NAME
towlower, towupper
— wide-character case letter
conversion utilities
SYNOPSIS
#include
<wctype.h>
wint_t
towlower(wint_t
wc);
wint_t
towupper(wint_t
wc);
DESCRIPTION
The
towlower()
function converts an upper-case wide character to the corresponding
lower-case letter. The
towupper()
function converts an lower-case wide character to the corresponding
upper-case letter.
RETURN VALUES
If the argument is an upper/lower-case letter, the
tolower() function returns the corresponding
counterpart if there is one; otherwise the argument is returned
unchanged.
SEE ALSO
STANDARDS
The functions conform to ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”) and ISO/IEC 9899:1999 (“ISO C99”).