STRTOIMAX(3P) POSIX Programmer's Manual STRTOIMAX(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAME
strtoimax, strtoumax — convert string to integer type
SYNOPSIS
#include <inttypes.h>
intmax_t strtoimax(const char *restrict nptr, char **restrict endptr,
int base);
uintmax_t strtoumax(const char *restrict nptr, char **restrict endptr,
int base);
DESCRIPTION
The functionality described on this reference page is aligned with the
ISO C standard. Any conflict between the requirements described here
and the ISO C standard is unintentional. This volume of POSIX.1‐2008
defers to the ISO C standard.
These functions shall be equivalent to the strtol(), strtoll(), str‐
toul(), and strtoull() functions, except that the initial portion of
the string shall be converted to intmax_t and uintmax_t representation,
respectively.
RETURN VALUE
These functions shall return the converted value, if any.
If no conversion could be performed, zero shall be returned and errno
may be set to [EINVAL].
If the value of base is not supported, 0 shall be returned and errno
shall be set to [EINVAL].
If the correct value is outside the range of representable values,
{INTMAX_MAX}, {INTMAX_MIN}, or {UINTMAX_MAX} shall be returned (accord‐
ing to the return type and sign of the value, if any), and errno shall
be set to [ERANGE].
ERRORS
These functions shall fail if:
EINVAL The value of base is not supported.
ERANGE The value to be returned is not representable.
These functions may fail if:
EINVAL No conversion could be performed.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
Since the value of *endptr is unspecified if the value of base is not
supported, applications should either ensure that base has a supported
value (0 or between 2 and 36) before the call, or check for an [EINVAL]
error before examining *endptr.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOstrtol(), strtoul()
The Base Definitions volume of POSIX.1‐2008, <inttypes.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 STRTOIMAX(3P)
