msgpack for MooMoo.io, but leightweight and fast
Dette script bør ikke installeres direkte. Det er et bibliotek, som andre scripts kan inkludere med metadirektivet // @require https://update.greasyfork.org/scripts/547088/1648219/Lightweight%20MooMooio%20msgpack.js
/*
* MooMoo Mini MsgPack
* Lightweight MessagePack encoder/decoder for MooMoo.io
*
* Usage:
* const [event, args] = miniMooMsgpack.decode(arrayBuffer);
* ws.send(miniMooMsgpack.encode(["packet", [data]]));
*
* Author: Nuro (notnuro0815)
*/
// moo-mini-pack.js
(function(r) {
function o(b) {
return b instanceof Uint8Array ? b : b instanceof ArrayBuffer ? new Uint8Array(b) : ArrayBuffer.isView(b) ? new Uint8Array(b.buffer, b.byteOffset, b.byteLength) : null
}
const TD = typeof TextDecoder != "undefined" && new TextDecoder("utf-8");
const TE = typeof TextEncoder != "undefined" && new TextEncoder();
function D(buf) {
this.u = o(buf);
if (!this.u) throw TypeError("need ArrayBuffer/Uint8Array");
this.v = new DataView(this.u.buffer, this.u.byteOffset, this.u.byteLength);
this.i = 0
}
D.prototype.b = function() {
return this.u[this.i++]
};
D.prototype.u16 = function() {
const x = this.v.getUint16(this.i);
this.i += 2;
return x
};
D.prototype.u32 = function() {
const x = this.v.getUint32(this.i);
this.i += 4;
return x
};
D.prototype.i8 = function() {
const x = this.v.getInt8(this.i);
this.i += 1;
return x
};
D.prototype.i16 = function() {
const x = this.v.getInt16(this.i);
this.i += 2;
return x
};
D.prototype.i32 = function() {
const x = this.v.getInt32(this.i);
this.i += 4;
return x
};
D.prototype.f64 = function() {
const x = this.v.getFloat64(this.i);
this.i += 8;
return x
};
function strDec(d, n) {
const a = d.u.subarray(d.i, d.i + n);
d.i += n;
return TD ? TD.decode(a) : String.fromCharCode.apply(null, a)
}
function arr(d, n) {
const A = new Array(n);
for (let i = 0; i < n; i++) A[i] = read(d);
return A
}
function read(d) {
const b = d.b();
if (b <= 0x7f) return b;
if ((b & 0xf0) === 0x90) return arr(d, b & 0x0f);
if ((b & 0xe0) === 0xa0) return strDec(d, b & 0x1f);
if ((b & 0xf0) === 0x80) throw Error("map unsupported");
switch (b) {
case 0xc0:
return null;
case 0xc2:
return false;
case 0xc3:
return true;
case 0xcb:
return d.f64();
case 0xcc:
return d.b();
case 0xcd:
return d.u16();
case 0xce:
return d.u32();
case 0xd0:
return d.i8();
case 0xd1:
return d.i16();
case 0xd2:
return d.i32();
case 0xd9:
return strDec(d, d.b());
case 0xda:
return strDec(d, d.u16());
case 0xdc:
return arr(d, d.u16());
case 0xdd:
return arr(d, d.u32());
default:
if (b >= 0xe0) return (b << 24) >> 24;
throw Error("type 0x" + b.toString(16));
}
}
function E(cap) {
cap = cap || 256;
this.b = new Uint8Array(cap);
this.v = new DataView(this.b.buffer);
this.i = 0
}
E.prototype.g = function(n) {
if (this.i + n <= this.b.length) return;
const nb = new Uint8Array(Math.max(this.b.length * 2, this.i + n));
nb.set(this.b);
this.b = nb;
this.v = new DataView(nb.buffer)
};
E.prototype.u8 = function(x) {
this.g(1);
this.b[this.i++] = x
};
E.prototype.u16 = function(x) {
this.g(2);
this.v.setUint16(this.i, x);
this.i += 2
};
E.prototype.u32 = function(x) {
this.g(4);
this.v.setUint32(this.i, x);
this.i += 4
};
E.prototype.i8 = function(x) {
this.g(1);
this.v.setInt8(this.i, x);
this.i += 1
};
E.prototype.i16 = function(x) {
this.g(2);
this.v.setInt16(this.i, x);
this.i += 2
};
E.prototype.i32 = function(x) {
this.g(4);
this.v.setInt32(this.i, x);
this.i += 4
};
E.prototype.f64 = function(x) {
this.g(8);
this.v.setFloat64(this.i, x);
this.i += 8
};
E.prototype.u8a = function(a) {
this.g(a.length);
this.b.set(a, this.i);
this.i += a.length
};
function write(e, x) {
if (x == null) {
e.u8(0xc0);
return
}
const t = typeof x;
if (t === "boolean") {
e.u8(x ? 0xc3 : 0xc2);
return
}
if (t === "number") {
if (Number.isInteger(x) && x >= -2147483648 && x <= 4294967295) {
if (x >= 0) {
if (x < 0x80) {
e.u8(x);
return
}
if (x < 0x100) {
e.u8(0xcc);
e.u8(x);
return
}
if (x < 0x10000) {
e.u8(0xcd);
e.u16(x);
return
}
e.u8(0xce);
e.u32(x);
return
}
if (x >= -32) {
e.u8(0xe0 | (x + 32));
return
}
if (x >= -128) {
e.u8(0xd0);
e.i8(x);
return
}
if (x >= -32768) {
e.u8(0xd1);
e.i16(x);
return
}
e.u8(0xd2);
e.i32(x);
return
}
e.u8(0xcb);
e.f64(x);
return
}
if (t === "string") {
const a = TE ? TE.encode(x) : new Uint8Array(x.split("").map(c => c.charCodeAt(0) & 255));
const n = a.length;
if (n < 32) {
e.u8(0xa0 | n);
e.u8a(a);
return
}
if (n < 0x100) {
e.u8(0xd9);
e.u8(n);
e.u8a(a);
return
}
e.u8(0xda);
e.u16(n);
e.u8a(a);
return
}
if (Array.isArray(x)) {
const n = x.length;
if (n < 16) e.u8(0x90 | n);
else if (n < 0x10000) {
e.u8(0xdc);
e.u16(n)
} else {
e.u8(0xdd);
e.u32(n)
}
for (let i = 0; i < n; i++) write(e, x[i]);
return
}
// maps not needed for MooMoo; add if ever seen
throw Error("unsupported type: " + t)
}
function encode(x) {
const e = new E();
write(e, x);
return e.b.slice(0, e.i)
}
r.miniMooMsgpack = {
decode: (u) => read(new D(u)),
encode
};
})(typeof module == "object" ? module.exports : window);