Add exception_init and exception_free

src/exception_t.c

@@ -1 +1,16 @@
+#include <stdlib.h>
+
 #include "exception_t.h"
+
+exception_t*
+exception_init() {
+  exception_t *e = (exception_t*) malloc(sizeof(exception_t));
+  e->type = NO_ERROR;
+  e->msg = NULL;
+  return e;
+}
+
+void
+exception_free(exception_t *e) {
+  free(e);
+}

src/exception_t.h

@@ -15,6 +15,12 @@ typedef struct exception_t {
   char *msg;
 } exception_t;
 
+exception_t*
+exception_init();
+
+void
+exception_free(exception_t *e);
+
 char*
 exception_str(exception_t *e);