diff --git a/source/regex.h b/source/regex.h
index 219c2ef..c6c714f 100644
--- a/source/regex.h
+++ b/source/regex.h
@@ -1,8 +1,20 @@
+#ifndef REGEX_H
+#define REGEX_H
+
 #include "chad.h"
-#include <ctype.h>
+#include "vector.h"
 
 extern bool is_case_on;
 
+typedef struct {
+	char * str;
+	vector_t delta_table;	// <delta_t>
+	vector_t catch_table;	// <offshoot_t>
+	int accepting_state;
+} regex_t;
+
 extern regex_t * regex_compile(const char * const pattern);
-extern int       regex_match(const char * const pattern, const char * const  string, const int string_offset, int * match_offset_);
+extern bool regex_search(regex_t * regex, const char * const string);
 extern int       regex_free(regex_t * const regex);
+
+#endif