olbat

Keybase proof

I hereby claim:

• I am olbat on github.
• I am olbat (https://keybase.io/olbat) on keybase.
• I have a public key whose fingerprint is D1CC 3AE0 5ADA FF27 BEE6 27B7 0B1A 5390 865E 24D7

To claim this, I am signing this object:

olbat

require "xml"
require "c/dlfcn"

PKGNAME  = "icu-uc"
TESTFUNC = "u_init"
{% if flag?(:darwin) %}
SOFILE   = "libicuuc.dylib"
{% elsif flag?(:windows) %}
SOFILE   = "libicuuc.dll"
{% else %}

olbat

src = STDIN.read

# iterate on "1st level" module definitions
src.dup.scan(/^module [^;]+$.+?^end/m) do |mod|
  # get the nested modules' definitions
  mdefs = mod.scan(/^ *module [^\n]+$(?=\n +module)/m).map(&:to_s)
  # stop if there is no nested module definition
  next if mdefs.empty?
  ndefs = mdefs.size
  # get the last definition that's not extracted because of the look ahead

olbat

require "benchmark"
require "./src/icu"

REPEAT=1_000

# from https://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-demo.txt
samples = [] of String
samples << <<-EOS
Σὲ γνωρίζω ἀπὸ τὴν κόψη
τοῦ σπαθιοῦ τὴν τρομερή,

olbat

module Process::KillRecursive
  refine Process.singleton_class do
    def children(pid)
      pids = nil
      if RbConfig::CONFIG['host_os'] =~ /linux/i
        if File.exist?("/proc/#{pid}/task/#{pid}/children")
          pids = File.read("/proc/#{pid}/task/#{pid}/children").split(/\s/)
        end
      elsif !Gem.win_platform?
        pids = `ps --ppid #{pid} -o pid=`.split("\n")

olbat

module Time::Measure
  refine Time.singleton_class do
    def measure(&_block)
      tstart = Process.clock_gettime(Process::CLOCK_MONOTONIC)
      yield if block_given?
      (Process.clock_gettime(Process::CLOCK_MONOTONIC) - tstart)
    end
  end
end

olbat

#!/usr/bin/env python3
"""
usage: {} < corpus.json > plot.pdf

The corpus file must contain one JSON document per line,
features must be stored in a field names "{}",
classes in a field names "{}".
"""

import sys

olbat

#!/usr/bin/python3
"""
usage: {} title data.txt [data2.txt ...] > histogram.png
"""

import sys
import math
import os.path
import matplotlib
matplotlib.use('Agg')

olbat

#!/usr/bin/python3

import sys
import unicodedata
import regex  # https://pypi.python.org/pypi/regex/

SPECIAL_CHARS = r"\-'"  # FIXME: French specific

RE_WHITESPACES = regex.compile(r"\p{Zs}+")
RE_SENTENCE_TERMS = regex.compile(r" *\p{STerm}+ *")

olbat

Crypto Notes Week 1

The first half of the course will be about sym. enc. and the second half will be about public key enc.

Introduction and Prereqs

What is cryptography?

The core of cryptography is about:

• establishing a secret key between two parties