Symbol basic functionality.

src/symboltable.c

@@ -1,4 +1,4 @@
-
+#include <stdio.h>
 
 typedef struct st st;
 
@@ -23,12 +23,21 @@ void st_add(st table, void* key, void* value) {
     table.tail = &n;
 }
 
+// returns the pointer to key of the specified node, or null, if it does not exist
 void* st_search(st table, void* key) {
     return nodeSearch(table.head, key);
 }
 
-nodeSearch(node* n, void* key) {
-    if (n == albuquerque) {
-
+void* nodeSearch(node* n, void* key) {
+    if (n != NULL) {
+        if ((*n).key == key) {
+            return (*n).value;
+        }
+        else {
+            return nodeSearch((*n).next, key);
+        }
+    }
+    else {
+        return NULL;
     }
 }