NAME

towupper towupper_l — transliterate lowercase wide-character code to uppercase

SYNOPSIS

#include <wctype.h>

wint_t towupper(wint_t wc);
[CX] wint_t towupper_l(wint_t wc, locale_t locale);

DESCRIPTION

For towupper (): [CX] 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 () [CX] 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 () [CX] 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 locale of the process [CX] 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.

RETURN VALUE

Upon successful completion, the towupper () [CX] and towupper_l () functions shall return the uppercase letter corresponding to the argument passed. Otherwise, they shall return the argument unchanged.

ERRORS

The towupper_l () function may fail if:

[EINVAL]

[CX] locale is not a valid locale object handle.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

setlocale(3) , uselocale(3)

XBD V1_chap07(7) , <locale.h> , <wctype.h>

CHANGE HISTORY

First released in Issue 4.

Issue 5

The following change has been made in this version for alignment with ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”) (E):

• The SYNOPSIS has been changed to indicate that this function and associated data types are now made visible by inclusion of the <wctype.h> header rather than <wchar.h>.

Issue 6

The normative text is updated to avoid use of the term "must" for application requirements.

Issue 7

The towupper_l () function is added from The Open Group Technical Standard, 2006, Extended API Set Part 4.

End of informative text.