45 lines
2.0 KiB
C++
45 lines
2.0 KiB
C++
#include "test_should_be.hh"
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#include "wrapping_integers.hh"
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#include <cstdint>
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#include <exception>
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#include <iostream>
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#include <stdexcept>
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#include <string>
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using namespace std;
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int main() {
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try {
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// Unwrap the first byte after ISN
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test_should_be(unwrap(WrappingInt32(1), WrappingInt32(0), 0), 1ul);
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// Unwrap the first byte after the first wrap
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test_should_be(unwrap(WrappingInt32(1), WrappingInt32(0), UINT32_MAX), (1ul << 32) + 1);
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// Unwrap the last byte before the third wrap
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test_should_be(unwrap(WrappingInt32(UINT32_MAX - 1), WrappingInt32(0), 3 * (1ul << 32)), 3 * (1ul << 32) - 2);
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// Unwrap the 10th from last byte before the third wrap
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test_should_be(unwrap(WrappingInt32(UINT32_MAX - 10), WrappingInt32(0), 3 * (1ul << 32)), 3 * (1ul << 32) - 11);
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// Non-zero ISN
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test_should_be(unwrap(WrappingInt32(UINT32_MAX), WrappingInt32(10), 3 * (1ul << 32)), 3 * (1ul << 32) - 11);
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// Big unwrap
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test_should_be(unwrap(WrappingInt32(UINT32_MAX), WrappingInt32(0), 0), static_cast<uint64_t>(UINT32_MAX));
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// Unwrap a non-zero ISN
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test_should_be(unwrap(WrappingInt32(16), WrappingInt32(16), 0), 0ul);
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// Big unwrap with non-zero ISN
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test_should_be(unwrap(WrappingInt32(15), WrappingInt32(16), 0), static_cast<uint64_t>(UINT32_MAX));
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// Big unwrap with non-zero ISN
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test_should_be(unwrap(WrappingInt32(0), WrappingInt32(INT32_MAX), 0), static_cast<uint64_t>(INT32_MAX) + 2);
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// Barely big unwrap with non-zero ISN
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test_should_be(unwrap(WrappingInt32(UINT32_MAX), WrappingInt32(INT32_MAX), 0), static_cast<uint64_t>(1) << 31);
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// Nearly big unwrap with non-zero ISN
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test_should_be(unwrap(WrappingInt32(UINT32_MAX), WrappingInt32(1ul << 31), 0),
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static_cast<uint64_t>(UINT32_MAX) >> 1);
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} catch (const exception &e) {
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cerr << e.what() << endl;
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return 1;
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}
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return EXIT_SUCCESS;
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}
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