Skip to content

Dissolve using Generators. #15

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
arthurschreiber wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Dissolve using Generators. #15

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
1b44dda
Dissolve using Generators.
arthurschreiber Jul 27, 2015
84bd831
Merge branch 'master' into arthur/generators
arthurschreiber Nov 15, 2016
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
103 changes: 64 additions & 39 deletions example-complex.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,58 +1,83 @@
#!/usr/bin/env node
"use strict";

var Dissolve = require("./index"),
util = require("util");

function Parser() {
Dissolve.call(this);

this.loop(function(end) {
this.uint8("pid").tap(function() {
switch (this.vars.pid) {
case 0x00: this.uint32be("token"); break;
case 0x01: this.uint32be("eid").mcstring16("level_type").uint8("game_mode").uint8("dimension").uint8("difficulty").uint8("junk").uint8("max_players"); break;
case 0x02: this.uint8("protocol_version").mcstring16("username").mcstring16("server_host").uint32be("server_port"); break;
case 0x03: this.mcstring16("message"); break;
case 0x04: this.uint64be("time"); break;
case 0xfe: break;
}
}).tap(function() {
this.push(this.vars);
this.vars = {};
});
});
}
util.inherits(Parser, Dissolve);
class Parser extends Dissolve {
*parser() {
var data;
while (true) {
data = {
pid: yield this.uint8()
};

switch (data.pid) {
case 0x00:
data.token = yield this.uint32be();
break;

case 0x01:
data.eid = yield this.uint32be();
data.level_type = yield *this.mcstring16();
data.game_mode = yield this.uint8();
data.dimension = yield this.uint8();
data.difficulty = yield this.uint8();
data.junk = yield this.uint8();
data.max_players = yield this.uint8();
break;

Parser.prototype.mcstring16 = function string16(name) {
var len = [name, "len"].join("_");
case 0x02:
data.protocol_version = yield this.uint8();
data.username = yield *this.mcstring16();
data.server_host = yield *this.mcstring16();
data.server_port = yield this.uint32be();
break;

return this.uint16be(len).tap(function() {
this.buffer(name, this.vars[len] * 2).tap(function() {
delete this.vars[len];
case 0x03:
data.message = yield *this.mcstring16();
break;

for (var i=0;i<this.vars[name].length/2;++i) {
var t = this.vars[name][i*2];
this.vars[name][i*2] = this.vars[name][i*2+1];
this.vars[name][i*2+1] = t;
case 0x04:
data.time = yield this.uint64be();
break;

case 0xfe:
break;
}

this.vars[name] = this.vars[name].toString("ucs2");
});
});
};
this.push(data);
}
}

*mcstring16() {
var length = yield this.uint16be();

var data = yield this.buffer(length * 2);

for (var i = 0; i < (data.length / 2); ++i) {
var t = data[i*2];
data[i*2] = data[i*2+1];
data[i*2+1] = t;
}

return data;
}
}

var parser = new Parser();

parser.on("readable", function() {
var e;
while (e = parser.read()) {
console.log(e);
//console.log(e);
}
});

parser.write(new Buffer([0x00, 0x00, 0x00, 0x00, 0x01]));
parser.write(new Buffer([0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x61, 0x00, 0x62, 0x00, 0x00, 0x00, 0x00, 0x00]));
parser.write(new Buffer([0x02, 0x01, 0x00, 0x02, 0x00, 0x61, 0x00, 0x62, 0x00, 0x02, 0x00, 0x63, 0x00, 0x64, 0x00, 0x00, 0x00, 0x05]));
parser.write(new Buffer([0x03, 0x00, 0x02, 0x00, 0x65, 0x00, 0x66]));
parser.write(new Buffer([0x04, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01]));
for (var i = 0; i < 50000; i++) {
parser.write(new Buffer([0x00, 0x00, 0x00, 0x00, 0x01]));
parser.write(new Buffer([0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x61, 0x00, 0x62, 0x00, 0x00, 0x00, 0x00, 0x00]));
parser.write(new Buffer([0x02, 0x01, 0x00, 0x02, 0x00, 0x61, 0x00, 0x62, 0x00, 0x02, 0x00, 0x63, 0x00, 0x64, 0x00, 0x00, 0x00, 0x05]));
parser.write(new Buffer([0x03, 0x00, 0x02, 0x00, 0x65, 0x00, 0x66]));
parser.write(new Buffer([0x04, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01]));
}
35 changes: 19 additions & 16 deletions example-loop.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,28 +2,31 @@

var Dissolve = require("./index");

var parser = Dissolve().tap(function() {
var data_i = 0;
var parser = Dissolve()
parser.parser = function*() {
var data_count;
var data, elements, i, j;

this.uint8("data_count").loop("data", function(end) {
if (data_i++ === this.vars.data_count) {
return end(true);
}
while (true) {
data = [];
data_count = yield this.uint8();

var elements_i = 0;
for (i = 0; i < data_count; i++) {
elements = []
element_count = yield this.uint8();

this.uint8("element_count").loop("elements", function(end) {
if (elements_i++ === this.vars.element_count) {
return end(true);
for (j = 0; j < element_count; j++) {
elements.push({ element: yield this.uint8() });
}

this.uint8("element");
data.push({ elements: elements });
}

this.push({
data: data
});
}).tap(function() {
this.push(this.vars);
this.vars = Object.create(null);
});
});
}
};

parser.on("readable", function() {
var e;
Expand Down
44 changes: 30 additions & 14 deletions example.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,22 +2,38 @@

var Dissolve = require("./index");

var parser = Dissolve().loop(function(end) {
this.uint8("id").tap("payload", function() {
this.tap("asdf", function() {
if (this.vars.id === 0x01) {
this.uint16be("a").uint16be("b");
} else if (this.vars.id === 0x02) {
this.uint32be("x").uint32be("y");
} else if (this.vars.id === 0x03) {
this.floatbe("l").doublebe("m");
var parser = new Dissolve();
parser.parser = function*() {
var id, payload;

while (true) {
id = yield this.uint8();

if (id === 0x01) {
payload = {
"a": yield this.uint16be(),
"b": yield this.uint16be()
};
} else if (id === 0x02) {
payload = {
"x": yield this.uint32be(),
"y": yield this.uint32be()
};
} else if (id === 0x03) {
payload = {
"l": yield this.floatbe(),
"m": yield this.doublebe()
};
}

this.push({
id: id,
payload: {
asdf: payload
}
});
}).tap(function() {
this.push(this.vars);
this.vars = Object.create(null);
});
});
}
};

parser.on("readable", function() {
var e;
Expand Down
Loading