Questions tagged [pointers]
In computer science, a pointer is a programming language data type whose value refers directly to (or "points to") another value stored elsewhere in the computer memory using its address.
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C++ std::shared_ptr implementation
Took a shot at implementing std::shared_ptr, with a thread-safe refcount and weak count. Didn't do weak_ptr, I'm doing this for ...
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A memory leak-free RAII wrapper around two raw pointers
As a practice of implementing RAII-enabled class, I prepared a class called DynamicWallet that wraps around two raw pointers. I am well aware that using smart ...
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Reusable storage for array of objects V4
Here is a thirdfollow up on Reusable storage for array of objects, Reusable storage for array of objects V2 and Reusable storage for array of objects V3, taking into account the provided answers.
The ...
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Reusable storage for array of objects V3
Here is a second follow up on Reusable storage for array of objects and Reusable storage for array of objects V2, taking into account the provided answers.
The following code should be compliant at ...
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Reusable storage for array of objects V2
Here is a follow up on Reusable storage for array of objects, taking into account the provided answers.
The following code should be compliant at least with gcc, <...
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Reusable storage for array of objects
My goal is to have a memory pool non-template class that is used to store arrays of objects.
The same memory pool object must be reusable for a different array (difference size, different type and/or ...
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shared_ptr implementation code - first cut
I've written an implementation of shared_ptr. It doesn't support weak_ptr (yet) but below is the code. I'd appreciate any feedback, comments.
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Exercises 5.1 from K&R (function to read an integer value)
As written [above], getint treats a + or - not followed by a digit as a
valid representation ...
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C++ String Class Reimplementation
I started learning C++ about a week ago and I was hoping somebody can critique my code. I decided to implement my own basic String class just for the sake of applying all that I've learned about ...
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Implementing The Decorator Design Pattern in C++
I recently tried to implement the decorator design pattern in C++. Here is the code in full:
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Copying allocated data into std::map in a smart way [closed]
I come across a problem and I solved it. The solution works but I have some feelings that there is something wrong with my solution/code.
To be clear, let's assume that cars on the race track transmit
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simple connect four game
I made a simple connect four terminal game in C and was wondering if I could get feedback on it. I mainly want to know where pointers could have optimised my code, and if there are any major ...
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C# wrapper that binds to Rust FFI, for the purpose of running CavalierContours functions in Unity
I have attempted to write c# bindings for a Rust library. I have never worked with unmanned code / languages before. Superficially this code does work with no apparent bugs or memory leaks.
I want to ...
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Port Node and TreeBuilder from Python to C++
I am trying to port a TreeBuilder Python class to C++, keeping the structure as close as possible to the original. Here is a simplified Python version: https://onlinegdb.com/I4dg0hCtg
The purpose of ...
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Implementation of a shared pointer constructors and destructor
I am writing my simple shared pointer. I am asking to review existing functions (understand that my implementations is not full, e.g now operator*)
Review please ...
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Dynamic array type using void pointers C
I made my own dynamic array type using void pointers. I'd like to know what you think of my implementation. void pointers are nice but I fear they may be inefficient. The compiler cannot tell what ...
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Trim leading/trailing space in a string
I'm practicing C and wrote a function to trim leading/trailing spaces in a string:
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Rust: Splitting a mutable slice into disjoint, but non-contiguous subslices
For some context, this is inspired by my attempt to solve this SO question.
I have a mutably borrowed slice representing a 2D array, and I want to split the borrow such that I can access all the rows ...
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Readlines abstraction for Golang
I've just started learning Golang and was solving some problems which required me to read lines of text from a file. I decided to abstract away the reading part so that I can use Go's ...
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C void* Generic Hash Table
Some time ago I tried to make a generic linked list in pure C (no external libraries, only the C standard library) using void*s here. Building on top of that and ...
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201
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Intrusive smart pointer implementation
I have homework in college to implement intrusive smart pointers.
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C void* Generic Linked List
I once tried to make a generic linked list in pure C (no external libraries, only the C standard library) here using C macros. With the same restrictions as in the previous attempt, this time I'm ...
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Moveable Points - Update variable without Re-referencing variable? Event Subscriptions? (C#, Unity)
So I have this helper script that I use to move points around manually while debugging:
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Class that can only be created and deleter through smart pointer
I would like to expose a nullable referance of a "mesh" object, so I am returning a const pointer. However, I explicitly want to prevent anyone handling this from deleting the object. The ...
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Simple slab allocator in C
Here is the plan:
a slab takes up 1 page and it has PGSIZE / blocksize amount of blocks
the minimum blocksize is 8 bytes, otherwise the pointer to the next block ...
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1
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C Program - Camel Case (creates or splits camel case variables, methods and class names.)
I have written a program in C, which does the following operations:
creates or splits Camel Case variable, method, class names.
Input format
Each line of the input file will begin with an operation ...
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Virtual memory manager, physical memory manager and buddy allocator
I'm writing memory manager for my toy operating system and I would like to get some feedback. There is physical memory manager, which uses bitmap, virtual memory manager which uses buddy algorithm for ...
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Function to find the first pair where the sum zero. using 2-pointers approach
Here is the function called sumZero, where it should return the sum of any two numbers in the array to sum upto zero. where the array is a sorted array.
My approach:
Using 2 pointers approach, calling ...
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3
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C program that splits the string based on a character
I tried and made a program using my beginner knowledge of C to split a string into multiple sub strings. I just wondered how languages like Python and Javascript implemented the ...
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A simple logging library in C
I've created a simple logging library in C which I can use in my other projects. I wanted to get started in software development using the C language, and this is my first attempt at writing something ...
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Storing (and retrieving) functions by indexing them by address
I want to implement a "service" of callbacks, where subscribers register or unregister a callback. I was thinking about indexing the callbacks by the function address, so that to unregister ...
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Binary Search Tree that allows for duplicate elements - C++
I've recently made an attempt at creating a binary search tree class that allows for duplicate elements. I've included as many functions as I can think of so that I can use it later on.
I've tested ...
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display processes children
The following program uses a parent program to determine the PIDs of multiple child processes. A function is called to return them to a dynamic vector (with the children's pids, but also the elements ...
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Inheriting from a JSON converter class with schema definition through constructor
I wanted to convert C++ data structures to JSON with little code. More specifically, I wanted to convert C++ data structures to nlohmann JSON representation.
Project context: The goal is to use this ...
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275
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Slice function for C
I am trying to create a non-generic slice function. I want a 'view' not a copy.
The scan_from arg is so that successive calls ...
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std::unique_ptr adapter class template for libgit2 objects
I'm working on a personal project to build an open-source gui for git. I'm hoping to learn a lot from the project, and maybe produce something useful for folks as I do.
I'm making use of libgit2 to ...
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Improvement suggestions to my shared_ptr and weak_ptr implementations
Below is the entire code. I appreciate if, someone with more C++ experience can suggest if this can be improved further and if you notice any issues.
controlblock.hpp
...
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Low Level VBA Hacking - making Private functions Public
NEW: Download demo files
Not sure what to title this - essentially, inspired by RubberDuck's unit test engine, I've created a way to call private methods of standard modules in VBA. It also lets you ...
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C library implementing binary trees
This is my first attempt at writing a library in C. I have only included tree creation and in-order traversal function for now, but will expand to have more functions soon. I have three files, ...
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red black tree implementation in cpp
I am learning algorithms and trying to implement them in c++, I have chosen to try to implement a red-black tree due to its self-balancing properties and its ability to stop the worst case of O(n) ...
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Simple string manipulation in C (for small microcontrollers)
Although I have long experience of other languages, I've not used C until playing around with microcontrollers using the Arduino IDE. I'm a bit uncomfortable with my use of pointers in conjunction ...
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C++ Garbage Collector - Simple Automatic Memory Management
I made a general smart pointer which fixes the problems of loops between std::shared_ptr's. While use is simple, I feel that my code is inefficient and clumsy. Here ...
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Testing MRU-list vs. standard list
The task is to test the the benefits of a Move-To-Front Linked List vs. a standard Linked List. It was also meant to practice inheritance and pointers.
The standard functionality is in ...
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Left Shift/ Right Shift an array in C
I am trying to implement a Left shift/ Right Shift on arrays.
I was able to accomplish this using double loops.
Can the efficiency be improved?
This is the working code for LeftShift/RightShift which ...
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FizzBuzz, but with provided start and end of sequence, results stored in array, and a separate function to convert integers to strings
To learn C, I'm doing the traditional FizzBuzz challenge with extra restrictions:
The start and end of sequence is provided by the user
Instead of directly printing the results, the results must be ...
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Improving my implementation of a unique_ptr - PPP Stroustrup book
This question is an improvement of this one here: Implementing a unique_ptr - PPP Stroustrup exercise
Here's my new code, following the suggestions by @JDługosz.
I agree with the fact that T* ...
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Implementing a unique_ptr - PPP Stroustrup exercise
I'm doing the following exercise from PPP - Bjarne Stroustrup, Chapter 19, ex.10.
Implement a simple unique_ptr supporting only a constructor, destructor,...
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Hack machine language assembler as required for project 6 of Nand2Tetris
This is the implementation of the Assembler required to parse source code written in the Hack Machine Language and output it to a 16-bit binary file.
After writing one go in Swift, I decided I wanted ...
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Minimum of two floating-point numbers
I'm learning C and I just had the exercise to write a function that checks for the lower one of two floating-points.
So I thought, I either could use pointer and also return the pointer of the lower ...
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