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110 lines
4.1 KiB
C++
110 lines
4.1 KiB
C++
/* Copyright (C) 2026 Wildfire Games.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "lib/self_test.h"
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#include "lib/bits.h"
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//#define EQUALS(actual, expected) ENSURE((actual) == (expected))
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#define EQUALS TS_ASSERT_EQUALS
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class TestBits : public CxxTest::TestSuite
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{
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public:
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void test_Bit()
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{
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EQUALS(Bit<unsigned>(0), 1u);
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EQUALS(Bit<unsigned>(8), 0x100u);
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EQUALS(Bit<std::uint32_t>(31), static_cast<std::uint32_t>(0x80000000ul));
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EQUALS(Bit<std::uint64_t>(1), static_cast<std::uint64_t>(2));
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EQUALS(Bit<std::uint64_t>(32), static_cast<std::uint64_t>(0x100000000ull));
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EQUALS(Bit<std::uint64_t>(63), static_cast<std::uint64_t>(0x8000000000000000ull));
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}
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void test_IsBitSet()
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{
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EQUALS(IsBitSet(0u, 1), false);
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EQUALS(IsBitSet(1u, 1), false);
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EQUALS(IsBitSet(2u, 1), true);
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EQUALS(IsBitSet<std::uint32_t>(0xFFFFFFFFul, 0), true);
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EQUALS(IsBitSet<std::uint32_t>(0xFFFFFFFFul, 31), true);
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EQUALS(IsBitSet<std::uint64_t>(0xFFFFFFFFFFFFFFFFull, 0), true);
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EQUALS(IsBitSet<std::uint64_t>(0xFFFFFFFFFFFFFFFFull, 31), true);
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EQUALS(IsBitSet<std::uint64_t>(0xFFFFFFFFFFFFFFFFull, 32), true);
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EQUALS(IsBitSet<std::uint64_t>(0xFFFFFFFFFFFFFFFFull, 63), true);
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}
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void test_bit_mask()
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{
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EQUALS(bit_mask<std::uint16_t>(0), 0);
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EQUALS(bit_mask<std::uint16_t>(2), 0x3);
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EQUALS(bit_mask<std::uint16_t>(16), 0xFFFF);
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EQUALS(bit_mask<std::uint32_t>(0), 0u);
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EQUALS(bit_mask<std::uint32_t>(2), 0x3u);
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EQUALS(bit_mask<std::uint32_t>(32), 0xFFFFFFFFul);
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EQUALS(bit_mask<std::uint64_t>(0), 0u);
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EQUALS(bit_mask<std::uint64_t>(2), 0x3u);
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EQUALS(bit_mask<std::uint64_t>(32), 0xFFFFFFFFull);
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EQUALS(bit_mask<std::uint64_t>(64), 0xFFFFFFFFFFFFFFFFull);
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}
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void test_bits()
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{
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EQUALS(bits<std::uint16_t>(0xFFFF, 0, 15), 0xFFFF);
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EQUALS(bits<std::uint16_t>(0xFFFF, 0, 7), 0xFF);
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EQUALS(bits<std::uint16_t>(0xFFFF, 8, 15), 0xFF);
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EQUALS(bits<std::uint16_t>(0xFFFF, 14, 15), 0x3);
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EQUALS(bits<std::uint16_t>(0xAA55, 4, 11), 0xA5);
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EQUALS(bits<std::uint16_t>(0xAA55, 14, 15), 0x2);
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EQUALS(bits<std::uint32_t>(0ul, 0, 31), 0ul);
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EQUALS(bits<std::uint32_t>(0xFFFFFFFFul, 0, 31), 0xFFFFFFFFul);
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EQUALS(bits<std::uint64_t>(0ull, 0, 63), 0ull);
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EQUALS(bits<std::uint64_t>(0xFFFFFFFFull, 0, 31), 0xFFFFFFFFull);
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EQUALS(bits<std::uint64_t>(0x0000FFFFFFFF0000ull, 16, 47), 0xFFFFFFFFull);
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EQUALS(bits<std::uint64_t>(0xFFFFFFFFFFFFFFFFull, 0, 63), 0xFFFFFFFFFFFFFFFFull);
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EQUALS(bits<std::uint64_t>(0xA5A5A5A5A5A5A5A5ull, 32, 63), 0xA5A5A5A5ull);
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}
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void test_round_up()
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{
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EQUALS(round_up( 0u, 16u), 0u);
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EQUALS(round_up( 4u, 16u), 16u);
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EQUALS(round_up(15u, 16u), 16u);
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EQUALS(round_up(20u, 32u), 32u);
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EQUALS(round_up(29u, 32u), 32u);
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EQUALS(round_up(0x1000u, 0x1000u), 0x1000u);
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EQUALS(round_up(0x1001u, 0x1000u), 0x2000u);
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EQUALS(round_up(0x1900u, 0x1000u), 0x2000u);
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}
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void test_round_down()
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{
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EQUALS(round_down( 0u, 16u), 0u);
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EQUALS(round_down( 4u, 16u), 0u);
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EQUALS(round_down(15u, 16u), 0u);
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EQUALS(round_down(20u, 16u), 16u);
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EQUALS(round_down(29u, 16u), 16u);
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EQUALS(round_down(0x1900u, 0x1000u), 0x1000u);
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EQUALS(round_down(0x2001u, 0x2000u), 0x2000u);
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}
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};
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