYPED_ARRAY_PROTO_CLASS(Float32Array),
1.2262 + IMPL_TYPED_ARRAY_PROTO_CLASS(Float64Array),
1.2263 + IMPL_TYPED_ARRAY_PROTO_CLASS(Uint8ClampedArray)
1.2264 +};
1.2265 +
1.2266 +#define CHECK(t, a) { if (t == a::IsThisClass) return true; }
1.2267 +JS_FRIEND_API(bool)
1.2268 +js::IsTypedArrayThisCheck(JS::IsAcceptableThis test)
1.2269 +{
1.2270 + CHECK(test, Int8ArrayObject);
1.2271 + CHECK(test, Uint8ArrayObject);
1.2272 + CHECK(test, Int16ArrayObject);
1.2273 + CHECK(test, Uint16ArrayObject);
1.2274 + CHECK(test, Int32ArrayObject);
1.2275 + CHECK(test, Uint32ArrayObject);
1.2276 + CHECK(test, Float32ArrayObject);
1.2277 + CHECK(test, Float64ArrayObject);
1.2278 + CHECK(test, Uint8ClampedArrayObject);
1.2279 + return false;
1.2280 +}
1.2281 +#undef CHECK
1.2282 +
1.2283 +static JSObject *
1.2284 +InitArrayBufferClass(JSContext *cx)
1.2285 +{
1.2286 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.2287 + if (global->isStandardClassResolved(JSProto_ArrayBuffer))
1.2288 + return &global->getPrototype(JSProto_ArrayBuffer).toObject();
1.2289 +
1.2290 + RootedObject arrayBufferProto(cx, global->createBlankPrototype(cx, &ArrayBufferObject::protoClass));
1.2291 + if (!arrayBufferProto)
1.2292 + return nullptr;
1.2293 +
1.2294 + RootedFunction ctor(cx, global->createConstructor(cx, ArrayBufferObject::class_constructor,
1.2295 + cx->names().ArrayBuffer, 1));
1.2296 + if (!ctor)
1.2297 + return nullptr;
1.2298 +
1.2299 + if (!LinkConstructorAndPrototype(cx, ctor, arrayBufferProto))
1.2300 + return nullptr;
1.2301 +
1.2302 + RootedId byteLengthId(cx, NameToId(cx->names().byteLength));
1.2303 + unsigned attrs = JSPROP_SHARED | JSPROP_GETTER | JSPROP_PERMANENT;
1.2304 + JSObject *getter = NewFunction(cx, NullPtr(), ArrayBufferObject::byteLengthGetter, 0,
1.2305 + JSFunction::NATIVE_FUN, global, NullPtr());
1.2306 + if (!getter)
1.2307 + return nullptr;
1.2308 +
1.2309 + if (!DefineNativeProperty(cx, arrayBufferProto, byteLengthId, UndefinedHandleValue,
1.2310 + JS_DATA_TO_FUNC_PTR(PropertyOp, getter), nullptr, attrs))
1.2311 + return nullptr;
1.2312 +
1.2313 + if (!JS_DefineFunctions(cx, ctor, ArrayBufferObject::jsstaticfuncs))
1.2314 + return nullptr;
1.2315 +
1.2316 + if (!JS_DefineFunctions(cx, arrayBufferProto, ArrayBufferObject::jsfuncs))
1.2317 + return nullptr;
1.2318 +
1.2319 + if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_ArrayBuffer,
1.2320 + ctor, arrayBufferProto))
1.2321 + {
1.2322 + return nullptr;
1.2323 + }
1.2324 +
1.2325 + return arrayBufferProto;
1.2326 +}
1.2327 +
1.2328 +const Class DataViewObject::protoClass = {
1.2329 + "DataViewPrototype",
1.2330 + JSCLASS_HAS_PRIVATE |
1.2331 + JSCLASS_HAS_RESERVED_SLOTS(DataViewObject::RESERVED_SLOTS) |
1.2332 + JSCLASS_HAS_CACHED_PROTO(JSProto_DataView),
1.2333 + JS_PropertyStub, /* addProperty */
1.2334 + JS_DeletePropertyStub, /* delProperty */
1.2335 + JS_PropertyStub, /* getProperty */
1.2336 + JS_StrictPropertyStub, /* setProperty */
1.2337 + JS_EnumerateStub,
1.2338 + JS_ResolveStub,
1.2339 + JS_ConvertStub
1.2340 +};
1.2341 +
1.2342 +const Class DataViewObject::class_ = {
1.2343 + "DataView",
1.2344 + JSCLASS_HAS_PRIVATE |
1.2345 + JSCLASS_IMPLEMENTS_BARRIERS |
1.2346 + JSCLASS_HAS_RESERVED_SLOTS(DataViewObject::RESERVED_SLOTS) |
1.2347 + JSCLASS_HAS_CACHED_PROTO(JSProto_DataView),
1.2348 + JS_PropertyStub, /* addProperty */
1.2349 + JS_DeletePropertyStub, /* delProperty */
1.2350 + JS_PropertyStub, /* getProperty */
1.2351 + JS_StrictPropertyStub, /* setProperty */
1.2352 + JS_EnumerateStub,
1.2353 + JS_ResolveStub,
1.2354 + JS_ConvertStub,
1.2355 + nullptr, /* finalize */
1.2356 + nullptr, /* call */
1.2357 + nullptr, /* hasInstance */
1.2358 + nullptr, /* construct */
1.2359 + ArrayBufferViewObject::trace, /* trace */
1.2360 +};
1.2361 +
1.2362 +const JSFunctionSpec DataViewObject::jsfuncs[] = {
1.2363 + JS_FN("getInt8", DataViewObject::fun_getInt8, 1,0),
1.2364 + JS_FN("getUint8", DataViewObject::fun_getUint8, 1,0),
1.2365 + JS_FN("getInt16", DataViewObject::fun_getInt16, 2,0),
1.2366 + JS_FN("getUint16", DataViewObject::fun_getUint16, 2,0),
1.2367 + JS_FN("getInt32", DataViewObject::fun_getInt32, 2,0),
1.2368 + JS_FN("getUint32", DataViewObject::fun_getUint32, 2,0),
1.2369 + JS_FN("getFloat32", DataViewObject::fun_getFloat32, 2,0),
1.2370 + JS_FN("getFloat64", DataViewObject::fun_getFloat64, 2,0),
1.2371 + JS_FN("setInt8", DataViewObject::fun_setInt8, 2,0),
1.2372 + JS_FN("setUint8", DataViewObject::fun_setUint8, 2,0),
1.2373 + JS_FN("setInt16", DataViewObject::fun_setInt16, 3,0),
1.2374 + JS_FN("setUint16", DataViewObject::fun_setUint16, 3,0),
1.2375 + JS_FN("setInt32", DataViewObject::fun_setInt32, 3,0),
1.2376 + JS_FN("setUint32", DataViewObject::fun_setUint32, 3,0),
1.2377 + JS_FN("setFloat32", DataViewObject::fun_setFloat32, 3,0),
1.2378 + JS_FN("setFloat64", DataViewObject::fun_setFloat64, 3,0),
1.2379 + JS_FS_END
1.2380 +};
1.2381 +
1.2382 +template<Value ValueGetter(DataViewObject *view)>
1.2383 +bool
1.2384 +DataViewObject::getterImpl(JSContext *cx, CallArgs args)
1.2385 +{
1.2386 + args.rval().set(ValueGetter(&args.thisv().toObject().as<DataViewObject>()));
1.2387 + return true;
1.2388 +}
1.2389 +
1.2390 +template<Value ValueGetter(DataViewObject *view)>
1.2391 +bool
1.2392 +DataViewObject::getter(JSContext *cx, unsigned argc, Value *vp)
1.2393 +{
1.2394 + CallArgs args = CallArgsFromVp(argc, vp);
1.2395 + return CallNonGenericMethod<is, getterImpl<ValueGetter> >(cx, args);
1.2396 +}
1.2397 +
1.2398 +template<Value ValueGetter(DataViewObject *view)>
1.2399 +bool
1.2400 +DataViewObject::defineGetter(JSContext *cx, PropertyName *name, HandleObject proto)
1.2401 +{
1.2402 + RootedId id(cx, NameToId(name));
1.2403 + unsigned attrs = JSPROP_SHARED | JSPROP_GETTER | JSPROP_PERMANENT;
1.2404 +
1.2405 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.2406 + JSObject *getter = NewFunction(cx, NullPtr(), DataViewObject::getter<ValueGetter>, 0,
1.2407 + JSFunction::NATIVE_FUN, global, NullPtr());
1.2408 + if (!getter)
1.2409 + return false;
1.2410 +
1.2411 + return DefineNativeProperty(cx, proto, id, UndefinedHandleValue,
1.2412 + JS_DATA_TO_FUNC_PTR(PropertyOp, getter), nullptr, attrs);
1.2413 +}
1.2414 +
1.2415 +/* static */ bool
1.2416 +DataViewObject::initClass(JSContext *cx)
1.2417 +{
1.2418 + Rooted<GlobalObject*> global(cx, cx->compartment()->maybeGlobal());
1.2419 + if (global->isStandardClassResolved(JSProto_DataView))
1.2420 + return true;
1.2421 +
1.2422 + RootedObject proto(cx, global->createBlankPrototype(cx, &DataViewObject::protoClass));
1.2423 + if (!proto)
1.2424 + return false;
1.2425 +
1.2426 + RootedFunction ctor(cx, global->createConstructor(cx, DataViewObject::class_constructor,
1.2427 + cx->names().DataView, 3));
1.2428 + if (!ctor)
1.2429 + return false;
1.2430 +
1.2431 + if (!LinkConstructorAndPrototype(cx, ctor, proto))
1.2432 + return false;
1.2433 +
1.2434 + if (!defineGetter<bufferValue>(cx, cx->names().buffer, proto))
1.2435 + return false;
1.2436 +
1.2437 + if (!defineGetter<byteLengthValue>(cx, cx->names().byteLength, proto))
1.2438 + return false;
1.2439 +
1.2440 + if (!defineGetter<byteOffsetValue>(cx, cx->names().byteOffset, proto))
1.2441 + return false;
1.2442 +
1.2443 + if (!JS_DefineFunctions(cx, proto, DataViewObject::jsfuncs))
1.2444 + return false;
1.2445 +
1.2446 + /*
1.2447 + * Create a helper function to implement the craziness of
1.2448 + * |new DataView(new otherWindow.ArrayBuffer())|, and install it in the
1.2449 + * global for use by the DataViewObject constructor.
1.2450 + */
1.2451 + RootedFunction fun(cx, NewFunction(cx, NullPtr(), ArrayBufferObject::createDataViewForThis,
1.2452 + 0, JSFunction::NATIVE_FUN, global, NullPtr()));
1.2453 + if (!fun)
1.2454 + return false;
1.2455 +
1.2456 + if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_DataView, ctor, proto))
1.2457 + return false;
1.2458 +
1.2459 + global->setCreateDataViewForThis(fun);
1.2460 +
1.2461 + return true;
1.2462 +}
1.2463 +
1.2464 +void
1.2465 +DataViewObject::neuter(void *newData)
1.2466 +{
1.2467 + setSlot(BYTELENGTH_SLOT, Int32Value(0));
1.2468 + setSlot(BYTEOFFSET_SLOT, Int32Value(0));
1.2469 + setPrivate(newData);
1.2470 +}
1.2471 +
1.2472 +JSObject *
1.2473 +js_InitTypedArrayClasses(JSContext *cx, HandleObject obj)
1.2474 +{
1.2475 + if (!InitTypedArrayClass<Int8ArrayObject>(cx) ||
1.2476 + !InitTypedArrayClass<Uint8ArrayObject>(cx) ||
1.2477 + !InitTypedArrayClass<Int16ArrayObject>(cx) ||
1.2478 + !InitTypedArrayClass<Uint16ArrayObject>(cx) ||
1.2479 + !InitTypedArrayClass<Int32ArrayObject>(cx) ||
1.2480 + !InitTypedArrayClass<Uint32ArrayObject>(cx) ||
1.2481 + !InitTypedArrayClass<Float32ArrayObject>(cx) ||
1.2482 + !InitTypedArrayClass<Float64ArrayObject>(cx) ||
1.2483 + !InitTypedArrayClass<Uint8ClampedArrayObject>(cx) ||
1.2484 + !DataViewObject::initClass(cx))
1.2485 + {
1.2486 + return nullptr;
1.2487 + }
1.2488 +
1.2489 + return InitArrayBufferClass(cx);
1.2490 +}
1.2491 +
1.2492 +bool
1.2493 +js::IsTypedArrayConstructor(HandleValue v, uint32_t type)
1.2494 +{
1.2495 + switch (type) {
1.2496 + case ScalarTypeDescr::TYPE_INT8:
1.2497 + return IsNativeFunction(v, Int8ArrayObject::class_constructor);
1.2498 + case ScalarTypeDescr::TYPE_UINT8:
1.2499 + return IsNativeFunction(v, Uint8ArrayObject::class_constructor);
1.2500 + case ScalarTypeDescr::TYPE_INT16:
1.2501 + return IsNativeFunction(v, Int16ArrayObject::class_constructor);
1.2502 + case ScalarTypeDescr::TYPE_UINT16:
1.2503 + return IsNativeFunction(v, Uint16ArrayObject::class_constructor);
1.2504 + case ScalarTypeDescr::TYPE_INT32:
1.2505 + return IsNativeFunction(v, Int32ArrayObject::class_constructor);
1.2506 + case ScalarTypeDescr::TYPE_UINT32:
1.2507 + return IsNativeFunction(v, Uint32ArrayObject::class_constructor);
1.2508 + case ScalarTypeDescr::TYPE_FLOAT32:
1.2509 + return IsNativeFunction(v, Float32ArrayObject::class_constructor);
1.2510 + case ScalarTypeDescr::TYPE_FLOAT64:
1.2511 + return IsNativeFunction(v, Float64ArrayObject::class_constructor);
1.2512 + case ScalarTypeDescr::TYPE_UINT8_CLAMPED:
1.2513 + return IsNativeFunction(v, Uint8ClampedArrayObject::class_constructor);
1.2514 + }
1.2515 + MOZ_ASSUME_UNREACHABLE("unexpected typed array type");
1.2516 +}
1.2517 +
1.2518 +bool
1.2519 +js::IsTypedArrayBuffer(HandleValue v)
1.2520 +{
1.2521 + return v.isObject() &&
1.2522 + (v.toObject().is<ArrayBufferObject>() ||
1.2523 + v.toObject().is<SharedArrayBufferObject>());
1.2524 +}
1.2525 +
1.2526 +ArrayBufferObject &
1.2527 +js::AsTypedArrayBuffer(HandleValue v)
1.2528 +{
1.2529 + JS_ASSERT(IsTypedArrayBuffer(v));
1.2530 + if (v.toObject().is<ArrayBufferObject>())
1.2531 + return v.toObject().as<ArrayBufferObject>();
1.2532 + return v.toObject().as<SharedArrayBufferObject>();
1.2533 +}
1.2534 +
1.2535 +bool
1.2536 +js::StringIsTypedArrayIndex(JSLinearString *str, uint64_t *indexp)
1.2537 +{
1.2538 + const jschar *s = str->chars();
1.2539 + const jschar *end = s + str->length();
1.2540 +
1.2541 + if (s == end)
1.2542 + return false;
1.2543 +
1.2544 + bool negative = false;
1.2545 + if (*s == '-') {
1.2546 + negative = true;
1.2547 + if (++s == end)
1.2548 + return false;
1.2549 + }
1.2550 +
1.2551 + if (!JS7_ISDEC(*s))
1.2552 + return false;
1.2553 +
1.2554 + uint64_t index = 0;
1.2555 + uint32_t digit = JS7_UNDEC(*s++);
1.2556 +
1.2557 + /* Don't allow leading zeros. */
1.2558 + if (digit == 0 && s != end)
1.2559 + return false;
1.2560 +
1.2561 + index = digit;
1.2562 +
1.2563 + for (; s < end; s++) {
1.2564 + if (!JS7_ISDEC(*s))
1.2565 + return false;
1.2566 +
1.2567 + digit = JS7_UNDEC(*s);
1.2568 +
1.2569 + /* Watch for overflows. */
1.2570 + if ((UINT64_MAX - digit) / 10 < index)
1.2571 + index = UINT64_MAX;
1.2572 + else
1.2573 + index = 10 * index + digit;
1.2574 + }
1.2575 +
1.2576 + if (negative)
1.2577 + *indexp = UINT64_MAX;
1.2578 + else
1.2579 + *indexp = index;
1.2580 + return true;
1.2581 +}
1.2582 +
1.2583 +/* JS Friend API */
1.2584 +
1.2585 +JS_FRIEND_API(bool)
1.2586 +JS_IsTypedArrayObject(JSObject *obj)
1.2587 +{
1.2588 + obj = CheckedUnwrap(obj);
1.2589 + return obj ? obj->is<TypedArrayObject>() : false;
1.2590 +}
1.2591 +
1.2592 +JS_FRIEND_API(uint32_t)
1.2593 +JS_GetTypedArrayLength(JSObject *obj)
1.2594 +{
1.2595 + obj = CheckedUnwrap(obj);
1.2596 + if (!obj)
1.2597 + return 0;
1.2598 + return obj->as<TypedArrayObject>().length();
1.2599 +}
1.2600 +
1.2601 +JS_FRIEND_API(uint32_t)
1.2602 +JS_GetTypedArrayByteOffset(JSObject *obj)
1.2603 +{
1.2604 + obj = CheckedUnwrap(obj);
1.2605 + if (!obj)
1.2606 + return 0;
1.2607 + return obj->as<TypedArrayObject>().byteOffset();
1.2608 +}
1.2609 +
1.2610 +JS_FRIEND_API(uint32_t)
1.2611 +JS_GetTypedArrayByteLength(JSObject *obj)
1.2612 +{
1.2613 + obj = CheckedUnwrap(obj);
1.2614 + if (!obj)
1.2615 + return 0;
1.2616 + return obj->as<TypedArrayObject>().byteLength();
1.2617 +}
1.2618 +
1.2619 +JS_FRIEND_API(JSArrayBufferViewType)
1.2620 +JS_GetArrayBufferViewType(JSObject *obj)
1.2621 +{
1.2622 + obj = CheckedUnwrap(obj);
1.2623 + if (!obj)
1.2624 + return ArrayBufferView::TYPE_MAX;
1.2625 +
1.2626 + if (obj->is<TypedArrayObject>())
1.2627 + return static_cast<JSArrayBufferViewType>(obj->as<TypedArrayObject>().type());
1.2628 + else if (obj->is<DataViewObject>())
1.2629 + return ArrayBufferView::TYPE_DATAVIEW;
1.2630 + MOZ_ASSUME_UNREACHABLE("invalid ArrayBufferView type");
1.2631 +}
1.2632 +
1.2633 +JS_FRIEND_API(int8_t *)
1.2634 +JS_GetInt8ArrayData(JSObject *obj)
1.2635 +{
1.2636 + obj = CheckedUnwrap(obj);
1.2637 + if (!obj)
1.2638 + return nullptr;
1.2639 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2640 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_INT8);
1.2641 + return static_cast<int8_t *>(tarr->viewData());
1.2642 +}
1.2643 +
1.2644 +JS_FRIEND_API(uint8_t *)
1.2645 +JS_GetUint8ArrayData(JSObject *obj)
1.2646 +{
1.2647 + obj = CheckedUnwrap(obj);
1.2648 + if (!obj)
1.2649 + return nullptr;
1.2650 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2651 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_UINT8);
1.2652 + return static_cast<uint8_t *>(tarr->viewData());
1.2653 +}
1.2654 +
1.2655 +JS_FRIEND_API(uint8_t *)
1.2656 +JS_GetUint8ClampedArrayData(JSObject *obj)
1.2657 +{
1.2658 + obj = CheckedUnwrap(obj);
1.2659 + if (!obj)
1.2660 + return nullptr;
1.2661 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2662 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_UINT8_CLAMPED);
1.2663 + return static_cast<uint8_t *>(tarr->viewData());
1.2664 +}
1.2665 +
1.2666 +JS_FRIEND_API(int16_t *)
1.2667 +JS_GetInt16ArrayData(JSObject *obj)
1.2668 +{
1.2669 + obj = CheckedUnwrap(obj);
1.2670 + if (!obj)
1.2671 + return nullptr;
1.2672 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2673 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_INT16);
1.2674 + return static_cast<int16_t *>(tarr->viewData());
1.2675 +}
1.2676 +
1.2677 +JS_FRIEND_API(uint16_t *)
1.2678 +JS_GetUint16ArrayData(JSObject *obj)
1.2679 +{
1.2680 + obj = CheckedUnwrap(obj);
1.2681 + if (!obj)
1.2682 + return nullptr;
1.2683 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2684 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_UINT16);
1.2685 + return static_cast<uint16_t *>(tarr->viewData());
1.2686 +}
1.2687 +
1.2688 +JS_FRIEND_API(int32_t *)
1.2689 +JS_GetInt32ArrayData(JSObject *obj)
1.2690 +{
1.2691 + obj = CheckedUnwrap(obj);
1.2692 + if (!obj)
1.2693 + return nullptr;
1.2694 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2695 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_INT32);
1.2696 + return static_cast<int32_t *>(tarr->viewData());
1.2697 +}
1.2698 +
1.2699 +JS_FRIEND_API(uint32_t *)
1.2700 +JS_GetUint32ArrayData(JSObject *obj)
1.2701 +{
1.2702 + obj = CheckedUnwrap(obj);
1.2703 + if (!obj)
1.2704 + return nullptr;
1.2705 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2706 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_UINT32);
1.2707 + return static_cast<uint32_t *>(tarr->viewData());
1.2708 +}
1.2709 +
1.2710 +JS_FRIEND_API(float *)
1.2711 +JS_GetFloat32ArrayData(JSObject *obj)
1.2712 +{
1.2713 + obj = CheckedUnwrap(obj);
1.2714 + if (!obj)
1.2715 + return nullptr;
1.2716 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2717 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_FLOAT32);
1.2718 + return static_cast<float *>(tarr->viewData());
1.2719 +}
1.2720 +
1.2721 +JS_FRIEND_API(double *)
1.2722 +JS_GetFloat64ArrayData(JSObject *obj)
1.2723 +{
1.2724 + obj = CheckedUnwrap(obj);
1.2725 + if (!obj)
1.2726 + return nullptr;
1.2727 + TypedArrayObject *tarr = &obj->as<TypedArrayObject>();
1.2728 + JS_ASSERT(tarr->type() == ArrayBufferView::TYPE_FLOAT64);
1.2729 + return static_cast<double *>(tarr->viewData());
1.2730 +}
1.2731 +
1.2732 +JS_FRIEND_API(bool)
1.2733 +JS_IsDataViewObject(JSObject *obj)
1.2734 +{
1.2735 + obj = CheckedUnwrap(obj);
1.2736 + return obj ? obj->is<DataViewObject>() : false;
1.2737 +}
1.2738 +
1.2739 +JS_FRIEND_API(uint32_t)
1.2740 +JS_GetDataViewByteOffset(JSObject *obj)
1.2741 +{
1.2742 + obj = CheckedUnwrap(obj);
1.2743 + if (!obj)
1.2744 + return 0;
1.2745 + return obj->as<DataViewObject>().byteOffset();
1.2746 +}
1.2747 +
1.2748 +JS_FRIEND_API(void *)
1.2749 +JS_GetDataViewData(JSObject *obj)
1.2750 +{
1.2751 + obj = CheckedUnwrap(obj);
1.2752 + if (!obj)
1.2753 + return nullptr;
1.2754 + return obj->as<DataViewObject>().dataPointer();
1.2755 +}
1.2756 +
1.2757 +JS_FRIEND_API(uint32_t)
1.2758 +JS_GetDataViewByteLength(JSObject *obj)
1.2759 +{
1.2760 + obj = CheckedUnwrap(obj);
1.2761 + if (!obj)
1.2762 + return 0;
1.2763 + return obj->as<DataViewObject>().byteLength();
1.2764 +}
