towlower(3) Library Functions Manual towlower(3)
NAME
towlower, towupper - Convert uppercase and lowercase wide characters
LIBRARY
Standard C Library (libc)
SYNOPSIS
#include <wctype.h>
wint_t towlower ( wint_t wc);
wint_t towupper ( wint_t wc);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
towlower(), towupper(): XSH5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the wide character to convert.
DESCRIPTION
The towlower() function converts the uppercase wide character specified by the wc parameter into the corresponding lowercase wide charac-
ter. The towupper() function converts the lowercase wide character specified by the wc parameter into the corresponding uppercase wide
character. The behavior of the towlower() and towupper() functions are affected by the LC_CTYPE category of the program's locale.
[Tru64 UNIX] In a locale where case conversion information is not defined, these functions determine the case of characters according to
the rules of the C locale.
RETURN VALUES
In the towlower() function, if the wc parameter contains an uppercase wide character that has a corresponding lowercase wide character,
that wide character is returned. Otherwise, the wc parameter is returned unchanged.
In the towupper() function, if the wc parameter contains a lowercase wide character that has a corresponding uppercase wide character, that
wide character is returned. Otherwise, the wc parameter is returned unchanged.
RELATED INFORMATION
Functions: conv(3), setlocale(3), towctrans(3), wctrans(3)
Standards: standards(5) delim off
towlower(3)