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Results tagged with c
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user 8999
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.
-1
votes
Write a function reverse(s) that reverses the character string s. Use it to write a program ...
For your edification, here's a relatively efficient program which fits the exercise and imposes no specific limit in line length nor in number of lines.
A few notes:
The program assumes Linux-style l …
- 5,580
8
votes
Accepted
An Arena/Bump Allocator in C
Note, though, that with the rise of SIMD, many types are now more aligned than max_align_t (which cannot be changed for backward compatibility reason) and thus new C versions provide aligned_alloc instead … Handling of overflow requires some care: using a > b - c rather than a + c > b is better, though that may require proving c <= b first. …
- 5,580
10
votes
Implementing hash table
Your C code is not too bad, however you seem not to know much about hash-tables, and since you requested a performance review, I will focus on a brief (and incomplete) exploration of the various ways of … The best current implementation are Abseil's Swiss Table and Facebook's F14 (for a C++ reference) or Hashbrown (for a Rust reference); they are fairly advanced, complex, and highly-tuned. …
- 5,580
14
votes
Trim leading/trailing space in a string
Document the pre-conditions
C does not specify the encoding of its strings (Latin-1? JS-SHIFT? UTF-8?), so it's up to you to explain which encodings your function support. …
- 5,580
3
votes
Safe(r) / Easier Pointer Allocation Interface in C (ISO C11)
Terminology
There's nothing safe about ShrinkBlockSafe.
If the functionality is thought to be meaningful, I'd urge you to name it according to what the function actually does.
Reallocation
I do think …
- 5,580
17
votes
Accepted
Implementation of C Standard Library Function ntohl()
Unless you wish to optimize the code, with specialized swappers for various hosts orders, you are doing it wrong.
I invite you to check The Byte Order Fallacy by Rob Pike. The punch line: the byte or …
- 5,580
5
votes
Accepted
Implementation of itoa which allocates the string
Memory management and optimization is important.
I will avoid any stylistic remark and focus on this particular aspect of your query.
Memory
First of all, the first rule of optimization is to avoid …
- 5,580