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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* Copyright (C) 2021,2022 fef <owo@fef.moe>. All rights reserved. */
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#pragma once
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#include <gay/cdefs.h>
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#include <gay/types.h>
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#include <limits.h>
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/**
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* @brief Test whether a bit in a bitfield is set.
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*
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* @param bitfield Bitfield to test a bit of
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* @param pos Index of the bit within the bitfield, counting from 0
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* @return `true` if the bit is set, `false` if not
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*/
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bool bit_tst(const unsigned long *bitfield, usize pos);
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/**
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* @brief Set a single bit in a bitfield.
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*
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* @param bitfield Bitfield to set the bit in
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* @param pos Index of the bit within the bitfield, counting from 0
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*/
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void bit_set(unsigned long *bitfield, usize pos);
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/**
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* @brief Clear a single bit in a bitfield.
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*
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* @param bitfield Bitfield to clear the bit in
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* @param pos Index of the bit within the bitfield, counting from 0
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*/
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void bit_clr(unsigned long *bitfield, usize pos);
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/**
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* @brief Set a range of bits in a bitfield.
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*
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* @param bitfield Bitfield to set bits in
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* @param first Index of the first bit to set in the bitfield, counting from 0
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* @param count Number of bits to set, starting from index `first`
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*/
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void bit_set_range(unsigned long *bitfield, usize first, usize count);
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/**
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* @brief Clear a range of bits in a bitfield.
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*
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* @param bitfield Bitfield to clear bits in
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* @param first Index of the first bit to clear in the bitfield, counting from 0
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* @param count Number of bits to clear, starting from index `first`
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*/
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void bit_clr_range(unsigned long *bitfield, usize first, usize count);
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