intptr_t(3type) - Linux manual page (original) (raw)

intptrt(3type) intptrt(3type)

NAME top

   intptr_t, uintptr_t - integer types wide enough to hold pointers

LIBRARY top

   Standard C library (_libc_)

SYNOPSIS top

   **#include <stdint.h>**

   **typedef** /* ... */ **intptr_t;**
   **typedef** /* ... */ **uintptr_t;**

   **#define INTPTR_WIDTH** /* ... */
   **#define UINTPTR_WIDTH INTPTR_WIDTH**

   **#define INTPTR_MAX** /*  2**(INTPTR_WIDTH - 1) - 1  */
   **#define INTPTR_MIN** /*  - 2**(INTPTR_WIDTH - 1)    */
   **#define UINTPTR_MAX** /*  2**UINTPTR_WIDTH - 1       */

DESCRIPTION top

   _intptrt_ is a signed integer type such that any valid (_void *_)
   value can be converted to this type and then converted back.  It
   is capable of storing values in the range [**INTPTR_MIN**,
   **INTPTR_MAX**].

   _uintptrt_ is an unsigned integer type such that any valid (_void *_)
   value can be converted to this type and then converted back.  It
   is capable of storing values in the range [**0**, **INTPTR_MAX**].

   The macros [**U**]**INTPTR_WIDTH** expand to the width in bits of these
   types.

   The macros [**U**]**INTPTR_MAX** expand to the maximum value that these
   types can hold.

   The macro **INTPTR_MIN** expands to the minimum value that _intptrt_
   can hold.

   The length modifiers for the [_u_]_intptrt_ types for the [printf(3)](../man3/printf.3.html)
   family of functions are expanded by the macros **PRIdPTR**, **PRIiPTR**,
   and **PRIuPTR** (defined in _<inttypes.h>_); resulting commonly in
   **%"PRIdPTR"** or **%"PRIiPTR"** for printing _intptrt_ values.  The length
   modifiers for the _[_u_]_intptr_t types for the [scanf(3)](../man3/scanf.3.html) family of
   functions are expanded by the macros **SCNdPTR**, **SCNiPTR**, and **SCNuPTR**
   (defined in _<inttypes.h>_); resulting commonly in **%"SCNuPTR"** for
   scanning _uintptrt_ values.

STANDARDS top

   C11, POSIX.1-2008.

HISTORY top

   C99, POSIX.1-2001.

NOTES top

   The following header also provides these types: _<inttypes.h>_.

SEE ALSO top

   [intmax_t(3type)](../man3/intmax%5Ft.3type.html), **void**(3)

COLOPHON top

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Linux man-pages 6.10 2024-05-02 intptrt(3type)

Pages that refer to this page:intmax_t(3type), intN_t(3type), void(3type)