diff --git a/src/jairee.h b/src/jairee.h
new file mode 100644
index 0000000..c2d185a
--- /dev/null
+++ b/src/jairee.h
@@ -0,0 +1,45 @@
+#ifndef JAIREE_H
+#define JAIREE_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#define JAIREE_DECODE_ERROR 0xFEFEFEFFu
+
+typedef uint32_t jairee_cp_t;
+
+typedef jairee_cp_t (*jairee_decode_t)(void * str, size_t offset);
+
+typedef struct jairee_match_s {
+    size_t start;
+    size_t end;
+    struct jairee_match_s * next;
+} jairee_match_t;
+
+typedef struct {
+    void * str;
+    size_t len;
+    jairee_decode_t decode;
+} jairee_string_t;
+
+typedef struct {
+    size_t todo;
+} jairee_re_t;
+
+typedef struct {
+    jairee_re_t * re;
+} jairee_state_t;
+
+jairee_re_t * jairee_compile(jairee_string_t * exp);
+
+jairee_match_t * jairee_match(jairee_string_t * str, size_t start_offset, jairee_string_t * exp);
+
+jairee_match_t * jairee_matchc(jairee_string_t * str, size_t start_offset, jairee_re_t * re);
+
+jairee_state_t * jairee_start(jairee_string_t * str, size_t start_offset, jairee_string_t * exp, jairee_match_t ** match);
+
+jairee_state_t * jairee_startc(jairee_string_t * str, size_t start_offset, jairee_re_t * re, jairee_match_t ** match);
+
+jairee_status_t jairee_step(jairee_state_t * state, size_t timeout);
+
+#endif