1 files changed, 37 insertions, 0 deletions

diff --git a/src/03/graph.c b/src/03/graph.c
index 2286101..808043b 100644
--- a/src/03/graph.c
+++ b/src/03/graph.c
@@ -2,12 +2,23 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+/**
+ * Creates a new Vertex for use in a Graph.
+ *
+ * @param label The label to attach to the node.
+ * @return Returns a new vertex
+ */
 Vertex *vertex_initialize(char label) {
   Vertex *item = malloc(sizeof(Vertex));
   item->label = label;
   return item;
 };
 
+/**
+ * Initializes a new Graph
+ *
+ * @return Returns a new instance of a Graph.
+ */
 Graph *graph_initialize(void) {
   Graph *item = malloc(sizeof(Graph));
   for (int i = 0; i < 128; ++i)
@@ -15,16 +26,42 @@ Graph *graph_initialize(void) {
   return item;
 }
 
+/**
+ * Inserts a new vertex into a graph with the provided label.
+ *
+ * @param graph The graph to insert a new vertex into
+ * @param label The label to apply to the new vertex.
+ * @return Returns the new vertex
+ */
 Vertex *graph_add_vertex(Graph *graph, char label) {
   Vertex *item = vertex_initialize(label);
   graph->vertices[(int)label] = item;
   return item;
 }
 
+/**
+ * Updates a adjacency matrix to indicate that an edge exists
+ * between two vertexes.
+ *
+ * @param graph The graph to modify.
+ * @param a The vertex that points to vertex b.
+ * @param b The vertex that vertex a points to.
+ */
 void graph_add_edge(Graph *graph, Vertex *a, Vertex *b) {
   graph->edges[a->label][b->label] = true;
 }
 
+/**
+ * Returns true or false to specify if vertex `a`
+ * in a graph is connected to vertex `b` in the same
+ * graph.
+ *
+ * @param graph The graph to investigate
+ * @param a The starting vertext to check
+ * @param b The vertex that vertex a might be pointing at.
+ * @return Returns true if an edge exists between the two vertexes otherwise
+ * false.
+ */
 bool graph_has_edge(Graph *graph, Vertex *a, Vertex *b) {
   return graph->edges[a->label][b->label];
 }