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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1answer
47 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:
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4
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2answers
68 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?
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4
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1answer
67 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
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0answers
31 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
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2answers
90 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
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1answer
105 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
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2answers
74 views
1
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2answers
61 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
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1answer
23 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
120 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
160 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
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1answer
110 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 ...
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2answers
72 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
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2answers
178 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
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3answers
355 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.
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6
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1answer
141 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
128 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
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1answer
106 views
0
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1answer
125 views
Refactor C# unsafe method [closed]
I have the following two unsafe methods that I would like to refactor:
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4
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1answer
88 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
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3answers
318 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
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2answers
103 views
19
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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
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2answers
63 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
127 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
643 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
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4
votes
2answers
101 views
A clone_ptr<T> that does not require T to have a clone method
Here is my clone pointer template:
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2
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2answers
119 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 ...
4
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2answers
204 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
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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 ...
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2answers
177 views
2
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2answers
874 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, ...
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1answer
393 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 ...
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2answers
80 views
5
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1answer
310 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
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1answer
200 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
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3answers
169 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
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1answer
600 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 ...
4
votes
1answer
121 views
Smart pointer mark II - my answer to C++ 11 shared_ptr
I am writing this smart pointer as a learning exercise. Any feedback would be most appreciated.
Any flaws? Have I missed any test cases?
smart_pointer.hpp:
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6
votes
3answers
244 views
Reading, echoing, and returning integers in an array
I was wanting some clarification on my code, as I am new to pointers in C. I am trying to return an array from a simple function just so I can understand exactly what it is that I'm doing.
Here is ...
4
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1answer
142 views
Truncate 160-bit output from SHA-1 to 64-bit uint64_t
I'd like to truncate 160-bit output from SHA-1 to receive a (weaker) 64-bit digest.
It has been a while since I did the type of low-level C pointer arithmetic in the but-last line. Could you please ...
10
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3answers
2k views
Initializing and printing an array using pointers and dynamic allocation in C
I have written a code for basic array creation and printing it's values in C. I would appreciate comments on how it can be improved, and the industry standards.
One issue I'm encountering is having ...
4
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2answers
408 views
C++ smart pointers and classes
I've started learning C++ recently and want from what I've gathered smart pointers are the way to go when storing stuff on the free store. I want to make sure I've got the basic hang of C++(11) ...
3
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1answer
45 views
Returning the next node
What is considered to be a good programming practice for returning value from the function? For example, if we have a function in C named ...
2
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1answer
89 views
Pointer handle - absolute follow-up
This is a follow-up to:
Pointer handle - follow-up
Pointer class/handle
Please review my pointer class.
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4
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2answers
85 views
Pointer handle - follow-up
This is a followup to:
Pointer class/handle
Please review this pointer class.
...
2
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1answer
77 views
6
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1answer
69 views
Pointer handle - only allocates in stack
This is a pointer class of mine that I would like to have reviewed. Right now it only allocates in the stack and has no copy or move operations.
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2
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2answers
218 views
Yet another smart pointer implementation for learning
I based this implementation on CountedPtr in The C++ Standard Library book by Nicolai Josuttis (page 222) and also available online here.
I know that I can use the C++11 smart pointers but this is a ...
7
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4answers
17k views
Printing the contents of a string array using pointers
I'm currently studying C and I'm trying to just print the contents of a string array. I'm using pNames to point to the first char pointer and iterating from there.
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