Added list structure.

Added a generic list structure. Some functions still need to be added.

source/handylist.h

@@ -0,0 +1,109 @@
+/*
+handystack.h
+Created By:
+	Andrew Lalis (andrewlalisofficial@gmail.com)
+	23 May 2017
+This file is free to use, as long as the above comment remains in the file.
+Please contact the author regarding bugs and/or feature requests.
+*/
+
+#ifdef LIST_TYPE
+
+#include "templates.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+/*
+Linked List:
+	The linked list is a list of items of arbitrary value that are linked via a pointer to the next element, and the last element has a null pointer. The list does not try to maintain any particular order.
+*/
+
+#define LIST_NODE TEMPLATE(LIST_TYPE,list)
+
+/*
+List structure:
+	Each list node will contain a piece of data, which is of an arbitrary type, and a pointer to the next element.
+*/
+
+typedef struct LIST_NODE LIST_NODE;
+
+struct LIST_NODE {
+	LIST_TYPE data;
+	LIST_NODE* next;
+};
+
+/*
+Size of List:
+	returns size of list.
+*/
+int TEMPLATE(size,LIST_NODE)(LIST_NODE* list){
+	int size = 0;
+	while (list != NULL){
+		size++;
+		list = list->next;
+	}
+	return size;
+}
+
+/*
+New list:
+	allocates memory for a new list item, and returns it.
+*/
+LIST_NODE* TEMPLATE(new,LIST_NODE)(LIST_TYPE data, LIST_NODE* next){
+	LIST_NODE *n = malloc(sizeof(LIST_NODE));
+	assert(n != NULL);
+	n->data = data;
+	n->next = next;
+	return n;
+}
+
+/*
+Free List:
+	de-allocates memory for a list, and all next items recursively.
+*/
+void TEMPLATE(free,LIST_NODE)(LIST_NODE* list){
+	if (list->next != NULL){
+		TEMPLATE(free,LIST_NODE)(list->next);
+	}
+	free(list);
+	list = NULL;
+}
+
+/*
+Add to the list:
+	Appends an item to the end of the list.
+*/
+void TEMPLATE(add,LIST_NODE)(LIST_TYPE data, LIST_NODE* list){
+	while (list->next != NULL){
+		list = list->next;
+	}
+	list->next = TEMPLATE(new,LIST_NODE)(data, NULL);
+}
+
+/*
+Insert List;
+	Inserts an item at the given index, so that the item can be retreived with the get function at that index.
+*/
+
+
+/*
+Get list item:
+	Returns the item in a specific index of the list, or fails.
+*/
+LIST_TYPE TEMPLATE(get,LIST_NODE)(int index, LIST_NODE* list){
+	int i = 0;
+	while (i < index){
+		if (list->next != NULL){
+			list = list->next;
+		} else {
+			printf("Index specified does not exist in list.\n");
+			exit(-1);
+		}
+		i++;
+	}
+	return list->data;
+}
+
+#endif

test.c

@@ -7,6 +7,20 @@ int main(int argc, char* argv[]){
 	#define STACK_TYPE double
 	#include "source/handystack.h"
 	double_stack s = new_double_stack();
+	push_double_stack(42.5, &s);
 	print_double_stack(s);
 	
+	#ifdef LIST_TYPE
+	#undef LIST_TYPE
+	#endif
+	#define LIST_TYPE float
+	#include "source/handylist.h"
+	float_list* l = new_float_list(5.0, NULL);
+	add_float_list(6.0, l);
+	add_float_list(7.0, l);
+	add_float_list(8.0, l);
+	printf("%d\n", size_float_list(l));
+	printf("%f\n", get_float_list(3, l));
+	free_float_list(l);
+	
 }