Josh Wieder jwieder

Veritas et utilitas

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jwieder / readlink.c

Last active August 29, 2015 14:11

The readlink function gets the value of the symbolic link filename. The file name that the link points to is copied into buffer. This file name string is not null-terminated; readlink normally returns the number of characters copied. The size argument specifies the maximum number of characters to copy, usually the allocation size of buffer.

	ssize_t readlink (const char filename, char buffer, size_t size)

	char readlink_malloc (const char filename)
	{
	int size = 100;
	char *buffer = NULL;

	while (1)
	{
	buffer = (char *) xrealloc (buffer, size);

jwieder / dgb_hash.c

Last active August 29, 2015 14:11

Very simple implementation of a DGB hash function, written in C. Accepts one contiguous string, provided as a command line argument, as input. For example: #./dgb_hash plaintext

	#include <stdio.h>
	#include <string.h>

	int main(int argc, char* argv[])
	{
	if (argc != 2)
	{
	printf("\nCorrect usage is: gdb_script plaintext\n");
	return 1;
	}

jwieder / linked-list.c

Created December 16, 2014 22:01

Example of linked list creation in C. Note this is merely a struct and function, and does not include a main function or preprocessor imperatives. Used in Harvard's CS50 class.

	typedef struct node
	{
	int n;
	struct node *next;
	}
	node;

	bool search(int n, node* list)
	{
	node* ptr = list;

jwieder / vigenere.c

Last active August 29, 2015 14:10

Simple Vigenere cipher written in C

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <cs50.h>
	#include <ctype.h>

	int main(int argc, char *argv[])
	{
	if (argc != 2)
	{

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