68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
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// vim: set sts=8 ts=2 sw=2 tw=99 et:
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//
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// Copyright (C) 2013-2014, David Anderson and AlliedModders LLC
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of AlliedModders LLC nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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#ifndef _include_amtl_bits_h_
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#define _include_amtl_bits_h_
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#include <am-algorithm.h>
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namespace ke {
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static inline bool
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TryUint64Multiply(uint64_t left, uint64_t right, uint64_t *out)
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{
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uint64_t r = left * right;
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if (r != 0 && ((r / left) != right))
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return false;
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*out = r;
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return true;
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}
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static inline bool
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TryUint32Add(uint32_t left, uint32_t right, uint32_t *out)
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{
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if (left + right < Max(left, right))
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return false;
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*out = left + right;
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return true;
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}
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static inline bool
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TryUint64Add(uint64_t left, uint64_t right, uint64_t *out)
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{
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if (left + right < Max(left, right))
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return false;
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*out = left + right;
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return true;
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}
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} // namespace ke
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#endif // _include_amtl_bits_h_
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