.\" Copyright (c) 2020-2022 by Alejandro Colomar <alx@kernel.org>
.\" and Copyright (c) 2020 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\"
.TH intmax_t 3type 2023-10-31 "Linux man-pages 6.7"
.SH NAME
intmax_t, uintmax_t \- greatest-width basic integer types
.SH LIBRARY
Standard C library
.RI ( libc )
.SH SYNOPSIS
.nf
.B #include <stdint.h>
.P
.BR typedef " /* ... */ " intmax_t;
.BR typedef " /* ... */ " uintmax_t;
.P
.BR "#define INTMAX_WIDTH  " "/* ... */"
.B "#define UINTMAX_WIDTH INTMAX_WIDTH"
.P
.BR "#define INTMAX_MAX    " "/*  2**(INTMAX_WIDTH - 1) - 1  */"
.BR "#define INTMAX_MIN    " "/*  - 2**(INTMAX_WIDTH - 1)    */"
.BR "#define UINTMAX_MAX   " "/*  2**UINTMAX_WIDTH - 1       */"
.P
.BI "#define INTMAX_C(" c ) "   c " ## " \fR/* ... */\fP"
.BI "#define UINTMAX_C(" c ) "  c " ## " \fR/* ... */\fP"
.fi
.SH DESCRIPTION
.I intmax_t
is a signed integer type
capable of representing any value of any basic signed integer type
supported by the implementation.
It is capable of storing values in the range
.RB [ INTMAX_MIN ,
.BR INTMAX_MAX ].
.P
.I uintmax_t
is an unsigned integer type
capable of representing any value of any basic unsigned integer type
supported by the implementation.
It is capable of storing values in the range
.RB [ 0 ,
.BR UINTMAX_MAX ].
.P
The macros
.RB [ U ] INTMAX_WIDTH
expand to the width in bits of these types.
.P
The macros
.RB [ U ] INTMAX_MAX
expand to the maximum value that these types can hold.
.P
The macro
.B INTMAX_MIN
expands to the minimum value that
.I intmax_t
can hold.
.P
The macros
.RB [ U ] INTMAX_C ()
expand their argument to an integer constant of type
.RI [ u ] intmax_t .
.P
The length modifier for
.RI [ u ] intmax_t
for the
.BR printf (3)
and the
.BR scanf (3)
families of functions is
.BR j ;
resulting commonly in
.BR %jd ,
.BR %ji ,
.BR %ju ,
or
.B %jx
for printing
.RI [ u ] intmax_t
values.
.SH STANDARDS
C11, POSIX.1-2008.
.SH HISTORY
C99, POSIX.1-2001.
.SH NOTES
The following header also provides these types:
.IR <inttypes.h> .
.SH BUGS
These types may not be as large as extended integer types, such as
.I __int128
.SH SEE ALSO
.BR int64_t (3type),
.BR intptr_t (3type),
.BR printf (3),
.BR strtoimax (3)