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The Underhanded C Contest
The official perfectly innocent web page for law-abiding good guys 2.3.16 Results of the 2015 Underhanded C Contest Posted at 9:55 am by XcottCraver We have judged all submissions, and are pleased to announce the runners up and winner of the 2015 Underhanded C Contest. This year we had over 40 submissions, and they were all of high quality. As a result, our list of runners up is pretty long. I wil
Overloading Macro on Number of Arguments
I have two macros FOO2 and FOO3: #define FOO2(x,y) ... #define FOO3(x,y,z) ... I want to define a new macro FOO as follows: #define FOO(x,y) FOO2(x,y) #define FOO(x,y,z) FOO3(x,y,z) But this doesn't work because macros do not overload on number of arguments. Without modifying FOO2 and FOO3, is there some way to define a macro FOO (using __VA_ARGS__ or otherwise) to get the same effect of dispatchi
GCC Explorer - an interactive take on compilation — Matt Godbolt’s blog
One of the things I spend a fair amount of time doing at work is compiling my C/C++ code and looking at the disassembly output. Call me old-fashioned, but I think sometimes the only way to really grok your code is to see what the processor will actually execute. Particularly with some of the newer features of C++11 — lambdas, move constructors, threading primitives etc — it’s nice to be able to se
Deep C
The document discusses the complexities of programming in C and C++, emphasizing that many programmers lack a deep understanding of the language, which leads to common errors. It uses code snippets to explore basic principles, limitations, and specific requirements of these languages, such as the necessity of including specific headers and explicit declarations. Interviewing candidates for C progr
Big Sky :: Re: サブドメインに任意の文字列が入るウェブアプリのローカル開発
サブドメインに任意の文字列が入るウェブアプリのローカル開発 - 冬通りに消え行く制服ガールは?夢物語にリアルを求めない。 - subtech サブドメインに任意の文字列が入るようなサービスをローカルで開発しようとすると、いろんなホストを /etc/hosts に書かないといけなくてすごく不便なので、なんとかしようと思っていたところ、id:hakobe932 先生に「それアレでできますよ」との御言葉を頂き、簡単なスクリプトを書きました。 http://subtech.g.hatena.ne.jp/cho45/20110804/1312389877 僕ならこうやるかも libcho45.c #define _GNU_SOURCE #include <dlfcn.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #incl
あらゆるCプログラマが未定義の動作について知るべきこと - YAMDAS現更新履歴
LLVM Project Blog: What Every C Programmer Should Know About Undefined Behavior #1/3 LLVM Project Blog: What Every C Programmer Should Know About Undefined Behavior #2/3 LLVM Project Blog: What Every C Programmer Should Know About Undefined Behavior #3/3 コンパイラ基盤 LLVM のブログで、未定義の動作という C 言語のダークサイドについての記事が3回シリーズで公開されている。 C 言語で未定義の動作を実行したら、「鼻から悪魔が飛び出しても文句が言えない」というジョークは有名で……いや、そんなのを知ってるのは年寄りくらいか（参考：nasa
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KariyaSiesta | C 言語向けのコーディングチェッカ