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.
11
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2answers
442 views
Beep-beep I'm a car factory
I have implemented to following generic factory in C++11 using smart pointers and I would like to get some feedback about it.
(Please note that I can't use C++14)
Due to company policies I have to ...
4
votes
1answer
37 views
Polymorphic pointers-to-functions whose parameters are void pointers as arguments in C
My question is about this sort of table that's simplified here. Often, I find myself putting this element, (int (*)(const void *, const void *))&strcmp for <...
2
votes
1answer
83 views
Pointer lists for a C++ garbage collector
The problem
My intention is to have a class A and class B. class B has a ...
1
vote
3answers
86 views
RadixSet - A growing-only Radix/Patricia Tree
I'm looking for a structure to store large amounts of strings (5k to 100k) and then test for existence of new strings against the previous inserted data, in the least possible amount of time (memory ...
4
votes
2answers
88 views
Doubly linked list reimplemented with smart pointers
I need some suggestions on my reimplementation of a doubly linked list with smart pointers since I'm new to smart pointers in C++.
I read some docs on smart pointers and found out there are ...
-3
votes
1answer
45 views
Creating a struct
Mat told me to create a struct
create a struct for the individual commands and arguments. It should
have something like the "executable" name, number of args and arg
list. Create a few ...
0
votes
1answer
25 views
C function for copying array into matrix
I want a matrix that can grow dynamically and build up a structure in RAM as input arrives from standard input och terminal (shell). First I tried with a matrix like ...
6
votes
2answers
133 views
An optional<T> implementation
This is an implementation of optional<T> from C++17, it is mostly standard conforming.
I'm looking for a review on efficiency, correctness and performance.
...
0
votes
1answer
62 views
Shell command line program
I have refactored a for loop into a function. I'm still a beginner at using C utility functions such as strtok, ...
4
votes
1answer
80 views
Avoiding pointers in this C++ linked list
As I know it is not good idea to have so many pointers in c++ code.
But I have written this simple implementation of linked list in c++ and there are many pointers in it, how can I improve that?
Also ...
1
vote
1answer
66 views
Operator Oveloading: “+” and “==” for two classes
I have one class Number (base class) and two child class Fraction and ...
6
votes
3answers
120 views
View programming pattern in C++ without raw pointers
I'm trying to achieve, for lack of a better term, a "view" pattern in C++. It's probably most comparable to "views" in the Database world, where one can make a query, and then perhaps aggregate the ...
-1
votes
1answer
52 views
&(array[index]) vs (array + index) [closed]
So I'm working with a function that returns a pointer to a list item. Right now, I'm using:
...
4
votes
2answers
78 views
Generate all permutations in C
I have written code for generating all the permutations in C as explained here. How can the code be optimized? Are there any memory leaks?
...
4
votes
1answer
117 views
(C++14) Handling state in C-style function pointer callbacks
I'm having some issues coming up with a sensible solution for using shared state in a C-style function pointer. I am using GLFW to handle my OpenGL context and have created a thin wrapper around all ...
2
votes
0answers
43 views
Transform and transpose byte[] of 32bit image data in 24bit array image data
I would like to know if someone can think about a better solution for doing this stuff.
I have an array of raw bitmap data in 32bit format (RGBA). I need to transform and transpose this array into a ...
2
votes
2answers
411 views
ShoppingCart and Item Classes
I've built a class for an e-commerce Item, and the ShoppingCart class for checkout functions.
The thing I'm most concerned ...
3
votes
1answer
126 views
Overloading operator ->* for smart pointers
I am implementing a smart pointer class template and I want to overload operator ->* (even if it’s rarely done). I came across Scott Meyer’s article Implementing ...
5
votes
2answers
90 views
1
vote
2answers
95 views
Read characters from stdin into an resizeable array
As first steps in C, I'm trying to write a program that reads from stdin into an array allocated on the free store, until an exclamation mark ! is entered. The ...
3
votes
1answer
24 views
Given a string, print another one without a given char
My aim is to write a C program (I must create a function) that, given a string and a character, returns another string without the given char value.
For example: ...
6
votes
2answers
137 views
Fixed-Size Memory Pool
I've been reading about Memory Pools since I came across them in the book Game Programming Complete 4th Edition, and I decided to try and spin my own since I didn't quite understand how the one they ...
4
votes
2answers
247 views
Memory management for Red-Black Tree
I've written this program yesterday, and I was reminded why I dreaded C++ before turning to Java: pointers and associated terms (like destructors, initializations and copy/move constructors) are ...
2
votes
1answer
154 views
Efficient C++ Resource Manager
This is my final attempt of making an efficient ResourceManager class, which takes care of allocating OpenGL objects (like Shader, Textures, Meshes, ...). It stores ...
-3
votes
2answers
75 views
Array to function to int arithmetic
I want to get the value of an integer from within a struct pointer. Simply: int cool = *(*(&(coolPtr->map)) + x); can this be simplified? The rest of the ...
1
vote
2answers
285 views
C++ Winsock HTTP Request Library
I'm trying to write a HTTP Request library for practice with Sockets and C++ in general. I created a seperate function to setup the struct needed to Connect() however it is now breaking and I cant ...
2
votes
3answers
665 views
DeepPtr: a deep-copying unique_ptr wrapper in C++
When using the pimple idiom it is necessary to represent your "impl" as a forward declared pointer in the header file. This necessitates a lot of boilerplate code to implement the rule of five.
...
6
votes
1answer
180 views
Random String Generation - Base36 and optimization
This is some fairly heavily optimized C#. Aside from reading like C++ code due to all of the pointers, does this pass sanity checks, and is there any way to improve it, while keeping its speed (or ...
7
votes
1answer
153 views
Cancellable futures, interaction with throwing destructors
I'm reinventing std::future from scratch (for an upcoming talk). I'd like to incorporate as many of the latest and most likely-to-succeed proposals as possible, and ...
4
votes
1answer
152 views
0
votes
1answer
127 views
Refactor C# unsafe method [closed]
I have the following two unsafe methods that I would like to refactor:
...
4
votes
1answer
106 views
Passing variable pointer as string to another function
With Delphi 7 I need to create a TStream variable and use/free it in another part of the code. Unfortunately it cannot be passed as "normal" parameter.
I created a ...
8
votes
3answers
379 views
Generic stack in C
I tried to implement a generic stack in C using void pointers and tried to keep it as simple as possible by delegating all responsibility to the caller of the ...
5
votes
2answers
107 views
21
votes
5answers
1k views
Inventorizing the universe
I recently started re-factoring a project I hadn't touched in many months.
The original purpose was to be an inventory management system for a game I played, Ogame. In this game you play inside a ...
3
votes
2answers
68 views
Linked list insertion
I have written the code below for inserting an element at the position specified by the user.
I have seen the code in multiple books, and they have always used two pointers in the function that ...
8
votes
2answers
142 views
Smart pointer or how not to leak a pointer
Wrote a couple of blog articles about smart pointers.
Unique Pointer
Shared Pointer
Constructors for Smart Pointers
So I suppose it time to get the result reviewed.
This is not supposed to be a ...
3
votes
2answers
930 views
Finding the min and max of an array, using a pointer
Modify the maxmin.c program so that the max min function uses a
pointer instead of an integer to keep track of the current position in
the array.
maxmin.c
...
4
votes
2answers
122 views
A clone_ptr<T> that does not require T to have a clone method
Here is my clone pointer template:
...
2
votes
2answers
121 views
Build a time struct for current time in UTC
I'm learning about time structs. Without assigning either in code or input routines I want the current time. Please help me refactor this, if it should be.
This code just tries to make a time struct ...
5
votes
2answers
298 views
Merge Sort in Perl
I'm new to Perl and have successfully written a merge sort program. I'll paste the entire program below, but would like mostly a review of the subroutines ...
15
votes
2answers
1k views
Can I buff up your file?
Here I have a method for reading the contents of a file into a buffer and returning whether or not it is successful.
Here is what I would like reviewed:
Speed: Am I reading in the file as fast as ...
-2
votes
2answers
190 views
2
votes
2answers
1k views
Implementation of unique_ptr and make_unique for aligned memory
I am working on a version of std::unique_ptr and std::make_unique for aligned memory. The purpose of this is vectorization, e.g.,...
1
vote
1answer
603 views
Casting between types for shared_ptr
I'm implementing an Entity-Component-System. Basically, an entity is a wrapper around an ID, a component is just a POD struct, and a System is a class that does work on components corresponding to the ...
0
votes
2answers
85 views
5
votes
1answer
554 views
Single LinkedList using smart pointers
In order to learn C++11, I propose to myself implement a simple single linked list using smart pointers. The idea was to cover the basic operations without leave any memory leak.
I came up with a ...
8
votes
1answer
242 views
Implementation of a new kind of smart pointer in C++
I'm tempted to write a new kind of smart pointer which, I believe, is less intrusive than boost::intrusive_ptr and has the same memory footprint.
The code for the ...
1
vote
3answers
178 views
Writing the function strend()
Due to being unable to ask a C programming language expert or advanced user in person, I'm posting this simple question about my C code. Today I was refreshing my C with exercise 5.4 of the C ...
3
votes
1answer
844 views
Remove odd valued nodes from linked list
The function remove_odd is to remove odd valued nodes (surprise!!) from the linked list head. The code is very long and cryptic but it seems to work.
Please help ...
