Embedding Zenroom

Zenroom is designed to facilitate embedding into other native applications and high-level scripting languages. The stable releases distribute compiled library components for Apple/iOS and Google/Android platforms, as well MS/Windows DLL. Golang bindings and a Jupyter kernel are also in experimental phase.

To call Zenroom from an host program is very simple, since there isn't an API of calls, but a single call to execute scripts and return their results. The call is called zenroom_exec and prints results to the "stderr/stdout" terminal output. Its prototype is common to all libraries:

int zenroom_exec(char *script, char *conf, char *keys,
                 char *data, int verbosity);

The input buffers are all read-only, here their functions: - script: a long string containing the script to be executed - conf: a short configuration string (for now only umm supported as value) - keys: a string often JSON formatted that contains keys (sensitive information) - data: a string (also JSON formatted) that contains data - verbosity: a number from 1 to 3 activating more debugging messages

In addition to this function there is another one that copies results (error messages and printed output) inside memory buffers:

int zenroom_exec_tobuf(char *script, char *conf, char *keys,
                       char *data, int verbosity,
                       char *stdout_buf, size_t stdout_len,
                       char *stderr_buf, size_t stderr_len);

In addition to the previously explained arguments, the new ones are: - stdout_buf: pre-allocated buffer by the caller where to copy stdout - stdout_len: maximum length of the pre-allocated stdout buffer - stderr_buf: pre-allocated buffer by the called where to copy stderr - stderr_len: maximum length of the pre-allocated stderr buffer

At last a third call is provided not to execute the script, but to obtain its JSON formatted Abstract Syntax Tree (AST) inside a provided buffer:

int zenroom_parse_ast(char *script, int verbosity,
                      char *stdout_buf, size_t stdout_len,
                      char *stderr_buf, size_t stderr_len);

Language bindings

-This API can be called in similar ways from a variety of languages and wrappers that already facilitate its usage.

Javascript

Javascript NPM package

๐Ÿ’พ Installation

npm install zenroom

๐ŸŽฎ Quick Usage

import zenroom from 'zenroom'

const script = `print("Hello World!")`
zenroom.script(script).zenroom_exec()

// prints in the console.log "Hello World!"

Python

Python language bindings

๐Ÿ’พ Installation

pip install zenroom

๐ŸŽฎ Quick Usage

from zenroom import zenroom

script = "print('Hello world!')"
result = zenroom.zenroom_exec(script)
print(result.stdout) # guess what

Golang

Go language bindings

๐Ÿ’พ Installation

import "github.com/DECODEproject/Zenroom/bindings/golang/zenroom"

๐ŸŽฎ Quick Usage

script := []byte(`print("Hello World!")`)
res, _ := zenroom.Exec(script)
fmt.Println(string(res))