towupper

TOWUPPER(3P)                POSIX Programmer's Manual               TOWUPPER(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
       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 .



IEEE/The Open Group                   2017                          TOWUPPER(3P)