--- old/usr/src/lib/libparted/common/lib/regex_internal.c	2014-07-17 16:13:46.395652533 +0200
+++ /dev/null	2014-07-17 16:13:46.000000000 +0200
@@ -1,1741 +0,0 @@
-/* Extended regular expression matching and search library.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software
-   Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License along
-   with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-static void re_string_construct_common (const char *str, Idx len,
-					re_string_t *pstr,
-					RE_TRANSLATE_TYPE trans, bool icase,
-					const re_dfa_t *dfa) internal_function;
-static re_dfastate_t *create_ci_newstate (const re_dfa_t *dfa,
-					  const re_node_set *nodes,
-					  re_hashval_t hash) internal_function;
-static re_dfastate_t *create_cd_newstate (const re_dfa_t *dfa,
-					  const re_node_set *nodes,
-					  unsigned int context,
-					  re_hashval_t hash) internal_function;
-
-/* Functions for string operation.  */
-
-/* This function allocate the buffers.  It is necessary to call
-   re_string_reconstruct before using the object.  */
-
-static reg_errcode_t
-internal_function
-re_string_allocate (re_string_t *pstr, const char *str, Idx len, Idx init_len,
-		    RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
-{
-  reg_errcode_t ret;
-  Idx init_buf_len;
-
-  /* Ensure at least one character fits into the buffers.  */
-  if (init_len < dfa->mb_cur_max)
-    init_len = dfa->mb_cur_max;
-  init_buf_len = (len + 1 < init_len) ? len + 1: init_len;
-  re_string_construct_common (str, len, pstr, trans, icase, dfa);
-
-  ret = re_string_realloc_buffers (pstr, init_buf_len);
-  if (BE (ret != REG_NOERROR, 0))
-    return ret;
-
-  pstr->word_char = dfa->word_char;
-  pstr->word_ops_used = dfa->word_ops_used;
-  pstr->mbs = pstr->mbs_allocated ? pstr->mbs : (unsigned char *) str;
-  pstr->valid_len = (pstr->mbs_allocated || dfa->mb_cur_max > 1) ? 0 : len;
-  pstr->valid_raw_len = pstr->valid_len;
-  return REG_NOERROR;
-}
-
-/* This function allocate the buffers, and initialize them.  */
-
-static reg_errcode_t
-internal_function
-re_string_construct (re_string_t *pstr, const char *str, Idx len,
-		     RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
-{
-  reg_errcode_t ret;
-  memset (pstr, '\0', sizeof (re_string_t));
-  re_string_construct_common (str, len, pstr, trans, icase, dfa);
-
-  if (len > 0)
-    {
-      ret = re_string_realloc_buffers (pstr, len + 1);
-      if (BE (ret != REG_NOERROR, 0))
-	return ret;
-    }
-  pstr->mbs = pstr->mbs_allocated ? pstr->mbs : (unsigned char *) str;
-
-  if (icase)
-    {
-#ifdef RE_ENABLE_I18N
-      if (dfa->mb_cur_max > 1)
-	{
-	  while (1)
-	    {
-	      ret = build_wcs_upper_buffer (pstr);
-	      if (BE (ret != REG_NOERROR, 0))
-		return ret;
-	      if (pstr->valid_raw_len >= len)
-		break;
-	      if (pstr->bufs_len > pstr->valid_len + dfa->mb_cur_max)
-		break;
-	      ret = re_string_realloc_buffers (pstr, pstr->bufs_len * 2);
-	      if (BE (ret != REG_NOERROR, 0))
-		return ret;
-	    }
-	}
-      else
-#endif /* RE_ENABLE_I18N  */
-	build_upper_buffer (pstr);
-    }
-  else
-    {
-#ifdef RE_ENABLE_I18N
-      if (dfa->mb_cur_max > 1)
-	build_wcs_buffer (pstr);
-      else
-#endif /* RE_ENABLE_I18N  */
-	{
-	  if (trans != NULL)
-	    re_string_translate_buffer (pstr);
-	  else
-	    {
-	      pstr->valid_len = pstr->bufs_len;
-	      pstr->valid_raw_len = pstr->bufs_len;
-	    }
-	}
-    }
-
-  return REG_NOERROR;
-}
-
-/* Helper functions for re_string_allocate, and re_string_construct.  */
-
-static reg_errcode_t
-internal_function
-re_string_realloc_buffers (re_string_t *pstr, Idx new_buf_len)
-{
-#ifdef RE_ENABLE_I18N
-  if (pstr->mb_cur_max > 1)
-    {
-      wint_t *new_wcs;
-
-      /* Avoid overflow.  */
-      size_t max_object_size = MAX (sizeof (wint_t), sizeof (Idx));
-      if (BE (SIZE_MAX / max_object_size < new_buf_len, 0))
-	return REG_ESPACE;
-
-      new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
-      if (BE (new_wcs == NULL, 0))
-	return REG_ESPACE;
-      pstr->wcs = new_wcs;
-      if (pstr->offsets != NULL)
-	{
-	  Idx *new_offsets = re_realloc (pstr->offsets, Idx, new_buf_len);
-	  if (BE (new_offsets == NULL, 0))
-	    return REG_ESPACE;
-	  pstr->offsets = new_offsets;
-	}
-    }
-#endif /* RE_ENABLE_I18N  */
-  if (pstr->mbs_allocated)
-    {
-      unsigned char *new_mbs = re_realloc (pstr->mbs, unsigned char,
-					   new_buf_len);
-      if (BE (new_mbs == NULL, 0))
-	return REG_ESPACE;
-      pstr->mbs = new_mbs;
-    }
-  pstr->bufs_len = new_buf_len;
-  return REG_NOERROR;
-}
-
-
-static void
-internal_function
-re_string_construct_common (const char *str, Idx len, re_string_t *pstr,
-			    RE_TRANSLATE_TYPE trans, bool icase,
-			    const re_dfa_t *dfa)
-{
-  pstr->raw_mbs = (const unsigned char *) str;
-  pstr->len = len;
-  pstr->raw_len = len;
-  pstr->trans = trans;
-  pstr->icase = icase;
-  pstr->mbs_allocated = (trans != NULL || icase);
-  pstr->mb_cur_max = dfa->mb_cur_max;
-  pstr->is_utf8 = dfa->is_utf8;
-  pstr->map_notascii = dfa->map_notascii;
-  pstr->stop = pstr->len;
-  pstr->raw_stop = pstr->stop;
-}
-
-#ifdef RE_ENABLE_I18N
-
-/* Build wide character buffer PSTR->WCS.
-   If the byte sequence of the string are:
-     <mb1>(0), <mb1>(1), <mb2>(0), <mb2>(1), <sb3>
-   Then wide character buffer will be:
-     <wc1>   , WEOF    , <wc2>   , WEOF    , <wc3>
-   We use WEOF for padding, they indicate that the position isn't
-   a first byte of a multibyte character.
-
-   Note that this function assumes PSTR->VALID_LEN elements are already
-   built and starts from PSTR->VALID_LEN.  */
-
-static void
-internal_function
-build_wcs_buffer (re_string_t *pstr)
-{
-#ifdef _LIBC
-  unsigned char buf[MB_LEN_MAX];
-  assert (MB_LEN_MAX >= pstr->mb_cur_max);
-#else
-  unsigned char buf[64];
-#endif
-  mbstate_t prev_st;
-  Idx byte_idx, end_idx, remain_len;
-  size_t mbclen;
-
-  /* Build the buffers from pstr->valid_len to either pstr->len or
-     pstr->bufs_len.  */
-  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
-  for (byte_idx = pstr->valid_len; byte_idx < end_idx;)
-    {
-      wchar_t wc;
-      const char *p;
-
-      remain_len = end_idx - byte_idx;
-      prev_st = pstr->cur_state;
-      /* Apply the translation if we need.  */
-      if (BE (pstr->trans != NULL, 0))
-	{
-	  int i, ch;
-
-	  for (i = 0; i < pstr->mb_cur_max && i < remain_len; ++i)
-	    {
-	      ch = pstr->raw_mbs [pstr->raw_mbs_idx + byte_idx + i];
-	      buf[i] = pstr->mbs[byte_idx + i] = pstr->trans[ch];
-	    }
-	  p = (const char *) buf;
-	}
-      else
-	p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx;
-      mbclen = mbrtowc (&wc, p, remain_len, &pstr->cur_state);
-      if (BE (mbclen == (size_t) -2, 0))
-	{
-	  /* The buffer doesn't have enough space, finish to build.  */
-	  pstr->cur_state = prev_st;
-	  break;
-	}
-      else if (BE (mbclen == (size_t) -1 || mbclen == 0, 0))
-	{
-	  /* We treat these cases as a singlebyte character.  */
-	  mbclen = 1;
-	  wc = (wchar_t) pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
-	  if (BE (pstr->trans != NULL, 0))
-	    wc = pstr->trans[wc];
-	  pstr->cur_state = prev_st;
-	}
-
-      /* Write wide character and padding.  */
-      pstr->wcs[byte_idx++] = wc;
-      /* Write paddings.  */
-      for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
-	pstr->wcs[byte_idx++] = WEOF;
-    }
-  pstr->valid_len = byte_idx;
-  pstr->valid_raw_len = byte_idx;
-}
-
-/* Build wide character buffer PSTR->WCS like build_wcs_buffer,
-   but for REG_ICASE.  */
-
-static reg_errcode_t
-internal_function
-build_wcs_upper_buffer (re_string_t *pstr)
-{
-  mbstate_t prev_st;
-  Idx src_idx, byte_idx, end_idx, remain_len;
-  size_t mbclen;
-#ifdef _LIBC
-  char buf[MB_LEN_MAX];
-  assert (MB_LEN_MAX >= pstr->mb_cur_max);
-#else
-  char buf[64];
-#endif
-
-  byte_idx = pstr->valid_len;
-  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
-
-  /* The following optimization assumes that ASCII characters can be
-     mapped to wide characters with a simple cast.  */
-  if (! pstr->map_notascii && pstr->trans == NULL && !pstr->offsets_needed)
-    {
-      while (byte_idx < end_idx)
-	{
-	  wchar_t wc;
-
-	  if (isascii (pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx])
-	      && mbsinit (&pstr->cur_state))
-	    {
-	      /* In case of a singlebyte character.  */
-	      pstr->mbs[byte_idx]
-		= toupper (pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx]);
-	      /* The next step uses the assumption that wchar_t is encoded
-		 ASCII-safe: all ASCII values can be converted like this.  */
-	      pstr->wcs[byte_idx] = (wchar_t) pstr->mbs[byte_idx];
-	      ++byte_idx;
-	      continue;
-	    }
-
-	  remain_len = end_idx - byte_idx;
-	  prev_st = pstr->cur_state;
-	  mbclen = mbrtowc (&wc,
-			    ((const char *) pstr->raw_mbs + pstr->raw_mbs_idx
-			     + byte_idx), remain_len, &pstr->cur_state);
-	  if (BE (mbclen < (size_t) -2, 1))
-	    {
-	      wchar_t wcu = wc;
-	      if (iswlower (wc))
-		{
-		  size_t mbcdlen;
-
-		  wcu = towupper (wc);
-		  mbcdlen = wcrtomb (buf, wcu, &prev_st);
-		  if (BE (mbclen == mbcdlen, 1))
-		    memcpy (pstr->mbs + byte_idx, buf, mbclen);
-		  else
-		    {
-		      src_idx = byte_idx;
-		      goto offsets_needed;
-		    }
-		}
-	      else
-		memcpy (pstr->mbs + byte_idx,
-			pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx, mbclen);
-	      pstr->wcs[byte_idx++] = wcu;
-	      /* Write paddings.  */
-	      for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
-		pstr->wcs[byte_idx++] = WEOF;
-	    }
-	  else if (mbclen == (size_t) -1 || mbclen == 0)
-	    {
-	      /* It is an invalid character or '\0'.  Just use the byte.  */
-	      int ch = pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
-	      pstr->mbs[byte_idx] = ch;
-	      /* And also cast it to wide char.  */
-	      pstr->wcs[byte_idx++] = (wchar_t) ch;
-	      if (BE (mbclen == (size_t) -1, 0))
-		pstr->cur_state = prev_st;
-	    }
-	  else
-	    {
-	      /* The buffer doesn't have enough space, finish to build.  */
-	      pstr->cur_state = prev_st;
-	      break;
-	    }
-	}
-      pstr->valid_len = byte_idx;
-      pstr->valid_raw_len = byte_idx;
-      return REG_NOERROR;
-    }
-  else
-    for (src_idx = pstr->valid_raw_len; byte_idx < end_idx;)
-      {
-	wchar_t wc;
-	const char *p;
-      offsets_needed:
-	remain_len = end_idx - byte_idx;
-	prev_st = pstr->cur_state;
-	if (BE (pstr->trans != NULL, 0))
-	  {
-	    int i, ch;
-
-	    for (i = 0; i < pstr->mb_cur_max && i < remain_len; ++i)
-	      {
-		ch = pstr->raw_mbs [pstr->raw_mbs_idx + src_idx + i];
-		buf[i] = pstr->trans[ch];
-	      }
-	    p = (const char *) buf;
-	  }
-	else
-	  p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + src_idx;
-	mbclen = mbrtowc (&wc, p, remain_len, &pstr->cur_state);
-	if (BE (mbclen < (size_t) -2, 1))
-	  {
-	    wchar_t wcu = wc;
-	    if (iswlower (wc))
-	      {
-		size_t mbcdlen;
-
-		wcu = towupper (wc);
-		mbcdlen = wcrtomb ((char *) buf, wcu, &prev_st);
-		if (BE (mbclen == mbcdlen, 1))
-		  memcpy (pstr->mbs + byte_idx, buf, mbclen);
-		else if (mbcdlen != (size_t) -1)
-		  {
-		    size_t i;
-
-		    if (byte_idx + mbcdlen > pstr->bufs_len)
-		      {
-			pstr->cur_state = prev_st;
-			break;
-		      }
-
-		    if (pstr->offsets == NULL)
-		      {
-			pstr->offsets = re_malloc (Idx, pstr->bufs_len);
-
-			if (pstr->offsets == NULL)
-			  return REG_ESPACE;
-		      }
-		    if (!pstr->offsets_needed)
-		      {
-			for (i = 0; i < (size_t) byte_idx; ++i)
-			  pstr->offsets[i] = i;
-			pstr->offsets_needed = 1;
-		      }
-
-		    memcpy (pstr->mbs + byte_idx, buf, mbcdlen);
-		    pstr->wcs[byte_idx] = wcu;
-		    pstr->offsets[byte_idx] = src_idx;
-		    for (i = 1; i < mbcdlen; ++i)
-		      {
-			pstr->offsets[byte_idx + i]
-			  = src_idx + (i < mbclen ? i : mbclen - 1);
-			pstr->wcs[byte_idx + i] = WEOF;
-		      }
-		    pstr->len += mbcdlen - mbclen;
-		    if (pstr->raw_stop > src_idx)
-		      pstr->stop += mbcdlen - mbclen;
-		    end_idx = (pstr->bufs_len > pstr->len)
-			      ? pstr->len : pstr->bufs_len;
-		    byte_idx += mbcdlen;
-		    src_idx += mbclen;
-		    continue;
-		  }
-                else
-                  memcpy (pstr->mbs + byte_idx, p, mbclen);
-	      }
-	    else
-	      memcpy (pstr->mbs + byte_idx, p, mbclen);
-
-	    if (BE (pstr->offsets_needed != 0, 0))
-	      {
-		size_t i;
-		for (i = 0; i < mbclen; ++i)
-		  pstr->offsets[byte_idx + i] = src_idx + i;
-	      }
-	    src_idx += mbclen;
-
-	    pstr->wcs[byte_idx++] = wcu;
-	    /* Write paddings.  */
-	    for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
-	      pstr->wcs[byte_idx++] = WEOF;
-	  }
-	else if (mbclen == (size_t) -1 || mbclen == 0)
-	  {
-	    /* It is an invalid character or '\0'.  Just use the byte.  */
-	    int ch = pstr->raw_mbs[pstr->raw_mbs_idx + src_idx];
-
-	    if (BE (pstr->trans != NULL, 0))
-	      ch = pstr->trans [ch];
-	    pstr->mbs[byte_idx] = ch;
-
-	    if (BE (pstr->offsets_needed != 0, 0))
-	      pstr->offsets[byte_idx] = src_idx;
-	    ++src_idx;
-
-	    /* And also cast it to wide char.  */
-	    pstr->wcs[byte_idx++] = (wchar_t) ch;
-	    if (BE (mbclen == (size_t) -1, 0))
-	      pstr->cur_state = prev_st;
-	  }
-	else
-	  {
-	    /* The buffer doesn't have enough space, finish to build.  */
-	    pstr->cur_state = prev_st;
-	    break;
-	  }
-      }
-  pstr->valid_len = byte_idx;
-  pstr->valid_raw_len = src_idx;
-  return REG_NOERROR;
-}
-
-/* Skip characters until the index becomes greater than NEW_RAW_IDX.
-   Return the index.  */
-
-static Idx
-internal_function
-re_string_skip_chars (re_string_t *pstr, Idx new_raw_idx, wint_t *last_wc)
-{
-  mbstate_t prev_st;
-  Idx rawbuf_idx;
-  size_t mbclen;
-  wint_t wc = WEOF;
-
-  /* Skip the characters which are not necessary to check.  */
-  for (rawbuf_idx = pstr->raw_mbs_idx + pstr->valid_raw_len;
-       rawbuf_idx < new_raw_idx;)
-    {
-      wchar_t wc2;
-      Idx remain_len;
-      remain_len = pstr->len - rawbuf_idx;
-      prev_st = pstr->cur_state;
-      mbclen = mbrtowc (&wc2, (const char *) pstr->raw_mbs + rawbuf_idx,
-			remain_len, &pstr->cur_state);
-      if (BE (mbclen == (size_t) -2 || mbclen == (size_t) -1 || mbclen == 0, 0))
-	{
-	  /* We treat these cases as a single byte character.  */
-	  if (mbclen == 0 || remain_len == 0)
-	    wc = L'\0';
-	  else
-	    wc = *(unsigned char *) (pstr->raw_mbs + rawbuf_idx);
-	  mbclen = 1;
-	  pstr->cur_state = prev_st;
-	}
-      else
-	wc = wc2;
-      /* Then proceed the next character.  */
-      rawbuf_idx += mbclen;
-    }
-  *last_wc = wc;
-  return rawbuf_idx;
-}
-#endif /* RE_ENABLE_I18N  */
-
-/* Build the buffer PSTR->MBS, and apply the translation if we need.
-   This function is used in case of REG_ICASE.  */
-
-static void
-internal_function
-build_upper_buffer (re_string_t *pstr)
-{
-  Idx char_idx, end_idx;
-  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
-
-  for (char_idx = pstr->valid_len; char_idx < end_idx; ++char_idx)
-    {
-      int ch = pstr->raw_mbs[pstr->raw_mbs_idx + char_idx];
-      if (BE (pstr->trans != NULL, 0))
-	ch = pstr->trans[ch];
-      if (islower (ch))
-	pstr->mbs[char_idx] = toupper (ch);
-      else
-	pstr->mbs[char_idx] = ch;
-    }
-  pstr->valid_len = char_idx;
-  pstr->valid_raw_len = char_idx;
-}
-
-/* Apply TRANS to the buffer in PSTR.  */
-
-static void
-internal_function
-re_string_translate_buffer (re_string_t *pstr)
-{
-  Idx buf_idx, end_idx;
-  end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
-
-  for (buf_idx = pstr->valid_len; buf_idx < end_idx; ++buf_idx)
-    {
-      int ch = pstr->raw_mbs[pstr->raw_mbs_idx + buf_idx];
-      pstr->mbs[buf_idx] = pstr->trans[ch];
-    }
-
-  pstr->valid_len = buf_idx;
-  pstr->valid_raw_len = buf_idx;
-}
-
-/* This function re-construct the buffers.
-   Concretely, convert to wide character in case of pstr->mb_cur_max > 1,
-   convert to upper case in case of REG_ICASE, apply translation.  */
-
-static reg_errcode_t
-internal_function
-re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
-{
-  Idx offset;
-
-  if (BE (pstr->raw_mbs_idx <= idx, 0))
-    offset = idx - pstr->raw_mbs_idx;
-  else
-    {
-      /* Reset buffer.  */
-#ifdef RE_ENABLE_I18N
-      if (pstr->mb_cur_max > 1)
-	memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
-#endif /* RE_ENABLE_I18N */
-      pstr->len = pstr->raw_len;
-      pstr->stop = pstr->raw_stop;
-      pstr->valid_len = 0;
-      pstr->raw_mbs_idx = 0;
-      pstr->valid_raw_len = 0;
-      pstr->offsets_needed = 0;
-      pstr->tip_context = ((eflags & REG_NOTBOL) ? CONTEXT_BEGBUF
-			   : CONTEXT_NEWLINE | CONTEXT_BEGBUF);
-      if (!pstr->mbs_allocated)
-	pstr->mbs = (unsigned char *) pstr->raw_mbs;
-      offset = idx;
-    }
-
-  if (BE (offset != 0, 1))
-    {
-      /* Should the already checked characters be kept?  */
-      if (BE (offset < pstr->valid_raw_len, 1))
-	{
-	  /* Yes, move them to the front of the buffer.  */
-#ifdef RE_ENABLE_I18N
-	  if (BE (pstr->offsets_needed, 0))
-	    {
-	      Idx low = 0, high = pstr->valid_len, mid;
-	      do
-		{
-		  mid = (high + low) / 2;
-		  if (pstr->offsets[mid] > offset)
-		    high = mid;
-		  else if (pstr->offsets[mid] < offset)
-		    low = mid + 1;
-		  else
-		    break;
-		}
-	      while (low < high);
-	      if (pstr->offsets[mid] < offset)
-		++mid;
-	      pstr->tip_context = re_string_context_at (pstr, mid - 1,
-							eflags);
-	      /* This can be quite complicated, so handle specially
-		 only the common and easy case where the character with
-		 different length representation of lower and upper
-		 case is present at or after offset.  */
-	      if (pstr->valid_len > offset
-		  && mid == offset && pstr->offsets[mid] == offset)
-		{
-		  memmove (pstr->wcs, pstr->wcs + offset,
-			   (pstr->valid_len - offset) * sizeof (wint_t));
-		  memmove (pstr->mbs, pstr->mbs + offset, pstr->valid_len - offset);
-		  pstr->valid_len -= offset;
-		  pstr->valid_raw_len -= offset;
-		  for (low = 0; low < pstr->valid_len; low++)
-		    pstr->offsets[low] = pstr->offsets[low + offset] - offset;
-		}
-	      else
-		{
-		  /* Otherwise, just find out how long the partial multibyte
-		     character at offset is and fill it with WEOF/255.  */
-		  pstr->len = pstr->raw_len - idx + offset;
-		  pstr->stop = pstr->raw_stop - idx + offset;
-		  pstr->offsets_needed = 0;
-		  while (mid > 0 && pstr->offsets[mid - 1] == offset)
-		    --mid;
-		  while (mid < pstr->valid_len)
-		    if (pstr->wcs[mid] != WEOF)
-		      break;
-		    else
-		      ++mid;
-		  if (mid == pstr->valid_len)
-		    pstr->valid_len = 0;
-		  else
-		    {
-		      pstr->valid_len = pstr->offsets[mid] - offset;
-		      if (pstr->valid_len)
-			{
-			  for (low = 0; low < pstr->valid_len; ++low)
-			    pstr->wcs[low] = WEOF;
-			  memset (pstr->mbs, 255, pstr->valid_len);
-			}
-		    }
-		  pstr->valid_raw_len = pstr->valid_len;
-		}
-	    }
-	  else
-#endif
-	    {
-	      pstr->tip_context = re_string_context_at (pstr, offset - 1,
-							eflags);
-#ifdef RE_ENABLE_I18N
-	      if (pstr->mb_cur_max > 1)
-		memmove (pstr->wcs, pstr->wcs + offset,
-			 (pstr->valid_len - offset) * sizeof (wint_t));
-#endif /* RE_ENABLE_I18N */
-	      if (BE (pstr->mbs_allocated, 0))
-		memmove (pstr->mbs, pstr->mbs + offset,
-			 pstr->valid_len - offset);
-	      pstr->valid_len -= offset;
-	      pstr->valid_raw_len -= offset;
-#if DEBUG
-	      assert (pstr->valid_len > 0);
-#endif
-	    }
-	}
-      else
-	{
-	  /* No, skip all characters until IDX.  */
-	  Idx prev_valid_len = pstr->valid_len;
-
-#ifdef RE_ENABLE_I18N
-	  if (BE (pstr->offsets_needed, 0))
-	    {
-	      pstr->len = pstr->raw_len - idx + offset;
-	      pstr->stop = pstr->raw_stop - idx + offset;
-	      pstr->offsets_needed = 0;
-	    }
-#endif
-	  pstr->valid_len = 0;
-#ifdef RE_ENABLE_I18N
-	  if (pstr->mb_cur_max > 1)
-	    {
-	      Idx wcs_idx;
-	      wint_t wc = WEOF;
-
-	      if (pstr->is_utf8)
-		{
-		  const unsigned char *raw, *p, *end;
-
-		  /* Special case UTF-8.  Multi-byte chars start with any
-		     byte other than 0x80 - 0xbf.  */
-		  raw = pstr->raw_mbs + pstr->raw_mbs_idx;
-		  end = raw + (offset - pstr->mb_cur_max);
-		  if (end < pstr->raw_mbs)
-		    end = pstr->raw_mbs;
-		  p = raw + offset - 1;
-#ifdef _LIBC
-		  /* We know the wchar_t encoding is UCS4, so for the simple
-		     case, ASCII characters, skip the conversion step.  */
-		  if (isascii (*p) && BE (pstr->trans == NULL, 1))
-		    {
-		      memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
-		      /* pstr->valid_len = 0; */
-		      wc = (wchar_t) *p;
-		    }
-		  else
-#endif
-		    for (; p >= end; --p)
-		      if ((*p & 0xc0) != 0x80)
-			{
-			  mbstate_t cur_state;
-			  wchar_t wc2;
-			  Idx mlen = raw + pstr->len - p;
-			  unsigned char buf[6];
-			  size_t mbclen;
-
-			  if (BE (pstr->trans != NULL, 0))
-			    {
-			      int i = mlen < 6 ? mlen : 6;
-			      while (--i >= 0)
-				buf[i] = pstr->trans[p[i]];
-			    }
-			  /* XXX Don't use mbrtowc, we know which conversion
-			     to use (UTF-8 -> UCS4).  */
-			  memset (&cur_state, 0, sizeof (cur_state));
-			  mbclen = mbrtowc (&wc2, (const char *) p, mlen,
-					    &cur_state);
-			  if (raw + offset - p <= mbclen
-			      && mbclen < (size_t) -2)
-			    {
-			      memset (&pstr->cur_state, '\0',
-				      sizeof (mbstate_t));
-			      pstr->valid_len = mbclen - (raw + offset - p);
-			      wc = wc2;
-			    }
-			  break;
-			}
-		}
-
-	      if (wc == WEOF)
-		pstr->valid_len = re_string_skip_chars (pstr, idx, &wc) - idx;
-	      if (wc == WEOF)
-		pstr->tip_context
-		  = re_string_context_at (pstr, prev_valid_len - 1, eflags);
-	      else
-		pstr->tip_context = ((BE (pstr->word_ops_used != 0, 0)
-				      && IS_WIDE_WORD_CHAR (wc))
-				     ? CONTEXT_WORD
-				     : ((IS_WIDE_NEWLINE (wc)
-					 && pstr->newline_anchor)
-					? CONTEXT_NEWLINE : 0));
-	      if (BE (pstr->valid_len, 0))
-		{
-		  for (wcs_idx = 0; wcs_idx < pstr->valid_len; ++wcs_idx)
-		    pstr->wcs[wcs_idx] = WEOF;
-		  if (pstr->mbs_allocated)
-		    memset (pstr->mbs, 255, pstr->valid_len);
-		}
-	      pstr->valid_raw_len = pstr->valid_len;
-	    }
-	  else
-#endif /* RE_ENABLE_I18N */
-	    {
-	      int c = pstr->raw_mbs[pstr->raw_mbs_idx + offset - 1];
-	      pstr->valid_raw_len = 0;
-	      if (pstr->trans)
-		c = pstr->trans[c];
-	      pstr->tip_context = (bitset_contain (pstr->word_char, c)
-				   ? CONTEXT_WORD
-				   : ((IS_NEWLINE (c) && pstr->newline_anchor)
-				      ? CONTEXT_NEWLINE : 0));
-	    }
-	}
-      if (!BE (pstr->mbs_allocated, 0))
-	pstr->mbs += offset;
-    }
-  pstr->raw_mbs_idx = idx;
-  pstr->len -= offset;
-  pstr->stop -= offset;
-
-  /* Then build the buffers.  */
-#ifdef RE_ENABLE_I18N
-  if (pstr->mb_cur_max > 1)
-    {
-      if (pstr->icase)
-	{
-	  reg_errcode_t ret = build_wcs_upper_buffer (pstr);
-	  if (BE (ret != REG_NOERROR, 0))
-	    return ret;
-	}
-      else
-	build_wcs_buffer (pstr);
-    }
-  else
-#endif /* RE_ENABLE_I18N */
-    if (BE (pstr->mbs_allocated, 0))
-      {
-	if (pstr->icase)
-	  build_upper_buffer (pstr);
-	else if (pstr->trans != NULL)
-	  re_string_translate_buffer (pstr);
-      }
-    else
-      pstr->valid_len = pstr->len;
-
-  pstr->cur_idx = 0;
-  return REG_NOERROR;
-}
-
-static unsigned char
-internal_function __attribute ((pure))
-re_string_peek_byte_case (const re_string_t *pstr, Idx idx)
-{
-  int ch;
-  Idx off;
-
-  /* Handle the common (easiest) cases first.  */
-  if (BE (!pstr->mbs_allocated, 1))
-    return re_string_peek_byte (pstr, idx);
-
-#ifdef RE_ENABLE_I18N
-  if (pstr->mb_cur_max > 1
-      && ! re_string_is_single_byte_char (pstr, pstr->cur_idx + idx))
-    return re_string_peek_byte (pstr, idx);
-#endif
-
-  off = pstr->cur_idx + idx;
-#ifdef RE_ENABLE_I18N
-  if (pstr->offsets_needed)
-    off = pstr->offsets[off];
-#endif
-
-  ch = pstr->raw_mbs[pstr->raw_mbs_idx + off];
-
-#ifdef RE_ENABLE_I18N
-  /* Ensure that e.g. for tr_TR.UTF-8 BACKSLASH DOTLESS SMALL LETTER I
-     this function returns CAPITAL LETTER I instead of first byte of
-     DOTLESS SMALL LETTER I.  The latter would confuse the parser,
-     since peek_byte_case doesn't advance cur_idx in any way.  */
-  if (pstr->offsets_needed && !isascii (ch))
-    return re_string_peek_byte (pstr, idx);
-#endif
-
-  return ch;
-}
-
-static unsigned char
-internal_function __attribute ((pure))
-re_string_fetch_byte_case (re_string_t *pstr)
-{
-  if (BE (!pstr->mbs_allocated, 1))
-    return re_string_fetch_byte (pstr);
-
-#ifdef RE_ENABLE_I18N
-  if (pstr->offsets_needed)
-    {
-      Idx off;
-      int ch;
-
-      /* For tr_TR.UTF-8 [[:islower:]] there is
-	 [[: CAPITAL LETTER I WITH DOT lower:]] in mbs.  Skip
-	 in that case the whole multi-byte character and return
-	 the original letter.  On the other side, with
-	 [[: DOTLESS SMALL LETTER I return [[:I, as doing
-	 anything else would complicate things too much.  */
-
-      if (!re_string_first_byte (pstr, pstr->cur_idx))
-	return re_string_fetch_byte (pstr);
-
-      off = pstr->offsets[pstr->cur_idx];
-      ch = pstr->raw_mbs[pstr->raw_mbs_idx + off];
-
-      if (! isascii (ch))
-	return re_string_fetch_byte (pstr);
-
-      re_string_skip_bytes (pstr,
-			    re_string_char_size_at (pstr, pstr->cur_idx));
-      return ch;
-    }
-#endif
-
-  return pstr->raw_mbs[pstr->raw_mbs_idx + pstr->cur_idx++];
-}
-
-static void
-internal_function
-re_string_destruct (re_string_t *pstr)
-{
-#ifdef RE_ENABLE_I18N
-  re_free (pstr->wcs);
-  re_free (pstr->offsets);
-#endif /* RE_ENABLE_I18N  */
-  if (pstr->mbs_allocated)
-    re_free (pstr->mbs);
-}
-
-/* Return the context at IDX in INPUT.  */
-
-static unsigned int
-internal_function
-re_string_context_at (const re_string_t *input, Idx idx, int eflags)
-{
-  int c;
-  if (BE (! REG_VALID_INDEX (idx), 0))
-    /* In this case, we use the value stored in input->tip_context,
-       since we can't know the character in input->mbs[-1] here.  */
-    return input->tip_context;
-  if (BE (idx == input->len, 0))
-    return ((eflags & REG_NOTEOL) ? CONTEXT_ENDBUF
-	    : CONTEXT_NEWLINE | CONTEXT_ENDBUF);
-#ifdef RE_ENABLE_I18N
-  if (input->mb_cur_max > 1)
-    {
-      wint_t wc;
-      Idx wc_idx = idx;
-      while(input->wcs[wc_idx] == WEOF)
-	{
-#ifdef DEBUG
-	  /* It must not happen.  */
-	  assert (REG_VALID_INDEX (wc_idx));
-#endif
-	  --wc_idx;
-	  if (! REG_VALID_INDEX (wc_idx))
-	    return input->tip_context;
-	}
-      wc = input->wcs[wc_idx];
-      if (BE (input->word_ops_used != 0, 0) && IS_WIDE_WORD_CHAR (wc))
-	return CONTEXT_WORD;
-      return (IS_WIDE_NEWLINE (wc) && input->newline_anchor
-	      ? CONTEXT_NEWLINE : 0);
-    }
-  else
-#endif
-    {
-      c = re_string_byte_at (input, idx);
-      if (bitset_contain (input->word_char, c))
-	return CONTEXT_WORD;
-      return IS_NEWLINE (c) && input->newline_anchor ? CONTEXT_NEWLINE : 0;
-    }
-}
-
-/* Functions for set operation.  */
-
-static reg_errcode_t
-internal_function
-re_node_set_alloc (re_node_set *set, Idx size)
-{
-  set->alloc = size;
-  set->nelem = 0;
-  set->elems = re_malloc (Idx, size);
-  if (BE (set->elems == NULL, 0))
-    return REG_ESPACE;
-  return REG_NOERROR;
-}
-
-static reg_errcode_t
-internal_function
-re_node_set_init_1 (re_node_set *set, Idx elem)
-{
-  set->alloc = 1;
-  set->nelem = 1;
-  set->elems = re_malloc (Idx, 1);
-  if (BE (set->elems == NULL, 0))
-    {
-      set->alloc = set->nelem = 0;
-      return REG_ESPACE;
-    }
-  set->elems[0] = elem;
-  return REG_NOERROR;
-}
-
-static reg_errcode_t
-internal_function
-re_node_set_init_2 (re_node_set *set, Idx elem1, Idx elem2)
-{
-  set->alloc = 2;
-  set->elems = re_malloc (Idx, 2);
-  if (BE (set->elems == NULL, 0))
-    return REG_ESPACE;
-  if (elem1 == elem2)
-    {
-      set->nelem = 1;
-      set->elems[0] = elem1;
-    }
-  else
-    {
-      set->nelem = 2;
-      if (elem1 < elem2)
-	{
-	  set->elems[0] = elem1;
-	  set->elems[1] = elem2;
-	}
-      else
-	{
-	  set->elems[0] = elem2;
-	  set->elems[1] = elem1;
-	}
-    }
-  return REG_NOERROR;
-}
-
-static reg_errcode_t
-internal_function
-re_node_set_init_copy (re_node_set *dest, const re_node_set *src)
-{
-  dest->nelem = src->nelem;
-  if (src->nelem > 0)
-    {
-      dest->alloc = dest->nelem;
-      dest->elems = re_malloc (Idx, dest->alloc);
-      if (BE (dest->elems == NULL, 0))
-	{
-	  dest->alloc = dest->nelem = 0;
-	  return REG_ESPACE;
-	}
-      memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
-    }
-  else
-    re_node_set_init_empty (dest);
-  return REG_NOERROR;
-}
-
-/* Calculate the intersection of the sets SRC1 and SRC2. And merge it to
-   DEST. Return value indicate the error code or REG_NOERROR if succeeded.
-   Note: We assume dest->elems is NULL, when dest->alloc is 0.  */
-
-static reg_errcode_t
-internal_function
-re_node_set_add_intersect (re_node_set *dest, const re_node_set *src1,
-			   const re_node_set *src2)
-{
-  Idx i1, i2, is, id, delta, sbase;
-  if (src1->nelem == 0 || src2->nelem == 0)
-    return REG_NOERROR;
-
-  /* We need dest->nelem + 2 * elems_in_intersection; this is a
-     conservative estimate.  */
-  if (src1->nelem + src2->nelem + dest->nelem > dest->alloc)
-    {
-      Idx new_alloc = src1->nelem + src2->nelem + dest->alloc;
-      Idx *new_elems = re_realloc (dest->elems, Idx, new_alloc);
-      if (BE (new_elems == NULL, 0))
-        return REG_ESPACE;
-      dest->elems = new_elems;
-      dest->alloc = new_alloc;
-    }
-
-  /* Find the items in the intersection of SRC1 and SRC2, and copy
-     into the top of DEST those that are not already in DEST itself.  */
-  sbase = dest->nelem + src1->nelem + src2->nelem;
-  i1 = src1->nelem - 1;
-  i2 = src2->nelem - 1;
-  id = dest->nelem - 1;
-  for (;;)
-    {
-      if (src1->elems[i1] == src2->elems[i2])
-	{
-	  /* Try to find the item in DEST.  Maybe we could binary search?  */
-	  while (REG_VALID_INDEX (id) && dest->elems[id] > src1->elems[i1])
-	    --id;
-
-          if (! REG_VALID_INDEX (id) || dest->elems[id] != src1->elems[i1])
-            dest->elems[--sbase] = src1->elems[i1];
-
-	  if (! REG_VALID_INDEX (--i1) || ! REG_VALID_INDEX (--i2))
-	    break;
-	}
-
-      /* Lower the highest of the two items.  */
-      else if (src1->elems[i1] < src2->elems[i2])
-	{
-	  if (! REG_VALID_INDEX (--i2))
-	    break;
-	}
-      else
-	{
-	  if (! REG_VALID_INDEX (--i1))
-	    break;
-	}
-    }
-
-  id = dest->nelem - 1;
-  is = dest->nelem + src1->nelem + src2->nelem - 1;
-  delta = is - sbase + 1;
-
-  /* Now copy.  When DELTA becomes zero, the remaining
-     DEST elements are already in place; this is more or
-     less the same loop that is in re_node_set_merge.  */
-  dest->nelem += delta;
-  if (delta > 0 && REG_VALID_INDEX (id))
-    for (;;)
-      {
-        if (dest->elems[is] > dest->elems[id])
-          {
-            /* Copy from the top.  */
-            dest->elems[id + delta--] = dest->elems[is--];
-            if (delta == 0)
-              break;
-          }
-        else
-          {
-            /* Slide from the bottom.  */
-            dest->elems[id + delta] = dest->elems[id];
-            if (! REG_VALID_INDEX (--id))
-              break;
-          }
-      }
-
-  /* Copy remaining SRC elements.  */
-  memcpy (dest->elems, dest->elems + sbase, delta * sizeof (Idx));
-
-  return REG_NOERROR;
-}
-
-/* Calculate the union set of the sets SRC1 and SRC2. And store it to
-   DEST. Return value indicate the error code or REG_NOERROR if succeeded.  */
-
-static reg_errcode_t
-internal_function
-re_node_set_init_union (re_node_set *dest, const re_node_set *src1,
-			const re_node_set *src2)
-{
-  Idx i1, i2, id;
-  if (src1 != NULL && src1->nelem > 0 && src2 != NULL && src2->nelem > 0)
-    {
-      dest->alloc = src1->nelem + src2->nelem;
-      dest->elems = re_malloc (Idx, dest->alloc);
-      if (BE (dest->elems == NULL, 0))
-	return REG_ESPACE;
-    }
-  else
-    {
-      if (src1 != NULL && src1->nelem > 0)
-	return re_node_set_init_copy (dest, src1);
-      else if (src2 != NULL && src2->nelem > 0)
-	return re_node_set_init_copy (dest, src2);
-      else
-	re_node_set_init_empty (dest);
-      return REG_NOERROR;
-    }
-  for (i1 = i2 = id = 0 ; i1 < src1->nelem && i2 < src2->nelem ;)
-    {
-      if (src1->elems[i1] > src2->elems[i2])
-	{
-	  dest->elems[id++] = src2->elems[i2++];
-	  continue;
-	}
-      if (src1->elems[i1] == src2->elems[i2])
-	++i2;
-      dest->elems[id++] = src1->elems[i1++];
-    }
-  if (i1 < src1->nelem)
-    {
-      memcpy (dest->elems + id, src1->elems + i1,
-	     (src1->nelem - i1) * sizeof (Idx));
-      id += src1->nelem - i1;
-    }
-  else if (i2 < src2->nelem)
-    {
-      memcpy (dest->elems + id, src2->elems + i2,
-	     (src2->nelem - i2) * sizeof (Idx));
-      id += src2->nelem - i2;
-    }
-  dest->nelem = id;
-  return REG_NOERROR;
-}
-
-/* Calculate the union set of the sets DEST and SRC. And store it to
-   DEST. Return value indicate the error code or REG_NOERROR if succeeded.  */
-
-static reg_errcode_t
-internal_function
-re_node_set_merge (re_node_set *dest, const re_node_set *src)
-{
-  Idx is, id, sbase, delta;
-  if (src == NULL || src->nelem == 0)
-    return REG_NOERROR;
-  if (dest->alloc < 2 * src->nelem + dest->nelem)
-    {
-      Idx new_alloc = 2 * (src->nelem + dest->alloc);
-      Idx *new_buffer = re_realloc (dest->elems, Idx, new_alloc);
-      if (BE (new_buffer == NULL, 0))
-	return REG_ESPACE;
-      dest->elems = new_buffer;
-      dest->alloc = new_alloc;
-    }
-
-  if (BE (dest->nelem == 0, 0))
-    {
-      dest->nelem = src->nelem;
-      memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
-      return REG_NOERROR;
-    }
-
-  /* Copy into the top of DEST the items of SRC that are not
-     found in DEST.  Maybe we could binary search in DEST?  */
-  for (sbase = dest->nelem + 2 * src->nelem,
-       is = src->nelem - 1, id = dest->nelem - 1;
-       REG_VALID_INDEX (is) && REG_VALID_INDEX (id); )
-    {
-      if (dest->elems[id] == src->elems[is])
-        is--, id--;
-      else if (dest->elems[id] < src->elems[is])
-        dest->elems[--sbase] = src->elems[is--];
-      else /* if (dest->elems[id] > src->elems[is]) */
-        --id;
-    }
-
-  if (REG_VALID_INDEX (is))
-    {
-      /* If DEST is exhausted, the remaining items of SRC must be unique.  */
-      sbase -= is + 1;
-      memcpy (dest->elems + sbase, src->elems, (is + 1) * sizeof (Idx));
-    }
-
-  id = dest->nelem - 1;
-  is = dest->nelem + 2 * src->nelem - 1;
-  delta = is - sbase + 1;
-  if (delta == 0)
-    return REG_NOERROR;
-
-  /* Now copy.  When DELTA becomes zero, the remaining
-     DEST elements are already in place.  */
-  dest->nelem += delta;
-  for (;;)
-    {
-      if (dest->elems[is] > dest->elems[id])
-        {
-	  /* Copy from the top.  */
-          dest->elems[id + delta--] = dest->elems[is--];
-	  if (delta == 0)
-	    break;
-	}
-      else
-        {
-          /* Slide from the bottom.  */
-          dest->elems[id + delta] = dest->elems[id];
-	  if (! REG_VALID_INDEX (--id))
-	    {
-	      /* Copy remaining SRC elements.  */
-	      memcpy (dest->elems, dest->elems + sbase,
-	              delta * sizeof (Idx));
-	      break;
-	    }
-	}
-    }
-
-  return REG_NOERROR;
-}
-
-/* Insert the new element ELEM to the re_node_set* SET.
-   SET should not already have ELEM.
-   Return true if successful.  */
-
-static bool
-internal_function
-re_node_set_insert (re_node_set *set, Idx elem)
-{
-  Idx idx;
-  /* In case the set is empty.  */
-  if (set->alloc == 0)
-    return BE (re_node_set_init_1 (set, elem) == REG_NOERROR, 1);
-
-  if (BE (set->nelem, 0) == 0)
-    {
-      /* We already guaranteed above that set->alloc != 0.  */
-      set->elems[0] = elem;
-      ++set->nelem;
-      return true;
-    }
-
-  /* Realloc if we need.  */
-  if (set->alloc == set->nelem)
-    {
-      Idx *new_elems;
-      set->alloc = set->alloc * 2;
-      new_elems = re_realloc (set->elems, Idx, set->alloc);
-      if (BE (new_elems == NULL, 0))
-	return false;
-      set->elems = new_elems;
-    }
-
-  /* Move the elements which follows the new element.  Test the
-     first element separately to skip a check in the inner loop.  */
-  if (elem < set->elems[0])
-    {
-      idx = 0;
-      for (idx = set->nelem; idx > 0; idx--)
-        set->elems[idx] = set->elems[idx - 1];
-    }
-  else
-    {
-      for (idx = set->nelem; set->elems[idx - 1] > elem; idx--)
-        set->elems[idx] = set->elems[idx - 1];
-    }
-
-  /* Insert the new element.  */
-  set->elems[idx] = elem;
-  ++set->nelem;
-  return true;
-}
-
-/* Insert the new element ELEM to the re_node_set* SET.
-   SET should not already have any element greater than or equal to ELEM.
-   Return true if successful.  */
-
-static bool
-internal_function
-re_node_set_insert_last (re_node_set *set, Idx elem)
-{
-  /* Realloc if we need.  */
-  if (set->alloc == set->nelem)
-    {
-      Idx *new_elems;
-      set->alloc = (set->alloc + 1) * 2;
-      new_elems = re_realloc (set->elems, Idx, set->alloc);
-      if (BE (new_elems == NULL, 0))
-	return false;
-      set->elems = new_elems;
-    }
-
-  /* Insert the new element.  */
-  set->elems[set->nelem++] = elem;
-  return true;
-}
-
-/* Compare two node sets SET1 and SET2.
-   Return true if SET1 and SET2 are equivalent.  */
-
-static bool
-internal_function __attribute ((pure))
-re_node_set_compare (const re_node_set *set1, const re_node_set *set2)
-{
-  Idx i;
-  if (set1 == NULL || set2 == NULL || set1->nelem != set2->nelem)
-    return false;
-  for (i = set1->nelem ; REG_VALID_INDEX (--i) ; )
-    if (set1->elems[i] != set2->elems[i])
-      return false;
-  return true;
-}
-
-/* Return (idx + 1) if SET contains the element ELEM, return 0 otherwise.  */
-
-static Idx
-internal_function __attribute ((pure))
-re_node_set_contains (const re_node_set *set, Idx elem)
-{
-  __re_size_t idx, right, mid;
-  if (! REG_VALID_NONZERO_INDEX (set->nelem))
-    return 0;
-
-  /* Binary search the element.  */
-  idx = 0;
-  right = set->nelem - 1;
-  while (idx < right)
-    {
-      mid = (idx + right) / 2;
-      if (set->elems[mid] < elem)
-	idx = mid + 1;
-      else
-	right = mid;
-    }
-  return set->elems[idx] == elem ? idx + 1 : 0;
-}
-
-static void
-internal_function
-re_node_set_remove_at (re_node_set *set, Idx idx)
-{
-  if (idx < 0 || idx >= set->nelem)
-    return;
-  --set->nelem;
-  for (; idx < set->nelem; idx++)
-    set->elems[idx] = set->elems[idx + 1];
-}
-
-
-/* Add the token TOKEN to dfa->nodes, and return the index of the token.
-   Or return REG_MISSING if an error occurred.  */
-
-static Idx
-internal_function
-re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
-{
-  if (BE (dfa->nodes_len >= dfa->nodes_alloc, 0))
-    {
-      size_t new_nodes_alloc = dfa->nodes_alloc * 2;
-      Idx *new_nexts, *new_indices;
-      re_node_set *new_edests, *new_eclosures;
-      re_token_t *new_nodes;
-      size_t max_object_size =
-	MAX (sizeof (re_token_t),
-	     MAX (sizeof (re_node_set),
-		  sizeof (Idx)));
-
-      /* Avoid overflows.  */
-      if (BE (SIZE_MAX / 2 / max_object_size < dfa->nodes_alloc, 0))
-	return REG_MISSING;
-
-      new_nodes = re_realloc (dfa->nodes, re_token_t, new_nodes_alloc);
-      if (BE (new_nodes == NULL, 0))
-	return REG_MISSING;
-      dfa->nodes = new_nodes;
-      new_nexts = re_realloc (dfa->nexts, Idx, new_nodes_alloc);
-      new_indices = re_realloc (dfa->org_indices, Idx, new_nodes_alloc);
-      new_edests = re_realloc (dfa->edests, re_node_set, new_nodes_alloc);
-      new_eclosures = re_realloc (dfa->eclosures, re_node_set, new_nodes_alloc);
-      if (BE (new_nexts == NULL || new_indices == NULL
-	      || new_edests == NULL || new_eclosures == NULL, 0))
-	return REG_MISSING;
-      dfa->nexts = new_nexts;
-      dfa->org_indices = new_indices;
-      dfa->edests = new_edests;
-      dfa->eclosures = new_eclosures;
-      dfa->nodes_alloc = new_nodes_alloc;
-    }
-  dfa->nodes[dfa->nodes_len] = token;
-  dfa->nodes[dfa->nodes_len].constraint = 0;
-#ifdef RE_ENABLE_I18N
-  {
-  int type = token.type;
-  dfa->nodes[dfa->nodes_len].accept_mb =
-    (type == OP_PERIOD && dfa->mb_cur_max > 1) || type == COMPLEX_BRACKET;
-  }
-#endif
-  dfa->nexts[dfa->nodes_len] = REG_MISSING;
-  re_node_set_init_empty (dfa->edests + dfa->nodes_len);
-  re_node_set_init_empty (dfa->eclosures + dfa->nodes_len);
-  return dfa->nodes_len++;
-}
-
-static inline re_hashval_t
-internal_function
-calc_state_hash (const re_node_set *nodes, unsigned int context)
-{
-  re_hashval_t hash = nodes->nelem + context;
-  Idx i;
-  for (i = 0 ; i < nodes->nelem ; i++)
-    hash += nodes->elems[i];
-  return hash;
-}
-
-/* Search for the state whose node_set is equivalent to NODES.
-   Return the pointer to the state, if we found it in the DFA.
-   Otherwise create the new one and return it.  In case of an error
-   return NULL and set the error code in ERR.
-   Note: - We assume NULL as the invalid state, then it is possible that
-	   return value is NULL and ERR is REG_NOERROR.
-	 - We never return non-NULL value in case of any errors, it is for
-	   optimization.  */
-
-static re_dfastate_t *
-internal_function
-re_acquire_state (reg_errcode_t *err, const re_dfa_t *dfa,
-		  const re_node_set *nodes)
-{
-  re_hashval_t hash;
-  re_dfastate_t *new_state;
-  struct re_state_table_entry *spot;
-  Idx i;
-#ifdef lint
-  /* Suppress bogus uninitialized-variable warnings.  */
-  *err = REG_NOERROR;
-#endif
-  if (BE (nodes->nelem == 0, 0))
-    {
-      *err = REG_NOERROR;
-      return NULL;
-    }
-  hash = calc_state_hash (nodes, 0);
-  spot = dfa->state_table + (hash & dfa->state_hash_mask);
-
-  for (i = 0 ; i < spot->num ; i++)
-    {
-      re_dfastate_t *state = spot->array[i];
-      if (hash != state->hash)
-	continue;
-      if (re_node_set_compare (&state->nodes, nodes))
-	return state;
-    }
-
-  /* There are no appropriate state in the dfa, create the new one.  */
-  new_state = create_ci_newstate (dfa, nodes, hash);
-  if (BE (new_state == NULL, 0))
-    *err = REG_ESPACE;
-
-  return new_state;
-}
-
-/* Search for the state whose node_set is equivalent to NODES and
-   whose context is equivalent to CONTEXT.
-   Return the pointer to the state, if we found it in the DFA.
-   Otherwise create the new one and return it.  In case of an error
-   return NULL and set the error code in ERR.
-   Note: - We assume NULL as the invalid state, then it is possible that
-	   return value is NULL and ERR is REG_NOERROR.
-	 - We never return non-NULL value in case of any errors, it is for
-	   optimization.  */
-
-static re_dfastate_t *
-internal_function
-re_acquire_state_context (reg_errcode_t *err, const re_dfa_t *dfa,
-			  const re_node_set *nodes, unsigned int context)
-{
-  re_hashval_t hash;
-  re_dfastate_t *new_state;
-  struct re_state_table_entry *spot;
-  Idx i;
-#ifdef lint
-  /* Suppress bogus uninitialized-variable warnings.  */
-  *err = REG_NOERROR;
-#endif
-  if (nodes->nelem == 0)
-    {
-      *err = REG_NOERROR;
-      return NULL;
-    }
-  hash = calc_state_hash (nodes, context);
-  spot = dfa->state_table + (hash & dfa->state_hash_mask);
-
-  for (i = 0 ; i < spot->num ; i++)
-    {
-      re_dfastate_t *state = spot->array[i];
-      if (state->hash == hash
-	  && state->context == context
-	  && re_node_set_compare (state->entrance_nodes, nodes))
-	return state;
-    }
-  /* There are no appropriate state in `dfa', create the new one.  */
-  new_state = create_cd_newstate (dfa, nodes, context, hash);
-  if (BE (new_state == NULL, 0))
-    *err = REG_ESPACE;
-
-  return new_state;
-}
-
-/* Finish initialization of the new state NEWSTATE, and using its hash value
-   HASH put in the appropriate bucket of DFA's state table.  Return value
-   indicates the error code if failed.  */
-
-static reg_errcode_t
-register_state (const re_dfa_t *dfa, re_dfastate_t *newstate,
-		re_hashval_t hash)
-{
-  struct re_state_table_entry *spot;
-  reg_errcode_t err;
-  Idx i;
-
-  newstate->hash = hash;
-  err = re_node_set_alloc (&newstate->non_eps_nodes, newstate->nodes.nelem);
-  if (BE (err != REG_NOERROR, 0))
-    return REG_ESPACE;
-  for (i = 0; i < newstate->nodes.nelem; i++)
-    {
-      Idx elem = newstate->nodes.elems[i];
-      if (!IS_EPSILON_NODE (dfa->nodes[elem].type))
-	if (BE (! re_node_set_insert_last (&newstate->non_eps_nodes, elem), 0))
-	  return REG_ESPACE;
-    }
-
-  spot = dfa->state_table + (hash & dfa->state_hash_mask);
-  if (BE (spot->alloc <= spot->num, 0))
-    {
-      Idx new_alloc = 2 * spot->num + 2;
-      re_dfastate_t **new_array = re_realloc (spot->array, re_dfastate_t *,
-					      new_alloc);
-      if (BE (new_array == NULL, 0))
-	return REG_ESPACE;
-      spot->array = new_array;
-      spot->alloc = new_alloc;
-    }
-  spot->array[spot->num++] = newstate;
-  return REG_NOERROR;
-}
-
-static void
-free_state (re_dfastate_t *state)
-{
-  re_node_set_free (&state->non_eps_nodes);
-  re_node_set_free (&state->inveclosure);
-  if (state->entrance_nodes != &state->nodes)
-    {
-      re_node_set_free (state->entrance_nodes);
-      re_free (state->entrance_nodes);
-    }
-  re_node_set_free (&state->nodes);
-  re_free (state->word_trtable);
-  re_free (state->trtable);
-  re_free (state);
-}
-
-/* Create the new state which is independ of contexts.
-   Return the new state if succeeded, otherwise return NULL.  */
-
-static re_dfastate_t *
-internal_function
-create_ci_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
-		    re_hashval_t hash)
-{
-  Idx i;
-  reg_errcode_t err;
-  re_dfastate_t *newstate;
-
-  newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
-  if (BE (newstate == NULL, 0))
-    return NULL;
-  err = re_node_set_init_copy (&newstate->nodes, nodes);
-  if (BE (err != REG_NOERROR, 0))
-    {
-      re_free (newstate);
-      return NULL;
-    }
-
-  newstate->entrance_nodes = &newstate->nodes;
-  for (i = 0 ; i < nodes->nelem ; i++)
-    {
-      re_token_t *node = dfa->nodes + nodes->elems[i];
-      re_token_type_t type = node->type;
-      if (type == CHARACTER && !node->constraint)
-	continue;
-#ifdef RE_ENABLE_I18N
-      newstate->accept_mb |= node->accept_mb;
-#endif /* RE_ENABLE_I18N */
-
-      /* If the state has the halt node, the state is a halt state.  */
-      if (type == END_OF_RE)
-	newstate->halt = 1;
-      else if (type == OP_BACK_REF)
-	newstate->has_backref = 1;
-      else if (type == ANCHOR || node->constraint)
-	newstate->has_constraint = 1;
-    }
-  err = register_state (dfa, newstate, hash);
-  if (BE (err != REG_NOERROR, 0))
-    {
-      free_state (newstate);
-      newstate = NULL;
-    }
-  return newstate;
-}
-
-/* Create the new state which is depend on the context CONTEXT.
-   Return the new state if succeeded, otherwise return NULL.  */
-
-static re_dfastate_t *
-internal_function
-create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
-		    unsigned int context, re_hashval_t hash)
-{
-  Idx i, nctx_nodes = 0;
-  reg_errcode_t err;
-  re_dfastate_t *newstate;
-
-  newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
-  if (BE (newstate == NULL, 0))
-    return NULL;
-  err = re_node_set_init_copy (&newstate->nodes, nodes);
-  if (BE (err != REG_NOERROR, 0))
-    {
-      re_free (newstate);
-      return NULL;
-    }
-
-  newstate->context = context;
-  newstate->entrance_nodes = &newstate->nodes;
-
-  for (i = 0 ; i < nodes->nelem ; i++)
-    {
-      unsigned int constraint = 0;
-      re_token_t *node = dfa->nodes + nodes->elems[i];
-      re_token_type_t type = node->type;
-      if (node->constraint)
-	constraint = node->constraint;
-
-      if (type == CHARACTER && !constraint)
-	continue;
-#ifdef RE_ENABLE_I18N
-      newstate->accept_mb |= node->accept_mb;
-#endif /* RE_ENABLE_I18N */
-
-      /* If the state has the halt node, the state is a halt state.  */
-      if (type == END_OF_RE)
-	newstate->halt = 1;
-      else if (type == OP_BACK_REF)
-	newstate->has_backref = 1;
-      else if (type == ANCHOR)
-	constraint = node->opr.ctx_type;
-
-      if (constraint)
-	{
-	  if (newstate->entrance_nodes == &newstate->nodes)
-	    {
-	      newstate->entrance_nodes = re_malloc (re_node_set, 1);
-	      if (BE (newstate->entrance_nodes == NULL, 0))
-		{
-		  free_state (newstate);
-		  return NULL;
-		}
-	      re_node_set_init_copy (newstate->entrance_nodes, nodes);
-	      nctx_nodes = 0;
-	      newstate->has_constraint = 1;
-	    }
-
-	  if (NOT_SATISFY_PREV_CONSTRAINT (constraint,context))
-	    {
-	      re_node_set_remove_at (&newstate->nodes, i - nctx_nodes);
-	      ++nctx_nodes;
-	    }
-	}
-    }
-  err = register_state (dfa, newstate, hash);
-  if (BE (err != REG_NOERROR, 0))
-    {
-      free_state (newstate);
-      newstate = NULL;
-    }
-  return  newstate;
-}
