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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
commit32761a6cee1d0dee366b885b7b9c777e67885688 (patch)
treed6bec92bebfb216f4126356e55518842c2f476a1 /Source/JavaScriptCore/runtime/GenericOffset.h
parenta4e969f4965059196ca948db781e52f7cfebf19e (diff)
downloadWebKitGtk-tarball-32761a6cee1d0dee366b885b7b9c777e67885688.tar.gz
webkitgtk-2.4.11webkitgtk-2.4.11
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diff --git a/Source/JavaScriptCore/runtime/GenericOffset.h b/Source/JavaScriptCore/runtime/GenericOffset.h
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-/*
- * Copyright (C) 2015 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 GenericOffset_h
-#define GenericOffset_h
-
-#include <limits.h>
-#include <wtf/Assertions.h>
-
-namespace JSC {
-
-// A mixin for creating the various kinds of variable offsets that our engine supports.
-template<typename T>
-class GenericOffset {
- WTF_MAKE_FAST_ALLOCATED;
-public:
- static const unsigned invalidOffset = UINT_MAX;
-
- GenericOffset()
- : m_offset(invalidOffset)
- {
- }
-
- explicit GenericOffset(unsigned offset)
- : m_offset(offset)
- {
- }
-
- bool operator!() const { return m_offset == invalidOffset; }
-
- unsigned offsetUnchecked() const
- {
- return m_offset;
- }
-
- unsigned offset() const
- {
- ASSERT(m_offset != invalidOffset);
- return m_offset;
- }
-
- bool operator==(const T& other) const
- {
- return m_offset == other.offsetUnchecked();
- }
- bool operator!=(const T& other) const
- {
- return m_offset != other.offsetUnchecked();
- }
- bool operator<(const T& other) const
- {
- return m_offset < other.offsetUnchecked();
- }
- bool operator>(const T& other) const
- {
- return m_offset > other.offsetUnchecked();
- }
- bool operator<=(const T& other) const
- {
- return m_offset <= other.offsetUnchecked();
- }
- bool operator>=(const T& other) const
- {
- return m_offset >= other.offsetUnchecked();
- }
-
- T operator+(int value) const
- {
- return T(offset() + value);
- }
- T operator-(int value) const
- {
- return T(offset() - value);
- }
- T& operator+=(int value)
- {
- return *this = *this + value;
- }
- T& operator-=(int value)
- {
- return *this = *this - value;
- }
-
-private:
- unsigned m_offset;
-};
-
-} // namespace JSC
-
-#endif // GenericOffset_h
-