--- a/c/regexParser/main.cc	Fri Aug 28 18:40:33 2015 +0900
+++ b/c/regexParser/main.cc	Fri Aug 28 20:36:16 2015 +0900
@@ -10,15 +10,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-typedef struct charClass {
-    unsigned char table[256];
-    struct utf8Range {
-        unsigned char *begin;
-        unsigned char *end;
-        struct utf8Range *next;
-    } *rangeList;
-} CharClass, *CharClassPtr;
-
 typedef struct node {
     unsigned char type;
     union value {
@@ -31,6 +22,16 @@
     struct node *right;
 } Node, *NodePtr;
 
+typedef struct charClass {
+    NodePtr nextState[256];
+    struct utf8Range {
+        unsigned char *begin;
+        unsigned char *end;
+        struct utf8Range *next;
+        NodePtr nextState;
+    } *rangeList;
+} CharClass, *CharClassPtr;
+
 unsigned char *ptr;
 unsigned char tokenType;
 int tokenValue;
@@ -38,12 +39,10 @@
 
 NodePtr charClass();
 NodePtr group();
-NodePtr orexp();
-NodePtr asterisk();
 NodePtr regex();
 NodePtr createNode(unsigned char,NodePtr,NodePtr);
-extern void token();
-extern NodePtr regexAtom();
+void token();
+NodePtr regexAtom();
 
 
 bool isLiteral(char c) {
@@ -55,6 +54,12 @@
     return true;
 }
 
+/**
+ * Create a node of regex parse tree.
+ *     tokenType
+ *     regexPosition(state)
+ *     stateTransitionTable
+ */
 NodePtr createNode(unsigned char character, NodePtr left, NodePtr right) {
     NodePtr n = (NodePtr)malloc(sizeof(Node));
     n->self = n;