| /* |
| * Copyright (C) 2009 Apple Inc. All rights reserved. |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef JSArrayBufferViewHelper_h |
| #define JSArrayBufferViewHelper_h |
| |
| #include "ArrayBufferView.h" |
| #include "ExceptionCode.h" |
| #include "JSArrayBuffer.h" |
| #include "JSDOMBinding.h" |
| #include <interpreter/CallFrame.h> |
| #include <runtime/ArgList.h> |
| #include <runtime/Error.h> |
| #include <runtime/JSObject.h> |
| #include <runtime/JSValue.h> |
| |
| namespace WebCore { |
| |
| template <class T> |
| JSC::JSValue setWebGLArrayHelper(JSC::ExecState* exec, T* impl, T* (*conversionFunc)(JSC::JSValue)) |
| { |
| if (exec->argumentCount() < 1) |
| return JSC::throwSyntaxError(exec); |
| |
| T* array = (*conversionFunc)(exec->argument(0)); |
| if (array) { |
| // void set(in WebGL<T>Array array, [Optional] in unsigned long offset); |
| unsigned offset = 0; |
| if (exec->argumentCount() == 2) |
| offset = exec->argument(1).toInt32(exec); |
| ExceptionCode ec = 0; |
| impl->set(array, offset, ec); |
| setDOMException(exec, ec); |
| return JSC::jsUndefined(); |
| } |
| |
| if (exec->argument(0).isObject()) { |
| // void set(in sequence<long> array, [Optional] in unsigned long offset); |
| JSC::JSObject* array = JSC::asObject(exec->argument(0)); |
| uint32_t offset = 0; |
| if (exec->argumentCount() == 2) |
| offset = exec->argument(1).toInt32(exec); |
| uint32_t length = array->get(exec, JSC::Identifier(exec, "length")).toInt32(exec); |
| if (offset > impl->length() |
| || offset + length > impl->length() |
| || offset + length < offset) |
| setDOMException(exec, INDEX_SIZE_ERR); |
| else { |
| for (uint32_t i = 0; i < length; i++) { |
| JSC::JSValue v = array->get(exec, i); |
| if (exec->hadException()) |
| return JSC::jsUndefined(); |
| impl->set(i + offset, v.toNumber(exec)); |
| } |
| } |
| |
| return JSC::jsUndefined(); |
| } |
| |
| return JSC::throwSyntaxError(exec); |
| } |
| |
| // Template function used by XXXArrayConstructors. |
| // If this returns 0, it will already have thrown a JavaScript exception. |
| template<class C, typename T> |
| PassRefPtr<C> constructArrayBufferViewWithArrayBufferArgument(JSC::ExecState* exec) |
| { |
| RefPtr<ArrayBuffer> buffer = toArrayBuffer(exec->argument(0)); |
| if (!buffer) |
| return 0; |
| |
| unsigned offset = (exec->argumentCount() > 1) ? exec->argument(1).toUInt32(exec) : 0; |
| if ((buffer->byteLength() - offset) % sizeof(T)) |
| throwError(exec, createRangeError(exec, "ArrayBuffer length minus the byteOffset is not a multiple of the element size.")); |
| unsigned int length = (buffer->byteLength() - offset) / sizeof(T); |
| if (exec->argumentCount() > 2) |
| length = exec->argument(2).toUInt32(exec); |
| RefPtr<C> array = C::create(buffer, offset, length); |
| if (!array) |
| setDOMException(exec, INDEX_SIZE_ERR); |
| return array; |
| } |
| |
| template<class C, typename T> |
| PassRefPtr<C> constructArrayBufferView(JSC::ExecState* exec) |
| { |
| // There are 3 constructors: |
| // |
| // 1) (in int size) |
| // 2) (in ArrayBuffer buffer, [Optional] in int offset, [Optional] in unsigned int length) |
| // 3) (in sequence<T>) - This ends up being a JS "array-like" object |
| // |
| // For the 0 args case, just create a zero-length view. We could |
| // consider raising a SyntaxError for this case, but not all |
| // JavaScript DOM bindings can distinguish between "new |
| // <Type>Array()" and what occurs when a previously-constructed |
| // ArrayBufferView is returned to JavaScript; e.g., from |
| // "array.subset()". |
| if (exec->argumentCount() < 1) |
| return C::create(0); |
| |
| if (exec->argument(0).isNull()) { |
| // Invalid first argument |
| throwTypeError(exec); |
| return 0; |
| } |
| |
| if (exec->argument(0).isObject()) { |
| RefPtr<C> view = constructArrayBufferViewWithArrayBufferArgument<C, T>(exec); |
| if (view) |
| return view; |
| |
| JSC::JSObject* srcArray = asObject(exec->argument(0)); |
| uint32_t length = srcArray->get(exec, JSC::Identifier(exec, "length")).toUInt32(exec); |
| RefPtr<C> array = C::create(length); |
| if (!array) { |
| setDOMException(exec, INDEX_SIZE_ERR); |
| return array; |
| } |
| |
| for (unsigned i = 0; i < length; ++i) { |
| JSC::JSValue v = srcArray->get(exec, i); |
| array->set(i, v.toNumber(exec)); |
| } |
| return array; |
| } |
| |
| int length = exec->argument(0).toInt32(exec); |
| RefPtr<C> result; |
| if (length >= 0) |
| result = C::create(static_cast<unsigned>(length)); |
| if (!result) |
| throwError(exec, createRangeError(exec, "ArrayBufferView size is not a small enough positive integer.")); |
| return result; |
| } |
| |
| template <typename JSType, typename WebCoreType> |
| static JSC::JSValue toJSArrayBufferView(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, WebCoreType* object) |
| { |
| if (!object) |
| return JSC::jsNull(); |
| |
| if (JSDOMWrapper* wrapper = getCachedWrapper(currentWorld(exec), object)) |
| return wrapper; |
| |
| exec->heap()->reportExtraMemoryCost(object->byteLength()); |
| return createWrapper<JSType>(exec, globalObject, object); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // JSArrayBufferViewHelper_h |