1 /*
2 * Copyright (C) 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2009 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef JSArrayBufferViewHelper_h
28 #define JSArrayBufferViewHelper_h
29
30 #include "ArrayBufferView.h"
31 #include "ExceptionCode.h"
32 #include "JSArrayBuffer.h"
33 #include "JSDOMBinding.h"
34 #include <interpreter/CallFrame.h>
35 #include <runtime/ArgList.h>
36 #include <runtime/Error.h>
37 #include <runtime/JSObject.h>
38 #include <runtime/JSValue.h>
39
40 namespace WebCore {
41
42 template <class T>
setWebGLArrayHelper(JSC::ExecState * exec,T * impl,T * (* conversionFunc)(JSC::JSValue))43 JSC::JSValue setWebGLArrayHelper(JSC::ExecState* exec, T* impl, T* (*conversionFunc)(JSC::JSValue))
44 {
45 if (exec->argumentCount() < 1)
46 return JSC::throwSyntaxError(exec);
47
48 T* array = (*conversionFunc)(exec->argument(0));
49 if (array) {
50 // void set(in WebGL<T>Array array, [Optional] in unsigned long offset);
51 unsigned offset = 0;
52 if (exec->argumentCount() == 2)
53 offset = exec->argument(1).toInt32(exec);
54 ExceptionCode ec = 0;
55 impl->set(array, offset, ec);
56 setDOMException(exec, ec);
57 return JSC::jsUndefined();
58 }
59
60 if (exec->argument(0).isObject()) {
61 // void set(in sequence<long> array, [Optional] in unsigned long offset);
62 JSC::JSObject* array = JSC::asObject(exec->argument(0));
63 uint32_t offset = 0;
64 if (exec->argumentCount() == 2)
65 offset = exec->argument(1).toInt32(exec);
66 uint32_t length = array->get(exec, JSC::Identifier(exec, "length")).toInt32(exec);
67 if (offset > impl->length()
68 || offset + length > impl->length()
69 || offset + length < offset)
70 setDOMException(exec, INDEX_SIZE_ERR);
71 else {
72 for (uint32_t i = 0; i < length; i++) {
73 JSC::JSValue v = array->get(exec, i);
74 if (exec->hadException())
75 return JSC::jsUndefined();
76 impl->set(i + offset, v.toNumber(exec));
77 }
78 }
79
80 return JSC::jsUndefined();
81 }
82
83 return JSC::throwSyntaxError(exec);
84 }
85
86 // Template function used by XXXArrayConstructors.
87 // If this returns 0, it will already have thrown a JavaScript exception.
88 template<class C, typename T>
constructArrayBufferViewWithArrayBufferArgument(JSC::ExecState * exec)89 PassRefPtr<C> constructArrayBufferViewWithArrayBufferArgument(JSC::ExecState* exec)
90 {
91 RefPtr<ArrayBuffer> buffer = toArrayBuffer(exec->argument(0));
92 if (!buffer)
93 return 0;
94
95 unsigned offset = (exec->argumentCount() > 1) ? exec->argument(1).toUInt32(exec) : 0;
96 if ((buffer->byteLength() - offset) % sizeof(T))
97 throwError(exec, createRangeError(exec, "ArrayBuffer length minus the byteOffset is not a multiple of the element size."));
98 unsigned int length = (buffer->byteLength() - offset) / sizeof(T);
99 if (exec->argumentCount() > 2)
100 length = exec->argument(2).toUInt32(exec);
101 RefPtr<C> array = C::create(buffer, offset, length);
102 if (!array)
103 setDOMException(exec, INDEX_SIZE_ERR);
104 return array;
105 }
106
107 template<class C, typename T>
constructArrayBufferView(JSC::ExecState * exec)108 PassRefPtr<C> constructArrayBufferView(JSC::ExecState* exec)
109 {
110 // There are 3 constructors:
111 //
112 // 1) (in int size)
113 // 2) (in ArrayBuffer buffer, [Optional] in int offset, [Optional] in unsigned int length)
114 // 3) (in sequence<T>) - This ends up being a JS "array-like" object
115 //
116 // For the 0 args case, just create a zero-length view. We could
117 // consider raising a SyntaxError for this case, but not all
118 // JavaScript DOM bindings can distinguish between "new
119 // <Type>Array()" and what occurs when a previously-constructed
120 // ArrayBufferView is returned to JavaScript; e.g., from
121 // "array.subset()".
122 if (exec->argumentCount() < 1)
123 return C::create(0);
124
125 if (exec->argument(0).isNull()) {
126 // Invalid first argument
127 throwTypeError(exec);
128 return 0;
129 }
130
131 if (exec->argument(0).isObject()) {
132 RefPtr<C> view = constructArrayBufferViewWithArrayBufferArgument<C, T>(exec);
133 if (view)
134 return view;
135
136 JSC::JSObject* srcArray = asObject(exec->argument(0));
137 uint32_t length = srcArray->get(exec, JSC::Identifier(exec, "length")).toUInt32(exec);
138 RefPtr<C> array = C::create(length);
139 if (!array) {
140 setDOMException(exec, INDEX_SIZE_ERR);
141 return array;
142 }
143
144 for (unsigned i = 0; i < length; ++i) {
145 JSC::JSValue v = srcArray->get(exec, i);
146 array->set(i, v.toNumber(exec));
147 }
148 return array;
149 }
150
151 int length = exec->argument(0).toInt32(exec);
152 RefPtr<C> result;
153 if (length >= 0)
154 result = C::create(static_cast<unsigned>(length));
155 if (!result)
156 throwError(exec, createRangeError(exec, "ArrayBufferView size is not a small enough positive integer."));
157 return result;
158 }
159
160 template <typename JSType, typename WebCoreType>
toJSArrayBufferView(JSC::ExecState * exec,JSDOMGlobalObject * globalObject,WebCoreType * object)161 static JSC::JSValue toJSArrayBufferView(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, WebCoreType* object)
162 {
163 if (!object)
164 return JSC::jsNull();
165
166 if (JSDOMWrapper* wrapper = getCachedWrapper(currentWorld(exec), object))
167 return wrapper;
168
169 exec->heap()->reportExtraMemoryCost(object->byteLength());
170 return createWrapper<JSType>(exec, globalObject, object);
171 }
172
173 } // namespace WebCore
174
175 #endif // JSArrayBufferViewHelper_h
176