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



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.


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.1-2008 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 current locale 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.1-2008, Chapter _7, Locale,
       <locale.h>, <wctype.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
       Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                          TOWUPPER(3)
