Petr Pučil generalmimon

Making Kaitai Struct https://kaitai.io better, one commit at a time

generalmimon / fileformats-url-digger.js

Created May 29, 2020 23:22

Dig URL paths from Just Solve The File Format Problem wiki in parallel with Node.js

	const http = require('http');

	const MAX_ACTIVE = 100; // maximum number of parallel requests
	let numActiveReqs = 0;
	let numWaitingReqs = 0;

	const paths = new Set();
	const options = {
	host: 'fileformats.archiveteam.org',
	port: 80,

generalmimon / systemticks-payload-typeinfo.yml

Last active July 2, 2020 17:15

The recommended way of handling the situation described in https://www.systemticks.de/2020/06/09/dlt-parser-from-kaitai.html#known-issues-and-possible-improvements using KSY

	# listing 4
	seq:
	- id: payload
	type: type_info
	size: 4 # not strictly necessary, but it's safer to wrap the `type_info` into the substream like this,
	# because if the bitfields `types/type_info/seq` wouldn't fill the whole 4 bytes, it would still work
	# (see https://doc.kaitai.io/user_guide.html#_streams_and_substreams)
	types:
	type_info:
	seq:

generalmimon / fetch-json-as-data-url.js

Last active September 6, 2020 11:26

Fetch JSON file on the Internet and convert it to Data URL (the JSON data will be Base64-encoded in the URL)

	function fetchJSONAsDataURL(url) {
	return fetch(url)
	.then(r => r.blob())
	.then(data =>
	new Promise(
	(resolve, reject) => {
	const blob = new Blob([data], {type: 'application/json'});
	const rdr = new FileReader();
	rdr.onload = (e) => {
	resolve(e.target.result);

generalmimon / microsoft_cab.ksy

Created October 8, 2020 17:53

A KSY spec for Microsoft CAB files by @computerquip (https://github.com/kaitai-io/kaitai_struct/issues/817#issuecomment-705247470)

	meta:
	id: cab
	file-extension: cab
	endian: le
	license: CC0-1.0
	doc-ref: http://download.microsoft.com/download/4/d/a/4da14f27-b4ef-4170-a6e6-5b1ef85b1baa/[ms-cab].pdf

	seq:
	- id: magic
	contents: "MSCF"

generalmimon / github-subscribe-to-repos.sh

Last active April 16, 2021 21:02

Bulk subscription to GitHub repos

generalmimon / textarea-drafts.js

Last active January 17, 2021 23:23

User JS to automatically save <textarea> contents into browser localStorage (intended for GitHub)

	// Not working version right now, grab an older one from Revisions
	(function(storageKey) {
	'use strict';

	const IDLE_DELAY = 10 * 1000; // in miliseconds
	let timeout;
	let currentPageKey = null;

	class UrlSync {
	constructor() {

generalmimon / fallout-terminal-hacking-table.js

Last active April 16, 2021 20:58

A simple script for calculating a table with numbers of different letters between every two words

	/**
	* A simple script for calculating a table with numbers of different letters between every two words.
	*
	* Tip: open DevTools by Ctrl+Shift+I or F12 and paste it into the JavaScript Console :)
	*
	* @license
	* SPDX-FileCopyrightText: 2021 Petr Pucil <[email protected]>
	*
	* SPDX-License-Identifier: CC0-1.0
	*/

generalmimon / deflate_stream.ksy

Last active February 15, 2021 12:31

(WIP) Kaitai Struct YAML specification of the raw DEFLATE compressed data stream format

	meta:
	id: deflate_stream
	xref:
	rfc: 1951
	license: MIT
	bit-endian: le
	doc-ref: https://github.com/golang/go/blob/f90e89e/src/compress/flate/inflate.go#L301
	seq:
	- id: hdr
	type: header

generalmimon / log2_int32.ksy

Created January 30, 2021 14:41

A Kaitai Struct YAML specification for finding the log2 of a 32-bit integer

	meta:
	id: log2_int32
	title: Find the log base 2 of a 32-bit integer
	license: CC0-1.0
	doc-ref: https://graphics.stanford.edu/~seander/bithacks.html#IntegerLog
	# params:
	# - id: val
	# type: u4
	seq:
	- id: log2

generalmimon / fix-nim-windows-no-ssl-ca-certs.md

Last active April 16, 2021 20:27

Fix Nim error saying "Could not download: No SSL/TLS CA certificates found." on Windows

If you're trying to do nimble install from https:// or another nimble internet task (e.g. nimble refresh) and you get the following error:

PS C:\nim-1.4.4> nimble install --verbose 'testify@#9871d37'

	#!/bin/sh
	# SPDX-FileCopyrightText: 2020 Petr Pucil <[email protected]>
	#
	# SPDX-License-Identifier: CC0-1.0

	while IFS= read -r line; do
	echo "$line"
	echo
	curl \
	-X PUT \