I am playing with a new library and for kicks thought I would call its get-version function:

| buffer |
buffer := String new:80.
PLplotLibrary default cPlgver:buffer.
buffer.

The above appears to do nothing; the buffer remains blank, and there is no error raised from it. �I tried something more complicated involving external address and #alloc: and got the version number. �That is encouraging from a perspective of talking to the library, but then I had to square the above failure with my use of memcpy() not long ago (different topic). �In that case, I had real need to allocate a buffer in a fixed heap, but was told that I could ultimately copy from said buffer (which lives across multiple gcs and would move) into a ByteArray of the needed size, which would not move during the memcpy() call. �That worked. �So I tried

| buffer |
buffer := ByteArray new:80.
PLplotLibrary default cPlgver:buffer.
buffer asString.

and get the version number. �What's up? �Why is it ok to pass a byte array but not a string? �If there really is a difference, there should be an exception hinting that something is wrong and what it might be - right?

Bill



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