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Newest 'c' Questions - Code Review Stack Exchange
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C is a general-purpose computer programming language used for operating systems, games, and other high performance work and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for use with the Unix operating system.
4,087 questions
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Shared-Memory Queue Implementation in C
Recently I am working on implementing a shared-memory based IPC message queue in C programming language on Linux system. A few design choices I've made include
The queue will have only 1 producer, ...
11
votes
3
answers
1k
views
Parsing HTTP headers in C
I'm new to C and just finished K&R. This is a code that I've written to parse headers of a HTTP request.
I want to know if my code:
Is safe? (after all this is C)
Does proper exit on failure? Are ...
10
votes
6
answers
2k
views
k-Nearest Neighbors algorithm in C
I've been learning C for a while, and I decided to make a simple kNN program. What can I do to improve the program?
Am I doing memory management right? Can the structure of the code be improved in ...
3
votes
0
answers
40
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library variant during application startup
I wrote some PoC for load library with best optimization version during application startup. The goal for it check in the _init function code checking by cpuid ...
7
votes
4
answers
1k
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Rot13 encryption with extra functionality using unix flags
I just wanted to check out options/unix flags and read from stdio through pipe. Is it any good? Where should I improve or use something else? Feedback would be much appreciated.
...
7
votes
7
answers
2k
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LinkedList data structure in C
Is my logic good? Are variable names fitting? Are there any memory leaks? Am I doing anything dangerous (this is C after all)?
Please feel free to criticize the code. I want to know if I'm writing C ...
9
votes
5
answers
2k
views
C method to determine whether a byte array is homogeneous
I engineered myself into a situation where I wanted to check whether a region of memory consists of identical bytes. I wanted to at least try to avoid the obvious solution of an O(n) loop, but also ...
2
votes
1
answer
172
views
Attempt at a Different Variation of the strstr(...) Function
I decided to work on an idea I had to 'optimize' the classic C function strstr.
Most of the implementations I had seen that did not make use of advanced ...
5
votes
4
answers
627
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Single Consumer Single Producer Wait-Free Zero-Copy Circular Message Queue
The title describes pretty well what the algorithm is for. It will be used for a realtime inter-process communication library that only uses shared memory for exchanging data. For realtime systems, it'...
4
votes
0
answers
73
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16x16 integer matrix transpose using SSE2 intrinsics in C
I was inspired by this and this to make a C function that would take an array of 16 __m128i, treat it as a matrix of 16x16 ...
2
votes
0
answers
87
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compile time, but Not inlined function in C and C++
We have a graphics library for the Ti84CE, which uses the 24bit eZ80. It has a 16bit 1555 screen, so we have a gfx_Darken function that will darken a 16bit 1555 ...
7
votes
2
answers
978
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Desperately seeking a hashing function
A recent CR exchange led me to dust off and adapt some code I'd written a few years ago. Long, long ago, when core meant ferro-magnetic memory cells, I spent an hour formulating a "simple" ...
5
votes
3
answers
1k
views
Arcane algorithm to find a keyword in a lookup table
This code is supposed to efficiently return the index+1 of a matching keyword from a lookup table of up to 31 keywords ...or 0 if the keyword is not found.
The line ...
- 205
4
votes
1
answer
500
views
Find a keyword in a lookup table
This code is supposed to efficiently return the index of a matching keyword from a lookup table or 0xF if the keyword is not found.
The line is a zero-terminated ...
- 205
2
votes
1
answer
85
views
Efficiently simulating a control sequence
I have a control problem that I am simulating in C. The premise is that I have some continuous-time signal s(t) and I am given some length-150 array ...
- 175
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