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Bit manipulation (since C23)

Functions

Defined in header <stdbit.h>
stdc_leading_zeros
(C23)
counts the number of consecutive 0 bits, starting from the most significant bit
(type-generic function macro)
stdc_leading_ones
(C23)
counts the number of consecutive 1 bits, starting from the most significant bit
(type-generic function macro)
stdc_trailing_zeros
(C23)
counts the number of consecutive 0 bits, starting from the least significant bit
(type-generic function macro)
stdc_trailing_ones
(C23)
counts the number of consecutive 1 bits, starting from the least significant bit
(type-generic function macro)
stdc_first_leading_zero
(C23)
finds the first position of 0 bit, starting from the most significant bit
(type-generic function macro)
stdc_first_leading_one
(C23)
finds the first position of 1 bit, starting from the most significant bit
(type-generic function macro)
stdc_first_trailing_zero
(C23)
finds the first position of 0 bit, starting from the least significant bit
(type-generic function macro)
stdc_first_trailing_one
(C23)
finds the first position of 1 bit, starting from the least significant bit
(type-generic function macro)
stdc_count_zeros
(C23)
counts the number of 0 bits in an unsigned integer
(type-generic function macro)
stdc_count_ones
(C23)
counts the number of 1 bits in an unsigned integer
(type-generic function macro)
stdc_has_single_bit
(C23)
checks if a number is an integral power of 2
(type-generic function macro)
stdc_bit_width
(C23)
finds the smallest number of bits needed to represent the given value
(type-generic function macro)
stdc_bit_floor
(C23)
finds the largest integral power of 2 not greater than the given value
(type-generic function macro)
stdc_bit_ceil
(C23)
finds the smallest integral power of 2 not less than the given value
(type-generic function macro)

Macro constants

Defined in header <stdbit.h>
__STDC_ENDIAN_LITTLE____STDC_ENDIAN_BIG__ __STDC_ENDIAN_NATIVE__
(C23)
indicates the endianness of scalar types
(macro constant)

References

  • C23 standard (ISO/IEC 9899:2024):
    • 7.18 Bit and byte utilities <stdbit.h>

See also

C++ documentation for Bit manipulation

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Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/c/numeric/bit_manip

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