77 lines
2.2 KiB
JavaScript
77 lines
2.2 KiB
JavaScript
/*jslint vars: true, plusplus: true, maxerr: 50, indent: 4 */
|
|
|
|
// Basic library functions. This will include a few simple functions,
|
|
// but be augmented with several namespaces for the other libraries in
|
|
// the base library.
|
|
if (!(this.plt)) { this.plt = {}; }
|
|
(function (plt) {
|
|
'use strict';
|
|
var baselib = {};
|
|
plt.baselib = baselib;
|
|
|
|
|
|
|
|
// Simple object inheritance.
|
|
var heir = function (parentPrototype) {
|
|
var F = function () {};
|
|
F.prototype = parentPrototype;
|
|
return new F();
|
|
};
|
|
|
|
|
|
|
|
// clone: object -> object
|
|
// Copies an object. The new object should respond like the old
|
|
// object, including to things like instanceof.
|
|
var clone = function (obj) {
|
|
var property;
|
|
var C = function () {};
|
|
C.prototype = obj;
|
|
var c = new C();
|
|
for (property in obj) {
|
|
if (obj.hasOwnProperty(property)) {
|
|
c[property] = obj[property];
|
|
}
|
|
}
|
|
return c;
|
|
};
|
|
|
|
|
|
// Consumes a class and creates a predicate that recognizes subclasses.
|
|
var makeClassPredicate = function (aClass) {
|
|
return function (x) { return x instanceof aClass; };
|
|
};
|
|
|
|
|
|
|
|
// Helper to deal with the argument-passing of primitives. Call f
|
|
// with arguments bound from MACHINE.env, assuming
|
|
// MACHINE.argcount has been initialized with the number of
|
|
// arguments on the stack. vs provides optional values for the
|
|
// arguments that go beyond those of the mandatoryArgCount.
|
|
var withArguments = function (MACHINE, mandatoryArgCount, vs, f) {
|
|
var args = [], i;
|
|
for (i = 0; i < MACHINE.argcount; i++) {
|
|
if (i < mandatoryArgCount) {
|
|
args.push(MACHINE.env[MACHINE.env.length - 1 - i]);
|
|
} else {
|
|
if (i < MACHINE.argcount) {
|
|
args.push(MACHINE.env[MACHINE.env.length - 1 - i]);
|
|
} else {
|
|
args.push(vs[mandatoryArgCount - i]);
|
|
}
|
|
}
|
|
}
|
|
return f.apply(null, args);
|
|
};
|
|
|
|
|
|
|
|
baselib.heir = heir;
|
|
baselib.clone = clone;
|
|
baselib.makeClassPredicate = makeClassPredicate;
|
|
baselib.withArguments = withArguments;
|
|
|
|
|
|
}(this.plt));
|