Fix memory leaks

api/noose.hpp

@@ -79,9 +79,24 @@ struct Inst {
   int idx;
 };
 
+struct Thread {
+  Inst *pc;
+  uint32_t saved[40]; /* $0 through $9 */
+};
+
+struct ThreadList {
+  Thread *t;
+  int n;
+};
+
 Exp *regex_to_ast(std::string pattern);
+void free_exp(Exp *exp);
 Inst *compile_ast(Exp *root);
 Inst *compile_regex(std::string pattern);
-int next_match(Inst *prog, ByteIterator *it, uint32_t *saved);
+int proglen(Inst *prog);
+void free_program(Inst *instructions);
+int next_match(Inst *prog, ByteIterator *it, uint32_t *saved, ThreadList *clist,
+               ThreadList *nlist);
+void print_program(Inst *program);
 
 #endif