intN_t - Online Linux Manual PageSection : 3type
Updated : 2023-01-31
Source : Linux man-pages 6.03
NAMEintN_t, int8_t, int16_t, int32_t, int64_t, uintN_t, uint8_t, uint16_t, uint32_t, uint64_t − fixed-width basic integer types
LIBRARYStandard C library (libc)
SYNOPSIS#include <stdint.h>typedef /* ... */ int8_t;
typedef /* ... */ int16_t;
typedef /* ... */ int32_t;
typedef /* ... */ int64_t;typedef /* ... */ uint8_t;
typedef /* ... */ uint16_t;
typedef /* ... */ uint32_t;
typedef /* ... */ uint64_t;#define INT8_WIDTH 8"
#define INT16_WIDTH 16"
#define INT32_WIDTH 32"
#define INT64_WIDTH 64"#define UINT8_WIDTH 8"
#define UINT16_WIDTH 16"
#define UINT32_WIDTH 32"
#define UINT64_WIDTH 64"#define INT8_MAX /* 2**(INT8_WIDTH - 1) - 1 */
#define INT16_MAX /* 2**(INT16_WIDTH - 1) - 1 */
#define INT32_MAX /* 2**(INT32_WIDTH - 1) - 1 */
#define INT64_MAX /* 2**(INT64_WIDTH - 1) - 1 */#define INT8_MIN /* - 2**(INT8_WIDTH - 1) */
#define INT16_MIN /* - 2**(INT16_WIDTH - 1) */
#define INT32_MIN /* - 2**(INT32_WIDTH - 1) */
#define INT64_MIN /* - 2**(INT64_WIDTH - 1) */#define UINT8_MAX /* 2**INT8_WIDTH - 1 */
#define UINT16_MAX /* 2**INT16_WIDTH - 1 */
#define UINT32_MAX /* 2**INT32_WIDTH - 1 */
#define UINT64_MAX /* 2**INT64_WIDTH - 1 */#define INT8_C(c) c ## /* ... */
#define INT16_C(c) c ## /* ... */
#define INT32_C(c) c ## /* ... */
#define INT64_C(c) c ## /* ... */#define UINT8_C(c) c ## /* ... */
#define UINT16_C(c) c ## /* ... */
#define UINT32_C(c) c ## /* ... */
#define UINT64_C(c) c ## /* ... */
DESCRIPTIONintN_t are signed integer types of a fixed width of exactly N bits, N being the value specified in its type name. They are be capable of storing values in the range [INTN_MIN, INTN_MAX], substituting N by the appropriate number. uintN_t are unsigned integer types of a fixed width of exactly N bits, N being the value specified in its type name. They are capable of storing values in the range [0, UINTN_MAX], substituting N by the appropriate number. According to POSIX, [u]int8_t, [u]int16_t, and [u]int32_t are required; [u]int64_t are only required in implementations that provide integer types with width 64; and all other types of this form are optional. The macros [U]INTN_WIDTH expand to the width in bits of these types (N). The macros [U]INTN_MAX expand to the maximum value that these types can hold. The macros INTN_MIN expand to the minimum value that these types can hold. The macros [U]INTN_C() expand their argument to an integer constant of type [u]intN_t. The length modifiers for the [u]intN_t types for the printf(3) family of functions are expanded by macros of the forms PRIdN, PRIiN, PRIuN, and PRIxN (defined in <inttypes.h>); resulting for example in %"PRId64" or %"PRIi64" for printing int64_t values. The length modifiers for the [u]intN_t types for the scanf(3) family of functions are expanded by macros of the forms SCNdN, SCNiN, SCNuN, and SCNxN, (defined in <inttypes.h>); resulting for example in %"SCNu8" or %"SCNx8" for scanning uint8_t values.
STANDARDSC99 and later; POSIX.1-2001 and later.
NOTESThe following header also provides these types: <inttypes.h>. <arpa/inet.h> also provides uint16_t and uint32_t.
SEE ALSOintmax_t(3type), intptr_t(3type), printf(3) 0
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