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56 lines
876 B
56 lines
876 B
#pragma once
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#include "gp/containers/array.hpp"
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#include <bit>
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#include <stddef.h>
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#include <stdint.h>
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namespace gp {
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using endian = std::endian;
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template <typename T>
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T swap_endian(T value) {
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union {
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T v;
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uint8_t u8[sizeof(T)];
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} src, dest;
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src.v = value;
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for (size_t idx = 0;idx<sizeof(T);idx++) {
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dest.u8[idx] = src.u8[sizeof(T)-idx-1];
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}
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return dest.v;
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}
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template<typename T, endian mode = endian::big>
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struct endian_wrapper {
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union {
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T value;
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gp::array<uint8_t, sizeof(T)> bytes;
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};
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endian_wrapper() {}
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endian_wrapper(T v)
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: value{mode == endian::native ? v : swap_endian(v)} {}
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endian_wrapper(endian_wrapper& v)
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: value{v.value} {}
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endian_wrapper& operator=(T p) {
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value = mode == endian::native ? p : swap_endian(p);
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return *this;
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}
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operator T() {
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return mode == endian::native ? value : swap_endian(value);
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}
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};
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}
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