bitworker's blog

function pointer to class methods

2009-08-11T07:29:00.001-07:00

C++ function pointer to a class method:

class Giant {
public:
void method();
};

typedef void (Giant::*Action)();

Taken from Command - Design Pattern
http://www.vincehuston.org/dp/command.html

software design

2009-08-10T07:50:00.000-07:00

Excellent descriptions of design patterns, antipatterns, refactoring methods and uml :
http://sourcemaking.com/

Here is another one, restricted to design patterns:
http://www.vincehuston.org/dp/

mashups

2009-01-20T22:19:00.000-08:00

Here are some mashup sites I created in 2007 to experiment with youtube api, flickr api:

flickr: http://foto.web-cafe.ro/
youtube: http://www.cafetv.ro/
blogs/rss/atom: http://web-cafe.ro/

Scrum, XP, Agile

2009-01-20T22:05:00.000-08:00

Lots of Scrum, XP, Agile, Lean, TOC, TQM resources:
http://www.scrumlabs.com/

A Free InfoQ book on Scrum and XP:
http://www.infoq.com/minibooks/scrum-xp-from-the-trenches

Wordpress Plugin: Simple Sticky Posts

2008-04-03T00:29:00.000-07:00

Plugin features:
Adds simple sticky posts feature to WordPress blogs.

Download:
Simple Sticky Posts 0.1 For WordPress 2.x.x

Installation:
1. Go to 'wp-content/plugins' folder
2. Copy 'simple-sticky-posts.php' to 'wp-content/plugins' folder
3. Activate the 'Simple Sticky Posts' plugin
4. You are ready.

Usage:
1. Open the post to be marked sticky in wordpress editor.
2. Add a Custom Field named 'sticky' and set its value to '1'
3. You are ready.

Screenshots:
available soon.

Demo:
available soon.

Version history:
4/3/2008 - version 0.1 - created

Any bug reports, feature requests are welcome.

simple bash stuff

2008-03-27T09:50:00.000-07:00

Run applications from the linux terminal, as a new process:

> apptorun &

Other linux bash command line tips:

http://www.arachnoid.com/linux/shell_programming.html

dev-c++ / wxdev-c++

2007-04-18T01:42:00.000-07:00

dev-cpp and wxdev-cpp: the best c++ IDE for open source programming / cross platform programming on windows.

http://www.bloodshed.net/devcpp.html

Has an version for developing wxWidgets based GUI for applications.
http://wxdsgn.sourceforge.net/

Try the check for updates feature, where you can select tons of c++ open source libraries to be reused in your applications.

Other places to find extensions:
http://www.bloodshed.net/dev/devcpp.html
http://devpaks.org/
http://blog.weinachter.com/en
http://sourceforge.net/project/showfiles.php?group_id=94270

stl fstream and macros on vs7

2006-11-06T10:04:00.000-08:00

while working with visual studio 2003 / 7, c++, fstream, log files and macros, like the following:

#define LOGMACRO (format_string, ...) log (__FILE__, __LINE__, format_string, __VA_ARGS__)

got some errors:

error C2059: syntax error : '...'
error C2061: syntax error: identifier '_DebugHeapTag'
xdebug(29): _CRTIMP2 void * __cdecl operator new(size_t, const std::_DebugHeapTag_t&, char *, int)
_THROW1(std::bad_alloc); // allocate from the debug CRT heap

the solution was in 4 steps:

1. replacing all stl include files matching the pattern:

#include <string.h>
#include <fstream.h>

with header files without '.h' in their names, ex:

#include <string>
#include <fstream>

2. putting some parantheses around the parameters in the macro def. value, like:

#define LOGMACRO (format_string, ...) log (__FILE__, __LINE__, (format_string), __VA_ARGS__)

3. replacing '...' and '__VA_ARGS__' with a simple parameter. vs7 does not support varargs in macros.

#define LOGMACRO (format_string, args) log (__FILE__, __LINE__, (format_string), (args))

4. putting the fstream include in the last line of stdafx.h, removing from any other location in the source code like below.

#include <fstream>
using namespace std;

In addition to the things described above, here is a nice macro tutorial: http://en.wikipedia.org/wiki/C_preprocessor

linux command line tips

2006-11-02T01:01:00.000-08:00

This is a list of linux commands for common operations.
Here is a list of tar, cpio and rpm command samples.

merge .net assemblies

2006-09-04T08:29:00.000-07:00

this is a microsoft tool to merge multiple .net assemblies:
ILMerge

usually there are lots of assemblies in one project and the release looks kind of messy, merging them in to a single file can be very usefull

cross platform UML design tools

2006-05-25T05:50:00.000-07:00

here is a 2005 aug study on existing cross platform UML tools:
http://www.linuxjournal.com/article/8334

discussed tools:
- dia
- poseidon
- magicdraw

google summer of code 2006

2006-04-26T03:46:00.000-07:00

google summer of code is starting again>
http://code.google.com/summerofcode.html

documenting the code

2006-03-31T02:51:00.000-08:00

A few useful links to source code documentation tools:

doxygen quick tutorial
Kings Tools - a set of useful tools for writing and documenting code (incorporates doxygen). Visual Studio .NET only.
DoxyS - an advanced documentation tool - branched from doxygen

more of them:
here

web API samples

2006-03-17T07:13:00.000-08:00

flickr API:
http://www.flickr.com/services/api/
google API:
http://www.google.com/apis/
amazon API:
http://www.amazon.com/gp/brows...5361&
w3c web API:
http://www.w3.org/2006/webapi/

list of web APISs:
http://www.programmableweb.com/apis

english words

2006-03-14T03:11:00.001-08:00

tenet - "Anyone insterested in learning UML must be familiar with the underlying tenet of object/oriented problem solving"

testing related resources:

2006-02-14T00:13:00.000-08:00

theory

"testing reflections" blog
http://www.testingreflections.com/

Bug Tracking Guidelines
http://bug-tracking-guidelines.com/

Bug triage policy
Here

Microsoft's Bouncing Zero Bugs

"Bug Links" blog
http://buglinks.org/

bugtracker software:

BugTracker.NET
http://btnet.sourceforge.net/

Mantis Bug Tracker
http://www.mantisbt.org/

Flyspray
http://flyspray.rocks.cc/

Bugzilla
http://www.bugzilla.org/

trac
http://www.edgewall.com/trac/

AceProject
http://www.aceproject.com/

Open Directory - Bug Tracking Software

Open Source Testing
http://opensourcetesting.org/

livavformat and libavcodec

2006-02-08T09:32:00.000-08:00

here is a tutorial on using libavcodec (and libavformat)
libavformat does the demux stuff, libavcodec the video and audio codec work.

libavcodec on wiki (implemented codecs and other stuff)

video processing tools

2006-02-08T09:17:00.000-08:00

virtual dub:
http://www.virtualdub.org/

nundub (a 'hacked' version of virtual dub):
http://ndub.sourceforge.net/
http://nickyguides.digital-digest.com/nandub.htm

PiTiVi (linux):
http://pitivi.sourceforge.net/

Creative Commons

2006-02-08T06:09:00.000-08:00

Creative Commons is a nonprofit organization that offers flexible copyright licenses for creative works.
can be found here

gstreamer issues

2006-02-07T00:58:00.000-08:00

here is a tutorial how to compile gstreamer on windows

here is the homepage of gstreamer

here is the cvs repository for gstreamer

download glib

the gstreamer's story

here is pitivi, a video playback and editing tool based on gstreamer

design patterns - collection of resources

2006-02-02T06:07:00.000-08:00

link - Design Patterns - The Sacred Elements of the Faith Diagramm

STL allocators

2006-02-01T05:48:00.000-08:00

Here is a tutorial about writing STL based allocators

SMMP - shared memory processors and code optimization

2006-02-01T05:47:00.000-08:00

Here is a CodeProject article about writing code that can use the power of SMMP.

ms windows - memory allocation

2006-02-01T04:52:00.000-08:00

Here is the link to microsoft memory allocation related functions.

here are some undocumented functions described in a CodeProject article.
--

here is a memory pool implementation - CodeProject article

wiki software

2006-01-30T08:27:00.000-08:00

here is a list of wiki software on wikipedia

c++ typecasting

2006-01-30T06:09:00.000-08:00

Here you can find a c++ typecasting tutorial.

It is part of a great c++ programming tutorial - here

for dynamic_casting you need to enable the Run-Time Type Information (RTTI)
in visual studio: project properties - c/c++ - language - Enable Run-Time Type Info

sqlite vs mysql vs postgresql

2006-01-30T05:12:00.000-08:00

here is a performance comparision test for sqlite, mysql and postgresql.

can also be found here

memcached

2006-01-16T04:39:00.000-08:00

Here is the homepage of memcached - a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
websites using memcached : slashdot, sourceforge, wikipedia.

kde apps

2006-01-13T08:11:00.000-08:00

Here is a long list of kde api based development tools

kdevelop related apps here

some more software developer or IT blogs

2006-01-12T01:25:00.000-08:00

andy jarret blog - mainly web development related

the { buckblogs :here } assorted_ramblings.by JamisBuck

an other "adventurous blog" :) - "Fabulous Adventures In Coding" blog
http://blogs.msdn.com/ericlippert/default.aspx

Eric.Weblog()
http://software.ericsink.com/index.html

bob congdon
http://www.bobcongdon.net/blog/

sönke rohde - flash, eclipse and others
http://soenkerohde.com/

SIG33 and the other POSIX RT (runtime) signals

2006-01-10T06:39:00.000-08:00

Here is a tutorial about POSIX signals.

from an other source:
if you get "Program received signal SIG35, Real-time event 35.", this is due to a directory changing rather than a bug. You can disable these events and then c(ontinue) (the signal number may vary):

(gdb) handle SIG33 noprint nostop
(gdb) c

there is also mentioned strace :

$ strace -p PID

$ strace -p PID -t

other 'tools' for debug and tracing:
- valgrind
- debug for linux

gcc, dlopen and cdecl

2006-01-09T08:44:00.000-08:00

Here is a small tutorial about loading .dll-s (.so-s) under linux and the solution to the mangling problem.

shortly : to make available your function written in c++ for dlopen use extern "C" before the function header :

extern "C" void hello() {
std::cout << "hello" << '\n';
}

Develop Desktop GUI Apps with PHP-GTK, the Standalone PHP

2006-01-09T02:47:00.000-08:00

Here is an article about writing desktop applications using PHP language and the PHP-GTK package.

gcc issues

2006-01-06T06:57:00.001-08:00

Here is a gcc howto

linux boot and startup & other stuff

2006-01-06T02:24:00.000-08:00

Here and here are some tutorials on the linux boot sequence.

- to run custom scripts/applications at startup, place them in the /etc/rc.d/rc.local (at least for Fedora Linux Core 4).
- to run customs scripts/apps at login, place the commands in ~/.profile

other linux:
controlling "jobs"
tips and tricks

gcc personality problems

2006-01-05T05:14:00.000-08:00

gcc - the c compiler - has a pretty funny error, when you try to compile a non c file with it:

undefined reference to `__gxx_personality_v0'

one has to rely on the "personality" of g++ to keep the intergrity of the gcc self-esteem.

rar archiver for linux

2006-01-05T04:52:00.000-08:00

Here is the rar archiver distribution for different platforms (linux also)

linux environment, startup settings

2006-01-05T01:26:00.000-08:00

Here is a tutorial on linux environment, shell selection and startup settings

simple, server-less database

2006-01-04T06:32:00.000-08:00

Here is the SQLite home page, a library for working with very simple database files, using sql queries. It is a self-contained, embeddable, zero-configuration SQL database engine.

linux - Bourne / awk shell scripting

2006-01-03T01:43:00.000-08:00

Here is a tutorial on Bourne shell scripting

here is a grep tutorial

here is a detailed list of Csh scripting language problems

chair for internet surfing

2005-12-29T12:49:00.000-08:00

this is claimed to be a chair for internet surfing.

linux tutorials

2005-12-21T06:34:00.000-08:00

Here is a very nice tutorial about using the autoconf/automake/autoheader tools under *nix.

Here is a linux system admin tutorial.

mysql_connect(): Client does not support authentication protocol requested by server; consider upgrading MySQL client

2005-12-20T02:24:00.000-08:00

PHP can give you this error when trying to connect to an mysql database.
To solve this problem run the mySql command line client and enter the following command:
SET PASSWORD FOR 'user'@'host' = OLD_PASSWORD('password');

example:
my user: is peter, my password: something and my host: localhost
the command will be:

SET PASSWORD FOR peter@localhost = OLD_PASSWORD('something');"

spam blog?

2005-12-19T05:37:00.000-08:00

well.. i just got the 'word verification' for each new post and any change i make to my posts - probably because i have tested flock to create blogs -
well i very dislike this stuff. i think i will just move to an other blogger site.

user breakpoint - Breakpoint exceptions from the heap

2005-12-19T05:15:00.000-08:00

New programmers sometimes ask why the debugger stopped at a ‘userbreakpoint’ exception in their program. The exception dialog will comeup and say something like:

Unhandled exception at 0x77f75a58 in CoruptHeap.exe: User breakpoint.

The callstack might be something like:

ntdll.dll!77f75a58()
ntdll.dll!77f9cb5e()
ntdll.dll!77f82c95()
ntdll.dll!77f9cf55()
ntdll.dll!77f8c366()
kernel32.dll!77e75b6c()
kernel32.dll!77e6c75a()

Or if you have symbols:

ntdll.dll!_DbgBreakPoint@0()
ntdll.dll!RtlpBreakPointHeap(void *)
ntdll.dll!RtlpValidateHeapEntry(_HEAP *, _HEAP_ENTRY *, char *)
ntdll.dll!RtlDebugFreeHeap(void *, unsigned long, void *)
ntdll.dll!RtlFreeHeapSlowly(void *, unsigned long, void *)
ntdll.dll!RtlFreeHeap(void *, unsigned long, void *)

The problem is that your program has corrupted the heap. Thisusually happens when writing to freed memory, or when writing past theend of a buffer. Use pageheap to try and figure out where your program went wrong.

the above text was taken from the following page:
http://blogs.msdn.com/greggm/default.aspx
btw ; great c++ developer blog.

you entar in the mySql command line client and enter the following command SET PASSWORD FOR 'user'@'host' = OLD_PASSWORD('password');

example:
my user: is peter, my password: something and my host: localhost

the command will be:

Here is a document on debugging linux aps.

electric fence - debug tool for linux: here and here
Lately is known as duma

howto setup proxy under linux

2005-12-18T06:24:00.000-08:00

export http_proxy="http://username:passwd@yourproxy.company.com:portnumber/"

weblog awards 2005

2005-12-16T04:27:00.000-08:00

Here is the weblog award contest for 2005

C++ STL & related stuff

2005-12-14T10:31:00.000-08:00

Here is a nice STL tutorial.

More Ajax resources

2005-12-12T23:37:00.000-08:00

MagicAjax - ajax for asp.net
here is the homepage of a new ajax framework written for asp.net

Ajax Patterns
http://ajaxpatterns.org/Main_Page

fooling fingerprint readers

2005-12-12T06:51:00.000-08:00

here is an interesting article about how fingerprint readers can be fooled by easy to make fingerprint imitations

downloadable blog engines

2005-12-09T10:31:00.000-08:00

http://www.nexcess.net/hosting/support/tutorials/

b2 0.6.2.2 - Classy News/Weblog Tool

b2evolution 0.8.9
http://b2evolution.net/
Multilingual Multiuser Multi-Blog Engine

bBlog 0.7.3
Blogging System Written in PHP

bMachine 2.8
Blog/Journal/Article Publishing System
CuteNews 1.3.1
Simple News Updating Script

Fusion News 3.6.1
Unique, Fast, Powerful News Management

Geeklog 1.3.9
Weblog/Web Portal Software

Greymatter 1.3
Weblog/Journal Software

Nucleus 2.5 Beta
State-of-the-Art Weblog Publishing System

pLog 0.3.1 Beta 1
Open-Source Blogging Software

pMachine 2.3
Online Publishing's Most Flexible, Creative Software

Serendipity 0.6 RC 1
PHP Weblog/Blog Software

Simplog 0.9
Powerful, Yet Simple Web Log

WordPress 1.0.2
http://www.wordpress.com/
State-of-the-Art Publishing Platform

disable internet on windows desktop

2005-12-09T08:09:00.000-08:00

a very simple way to disable the internet connection
http://www.winguides.com/registry/display.php/1288/

Open your registry and find the key below.

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]

Change the value of "ProxyEnable" and set it to "1". Change the value of "ProxyServer" and set it to an IP address and port that is invalid on your network such as "10.0.0.1:5555" (i.e. "IP:Port").

By changing these settings Internet access will be disabled for any applications that rely of the Microsoft proxy server information such as Internet Explorer, Microsoft Office, Opera browser.

To stop users from modifying the proxy settings add these restrictions to disable changes to the Internet configuration.

Find or create the key below:

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Control Panel]

Create two DWORD values named "Connection Settings" and "Connwiz Admin Lock" and set them both to "1".

To remove the restriction, set the proxy settings back to their original values and delete the policy values.

linux stuff

2005-12-09T07:53:00.000-08:00

/usr/bin/system-config-*
for configuration of different devices

SEO and google

2005-12-08T16:06:00.000-08:00

this will be a collection of SEO related resources :

http://seobykeli.blogspot.com/

macedonia and the technical innovations

2005-12-08T15:59:00.000-08:00

macedonia, the near future high-tech and innovation paradise in europe?

first : Nationwide Wi-Fi for Macedonia
http://www.wi-fiplanet.com/news/article.php/3565381

second : ubuntu linux will be used in schools
http://slashdot.org/article.pl?sid=05/12/05/191205 />

netvibes

2005-12-08T15:51:00.000-08:00

Netwibes - just an other ajax beauty :)
this one is to gather everyday information from free information resources available on the web.

flock reloaded

2005-12-08T14:28:00.000-08:00

Well here is a somewhat similar project, but more frank one in the means of giving them the name of distribution not a new browser - as some people criticised flock (I don't agree with that :) ). I refer to Firemonger distribution of Firefox.

The other issue to be discussed would be the VCs, the boom of venture capital investments in Web 2.0 implementations. This is an interesting blog about this subject.

And here is the O'Reilly Radar blog, from the very "heads" of O'Reilly publishing.

slashdot effect

2005-12-08T00:59:00.000-08:00

The Slashdot effect is a particular example of how incoming links from a popular website (ex. http://www.slashdot.com) can cause a smaller site to slow down or even temporarily close due to the increased traffic.

http://en.wikipedia.org/wiki/Slashdot_effect

cheetsheets for web developers

2005-12-07T00:49:00.000-08:00

here is a list of cheetsheets for mainly web developer and linux related software development issues.

technorati

2005-12-07T00:46:00.000-08:00

here is the Technorati weblog tag cloud.

Trendy people assign their blog entries to technorati tags.

there is a blog search and popular blog page too.

flock browser

2005-12-06T12:36:00.000-08:00

here you can find the flock browser, under development yet.

So far, Flock works with Del.icio.us and Flickr,and allows you to post to your blog from the browser (blogger, wordpress). Supports tagging, advanced feed reader features.

Flock works on Windows, Mac, and Linux.

They are a really open development team. The whole team is blogging and sharing the thoughts online, in their blog. Great!

viva la flock! :)

opensource license types

2005-12-06T06:19:00.000-08:00

a collection of the open source licenses can be found here

google blogscoped

2005-12-06T02:24:00.000-08:00

http://blog.outer-court.com/
blog about google

http://blog.outer-court.com/files/google-history.html
google history / text art

WTL - windows template library

2005-12-06T01:50:00.000-08:00

Windows Template Library (WTL) is a C++ library for developing Windows applications and UI components. It extends ATL (Active Template Library) and provides a set of classes for controls, dialogs, frame windows, GDI objects, and more.

WTL 7.5 and newer:
http://wtl.sourceforge.net/

Microsoft webpage:
WTL 7.0 download on msdn
WTL 7.1 download on msdn
WTL 7.1 release notes
WTL 7.5 download on msdn

Microsoft WTL Licensing

Microsoft development forums: here

cvs for windows

2005-12-06T00:18:00.000-08:00

The WinCVS GUI:
http://www.wincvs.org/
for some features needs python:
http://www.python.org/
maybe you would consider using:
http://www.lucatec.de/tools/proxydiff-en.shtml
to select the diff tool used for wincvs.
or CVS SCC Proxy - add plugins for VS, BC++:
http://www.pushok.com/soft_cvs_proxy.php

Tortoise CVS - a windows explorer extension:
http://www.tortoisecvs.org/

CvsIn - an extension for Visual Studio:
http://www.geocities.com/kaczoroj/CvsIn/

favorite Firefox plugins

2005-12-06T00:05:00.000-08:00

flashgot
duplicate tab
color-zilla
measure it
session saver
all-in-one sidebar
web developer
linkification
js console extras
adblock
customize google

PHP safe mode & gallery2

2005-12-05T11:15:00.000-08:00

Some components need Safe Mode disabled for PHP:
Solution:
http://www.webhostgear.com/166.html

Customizing PHP Safe Mode

We’ll guide you through using PHP safe_mode and how-to enable it and to customize it for certain sites on your server. When using PHP as an Apache module, you can also change the configuration settings using directives in Apache configuration files (e.g. httpd.conf) and .htaccess files. PHP safe_mode is very important to in terms of server security because it restricts and disables the dangerous functions in PHP from the scripts like PHP Shell that can otherwise cause damages to your server and client sites.

Using PHP Safe_Mode

First of all we’ll take care of the files that you will edit, and make sure to have copy or backup .

Activate Safe Mode Globally

It is very simple to active safe mode on the entire server. All you need to do is just edit the php.ini file. If you can’t find where php.ini is or have multiple copies on your server the best thing to do is run phpinfo() to find it. Open up Notepad or your favorite HTML editor and paste in the following from this file.

http://www.webhostgear.com/phpinfo.phps

Save it as phpinfo.php and upload it to a website that you want to test on your server. Type in the URL and you’ll get a PHP configuration page telling you exactly where php.ini is located and all kinds of other useful information about the sites and servers configuration settings.

A few lines down you’ll see this:
Configuration File (php.ini) Path: /usr/local/Zend/etc/php.ini
Now that we know the location of php.ini we can proceed to edit it.

1) Open up php.ini in your shell with your favorite editing program.
pico /path to php/php.ini (replace with the path to your php.ini file)

2) Find the following line: safe_mode
Ctrl + W and type in: safe_mode

3) Turning safe mode on or off.
safe_mode = Off

You may active it by or turn it off by changing it to either On OR Off.
safe_mode = On

Good! Now save the file by ctrl + x then y

4) Restart the Apache web server by
/etc/init.d/httpd restart

Now safe_mode is active on all your server accounts.

Activate Safe Mode Using Per Site Basis

Now if you have scripts that require safe mode off like Modernbill or any script doesn't work well with safe_mode on what you will do? Disable safe_mode on the entire server just for these scripts? This isn’t very practical when you can disable php safe mode per user account/site basis.

Let’s do it!
1) SSH to your server and login as root.

2) Then find the httpd.conf, normally it’s in /etc/httpd/conf/ or /usr/local/apache/conf/
If it’s not in either of those places try search for it: locate httpd.conf

3) Then find the site you wish to edit.
Ctrl+W and type in the domain name

You should see something like this

ServerAlias www.domain.net domain.net
ServerAdmin webmaster@domain.net
DocumentRoot /home/domain/public_html
BytesLog domlogs/domain.net-bytes_log
ServerName www.domain.net
User domain
Group domain
CustomLog domlogs/domain.net combined
ScriptAlias /cgi-bin/ /home/domain/public_html/cgi-bin/

4) Now add this line:

php_admin_flag safe_mode Off

We have also found that the following works as well if the above does not but DO NOT USE BOTH, pick one!

php_admin_value safe_mode 0

to be like this :

ServerAlias www.domain.net domain.net
ServerAdmin webmaster@domain.net
DocumentRoot /home/domain/public_html
php_admin_flag safe_mode Off
BytesLog domlogs/domain.net-bytes_log
ServerName www.domain.net
User domain
Group domain
CustomLog domlogs/domain.net combined
ScriptAlias /cgi-bin/ /home/domain/public_html/cgi-bin/

5) Good :) Now save the changes.
Ctrl + X then Y

6) Restart the Apache web server by
/etc/init.d/httpd restart

Final Words

PHP Safe mode should be on by default on all your servers for added security. However there are some scripts that are not compatible with it on so you have to make an exception to some client sites. Make sure you know why they’re requesting to have it turned off because it is much more secure for everyone to have it on.

If you run into trouble after editing httpd.conf you can run the apachectl configtest
in shell. This will test the Apache configuration for errors and report them back to you if you can’t start it, very handy indeed!
More PHP customizing commands here: http://php.us.themoes.org/manual/en/configuration.changes.php

Contributed by ReRoot, edited by Ramprage

Global filesystems and implementations

2005-12-05T06:26:00.000-08:00

wiki on this subject:
http://en.wikipedia.org/wiki/Global_filesystem

AFS:
http://en.wikipedia.org/wiki/Andrew_file_system

DFS:
http://en.wikipedia.org/wiki/Dfs

Coda:
http://en.wikipedia.org/wiki/Coda_%28file_system%29
http://linuxplanet.com/linuxplanet/tutorials/4481/1/
http://www.mcc.ac.uk/~zlsiial/coda/
Repository for Coda:
http://www.konvalo.org/

Inter-mezzo, integrated in linux distributions:
http://www.inter-mezzo.org

libtorrent reloaded

2005-12-05T05:50:00.000-08:00

here is the original homepage

here is the documentation page

for compiling one needs:
Boost Build System V2

the following description is taken from here:

LibTorrent description Download
LibTorrent is a BitTorrent library written in C++ for Unix. It is designed to avoid the redundant buffers and data copying that most (all?) other BitTorrent implementations suffer from.

The library is single-threaded and the client handles the select loop. An interactive ncurses client is included as an example.

Here are some key features of "LibTorrent":

· The client has full control over the polling of sockets.
· Sigc++ signals makes i easy for the client to react to events.
· Fast resume which checks the file modification time.

Direct reading and writing from network to mmap'ed files:

· Avoids duplication of data where both the application and the kernel has a copy of the file chunk.
· Unused chunks get thrown out or written to disk instead of the swap.
· Kernel handles caching of the file.

File hash check:

· Uses the same thread.
· Client can control the rate. (Will be improved)
· Non-blocking and preload to memory with the mincore and madvise system calls.

File handler:

· Fine-grained use of file read/write permissions, allows seeding of read-only files.
· Allows torrents with unlimited number of files.
· Opens closed files when mapping chunks to memory, with graceful error handling.
· Support for files larger than 2 GB.
· Different download priorities for files in the torrent.

· Multi-tracker support.
· No dependency on any specific HTTP library, the client implements a wrapper class.
· Dynamic request pipe size.
· Upload and download throttle.
· And much more i haven't bothered mentioning. (nor implementing)

Requirements:

· libsigc++ 2.0

What's New in This Release:

· Replaced most of the sigc++ slots used internally in libtorrent with my own lightweight functor. This saves some 600kb in debugging symbols.
· Various bug fixes.

dependency hell

2005-12-05T05:47:00.000-08:00

A small introduction to linux dependency hell:
http://en.wikipedia.org/wiki/Dependency_hell

Windows XP Tablet PC programming - first steps

2005-12-03T16:10:00.000-08:00

Two of the most innovative features of the Tablet PC are the pen and microphone.

Much of the Tablet PC API is remarkably easy. With just a few lines of code you can attach an InkOverlay object to any Windows Forms control and implement functionality related to handwriting or voice recognition.
More details: here

For more accurate control over the features of Tablet PC there is an other, far more versatile API, the Real-Time Stylus.
More details: here

how to write a popular blog ? :)

2005-12-03T09:24:00.000-08:00

I have created this blog to keep the track of some of the problems I had to solve and the solutions I found. So you don't have to learn the same things over and over, just look back in your notes.

Unfortunately google's blogger does not have categories for entries (yet) like other bloggers. It would make my task a lot easier.

I just wondered how other software developers do write their blogs. What makes a blog popular or accessible, readable.
For what reason?:) Because as I finally decided yesterday to publish the blog, in a few hours lots of people were interested in the blog, but.. they just checked the first page and got bored of the content. :) Maybe the name of the blog was interesting, but the content very boring. :)

So I will try to create a good combination of issues of possibble public interest and technical details.

A similarly challenging issue would be how the content will get to the potencial readers? Well.. time will tell.

The most popular blogs worldwide:
http://www.technorati.com/pop/blogs/

blog API's

2005-12-02T07:49:00.000-08:00

There are several API-s to retrieve, add, delete, ... data from / to / on blog servers.

An overview:
http://www.xml.com/pub/a/2003/10/15/dive.html

LiveJournal API:
http://livejournal.com/doc/server/ljp.csp.flat.protocol.html

Blogger API:
http://www.blogger.com/developers/api/1_docs/

MetaWeblogAPI:
http://www.xmlrpc.com/metaWeblogApi

Atom API:
http://code.blogger.com/archives/atom-docs.html
http://bitworking.org/projects/atom/draft-gregorio-09.html

acronyms

2005-12-02T07:33:00.000-08:00

"tbd" means "to be determined"; that is, we are still discussing the best values for this entry

"n/d" means no data reported for this field name

POC - Proof of Concept - a small project sometimes done at no charge to validate a technology.

aka - also known as - author pseudonyms, aliases, nicknames.

UPnP

2005-12-02T07:19:00.000-08:00

Universal Plug and Play

The goals of UPnP are to allow devices to connect seamlessly and to simplify the implementation of networks in the home and corporate environments.

the very idea:
http://en.wikipedia.org/wiki/UPNP

architecture:
http://www.upnp.org/download/UPnPDA10_20000613.htm

bittorrent ...

2005-12-02T06:01:00.000-08:00

Creator of bittorrent: Bram Cohen
http://www.bitconjurer.org/
http://en.wikipedia.org/wiki/Bram_Cohen

and his..

Getting Over Bad Habits
http://advogato.org/article/225.html

well he is pretty stressed guy.:)

here is a great article on bittorrent and its impact on the online world:

capturing video

2005-12-02T05:09:00.000-08:00

directx 9.0 sdk:
download directx 9.0 sdk

firewire - IEEE 1394:
IEEE 1394 driver and API for Windows 98 SE -> Win XP
the 1394 driver driver source code -> windows
firewire for linux
video for linux resources

Capture video on windows:
Capture Live Video from webcam, s-video, composite video, tv-tuner
Capture and save in the same time

Capture video on windows

2005-12-02T04:37:00.003-08:00

Capture Live Video from webcam, s-video, composite video, tv-tuner
Capture and save in the same time

winmerge & total commander

2005-12-02T04:37:00.002-08:00

integrate winmerge with total commander:
"X:\Program Files\WinMerge\WinMergeU.exe"
/ub "%P\%N" "%T\%M"

plugin architecture

2005-12-02T04:37:00.001-08:00

video plugins architecture: gstreamer:
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/

unhandled SIGNAL -s stop the application

2005-12-02T04:37:00.000-08:00

#for sockets SIGPIPE is fired
# MSG_NOSIGNAL can be passed for sockets send cmd as param
# you can use setsig with SIG_IGN too:
signal(SIGPIPE, SIG_IGN);

so library

2005-12-02T04:36:00.002-08:00

to compile and so lib put -fPIC -shared in CFLAGS

Here is a nice tutorial

use gdb, makefiles, g++

2005-12-02T04:36:00.001-08:00

use gdb for debugging applications:

1. #first put debug info in Makefile files:
LDFLAGS = -g -W1
CFLAGS = -g

2. #run make

3.
gdb appname
#put breakpoints with:
break [FUNC_NAME]
# [FUNC_NAME] is the function name

4. r [ARGS]
#where ARGS are the args needed for the app

5.
#s for steps
#n for next line of code
#c for run to next breakpoint
#detach to leave program running
#kill to stop app

6. to kill an app being debugged:
ps -C appname
kill -9 apppid
#after that close parent app - or type 'exit' in the parent terminal window.

--------------

Here is the KDbg home page.
KDbg = debugger for KDE, based on gdb.

----

gdb tutorials:
Debugging Under Unix: gdb Tutorial
Debugging with gdb

gnu make tutorial:
GNU make

g++ tutorial

working with svn

2005-12-02T04:36:00.000-08:00

http://svnbook.red-bean.com/

to get a previous committed version :
1.
svn list -v
#to list the files and see versions
2.
update -r [VERSION_NUM]
#where istead of [VERSION_NUM] comes the desired version number

svn commit
svn add
svn delete

use tortoisesvn under windows
use subversion under fedora linux

Microsoft Visual C++ Toolkit 2003

2005-12-02T04:35:00.002-08:00

vctoolkit2003

SPL - cross platform simple plugin layer (framework)

2005-12-02T04:35:00.001-08:00

a simple plugin layer sdk
http://www.codeguru.com/Cpp/Cpp/cpp_mfc/portability/article.php/c7159

running functions before and after main (vc 6.0 - windows)

2005-12-02T04:35:00.000-08:00

befora / after main

injecting code into an other process

2005-12-02T04:34:00.000-08:00

source codes:
winspy
remote lib

winamp plugin architecture

2005-12-02T04:33:00.000-08:00

winamp plugins

directshow filters architecture

2005-12-02T04:32:00.000-08:00

generic issues:
http://www.cs.technion.ac.il/Labs/Isl/DirectShow/filters.htm

IBaseFilter
ibasefilterinterface.asp

"Transport" models between filters:
http://www.gdcl.co.uk/data.htm

bittorent protocol specification

2005-12-02T04:00:00.000-08:00

official version:
http://www.bittorrent.com/protocol.html

other:
http://wiki.theory.org/BitTorrentSpecification
http://en.wikipedia.org/wiki/Bittorrent

directshow tutorials

2005-11-28T23:56:00.000-08:00

tutorial 1
tutorial 2

2005-11-24T05:55:00.000-08:00

microsoft directshow error codes

directx compilation problems

2005-11-21T01:59:00.000-08:00

directx compilation problem with MFC:
error LNK2019: unresolved external symbol "int __stdcall lstrlenWInternal(wchar_t const *)" (?lstrlenWInternal@@YGHPB_W@Z) referenced in function "public: ....

Solution:
The definition of lstrlenW is in , included by , i.e. DirectShow (DirectX 9.0 SDK).
Putting #undef lstrlenW after the include solves the problem.

single app instance

2005-11-14T07:06:00.000-08:00

allow only running of a single intance of an application:
- win: CreateMutex with name
- linux: sysv, futex

http://people.redhat.com/~drepper/futex.pdf

scp vs sftp

2005-11-08T00:41:00.000-08:00

http://winscp.net/eng/docs/protocols

webdav plugin - total commander

2005-11-07T05:37:00.000-08:00

webdav plugin - total commander:
http://www.totalcmd.net/plugring/webdav.html

sftp, bittorent, perl and others

2005-11-07T01:27:00.000-08:00

ActivePerl - perl for windows:
http://activestate.com/Products/Download/Download.plex?id=ActivePerl

libtorrent - portable bittorent library:
http://sourceforge.net/projects/libtorrent
http://libtorrent.rakshasa.no/

libssh2 - portable ssh and sftp lib:
http://sourceforge.net/projects/libssh2/
doc!! -> http://www.libssh2.org/doc/

winsshd - windows ssh server:
http://www.bitvise.com/download-area.html

data compression links - source code

2005-11-01T07:38:00.000-08:00

http://datacompression.info/SourceCode.shtml

2005-11-01T07:24:00.000-08:00

w3mfc - mfc web server:
http://www.naughter.com/w3mfc.html