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Overview

This is an example of calling a C shared library from Go and vice-versa. The J interpreter shared library connects to a front-end through user supplied callbacks. This Go program calls the J shared library functions to initialize the interpreter, then starts a repl. The J interpreter passes the output to the Go function GoOutput which prints it to the console. The J shared library and headers files are read from the present directory.

  • c.go Contains exported Go functions that can be called from C. This is in a separate file because exported Go functions cannot be defined in files with C definitions in the preamble.

  • main.go Contains the repl and C calls to initialize the interpreter.

  • libj.so The J shared library

  • include/ Required J header files

Running

go run c.go main.go

Example Sesion

go run c.go main.go

> %. ? 5 5 $ 0
_0.391485   1.53743   0.310594  0.62827    _1.181
_0.721259 0.0468615    1.53972 _3.30281   3.05491
   1.7293  _1.65349   _1.46677 _1.14991   1.91428
 0.872482 _0.536556 _0.0481831  2.71585   _2.9795
  _1.6354   1.44829   0.631947  1.65261 _0.922678