Standard library header <stdbit.h> (C23)

 

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Standard Library headers

<assert.h> <complex.h> (C99) <ctype.h> <errno.h> <fenv.h> (C99) <float.h> <inttypes.h> (C99)     <iso646.h> (C95) <limits.h> <locale.h> <math.h>

<setjmp.h> <signal.h> <stdalign.h> (C11*) <stdarg.h> <stdatomic.h> (C11)     <stdbit.h> (C23) <stdbool.h> (C99*) <stdckdint.h> (C23) <stddef.h> <stdint.h> (C99) <stdio.h>

<stdlib.h> <stdmchar.h> (C29) <stdnoreturn.h> (C11*) <string.h> <tgmath.h> (C99) <threads.h> (C11) <time.h> <uchar.h> (C11) <wchar.h> (C95) <wctype.h> (C95)

 

This header is part of the numeric library, in particular, it provides macros and functions to work with the byte ordering and byte and bit representation of C objects.

Functions
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
__STDC_ENDIAN_LITTLE____STDC_ENDIAN_BIG__ __STDC_ENDIAN_NATIVE__ (C23)	indicates the endianness of scalar types (macro constant)

Synopsis

#define __STDC_VERSION_STDBIT_H__ 202311L
 
#define __STDC_ENDIAN_LITTLE__ /* implementation-defined */
#define __STDC_ENDIAN_BIG__    /* implementation-defined */
#define __STDC_ENDIAN_NATIVE__ /* implementation-defined */
 
unsigned int stdc_leading_zeros_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_leading_zeros_us(unsigned short value) [[unsequenced]];
unsigned int stdc_leading_zeros_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_leading_zeros_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_leading_zeros_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_leading_zeros(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_leading_ones_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_leading_ones_us(unsigned short value) [[unsequenced]];
unsigned int stdc_leading_ones_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_leading_ones_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_leading_ones_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_leading_ones(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_trailing_zeros_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_trailing_zeros_us(unsigned short value) [[unsequenced]];
unsigned int stdc_trailing_zeros_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_trailing_zeros_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_trailing_zeros_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_trailing_zeros(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_trailing_ones_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_trailing_ones_us(unsigned short value) [[unsequenced]];
unsigned int stdc_trailing_ones_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_trailing_ones_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_trailing_ones_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_trailing_ones(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_first_leading_zero_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_first_leading_zero_us(unsigned short value) [[unsequenced]];
unsigned int stdc_first_leading_zero_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_first_leading_zero_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_first_leading_zero_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_first_leading_zero(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_first_leading_one_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_first_leading_one_us(unsigned short value) [[unsequenced]];
unsigned int stdc_first_leading_one_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_first_leading_one_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_first_leading_one_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_first_leading_one(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_first_trailing_zero_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_first_trailing_zero_us(unsigned short value) [[unsequenced]];
unsigned int stdc_first_trailing_zero_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_first_trailing_zero_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_first_trailing_zero_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_first_trailing_zero(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_first_trailing_one_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_first_trailing_one_us(unsigned short value) [[unsequenced]];
unsigned int stdc_first_trailing_one_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_first_trailing_one_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_first_trailing_one_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_first_trailing_one(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_count_zeros_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_count_zeros_us(unsigned short value) [[unsequenced]];
unsigned int stdc_count_zeros_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_count_zeros_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_count_zeros_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_count_zeros(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_count_ones_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_count_ones_us(unsigned short value) [[unsequenced]];
unsigned int stdc_count_ones_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_count_ones_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_count_ones_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_count_ones(/*generic_value_type*/ value) [[unsequenced]];
bool stdc_has_single_bit_uc(unsigned char value) [[unsequenced]];
bool stdc_has_single_bit_us(unsigned short value) [[unsequenced]];
bool stdc_has_single_bit_ui(unsigned int value) [[unsequenced]];
bool stdc_has_single_bit_ul(unsigned long int value) [[unsequenced]];
bool stdc_has_single_bit_ull(unsigned long long int value) [[unsequenced]];
bool stdc_has_single_bit(/*generic_value_type*/ value) [[unsequenced]];
unsigned int stdc_bit_width_uc(unsigned char value) [[unsequenced]];
unsigned int stdc_bit_width_us(unsigned short value) [[unsequenced]];
unsigned int stdc_bit_width_ui(unsigned int value) [[unsequenced]];
unsigned int stdc_bit_width_ul(unsigned long int value) [[unsequenced]];
unsigned int stdc_bit_width_ull(unsigned long long int value) [[unsequenced]];
/*generic_return_type*/
stdc_bit_width(/*generic_value_type*/ value) [[unsequenced]];
unsigned char stdc_bit_floor_uc(unsigned char value) [[unsequenced]];
unsigned short stdc_bit_floor_us(unsigned short value) [[unsequenced]];
unsigned int stdc_bit_floor_ui(unsigned int value) [[unsequenced]];
unsigned long int stdc_bit_floor_ul(unsigned long int value) [[unsequenced]];
unsigned long long int stdc_bit_floor_ull(unsigned long long int value) [[unsequenced]];
/*generic_value_type*/
stdc_bit_floor(/*generic_value_type*/ value) [[unsequenced]];
unsigned char stdc_bit_ceil_uc(unsigned char value) [[unsequenced]];
unsigned short stdc_bit_ceil_us(unsigned short value) [[unsequenced]];
unsigned int stdc_bit_ceil_ui(unsigned int value) [[unsequenced]];
unsigned long int stdc_bit_ceil_ul(unsigned long int value) [[unsequenced]];
unsigned long long int stdc_bit_ceil_ull(unsigned long long int value) [[unsequenced]];
/*generic_value_type*/
stdc_bit_ceil(/*generic_value_type*/ value) [[unsequenced]];
unsigned char stdc_rotate_left_uc(unsigned char value, unsigned int count);
unsigned short stdc_rotate_left_us(unsigned short value, unsigned int count);
unsigned int stdc_rotate_left_ui(unsigned int value, unsigned int count);
unsigned long stdc_rotate_left_ul(unsigned long value, unsigned int count);
unsigned long long stdc_rotate_left_ull(unsigned long long value, unsigned int count);
/*generic_value_type*/
stdc_rotate_left(/*generic_value_type*/ value, generic_count_type count);
unsigned char stdc_rotate_right_uc(unsigned char value, unsigned int count);
unsigned short stdc_rotate_right_us(unsigned short value, unsigned int count);
unsigned int stdc_rotate_right_ui(unsigned int value, unsigned int count);
unsigned long stdc_rotate_right_ul(unsigned long value, unsigned int count);
unsigned long long stdc_rotate_right_ull(unsigned long long value, unsigned int count);
/*generic_value_type*/
stdc_rotate_right(/*generic_value_type*/ value, generic_count_type count);