if your unicode string is encoded in UTF8 and your C shared library also accept
UTF8 encoded, then it is safe to export nim string to cstring. the Nim compiler
will automatically handle the conversion. actually, no conversion take place,
only pointer passing.
if it is not UTF8 encoded, or the C library cannot accept UTF8, you can do some
conversion and pass the pointer of your unicode string to C.
#assume both of this function deals with UTF8 encoded string
proc get_c_unicode(): cstring {.importc: bla bla bla.}
proc put_c_unicode(x: cstring): cint {.importc: bla bla bla.}
var nim_unicode_string = $get_c_unicode()
#do something with unicode module
if put_c_unicode(nim_unicode_string) != 0.cint:
echo "ok"
as simple as that, if both party agree to use UTF8
unicode codepoints it self it not too hard to program, but rendering and
formatting the unicode font/typeface, that is the real nightmare.
