mirror of
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512 lines
15 KiB
C++
512 lines
15 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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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
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <thirdparty/protobuf/stubs/int128.h>
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#include <algorithm>
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#include <sstream>
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#include <utility>
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#include <thirdparty/protobuf/testing/googletest.h>
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#include <gtest/gtest.h>
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#include <thirdparty/protobuf/port_def.inc>
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namespace google {
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namespace protobuf {
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TEST(Int128, AllTests) {
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uint128 zero(0);
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uint128 one(1);
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uint128 one_2arg(0, 1);
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uint128 two(0, 2);
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uint128 three(0, 3);
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uint128 big(2000, 2);
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uint128 big_minus_one(2000, 1);
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uint128 bigger(2001, 1);
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uint128 biggest(kuint128max);
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uint128 high_low(1, 0);
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uint128 low_high(0, kuint64max);
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EXPECT_LT(one, two);
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EXPECT_GT(two, one);
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EXPECT_LT(one, big);
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EXPECT_LT(one, big);
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EXPECT_EQ(one, one_2arg);
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EXPECT_NE(one, two);
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EXPECT_GT(big, one);
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EXPECT_GE(big, two);
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EXPECT_GE(big, big_minus_one);
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EXPECT_GT(big, big_minus_one);
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EXPECT_LT(big_minus_one, big);
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EXPECT_LE(big_minus_one, big);
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EXPECT_NE(big_minus_one, big);
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EXPECT_LT(big, biggest);
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EXPECT_LE(big, biggest);
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EXPECT_GT(biggest, big);
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EXPECT_GE(biggest, big);
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EXPECT_EQ(big, ~~big);
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EXPECT_EQ(one, one | one);
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EXPECT_EQ(big, big | big);
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EXPECT_EQ(one, one | zero);
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EXPECT_EQ(one, one & one);
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EXPECT_EQ(big, big & big);
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EXPECT_EQ(zero, one & zero);
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EXPECT_EQ(zero, big & ~big);
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EXPECT_EQ(zero, one ^ one);
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EXPECT_EQ(zero, big ^ big);
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EXPECT_EQ(one, one ^ zero);
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// Shift operators.
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EXPECT_EQ(big, big << 0);
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EXPECT_EQ(big, big >> 0);
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EXPECT_GT(big << 1, big);
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EXPECT_LT(big >> 1, big);
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EXPECT_EQ(big, (big << 10) >> 10);
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EXPECT_EQ(big, (big >> 1) << 1);
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EXPECT_EQ(one, (one << 80) >> 80);
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EXPECT_EQ(zero, (one >> 80) << 80);
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EXPECT_EQ(zero, big >> 128);
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EXPECT_EQ(zero, big << 128);
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// Shift assignments.
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uint128 big_copy = big;
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EXPECT_EQ(big << 0, big_copy <<= 0);
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big_copy = big;
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EXPECT_EQ(big >> 0, big_copy >>= 0);
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big_copy = big;
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EXPECT_EQ(big << 1, big_copy <<= 1);
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big_copy = big;
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EXPECT_EQ(big >> 1, big_copy >>= 1);
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big_copy = big;
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EXPECT_EQ(big << 10, big_copy <<= 10);
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big_copy = big;
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EXPECT_EQ(big >> 10, big_copy >>= 10);
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big_copy = big;
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EXPECT_EQ(big << 64, big_copy <<= 64);
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big_copy = big;
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EXPECT_EQ(big >> 64, big_copy >>= 64);
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big_copy = big;
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EXPECT_EQ(big << 73, big_copy <<= 73);
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big_copy = big;
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EXPECT_EQ(big >> 73, big_copy >>= 73);
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big_copy = big;
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EXPECT_EQ(big << 128, big_copy <<= 128);
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big_copy = big;
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EXPECT_EQ(big >> 128, big_copy >>= 128);
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EXPECT_EQ(Uint128High64(biggest), kuint64max);
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EXPECT_EQ(Uint128Low64(biggest), kuint64max);
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EXPECT_EQ(zero + one, one);
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EXPECT_EQ(one + one, two);
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EXPECT_EQ(big_minus_one + one, big);
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EXPECT_EQ(one - one, zero);
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EXPECT_EQ(one - zero, one);
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EXPECT_EQ(zero - one, biggest);
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EXPECT_EQ(big - big, zero);
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EXPECT_EQ(big - one, big_minus_one);
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EXPECT_EQ(big + kuint64max, bigger);
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EXPECT_EQ(biggest + 1, zero);
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EXPECT_EQ(zero - 1, biggest);
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EXPECT_EQ(high_low - one, low_high);
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EXPECT_EQ(low_high + one, high_low);
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EXPECT_EQ(Uint128High64((uint128(1) << 64) - 1), 0);
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EXPECT_EQ(Uint128Low64((uint128(1) << 64) - 1), kuint64max);
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EXPECT_TRUE(!!one);
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EXPECT_TRUE(!!high_low);
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EXPECT_FALSE(!!zero);
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EXPECT_FALSE(!one);
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EXPECT_FALSE(!high_low);
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EXPECT_TRUE(!zero);
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EXPECT_TRUE(zero == 0);
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EXPECT_FALSE(zero != 0);
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EXPECT_FALSE(one == 0);
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EXPECT_TRUE(one != 0);
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uint128 test = zero;
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EXPECT_EQ(++test, one);
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EXPECT_EQ(test, one);
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EXPECT_EQ(test++, one);
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EXPECT_EQ(test, two);
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EXPECT_EQ(test -= 2, zero);
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EXPECT_EQ(test, zero);
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EXPECT_EQ(test += 2, two);
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EXPECT_EQ(test, two);
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EXPECT_EQ(--test, one);
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EXPECT_EQ(test, one);
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EXPECT_EQ(test--, one);
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EXPECT_EQ(test, zero);
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EXPECT_EQ(test |= three, three);
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EXPECT_EQ(test &= one, one);
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EXPECT_EQ(test ^= three, two);
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EXPECT_EQ(test >>= 1, one);
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EXPECT_EQ(test <<= 1, two);
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EXPECT_EQ(big, -(-big));
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EXPECT_EQ(two, -((-one) - 1));
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EXPECT_EQ(kuint128max, -one);
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EXPECT_EQ(zero, -zero);
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GOOGLE_LOG(INFO) << one;
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GOOGLE_LOG(INFO) << big_minus_one;
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}
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TEST(Int128, PodTests) {
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uint128_pod pod = { 12345, 67890 };
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uint128 from_pod(pod);
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EXPECT_EQ(12345, Uint128High64(from_pod));
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EXPECT_EQ(67890, Uint128Low64(from_pod));
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uint128 zero(0);
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uint128_pod zero_pod = {0, 0};
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uint128 one(1);
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uint128_pod one_pod = {0, 1};
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uint128 two(2);
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uint128_pod two_pod = {0, 2};
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uint128 three(3);
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uint128_pod three_pod = {0, 3};
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uint128 big(1, 0);
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uint128_pod big_pod = {1, 0};
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EXPECT_EQ(zero, zero_pod);
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EXPECT_EQ(zero_pod, zero);
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EXPECT_EQ(zero_pod, zero_pod);
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EXPECT_EQ(one, one_pod);
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EXPECT_EQ(one_pod, one);
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EXPECT_EQ(one_pod, one_pod);
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EXPECT_EQ(two, two_pod);
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EXPECT_EQ(two_pod, two);
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EXPECT_EQ(two_pod, two_pod);
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EXPECT_NE(one, two_pod);
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EXPECT_NE(one_pod, two);
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EXPECT_NE(one_pod, two_pod);
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EXPECT_LT(one, two_pod);
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EXPECT_LT(one_pod, two);
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EXPECT_LT(one_pod, two_pod);
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EXPECT_LE(one, one_pod);
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EXPECT_LE(one_pod, one);
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EXPECT_LE(one_pod, one_pod);
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EXPECT_LE(one, two_pod);
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EXPECT_LE(one_pod, two);
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EXPECT_LE(one_pod, two_pod);
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EXPECT_GT(two, one_pod);
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EXPECT_GT(two_pod, one);
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EXPECT_GT(two_pod, one_pod);
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EXPECT_GE(two, two_pod);
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EXPECT_GE(two_pod, two);
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EXPECT_GE(two_pod, two_pod);
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EXPECT_GE(two, one_pod);
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EXPECT_GE(two_pod, one);
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EXPECT_GE(two_pod, one_pod);
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EXPECT_EQ(three, one | two_pod);
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EXPECT_EQ(three, one_pod | two);
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EXPECT_EQ(three, one_pod | two_pod);
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EXPECT_EQ(one, three & one_pod);
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EXPECT_EQ(one, three_pod & one);
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EXPECT_EQ(one, three_pod & one_pod);
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EXPECT_EQ(two, three ^ one_pod);
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EXPECT_EQ(two, three_pod ^ one);
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EXPECT_EQ(two, three_pod ^ one_pod);
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EXPECT_EQ(two, three & (~one));
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EXPECT_EQ(three, ~~three);
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EXPECT_EQ(two, two_pod << 0);
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EXPECT_EQ(two, one_pod << 1);
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EXPECT_EQ(big, one_pod << 64);
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EXPECT_EQ(zero, one_pod << 128);
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EXPECT_EQ(two, two_pod >> 0);
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EXPECT_EQ(one, two_pod >> 1);
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EXPECT_EQ(one, big_pod >> 64);
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EXPECT_EQ(one, zero + one_pod);
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EXPECT_EQ(one, zero_pod + one);
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EXPECT_EQ(one, zero_pod + one_pod);
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EXPECT_EQ(one, two - one_pod);
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EXPECT_EQ(one, two_pod - one);
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EXPECT_EQ(one, two_pod - one_pod);
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}
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TEST(Int128, OperatorAssignReturnRef) {
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uint128 v(1);
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(v += 4) -= 3;
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EXPECT_EQ(2, v);
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}
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TEST(Int128, Multiply) {
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uint128 a, b, c;
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// Zero test.
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a = 0;
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b = 0;
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c = a * b;
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EXPECT_EQ(0, c);
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// Max carries.
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a = uint128(0) - 1;
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b = uint128(0) - 1;
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c = a * b;
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EXPECT_EQ(1, c);
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// Self-operation with max carries.
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c = uint128(0) - 1;
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c *= c;
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EXPECT_EQ(1, c);
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// 1-bit x 1-bit.
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for (int i = 0; i < 64; ++i) {
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for (int j = 0; j < 64; ++j) {
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a = uint128(1) << i;
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b = uint128(1) << j;
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c = a * b;
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EXPECT_EQ(uint128(1) << (i+j), c);
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}
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}
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// Verified with dc.
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a = uint128(uint64_t{0xffffeeeeddddccccu}, uint64_t{0xbbbbaaaa99998888u});
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b = uint128(uint64_t{0x7777666655554444u}, uint64_t{0x3333222211110000u});
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c = a * b;
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EXPECT_EQ(
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uint128(uint64_t{0x530EDA741C71D4C3u}, uint64_t{0xBF25975319080000u}), c);
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EXPECT_EQ(0, c - b * a);
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EXPECT_EQ(a * a - b * b, (a + b) * (a - b));
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// Verified with dc.
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a = uint128(uint64_t{0x0123456789abcdefu}, uint64_t{0xfedcba9876543210u});
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b = uint128(uint64_t{0x02468ace13579bdfu}, uint64_t{0xfdb97531eca86420u});
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c = a * b;
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EXPECT_EQ(
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uint128(uint64_t{0x97a87f4f261ba3f2u}, uint64_t{0x342d0bbf48948200u}), c);
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EXPECT_EQ(0, c - b * a);
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EXPECT_EQ(a*a - b*b, (a+b) * (a-b));
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}
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TEST(Int128, AliasTests) {
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uint128 x1(1, 2);
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uint128 x2(2, 4);
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x1 += x1;
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EXPECT_EQ(x2, x1);
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uint128 x3(1, static_cast<uint64>(1) << 63);
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uint128 x4(3, 0);
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x3 += x3;
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EXPECT_EQ(x4, x3);
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}
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#ifdef PROTOBUF_HAS_DEATH_TEST
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TEST(Int128, DivideByZeroCheckFails) {
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uint128 a = 0;
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uint128 b = 0;
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EXPECT_DEATH(a / b, "Division or mod by zero:");
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a = 123;
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EXPECT_DEATH(a / b, "Division or mod by zero:");
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}
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TEST(Int128, ModByZeroCheckFails) {
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uint128 a = 0;
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uint128 b = 0;
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EXPECT_DEATH(a % b, "Division or mod by zero:");
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a = 123;
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EXPECT_DEATH(a % b, "Division or mod by zero:");
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}
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#endif // PROTOBUF_HAS_DEATH_TEST
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TEST(Int128, DivideAndMod) {
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// a := q * b + r
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uint128 a, b, q, r;
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// Zero test.
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a = 0;
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b = 123;
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q = a / b;
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r = a % b;
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EXPECT_EQ(0, q);
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EXPECT_EQ(0, r);
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a = uint128(uint64_t{0x530eda741c71d4c3u}, uint64_t{0xbf25975319080000u});
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q = uint128(uint64_t{0x4de2cab081u}, uint64_t{0x14c34ab4676e4babu});
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b = uint128(0x1110001);
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r = uint128(0x3eb455);
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ASSERT_EQ(a, q * b + r); // Sanity-check.
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uint128 result_q, result_r;
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result_q = a / b;
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result_r = a % b;
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EXPECT_EQ(q, result_q);
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EXPECT_EQ(r, result_r);
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// Try the other way around.
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std::swap(q, b);
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result_q = a / b;
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result_r = a % b;
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EXPECT_EQ(q, result_q);
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EXPECT_EQ(r, result_r);
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// Restore.
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std::swap(b, q);
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// Dividend < divisor; result should be q:0 r:<dividend>.
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std::swap(a, b);
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result_q = a / b;
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result_r = a % b;
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EXPECT_EQ(0, result_q);
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EXPECT_EQ(a, result_r);
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// Try the other way around.
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std::swap(a, q);
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result_q = a / b;
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result_r = a % b;
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EXPECT_EQ(0, result_q);
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EXPECT_EQ(a, result_r);
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// Restore.
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std::swap(q, a);
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std::swap(b, a);
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// Try a large remainder.
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b = a / 2 + 1;
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uint128 expected_r(uint64_t{0x29876d3a0e38ea61u},
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uint64_t{0xdf92cba98c83ffffu});
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// Sanity checks.
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ASSERT_EQ(a / 2 - 1, expected_r);
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ASSERT_EQ(a, b + expected_r);
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result_q = a / b;
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result_r = a % b;
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EXPECT_EQ(1, result_q);
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EXPECT_EQ(expected_r, result_r);
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}
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static uint64 RandomUint64() {
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uint64 v1 = rand();
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uint64 v2 = rand();
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uint64 v3 = rand();
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return v1 * v2 + v3;
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}
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TEST(Int128, DivideAndModRandomInputs) {
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const int kNumIters = 1 << 18;
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for (int i = 0; i < kNumIters; ++i) {
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const uint128 a(RandomUint64(), RandomUint64());
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const uint128 b(RandomUint64(), RandomUint64());
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if (b == 0) {
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continue; // Avoid a div-by-zero.
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}
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const uint128 q = a / b;
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const uint128 r = a % b;
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ASSERT_EQ(a, b * q + r);
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}
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}
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#ifdef GOOGLE_PROTOBUF_HAS_CONSTEXPR
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TEST(Int128, ConstexprTest) {
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constexpr uint128 zero;
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constexpr uint128 one = 1;
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constexpr uint128_pod pod = {2, 3};
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constexpr uint128 from_pod = pod;
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constexpr uint128 minus_two = -2;
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EXPECT_EQ(one, uint128(1));
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EXPECT_EQ(from_pod, uint128(2, 3));
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EXPECT_EQ(minus_two, uint128(-1ULL, -2ULL));
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}
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TEST(Int128, Traits) {
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EXPECT_TRUE(std::is_trivially_copy_constructible<uint128>::value);
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EXPECT_TRUE(std::is_trivially_copy_assignable<uint128>::value);
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EXPECT_TRUE(std::is_trivially_destructible<uint128>::value);
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}
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#endif // GOOGLE_PROTOBUF_HAS_CONSTEXPR
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TEST(Int128, OStream) {
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struct {
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uint128 val;
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std::ios_base::fmtflags flags;
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std::streamsize width;
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char fill;
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const char* rep;
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} cases[] = {
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// zero with different bases
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{uint128(0), std::ios::dec, 0, '_', "0"},
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{uint128(0), std::ios::oct, 0, '_', "0"},
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{uint128(0), std::ios::hex, 0, '_', "0"},
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// crossover between lo_ and hi_
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{uint128(0, -1), std::ios::dec, 0, '_', "18446744073709551615"},
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{uint128(0, -1), std::ios::oct, 0, '_', "1777777777777777777777"},
|
|
{uint128(0, -1), std::ios::hex, 0, '_', "ffffffffffffffff"},
|
|
{uint128(1, 0), std::ios::dec, 0, '_', "18446744073709551616"},
|
|
{uint128(1, 0), std::ios::oct, 0, '_', "2000000000000000000000"},
|
|
{uint128(1, 0), std::ios::hex, 0, '_', "10000000000000000"},
|
|
// just the top bit
|
|
{uint128(uint64_t{0x8000000000000000u}, 0), std::ios::dec, 0, '_',
|
|
"170141183460469231731687303715884105728"},
|
|
{uint128(uint64_t{0x8000000000000000u}, 0), std::ios::oct, 0, '_',
|
|
"2000000000000000000000000000000000000000000"},
|
|
{uint128(uint64_t{0x8000000000000000u}, 0), std::ios::hex, 0, '_',
|
|
"80000000000000000000000000000000"},
|
|
// maximum uint128 value
|
|
{uint128(-1, -1), std::ios::dec, 0, '_',
|
|
"340282366920938463463374607431768211455"},
|
|
{uint128(-1, -1), std::ios::oct, 0, '_',
|
|
"3777777777777777777777777777777777777777777"},
|
|
{uint128(-1, -1), std::ios::hex, 0, '_',
|
|
"ffffffffffffffffffffffffffffffff"},
|
|
// uppercase
|
|
{uint128(-1, -1), std::ios::hex | std::ios::uppercase, 0, '_',
|
|
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"},
|
|
// showbase
|
|
{uint128(1), std::ios::dec | std::ios::showbase, 0, '_', "1"},
|
|
{uint128(1), std::ios::oct | std::ios::showbase, 0, '_', "01"},
|
|
{uint128(1), std::ios::hex | std::ios::showbase, 0, '_', "0x1"},
|
|
// showbase does nothing on zero
|
|
{uint128(0), std::ios::dec | std::ios::showbase, 0, '_', "0"},
|
|
{uint128(0), std::ios::oct | std::ios::showbase, 0, '_', "0"},
|
|
{uint128(0), std::ios::hex | std::ios::showbase, 0, '_', "0"},
|
|
// showpos does nothing on unsigned types
|
|
{uint128(1), std::ios::dec | std::ios::showpos, 0, '_', "1"},
|
|
// padding
|
|
{uint128(9), std::ios::dec, 6, '_', "_____9"},
|
|
{uint128(12345), std::ios::dec, 6, '_', "_12345"},
|
|
// left adjustment
|
|
{uint128(9), std::ios::dec | std::ios::left, 6, '_', "9_____"},
|
|
{uint128(12345), std::ios::dec | std::ios::left, 6, '_', "12345_"},
|
|
};
|
|
for (size_t i = 0; i < GOOGLE_ARRAYSIZE(cases); ++i) {
|
|
std::ostringstream os;
|
|
os.flags(cases[i].flags);
|
|
os.width(cases[i].width);
|
|
os.fill(cases[i].fill);
|
|
os << cases[i].val;
|
|
EXPECT_EQ(cases[i].rep, os.str());
|
|
}
|
|
}
|
|
} // namespace protobuf
|
|
} // namespace google
|
|
|
|
#include <thirdparty/protobuf/port_undef.inc>
|