32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
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#ifndef RR_BITFIELD_H
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#define RR_BITFIELD_H
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#include <librr/types.h>
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/// @brief Tests whether a bit of an u64_t at a given index from the least significant bit is set.
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/// @param buffer Buffer of which to test the presence of a bit.
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/// @param index Index of the bit of which to test the presence.
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/// The index starts at 0;0 is the least significant bit.
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/// @return Whether the bit in 'buffer' at 'index' was set.
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inline bool_t rr_is_bit_set(u64_t buffer, usz_t index);
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/// @brief Sets a bit at a given index from the least significant bit in an u64_t and returns the new u64_t.
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/// @param buffer The buffer to set the 'index'th bit of.
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/// @param index Index of the bit in the buffer (as counted from the least significant bit) to set a bit of.
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/// The index starts with 0; there will always be a bit set (except if the index is greater than 63).
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/// @return The modified buffer with the bit set.
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inline u64_t rr_set_bit(u64_t buffer, usz_t index);
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/// @brief Returns a bitfield with a given number of bits set to 1, beginning with the least significant bit.
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/// @param count Number of bits to set
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/// @return The bitfield of which the bits were set.
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u64_t rr_bitpad_lsb(usz_t count);
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/// @brief Returns a bitfield with a given number of bits set to 1, beginning with the most significant bit.
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/// @param count Number of bits to set
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/// @return The bitfield of which the bits were set.
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u64_t rr_bitpad_msb(usz_t count);
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#endif // RR_BITFIELD_H
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