[w3m-dev 02811] new regexp implementation

From: aito@fw.ipsj.or.jp

regex.h

@@ -1,44 +1,25 @@
-/* $Id: regex.h,v 1.3 2001/11/24 02:01:26 ukai Exp $ */
+/* $Id: regex.h,v 1.4 2002/01/10 04:55:07 ukai Exp $ */
 #define REGEX_MAX	64
 #define STORAGE_MAX	256
 
-#ifndef NULL
-#define NULL	0
-#endif				/* not NULL */
-
-#define	RE_NORMAL	0
-#define RE_MATCHMODE	0x07
-#define RE_ANY		0x01
-#define RE_WHICH	0x02
-#define RE_EXCEPT	0x04
-#define RE_ANYTIME	0x08
-#define RE_BEGIN	0x10
-#define RE_END		0x20
-#define RE_IGNCASE      0x40
-#define RE_ENDMARK	0x80
 
 typedef unsigned short longchar;
 
-
-typedef struct {
-
-    longchar *pattern;
-
+typedef struct regexchar {
+    union {
+	longchar *pattern;
+	struct regex *sub;
+    } p;
     unsigned char mode;
-
 } regexchar;
 
 
-typedef struct {
-
+typedef struct regex {
     regexchar re[REGEX_MAX];
-
     longchar storage[STORAGE_MAX];
-
     char *position;
-
     char *lposition;
-
+    struct regex *alt_regex;
 } Regex;