http://www.g-brain.net/tutorials/writing-linux-programs-in-raw-binary.txt
http://www.g-brain.net/tutorials/writing-linux-programs-in-raw-binary.txt

linux system call

Documents the journey from C code to assembly to machine code very nicely.

s written in C++, go play with Monotone. Really. They use a "real database". They use "nice object-oriented libraries". They use "nice C++ abstractions". And quite frankly, as a result of all these design decisions that sound so appealing to some CS people, the end result is a horrible an

c++ なくなってくれると，おれ楽なんだけどな．．.

xmpp client

Strophe is a library for writing XMPP clients. It is implemented in both JavaScript and C for use in a wide variety of languages. The implementations are production ready, well documented, easy to use, and easy to extend.

A library for writing XMPP clients. It is implemented in both JavaScript and C for use in a wide variety of languages.

"Strophe is a library for writing XMPP clients. It is implemented in both JavaScript and C for use in a wide variety of languages. The implementations are production ready, well documented, easy to use, and easy to extend."

A low-level article

Replacement for the old INT 0x80, for Pentium II and newer

"Starting with version 2.5, linux kernel introduced a new system call entry mechanism on Pentium II+ processors. Due to performance issues on Pentium IV processors with existing software interrupt method, an alternative system call entry mechanism was implemented using SYSENTER/SYSEXIT instructions available on Pentium II+ processors. This article explores this new mechanism. Discussion is limited to x86 architecture and all source code listings are based on linux kernel 2.6.15.6."

すすすげええ

あ、アマチャンさんだったのか。

Plus a nice comment from Zed.

Google 流 C++ プログラムのデバック方法

This page is about the Nimrod programming language, which combines Lisp's power with Python's readability and C's performance.

Nimrod Programming Language - efficient, expressive, elegant, statically typed, imperative, procedural, object-oriented, functional and generic

Nimrod is a new statically typed, imperative programming language, that supports procedural, object oriented, functional and generic programming styles while remaining simple and efficient. A special feature that Nimrod inherited from Lisp is that Nimrod's abstract syntax tree (AST) is part of the specification - this allows a powerful macro system which allows domain specific languages. Nimrod is a compiled, garbage-collected systems programming language which has an excellent productivity/performance ratio. Nimrod's design focuses on the 3E: efficiency, expressiveness, elegance (in the order of priority)...

Nimrod is a new statically typed, imperative programming language, that supports procedural, object oriented, functional and generic programming styles while remaining simple and efficient. A special feature that Nimrod inherited from Lisp is that Nimrod's abstract syntax tree (AST) is part of the specification - this allows a powerful macro system which allows domain specific languages.

Paradigms

Programming Paradigms (CS107) introduces several programming languages, including C, Assembly, C++, Concurrent Programming, Scheme, and Python. The class aims to teach students how to write code for each of these individual languages and to understand the programming paradigms behind these languages.

Reglas para mejorar la programación en c

Tpl works with files, memory buffers and file descriptors so it's suitable for use as a file format, IPC message format or any scenario where you need to store and retrieve your data.

A data serialization library for C.

good coders code, great reuse

History, the C family of languages

I was reading an article on "Lambda the Ultimate" about Bruce Mills's book "A Theoretical Introduction to Programming," and in particular about the difference between "menu-lookup" writing of glue code, and "real programming", which the author defines as "to increase the computational capacity, to begin with a set of operations, and develop them into new operations that were not obviously implicit in the original set."

A really nice and introspective peek into Kragen's development as a programmer. Lots of nice insights.

一番右端の立っているビット位置を求める「ものすごい」コード

うーん全然わかんねー…

crazy!

"99% Statement Coverage, 95% Branch Coverage, Goal: 100% branch coverage by Dec 2009, Striving for 100% test coverage has been [their] most effective method for finding bugs."

I didn't know gcc could do that. Cool.

@newsycombinator: "SQLite: A Lesson In Low-Defect Software (review/summary w/ working source) http://bit.ly/qcfy0" (from http://twitter.com/newsycombinator/status/3550078799)

Cliff Click Jr.’s Blog

I just foolishly got caught in a You-Tube discussion on Java vs C performance. Foolish because You-Tube comments are a lousy way to present anything and because it's hard to keep the level of discourse scholarly. And foolish especially for me because I've had this discussion so many times and it always comes out the same way... so here's my attempt at distilling my arguments into something I can point people the *next* time I get caught in this silly discussion. Is Java faster than C/C++? The short answer is: it depends.

User 'carlh' posting a series of lectures.

Reddit lessons on programming C - with discussions!

A course written entirely on reddit.

ooc is a modern, object-oriented, functional-ish, high-level, low-level, sexy programming language. it's translated to pure C with a source-to-source compiler.

return ((tmp + (tmp >> 3)) & 030707070707) % 63;

(he's) writing a series of tutorials on x86 assembly for C programmers who are already familiar with many of the basics of programming and computing.

Im writing a series of tutorials on x86 assembly for C programmers who are already familiar with many of the basics of programming and computing. The assembly tutorials available online just arent doing it for me, and I need something organized the way I think, on the topics Im interested in, presented in a way which make comprehensive understanding easy. Ill do the work, go find the answers, and then drop everything here for you to enjoy.

すごい情報量だなー

uWSGI is a fast (pure C), self-healing, developer-friendly WSGI server, aimed for professional python webapps deployment and development.

Ullman Set: position[members[i]] = i

Ullman set, an excellent tutorial

This header file is called “bithacks.h” and it contains various macros for bit manipulations. I also wrote tests for all the macros in the “bithacks-test.c” program. The most beautiful part of “bithacks.h” is the “B8” macro that allows to write something like ” x = B8(10101010) ” and turns it into ” x = 170 ” (because 10101010 in binary is 170 in decimal). I have not yet added B16 and B32 macros but I will add them when I publish the article on advanced bithacks. The credit for the B8 idea goes to Tom Torfs who was the first to write it.

This is an introduction to JavaScript. There are plenty of these on the web, but most of them appear to be for non-programmers, teaching the building-blocks of programming as JavaScript uses them. And that's fine, because many people who have never programmed in their lives, find themselves needing a tiny bit of script for their web page, and need to start somewhere.

ず、ゲームを作るときにはどのようなゲームか頭の中に完成形がないといけないわけです 「かいわれ育成ゲーム」想像してみてください 水をやったり、肥料をやったり 登場人物は････天気は・・・・舞台は・・・・・

今回作るのはかいわれ育成ゲームです///

はい、色々想像できましたね？ それ全部忘れてください。そんな複雑なの嫌です

Ryan’s I like Unicorn because it’s Unix appears to have started a mini-meme of folks writing simple forking network servers in their language of choice. I’m really enjoying reading ‘em — they’re a sort of Rosetta Stone of network code — so I’m going to keep a running list of links here. Tell me about any I’ve missed (via email, comments, or twitter) and I’ll add ‘em to the list.

a . . . of Rosetta Stone of network code

There are a variety of C unit testing frameworks available however many of them are fairly complex and require the latest compiler technology. Some development requires the use of old compilers which makes it difficult to use some unit testing frameworks. In addition many unit testing frameworks assume the code being tested is an application or module that is targeted to the same platform that will ultimately execute the test. Because of this assumption many frameworks require the inclusion of standard C library headers in the code module being tested which may collide with the custom or incomplete implementation of the C library utilized by the code under test.

A lightweight library to simplify and generalize the process of writing unit tests for C applications.

A nice unit testing framework for C.

"A lightweight library to simplify and generalize the process of writing unit tests for C applications." Seems simple and uncomplicated.

There are a variety of C unit testing frameworks available however many of them are fairly complex and require the latest compiler technology. Some development requires the use of old compilers which makes it difficult to use some unit testing frameworks. In addition many unit testing frameworks assume the code being tested is an application or module that is targeted to the same platform that will ultimately execute the test. Because of this assumption many frameworks require the inclusion of standard C library headers in the code module being tested which may collide with the custom or incomplete implementation of the C library utilized by the code under test. Cmockery only requires a test application is linked with the standard C library which minimizes conflicts with standard C library headers. Also, Cmockery tries to avoid the use of some of the newer features of C compilers.

4.10 Recursion

Similar to 'Pride and Prejudice and Vampires', here is an adaptation of a famous book in the computer science canon, rewritten in the style of H.P. Lovecraft, specifically 'The Shadow Over Innsmouth' (which I'm coincidentally also reading on my iPhone).

I never heard of C Recursion till the day before I saw it for the first and– so far– last time. They told me the steam train was the thing to take to Arkham; and it was only at the station ticket-office, when I demurred at the high fare, that I learned about C Recursion. The shrewd-faced agent, whose speech shewed him to be no local man, made a suggestion that none of my other informants had offered. "You could take that old bus, I suppose," he said with a certain hesitation. "It runs through C Recursion, so the people don't like it. I never seen more'n two or three people on it– nobody but them C folks."

Brian W Kernighan & Dennis M Ritchie & HP Lovecraft

void Cthulhu (int Ia) { if (Ia/10) Cthulhu (IA/10); putchar // ftagn! (Ia % 10 + '0'); } // neblod zin!

How can C Programs be so Reliable?

I wrote a charming little utility for linux called getkey, that captures the keystrokes and displays them on the screen using OSD. Its called gekey and t has a couple of .c files and a hand crafted Makefile to go along with it. But I wanted to use the auto-tools (autoconf and automake) to create a configure script and a Makefile so that my utility could by installed like any other GNU tool using the famous:

lib

As an exercise, I want to write a Hello World program in C simple enough that I can disassemble it and be able to explain all of the assembly to myself. This should be easy, right? [...]

Nice article about compiling "Hello World" without libc under linux. Suprisingly deep digging necessary to get it to run properly.

"Hello, world" without libc

As an exercise, I want to write a Hello World program in C simple enough that I can disassemble it and be able to explain all of the assembly to myself.

lsコマンドのソースをいじくっていろいろ。 初歩的だけど確かに普段使ってるコマンドをいじくらせるのは面白いなぁ。

objdump

WEEK 12 -- 04/14/2010

Much ado about NULL: Exploiting a kernel NULL dereference

"This results in an increase from 500 requests/sec to 7000 requests/sec when using Sinatra+Thin+Epoll+Threads. That is pretty ill." -- Joe Damato

On top of all that, this patch helps with Ruby’s green threads, too. If the epoll_wait causes a Ruby event to fire and that event creates a Ruby thread, that Ruby thread gets an entire copy of the existing stack. Each time that thread is switched into and out of, that thread stack has to be memcpy’d into and out of place. Reducing those memcpys by ~800,000 bytes is a HUGE performance win. Want to learn more about threading implementations? Check out my threading models post: here. Fixing this turned out to be pretty simple. A six (6!!) line patch: * Speeds up GC by 2-3x because of the huge decrease in stack frame size. * Fixes an open bug in EventMachine where using threads with Epoll causes lots of slowness. The reason is that each thread will inherit an ~800,000 byte stack that gets copied in and out every context switch. * This results in an increase from 500 requests/sec to 7000 requests/sec when using Sinatra+Thin+Epoll+Threads. That is pretty ill.

l in all, a productive debugging session lasting about an hour. The result was a simple patch, with 2 big performance improvements.

IOCCC entry from 1990 that forms a dialogue between two characters in code.

Funny argument between a man and a woman written in c [for:twitter]

C Prog in the form of a conversation

Hilarious and amazing piece of code in C, it reads like a conversation between a couple, while it compiles well.

"[...] obviously, (char)lotte and (char*)lie are incompatible types..."

一些有用的代码收集

Frammenti di codice C per trucchetti

the bit twiddler

> google-perftoolsには次に挙げる4つのツールが含まれている。* 高速メモリアロケータ TCMalloc * ヒープチェッカー * ヒーププロファイラ * CPUプロファイラ

<GeDaMo> Use mmap rather than malloc if you want memory with nx disabled: http://androidbutnotparanoid.blogspot.com/2009/05/dynamically-generating-and-executing.html

Computer programs can generate machine code in memory and then execute it. This is the case with Sun's Java Hotspot VM, which dynamically compiles Java bytecode to native code to increase the VM's performance. Several exploits are based on buffer overflows to remotely inject machine code into memory and then jumping into it. Google released it's Chrome web browser featuring the V8 Javascript Engine, which greatly improved Javascript's performance by compiling Javascript to native code.

C のコーディング方法の良くまとまったガイドライン.

EE Times Japan

Tokyo Cabinet

A test with 200,000 sockets (note it's 100,000 pairs) showed a process size of 2MB, so far so good

The course which started it all! First presented on the social news website Reddit in October, 2009, this course has grown to over 6,000 subscribers. Start here if you have little or no programming background. Even experienced programmers may find new and interesting details as well as a helpful refresher in this course. Start at Lesson One, and proceed through each lesson one at a time. If you get stuck, simply follow the "discussion" links and myself and others will be glad to help you.

http://www.reddit.com/r/carlhprogramming/

There is a technique known as the ``Clockwise/Spiral Rule'' which enables any C programmer to parse in their head any C declaration!

""There is a technique known as the ``Clockwise/Spiral Rule'' which enables any C programmer to parse in their head any C declaration!

"Technique [...] which enables any C programmer to parse in their head any C declaration".

"There is a technique known as the ``Clockwise/Spiral Rule'' which enables any C programmer to parse in their head any C declaration!"

This course provides a thorough introduction to the C programming language, the workhorse of the UNIX operating system and lingua franca of embedded processors and micro-controllers. The first two weeks will cover basic syntax and grammar, and expose students to practical programming techniques. The remaining lectures will focus on more advanced concepts, such as dynamic memory allocation, concurrency and synchronization, UNIX signals and process control, library development and usage. Daily programming assignments and weekly laboratory exercises are required. Knowledge of C is highly marketable for summer internships, UROPs, and full-time positions in software and embedded systems development.

This course provides a thorough introduction to the C programming language, the workhorse of the UNIX operating system and lingua franca of embedded processors and micro-controllers. The first two weeks will cover basic syntax and grammar, and expose students to practical programming techniques. The remaining lectures will focus on more advanced concepts, such as dynamic memory allocation, concurrency and synchronization, UNIX signals and process control, library development and usage. Daily programming assignments and weekly laboratory exercises are required. Knowledge of C is highly marketable for summer internships, UROPs, and full-time positions in software and embedded systems development.

This course provides a thorough introduction to the C programming language, the workhorse of the UNIX operating system and lingua franca of embedded processors and micro-controllers. The first two weeks will cover basic syntax and grammar, and expose students to practical programming techniques. The remaining lectures will focus on more advanced concepts, such as dynamic memory allocation, concurrency and synchronization, UNIX signals and process control, library development and usage. Daily programming assignments and weekly laboratory exercises are required. Knowledge of C is highly marketable for summer internships, UROPs, and full-time positions in software and embedded systems development.