js2c

What is js2c

js2c is a command line tool to translate javascript to c code. Sure not all syntax is supported, in fact, only a few is supported, you can treat it as enhanced C instead of really a js to c translator.

WARNING: It's my practice for learning Javascript. If you want use it in any of your project, thanks for interested in this project, but take care of yourself, it's not ready for production, at least by now.

How to use

Install

Install with npm:

npm install -g js2c

Help

js2c help
js2c help toc
js2c help exec

Translate js code to c code

Translate

js2c toc you-in.js out.c

If omit out.c, it will print output c code to stdout.

include file

If external function is used, js2c need their prototype. This is provided as an include file by '-i' option:

js2c toc -i path/to/include.js in.js out.c

Following is an example of include file:

{
    "fun1": {
    "returnType": "int",
    "paramTypes": []
    },
 
    "fun2": {
    "returnType": "char *",
    "paramTypes": []
    },
 
    "httpGet": {
    "returnType": "void",
    "paramTypes": [
        "char *",
        {
        "returnType": "char *",
        "paramTypes": [
            "char *"
        ]
        },
        {
        "returnType": "int",
        "paramTypes": [
            "char *"
        ]
        }
    ]
    }
}

indent

Sorry for the output c file is un-formatted, please use indent before you read it :-).

indent output.c [formatted_output.c]

Run script in js mode (mock)

You can run the js script file as following:

js2c exec path-to-script-file.js

But if it called external functions, you need provide then. With -m option, you can specify a mock file. Following is an example of mock file:

function httpGet(url, success, fail) {
  console.log(">> httpGet");
  success("hello");
}

Supported js syntax

TBD

Todo

TBD

License

MIT