TOWUPPER
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
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
towupper,
towupper_l
--- transliterate lowercase wide-character code to uppercase
SYNOPSIS
#include <wctype.h>
wint_t towupper(wint_t wc);
wint_t towupper_l(wint_t wc, locale_t locale);
DESCRIPTION
For
towupper():
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.1-2017 defers to the ISO C standard.
The
towupper()
and
towupper_l()
functions have as a domain a type
wint_t,
the value of which the application shall ensure is a character
representable as a
wchar_t,
and a wide-character code corresponding to a valid character in the
locale used by the function or the value of WEOF.
If the argument has any other value, the behavior is undefined.
If the argument of
towupper()
or
towupper_l()
represents a lowercase wide-character code, and there exists a
corresponding uppercase wide-character code as defined by character
type information in the current locale
or in the locale represented by
locale,
respectively (category
LC_CTYPE),
the result shall be the corresponding uppercase wide-character code.
All other arguments in the domain are returned unchanged.
The behavior is undefined if the
locale
argument to
towupper_l()
is the special locale object LC_GLOBAL_LOCALE or is not a valid locale
object handle.
RETURN VALUE
Upon successful completion, the
towupper()
and
towupper_l()
functions shall return the uppercase letter corresponding to the
argument passed. Otherwise, they shall return the argument unchanged.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
setlocale(),
uselocale()
The Base Definitions volume of POSIX.1-2017,
Chapter 7, Locale,
<locale.h>,
<wctype.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
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.opengroup.org/unix/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.kernel.org/doc/man-pages/reporting_bugs.html .