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TOWLOWER(3P) POSIX Programmer's Manual TOWLOWER(3P)
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.
towlower, towlower_l — transliterate uppercase wide-character code to
lowercase
#include <wctype.h>
wint_t towlower(wint_t wc);
wint_t towlower_l(wint_t wc, locale_t locale);
For towlower(): 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 towlower() and towlower_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 towlower() or towlower_l() represents
an uppercase wide-character code, and there exists a corresponding
lowercase 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 lowercase wide-character code. All other arguments in
the domain are returned unchanged.
The behavior is undefined if the locale argument to towlower_l() is
the special locale object LC_GLOBAL_LOCALE or is not a valid locale
object handle.
Upon successful completion, the towlower() and towlower_l() functions
shall return the lowercase letter corresponding to the argument
passed; otherwise, they shall return the argument unchanged.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
setlocale(3p), uselocale(3p)
The Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale,
locale.h(0p), wctype.h(0p)
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 .
IEEE/The Open Group 2013 TOWLOWER(3P)
Pages that refer to this page: wchar.h(0p), wctype.h(0p), setlocale(3p), towctrans(3p)