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.1‐2008 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 .