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72 lines
2.7 KiB
C++
72 lines
2.7 KiB
C++
#include <catch2/catch.hpp>
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#include <llarp/util/bits.hpp>
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using namespace llarp::bits;
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TEST_CASE("test bit counting, 8-bit", "[bits]") {
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// Workaround for gcc 5's stdlib; we can drop this crap (and drop all the `T`'s below) once we
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// stop supporting it.
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using T = std::tuple<unsigned char, size_t>;
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auto x = GENERATE(table<unsigned char, size_t>({
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T{0b00000000, 0},
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T{0b00000001, 1},
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T{0b00000010, 1},
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T{0b00000100, 1},
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T{0b00001000, 1},
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T{0b00010000, 1},
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T{0b00100000, 1},
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T{0b01000000, 1},
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T{0b10000000, 1},
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T{0b11111111, 8},
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}));
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std::array<unsigned char, 1> arr{{std::get<0>(x)}};
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auto expected = std::get<1>(x);
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REQUIRE( count_array_bits(arr) == expected );
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}
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TEST_CASE("test bit counting, 20 x 8-bit", "[bits]") {
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std::array<unsigned char, 20> x{{
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0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000,
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0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000,
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0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000,
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0b00000000, 0b00000000, 0b00000000, 0b00000000, 0b00000000}};
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REQUIRE( count_array_bits(x) == 0 );
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x = {{
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0b11111111, 0b00000100, 0b00000100, 0b00000100, 0b00000100,
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0b11111111, 0b00000100, 0b00000100, 0b00000100, 0b00000100,
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0b11111111, 0b00000100, 0b00000100, 0b00000100, 0b00000100,
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0b11111111, 0b00000100, 0b00000100, 0b00000100, 0b00000100}};
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REQUIRE( count_array_bits(x) == 48 );
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}
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TEST_CASE("test bit counting, unsigned int", "[bits]") {
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using T = std::tuple<unsigned int, size_t>; // gcc 5 workaround
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auto x = GENERATE(table<unsigned int, size_t>({
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T{0b00000000000000000000000000000000, 0},
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T{0b00101010101010101010101010101010, 15},
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T{0b10101010101010101010101010101010, 16},
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T{0b01010101010101010101010101010101, 16},
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T{0b11111111111111111111111111111111, 32},
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}));
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std::array<unsigned int, 1> arr{{std::get<0>(x)}};
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auto expected = std::get<1>(x);
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REQUIRE( llarp::bits::count_array_bits(arr) == expected );
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}
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TEST_CASE("test bit counting, unsigned long long", "[bits]") {
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using T = std::tuple<unsigned long long, size_t>; // gcc 5 workaround
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auto x = GENERATE(table<unsigned long long, size_t>({
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T{0b0000000000000000000000000000000000000000000000000000000000000000, 0},
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T{0b0010101010101010101010101010101000101010101010101010101010101010, 30},
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T{0b1010101010101010101010101010101010101010101010101010101010101010, 32},
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T{0b0101010101010101010101010101010101010101010101010101010101010101, 32},
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T{0b1111111111111111111111111111111111111111111111111111111111111111, 64},
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}));
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std::array<unsigned long long, 1> arr{{std::get<0>(x)}};
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auto expected = std::get<1>(x);
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REQUIRE( llarp::bits::count_array_bits(arr) == expected );
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}
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