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Unified Diff: Source/WTF/wtf/SaturatedArithmetic.h

Issue 14238015: Move Source/WTF/wtf to Source/wtf (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 7 years, 8 months ago
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Index: Source/WTF/wtf/SaturatedArithmetic.h
diff --git a/Source/WTF/wtf/SaturatedArithmetic.h b/Source/WTF/wtf/SaturatedArithmetic.h
deleted file mode 100644
index cf9e8e17efb57db26b78bbf4b1ae03b988b4b3c6..0000000000000000000000000000000000000000
--- a/Source/WTF/wtf/SaturatedArithmetic.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (c) 2012, 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:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * 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.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER 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 SaturatedArithmetic_h
-#define SaturatedArithmetic_h
-
-#include <limits>
-#include <stdint.h>
-#include <stdlib.h>
-
-inline int32_t saturatedAddition(int32_t a, int32_t b)
-{
- uint32_t ua = a;
- uint32_t ub = b;
- uint32_t result = ua + ub;
-
- // Can only overflow if the signed bit of the two values match. If the signed
- // bit of the result and one of the values differ it did overflow.
- if (!((ua ^ ub) >> 31) & (result ^ ua) >> 31)
- result = std::numeric_limits<int>::max() + (ua >> 31);
-
- return result;
-}
-
-inline int32_t saturatedSubtraction(int32_t a, int32_t b)
-{
- uint32_t ua = a;
- uint32_t ub = b;
- uint32_t result = ua - ub;
-
- // Can only overflow if the signed bit of the two values do not match. If the
- // signed bit of the result and the first value differ it did overflow.
- if ((ua ^ ub) >> 31 & (result ^ ua) >> 31)
- result = std::numeric_limits<int>::max() + (ua >> 31);
-
- return result;
-}
-
-#endif // SaturatedArithmetic_h
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