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mooware / ld-preload-intercept-method.cpp
Last active Dec 6, 2019
Intercept C++ methods with LD_PRELOAD
View ld-preload-intercept-method.cpp
// this file is an example of how to intercept a C++ method by using the
// LD_PRELOAD environment variable of the GNU dynamic linker.
// it works like this:
// 1) define a method that will have the same symbol as the intercepted
// method when compiled. For example, the method Foo::getValue()
// defined here has the mangled symbol "_ZNK3Foo8getValueEv".
// tools like nm, objdump or readelf can display the symbols of
// binaries. note that depending on compiler and linker options,
mooware /
Created Oct 23, 2019
Python script to monitor the Windows registry and ensure that Outlook email encryption by default stays off
import ctypes, ctypes.wintypes
advapi32 = ctypes.windll.advapi32
# LSTATUS RegOpenKeyExA(HKEY hKey, LPCSTR lpSubKey, DWORD ulOptions, REGSAM samDesired, PHKEY phkResult)
RegOpenKeyExA = advapi32.RegOpenKeyExA
RegOpenKeyExA.argtypes = (ctypes.wintypes.HKEY, ctypes.wintypes.LPCSTR, ctypes.wintypes.DWORD, ctypes.wintypes.DWORD, ctypes.wintypes.PHKEY)
# LSTATUS RegCloseKey(HKEY hKey)
RegCloseKey = advapi32.RegCloseKey
mooware /
Last active Oct 10, 2019
Colored log output for Python logging framework. Works on Windows, Linux, and probably Mac as well.
# colored stream handler for python logging framework (use the ColorStreamHandler class).
# based on:
# how to use:
# i used a dict-based logging configuration, not sure what else would work.
# import logging, logging.config, colorstreamhandler
mooware /
Last active Oct 9, 2019
Simple application to play streams through HTML5 video
# uses as web framework, streamlink for getting the stream URL
# and hls.js to play the HLS stream in an HTML5 video tag
from bottle import *
from streamlink import Streamlink
from urllib.request import urlopen, Request
import sys, re, json
def u(s):
if isinstance(s, str):
mooware / constexpr-char-lookup-table.cpp
Created Sep 28, 2019
Constexpr generation of character lookup tables
View constexpr-char-lookup-table.cpp
// generate character-based static lookup tables
// that can be used for character classification,
// e.g. like in cctype functions (isdigit, isalpha ...)
struct CharLookupTable
bool data[256];
template <unsigned int N>
constexpr CharLookupTable(const char (&str)[N])
mooware / gnu-libc-print-stacktrace.c
Last active Sep 28, 2019
Print a stacktrace on Linux with GNU libc
View gnu-libc-print-stacktrace.c
// this code fragment shows how to print a stack trace (to stderr)
// on Linux using the functions provided by the GNU libc
#include <execinfo.h>
// helper-function to print the current stack trace
void print_stacktrace()
mooware /
Last active Dec 1, 2018
Script for the Pi Hut 3D Xmas Tree
from gpiozero import LEDBoard
from time import sleep
import random
tree = LEDBoard(*range(2, 28), pwm=True)
# first led is the top one in the star
tree[0].value = 0.6
leds = range(1, len(tree))
mooware /
Created Oct 13, 2017
Colorization for MSVC warnings and errors
import sys, re
COMPILE_PATTERN = re.compile(r'^.+\(\d+\) ?: (fatal )?(error|warning|note)( C\d+)?: .+$')
LINK_PATTERN = re.compile(r'^.+ : (fatal )?(error|warning) LNK\d+: .+$')
OTHER_PATTERN = re.compile(r'^.+ : (general |Command line )?(error|warning) \w+ ?: .+$')
class WinColorStream:
# wincon.h
mooware / snake.ino
Created Jun 30, 2017
Snake for Arduino on a LED matrix
View snake.ino
// snake on a MAX7219 led matrix
// NOTE: assuming the chip and pins are on the left side of the led matrix,
// row = 0, col = 0 is at the upper left corner
#include <LedControl.h>
// we're using a membrane keypad as controller
#include <Keypad.h>
mooware / tiny_string.h
Created Sep 6, 2016
An experimental "very short string optimization"
View tiny_string.h
// a fun little experiment i came up with:
// similar to the classic "short string optimization", we could actually use
// the bytes of the pointer itself as the short string buffer.
// a "tagged pointer" is used to distinguish between the internal buffer
// and a heap-allocated string.
#include <cassert>
#include <cstdint>
#include <cstring>
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