40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
#pragma once
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#include <common.hpp>
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#include <type_traits>
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#include <cassert>
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namespace natsukashii::util {
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template <typename ...Args>
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constexpr void panic(const std::string& fmt, Args... args) {
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fmt::print(fmt, args...);
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exit(-1);
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}
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template <u8 start, u8 end>
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using BitSliceType =
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typename std::conditional<(end - start) <= 7, u8,
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typename std::conditional<(end - start) <= 15, u16,
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typename std::conditional<(end - start) <= 31, u32,
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typename std::conditional<(end - start) <= 63, u64,
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typename std::conditional<(end - start) <= 127, u128, void>::type
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>::type
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>::type
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>::type
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>::type;
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template <u8 start, u8 end, typename T>
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BitSliceType<start, end> BitSlice(const T& num) {
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static_assert(end < (sizeof(T) * 8) && start < (sizeof(T) * 8));
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constexpr auto correctedEnd = end == (sizeof(T) * 8) - 1 ? end : end + 1;
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return (num >> start) & ((1 << correctedEnd) - 1);
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}
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template <typename T>
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T BitSlice(const T& num, int start, int end) {
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assert(end < (sizeof(T) * 8) && start < (sizeof(T) * 8));
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auto correctedEnd = end == (sizeof(T) * 8) - 1 ? end : end + 1;
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return (num >> start) & ((1 << correctedEnd) - 1);
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}
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}
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