NAME

towlower, towupper — wide character case letter conversion utilities

LIBRARY

Standard C Library (libc, -lc)

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

tolower(3), toupper(3)

STANDARDS

The functions conform to ISO/IEC 9899:1999 (“ISO C99”).