INTTYPES(3) BSD Library Functions Manual INTTYPES(3)NAMEinttypes — standard fixed-size integer types
SYNOPSIS
#include <inttypes.h>
DESCRIPTION
The <inttypes.h> header describes a set of format specifier macros aimed
to increase portability both within and across operating systems. It
includes the <stdint.h> header and extends it with additional facilities.
Each of the following macros expand to a character string literal con‐
taining the format specifier suitable for use within the format argument
of a formatted I/O function such as printf(3). Each macro contains an
identifier (PRI or SCN), a conversion specifier, and a possible length
modifier.
The length modifier follows the integer types described in stdint(3):
int8_t uint8_t
int16_t uint16_t
int32_t uint32_t
int64_t uint64_t
int_least8_t uint_least8_t
int_least16_t uint_least16_t
int_least32_t uint_least32_t
int_least64_t uint_least64_t
int_fast8_t uint_fast8_t
int_fast16_t uint_fast16_t
int_fast32_t uint_fast32_t
int_fast64_t uint_fast64_t
intmax_t uintmax_t
intptr_t uintptr_t
The following format specifiers are defined for the fprintf(3) and
fscanf(3) families, respectively:
PRI?8 SCN?8
PRI?16 SCN?16
PRI?32 SCN?32
PRI?64 SCN?64
PRI?LEAST8 SCN?LEAST8
PRI?LEAST16 SCN?LEAST16
PRI?LEAST32 SCN?LEAST32
PRI?LEAST64 SCN?LEAST64
PRI?FAST8 SCN?FAST8
PRI?FAST16 SCN?FAST16
PRI?FAST32 SCN?FAST32
PRI?FAST64 SCN?FAST64
PRI?MAX SCN?MAX
PRI?PTR SCN?PTR
The available conversion specifiers, “?” in above, are d and i for signed
integers and o, u, x, and X for unsigned integers. The X is not avail‐
able for the fscanf(3) family. Without the length modifier these would
correspond with %d, %i, %o, %u, %x, and %X, respectively.
EXAMPLES
The following example demonstrates typical usage:
uint64_t i = 123;
...
(void)printf("i = %"PRIu64"\n", i);
SEE ALSOprintf(3), scanf(3), stdint(3)STANDARDS
The <inttypes.h> header conforms to ISO/IEC 9899:1999 (“ISO C99”) and
IEEE Std 1003.1-2001 (“POSIX.1”).
HISTORY
The <inttypes.h> header was first introduced in NetBSD 1.6.
BSD March 21, 2010 BSD
