Arguments checking in native modules for Node.js

This project contains some helper utilities that make native addon development a bit more easier.

• Example
• Usage
• API
• Tests

Example

NAN_METHOD(calibrationPatternDetect)
{
    NanScope();

    Local<Object>   imageBuffer;
    Local<Function> callback;
    cv::Size        patternSize;
    PatternType     pattern;

    try
    {
        if (Nan::Check(info).ArgumentsCount(5)
            .Argument(0).IsBuffer().Bind(imageBuffer)
            .Argument(1).Bind(patternSize.width)
            .Argument(2).Bind(patternSize.height)
            .Argument(3).StringEnum<PatternType>({ 
                { "CHESSBOARD",     PatternType::CHESSBOARD }, 
                { "CIRCLES_GRID",   PatternType::CIRCLES_GRID }, 
                { "ACIRCLES_GRID",  PatternType::ACIRCLES_GRID } }).Bind(pattern)
            .Argument(4).IsFunction().Bind(callback))
        {
            Nan::Callback *nanCallback = new Nan::Callback(callback);
            Nan::AsyncQueueWorker(new DetectPatternTask(imageBuffer, patternSize, pattern, nanCallback));
            Nan::ReturnValue(Nan::True());
        }

        Nan::ReturnValue(Nan::False());
    }
    catch (Nan::CheckException& exc)
    {
        return Nan::ThrowTypeError(exc.what());
    }
}

Usage

Simply add NAN-Check as a dependency in the package.json of your Node addon:

$ npm install --save nan nan-check

Pull in the path to NAN and NAN-Check in your binding.gyp so that you can use #include <nan-check.h> in your .cpp files:

"include_dirs" : [
    "<!(node -e \"require('nan')\")",
    "<!(node -e \"require('nan-check')\")"
]

This works like a -I<path-to-NAN-Check> when compiling your addon.

API

TODO: Write

Tests

To run the NAN-Check tests do:

npm install
npm run-script rebuild-tests
npm test

Or just:

npm install
make test

Licence & copyright

Copyright (c) 2015 Ievgen Khvedchenia.

Native Abstractions for Node.js is licensed under an MIT license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE file for more details.