--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/JSArrayBufferViewHelper.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,160 @@
+/*
+ * 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<ArrayBufferView> 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
+ //
+ RefPtr<C> arrayObject;
+
+ // 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.slice()".
+ 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<ArrayBuffer> buffer = toArrayBuffer(exec->argument(0));
+ if (buffer) {
+ unsigned offset = (exec->argumentCount() > 1) ? exec->argument(1).toUInt32(exec) : 0;
+ unsigned int length = (buffer->byteLength() - offset) / sizeof(T);
+ if (exec->argumentCount() > 2)
+ length = exec->argument(2).toUInt32(exec);
+ PassRefPtr<ArrayBufferView> array = C::create(buffer, offset, length);
+ if (!array)
+ setDOMException(exec, INDEX_SIZE_ERR);
+ return array;
+ }
+
+ JSC::JSObject* array = asObject(exec->argument(0));
+ unsigned length = array->get(exec, JSC::Identifier(exec, "length")).toUInt32(exec);
+ void* tempValues;
+ if (!tryFastCalloc(length, sizeof(T)).getValue(tempValues)) {
+ JSC::throwError(exec, createError(exec, "Error"));
+ return 0;
+ }
+
+ OwnFastMallocPtr<T> values(static_cast<T*>(tempValues));
+ for (unsigned i = 0; i < length; ++i) {
+ JSC::JSValue v = array->get(exec, i);
+ if (exec->hadException())
+ return 0;
+ values.get()[i] = static_cast<T>(v.toNumber(exec));
+ }
+
+ PassRefPtr<ArrayBufferView> result = C::create(values.get(), length);
+ if (!result)
+ setDOMException(exec, INDEX_SIZE_ERR);
+ return result;
+ }
+
+ int length = exec->argument(0).toInt32(exec);
+ PassRefPtr<ArrayBufferView> 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;
+}
+
+} // namespace WebCore
+
+#endif // JSArrayBufferViewHelper_h