Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 110 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wtf/ByteArray.h b/Source/JavaScriptCore/wtf/ByteArray.h
new file mode 100644
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+++ b/Source/JavaScriptCore/wtf/ByteArray.h
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+/*
+ * Copyright (C) 2009 Apple 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 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 ByteArray_h
+#define ByteArray_h
+
+#include <limits.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/Platform.h>
+#include <wtf/RefCounted.h>
+#include <wtf/StdLibExtras.h>
+
+namespace WTF {
+    class ByteArray : public RefCountedBase {
+    public:
+        unsigned length() const { return m_size; }
+
+        void set(unsigned index, double value)
+        {
+            if (index >= m_size)
+                return;
+            if (!(value > 0)) // Clamp NaN to 0
+                value = 0;
+            else if (value > 255)
+                value = 255;
+            m_data[index] = static_cast<unsigned char>(value + 0.5);
+        }
+
+        void set(unsigned index, unsigned char value)
+        {
+            if (index >= m_size)
+                return;
+            m_data[index] = value;
+        }
+
+        bool get(unsigned index, unsigned char& result) const
+        {
+            if (index >= m_size)
+                return false;
+            result = m_data[index];
+            return true;
+        }
+
+        unsigned char get(unsigned index) const
+        {
+            ASSERT(index < m_size);
+            return m_data[index];
+        }
+
+        unsigned char* data() { return m_data; }
+
+        void clear() { memset(m_data, 0, m_size); }
+
+        void deref()
+        {
+            if (derefBase()) {
+                // We allocated with new unsigned char[] in create(),
+                // and then used placement new to construct the object.
+                this->~ByteArray();
+                delete[] reinterpret_cast<unsigned char*>(this);
+            }
+        }
+
+        static PassRefPtr<ByteArray> create(size_t size);
+
+        static size_t offsetOfSize() { return OBJECT_OFFSETOF(ByteArray, m_size); }
+        static size_t offsetOfData() { return OBJECT_OFFSETOF(ByteArray, m_data); }
+
+    private:
+        ByteArray(size_t size)
+            : m_size(size)
+        {
+        }
+        size_t m_size;
+// MSVC can't handle correctly unsized array.
+// warning C4200: nonstandard extension used : zero-sized array in struct/union
+// Cannot generate copy-ctor or copy-assignment operator when UDT contains a zero-sized array
+#if COMPILER(MSVC) && !COMPILER(INTEL)
+        unsigned char m_data[INT_MAX];
+#else
+        unsigned char m_data[];
+#endif
+    };
+} // namespace WTF
+
+using WTF::ByteArray;
+
+#endif