Case conversion for wide characters
Because a wide character has a fixed size, the ifx_gl_towlower() and ifx_gl_towupper() functions require only one argument: the wide character to convert.
These functions return an integer value of the case-equivalent
character for this wide character. Therefore, you can always perform
case conversion of wide characters in place. For example, you can
assign the case equivalent of src_wc back to src_wc,
as follows:
src_wc = ifx_gl_towupper(src_wc);
You can also perform case conversion of wide characters to a destination
buffer. The previous line could also be written as follows:
dst_wc = ifx_gl_towupper(src_wc);