J902 does not NULL terminate strings in C interface

[tingtron]

One issue is at #235 in jinter.py

• either append NULL

  string_encode3('tmpstr_jinter_ =: ({.a.),~jpath \'~user\''))

• or somehow dereference JShap and pass it as second parameter (size) to string_at, which I couldn't figure out.

Reproduce / Test

load'plot'
plot ? 10$0

Error because adCata is extraneous part from non-null terminated string.

JKernel: Internal Error.
[Errno 2] No such file or directory: 'c:\\tools\\j902-useradCata\\temp\\plot.html'

Background

• https://code.jsoftware.com/wiki/Guides/DLLs/Calling_DLLs#J807_Incompatibilities

Current J maintainers don't care about breaking existing C interfaces.

• https://github.com/jsoftware/jsource/issues/17

[martin-saurer]

Fixed in latest release. Using shape to get string size.