Tribblix: manual page: inttypes.h.3head

INTTYPES.H(3HEAD) Headers INTTYPES.H(3HEAD)

NAME

inttypes.h, inttypes - fixed size integer types

SYNOPSIS

#include <inttypes.h>

DESCRIPTION

The <inttypes.h> header includes the <stdint.h> header.

The <inttypes.h> header includes a definition of the following type:

imaxdiv_t
structure type that is the type of the value returned by
the imaxdiv() function.

The following macros are defined. Each expands to a character string
literal containing a conversion specifier, possibly modified by a
length modifier, suitable for use within the format argument of a
formatted input/output function when converting the corresponding
integer type. These macros have the general form of PRI (character
string literals for the fprintf() and fwprintf() family of functions)
or SCN (character string literals for the fscanf() and fwscanf()
family of functions), followed by the conversion specifier, followed
by a name corresponding to a similar type name in <stdint.h>. In
these names, N represents the width of the type as described in
<stdint.h>. For example, PRIdFAST32 can be used in a format string to
print the value of an integer of type int_fast32_t.

The fprintf() macros for signed integers are:

PRIdN PRIdLEASTN PRIdFASTN PRIdMAX PRIdPTR
PRIiN PRIiLEASTN PRIiFASTN PRIiMAX PRIiPTR

The fprintf() macros for unsigned integers are:

PRIoN PRIoLEASTN PRIoFASTN PRIoMAX PRIoPTR
PRIuN PRIuLEASTN PRIuFASTN PRIuMAX PRIuPTR
PRIxN PRIxLEASTN PRIxFASTN PRIxMAX PRIxPTR
PRIXN PRIXLEASTN PRIXFASTN PRIXMAX PRIXPTR

The fscanf() macros for signed integers are:

SCNdN SCNdLEASTN SCNdFASTN SCNdMAX SCNdPTR
SCNiN SCNiLEASTN SCNiFASTN SCNiMAX SCNiPTR

The fscanf() macros for unsigned integers are:

SCNoN SCNoLEASTN SCNoFASTN SCNoMAX SCNoPTR
SCNuN SCNuLEASTN SCNuFASTN SCNuMAX SCNuPTR
SCNxN SCNxLEASTN SCNxFASTN SCNxMAX SCNxPTR

For each type that the implementation provides in <stdint.h>, the
corresponding fprintf() and fwprintf() macros must be defined. The
corresponding fscanf() and fwscanf() macros must be defined as well,
unless the implementation does not have a suitable modifier for the
type.

USAGE

The purpose of <inttypes.h> is to provide a set of integer types
whose definitions are consistent across machines and independent of
operating systems and other implementation idiosyncrasies. It
defines, with a typedef, integer types of various sizes.
Implementations are free to typedef them as ISO C standard integer
types or extensions that they support. Consistent use of this header
greatly increases the portability of applications across platforms.

EXAMPLES

Example 1: Use of Macro

The following code uses one of the macros available through
<inttypes.h>.

#include <inttypes.h>
#include <wchar.h>
int main(void)
{
uintmax_t i = UINTMAX_MAX; // This type always exists.
wprintf("The largest integer value is %020"
PRIxMAX, "\n", i);
return 0;
}

ATTRIBUTES