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.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

setlocale , uselocale

XBD Locale , <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 9899:1990/Amendment 1:1995 (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.