path: root/src/embind/embind.js

/*global Module*/
/*global _malloc, _free, _memcpy*/
/*global FUNCTION_TABLE, HEAP32, HEAPU8*/
/*global Pointer_stringify*/
/*global __emval_register, _emval_handle_array, __emval_decref*/
/*global ___getDynamicPointerType: false*/
/*global ___typeName:false*/
/*global ___staticPointerCast: false*/

var BindingError = Module.BindingError = extendError(Error, 'BindingError');
var CastError = Module.CastError = extendError(BindingError, 'CastError');

function throwBindingError(value) {
    throw new BindingError(value);
}

function exposePublicSymbol(name, value) {
    if (Module.hasOwnProperty(name)) {
        throwBindingError("Cannot register public name '" + name + "' twice");
    }
    Module[name] = value;
}

// from https://github.com/imvu/imvujs/blob/master/src/error.js
function extendError(baseErrorType, errorName) {
    var errorClass = createNamedFunction(errorName, function(message) {
        this.name = errorName;
        this.message = message;

        var stack = (new Error(message)).stack;
        if (stack !== undefined) {
            this.stack = this.toString() + '\n' +
                stack.replace(/^Error(:[^\n]*)?\n/, '');
        }
    });
    errorClass.prototype = Object.create(baseErrorType.prototype);
    errorClass.prototype.constructor = errorClass;
    errorClass.prototype.toString = function() {
        if (this.message === undefined) {
            return this.name;
        } else {
            return this.name + ': ' + this.message;
        }
    };

    return errorClass;
}


// from https://github.com/imvu/imvujs/blob/master/src/function.js
function createNamedFunction(name, body) {
    /*jshint evil:true*/
    return new Function(
        "body",
        "return function " + name + "() {\n" +
        "    return body.apply(this, arguments);\n" +
        "};\n"
    )(body);
}

function _embind_repr(v) {
    var t = typeof v;
    if (t === 'object' || t === 'array' || t === 'function') {
        return v.toString();
    } else {
        return '' + v;
    }
}

var baseClasses = {}; // rawType -> rawBaseType

// typeID -> { toWireType: ..., fromWireType: ... }
var registeredTypes = {};

// typeID -> [callback]
var awaitingDependencies = {};

function registerType(rawType, registeredInstance) {
    var name = registeredInstance.name;
    if (!rawType) {
        throwBindingError('type "' + name + '" must have a positive integer typeid pointer');
    }
    if (registeredTypes.hasOwnProperty(rawType)) {
        throwBindingError("Cannot register type '" + name + "' twice");
    }

    registeredTypes[rawType] = registeredInstance;

    if (awaitingDependencies.hasOwnProperty(rawType)) {
        var callbacks = awaitingDependencies[rawType];
        delete awaitingDependencies[rawType];
        callbacks.forEach(function(cb) {
            cb();
        });
    }
}

function whenDependentTypesAreResolved(dependentTypes, onComplete) {
    var typeConverters = new Array(dependentTypes.length);
    var unregisteredTypes = [];
    var registered = 0;
    dependentTypes.forEach(function(dt, i) {
        if (registeredTypes.hasOwnProperty(dt)) {
            typeConverters[i] = registeredTypes[dt];
        } else {
            unregisteredTypes.push(dt);
            if (!awaitingDependencies.hasOwnProperty(dt)) {
                awaitingDependencies[dt] = [];
            }
            awaitingDependencies[dt].push(function() {
                typeConverters[i] = registeredTypes[dt];
                ++registered;
                if (registered ==