Update.

	* posix/regex.c: Implement multibyte character handling.
	Patch by Isamu Hasegawa <isamu@yamato.ibm.co.jp>.

4 files changed, 1857 insertions, 268 deletions

diff --git a/ChangeLog b/ChangeLog
index 3058a735ad..7c182e0dc1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2001-02-02  Ulrich Drepper  <drepper@redhat.com>
 
+	* posix/regex.c: Implement multibyte character handling.
+	Patch by Isamu Hasegawa <isamu@yamato.ibm.co.jp>.
+
 	* string/tst-svc.input: Add two more test cases.
 	* string/tst-svc.expect: Modify to reflect new test cases.
 
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index e4739ca60e..3e5e7b09d3 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,7 @@
+2001-02-02  Ulrich Drepper  <drepper@redhat.com>
+
+	* Versions: Remove __pthread_initialize_minimal.
+
 2001-02-01  Ulrich Drepper  <drepper@redhat.com>
 
 	* Makefile: Add rules to build crti.o and make it being used in
diff --git a/linuxthreads/Versions b/linuxthreads/Versions
index 8f38b9b604..3541002ad5 100644
--- a/linuxthreads/Versions
+++ b/linuxthreads/Versions
@@ -151,8 +151,5 @@ libpthread {
 
     # Extensions.
     pthread_yield;
-
-    # New internal function.
-    __pthread_initialize_minimal;
   }
 }
diff --git a/posix/regex.c b/posix/regex.c
index 440194a201..6a8c899e97 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -2,7 +2,7 @@
    version 0.12.
    (Implements POSIX draft P1003.2/D11.2, except for some of the
    internationalization features.)
-   Copyright (C) 1993-1999, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1993-1999, 2000, 2001 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public License as
@@ -56,6 +56,23 @@
 # include <wctype.h>
 #endif
 
+/* This is for multi byte string support.  */
+#ifdef MBS_SUPPORT
+# define CHAR_TYPE wchar_t
+# define US_CHAR_TYPE wchar_t/* unsigned character type */
+# define COMPILED_BUFFER_VAR wc_buffer
+# define OFFSET_ADDRESS_SIZE 1 /* the size which STORE_NUMBER macro use */
+# define PUT_CHAR(c) printf ("%C", c) /* Should we use wide stream??  */
+# define TRUE 1
+# define FALSE 0
+#else
+# define CHAR_TYPE char
+# define US_CHAR_TYPE unsigned char /* unsigned character type */
+# define COMPILED_BUFFER_VAR bufp->buffer
+# define OFFSET_ADDRESS_SIZE 2
+# define PUT_CHAR(c) putchar (c)
+#endif /* MBS_SUPPORT */
+
 #ifdef _LIBC
 /* We have to keep the namespace clean.  */
 # define regfree(preg) __regfree (preg)
@@ -84,6 +101,7 @@
 # include <locale/localeinfo.h>
 # include <locale/elem-hash.h>
 # include <langinfo.h>
+# include <locale/coll-lookup.h>
 #endif
 
 /* This is for other GNU distributions with internationalized messages.  */
@@ -414,6 +432,11 @@ typedef enum
         /* Followed by one byte giving n, then by n literal bytes.  */
   exactn,
 
+#ifdef MBS_SUPPORT
+	/* Same as exactn, but contains binary data.  */
+  exactn_bin,
+#endif
+
         /* Matches any (more or less) character.  */
   anychar,
 
@@ -423,6 +446,13 @@ typedef enum
            are ordered low-bit-first.  A character is in the set if its
            bit is 1.  A character too large to have a bit in the map is
            automatically not in the set.  */
+        /* ifdef MBS_SUPPORT, following element is length of character
+	   classes, length of collating symbols, length of equivalence
+	   classes, length of character ranges, and length of characters.
+	   Next, character class element, collating symbols elements,
+	   equivalence class elements, range elements, and character
+	   elements follow.
+	   See regex_compile function.  */
   charset,
 
         /* Same parameters as charset, but match any character that is
@@ -472,6 +502,7 @@ typedef enum
 
         /* Followed by two-byte relative address of place to resume at
            in case of failure.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   on_failure_jump,
 
         /* Like on_failure_jump, but pushes a placeholder instead of the
@@ -480,6 +511,7 @@ typedef enum
 
         /* Throw away latest failure point and then jump to following
            two-byte relative address.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   pop_failure_jump,
 
         /* Change to pop_failure_jump if know won't have to backtrack to
@@ -489,6 +521,7 @@ typedef enum
            sure that there is no use backtracking out of repetitions
            already matched, then we change it to a pop_failure_jump.
            Followed by two-byte address.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   maybe_pop_jump,
 
         /* Jump to following two-byte address, and push a dummy failure
@@ -496,6 +529,7 @@ typedef enum
            is made to use it for a failure.  A `+' construct makes this
            before the first repeat.  Also used as an intermediary kind
            of jump when compiling an alternative.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   dummy_failure_jump,
 
 	/* Push a dummy failure point and continue.  Used at the end of
@@ -504,15 +538,18 @@ typedef enum
 
         /* Followed by two-byte relative address and two-byte number n.
            After matching N times, jump to the address upon failure.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   succeed_n,
 
         /* Followed by two-byte relative address, and two-byte number n.
            Jump to the address N times, then fail.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   jump_n,
 
         /* Set the following two-byte relative address to the
            subsequent two-byte number.  The address *includes* the two
            bytes of number.  */
+        /* ifdef MBS_SUPPORT, the size of address is 1.  */
   set_number_at,
 
   wordchar,	/* Matches any word-constituent character.  */
@@ -541,42 +578,63 @@ typedef enum
 /* Common operations on the compiled pattern.  */
 
 /* Store NUMBER in two contiguous bytes starting at DESTINATION.  */
+/* ifdef MBS_SUPPORT, we store NUMBER in 1 element.  */
 
-#define STORE_NUMBER(destination, number)				\
+#ifdef MBS_SUPPORT
+# define STORE_NUMBER(destination, number)				\
+  do {									\
+    *(destination) = (US_CHAR_TYPE)(number);				\
+  } while (0)
+#else
+# define STORE_NUMBER(destination, number)				\
   do {									\
     (destination)[0] = (number) & 0377;					\
     (destination)[1] = (number) >> 8;					\
   } while (0)
+#endif /* MBS_SUPPORT */
 
 /* Same as STORE_NUMBER, except increment DESTINATION to
    the byte after where the number is stored.  Therefore, DESTINATION
    must be an lvalue.  */
+/* ifdef MBS_SUPPORT, we store NUMBER in 1 element.  */
 
 #define STORE_NUMBER_AND_INCR(destination, number)			\
   do {									\
     STORE_NUMBER (destination, number);					\
-    (destination) += 2;							\
+    (destination) += OFFSET_ADDRESS_SIZE;				\
   } while (0)
 
 /* Put into DESTINATION a number stored in two contiguous bytes starting
    at SOURCE.  */
+/* ifdef MBS_SUPPORT, we store NUMBER in 1 element.  */
 
-#define EXTRACT_NUMBER(destination, source)				\
+#ifdef MBS_SUPPORT
+# define EXTRACT_NUMBER(destination, source)				\
+  do {									\
+    (destination) = *(source);						\
+  } while (0)
+#else
+# define EXTRACT_NUMBER(destination, source)				\
   do {									\
     (destination) = *(source) & 0377;					\
     (destination) += SIGN_EXTEND_CHAR (*((source) + 1)) << 8;		\
   } while (0)
+#endif
 
 #ifdef DEBUG
-static void extract_number _RE_ARGS ((int *dest, unsigned char *source));
+static void extract_number _RE_ARGS ((int *dest, US_CHAR_TYPE *source));
 static void
 extract_number (dest, source)
     int *dest;
-    unsigned char *source;
+    US_CHAR_TYPE *source;
 {
+#ifdef MBS_SUPPORT
+  *dest = *source;
+#else
   int temp = SIGN_EXTEND_CHAR (*(source + 1));
   *dest = *source & 0377;
   *dest += temp << 8;
+#endif
 }
 
 # ifndef EXTRACT_MACROS /* To debug the macros.  */
@@ -592,19 +650,19 @@ extract_number (dest, source)
 #define EXTRACT_NUMBER_AND_INCR(destination, source)			\
   do {									\
     EXTRACT_NUMBER (destination, source);				\
-    (source) += 2; 							\
+    (source) += OFFSET_ADDRESS_SIZE; 					\
   } while (0)
 
 #ifdef DEBUG
 static void extract_number_and_incr _RE_ARGS ((int *destination,
-					       unsigned char **source));
+					       US_CHAR_TYPE **source));
 static void
 extract_number_and_incr (destination, source)
     int *destination;
-    unsigned char **source;
+    US_CHAR_TYPE **source;
 {
   extract_number (destination, *source);
-  *source += 2;
+  *source += OFFSET_ADDRESS_SIZE;
 }
 
 # ifndef EXTRACT_MACROS
@@ -678,13 +736,13 @@ print_fastmap (fastmap)
 
 void
 print_partial_compiled_pattern (start, end)
-    unsigned char *start;
-    unsigned char *end;
+    US_CHAR_TYPE *start;
+    US_CHAR_TYPE *end;
 {
   int mcnt, mcnt2;
-  unsigned char *p1;
-  unsigned char *p = start;
-  unsigned char *pend = end;
+  US_CHAR_TYPE *p1;
+  US_CHAR_TYPE *p = start;
+  US_CHAR_TYPE *pend = end;
 
   if (start == NULL)
     {
@@ -713,11 +771,23 @@ print_partial_compiled_pattern (start, end)
           do
 	    {
               putchar ('/');
-	      putchar (*p++);
+	      PUT_CHAR (*p++);
             }
           while (--mcnt);
           break;
 
+#ifdef MBS_SUPPORT
+	case exactn_bin:
+	  mcnt = *p++;
+	  printf ("/exactn_bin/%d", mcnt);
+          do
+	    {
+	      printf("/%x", *p++);
+            }
+          while (--mcnt);
+          break;
+#endif /* MBS_SUPPORT */
+
 	case start_memory:
           mcnt = *p++;
           printf ("/start_memory/%d/%d", mcnt, *p++);
@@ -739,6 +809,45 @@ print_partial_compiled_pattern (start, end)
 	case charset:
         case charset_not:
           {
+#ifdef MBS_SUPPORT
+	    int i, length;
+	    wchar_t *workp = p;
+	    printf ("/charset [%s",
+	            (re_opcode_t) *(workp - 1) == charset_not ? "^" : "");
+	    p += 5;
+	    length = *workp++; /* the length of char_classes */
+	    for (i=0 ; i<length ; i++)
+	      printf("[:%x:]", *p++);
+	    length = *workp++; /* the length of collating_symbol */
+	    for (i=0 ; i<length ;)
+	      {
+		printf("[.");
+		while(*p != 0)
+		  PUT_CHAR((i++,*p++));
+		i++,p++;
+		printf(".]");
+	      }
+	    length = *workp++; /* the length of equivalence_class */
+	    for (i=0 ; i<length ;)
+	      {
+		printf("[=");
+		while(*p != 0)
+		  PUT_CHAR((i++,*p++));
+		i++,p++;
+		printf("=]");
+	      }
+	    length = *workp++; /* the length of char_range */
+	    for (i=0 ; i<length ; i++)
+	      {
+		wchar_t range_start = *p++;
+		wchar_t range_end = *p++;
+		printf("%C-%C", range_start, range_end);
+	      }
+	    length = *workp++; /* the length of char */
+	    for (i=0 ; i<length ; i++)
+	      printf("%C", *p++);
+	    putchar (']');
+#else
             register int c, last = -100;
 	    register int in_range = 0;
 
@@ -776,6 +885,7 @@ print_partial_compiled_pattern (start, end)
 	    putchar (']');
 
 	    p += 1 + *p;
+#endif /* MBS_SUPPORT */
 	  }
 	  break;
 
@@ -900,6 +1010,7 @@ print_partial_compiled_pattern (start, end)
 
 	case wordend:
 	  printf ("/wordend");
+	  break;
 
 # ifdef emacs
 	case before_dot:
@@ -962,9 +1073,10 @@ void
 print_compiled_pattern (bufp)
     struct re_pattern_buffer *bufp;
 {
-  unsigned char *buffer = bufp->buffer;
+  US_CHAR_TYPE *buffer = (US_CHAR_TYPE*) bufp->buffer;
 
-  print_partial_compiled_pattern (buffer, buffer + bufp->used);
+  print_partial_compiled_pattern (buffer, buffer
+				  + bufp->used / sizeof(US_CHAR_TYPE));
   printf ("%ld bytes used/%ld bytes allocated.\n",
 	  bufp->used, bufp->allocated);
 
@@ -992,9 +1104,9 @@ print_compiled_pattern (bufp)
 
 void
 print_double_string (where, string1, size1, string2, size2)
-    const char *where;
-    const char *string1;
-    const char *string2;
+    const CHAR_TYPE *where;
+    const CHAR_TYPE *string1;
+    const CHAR_TYPE *string2;
     int size1;
     int size2;
 {
@@ -1007,13 +1119,13 @@ print_double_string (where, string1, size1, string2, size2)
       if (FIRST_STRING_P (where))
         {
           for (this_char = where - string1; this_char < size1; this_char++)
-            putchar (string1[this_char]);
+	    PUT_CHAR (string1[this_char]);
 
           where = string2;
         }
 
       for (this_char = where - string2; this_char < size2; this_char++)
-        putchar (string2[this_char]);
+        PUT_CHAR (string2[this_char]);
     }
 }
 
@@ -1039,6 +1151,88 @@ printchar (c)
 
 #endif /* not DEBUG */
 
+#ifdef MBS_SUPPORT
+/* This  convert a multibyte string to a wide character string.
+   And write their correspondances to offset_buffer(see below)
+   and write whether each wchar_t is binary data to is_binary.
+   This assume invalid multibyte sequences as binary data.
+   We assume offset_buffer and is_binary is already allocated
+   enough space.  */
+size_t
+convert_mbs_to_wcs (dest, src, len, offset_buffer, is_binary)
+     CHAR_TYPE *dest;
+     const unsigned char* src;
+     size_t len; /* the length of multibyte string.  */
+
+     /* It hold correspondances between src(char string) and
+	dest(wchar_t string) for optimization.
+	e.g. src  = "xxxyzz"
+             dest = {'X', 'Y', 'Z'}
+	      (each "xxx", "y" and "zz" represent one multibyte character
+	       corresponding to 'X', 'Y' and 'Z'.)
+	  offset_buffer = {0, 0+3("xxx"), 0+3+1("y"), 0+3+1+2("zz")}
+	  	        = {0, 3, 4, 6}
+     */
+     int *offset_buffer;
+     int *is_binary;
+{
+  wchar_t *pdest = dest;
+  const unsigned char *psrc = src;
+  size_t wc_count = 0;
+
+  if (MB_CUR_MAX == 1)
+    { /* We don't need conversion.  */
+      for ( ; wc_count < len ; ++wc_count)
+	{
+	  *pdest++ = *psrc++;
+	  is_binary[wc_count] = FALSE;
+	  offset_buffer[wc_count] = wc_count;
+	}
+      offset_buffer[wc_count] = wc_count;
+    }
+  else
+    {
+      /* We need conversion.  */
+      mbstate_t mbs;
+      int consumed;
+      size_t mb_remain = len;
+      size_t mb_count = 0;
+
+      /* Initialize the conversion state.  */
+      memset (&mbs, 0, sizeof (mbstate_t));
+
+      offset_buffer[0] = 0;
+      for( ; mb_remain > 0 ; ++wc_count, ++pdest, mb_remain -= consumed,
+	     psrc += consumed)
+	{
+	  consumed = mbrtowc (pdest, psrc, mb_remain, &mbs);
+
+	  if (consumed <= 0)
+	    /* failed to convert. maybe src contains binary data.
+	       So we consume 1 byte manualy.  */
+	    {
+	      *pdest = *psrc;
+	      consumed = 1;
+	      is_binary[wc_count] = TRUE;
+	    }
+	  else
+	    is_binary[wc_count] = FALSE;
+	  /* In sjis encoding, we use yen sign as escape character in
+	     place of reverse solidus. So we convert 0x5c(yen sign in
+	     sjis) to not 0xa5(yen sign in UCS2) but 0x5c(reverse
+	     solidus in UCS2).  */
+	  if (consumed == 1 && (int) *psrc == 0x5c && (int) *pdest == 0xa5)
+	    *pdest = (wchar_t) *psrc;
+
+	  offset_buffer[wc_count + 1] = mb_count += consumed;
+	}
+    }
+
+  return wc_count;
+}
+
+#endif /* MBS_SUPPORT */
+
 /* Set by `re_set_syntax' to the current regexp syntax to recognize.  Can
    also be assigned to arbitrarily: each pattern buffer stores its own
    syntax, so it can be changed between regex compilations.  */
@@ -1220,7 +1414,7 @@ long int re_max_failures = 2000;
 
 union fail_stack_elt
 {
-  unsigned char *pointer;
+  US_CHAR_TYPE *pointer;
   long int integer;
 };
 
@@ -1245,7 +1439,7 @@ int re_max_failures = 2000;
 
 union fail_stack_elt
 {
-  unsigned char *pointer;
+  US_CHAR_TYPE *pointer;
   int integer;
 };
 
@@ -1327,7 +1521,7 @@ typedef struct
    Assumes the variable `fail_stack'.  Probably should only
    be called from within `PUSH_FAILURE_POINT'.  */
 #define PUSH_FAILURE_POINTER(item)					\
-  fail_stack.stack[fail_stack.avail++].pointer = (unsigned char *) (item)
+  fail_stack.stack[fail_stack.avail++].pointer = (US_CHAR_TYPE *) (item)
 
 /* This pushes an integer-valued item onto the failure stack.
    Assumes the variable `fail_stack'.  Probably should only
@@ -1484,12 +1678,11 @@ typedef struct
 
    Also assumes the variables `fail_stack' and (if debugging), `bufp',
    `pend', `string1', `size1', `string2', and `size2'.  */
-
 #define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\
 {									\
   DEBUG_STATEMENT (unsigned failure_id;)				\
   active_reg_t this_reg;						\
-  const unsigned char *string_temp;					\
+  const US_CHAR_TYPE *string_temp;					\
 									\
   assert (!FAIL_STACK_EMPTY ());					\
 									\
@@ -1508,13 +1701,13 @@ typedef struct
      saved NULL, thus retaining our current position in the string.  */	\
   string_temp = POP_FAILURE_POINTER ();					\
   if (string_temp != NULL)						\
-    str = (const char *) string_temp;					\
+    str = (const CHAR_TYPE *) string_temp;				\
 									\
   DEBUG_PRINT2 ("  Popping string %p: `", str);				\
   DEBUG_PRINT_DOUBLE_STRING (str, string1, size1, string2, size2);	\
   DEBUG_PRINT1 ("'\n");							\
 									\
-  pat = (unsigned char *) POP_FAILURE_POINTER ();			\
+  pat = (US_CHAR_TYPE *) POP_FAILURE_POINTER ();			\
   DEBUG_PRINT2 ("  Popping pattern %p:\n", pat);			\
   DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend);			\
 									\
@@ -1534,10 +1727,10 @@ typedef struct
 	DEBUG_PRINT2 ("      info: %p\n",				\
 		      reg_info[this_reg].word.pointer);			\
 									\
-	regend[this_reg] = (const char *) POP_FAILURE_POINTER ();	\
+	regend[this_reg] = (const CHAR_TYPE *) POP_FAILURE_POINTER ();	\
 	DEBUG_PRINT2 ("      end: %p\n", regend[this_reg]);		\
 									\
-	regstart[this_reg] = (const char *) POP_FAILURE_POINTER ();	\
+	regstart[this_reg] = (const CHAR_TYPE *) POP_FAILURE_POINTER ();\
 	DEBUG_PRINT2 ("      start: %p\n", regstart[this_reg]);		\
       }									\
   else									\
@@ -1555,7 +1748,6 @@ typedef struct
   DEBUG_STATEMENT (nfailure_points_popped++);				\
 } /* POP_FAILURE_POINT */
 
-
 
 /* Structure for per-register (a.k.a. per-group) information.
    Other register information, such as the
@@ -1613,7 +1805,7 @@ typedef union
   while (0)
 
 /* Registers are set to a sentinel when they haven't yet matched.  */
-static char reg_unset_dummy;
+static CHAR_TYPE reg_unset_dummy;
 #define REG_UNSET_VALUE (&reg_unset_dummy)
 #define REG_UNSET(e) ((e) == REG_UNSET_VALUE)
 
@@ -1622,41 +1814,65 @@ static char reg_unset_dummy;
 static reg_errcode_t regex_compile _RE_ARGS ((const char *pattern, size_t size,
 					      reg_syntax_t syntax,
 					      struct re_pattern_buffer *bufp));
-static void store_op1 _RE_ARGS ((re_opcode_t op, unsigned char *loc, int arg));
-static void store_op2 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
+static void store_op1 _RE_ARGS ((re_opcode_t op, US_CHAR_TYPE *loc, int arg));
+static void store_op2 _RE_ARGS ((re_opcode_t op, US_CHAR_TYPE *loc,
 				 int arg1, int arg2));
-static void insert_op1 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
-				  int arg, unsigned char *end));
-static void insert_op2 _RE_ARGS ((re_opcode_t op, unsigned char *loc,
-				  int arg1, int arg2, unsigned char *end));
-static boolean at_begline_loc_p _RE_ARGS ((const char *pattern, const char *p,
+static void insert_op1 _RE_ARGS ((re_opcode_t op, US_CHAR_TYPE *loc,
+				  int arg, US_CHAR_TYPE *end));
+static void insert_op2 _RE_ARGS ((re_opcode_t op, US_CHAR_TYPE *loc,
+				  int arg1, int arg2, US_CHAR_TYPE *end));
+static boolean at_begline_loc_p _RE_ARGS ((const CHAR_TYPE *pattern,
+					   const CHAR_TYPE *p,
 					   reg_syntax_t syntax));
-static boolean at_endline_loc_p _RE_ARGS ((const char *p, const char *pend,
+static boolean at_endline_loc_p _RE_ARGS ((const CHAR_TYPE *p,
+					   const CHAR_TYPE *pend,
 					   reg_syntax_t syntax));
+#ifdef MBS_SUPPORT
+static reg_errcode_t compile_range _RE_ARGS ((CHAR_TYPE range_start,
+					      const CHAR_TYPE **p_ptr,
+					      const CHAR_TYPE *pend,
+					      char *translate,
+					      reg_syntax_t syntax,
+					      US_CHAR_TYPE *b,
+					      CHAR_TYPE *char_set));
+static void insert_space _RE_ARGS ((int num, CHAR_TYPE *loc, CHAR_TYPE *end));
+#else
 static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
-					      const char **p_ptr,
-					      const char *pend,
+					      const CHAR_TYPE **p_ptr,
+					      const CHAR_TYPE *pend,
 					      char *translate,
 					      reg_syntax_t syntax,
-					      unsigned char *b));
+					      US_CHAR_TYPE *b));
+#endif /* MBS_SUPPORT */
 
 /* Fetch the next character in the uncompiled pattern---translating it
    if necessary.  Also cast from a signed character in the constant
    string passed to us by the user to an unsigned char that we can use
    as an array index (in, e.g., `translate').  */
+/* ifdef MBS_SUPPORT, we translate only if character <= 0xff,
+   because it is impossible to allocate 4GB array for some encodings
+   which have 4 byte character_set like UCS4.  */
 #ifndef PATFETCH
-# define PATFETCH(c)							\
+# ifdef MBS_SUPPORT
+#  define PATFETCH(c)							\
+  do {if (p == pend) return REG_EEND;					\
+    c = (US_CHAR_TYPE) *p++;						\
+    if (translate && (c <= 0xff)) c = (US_CHAR_TYPE) translate[c];	\
+  } while (0)
+# else
+#  define PATFETCH(c)							\
   do {if (p == pend) return REG_EEND;					\
     c = (unsigned char) *p++;						\
     if (translate) c = (unsigned char) translate[c];			\
   } while (0)
+# endif /* MBS_SUPPORT */
 #endif
 
 /* Fetch the next character in the uncompiled pattern, with no
    translation.  */
 #define PATFETCH_RAW(c)							\
   do {if (p == pend) return REG_EEND;					\
-    c = (unsigned char) *p++; 						\
+    c = (US_CHAR_TYPE) *p++; 						\
   } while (0)
 
 /* Go backwards one character in the pattern.  */
@@ -1667,27 +1883,42 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
    cast the subscript to translate because some data is declared as
    `char *', to avoid warnings when a string constant is passed.  But
    when we use a character as a subscript we must make it unsigned.  */
+/* ifdef MBS_SUPPORT, we translate only if character <= 0xff,
+   because it is impossible to allocate 4GB array for some encodings
+   which have 4 byte character_set like UCS4.  */
 #ifndef TRANSLATE
-# define TRANSLATE(d) \
+# ifdef MBS_SUPPORT
+#  define TRANSLATE(d) \
+  (translate && (sizeof(d) <= 1)? (char) translate[(unsigned char) (d)] : (d))
+#else
+#  define TRANSLATE(d) \
   (translate ? (char) translate[(unsigned char) (d)] : (d))
+# endif /* MBS_SUPPORT */
 #endif
 
 
 /* Macros for outputting the compiled pattern into `buffer'.  */
 
 /* If the buffer isn't allocated when it comes in, use this.  */
-#define INIT_BUF_SIZE  32
+#define INIT_BUF_SIZE  (32 * sizeof(US_CHAR_TYPE))
 
 /* Make sure we have at least N more bytes of space in buffer.  */
-#define GET_BUFFER_SPACE(n)						\
+#ifdef MBS_SUPPORT
+# define GET_BUFFER_SPACE(n)						\
+    while (((unsigned long)b - (unsigned long)COMPILED_BUFFER_VAR			\
+            + (n)*sizeof(CHAR_TYPE)) > bufp->allocated)			\
+      EXTEND_BUFFER ()
+#else
+# define GET_BUFFER_SPACE(n)						\
     while ((unsigned long) (b - bufp->buffer + (n)) > bufp->allocated)	\
       EXTEND_BUFFER ()
+#endif /* MBS_SUPPORT */
 
 /* Make sure we have one more byte of buffer space and then add C to it.  */
 #define BUF_PUSH(c)							\
   do {									\
     GET_BUFFER_SPACE (1);						\
-    *b++ = (unsigned char) (c);						\
+    *b++ = (US_CHAR_TYPE) (c);					\
   } while (0)
 
 
@@ -1695,8 +1926,8 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
 #define BUF_PUSH_2(c1, c2)						\
   do {									\
     GET_BUFFER_SPACE (2);						\
-    *b++ = (unsigned char) (c1);					\
-    *b++ = (unsigned char) (c2);					\
+    *b++ = (US_CHAR_TYPE) (c1);					\
+    *b++ = (US_CHAR_TYPE) (c2);					\
   } while (0)
 
 
@@ -1704,28 +1935,28 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
 #define BUF_PUSH_3(c1, c2, c3)						\
   do {									\
     GET_BUFFER_SPACE (3);						\
-    *b++ = (unsigned char) (c1);					\
-    *b++ = (unsigned char) (c2);					\
-    *b++ = (unsigned char) (c3);					\
+    *b++ = (US_CHAR_TYPE) (c1);					\
+    *b++ = (US_CHAR_TYPE) (c2);					\
+    *b++ = (US_CHAR_TYPE) (c3);					\
   } while (0)
 
-
 /* Store a jump with opcode OP at LOC to location TO.  We store a
    relative address offset by the three bytes the jump itself occupies.  */
 #define STORE_JUMP(op, loc, to) \
-  store_op1 (op, loc, (int) ((to) - (loc) - 3))
+  store_op1 (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)))
 
 /* Likewise, for a two-argument jump.  */
 #define STORE_JUMP2(op, loc, to, arg) \
-  store_op2 (op, loc, (int) ((to) - (loc) - 3), arg)
+  store_op2 (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), arg)
 
 /* Like `STORE_JUMP', but for inserting.  Assume `b' is the buffer end.  */
 #define INSERT_JUMP(op, loc, to) \
-  insert_op1 (op, loc, (int) ((to) - (loc) - 3), b)
+  insert_op1 (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), b)
 
 /* Like `STORE_JUMP2', but for inserting.  Assume `b' is the buffer end.  */
 #define INSERT_JUMP2(op, loc, to, arg) \
-  insert_op2 (op, loc, (int) ((to) - (loc) - 3), arg, b)
+  insert_op2 (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)),\
+	      arg, b)
 
 
 /* This is not an arbitrary limit: the arguments which represent offsets
@@ -1771,21 +2002,58 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
 # define MOVE_BUFFER_POINTER(P) (P) += incr
 # define ELSE_EXTEND_BUFFER_HIGH_BOUND
 #endif
-#define EXTEND_BUFFER()							\
+
+#ifdef MBS_SUPPORT
+# define EXTEND_BUFFER()						\
+  do {									\
+    US_CHAR_TYPE *old_buffer = COMPILED_BUFFER_VAR;			\
+    int wchar_count;							\
+    if (bufp->allocated + sizeof(US_CHAR_TYPE) > MAX_BUF_SIZE)		\
+      return REG_ESIZE;							\
+    bufp->allocated <<= 1;						\
+    if (bufp->allocated > MAX_BUF_SIZE)					\
+      bufp->allocated = MAX_BUF_SIZE;					\
+    /* How many characters the new buffer can have?  */			\
+    wchar_count = bufp->allocated / sizeof(US_CHAR_TYPE);		\
+    if (wchar_count == 0) wchar_count = 1;				\
+    /* Truncate the buffer to CHAR_TYPE align.  */			\
+    bufp->allocated = wchar_count * sizeof(US_CHAR_TYPE);		\
+    RETALLOC (COMPILED_BUFFER_VAR, wchar_count, US_CHAR_TYPE);		\
+    bufp->buffer = (char*)COMPILED_BUFFER_VAR;				\
+    if (COMPILED_BUFFER_VAR == NULL)					\
+      return REG_ESPACE;						\
+    /* If the buffer moved, move all the pointers into it.  */		\
+    if (old_buffer != COMPILED_BUFFER_VAR)				\
+      {									\
+	int incr = COMPILED_BUFFER_VAR - old_buffer;			\
+	MOVE_BUFFER_POINTER (b);					\
+	MOVE_BUFFER_POINTER (begalt);					\
+	if (fixup_alt_jump)						\
+	  MOVE_BUFFER_POINTER (fixup_alt_jump);				\
+	if (laststart)							\
+	  MOVE_BUFFER_POINTER (laststart);				\
+	if (pending_exact)						\
+	  MOVE_BUFFER_POINTER (pending_exact);				\
+      }									\
+    ELSE_EXTEND_BUFFER_HIGH_BOUND					\
+  } while (0)
+#else
+# define EXTEND_BUFFER()						\
   do {									\
-    unsigned char *old_buffer = bufp->buffer;				\
+    US_CHAR_TYPE *old_buffer = COMPILED_BUFFER_VAR;			\
     if (bufp->allocated == MAX_BUF_SIZE)				\
       return REG_ESIZE;							\
     bufp->allocated <<= 1;						\
     if (bufp->allocated > MAX_BUF_SIZE)					\
       bufp->allocated = MAX_BUF_SIZE;					\
-    bufp->buffer = (unsigned char *) REALLOC (bufp->buffer, bufp->allocated);\
-    if (bufp->buffer == NULL)						\
+    bufp->buffer = (US_CHAR_TYPE *) REALLOC (COMPILED_BUFFER_VAR,	\
+						bufp->allocated);	\
+    if (COMPILED_BUFFER_VAR == NULL)					\
       return REG_ESPACE;						\
     /* If the buffer moved, move all the pointers into it.  */		\
-    if (old_buffer != bufp->buffer)					\
+    if (old_buffer != COMPILED_BUFFER_VAR)				\
       {									\
-	int incr = bufp->buffer - old_buffer;				\
+	int incr = COMPILED_BUFFER_VAR - old_buffer;			\
 	MOVE_BUFFER_POINTER (b);					\
 	MOVE_BUFFER_POINTER (begalt);					\
 	if (fixup_alt_jump)						\
@@ -1797,7 +2065,7 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
       }									\
     ELSE_EXTEND_BUFFER_HIGH_BOUND					\
   } while (0)
-
+#endif /* MBS_SUPPORT */
 
 /* Since we have one byte reserved for the register number argument to
    {start,stop}_memory, the maximum number of groups we can report
@@ -1965,33 +2233,61 @@ static boolean group_in_compile_stack _RE_ARGS ((compile_stack_type
    examined nor set.  */
 
 /* Return, freeing storage we allocated.  */
-#define FREE_STACK_RETURN(value)		\
+#ifdef MBS_SUPPORT
+# define FREE_STACK_RETURN(value)		\
+  return (free(pattern), free(mbs_offset), free(is_binary), free (compile_stack.stack), value)
+#else
+# define FREE_STACK_RETURN(value)		\
   return (free (compile_stack.stack), value)
+#endif /* MBS_SUPPORT */
 
 static reg_errcode_t
+#ifdef MBS_SUPPORT
+regex_compile (cpattern, csize, syntax, bufp)
+     const char *cpattern;
+     size_t csize;
+#else
 regex_compile (pattern, size, syntax, bufp)
      const char *pattern;
      size_t size;
+#endif /* MBS_SUPPORT */
      reg_syntax_t syntax;
      struct re_pattern_buffer *bufp;
 {
   /* We fetch characters from PATTERN here.  Even though PATTERN is
      `char *' (i.e., signed), we declare these variables as unsigned, so
      they can be reliably used as array indices.  */
-  register unsigned char c, c1;
+  register US_CHAR_TYPE c, c1;
+
+#ifdef MBS_SUPPORT
+  /* A temporary space to keep wchar_t pattern and compiled pattern.  */
+  CHAR_TYPE *pattern, *COMPILED_BUFFER_VAR;
+  size_t size;
+  /* offset buffer for optimizatoin. See convert_mbs_to_wc.  */
+  int *mbs_offset = NULL;
+  /* It hold whether each wchar_t is binary data or not.  */
+  int *is_binary = NULL;
+  /* A flag whether exactn is handling binary data or not.  */
+  int is_exactn_bin = FALSE;
+#endif /* MBS_SUPPORT */
 
   /* A random temporary spot in PATTERN.  */
-  const char *p1;
+  const CHAR_TYPE *p1;
 
   /* Points to the end of the buffer, where we should append.  */
-  register unsigned char *b;
+  register US_CHAR_TYPE *b;
 
   /* Keeps track of unclosed groups.  */
   compile_stack_type compile_stack;
 
   /* Points to the current (ending) position in the pattern.  */
-  const char *p = pattern;
-  const char *pend = pattern + size;
+#ifdef MBS_SUPPORT
+  const CHAR_TYPE *p;
+  const CHAR_TYPE *pend;
+#else
+  const CHAR_TYPE *p = pattern;
+  const CHAR_TYPE *pend = pattern + size;
+#endif /* MBS_SUPPORT */
 
   /* How to translate the characters in the pattern.  */
   RE_TRANSLATE_TYPE translate = bufp->translate;
@@ -2000,30 +2296,57 @@ regex_compile (pattern, size, syntax, bufp)
      command.  This makes it possible to tell if a new exact-match
      character can be added to that command or if the character requires
      a new `exactn' command.  */
-  unsigned char *pending_exact = 0;
+  US_CHAR_TYPE *pending_exact = 0;
 
   /* Address of start of the most recently finished expression.
      This tells, e.g., postfix * where to find the start of its
      operand.  Reset at the beginning of groups and alternatives.  */
-  unsigned char *laststart = 0;
+  US_CHAR_TYPE *laststart = 0;
 
   /* Address of beginning of regexp, or inside of last group.  */
-  unsigned char *begalt;
+  US_CHAR_TYPE *begalt;
 
   /* Place in the uncompiled pattern (i.e., the {) to
      which to go back if the interval is invalid.  */
+#ifdef MBS_SUPPORT
+  const US_CHAR_TYPE *beg_interval;
+#else
   const char *beg_interval;
+#endif /* MBS_SUPPORT */
 
   /* Address of the place where a forward jump should go to the end of
      the containing expression.  Each alternative of an `or' -- except the
      last -- ends with a forward jump of this sort.  */
-  unsigned char *fixup_alt_jump = 0;
+  US_CHAR_TYPE *fixup_alt_jump = 0;
 
   /* Counts open-groups as they are encountered.  Remembered for the
      matching close-group on the compile stack, so the same register
      number is put in the stop_memory as the start_memory.  */
   regnum_t regnum = 0;
 
+#ifdef MBS_SUPPORT
+  /* Initialize the wchar_t PATTERN and offset_buffer.  */
+  p = pend = pattern = TALLOC(csize, CHAR_TYPE);
+  mbs_offset = TALLOC(csize + 1, int);
+  is_binary = TALLOC(csize + 1, int);
+  if (pattern == NULL || mbs_offset == NULL || is_binary == NULL)
+    {
+      if (pattern) free(pattern);
+      if (mbs_offset) free(mbs_offset);
+      if (is_binary) free(is_binary);
+      return REG_ESPACE;
+    }
+  size = convert_mbs_to_wcs(pattern, cpattern, csize, mbs_offset, is_binary);
+  pend = p + size;
+  if (size < 0)
+    {
+      if (pattern) free(pattern);
+      if (mbs_offset) free(mbs_offset);
+      if (is_binary) free(is_binary);
+      return REG_BADPAT;
+    }
+#endif
+
 #ifdef DEBUG
   DEBUG_PRINT1 ("\nCompiling pattern: ");
   if (debug)
@@ -2031,7 +2354,7 @@ regex_compile (pattern, size, syntax, bufp)
       unsigned debug_count;
 
       for (debug_count = 0; debug_count < size; debug_count++)
-        putchar (pattern[debug_count]);
+        PUT_CHAR (pattern[debug_count]);
       putchar ('\n');
     }
 #endif /* DEBUG */
@@ -2039,7 +2362,14 @@ regex_compile (pattern, size, syntax, bufp)
   /* Initialize the compile stack.  */
   compile_stack.stack = TALLOC (INIT_COMPILE_STACK_SIZE, compile_stack_elt_t);
   if (compile_stack.stack == NULL)
-    return REG_ESPACE;
+    {
+#ifdef MBS_SUPPORT
+      if (pattern) free(pattern);
+      if (mbs_offset) free(mbs_offset);
+      if (is_binary) free(is_binary);
+#endif
+      return REG_ESPACE;
+    }
 
   compile_stack.size = INIT_COMPILE_STACK_SIZE;
   compile_stack.avail = 0;
@@ -2068,18 +2398,34 @@ regex_compile (pattern, size, syntax, bufp)
 	{ /* If zero allocated, but buffer is non-null, try to realloc
              enough space.  This loses if buffer's address is bogus, but
              that is the user's responsibility.  */
-          RETALLOC (bufp->buffer, INIT_BUF_SIZE, unsigned char);
+#ifdef MBS_SUPPORT
+	  /* Free bufp->buffer and allocate an array for wchar_t pattern
+	     buffer.  */
+          free(bufp->buffer);
+          COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE/sizeof(US_CHAR_TYPE),
+					US_CHAR_TYPE);
+#else
+          RETALLOC (COMPILED_BUFFER_VAR, INIT_BUF_SIZE, US_CHAR_TYPE);
+#endif /* MBS_SUPPORT */
         }
       else
         { /* Caller did not allocate a buffer.  Do it for them.  */
-          bufp->buffer = TALLOC (INIT_BUF_SIZE, unsigned char);
+          COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE / sizeof(US_CHAR_TYPE),
+					US_CHAR_TYPE);
         }
-      if (!bufp->buffer) FREE_STACK_RETURN (REG_ESPACE);
 
+      if (!COMPILED_BUFFER_VAR) FREE_STACK_RETURN (REG_ESPACE);
+#ifdef MBS_SUPPORT
+      bufp->buffer = (char*)COMPILED_BUFFER_VAR;
+#endif /* MBS_SUPPORT */
       bufp->allocated = INIT_BUF_SIZE;
     }
+#ifdef MBS_SUPPORT
+  else
+    COMPILED_BUFFER_VAR = (US_CHAR_TYPE*) bufp->buffer;
+#endif
 
-  begalt = b = bufp->buffer;
+  begalt = b = COMPILED_BUFFER_VAR;
 
   /* Loop through the uncompiled pattern until we're at the end.  */
   while (p != pend)
@@ -2204,7 +2550,7 @@ regex_compile (pattern, size, syntax, bufp)
                 assert (p - 1 > pattern);
 
                 /* Allocate the space for the jump.  */
-                GET_BUFFER_SPACE (3);
+                GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
 
                 /* We know we are not at the first character of the pattern,
                    because laststart was nonzero.  And we've already
@@ -2221,20 +2567,23 @@ regex_compile (pattern, size, syntax, bufp)
                   }
                 else
                   /* Anything else.  */
-                  STORE_JUMP (maybe_pop_jump, b, laststart - 3);
+                  STORE_JUMP (maybe_pop_jump, b, laststart -
+			      (1 + OFFSET_ADDRESS_SIZE));
 
                 /* We've added more stuff to the buffer.  */
-                b += 3;
+                b += 1 + OFFSET_ADDRESS_SIZE;
               }
 
             /* On failure, jump from laststart to b + 3, which will be the
                end of the buffer after this jump is inserted.  */
-            GET_BUFFER_SPACE (3);
+	    /* ifdef MBS_SUPPORT, 'b + 1 + OFFSET_ADDRESS_SIZE' instead of
+	       'b + 3'.  */
+            GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
             INSERT_JUMP (keep_string_p ? on_failure_keep_string_jump
                                        : on_failure_jump,
-                         laststart, b + 3);
+                         laststart, b + 1 + OFFSET_ADDRESS_SIZE);
             pending_exact = 0;
-            b += 3;
+            b += 1 + OFFSET_ADDRESS_SIZE;
 
             if (!zero_times_ok)
               {
@@ -2243,9 +2592,10 @@ regex_compile (pattern, size, syntax, bufp)
                    `on_failure_jump' instruction of the loop. This
                    effects a skip over that instruction the first time
                    we hit that loop.  */
-                GET_BUFFER_SPACE (3);
-                INSERT_JUMP (dummy_failure_jump, laststart, laststart + 6);
-                b += 3;
+                GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
+                INSERT_JUMP (dummy_failure_jump, laststart, laststart +
+			     2 + 2 * OFFSET_ADDRESS_SIZE);
+                b += 1 + OFFSET_ADDRESS_SIZE;
               }
             }
 	  break;
@@ -2260,10 +2610,467 @@ regex_compile (pattern, size, syntax, bufp)
         case '[':
           {
             boolean had_char_class = false;
+#ifdef MBS_SUPPORT
+	    CHAR_TYPE range_start = 0xffffffff;
+#else
 	    unsigned int range_start = 0xffffffff;
-
+#endif
             if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
 
+#ifdef MBS_SUPPORT
+	    /* We assume a charset(_not) structure as a wchar_t array.
+	       charset[0] = (re_opcode_t) charset(_not)
+               charset[1] = l (= length of char_classes)
+               charset[2] = m (= length of collating_symbols)
+               charset[3] = n (= length of equivalence_classes)
+	       charset[4] = o (= length of char_ranges)
+	       charset[5] = p (= length of chars)
+
+               charset[6] = char_class (wctype_t)
+                         ...
+               charset[l+5]  = char_class (wctype_t)
+
+               charset[l+6]  = collating_symbol (wchar_t)
+                            ...
+               charset[l+m+5]  = collating_symbol (wchar_t)
+					ifdef _LIBC we use the index if
+					_NL_COLLATE_SYMB_EXTRAMB instead of
+					wchar_t string.
+
+               charset[l+m+6]  = equivalence_classes (wchar_t)
+                              ...
+               charset[l+m+n+5]  = equivalence_classes (wchar_t)
+					ifdef _LIBC we use the index in
+					_NL_COLLATE_WEIGHT instead of
+					wchar_t string.
+
+	       charset[l+m+n+6] = range_start
+	       charset[l+m+n+7] = range_end
+	                       ...
+	       charset[l+m+n+2o+4] = range_start
+	       charset[l+m+n+2o+5] = range_end
+					ifdef _LIBC we use the value looked up
+					in _NL_COLLATE_COLLSEQ instead of
+					wchar_t character.
+
+	       charset[l+m+n+2o+6] = char
+	                          ...
+	       charset[l+m+n+2o+p+5] = char
+
+	     */
+
+	    /* We need at least 6 spaces: the opcode, the length of
+               char_classes, the length of collating_symbols, the length of
+               equivalence_classes, the length of char_ranges, the length of
+               chars.  */
+	    GET_BUFFER_SPACE (6);
+
+	    /* Save b as laststart. And We use laststart as the pointer
+	       to the first element of the charset here.
+	       In other words, laststart[i] indicates charset[i].  */
+            laststart = b;
+
+            /* We test `*p == '^' twice, instead of using an if
+               statement, so we only need one BUF_PUSH.  */
+            BUF_PUSH (*p == '^' ? charset_not : charset);
+            if (*p == '^')
+              p++;
+
+            /* Push the length of char_classes, the length of
+               collating_symbols, the length of equivalence_classes, the
+               length of char_ranges and the length of chars.  */
+            BUF_PUSH_3 (0, 0, 0);
+            BUF_PUSH_2 (0, 0);
+
+            /* Remember the first position in the bracket expression.  */
+            p1 = p;
+
+            /* charset_not matches newline according to a syntax bit.  */
+            if ((re_opcode_t) b[-6] == charset_not
+                && (syntax & RE_HAT_LISTS_NOT_NEWLINE))
+	      {
+		BUF_PUSH('\n');
+		laststart[5]++; /* Update the length of characters  */
+	      }
+
+            /* Read in characters and ranges, setting map bits.  */
+            for (;;)
+              {
+                if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
+
+                PATFETCH (c);
+
+                /* \ might escape characters inside [...] and [^...].  */
+                if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\')
+                  {
+                    if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
+
+                    PATFETCH (c1);
+		    BUF_PUSH(c1);
+		    laststart[5]++; /* Update the length of chars  */
+		    range_start = c1;
+                    continue;
+                  }
+
+                /* Could be the end of the bracket expression.  If it's
+                   not (i.e., when the bracket expression is `[]' so
+                   far), the ']' character bit gets set way below.  */
+                if (c == ']' && p != p1 + 1)
+                  break;
+
+                /* Look ahead to see if it's a range when the last thing
+                   was a character class.  */
+                if (had_char_class && c == '-' && *p != ']')
+                  FREE_STACK_RETURN (REG_ERANGE);
+
+                /* Look ahead to see if it's a range when the last thing
+                   was a character: if this is a hyphen not at the
+                   beginning or the end of a list, then it's the range
+                   operator.  */
+                if (c == '-'
+                    && !(p - 2 >= pattern && p[-2] == '[')
+                    && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^')
+                    && *p != ']')
+                  {
+                    reg_errcode_t ret;
+		    /* Allocate the space for range_start and range_end.  */
+		    GET_BUFFER_SPACE (2);
+		    /* Update the pointer to indicate end of buffer.  */
+                    b += 2;
+                    ret = compile_range (range_start, &p, pend, translate,
+                                         syntax, b, laststart);
+                    if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
+                    range_start = 0xffffffff;
+                  }
+                else if (p[0] == '-' && p[1] != ']')
+                  { /* This handles ranges made up of characters only.  */
+                    reg_errcode_t ret;
+
+		    /* Move past the `-'.  */
+                    PATFETCH (c1);
+		    /* Allocate the space for range_start and range_end.  */
+		    GET_BUFFER_SPACE (2);
+		    /* Update the pointer to indicate end of buffer.  */
+                    b += 2;
+                    ret = compile_range (c, &p, pend, translate, syntax, b,
+                                         laststart);
+                    if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
+		    range_start = 0xffffffff;
+                  }
+
+                /* See if we're at the beginning of a possible character
+                   class.  */
+                else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':')
+                  { /* Leave room for the null.  */
+                    char str[CHAR_CLASS_MAX_LENGTH + 1];
+
+                    PATFETCH (c);
+                    c1 = 0;
+
+                    /* If pattern is `[[:'.  */
+                    if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
+
+                    for (;;)
+                      {
+                        PATFETCH (c);
+                        if ((c == ':' && *p == ']') || p == pend)
+                          break;
+			if (c1 < CHAR_CLASS_MAX_LENGTH)
+			  str[c1++] = c;
+			else
+			  /* This is in any case an invalid class name.  */
+			  str[0] = '\0';
+                      }
+                    str[c1] = '\0';
+
+                    /* If isn't a word bracketed by `[:' and `:]':
+                       undo the ending character, the letters, and leave
+                       the leading `:' and `[' (but store them as character).  */
+                    if (c == ':' && *p == ']')
+                      {
+			wctype_t wt;
+			/* Query the character class as wctype_t.  */
+			wt = IS_CHAR_CLASS (str);
+			if (wt == 0)
+			  FREE_STACK_RETURN (REG_ECTYPE);
+
+                        /* Throw away the ] at the end of the character
+                           class.  */
+                        PATFETCH (c);
+
+                        if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
+
+			/* Allocate the space for character class.  */
+                        GET_BUFFER_SPACE(1);
+			/* Update the pointer to indicate end of buffer.  */
+                        b++;
+			/* Move data which follow character classes
+			    not to violate the data.  */
+                        insert_space(1, laststart+6, b-1);
+			/* Store the character class.  */
+                        laststart[6] = (CHAR_TYPE) wt;
+                        laststart[1]++; /* Update length of char_classes */
+
+                        had_char_class = true;
+                      }
+                    else
+                      {
+                        c1++;
+                        while (c1--)
+                          PATUNFETCH;
+                        BUF_PUSH ('[');
+                        BUF_PUSH (':');
+                        laststart[5] += 2; /* Update the length of characters  */
+			range_start = ':';
+                        had_char_class = false;
+                      }
+                  }
+                else if (syntax & RE_CHAR_CLASSES && c == '[' && (*p == '='
+							  || *p == '.'))
+		  {
+		    CHAR_TYPE str[128];	/* Should be large enough.  */
+		    CHAR_TYPE delim = *p; /* '=' or '.'  */
+# ifdef _LIBC
+		    uint32_t nrules =
+		      _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+# endif
+		    PATFETCH (c);
+		    c1 = 0;
+
+		    /* If pattern is `[[=' or '[[.'.  */
+		    if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
+
+		    for (;;)
+		      {
+			PATFETCH (c);
+			if ((c == delim && *p == ']') || p == pend)
+			  break;
+			if (c1 < sizeof (str) - 1)
+			  str[c1++] = c;
+			else
+			  /* This is in any case an invalid class name.  */
+			  str[0] = '\0';
+                      }
+		    str[c1] = '\0';
+
+		    if (c == delim && *p == ']' && str[0] != '\0')
+		      {
+                        unsigned int i, offset;
+			/* If we have no collation data we use the default
+			   collation in which each character is in a class
+			   by itself.  It also means that ASCII is the
+			   character set and therefore we cannot have character
+			   with more than one byte in the multibyte
+			   representation.  */
+
+                        /* If not defined _LIBC, we push the name and
+			   `\0' for the sake of matching performance.  */
+			int datasize = c1 + 1;
+
+# ifdef _LIBC
+			int32_t idx = 0;
+			if (nrules == 0)
+# endif
+			  {
+			    if (c1 != 1)
+			      FREE_STACK_RETURN (REG_ECOLLATE);
+			  }
+# ifdef _LIBC
+			else
+			  {
+			    const int32_t *table;
+			    const int32_t *weights;
+			    const int32_t *extra;
+			    const int32_t *indirect;
+			    wint_t *cp;
+
+			    /* This #include defines a local function!  */
+#  include <locale/weightwc.h>
+
+			    if(delim == '=')
+			      {
+				/* We push the index for equivalence class.  */
+				cp = (wint_t*)str;
+
+				table = (const int32_t *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_TABLEWC);
+				weights = (const int32_t *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_WEIGHTWC);
+				extra = (const int32_t *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_EXTRAWC);
+				indirect = (const int32_t *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_INDIRECTWC);
+
+				idx = findidx ((const wint_t**)&cp);
+				if (idx == 0 || cp < (wint_t*) str + c1)
+				  /* This is no valid character.  */
+				  FREE_STACK_RETURN (REG_ECOLLATE);
+
+				str[0] = (wchar_t)idx;
+			      }
+			    else /* delim == '.' */
+			      {
+				/* We push collation sequence value
+				   for collating symbol.  */
+				int32_t table_size;
+				const int32_t *symb_table;
+				const unsigned char *extra;
+				int32_t idx;
+				int32_t elem;
+				int32_t second;
+				int32_t hash;
+				char char_str[c1];
+
+				/* We have to convert the name to a single-byte
+				   string.  This is possible since the names
+				   consist of ASCII characters and the internal
+				   representation is UCS4.  */
+				for (i = 0; i < c1; ++i)
+				  char_str[i] = str[i];
+
+				table_size =
+				  _NL_CURRENT_WORD (LC_COLLATE,
+						    _NL_COLLATE_SYMB_HASH_SIZEMB);
+				symb_table = (const int32_t *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_SYMB_TABLEMB);
+				extra = (const unsigned char *)
+				  _NL_CURRENT (LC_COLLATE,
+					       _NL_COLLATE_SYMB_EXTRAMB);
+
+				/* Locate the character in the hashing table.  */
+				hash = elem_hash (char_str, c1);
+
+				idx = 0;
+				elem = hash % table_size;
+				second = hash % (table_size - 2);
+				while (symb_table[2 * elem] != 0)
+				  {
+				    /* First compare the hashing value.  */
+				    if (symb_table[2 * elem] == hash
+					&& c1 == extra[symb_table[2 * elem + 1]]
+					&& memcmp (str,
+						   &extra[symb_table[2 * elem + 1]
+							 + 1], c1) == 0)
+				      {
+					/* Yep, this is the entry.  */
+					idx = symb_table[2 * elem + 1];
+					idx += 1 + extra[idx];
+					break;
+				      }
+
+				    /* Next entry.  */
+				    elem += second;
+				  }
+
+				if (symb_table[2 * elem] != 0)
+				  {
+				    /* Compute the index of the byte sequence
+				       in the table.  */
+				    idx += 1 + extra[idx];
+				    /* Adjust for the alignment.  */
+				    idx = (idx + 3) & ~4;
+
+				    str[0] = (wchar_t) &extra[idx + 4];
+				  }
+				else if (symb_table[2 * elem] == 0 && c1 == 1)
+				  {
+				    /* No valid character.  Match it as a
+				       single byte character.  */
+				    had_char_class = false;
+				    BUF_PUSH(str[0]);
+				    /* Update the length of characters  */
+				    laststart[5]++;
+				    range_start = str[0];
+
+				    /* Throw away the ] at the end of the
+				       collating symbol.  */
+				    PATFETCH (c);
+				    /* exit from the switch block.  */
+				    continue;
+				  }
+				else
+				  FREE_STACK_RETURN (REG_ECOLLATE);
+			      }
+			    datasize = 1;
+			  }
+# endif
+                        /* Throw away the ] at the end of the equivalence
+                           class (or collating symbol).  */
+                        PATFETCH (c);
+
+			/* Allocate the space for the equivalence class
+			   (or collating symbol) (and '\0' if needed).  */
+                        GET_BUFFER_SPACE(datasize);
+			/* Update the pointer to indicate end of buffer.  */
+                        b += datasize;
+
+			if (delim == '=')
+			  { /* equivalence class  */
+			    /* Calculate the offset of char_ranges,
+			       which is next to equivalence_classes.  */
+			    offset = laststart[1] + laststart[2]
+			      + laststart[3] +6;
+			    /* Insert space.  */
+			    insert_space(datasize, laststart + offset, b - 1);
+
+			    /* Write the equivalence_class and \0.  */
+			    for (i = 0 ; i < datasize ; i++)
+			      laststart[offset + i] = str[i];
+
+			    /* Update the length of equivalence_classes.  */
+			    laststart[3] += datasize;
+			    had_char_class = true;
+			  }
+			else /* delim == '.' */
+			  { /* collating symbol  */
+			    /* Calculate the offset of the equivalence_classes,
+			       which is next to collating_symbols.  */
+			    offset = laststart[1] + laststart[2] + 6;
+			    /* Insert space and write the collationg_symbol
+			       and \0.  */
+			    insert_space(datasize, laststart + offset, b-1);
+			    for (i = 0 ; i < datasize ; i++)
+			      laststart[offset + i] = str[i];
+
+			    /* In re_match_2_internal if range_start < -1, we
+			       assume -range_start is the offset of the
+			       collating symbol which is specified as
+			       the character of the range start.  So we assign
+			       -(laststart[1] + laststart[2] + 6) to
+			       range_start.  */
+			    range_start = -(laststart[1] + laststart[2] + 6);
+			    /* Update the length of collating_symbol.  */
+			    laststart[2] += datasize;
+			    had_char_class = false;
+			  }
+		      }
+                    else
+                      {
+                        c1++;
+                        while (c1--)
+                          PATUNFETCH;
+                        BUF_PUSH ('[');
+                        BUF_PUSH (delim);
+                        laststart[5] += 2; /* Update the length of characters  */
+			range_start = delim;
+                        had_char_class = false;
+                      }
+		  }
+                else
+                  {
+                    had_char_class = false;
+		    BUF_PUSH(c);
+		    laststart[5]++;  /* Update the length of characters  */
+		    range_start = c;
+                  }
+	      }
+
+#else /* not MBS_SUPPORT */
             /* Ensure that we have enough space to push a charset: the
                opcode, the length count, and the bitset; 34 bytes in all.  */
 	    GET_BUFFER_SPACE (34);
@@ -2378,7 +3185,7 @@ regex_compile (pattern, size, syntax, bufp)
                        the leading `:' and `[' (but set bits for them).  */
                     if (c == ':' && *p == ']')
                       {
-#if defined _LIBC || WIDE_CHAR_SUPPORT
+# if defined _LIBC || WIDE_CHAR_SUPPORT
                         boolean is_lower = STREQ (str, "lower");
                         boolean is_upper = STREQ (str, "upper");
 			wctype_t wt;
@@ -2396,13 +3203,13 @@ regex_compile (pattern, size, syntax, bufp)
 
                         for (ch = 0; ch < 1 << BYTEWIDTH; ++ch)
 			  {
-# ifdef _LIBC
+#  ifdef _LIBC
 			    if (__iswctype (__btowc (ch), wt))
 			      SET_LIST_BIT (ch);
-# else
+#  else
 			    if (iswctype (btowc (ch), wt))
 			      SET_LIST_BIT (ch);
-# endif
+#  endif
 
 			    if (translate && (is_upper || is_lower)
 				&& (ISUPPER (ch) || ISLOWER (ch)))
@@ -2410,7 +3217,7 @@ regex_compile (pattern, size, syntax, bufp)
 			  }
 
                         had_char_class = true;
-#else
+# else
                         int ch;
                         boolean is_alnum = STREQ (str, "alnum");
                         boolean is_alpha = STREQ (str, "alpha");
@@ -2458,7 +3265,7 @@ regex_compile (pattern, size, syntax, bufp)
 			      SET_LIST_BIT (ch);
                           }
                         had_char_class = true;
-#endif	/* libc || wctype.h */
+# endif	/* libc || wctype.h */
                       }
                     else
                       {
@@ -2474,10 +3281,10 @@ regex_compile (pattern, size, syntax, bufp)
                 else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '=')
 		  {
 		    unsigned char str[MB_LEN_MAX + 1];
-#ifdef _LIBC
+# ifdef _LIBC
 		    uint32_t nrules =
 		      _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-#endif
+# endif
 
 		    PATFETCH (c);
 		    c1 = 0;
@@ -2506,9 +3313,9 @@ regex_compile (pattern, size, syntax, bufp)
 			   character set and therefore we cannot have character
 			   with more than one byte in the multibyte
 			   representation.  */
-#ifdef _LIBC
+# ifdef _LIBC
 			if (nrules == 0)
-#endif
+# endif
 			  {
 			    if (c1 != 1)
 			      FREE_STACK_RETURN (REG_ECOLLATE);
@@ -2520,7 +3327,7 @@ regex_compile (pattern, size, syntax, bufp)
 			    /* Set the bit for the character.  */
 			    SET_LIST_BIT (str[0]);
 			  }
-#ifdef _LIBC
+# ifdef _LIBC
 			else
 			  {
 			    /* Try to match the byte sequence in `str' against
@@ -2536,7 +3343,7 @@ regex_compile (pattern, size, syntax, bufp)
 			    int ch;
 
 			    /* This #include defines a local function!  */
-# include <locale/weight.h>
+#  include <locale/weight.h>
 
 			    table = (const int32_t *)
 			      _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
@@ -2582,7 +3389,7 @@ regex_compile (pattern, size, syntax, bufp)
 				      while (cnt < len
 					     && (weights[idx + 1 + cnt]
 						 == weights[idx2 + 1 + cnt]))
-					++len;
+					++cnt;
 
 				      if (cnt == len)
 					/* They match.  Mark the character as
@@ -2591,7 +3398,7 @@ regex_compile (pattern, size, syntax, bufp)
 				    }
 				}
 			  }
-#endif
+# endif
 			had_char_class = true;
 		      }
                     else
@@ -2608,15 +3415,15 @@ regex_compile (pattern, size, syntax, bufp)
                 else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '.')
 		  {
 		    unsigned char str[128];	/* Should be large enough.  */
-#ifdef _LIBC
+# ifdef _LIBC
 		    uint32_t nrules =
 		      _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-#endif
+# endif
 
 		    PATFETCH (c);
 		    c1 = 0;
 
-		    /* If pattern is `[[='.  */
+		    /* If pattern is `[[.'.  */
 		    if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
 
 		    for (;;)
@@ -2641,9 +3448,9 @@ regex_compile (pattern, size, syntax, bufp)
 			   character set and therefore we cannot have character
 			   with more than one byte in the multibyte
 			   representation.  */
-#ifdef _LIBC
+# ifdef _LIBC
 			if (nrules == 0)
-#endif
+# endif
 			  {
 			    if (c1 != 1)
 			      FREE_STACK_RETURN (REG_ECOLLATE);
@@ -2656,7 +3463,7 @@ regex_compile (pattern, size, syntax, bufp)
 			    SET_LIST_BIT (str[0]);
 			    range_start = ((const unsigned char *) str)[0];
 			  }
-#ifdef _LIBC
+# ifdef _LIBC
 			else
 			  {
 			    /* Try to match the byte sequence in `str' against
@@ -2734,7 +3541,7 @@ regex_compile (pattern, size, syntax, bufp)
 				++idx;
 			      }
 			  }
-#endif
+# endif
 			had_char_class = false;
 		      }
                     else
@@ -2761,6 +3568,7 @@ regex_compile (pattern, size, syntax, bufp)
             while ((int) b[-1] > 0 && b[b[-1] - 1] == 0)
               b[-1]--;
             b += b[-1];
+#endif /* MBS_SUPPORT */
           }
           break;
 
@@ -2831,10 +3639,10 @@ regex_compile (pattern, size, syntax, bufp)
                  group.  They are all relative offsets, so that if the
                  whole pattern moves because of realloc, they will still
                  be valid.  */
-              COMPILE_STACK_TOP.begalt_offset = begalt - bufp->buffer;
+              COMPILE_STACK_TOP.begalt_offset = begalt - COMPILED_BUFFER_VAR;
               COMPILE_STACK_TOP.fixup_alt_jump
-                = fixup_alt_jump ? fixup_alt_jump - bufp->buffer + 1 : 0;
-              COMPILE_STACK_TOP.laststart_offset = b - bufp->buffer;
+                = fixup_alt_jump ? fixup_alt_jump - COMPILED_BUFFER_VAR + 1 : 0;
+              COMPILE_STACK_TOP.laststart_offset = b - COMPILED_BUFFER_VAR;
               COMPILE_STACK_TOP.regnum = regnum;
 
               /* We will eventually replace the 0 with the number of
@@ -2843,7 +3651,8 @@ regex_compile (pattern, size, syntax, bufp)
                  represent in the compiled pattern.  */
               if (regnum <= MAX_REGNUM)
                 {
-                  COMPILE_STACK_TOP.inner_group_offset = b - bufp->buffer + 2;
+                  COMPILE_STACK_TOP.inner_group_offset = b
+		    - COMPILED_BUFFER_VAR + 2;
                   BUF_PUSH_3 (start_memory, regnum, 0);
                 }
 
@@ -2902,12 +3711,12 @@ regex_compile (pattern, size, syntax, bufp)
                 regnum_t this_group_regnum;
 
                 compile_stack.avail--;
-                begalt = bufp->buffer + COMPILE_STACK_TOP.begalt_offset;
+                begalt = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.begalt_offset;
                 fixup_alt_jump
                   = COMPILE_STACK_TOP.fixup_alt_jump
-                    ? bufp->buffer + COMPILE_STACK_TOP.fixup_alt_jump - 1
+                    ? COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.fixup_alt_jump - 1
                     : 0;
-                laststart = bufp->buffer + COMPILE_STACK_TOP.laststart_offset;
+                laststart = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.laststart_offset;
                 this_group_regnum = COMPILE_STACK_TOP.regnum;
 		/* If we've reached MAX_REGNUM groups, then this open
 		   won't actually generate any code, so we'll have to
@@ -2918,8 +3727,8 @@ regex_compile (pattern, size, syntax, bufp)
                    groups were inside this one.  */
                 if (this_group_regnum <= MAX_REGNUM)
                   {
-                    unsigned char *inner_group_loc
-                      = bufp->buffer + COMPILE_STACK_TOP.inner_group_offset;
+		    US_CHAR_TYPE *inner_group_loc
+                      = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.inner_group_offset;
 
                     *inner_group_loc = regnum - this_group_regnum;
                     BUF_PUSH_3 (stop_memory, this_group_regnum,
@@ -2938,10 +3747,11 @@ regex_compile (pattern, size, syntax, bufp)
 
               /* Insert before the previous alternative a jump which
                  jumps to this alternative if the former fails.  */
-              GET_BUFFER_SPACE (3);
-              INSERT_JUMP (on_failure_jump, begalt, b + 6);
+              GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
+              INSERT_JUMP (on_failure_jump, begalt,
+			   b + 2 + 2 * OFFSET_ADDRESS_SIZE);
               pending_exact = 0;
-              b += 3;
+              b += 1 + OFFSET_ADDRESS_SIZE;
 
               /* The alternative before this one has a jump after it
                  which gets executed if it gets matched.  Adjust that
@@ -2966,8 +3776,8 @@ regex_compile (pattern, size, syntax, bufp)
                  to be filled in later either by next alternative or
                  when know we're at the end of a series of alternatives.  */
               fixup_alt_jump = b;
-              GET_BUFFER_SPACE (3);
-              b += 3;
+              GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
+              b += 1 + OFFSET_ADDRESS_SIZE;
 
               laststart = 0;
               begalt = b;
@@ -2988,7 +3798,6 @@ regex_compile (pattern, size, syntax, bufp)
 
                 /* At least (most) this many matches must be made.  */
                 int lower_bound = -1, upper_bound = -1;
-
                 beg_interval = p - 1;
 
                 if (p == pend)
@@ -3054,12 +3863,15 @@ regex_compile (pattern, size, syntax, bufp)
 
                 /* If the upper bound is zero, don't want to succeed at
                    all; jump from `laststart' to `b + 3', which will be
-                   the end of the buffer after we insert the jump.  */
+		   the end of the buffer after we insert the jump.  */
+		/* ifdef MBS_SUPPORT, 'b + 1 + OFFSET_ADDRESS_SIZE'
+		   instead of 'b + 3'.  */
                  if (upper_bound == 0)
                    {
-                     GET_BUFFER_SPACE (3);
-                     INSERT_JUMP (jump, laststart, b + 3);
-                     b += 3;
+                     GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
+                     INSERT_JUMP (jump, laststart, b + 1
+				  + OFFSET_ADDRESS_SIZE);
+                     b += 1 + OFFSET_ADDRESS_SIZE;
                    }
 
                  /* Otherwise, we have a nontrivial interval.  When
@@ -3074,7 +3886,8 @@ regex_compile (pattern, size, syntax, bufp)
                  else
                    { /* If the upper bound is > 1, we need to insert
                         more at the end of the loop.  */
-                     unsigned nbytes = 10 + (upper_bound > 1) * 10;
+                     unsigned nbytes = 2 + 4 * OFFSET_ADDRESS_SIZE +
+		       (upper_bound > 1) * (2 + 4 * OFFSET_ADDRESS_SIZE);
 
                      GET_BUFFER_SPACE (nbytes);
 
@@ -3084,16 +3897,21 @@ regex_compile (pattern, size, syntax, bufp)
                         because `re_compile_fastmap' needs to know.
                         Jump to the `jump_n' we might insert below.  */
                      INSERT_JUMP2 (succeed_n, laststart,
-                                   b + 5 + (upper_bound > 1) * 5,
-                                   lower_bound);
-                     b += 5;
+                                   b + 1 + 2 * OFFSET_ADDRESS_SIZE
+				   + (upper_bound > 1) * (1 + 2 * OFFSET_ADDRESS_SIZE)
+				   , lower_bound);
+                     b += 1 + 2 * OFFSET_ADDRESS_SIZE;
 
                      /* Code to initialize the lower bound.  Insert
                         before the `succeed_n'.  The `5' is the last two
                         bytes of this `set_number_at', plus 3 bytes of
                         the following `succeed_n'.  */
-                     insert_op2 (set_number_at, laststart, 5, lower_bound, b);
-                     b += 5;
+		     /* ifdef MBS_SUPPORT, The '1+2*OFFSET_ADDRESS_SIZE'
+			is the 'set_number_at', plus '1+OFFSET_ADDRESS_SIZE'
+			of the following `succeed_n'.  */
+                     insert_op2 (set_number_at, laststart, 1
+				 + 2 * OFFSET_ADDRESS_SIZE, lower_bound, b);
+                     b += 1 + 2 * OFFSET_ADDRESS_SIZE;
 
                      if (upper_bound > 1)
                        { /* More than one repetition is allowed, so
@@ -3103,9 +3921,10 @@ regex_compile (pattern, size, syntax, bufp)
                             When we've reached this during matching,
                             we'll have matched the interval once, so
                             jump back only `upper_bound - 1' times.  */
-                         STORE_JUMP2 (jump_n, b, laststart + 5,
+                         STORE_JUMP2 (jump_n, b, laststart
+				      + 2 * OFFSET_ADDRESS_SIZE + 1,
                                       upper_bound - 1);
-                         b += 5;
+                         b += 1 + 2 * OFFSET_ADDRESS_SIZE;
 
                          /* The location we want to set is the second
                             parameter of the `jump_n'; that is `b-2' as
@@ -3123,7 +3942,7 @@ regex_compile (pattern, size, syntax, bufp)
                             reinitialize the bounds.  */
                          insert_op2 (set_number_at, laststart, b - laststart,
                                      upper_bound - 1, b);
-                         b += 5;
+                         b += 1 + 2 * OFFSET_ADDRESS_SIZE;
                        }
                    }
                 pending_exact = 0;
@@ -3262,6 +4081,11 @@ regex_compile (pattern, size, syntax, bufp)
 	normal_char:
 	      /* If no exactn currently being built.  */
           if (!pending_exact
+#ifdef MBS_SUPPORT
+	      /* If last exactn handle binary(or character) and
+		 new exactn handle character(or binary).  */
+	      || is_exactn_bin != is_binary[p - 1 - pattern]
+#endif /* MBS_SUPPORT */
 
               /* If last exactn not at current position.  */
               || pending_exact + *pending_exact + 1 != b
@@ -3283,7 +4107,16 @@ regex_compile (pattern, size, syntax, bufp)
 
               laststart = b;
 
+#ifdef MBS_SUPPORT
+	      /* Is this exactn binary data or character? */
+	      is_exactn_bin = is_binary[p - 1 - pattern];
+	      if (is_exactn_bin)
+		  BUF_PUSH_2 (exactn_bin, 0);
+	      else
+		  BUF_PUSH_2 (exactn, 0);
+#else
 	      BUF_PUSH_2 (exactn, 0);
+#endif /* MBS_SUPPORT */
 	      pending_exact = b - 1;
             }
 
@@ -3307,10 +4140,19 @@ regex_compile (pattern, size, syntax, bufp)
   if (syntax & RE_NO_POSIX_BACKTRACKING)
     BUF_PUSH (succeed);
 
+#ifdef MBS_SUPPORT
+  free (pattern);
+  free (mbs_offset);
+  free (is_binary);
+#endif
   free (compile_stack.stack);
 
   /* We have succeeded; set the length of the buffer.  */
+#ifdef MBS_SUPPORT
+  bufp->used = (int) b - (int) COMPILED_BUFFER_VAR;
+#else
   bufp->used = b - bufp->buffer;
+#endif
 
 #ifdef DEBUG
   if (debug)
@@ -3367,44 +4209,47 @@ regex_compile (pattern, size, syntax, bufp)
 /* Subroutines for `regex_compile'.  */
 
 /* Store OP at LOC followed by two-byte integer parameter ARG.  */
+/* ifdef MBS_SUPPORT, integer parameter is 1 wchar_t.  */
 
 static void
 store_op1 (op, loc, arg)
     re_opcode_t op;
-    unsigned char *loc;
+    US_CHAR_TYPE *loc;
     int arg;
 {
-  *loc = (unsigned char) op;
+  *loc = (US_CHAR_TYPE) op;
   STORE_NUMBER (loc + 1, arg);
 }
 
 
 /* Like `store_op1', but for two two-byte parameters ARG1 and ARG2.  */
+/* ifdef MBS_SUPPORT, integer parameter is 1 wchar_t.  */
 
 static void
 store_op2 (op, loc, arg1, arg2)
     re_opcode_t op;
-    unsigned char *loc;
+    US_CHAR_TYPE *loc;
     int arg1, arg2;
 {
-  *loc = (unsigned char) op;
+  *loc = (US_CHAR_TYPE) op;
   STORE_NUMBER (loc + 1, arg1);
-  STORE_NUMBER (loc + 3, arg2);
+  STORE_NUMBER (loc + 1 + OFFSET_ADDRESS_SIZE, arg2);
 }
 
 
 /* Copy the bytes from LOC to END to open up three bytes of space at LOC
    for OP followed by two-byte integer parameter ARG.  */
+/* ifdef MBS_SUPPORT, integer parameter is 1 wchar_t.  */
 
 static void
 insert_op1 (op, loc, arg, end)
     re_opcode_t op;
-    unsigned char *loc;
+    US_CHAR_TYPE *loc;
     int arg;
-    unsigned char *end;
+    US_CHAR_TYPE *end;
 {
-  register unsigned char *pfrom = end;
-  register unsigned char *pto = end + 3;
+  register US_CHAR_TYPE *pfrom = end;
+  register US_CHAR_TYPE *pto = end + 1 + OFFSET_ADDRESS_SIZE;
 
   while (pfrom != loc)
     *--pto = *--pfrom;
@@ -3414,16 +4259,17 @@ insert_op1 (op, loc, arg, end)
 
 
 /* Like `insert_op1', but for two two-byte parameters ARG1 and ARG2.  */
+/* ifdef MBS_SUPPORT, integer parameter is 1 wchar_t.  */
 
 static void
 insert_op2 (op, loc, arg1, arg2, end)
     re_opcode_t op;
-    unsigned char *loc;
+    US_CHAR_TYPE *loc;
     int arg1, arg2;
-    unsigned char *end;
+    US_CHAR_TYPE *end;
 {
-  register unsigned char *pfrom = end;
-  register unsigned char *pto = end + 5;
+  register US_CHAR_TYPE *pfrom = end;
+  register US_CHAR_TYPE *pto = end + 1 + 2 * OFFSET_ADDRESS_SIZE;
 
   while (pfrom != loc)
     *--pto = *--pfrom;
@@ -3438,10 +4284,10 @@ insert_op2 (op, loc, arg1, arg2, end)
 
 static boolean
 at_begline_loc_p (pattern, p, syntax)
-    const char *pattern, *p;
+    const CHAR_TYPE *pattern, *p;
     reg_syntax_t syntax;
 {
-  const char *prev = p - 2;
+  const CHAR_TYPE *prev = p - 2;
   boolean prev_prev_backslash = prev > pattern && prev[-1] == '\\';
 
   return
@@ -3457,12 +4303,12 @@ at_begline_loc_p (pattern, p, syntax)
 
 static boolean
 at_endline_loc_p (p, pend, syntax)
-    const char *p, *pend;
+    const CHAR_TYPE *p, *pend;
     reg_syntax_t syntax;
 {
-  const char *next = p;
+  const CHAR_TYPE *next = p;
   boolean next_backslash = *next == '\\';
-  const char *next_next = p + 1 < pend ? p + 1 : 0;
+  const CHAR_TYPE *next_next = p + 1 < pend ? p + 1 : 0;
 
   return
        /* Before a subexpression?  */
@@ -3493,7 +4339,97 @@ group_in_compile_stack (compile_stack, regnum)
   return false;
 }
 
+#ifdef MBS_SUPPORT
+/* This insert space into the pattern.  */
+static void
+insert_space (num, loc, end)
+     int num;
+     CHAR_TYPE *loc;
+     CHAR_TYPE *end;
+{
+  register CHAR_TYPE *pto = end;
+  register CHAR_TYPE *pfrom = end - num;
+
+  while (pfrom >= loc)
+    *pto-- = *pfrom--;
+}
+#endif /* MBS_SUPPORT */
+
+#ifdef MBS_SUPPORT
+static reg_errcode_t
+compile_range (range_start_char, p_ptr, pend, translate, syntax, b,
+	       char_set)
+     CHAR_TYPE range_start_char;
+     const CHAR_TYPE **p_ptr, *pend;
+     CHAR_TYPE *char_set, *b;
+     RE_TRANSLATE_TYPE translate;
+     reg_syntax_t syntax;
+{
+  const CHAR_TYPE *p = *p_ptr;
+  CHAR_TYPE range_start, range_end;
+  reg_errcode_t ret;
+# ifdef _LIBC
+  uint32_t nrules;
+  uint32_t start_val, end_val;
+# endif
+  if (p == pend)
+    return REG_ERANGE;
+
+# ifdef _LIBC
+  nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+  if (nrules != 0)
+    {
+      const char *collseq = (const char *) _NL_CURRENT(LC_COLLATE,
+						       _NL_COLLATE_COLLSEQWC);
+
+      if (range_start_char < -1)
+	{
+	  /* range_start is a collating symbol.  */
+	  int32_t *wextra;
+	  /* Retreive the index and get collation sequence value.  */
+	  wextra = (int32_t*)char_set[-range_start_char];
+	  start_val = wextra[1 + *wextra];
+	}
+      else
+	start_val = collseq_table_lookup(collseq, TRANSLATE(range_start_char));
+
+      end_val = collseq_table_lookup (collseq, TRANSLATE (p[0]));
+
+      /* Report an error if the range is empty and the syntax prohibits
+	 this.  */
+      ret = ((syntax & RE_NO_EMPTY_RANGES)
+	     && (start_val > end_val))? REG_ERANGE : REG_NOERROR;
+
+      /* Insert space to the end of the char_ranges.  */
+      insert_space(2, b - char_set[5] - 2, b - 1);
+      *(b - char_set[5] - 2) = (wchar_t)start_val;
+      *(b - char_set[5] - 1) = (wchar_t)end_val;
+      char_set[4]++; /* ranges_index */
+    }
+  else
+# endif
+    {
+      range_start = (range_start_char >= 0)? TRANSLATE (range_start_char):
+	range_start_char;
+      range_end = TRANSLATE (p[0]);
+      /* Report an error if the range is empty and the syntax prohibits
+	 this.  */
+      ret = ((syntax & RE_NO_EMPTY_RANGES)
+	     && (range_start > range_end))? REG_ERANGE : REG_NOERROR;
+
+      /* Insert space to the end of the char_ranges.  */
+      insert_space(2, b - char_set[5] - 2, b - 1);
+      *(b - char_set[5] - 2) = range_start;
+      *(b - char_set[5] - 1) = range_end;
+      char_set[4]++; /* ranges_index */
+    }
+  /* Have to increment the pointer into the pattern string, so the
+     caller isn't still at the ending character.  */
+  (*p_ptr)++;
 
+  return ret;
+}
+#else
 /* Read the ending character of a range (in a bracket expression) from the
    uncompiled pattern *P_PTR (which ends at PEND).  We assume the
    starting character is in `P[-2]'.  (`P[-1]' is the character `-'.)
@@ -3516,13 +4452,13 @@ compile_range (range_start_char, p_ptr, pend, translate, syntax, b)
   unsigned this_char;
   const char *p = *p_ptr;
   reg_errcode_t ret;
-#if _LIBC
+# if _LIBC
   const unsigned char *collseq;
   unsigned int start_colseq;
   unsigned int end_colseq;
-#else
+# else
   unsigned end_char;
-#endif
+# endif
 
   if (p == pend)
     return REG_ERANGE;
@@ -3534,7 +4470,7 @@ compile_range (range_start_char, p_ptr, pend, translate, syntax, b)
   /* Report an error if the range is empty and the syntax prohibits this.  */
   ret = syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR;
 
-#if _LIBC
+# if _LIBC
   collseq = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
 						 _NL_COLLATE_COLLSEQMB);
 
@@ -3550,21 +4486,28 @@ compile_range (range_start_char, p_ptr, pend, translate, syntax, b)
 	  ret = REG_NOERROR;
 	}
     }
-#else
+# else
   /* Here we see why `this_char' has to be larger than an `unsigned
      char' -- we would otherwise go into an infinite loop, since all
      characters <= 0xff.  */
   range_start_char = TRANSLATE (range_start_char);
-  end_char = TRANSLATE (p[0]);
+  /* TRANSLATE(p[0]) is casted to char (not unsigned char) in TRANSLATE,
+     and some compilers cast it to int implicitly, so following for_loop
+     may fall to (almost) infinite loop.
+     e.g. If translate[p[0]] = 0xff, end_char may equals to 0xffffffff.
+     To avoid this, we cast p[0] to unsigned int and truncate it.  */
+  end_char = ((unsigned)TRANSLATE(p[0]) & ((1 << BYTEWIDTH) - 1));
+
   for (this_char = range_start_char; this_char <= end_char; ++this_char)
     {
       SET_LIST_BIT (TRANSLATE (this_char));
       ret = REG_NOERROR;
     }
-#endif
+# endif
 
   return ret;
 }
+#endif /* MBS_SUPPORT */
 
 /* re_compile_fastmap computes a ``fastmap'' for the compiled pattern in
    BUFP.  A fastmap records which of the (1 << BYTEWIDTH) possible
@@ -3579,6 +4522,19 @@ compile_range (range_start_char, p_ptr, pend, translate, syntax, b)
 
    Returns 0 if we succeed, -2 if an internal error.   */
 
+#ifdef MBS_SUPPORT
+/* local function for re_compile_fastmap.
+   truncate wchar_t character to char.  */
+unsigned char
+truncate_wchar(c)
+     CHAR_TYPE c;
+{
+  unsigned char buf[MB_LEN_MAX];
+  int retval = wctomb(buf, c);
+  return retval > 0 ? buf[0] : (unsigned char)c;
+}
+#endif /* MBS_SUPPORT */
+
 int
 re_compile_fastmap (bufp)
      struct re_pattern_buffer *bufp;
@@ -3592,9 +4548,17 @@ re_compile_fastmap (bufp)
 #endif
 
   register char *fastmap = bufp->fastmap;
-  unsigned char *pattern = bufp->buffer;
-  unsigned char *p = pattern;
-  register unsigned char *pend = pattern + bufp->used;
+
+#ifdef MBS_SUPPORT
+  /* We need to cast pattern to (wchar_t*), because we casted this compiled
+     pattern to (char*) in regex_compile.  */
+  US_CHAR_TYPE *pattern = (US_CHAR_TYPE*)bufp->buffer;
+  register US_CHAR_TYPE *pend = (US_CHAR_TYPE*) (bufp->buffer + bufp->used);
+#else
+  US_CHAR_TYPE *pattern = bufp->buffer;
+  register US_CHAR_TYPE *pend = pattern + bufp->used;
+#endif /* MBS_SUPPORT */
+  US_CHAR_TYPE *p = pattern;
 
 #ifdef REL_ALLOC
   /* This holds the pointer to the failure stack, when
@@ -3657,11 +4621,30 @@ re_compile_fastmap (bufp)
       /* Following are the cases which match a character.  These end
          with `break'.  */
 
+#ifdef MBS_SUPPORT
+	case exactn:
+          fastmap[truncate_wchar(p[1])] = 1;
+	  break;
+	case exactn_bin:
+	  fastmap[p[1]] = 1;
+	  break;
+#else
 	case exactn:
           fastmap[p[1]] = 1;
 	  break;
+#endif /* MBS_SUPPORT */
 
 
+#ifdef MBS_SUPPORT
+        /* It is hard to distinguish fastmap from (multi byte) characters
+           which depends on current locale.  */
+        case charset:
+	case charset_not:
+	case wordchar:
+	case notwordchar:
+          bufp->can_be_null = 1;
+          goto done;
+#else
         case charset:
           for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--)
 	    if (p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH)))
@@ -3692,7 +4675,7 @@ re_compile_fastmap (bufp)
 	    if (SYNTAX (j) != Sword)
 	      fastmap[j] = 1;
 	  break;
-
+#endif
 
         case anychar:
 	  {
@@ -3822,13 +4805,13 @@ re_compile_fastmap (bufp)
 
 	case succeed_n:
           /* Get to the number of times to succeed.  */
-          p += 2;
+          p += OFFSET_ADDRESS_SIZE;
 
           /* Increment p past the n for when k != 0.  */
           EXTRACT_NUMBER_AND_INCR (k, p);
           if (k == 0)
 	    {
-              p -= 4;
+              p -= 2 * OFFSET_ADDRESS_SIZE;
   	      succeed_n_p = true;  /* Spaghetti code alert.  */
               goto handle_on_failure_jump;
             }
@@ -3836,7 +4819,7 @@ re_compile_fastmap (bufp)
 
 
 	case set_number_at:
-          p += 4;
+          p += 2 * OFFSET_ADDRESS_SIZE;
           continue;
 
 
@@ -3913,7 +4896,7 @@ weak_alias (__re_set_registers, re_set_registers)
 /* Searching routines.  */
 
 /* Like re_search_2, below, but only one string is specified, and
-   doesn't let you say where to stop matching. */
+   doesn't let you say where to stop matching.  */
 
 int
 re_search (bufp, string, size, startpos, range, regs)
@@ -4092,12 +5075,24 @@ re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop)
 weak_alias (__re_search_2, re_search_2)
 #endif
 
+#ifdef MBS_SUPPORT
+/* This converts PTR, a pointer into one of the search wchar_t strings
+   `string1' and `string2' into an multibyte string offset from the
+   beginning of that string. We use mbs_offset to optimize.
+   See convert_mbs_to_wcs.  */
+# define POINTER_TO_OFFSET(ptr)						\
+  (FIRST_STRING_P (ptr)							\
+   ? ((regoff_t)(mbs_offset1 != NULL? mbs_offset1[(ptr)-string1] : 0))	\
+   : ((regoff_t)((mbs_offset2 != NULL? mbs_offset2[(ptr)-string2] : 0)	\
+		 + csize1)))
+#else
 /* This converts PTR, a pointer into one of the search strings `string1'
    and `string2' into an offset from the beginning of that string.  */
-#define POINTER_TO_OFFSET(ptr)			\
+# define POINTER_TO_OFFSET(ptr)			\
   (FIRST_STRING_P (ptr)				\
    ? ((regoff_t) ((ptr) - string1))		\
    : ((regoff_t) ((ptr) - string2 + size1)))
+#endif /* MBS_SUPPORT */
 
 /* Macros for dealing with the split strings in re_match_2.  */
 
@@ -4127,10 +5122,17 @@ weak_alias (__re_search_2, re_search_2)
    two special cases to check for: if past the end of string1, look at
    the first character in string2; and if before the beginning of
    string2, look at the last character in string1.  */
-#define WORDCHAR_P(d)							\
+#ifdef MBS_SUPPORT
+/* Use internationalized API instead of SYNTAX.  */
+# define WORDCHAR_P(d)							\
+  (iswalnum ((wint_t)((d) == end1 ? *string2				\
+           : (d) == string2 - 1 ? *(end1 - 1) : *(d))) != 0)
+#else
+# define WORDCHAR_P(d)							\
   (SYNTAX ((d) == end1 ? *string2					\
            : (d) == string2 - 1 ? *(end1 - 1) : *(d))			\
    == Sword)
+#endif /* MBS_SUPPORT */
 
 /* Disabled due to a compiler bug -- see comment at case wordbound */
 #if 0
@@ -4144,7 +5146,28 @@ weak_alias (__re_search_2, re_search_2)
 /* Free everything we malloc.  */
 #ifdef MATCH_MAY_ALLOCATE
 # define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL
-# define FREE_VARIABLES()						\
+# ifdef MBS_SUPPORT
+#  define FREE_VARIABLES()						\
+  do {									\
+    REGEX_FREE_STACK (fail_stack.stack);				\
+    FREE_VAR (regstart);						\
+    FREE_VAR (regend);							\
+    FREE_VAR (old_regstart);						\
+    FREE_VAR (old_regend);						\
+    FREE_VAR (best_regstart);						\
+    FREE_VAR (best_regend);						\
+    FREE_VAR (reg_info);						\
+    FREE_VAR (reg_dummy);						\
+    FREE_VAR (reg_info_dummy);						\
+    FREE_VAR (string1);							\
+    FREE_VAR (string2);							\
+    FREE_VAR (mbs_offset1);						\
+    FREE_VAR (mbs_offset2);						\
+    FREE_VAR (is_binary1);						\
+    FREE_VAR (is_binary2);						\
+  } while (0)
+# else /* not MBS_SUPPORT */
+#  define FREE_VARIABLES()						\
   do {									\
     REGEX_FREE_STACK (fail_stack.stack);				\
     FREE_VAR (regstart);						\
@@ -4157,8 +5180,21 @@ weak_alias (__re_search_2, re_search_2)
     FREE_VAR (reg_dummy);						\
     FREE_VAR (reg_info_dummy);						\
   } while (0)
+# endif /* MBS_SUPPORT */
 #else
-# define FREE_VARIABLES() ((void)0) /* Do nothing!  But inhibit gcc warning. */
+# ifdef MBS_SUPPORT
+#  define FREE_VARIABLES()						\
+  do {									\
+    if (string1) free (string1);					\
+    if (string2) free (string2);					\
+    if (mbs_offset1) free (mbs_offset1);				\
+    if (mbs_offset2) free (mbs_offset2);				\
+    if (is_binary1) free (is_binary1);					\
+    if (is_binary2) free (is_binary2);					\
+  } while (0)
+# eles
+#  define FREE_VARIABLES() ((void)0) /* Do nothing!  But inhibit gcc warning. */
+# endif /* MBS_SUPPORT */
 #endif /* not MATCH_MAY_ALLOCATE */
 
 /* These values must meet several constraints.  They must not be valid
@@ -4197,16 +5233,16 @@ weak_alias (__re_match, re_match)
 # endif
 #endif /* not emacs */
 
-static boolean group_match_null_string_p _RE_ARGS ((unsigned char **p,
-						    unsigned char *end,
+static boolean group_match_null_string_p _RE_ARGS ((US_CHAR_TYPE **p,
+						    US_CHAR_TYPE *end,
 						register_info_type *reg_info));
-static boolean alt_match_null_string_p _RE_ARGS ((unsigned char *p,
-						  unsigned char *end,
+static boolean alt_match_null_string_p _RE_ARGS ((US_CHAR_TYPE *p,
+						  US_CHAR_TYPE *end,
 						register_info_type *reg_info));
-static boolean common_op_match_null_string_p _RE_ARGS ((unsigned char **p,
-							unsigned char *end,
+static boolean common_op_match_null_string_p _RE_ARGS ((US_CHAR_TYPE **p,
+							US_CHAR_TYPE *end,
 						register_info_type *reg_info));
-static int bcmp_translate _RE_ARGS ((const char *s1, const char *s2,
+static int bcmp_translate _RE_ARGS ((const CHAR_TYPE *s1, const CHAR_TYPE *s2,
 				     int len, char *translate));
 
 /* re_match_2 matches the compiled pattern in BUFP against the
@@ -4244,38 +5280,93 @@ re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop)
 weak_alias (__re_match_2, re_match_2)
 #endif
 
+#ifdef MBS_SUPPORT
+/* This check the substring (from 0, to length) of the multibyte string,
+   to which offset_buffer correspond. And count how many wchar_t_characters
+   the substring occupy. We use offset_buffer to optimization.
+   See convert_mbs_to_wcs.  */
+static int
+count_mbs_length(offset_buffer, length)
+     int *offset_buffer;
+     int length;
+{
+  int wcs_size;
+
+  /* Check whether the size is valid.  */
+  if (length < 0)
+    return -1;
+
+  if (offset_buffer == NULL)
+    return 0;
+
+  for (wcs_size = 0 ; offset_buffer[wcs_size] != -1 ; wcs_size++)
+    {
+      if (offset_buffer[wcs_size] == length)
+	return wcs_size;
+      if (offset_buffer[wcs_size] > length)
+	/* It is a fragment of a wide character.  */
+	return -1;
+    }
+
+  /* We reached at the sentinel.  */
+  return -1;
+}
+#endif /* MBS_SUPPORT */
+
 /* This is a separate function so that we can force an alloca cleanup
    afterwards.  */
 static int
+#ifdef MBS_SUPPORT
+re_match_2_internal (bufp, cstring1, csize1, cstring2, csize2, pos, regs, stop)
+     struct re_pattern_buffer *bufp;
+     const char *cstring1, *cstring2;
+     int csize1, csize2;
+#else
 re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      struct re_pattern_buffer *bufp;
      const char *string1, *string2;
      int size1, size2;
+#endif
      int pos;
      struct re_registers *regs;
      int stop;
 {
   /* General temporaries.  */
   int mcnt;
-  unsigned char *p1;
+  US_CHAR_TYPE *p1;
+#ifdef MBS_SUPPORT
+  /* We need wchar_t* buffers correspond to string1, string2.  */
+  CHAR_TYPE *string1 = NULL, *string2 = NULL;
+  /* We need the size of wchar_t buffers correspond to csize1, csize2.  */
+  int size1 = 0, size2 = 0;
+  /* offset buffer for optimizatoin. See convert_mbs_to_wc.  */
+  int *mbs_offset1 = NULL, *mbs_offset2 = NULL;
+  /* They hold whether each wchar_t is binary data or not.  */
+  int *is_binary1 = NULL, *is_binary2 = NULL;
+#endif /* MBS_SUPPORT */
 
   /* Just past the end of the corresponding string.  */
-  const char *end1, *end2;
+  const CHAR_TYPE *end1, *end2;
 
   /* Pointers into string1 and string2, just past the last characters in
      each to consider matching.  */
-  const char *end_match_1, *end_match_2;
+  const CHAR_TYPE *end_match_1, *end_match_2;
 
   /* Where we are in the data, and the end of the current string.  */
-  const char *d, *dend;
+  const CHAR_TYPE *d, *dend;
 
   /* Where we are in the pattern, and the end of the pattern.  */
-  unsigned char *p = bufp->buffer;
-  register unsigned char *pend = p + bufp->used;
+#ifdef MBS_SUPPORT
+  US_CHAR_TYPE *pattern, *p;
+  register US_CHAR_TYPE *pend;
+#else
+  US_CHAR_TYPE *p = bufp->buffer;
+  register US_CHAR_TYPE *pend = p + bufp->used;
+#endif /* MBS_SUPPORT */
 
   /* Mark the opcode just after a start_memory, so we can test for an
      empty subpattern when we get to the stop_memory.  */
-  unsigned char *just_past_start_mem = 0;
+  US_CHAR_TYPE *just_past_start_mem = 0;
 
   /* We use this to map every character in the string.  */
   RE_TRANSLATE_TYPE translate = bufp->translate;
@@ -4320,7 +5411,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      stopped matching the regnum-th subexpression.  (The zeroth register
      keeps track of what the whole pattern matches.)  */
 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global.  */
-  const char **regstart, **regend;
+  const CHAR_TYPE **regstart, **regend;
 #endif
 
   /* If a group that's operated upon by a repetition operator fails to
@@ -4329,7 +5420,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      are when we last see its open-group operator.  Similarly for a
      register's end.  */
 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global.  */
-  const char **old_regstart, **old_regend;
+  const CHAR_TYPE **old_regstart, **old_regend;
 #endif
 
   /* The is_active field of reg_info helps us keep track of which (possibly
@@ -4348,7 +5439,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      turn happens only if we have not yet matched the entire string. */
   unsigned best_regs_set = false;
 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global.  */
-  const char **best_regstart, **best_regend;
+  const CHAR_TYPE **best_regstart, **best_regend;
 #endif
 
   /* Logically, this is `best_regend[0]'.  But we don't want to have to
@@ -4359,14 +5450,14 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      the end of the best match so far in a separate variable.  We
      initialize this to NULL so that when we backtrack the first time
      and need to test it, it's not garbage.  */
-  const char *match_end = NULL;
+  const CHAR_TYPE *match_end = NULL;
 
   /* This helps SET_REGS_MATCHED avoid doing redundant work.  */
   int set_regs_matched_done = 0;
 
   /* Used when we pop values we don't care about.  */
 #ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global.  */
-  const char **reg_dummy;
+  const CHAR_TYPE **reg_dummy;
   register_info_type *reg_info_dummy;
 #endif
 
@@ -4387,14 +5478,14 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      array indexing.  We should fix this.  */
   if (bufp->re_nsub)
     {
-      regstart = REGEX_TALLOC (num_regs, const char *);
-      regend = REGEX_TALLOC (num_regs, const char *);
-      old_regstart = REGEX_TALLOC (num_regs, const char *);
-      old_regend = REGEX_TALLOC (num_regs, const char *);
-      best_regstart = REGEX_TALLOC (num_regs, const char *);
-      best_regend = REGEX_TALLOC (num_regs, const char *);
+      regstart = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
+      regend = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
+      old_regstart = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
+      old_regend = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
+      best_regstart = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
+      best_regend = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
       reg_info = REGEX_TALLOC (num_regs, register_info_type);
-      reg_dummy = REGEX_TALLOC (num_regs, const char *);
+      reg_dummy = REGEX_TALLOC (num_regs, const CHAR_TYPE *);
       reg_info_dummy = REGEX_TALLOC (num_regs, register_info_type);
 
       if (!(regstart && regend && old_regstart && old_regend && reg_info
@@ -4415,12 +5506,62 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 #endif /* MATCH_MAY_ALLOCATE */
 
   /* The starting position is bogus.  */
+#ifdef MBS_SUPPORT
+  if (pos < 0 || pos > csize1 + csize2)
+#else
   if (pos < 0 || pos > size1 + size2)
+#endif
     {
       FREE_VARIABLES ();
       return -1;
     }
 
+#ifdef MBS_SUPPORT
+  /* Allocate wchar_t array for string1 and string2 and
+     fill them with converted string.  */
+  if (csize1 != 0)
+    {
+      string1 = TALLOC (csize1 + 1, CHAR_TYPE);
+      mbs_offset1 = TALLOC (csize1 + 1, int);
+      is_binary1 = TALLOC (csize1 + 1, int);
+      if (!string1 || !mbs_offset1 || !is_binary1)
+	{
+	  if (string1) free(string1);
+	  if (mbs_offset1) free(mbs_offset1);
+	  if (is_binary1) free(is_binary1);
+	  return -2;
+	}
+      size1 = convert_mbs_to_wcs(string1, cstring1, csize1,
+				 mbs_offset1, is_binary1);
+      string1[size1] = L'\0'; /* for a sentinel  */
+    }
+  if (csize2 != 0)
+    {
+      string2 = REGEX_TALLOC (csize2 + 1, CHAR_TYPE);
+      mbs_offset2 = REGEX_TALLOC (csize2 + 1, int);
+      is_binary2 = TALLOC (csize2 + 1, int);
+      if (!string2 || !mbs_offset2 || !is_binary2)
+	{
+	  if (string1) free(string1);
+	  if (mbs_offset1) free(mbs_offset1);
+	  if (is_binary1) free(is_binary1);
+	  if (string2) free(string2);
+	  if (mbs_offset2) free(mbs_offset2);
+	  if (is_binary2) free(is_binary2);
+	  return -2;
+	}
+      size2 = convert_mbs_to_wcs(string2, cstring2, csize2,
+				 mbs_offset2, is_binary2);
+      string2[size2] = L'\0'; /* for a sentinel  */
+    }
+
+  /* We need to cast pattern to (wchar_t*), because we casted this compiled
+     pattern to (char*) in regex_compile.  */
+  p = pattern = (CHAR_TYPE*)bufp->buffer;
+  pend = (CHAR_TYPE*)(bufp->buffer + bufp->used);
+
+#endif /* MBS_SUPPORT */
+
   /* Initialize subexpression text positions to -1 to mark ones that no
      start_memory/stop_memory has been seen for. Also initialize the
      register information struct.  */
@@ -4448,6 +5589,25 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
   end2 = string2 + size2;
 
   /* Compute where to stop matching, within the two strings.  */
+#ifdef MBS_SUPPORT
+  if (stop <= csize1)
+    {
+      mcnt = count_mbs_length(mbs_offset1, stop);
+      end_match_1 = string1 + mcnt;
+      end_match_2 = string2;
+    }
+  else
+    {
+      end_match_1 = end1;
+      mcnt = count_mbs_length(mbs_offset2, stop-csize1);
+      end_match_2 = string2 + mcnt;
+    }
+  if (mcnt < 0)
+    { /* count_mbs_length return error.  */
+      FREE_VARIABLES ();
+      return -1;
+    }
+#else
   if (stop <= size1)
     {
       end_match_1 = string1 + stop;
@@ -4458,6 +5618,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
       end_match_1 = end1;
       end_match_2 = string2 + stop - size1;
     }
+#endif /* MBS_SUPPORT */
 
   /* `p' scans through the pattern as `d' scans through the data.
      `dend' is the end of the input string that `d' points within.  `d'
@@ -4465,6 +5626,26 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
      this happens before fetching; therefore, at the beginning of the
      loop, `d' can be pointing at the end of a string, but it cannot
      equal `string2'.  */
+#ifdef MBS_SUPPORT
+  if (size1 > 0 && pos <= csize1)
+    {
+      mcnt = count_mbs_length(mbs_offset1, pos);
+      d = string1 + mcnt;
+      dend = end_match_1;
+    }
+  else
+    {
+      mcnt = count_mbs_length(mbs_offset2, pos-csize1);
+      d = string2 + mcnt;
+      dend = end_match_2;
+    }
+
+  if (mcnt < 0)
+    { /* count_mbs_length return error.  */
+      FREE_VARIABLES ();
+      return -1;
+    }
+#else
   if (size1 > 0 && pos <= size1)
     {
       d = string1 + pos;
@@ -4475,6 +5656,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
       d = string2 + pos - size1;
       dend = end_match_2;
     }
+#endif /* MBS_SUPPORT */
 
   DEBUG_PRINT1 ("The compiled pattern is:\n");
   DEBUG_PRINT_COMPILED_PATTERN (bufp, p, pend);
@@ -4564,11 +5746,10 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 
 	succeed_label:
           DEBUG_PRINT1 ("Accepting match.\n");
-
           /* If caller wants register contents data back, do it.  */
           if (regs && !bufp->no_sub)
 	    {
-              /* Have the register data arrays been allocated?  */
+	      /* Have the register data arrays been allocated?  */
               if (bufp->regs_allocated == REGS_UNALLOCATED)
                 { /* No.  So allocate them with malloc.  We need one
                      extra element beyond `num_regs' for the `-1' marker
@@ -4612,9 +5793,18 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
               if (regs->num_regs > 0)
                 {
                   regs->start[0] = pos;
+#ifdef MBS_SUPPORT
+		  if (MATCHING_IN_FIRST_STRING)
+		    regs->end[0] = mbs_offset1 != NULL ?
+					mbs_offset1[d-string1] : 0;
+		  else
+		    regs->end[0] = csize1 + (mbs_offset2 != NULL ?
+					     mbs_offset2[d-string2] : 0);
+#else
                   regs->end[0] = (MATCHING_IN_FIRST_STRING
 				  ? ((regoff_t) (d - string1))
 			          : ((regoff_t) (d - string2 + size1)));
+#endif /* MBS_SUPPORT */
                 }
 
               /* Go through the first `min (num_regs, regs->num_regs)'
@@ -4647,9 +5837,18 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                         nfailure_points_pushed - nfailure_points_popped);
           DEBUG_PRINT2 ("%u registers pushed.\n", num_regs_pushed);
 
+#ifdef MBS_SUPPORT
+	  if (MATCHING_IN_FIRST_STRING)
+	    mcnt = mbs_offset1 != NULL ? mbs_offset1[d-string1] : 0;
+	  else
+	    mcnt = (mbs_offset2 != NULL ? mbs_offset2[d-string2] : 0) +
+			csize1;
+          mcnt -= pos;
+#else
           mcnt = d - pos - (MATCHING_IN_FIRST_STRING
 			    ? string1
 			    : string2 - size1);
+#endif /* MBS_SUPPORT */
 
           DEBUG_PRINT2 ("Returning %d from re_match_2.\n", mcnt);
 
@@ -4674,6 +5873,9 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
            byte in the pattern defines n, and the n bytes after that
            are the characters to match.  */
 	case exactn:
+#ifdef MBS_SUPPORT
+	case exactn_bin:
+#endif
 	  mcnt = *p++;
           DEBUG_PRINT2 ("EXECUTING exactn %d.\n", mcnt);
 
@@ -4684,9 +5886,23 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 	      do
 		{
 		  PREFETCH ();
-		  if ((unsigned char) translate[(unsigned char) *d++]
-		      != (unsigned char) *p++)
+#ifdef MBS_SUPPORT
+		  if (*d <= 0xff)
+		    {
+		      if ((US_CHAR_TYPE) translate[(unsigned char) *d++]
+			  != (US_CHAR_TYPE) *p++)
+			goto fail;
+		    }
+		  else
+		    {
+		      if (*d++ != (CHAR_TYPE) *p++)
+			goto fail;
+		    }
+#else
+		  if ((US_CHAR_TYPE) translate[(unsigned char) *d++]
+		      != (US_CHAR_TYPE) *p++)
                     goto fail;
+#endif /* MBS_SUPPORT */
 		}
 	      while (--mcnt);
 	    }
@@ -4695,7 +5911,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 	      do
 		{
 		  PREFETCH ();
-		  if (*d++ != (char) *p++) goto fail;
+		  if (*d++ != (CHAR_TYPE) *p++) goto fail;
 		}
 	      while (--mcnt);
 	    }
@@ -4722,14 +5938,347 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 	case charset:
 	case charset_not:
 	  {
-	    register unsigned char c;
+	    register US_CHAR_TYPE c;
+#ifdef MBS_SUPPORT
+	    unsigned int i, char_class_length, coll_symbol_length,
+              equiv_class_length, ranges_length, chars_length, length;
+	    CHAR_TYPE *workp, *workp2, *charset_top;
+#define WORK_BUFFER_SIZE 128
+            CHAR_TYPE str_buf[WORK_BUFFER_SIZE];
+# ifdef _LIBC
+	    uint32_t nrules;
+# endif /* _LIBC */
+#endif /* MBS_SUPPORT */
 	    boolean not = (re_opcode_t) *(p - 1) == charset_not;
 
             DEBUG_PRINT2 ("EXECUTING charset%s.\n", not ? "_not" : "");
-
 	    PREFETCH ();
 	    c = TRANSLATE (*d); /* The character to match.  */
+#ifdef MBS_SUPPORT
+# ifdef _LIBC
+	    nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
+# endif /* _LIBC */
+	    charset_top = p - 1;
+	    char_class_length = *p++;
+	    coll_symbol_length = *p++;
+	    equiv_class_length = *p++;
+	    ranges_length = *p++;
+	    chars_length = *p++;
+	    /* p points charset[6], so the address of the next instruction
+	       (charset[l+m+n+2o+k+p']) equals p[l+m+n+2*o+p'],
+	       where l=length of char_classes, m=length of collating_symbol,
+	       n=equivalence_class, o=length of char_range,
+	       p'=length of character.  */
+	    workp = p;
+	    /* Update p to indicate the next instruction.  */
+	    p += char_class_length + coll_symbol_length+ equiv_class_length +
+              2*ranges_length + chars_length;
+
+            /* match with char_class?  */
+	    for (i = 0; i < char_class_length ; i++)
+              if (iswctype((wint_t)c, (wctype_t)(*workp++)))
+                goto char_set_matched;
+
+            /* match with collating_symbol?  */
+# ifdef _LIBC
+	    if (nrules != 0)
+	      {
+		for (workp2 = workp + coll_symbol_length ; workp < workp2 ;
+		     workp++)
+		  {
+		    int32_t *wextra;
+		    wextra = (int32_t*) *workp++;
+		    for (i = 0; i < *wextra; ++i)
+		      if (TRANSLATE(d[i]) != wextra[1 + i])
+			break;
 
+		    if (i == *wextra)
+		      {
+			/* Update d, however d will be incremented at
+			   char_set_matched:, we decrement d here.  */
+			d += i - 1;
+			goto char_set_matched;
+		      }
+		  }
+	      }
+	    else /* (nrules == 0) */
+# endif
+	      /* If we can't look up collation data, we use wcscoll
+		 instead.  */
+	      {
+		for (workp2 = workp + coll_symbol_length ; workp < workp2 ;)
+		  {
+		    const CHAR_TYPE *backup_d = d, *backup_dend = dend;
+		    length = wcslen(workp);
+
+		    /* If wcscoll(the collating symbol, whole string) > 0,
+		       any substring of the string never match with the
+		       collating symbol.  */
+		    if (wcscoll(workp, d) > 0)
+		      {
+			workp += length + 1;
+			continue;
+		      }
+
+		    /* First, we compare the collating symbol with
+		       the first character of the string.
+		       If it don't match, we add the next character to
+		       the compare buffer in turn.  */
+		    for (i = 0 ; i < WORK_BUFFER_SIZE-1 ; i++, d++)
+		      {
+			int match;
+			if (d == dend)
+			  {
+			    if (dend == end_match_2)
+			      break;
+			    d = string2;
+			    dend = end_match_2;
+			  }
+
+			/* add next character to the compare buffer.  */
+			str_buf[i] = TRANSLATE(*d);
+			str_buf[i+1] = '\0';
+
+			match = wcscoll(workp, str_buf);
+			if (match == 0)
+			  goto char_set_matched;
+
+			if (match < 0)
+			  /* (str_buf > workp) indicate (str_buf + X > workp),
+			     because for all X (str_buf + X > str_buf).
+			     So we don't need continue this loop.  */
+			  break;
+
+			/* Otherwise(str_buf < workp),
+			   (str_buf+next_character) may equals (workp).
+			   So we continue this loop.  */
+		      }
+		    /* not matched */
+		    d = backup_d;
+		    dend = backup_dend;
+		    workp += length + 1;
+		  }
+              }
+            /* match with equivalence_class?  */
+# ifdef _LIBC
+	    if (nrules != 0)
+	      {
+                const CHAR_TYPE *backup_d = d, *backup_dend = dend;
+		/* Try to match the equivalence class against
+		   those known to the collate implementation.  */
+		const int32_t *table;
+		const int32_t *weights;
+		const int32_t *extra;
+		const int32_t *indirect;
+		int32_t idx, idx2;
+		wint_t *cp;
+		size_t len;
+
+		/* This #include defines a local function!  */
+#  include <locale/weightwc.h>
+
+		table = (const int32_t *)
+		  _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEWC);
+		weights = (const wint_t *)
+		  _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTWC);
+		extra = (const wint_t *)
+		  _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAWC);
+		indirect = (const int32_t *)
+		  _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTWC);
+
+		/* Write 1 collating element to str_buf, and
+		   get its index.  */
+		idx2 = 0;
+
+		for (i = 0 ; idx2 == 0 && i < WORK_BUFFER_SIZE - 1; i++)
+		  {
+		    cp = (wint_t*)str_buf;
+		    if (d == dend)
+		      {
+			if (dend == end_match_2)
+			  break;
+			d = string2;
+			dend = end_match_2;
+		      }
+		    str_buf[i] = TRANSLATE(*(d+i));
+		    str_buf[i+1] = '\0'; /* sentinel */
+		    idx2 = findidx ((const wint_t**)&cp);
+		  }
+
+		/* Update d, however d will be incremented at
+		   char_set_matched:, we decrement d here.  */
+		d = backup_d + (wint_t)cp - (wint_t)str_buf - 1;
+		if (d >= dend)
+		  {
+		    if (dend == end_match_2)
+			d = dend;
+		    else
+		      {
+			d = string2;
+			dend = end_match_2;
+		      }
+		  }
+
+		len = weights[idx2];
+
+		for (workp2 = workp + equiv_class_length ; workp < workp2 ;
+		     workp++)
+		  {
+		    idx = (int32_t)*workp;
+		    /* We already checked idx != 0 in regex_compile. */
+
+		    if (idx2 != 0 && len == weights[idx])
+		      {
+			int cnt = 0;
+			while (cnt < len && (weights[idx + 1 + cnt]
+					     == weights[idx2 + 1 + cnt]))
+			  ++cnt;
+
+			if (cnt == len)
+			  goto char_set_matched;
+		      }
+		  }
+		/* not matched */
+                d = backup_d;
+                dend = backup_dend;
+	      }
+	    else /* (nrules == 0) */
+# endif
+	      /* If we can't look up collation data, we use wcscoll
+		 instead.  */
+	      {
+		for (workp2 = workp + equiv_class_length ; workp < workp2 ;)
+		  {
+		    const CHAR_TYPE *backup_d = d, *backup_dend = dend;
+		    length = wcslen(workp);
+
+		    /* If wcscoll(the collating symbol, whole string) > 0,
+		       any substring of the string never match with the
+		       collating symbol.  */
+		    if (wcscoll(workp, d) > 0)
+		      {
+			workp += length + 1;
+			break;
+		      }
+
+		    /* First, we compare the equivalence class with
+		       the first character of the string.
+		       If it don't match, we add the next character to
+		       the compare buffer in turn.  */
+		    for (i = 0 ; i < WORK_BUFFER_SIZE - 1 ; i++, d++)
+		      {
+			int match;
+			if (d == dend)
+			  {
+			    if (dend == end_match_2)
+			      break;
+			    d = string2;
+			    dend = end_match_2;
+			  }
+
+			/* add next character to the compare buffer.  */
+			str_buf[i] = TRANSLATE(*d);
+			str_buf[i+1] = '\0';
+
+			match = wcscoll(workp, str_buf);
+
+			if (match == 0)
+			  goto char_set_matched;
+
+			if (match < 0)
+			/* (str_buf > workp) indicate (str_buf + X > workp),
+			   because for all X (str_buf + X > str_buf).
+			   So we don't need continue this loop.  */
+			  break;
+
+			/* Otherwise(str_buf < workp),
+			   (str_buf+next_character) may equals (workp).
+			   So we continue this loop.  */
+		      }
+		    /* not matched */
+		    d = backup_d;
+		    dend = backup_dend;
+		    workp += length + 1;
+		  }
+	      }
+
+            /* match with char_range?  */
+#ifdef _LIBC
+	    if (nrules != 0)
+	      {
+		uint32_t collseqval;
+		const char *collseq = (const char *)
+		  _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQWC);
+
+		collseqval = collseq_table_lookup (collseq, c);
+
+		for (; workp < p - chars_length ;)
+		  {
+		    uint32_t start_val, end_val;
+
+		    /* We already compute the collation sequence value
+		       of the characters (or collating symbols).  */
+		    start_val = (uint32_t) *workp++; /* range_start */
+		    end_val = (uint32_t) *workp++; /* range_end */
+
+		    if (start_val <= collseqval && collseqval <= end_val)
+		      goto char_set_matched;
+		  }
+	      }
+	    else
+#endif
+	      {
+		/* We set range_start_char at str_buf[0], range_end_char
+		   at str_buf[4], and compared char at str_buf[2].  */
+		str_buf[1] = 0;
+		str_buf[2] = c;
+		str_buf[3] = 0;
+		str_buf[5] = 0;
+		for (; workp < p - chars_length ;)
+		  {
+		    wchar_t *range_start_char, *range_end_char;
+
+		    /* match if (range_start_char <= c <= range_end_char).  */
+
+		    /* If range_start(or end) < 0, we assume -range_start(end)
+		       is the offset of the collating symbol which is specified
+		       as the character of the range start(end).  */
+
+		    /* range_start */
+		    if (*workp < 0)
+		      range_start_char = charset_top - (*workp++);
+		    else
+		      {
+			str_buf[0] = *workp++;
+			range_start_char = str_buf;
+		      }
+
+		    /* range_end */
+		    if (*workp < 0)
+		      range_end_char = charset_top - (*workp++);
+		    else
+		      {
+			str_buf[4] = *workp++;
+			range_end_char = str_buf + 4;
+		      }
+
+		    if (wcscoll(range_start_char, str_buf+2) <= 0 &&
+			wcscoll(str_buf+2, range_end_char) <= 0)
+
+		      goto char_set_matched;
+		  }
+	      }
+
+            /* match with char?  */
+	    for (; workp < p ; workp++)
+	      if (c == *workp)
+		goto char_set_matched;
+
+	    not = !not;
+
+	  char_set_matched:
+	    if (not) goto fail;
+#else
             /* Cast to `unsigned' instead of `unsigned char' in case the
                bit list is a full 32 bytes long.  */
 	    if (c < (unsigned) (*p * BYTEWIDTH)
@@ -4739,7 +6288,8 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 	    p += 1 + *p;
 
 	    if (!not) goto fail;
-
+#undef WORK_BUFFER_SIZE
+#endif /* MBS_SUPPORT */
 	    SET_REGS_MATCHED ();
             d++;
 	    break;
@@ -4834,7 +6384,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                  it isn't necessarily one less than now: consider
                  (a(b)c(d(e)f)g).  When group 3 ends, after the f), the
                  new highest active register is 1.  */
-              unsigned char r = *p - 1;
+              US_CHAR_TYPE r = *p - 1;
               while (r > 0 && !IS_ACTIVE (reg_info[r]))
                 r--;
 
@@ -4877,7 +6427,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 		  case dummy_failure_jump:
                     EXTRACT_NUMBER_AND_INCR (mcnt, p1);
 		    if (is_a_jump_n)
-		      p1 += 2;
+		      p1 += OFFSET_ADDRESS_SIZE;
                     break;
 
                   default:
@@ -4891,7 +6441,8 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                  by forcing a failure after pushing on the stack the
                  on_failure_jump's jump in the pattern, and d.  */
               if (mcnt < 0 && (re_opcode_t) *p1 == on_failure_jump
-                  && (re_opcode_t) p1[3] == start_memory && p1[4] == *p)
+                  && (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == start_memory
+		  && p1[2+OFFSET_ADDRESS_SIZE] == *p)
 		{
                   /* If this group ever matched anything, then restore
                      what its registers were before trying this last
@@ -4937,7 +6488,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
            followed by the numeric value of <digit> as the register number.  */
         case duplicate:
 	  {
-	    register const char *d2, *dend2;
+	    register const CHAR_TYPE *d2, *dend2;
 	    int regno = *p++;   /* Get which register to match against.  */
 	    DEBUG_PRINT2 ("EXECUTING duplicate %d.\n", regno);
 
@@ -4987,7 +6538,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                    past them.  */
 		if (translate
                     ? bcmp_translate (d, d2, mcnt, translate)
-                    : memcmp (d, d2, mcnt))
+                    : memcmp (d, d2, mcnt*sizeof(US_CHAR_TYPE)))
 		  goto fail;
 		d += mcnt, d2 += mcnt;
 
@@ -5143,7 +6694,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
           EXTRACT_NUMBER_AND_INCR (mcnt, p);
           DEBUG_PRINT2 ("EXECUTING maybe_pop_jump %d.\n", mcnt);
           {
-	    register unsigned char *p2 = p;
+	    register US_CHAR_TYPE *p2 = p;
 
             /* Compare the beginning of the repeat with what in the
                pattern follows its end. If we can establish that there
@@ -5168,9 +6719,9 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 		    && ((re_opcode_t) *p2 == stop_memory
 			|| (re_opcode_t) *p2 == start_memory))
 		  p2 += 3;
-		else if (p2 + 6 < pend
+		else if (p2 + 2 + 2 * OFFSET_ADDRESS_SIZE < pend
 			 && (re_opcode_t) *p2 == dummy_failure_jump)
-		  p2 += 6;
+		  p2 += 2 + 2 * OFFSET_ADDRESS_SIZE;
 		else
 		  break;
 	      }
@@ -5186,24 +6737,34 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 		/* Consider what happens when matching ":\(.*\)"
 		   against ":/".  I don't really understand this code
 		   yet.  */
-  	        p[-3] = (unsigned char) pop_failure_jump;
+  	        p[-(1+OFFSET_ADDRESS_SIZE)] = (US_CHAR_TYPE)
+		  pop_failure_jump;
                 DEBUG_PRINT1
                   ("  End of pattern: change to `pop_failure_jump'.\n");
               }
 
             else if ((re_opcode_t) *p2 == exactn
+#ifdef MBS_SUPPORT
+		     || (re_opcode_t) *p2 == exactn_bin
+#endif
 		     || (bufp->newline_anchor && (re_opcode_t) *p2 == endline))
 	      {
-		register unsigned char c
-                  = *p2 == (unsigned char) endline ? '\n' : p2[2];
+		register US_CHAR_TYPE c
+                  = *p2 == (US_CHAR_TYPE) endline ? '\n' : p2[2];
 
-                if ((re_opcode_t) p1[3] == exactn && p1[5] != c)
+                if (((re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn
+#ifdef MBS_SUPPORT
+		     || (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn_bin
+#endif
+		    ) && p1[3+OFFSET_ADDRESS_SIZE] != c)
                   {
-  		    p[-3] = (unsigned char) pop_failure_jump;
+  		    p[-(1+OFFSET_ADDRESS_SIZE)] = (US_CHAR_TYPE)
+		      pop_failure_jump;
                     DEBUG_PRINT3 ("  %c != %c => pop_failure_jump.\n",
-                                  c, p1[5]);
+                                  c, p1[3+OFFSET_ADDRESS_SIZE]);
                   }
 
+#ifndef MBS_SUPPORT
 		else if ((re_opcode_t) p1[3] == charset
 			 || (re_opcode_t) p1[3] == charset_not)
 		  {
@@ -5221,7 +6782,9 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                         DEBUG_PRINT1 ("  No match => pop_failure_jump.\n");
                       }
 		  }
+#endif /* not MBS_SUPPORT */
 	      }
+#ifndef MBS_SUPPORT
             else if ((re_opcode_t) *p2 == charset)
 	      {
 		/* We win if the first character of the loop is not part
@@ -5270,11 +6833,12 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                       }
 		  }
 	      }
+#endif /* not MBS_SUPPORT */
 	  }
-	  p -= 2;		/* Point at relative address again.  */
+	  p -= OFFSET_ADDRESS_SIZE;	/* Point at relative address again.  */
 	  if ((re_opcode_t) p[-1] != pop_failure_jump)
 	    {
-	      p[-1] = (unsigned char) jump;
+	      p[-1] = (US_CHAR_TYPE) jump;
               DEBUG_PRINT1 ("  Match => jump.\n");
 	      goto unconditional_jump;
 	    }
@@ -5295,8 +6859,8 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
                register from the stack, since lowest will == highest in
                `pop_failure_point'.  */
             active_reg_t dummy_low_reg, dummy_high_reg;
-            unsigned char *pdummy;
-            const char *sdummy;
+            US_CHAR_TYPE *pdummy = NULL;
+            const CHAR_TYPE *sdummy = NULL;
 
             DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n");
             POP_FAILURE_POINT (sdummy, pdummy,
@@ -5361,7 +6925,7 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
         /* Have to succeed matching what follows at least n times.
            After that, handle like `on_failure_jump'.  */
         case succeed_n:
-          EXTRACT_NUMBER (mcnt, p + 2);
+          EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE);
           DEBUG_PRINT2 ("EXECUTING succeed_n %d.\n", mcnt);
 
           assert (mcnt >= 0);
@@ -5369,46 +6933,58 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
           if (mcnt > 0)
             {
                mcnt--;
-	       p += 2;
+	       p += OFFSET_ADDRESS_SIZE;
                STORE_NUMBER_AND_INCR (p, mcnt);
 #ifdef _LIBC
-               DEBUG_PRINT3 ("  Setting %p to %d.\n", p - 2, mcnt);
+               DEBUG_PRINT3 ("  Setting %p to %d.\n", p - OFFSET_ADDRESS_SIZE
+			     , mcnt);
 #else
-               DEBUG_PRINT3 ("  Setting 0x%x to %d.\n", p - 2, mcnt);
+               DEBUG_PRINT3 ("  Setting 0x%x to %d.\n", p - OFFSET_ADDRESS_SIZE
+			     , mcnt);
 #endif
             }
 	  else if (mcnt == 0)
             {
 #ifdef _LIBC
-              DEBUG_PRINT2 ("  Setting two bytes from %p to no_op.\n", p+2);
+              DEBUG_PRINT2 ("  Setting two bytes from %p to no_op.\n",
+			    p + OFFSET_ADDRESS_SIZE);
 #else
-              DEBUG_PRINT2 ("  Setting two bytes from 0x%x to no_op.\n", p+2);
-#endif
-	      p[2] = (unsigned char) no_op;
-              p[3] = (unsigned char) no_op;
+              DEBUG_PRINT2 ("  Setting two bytes from 0x%x to no_op.\n",
+			    p + OFFSET_ADDRESS_SIZE);
+#endif /* _LIBC */
+
+#ifdef MBS_SUPPORT
+	      p[1] = (US_CHAR_TYPE) no_op;
+#else
+	      p[2] = (US_CHAR_TYPE) no_op;
+              p[3] = (US_CHAR_TYPE) no_op;
+#endif /* MBS_SUPPORT */
               goto on_failure;
             }
           break;
 
         case jump_n:
-          EXTRACT_NUMBER (mcnt, p + 2);
+          EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE);
           DEBUG_PRINT2 ("EXECUTING jump_n %d.\n", mcnt);
 
           /* Originally, this is how many times we CAN jump.  */
           if (mcnt)
             {
                mcnt--;
-               STORE_NUMBER (p + 2, mcnt);
+               STORE_NUMBER (p + OFFSET_ADDRESS_SIZE, mcnt);
+
 #ifdef _LIBC
-               DEBUG_PRINT3 ("  Setting %p to %d.\n", p + 2, mcnt);
+               DEBUG_PRINT3 ("  Setting %p to %d.\n", p + OFFSET_ADDRESS_SIZE,
+			     mcnt);
 #else
-               DEBUG_PRINT3 ("  Setting 0x%x to %d.\n", p + 2, mcnt);
-#endif
+               DEBUG_PRINT3 ("  Setting 0x%x to %d.\n", p + OFFSET_ADDRESS_SIZE,
+			     mcnt);
+#endif /* _LIBC */
 	       goto unconditional_jump;
             }
           /* If don't have to jump any more, skip over the rest of command.  */
 	  else
-	    p += 4;
+	    p += 2 * OFFSET_ADDRESS_SIZE;
           break;
 
 	case set_number_at:
@@ -5640,12 +7216,12 @@ re_match_2_internal (bufp, string1, size1, string2, size2, pos, regs, stop)
 
 static boolean
 group_match_null_string_p (p, end, reg_info)
-    unsigned char **p, *end;
+    US_CHAR_TYPE **p, *end;
     register_info_type *reg_info;
 {
   int mcnt;
   /* Point to after the args to the start_memory.  */
-  unsigned char *p1 = *p + 2;
+  US_CHAR_TYPE *p1 = *p + 2;
 
   while (p1 < end)
     {
@@ -5683,14 +7259,16 @@ group_match_null_string_p (p, end, reg_info)
                  with an on_failure_jump (see above) that jumps to right
                  past a jump_past_alt.  */
 
-              while ((re_opcode_t) p1[mcnt-3] == jump_past_alt)
+              while ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] ==
+		     jump_past_alt)
                 {
                   /* `mcnt' holds how many bytes long the alternative
                      is, including the ending `jump_past_alt' and
                      its number.  */
 
-                  if (!alt_match_null_string_p (p1, p1 + mcnt - 3,
-				                      reg_info))
+                  if (!alt_match_null_string_p (p1, p1 + mcnt -
+						(1 + OFFSET_ADDRESS_SIZE),
+						reg_info))
                     return false;
 
                   /* Move to right after this alternative, including the
@@ -5706,10 +7284,11 @@ group_match_null_string_p (p, end, reg_info)
 		     alternative that starts with an on_failure_jump.  */
 		  p1++;
                   EXTRACT_NUMBER_AND_INCR (mcnt, p1);
-                  if ((re_opcode_t) p1[mcnt-3] != jump_past_alt)
+                  if ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] !=
+		      jump_past_alt)
                     {
 		      /* Get to the beginning of the n-th alternative.  */
-                      p1 -= 3;
+                      p1 -= 1 + OFFSET_ADDRESS_SIZE;
                       break;
                     }
                 }
@@ -5717,7 +7296,7 @@ group_match_null_string_p (p, end, reg_info)
               /* Deal with the last alternative: go back and get number
                  of the `jump_past_alt' just before it.  `mcnt' contains
                  the length of the alternative.  */
-              EXTRACT_NUMBER (mcnt, p1 - 2);
+              EXTRACT_NUMBER (mcnt, p1 - OFFSET_ADDRESS_SIZE);
 
               if (!alt_match_null_string_p (p1, p1 + mcnt, reg_info))
                 return false;
@@ -5749,11 +7328,11 @@ group_match_null_string_p (p, end, reg_info)
 
 static boolean
 alt_match_null_string_p (p, end, reg_info)
-    unsigned char *p, *end;
+    US_CHAR_TYPE *p, *end;
     register_info_type *reg_info;
 {
   int mcnt;
-  unsigned char *p1 = p;
+  US_CHAR_TYPE *p1 = p;
 
   while (p1 < end)
     {
@@ -5786,13 +7365,13 @@ alt_match_null_string_p (p, end, reg_info)
 
 static boolean
 common_op_match_null_string_p (p, end, reg_info)
-    unsigned char **p, *end;
+    US_CHAR_TYPE **p, *end;
     register_info_type *reg_info;
 {
   int mcnt;
   boolean ret;
   int reg_no;
-  unsigned char *p1 = *p;
+  US_CHAR_TYPE *p1 = *p;
 
   switch ((re_opcode_t) *p1++)
     {
@@ -5838,12 +7417,12 @@ common_op_match_null_string_p (p, end, reg_info)
 
     case succeed_n:
       /* Get to the number of times to succeed.  */
-      p1 += 2;
+      p1 += OFFSET_ADDRESS_SIZE;
       EXTRACT_NUMBER_AND_INCR (mcnt, p1);
 
       if (mcnt == 0)
         {
-          p1 -= 4;
+          p1 -= 2 * OFFSET_ADDRESS_SIZE;
           EXTRACT_NUMBER_AND_INCR (mcnt, p1);
           p1 += mcnt;
         }
@@ -5857,7 +7436,7 @@ common_op_match_null_string_p (p, end, reg_info)
       break;
 
     case set_number_at:
-      p1 += 4;
+      p1 += 2 * OFFSET_ADDRESS_SIZE;
 
     default:
       /* All other opcodes mean we cannot match the empty string.  */
@@ -5874,15 +7453,21 @@ common_op_match_null_string_p (p, end, reg_info)
 
 static int
 bcmp_translate (s1, s2, len, translate)
-     const char *s1, *s2;
+     const CHAR_TYPE *s1, *s2;
      register int len;
      RE_TRANSLATE_TYPE translate;
 {
-  register const unsigned char *p1 = (const unsigned char *) s1;
-  register const unsigned char *p2 = (const unsigned char *) s2;
+  register const US_CHAR_TYPE *p1 = (const US_CHAR_TYPE *) s1;
+  register const US_CHAR_TYPE *p2 = (const US_CHAR_TYPE *) s2;
   while (len)
     {
+#ifdef MBS_SUPPORT
+      if (((*p1<=0xff)?translate[*p1++]:*p1++)
+	  != ((*p2<=0xff)?translate[*p2++]:*p2++))
+	return 1;
+#else
       if (translate[*p1++] != translate[*p2++]) return 1;
+#endif /* MBS_SUPPORT */
       len--;
     }
   return 0;