зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
3.3 KiB
C++
88 строки
3.3 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/MathAlgorithms.h"
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using mozilla::Clamp;
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using mozilla::IsPowerOfTwo;
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static void
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TestClamp()
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{
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MOZ_RELEASE_ASSERT(Clamp(0, 0, 0) == 0);
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MOZ_RELEASE_ASSERT(Clamp(1, 0, 0) == 0);
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MOZ_RELEASE_ASSERT(Clamp(-1, 0, 0) == 0);
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MOZ_RELEASE_ASSERT(Clamp(0, 1, 1) == 1);
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MOZ_RELEASE_ASSERT(Clamp(0, 1, 2) == 1);
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MOZ_RELEASE_ASSERT(Clamp(0, -1, -1) == -1);
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MOZ_RELEASE_ASSERT(Clamp(0, -2, -1) == -1);
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MOZ_RELEASE_ASSERT(Clamp(0, 1, 3) == 1);
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MOZ_RELEASE_ASSERT(Clamp(1, 1, 3) == 1);
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MOZ_RELEASE_ASSERT(Clamp(2, 1, 3) == 2);
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MOZ_RELEASE_ASSERT(Clamp(3, 1, 3) == 3);
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MOZ_RELEASE_ASSERT(Clamp(4, 1, 3) == 3);
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MOZ_RELEASE_ASSERT(Clamp(5, 1, 3) == 3);
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MOZ_RELEASE_ASSERT(Clamp<uint8_t>(UINT8_MAX, 0, UINT8_MAX) == UINT8_MAX);
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MOZ_RELEASE_ASSERT(Clamp<uint8_t>(0, 0, UINT8_MAX) == 0);
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MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MIN, INT8_MIN, INT8_MAX) == INT8_MIN);
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MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MIN, 0, INT8_MAX) == 0);
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MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MAX, INT8_MIN, INT8_MAX) == INT8_MAX);
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MOZ_RELEASE_ASSERT(Clamp<int8_t>(INT8_MAX, INT8_MIN, 0) == 0);
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}
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static void
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TestIsPowerOfTwo()
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{
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(0u));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(1u));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(2u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(3u));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(4u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(5u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(6u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(7u));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(8u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(9u));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint8_t(UINT8_MAX/2))); // 127, 0x7f
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(uint8_t(UINT8_MAX/2 + 1))); // 128, 0x80
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint8_t(UINT8_MAX/2 + 2))); // 129, 0x81
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint8_t(UINT8_MAX - 1))); // 254, 0xfe
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint8_t(UINT8_MAX))); // 255, 0xff
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint16_t(UINT16_MAX/2))); // 0x7fff
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(uint16_t(UINT16_MAX/2 + 1))); // 0x8000
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint16_t(UINT16_MAX/2 + 2))); // 0x8001
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint16_t(UINT16_MAX - 1))); // 0xfffe
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint16_t(UINT16_MAX))); // 0xffff
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint32_t(UINT32_MAX/2)));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(uint32_t(UINT32_MAX/2 + 1)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint32_t(UINT32_MAX/2 + 2)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint32_t(UINT32_MAX - 1)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint32_t(UINT32_MAX)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint64_t(UINT64_MAX/2)));
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MOZ_RELEASE_ASSERT( IsPowerOfTwo(uint64_t(UINT64_MAX/2 + 1)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint64_t(UINT64_MAX/2 + 2)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint64_t(UINT64_MAX - 1)));
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MOZ_RELEASE_ASSERT(!IsPowerOfTwo(uint64_t(UINT64_MAX)));
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}
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int
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main()
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{
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TestIsPowerOfTwo();
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TestClamp();
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return 0;
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}
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