C Preprocessor tricks, tips, and idiomsYou signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
Protothreads - Lightweight, Stackless Threads in C
Protothreads are extremely lightweight stackless threads designed for severely memory constrained systems, such as small embedded systems or wireless sensor network nodes. Protothreads provide linear code execution for event-driven systems implemented in C. Protothreads can be used with or without an underlying operating system to provide blocking event-handlers. Protothreads provide sequential fl
Pointers Are More Abstract Than You Might Expect in C
clanguage-lawyerpointer A pointer references a location in memory and dereferencing a pointer refers to the lookup of the value of the memory location the pointer references. The value of a pointer is a memory address. The C standard does not define the representation of a memory address. This is crucial since not every architecture makes use of the same memory addressing paradigm. Most modern arc
すごいC言語のマクロ __is_constexpr - Qiita
#define __is_constexpr(x) \ (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) #include<stdio.h> #define Def 10 #define __is_constexpr(x) \ (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) enum test{Enum}; int main(){ int Val = 10; const int Const_val = 10; int a = __is_constexpr(Val); int b = __is_constexpr(Const_val); int c = __is_constexpr(10); int d = __
Render Multimedia in Pure C
Update 2020: I’ve produced many more examples over the years (even more). In a previous article I demonstrated video filtering with C and a unix pipeline. Thanks to the ubiquitous support for the ridiculously simple Netpbm formats — specifically the “Portable PixMap” (.ppm, P6) binary format — it’s trivial to parse and produce image data in any language without image libraries. Video decoders and
K&R Malloc解説 - らじうむ覚書
mmapを使ってファイルベースの巨大なバッファを確保する話
C/C++プログラマのための開発ツール - Cybozu Inside Out | サイボウズエンジニアのブログ
C-Reduce
C-Reduce is a tool that takes a large C, C++, or OpenCL file that has a property of interest (such as triggering a compiler bug) and automatically produces a much smaller C/C++ file that has the same property. It is intended for use by people who discover and report bugs in compilers and other tools that process source code. C-Reduce is released under a BSD-like license. Publications and Presentat
GitHub - Keith-S-Thompson/how-to-c-response: A critique of "How to C in 2016"
Matt (whose web site does not mention his last name as far as I can tell) has written an article "How to C in 2016". It's been linked to from Reddit and from Hacker News; the latter is where I saw it. Update: Matt has been kind enough to add a link to this critique to his article. Update: A couple of people have found Matt's last name from other sites, but since he didn't choose to include it in h
Function overloading in C
add.c � Gh�U �Lh�U #include <stdio.h> #include <stdlib.h> #include <string.h> int addi(int a, int b) { return a + b; } char *adds(char *a, char *b) { char *res = malloc(strlen(a) + strlen(b) + 1); strcpy(res, a); strcat(res, b); return res; } #define add(a, b) _Generic(a, int: addi, char*: adds)(a, b) int main(void) { int a = 1, b = 2; printf("%d\n", add(a, b)); // 3 char *c = "hello ", *d = "worl
Being Sneaky in C
codersnotes Being Sneaky in C June 11th, 2015 I entered the 2014 Underhanded C Contest last year. Didn't win, but hey-ho what can you do. Still, I thought I'd post my entry and a write-up of it, in case anyone found it interesting. The goal this year was to write some code for a Twitter-like service. I'll spare the full details; if you want them go check the original contest post. Your function is
mill - Go-style concurrency in C
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Conal Elliott » The C language is purely functional
Inspirations & experiments, mainly about denotative/functional programming in Haskell There has been a scurry of reaction on twitter and reddit to Robert Fischer’s post saying that Scala is Not a Functional Programming Language. James Iry responded by saying that analogous reasoning leads to the conclusion that Erlang is Not Functional My first inclination was to suggest that Haskell, as commonly
10 C99 tricks
Here are ten interesting patterns and tricks I sometime use in my C code, some are well known, some not so much. I am sure all of them work with clang and gcc (after fixing the evetual typos). I didn’t try with MSVC, but except for no 1 and 5, I think it should also work. [edit]: Here is a link to the hacker news thread. [edit]: Maybe the title is a bit misleading, this is not strictly about C99.
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linuxカーネルで学ぶC言語のマクロ - Qiita
GitHub - antirez/kilo: A text editor in less than 1000 LOC with syntax highlight and search.
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Thomas Finch