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https://github.com/zeldaret/st
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Yanis
29 lines
1.3 KiB
C
29 lines
1.3 KiB
C
#pragma once
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#include "types.h"
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/**
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* Flags value format:
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* - 0x001F: 0000 0000 0001 1111 -> the shift value to read or write the flag's bit
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* - 0xFFE0: 1111 1111 1110 0000 -> index of the value in the array
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*
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* `FLAG` is a macro that allows you to get the final value from the index and the slot number.
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*/
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#define GET_FLAG(arr, pos) (((arr)[((u32) (pos)) >> 5] & (1 << ((pos) & 0x1F))) != 0)
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#define SET_FLAG(arr, pos) ((arr)[((u32) (pos)) >> 5] |= 1 << ((pos) & 0x1F))
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#define UNSET_FLAG(arr, pos) ((arr)[((u32) (pos)) >> 5] &= ~(1 << ((pos) & 0x1F)))
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#define FLAG(index, pos) (((index) << 5) | ((pos) & 0x1F))
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//! TODO: improve or remove? idk
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#define VA_NARGS_IMPL(_1, _2, _3, _4, N, ...) N
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#define VA_NARGS(...) VA_NARGS_IMPL(__VA_ARGS__, 4, 3, 2, 1)
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#define GET_FLAGS_1(f1) (1 << (f1))
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#define GET_FLAGS_2(f1, f2) GET_FLAGS_1(f1) | (1 << (f2))
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#define GET_FLAGS_3(f1, f2, f3) GET_FLAGS_2(f1, f2) | (1 << (f3))
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#define GET_FLAGS_4(f1, f2, f3, f4) GET_FLAGS_3(f1, f2, f3) | (1 << (f4))
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#define GET_FLAGS_IMPL2(N, ...) GET_FLAGS_##N(__VA_ARGS__)
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#define GET_FLAGS_IMPL(N, ...) GET_FLAGS_IMPL2(N, __VA_ARGS__)
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#define GET_FLAGS(...) GET_FLAGS_IMPL(VA_NARGS(__VA_ARGS__), __VA_ARGS__)
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#define SET_FLAGS(arr, ...) (*(arr) = GET_FLAGS_IMPL(VA_NARGS(__VA_ARGS__), __VA_ARGS__))
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