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The undimensioned (array <type>) and (zarray <type>) types are
not doing UTF-8 conversion when <type> is char or zchar,
or doing what they are supposed to with the FFI character
types, which is inconsistent from their dimensioned
counterparts.
* ffi.c (ffi_varray_dynsize): if the element type is marked
for character conversion, then do the size calculation for
char and zchar by measuring the UTF-8 coded size.
(ffi_varray_alloc): Call ffi_varray_dynsize to get the size,
to benefit from the char handling. Thus when FFI allocates
buffers for a variable length array, it will allocate correct
size required for the UTF-8 encoded string.
(ffi_varray_put, ffi_varray_in): Here we must call
ffi_varray_dynsize and divide by the element type to get the
proper numer of elements. Then we must check for character
conversion and handle the cases.
(ffi_varray_null_term_in): Check for character conversion
cases and route those through ffi_varray_in, which handles
null-terminated strings.
* tests/017/ffi-misc.tl: New file.
* tests/017/ffi-misc.expected: New file.
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