Nearly all functions in libc (/usr/lib/libc.so) are CSI-enabled. However, the following functions in libc are not CSI-enabled and therefore are EUC-dependent functions:
csetcol()
csetlen()
csetno()
euccol()
euclen()
eucscol()
getwidth()
wcsetno()
In the current Oracle Solaris environment, libgen /usr/ccs/lib/libgen.a and libcurses /usr/ccs/lib/libcurses.a are internationalized but not CSI-enabled.