initial import
diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..e7e7c75
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,46 @@
+/* Capstone Disassembler Engine */
+/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013> */
+
+#ifndef __CS_UTILS_H__
+#define __CS_UTILS_H__
+
+#include <stdbool.h>
+
+typedef struct Pair {
+ char *str;
+ unsigned num;
+} Pair;
+
+// map instruction to its characteristics
+typedef struct insn_map {
+ unsigned int id;
+ unsigned int mapid;
+ unsigned int regs_use[32]; // list of implicit registers used by this instruction
+ unsigned int regs_mod[32]; // list of implicit registers modified by this instruction
+ unsigned int groups[8]; // list of group this instruction belong to
+ bool branch; // branch instruction?
+ bool indirect_branch; // indirect branch instruction?
+} insn_map;
+
+bool str_in_list(char **list, char *s);
+
+int insn_find(insn_map *m, unsigned int max, unsigned int id);
+
+// map id to string
+typedef struct name_map {
+ unsigned int id;
+ char *name;
+} name_map;
+
+// map a name to its ID
+// return 0 if not found
+int name2id(name_map* map, int max, char *name);
+
+// reverse mapid to id
+// return 0 if not found
+unsigned int insn_reverse_id(insn_map *insns, unsigned int max, unsigned int id);
+
+#define ARR_SIZE(a) (sizeof(a)/sizeof(a[0]))
+
+#endif
+