86 lines
2.9 KiB
JavaScript
86 lines
2.9 KiB
JavaScript
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var StaticByteBufferProto = new dcodeIO.ByteBuffer().__proto__;
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var StaticArrayBufferProto = new ArrayBuffer().__proto__;
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var StaticUint8ArrayProto = new Uint8Array().__proto__;
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function getString(thing) {
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if (thing === Object(thing)) {
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if (thing.__proto__ == StaticUint8ArrayProto)
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return String.fromCharCode.apply(null, thing);
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if (thing.__proto__ == StaticArrayBufferProto)
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return getString(new Uint8Array(thing));
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if (thing.__proto__ == StaticByteBufferProto)
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return thing.toString("binary");
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}
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return thing;
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}
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function getStringable(thing) {
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return (typeof thing == "string" || typeof thing == "number" || typeof thing == "boolean" ||
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(thing === Object(thing) &&
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(thing.__proto__ == StaticArrayBufferProto ||
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thing.__proto__ == StaticUint8ArrayProto ||
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thing.__proto__ == StaticByteBufferProto)));
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}
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function isEqual(a, b, mayBeShort) {
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// TODO: Special-case arraybuffers, etc
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if (a === undefined || b === undefined)
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return false;
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a = getString(a);
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b = getString(b);
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var maxLength = mayBeShort ? Math.min(a.length, b.length) : Math.max(a.length, b.length);
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if (maxLength < 5)
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throw new Error("a/b compare too short");
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return a.substring(0, Math.min(maxLength, a.length)) == b.substring(0, Math.min(maxLength, b.length));
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}
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function toArrayBuffer(thing) {
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//TODO: Optimize this for specific cases
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if (thing === undefined)
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return undefined;
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if (thing === Object(thing) && thing.__proto__ == StaticArrayBufferProto)
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return thing;
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if (thing instanceof Array) {
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// Assuming Uint16Array from curve25519
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var res = new ArrayBuffer(thing.length * 2);
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var uint = new Uint16Array(res);
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for (var i = 0; i < thing.length; i++)
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uint[i] = thing[i];
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return res;
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}
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if (!getStringable(thing))
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throw new Error("Tried to convert a non-stringable thing of type " + typeof thing + " to an array buffer");
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var str = getString(thing);
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var res = new ArrayBuffer(str.length);
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var uint = new Uint8Array(res);
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for (var i = 0; i < str.length; i++)
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uint[i] = str.charCodeAt(i);
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return res;
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}
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function ensureStringed(thing) {
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if (getStringable(thing))
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return getString(thing);
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else if (thing instanceof Array) {
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var res = [];
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for (var i = 0; i < thing.length; i++)
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res[i] = ensureStringed(thing[i]);
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return res;
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} else if (thing === Object(thing)) {
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var res = {};
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for (var key in thing)
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res[key] = ensureStringed(thing[key]);
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return res;
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}
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throw new Error("unsure of how to jsonify object of type " + typeof thing);
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}
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window.textsecure = {
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utils: {
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jsonThing: function(thing) {
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return JSON.stringify(ensureStringed(thing));
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}
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}
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};
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