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    Command:

    towupper

    
    
    

    SYNOPSIS

           #include <wctype.h>
    
           wint_t towupper(wint_t wc);
    
           wint_t towupper_l(wint_t wc, locale_t locale);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           towupper_l():
               Since glibc 2.10:
                      _XOPEN_SOURCE >= 700
               Before glibc 2.10:
                      _GNU_SOURCE
    
    
    

    DESCRIPTION

           The  towupper()  function is the wide-character equivalent of the toup-
           per(3) function.  If wc is a lowercase wide character, and there exists
           an uppercase equivalent in the current locale, it returns the uppercase
           equivalent of wc.  In all other cases, wc is returned unchanged.
    
           The towupper_l() function performs the same task, but performs the con-
           version based on the character type information in the locale specified
           by locale.  The behavior of towupper_l() is undefined if locale is  the
           special  locale  object LC_GLOBAL_LOCALE (see duplocale(3)) or is not a
           valid locale object handle.
    
           The argument wc must be representable as a wchar_t and be a valid char-
           acter in the locale or be the value WEOF.
    
    
    

    RETURN VALUE

           If  wc  was  convertible to uppercase, towupper() returns its uppercase
           equivalent; otherwise it returns wc.
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The towupper() function is thread-safe  with  exceptions.   It  can  be
           safely  used  in multithreaded applications, as long as setlocale(3) is
           not called to change the locale during its execution.
    
    
    

    VERSIONS

           The towupper_l() function first appeared in glibc 2.3.
    
    
    

    CONFORMING TO

           towupper(): C99, POSIX.1-2001 (XSI); present as  an  XSI  extension  in
           POSIX.1-2008, but marked obsolete.
    
           towupper_l(): POSIX.1-2008.
    
    
    

    NOTES

           The behavior of these functions depends on the LC_CTYPE category of the
           locale.
    
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