59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#include <iostream>
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#include <misc/endianness.h>
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#include <cassert>
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union TypeBuffer {
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char buf[8];
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union {
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char n8_pad[7];
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uint8_t un8;
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};
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union {
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char n16_pad[6];
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uint16_t un16;
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};
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union {
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char n32_pad[4];
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uint32_t un32;
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};
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union {
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uint64_t un64;
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};
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};
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#define _T(size, n, rn) \
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le2be ##size(0x ##n, buffer.buf); \
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assert(buffer.un ##size == 0x ##rn); \
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assert(be2le ##size(buffer.buf) == 0x ##n)
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#define T8(_1) _T(8, _1, _1)
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#define T16(_1, _2) _T(16, _1 ##_2, _2 ##_1)
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#define T32(_1, _2, _3, _4) _T(32, _1 ##_2 ##_3 ##_4, _4 ##_3 ##_2 ##_1)
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#define T64(_1, _2, _3, _4, _5, _6, _7, _8) _T(64, _1 ##_2 ##_3 ##_4 ##_5 ##_6 ##_7 ##_8, _8 ##_7 ##_6 ##_5 ##_4 ##_3 ##_2 ##_1)
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int main() {
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TypeBuffer buffer{};
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static_assert(sizeof(buffer) == 8, "");
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T8(FF);
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T8(00);
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T8(AF);
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T8(7F);
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T16(FF, 00);
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T16(00, FF);
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T16(7F, 8F);
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T16(23, CA);
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T32(FF, FF, FF, FF);
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T32(FF, FF, 00, FF);
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T32(F0, FF, 00, 0F);
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T32(F0, CF, 00, 0F);
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T64(FF, FF, FF, FF, FF, FF, FF, FF);
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T64(FF, 00, 00, 00, 00, 00, 00, 00);
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T64(FF, FF, 00, FF, 00, 00, 00, 00);
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T64(F0, FF, 00, 0F, AF, BF, 0F, CF);
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T64(F0, CF, 00, 0F, A2, 00, 03, 22);
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} |