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towupper(3p) [posix man page]

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

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing 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 require- ments 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-char- acter 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 Technol- ogy -- 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 Stan- dard 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(3P)

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

NAME
towupper, towupper_l - convert a wide character to uppercase 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 toupper(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 conversion based on the character type information in the locale speci- fied 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 character 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. VERSIONS
The towupper_l() function first appeared in glibc 2.3. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-------------+---------------+----------------+ |Interface | Attribute | Value | +-------------+---------------+----------------+ |towupper() | Thread safety | MT-Safe locale | +-------------+---------------+----------------+ |towupper_l() | Thread safety | MT-Safe | +-------------+---------------+----------------+ 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. These functions are not very appropriate for dealing with Unicode characters, because Unicode knows about three cases: upper, lower and title case. SEE ALSO
iswupper(3), towctrans(3), towlower(3), locale(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 TOWUPPER(3)

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