Standard library header <limits.h>

 

C

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Technical Specifications

Symbol index

 

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 type support library, in particular it's part of the C numeric limits interface.

Limits of core language integer types
BOOL_WIDTH (C23)	bit width of _Bool (macro constant)
BOOL_MAX (C29)	maximum value of _Bool (macro constant)
CHAR_BIT	bit width of byte (macro constant)
MB_LEN_MAX	maximum number of bytes in a multibyte character (macro constant)
CHAR_WIDTH (C23)	bit width of char, same as CHAR_BIT (macro constant)
CHAR_MIN	minimum value of char (macro constant)
CHAR_MAX	maximum value of char (macro constant)
SCHAR_WIDTHSHRT_WIDTHINT_WIDTHLONG_WIDTHLLONG_WIDTH (C23)(C23)(C23)(C23)(C23)	bit width of signed char, short, int, long, and long long respectively (macro constant)
SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN (C99)	minimum value of signed char, short, int, long and long long respectively (macro constant)
SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX (C99)	maximum value of signed char, short, int, long and long long respectively (macro constant)
UCHAR_WIDTHUSHRT_WIDTHUINT_WIDTHULONG_WIDTHULLONG_WIDTH (C23)(C23)(C23)(C23)(C23)	bit width of unsigned char, unsigned short, unsigned int, unsigned long, and unsigned long long respectively (macro constant)
UCHAR_MAXUSHRT_MAXUINT_MAXULONG_MAXULLONG_MAX (C99)	maximum value of unsigned char, unsigned short, unsigned int, unsigned long and unsigned long long respectively (macro constant)
BITINT_MAXWIDTH (C23)	maximum width N supported by the declaration of a bit-precise integer in the type specifier _BitInt(N), greater than or equal to ULLONG_WIDTH (macro constant)

Synopsis

#define __STDC_VERSION_LIMITS_H__ 202311L
 
#define BITINT_MAXWIDTH  /* see description */
#define BOOL_MAX         /* see description */
#define BOOL_WIDTH       /* see description */
#define CHAR_BIT         /* see description */
#define CHAR_MAX         /* see description */
#define CHAR_MIN         /* see description */
#define CHAR_WIDTH       /* see description */
#define INT_MAX          /* see description */
#define INT_MIN          /* see description */
#define INT_WIDTH        /* see description */
#define LLONG_MAX        /* see description */
#define LLONG_MIN        /* see description */
#define LLONG_WIDTH      /* see description */
#define LONG_MAX         /* see description */
#define LONG_MIN         /* see description */
#define LONG_WIDTH       /* see description */
#define MB_LEN_MAX       /* see description */
#define SCHAR_MAX        /* see description */
#define SCHAR_MIN        /* see description */
#define SCHAR_WIDTH      /* see description */
#define SHRT_MAX         /* see description */
#define SHRT_MIN         /* see description */
#define SHRT_WIDTH       /* see description */
#define UCHAR_MAX        /* see description */
#define UCHAR_WIDTH      /* see description */
#define UINT_MAX         /* see description */
#define UINT_WIDTH       /* see description */
#define ULLONG_MAX       /* see description */
#define ULLONG_WIDTH     /* see description */
#define ULONG_MAX        /* see description */
#define ULONG_WIDTH      /* see description */
#define USHRT_MAX        /* see description */
#define USHRT_WIDTH      /* see description */