Sync with the latest Gnulib code (177f525)

Signed-off-by: Thomas Guyot-Sionnest <dermoth@aei.ca>

1 files changed, 85 insertions, 76 deletions

diff --git a/gl/regexec.c b/gl/regexec.c
index 5452ef7..dc449ce 100644
--- a/gl/regexec.c
+++ b/gl/regexec.c
@@ -1,6 +1,6 @@
 /* Extended regular expression matching and search library.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-   Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free
+   Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
 
@@ -637,7 +637,7 @@ re_exec (s)
    (0 <= LAST_START && LAST_START <= LENGTH)  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 re_search_internal (const regex_t *preg,
                     const char *string, Idx length,
                     Idx start, Idx last_start, Idx stop,
@@ -833,10 +833,10 @@ re_search_internal (const regex_t *preg,
                 break;
               match_first += incr;
               if (match_first < left_lim || match_first > right_lim)
-                {
-                  err = REG_NOMATCH;
-                  goto free_return;
-                }
+                {
+                  err = REG_NOMATCH;
+                  goto free_return;
+                }
             }
           break;
         }
@@ -953,14 +953,14 @@ re_search_internal (const regex_t *preg,
         }
 
       if (dfa->subexp_map)
-        for (reg_idx = 0; reg_idx + 1 < nmatch; reg_idx++)
-          if (dfa->subexp_map[reg_idx] != reg_idx)
-            {
-              pmatch[reg_idx + 1].rm_so
-                = pmatch[dfa->subexp_map[reg_idx] + 1].rm_so;
-              pmatch[reg_idx + 1].rm_eo
-                = pmatch[dfa->subexp_map[reg_idx] + 1].rm_eo;
-            }
+        for (reg_idx = 0; reg_idx + 1 < nmatch; reg_idx++)
+          if (dfa->subexp_map[reg_idx] != reg_idx)
+            {
+              pmatch[reg_idx + 1].rm_so
+                = pmatch[dfa->subexp_map[reg_idx] + 1].rm_so;
+              pmatch[reg_idx + 1].rm_eo
+                = pmatch[dfa->subexp_map[reg_idx] + 1].rm_eo;
+            }
     }
 
  free_return:
@@ -972,7 +972,7 @@ re_search_internal (const regex_t *preg,
 }
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 prune_impossible_nodes (re_match_context_t *mctx)
 {
   const re_dfa_t *const dfa = mctx->dfa;
@@ -1110,7 +1110,7 @@ acquire_init_state_context (reg_errcode_t *err, const re_match_context_t *mctx,
    index of the buffer.  */
 
 static Idx
-internal_function
+internal_function __attribute_warn_unused_result__
 check_matching (re_match_context_t *mctx, bool fl_longest_match,
                 Idx *p_match_first)
 {
@@ -1149,7 +1149,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
             {
               err = transit_state_bkref (mctx, &cur_state->nodes);
               if (BE (err != REG_NOERROR, 0))
-                return err;
+                return err;
             }
         }
     }
@@ -1176,16 +1176,16 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
       Idx next_char_idx = re_string_cur_idx (&mctx->input) + 1;
 
       if (BE (next_char_idx >= mctx->input.bufs_len, 0)
-          || (BE (next_char_idx >= mctx->input.valid_len, 0)
-              && mctx->input.valid_len < mctx->input.len))
-        {
-          err = extend_buffers (mctx);
-          if (BE (err != REG_NOERROR, 0))
+          || (BE (next_char_idx >= mctx->input.valid_len, 0)
+              && mctx->input.valid_len < mctx->input.len))
+        {
+          err = extend_buffers (mctx);
+          if (BE (err != REG_NOERROR, 0))
             {
               assert (err == REG_ESPACE);
               return REG_ERROR;
             }
-        }
+        }
 
       cur_state = transit_state (&err, mctx, cur_state);
       if (mctx->state_log != NULL)
@@ -1309,17 +1309,17 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
           if (dest_node == REG_MISSING)
             dest_node = candidate;
 
-          else
+          else
             {
               /* In order to avoid infinite loop like "(a*)*", return the second
-                 epsilon-transition if the first was already considered.  */
+                 epsilon-transition if the first was already considered.  */
               if (re_node_set_contains (eps_via_nodes, dest_node))
-                return candidate;
+                return candidate;
 
               /* Otherwise, push the second epsilon-transition on the fail stack.  */
               else if (fs != NULL
                        && push_fail_stack (fs, *pidx, candidate, nregs, regs,
-                                           eps_via_nodes))
+                                           eps_via_nodes))
                 return REG_ERROR;
 
               /* We know we are going to exit.  */
@@ -1385,7 +1385,7 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
 }
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 push_fail_stack (struct re_fail_stack_t *fs, Idx str_idx, Idx dest_node,
                  Idx nregs, regmatch_t *regs, re_node_set *eps_via_nodes)
 {
@@ -1432,7 +1432,7 @@ pop_fail_stack (struct re_fail_stack_t *fs, Idx *pidx, Idx nregs,
    pmatch[i].rm_so == pmatch[i].rm_eo == -1 for 0 < i < nmatch.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 set_regs (const regex_t *preg, const re_match_context_t *mctx, size_t nmatch,
           regmatch_t *pmatch, bool fl_backtrack)
 {
@@ -1667,7 +1667,7 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
       if (mctx->state_log[str_idx])
         {
           err = build_sifted_states (mctx, sctx, str_idx, &cur_dest);
-          if (BE (err != REG_NOERROR, 0))
+          if (BE (err != REG_NOERROR, 0))
             goto free_return;
         }
 
@@ -1686,7 +1686,7 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
 }
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 build_sifted_states (const re_match_context_t *mctx, re_sift_context_t *sctx,
                      Idx str_idx, re_node_set *cur_dest)
 {
@@ -1848,7 +1848,7 @@ update_cur_sifted_state (const re_match_context_t *mctx,
 }
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 add_epsilon_src_nodes (const re_dfa_t *dfa, re_node_set *dest_nodes,
                        const re_node_set *candidates)
 {
@@ -1863,10 +1863,14 @@ add_epsilon_src_nodes (const re_dfa_t *dfa, re_node_set *dest_nodes,
     {
       err = re_node_set_alloc (&state->inveclosure, dest_nodes->nelem);
       if (BE (err != REG_NOERROR, 0))
-        return REG_ESPACE;
+        return REG_ESPACE;
       for (i = 0; i < dest_nodes->nelem; i++)
-        re_node_set_merge (&state->inveclosure,
-                           dfa->inveclosures + dest_nodes->elems[i]);
+        {
+          err = re_node_set_merge (&state->inveclosure,
+                                   dfa->inveclosures + dest_nodes->elems[i]);
+          if (BE (err != REG_NOERROR, 0))
+            return REG_ESPACE;
+        }
     }
   return re_node_set_add_intersect (dest_nodes, candidates,
                                     &state->inveclosure);
@@ -1978,7 +1982,7 @@ check_dst_limits_calc_pos_1 (const re_match_context_t *mctx, int boundaries,
             {
               struct re_backref_cache_entry *ent = mctx->bkref_ents + bkref_idx;
               do
-                {
+                {
                   Idx dst;
                   int cpos;
 
@@ -2000,9 +2004,9 @@ check_dst_limits_calc_pos_1 (const re_match_context_t *mctx, int boundaries,
                   if (dst == from_node)
                     {
                       if (boundaries & 1)
-                        return -1;
+                        return -1;
                       else /* if (boundaries & 2) */
-                        return 0;
+                        return 0;
                     }
 
                   cpos =
@@ -2016,7 +2020,7 @@ check_dst_limits_calc_pos_1 (const re_match_context_t *mctx, int boundaries,
                   if (subexp_idx < BITSET_WORD_BITS)
                     ent->eps_reachable_subexps_map
                       &= ~((bitset_word_t) 1 << subexp_idx);
-                }
+                }
               while (ent++->more);
             }
           break;
@@ -2158,7 +2162,7 @@ check_subexp_limits (const re_dfa_t *dfa, re_node_set *dest_nodes,
 }
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 sift_states_bkref (const re_match_context_t *mctx, re_sift_context_t *sctx,
                    Idx str_idx, const re_node_set *candidates)
 {
@@ -2241,7 +2245,7 @@ sift_states_bkref (const re_match_context_t *mctx, re_sift_context_t *sctx,
           re_node_set_remove (&local_sctx.limits, enabled_idx);
 
           /* mctx->bkref_ents may have changed, reload the pointer.  */
-          entry = mctx->bkref_ents + enabled_idx;
+          entry = mctx->bkref_ents + enabled_idx;
         }
       while (enabled_idx++, entry++->more);
     }
@@ -2288,7 +2292,7 @@ sift_states_iter_mb (const re_match_context_t *mctx, re_sift_context_t *sctx,
    update the destination of STATE_LOG.  */
 
 static re_dfastate_t *
-internal_function
+internal_function __attribute_warn_unused_result__
 transit_state (reg_errcode_t *err, re_match_context_t *mctx,
                re_dfastate_t *state)
 {
@@ -2322,7 +2326,7 @@ transit_state (reg_errcode_t *err, re_match_context_t *mctx,
 
       trtable = state->word_trtable;
       if (BE (trtable != NULL, 1))
-        {
+        {
           unsigned int context;
           context
             = re_string_context_at (&mctx->input,
@@ -2368,21 +2372,21 @@ merge_state_with_log (reg_errcode_t *err, re_match_context_t *mctx,
       unsigned int context;
       re_node_set next_nodes, *log_nodes, *table_nodes = NULL;
       /* If (state_log[cur_idx] != 0), it implies that cur_idx is
-         the destination of a multibyte char/collating element/
-         back reference.  Then the next state is the union set of
-         these destinations and the results of the transition table.  */
+         the destination of a multibyte char/collating element/
+         back reference.  Then the next state is the union set of
+         these destinations and the results of the transition table.  */
       pstate = mctx->state_log[cur_idx];
       log_nodes = pstate->entrance_nodes;
       if (next_state != NULL)
-        {
-          table_nodes = next_state->entrance_nodes;
-          *err = re_node_set_init_union (&next_nodes, table_nodes,
+        {
+          table_nodes = next_state->entrance_nodes;
+          *err = re_node_set_init_union (&next_nodes, table_nodes,
                                              log_nodes);
-          if (BE (*err != REG_NOERROR, 0))
+          if (BE (*err != REG_NOERROR, 0))
             return NULL;
-        }
+        }
       else
-        next_nodes = *log_nodes;
+        next_nodes = *log_nodes;
       /* Note: We already add the nodes of the initial state,
          then we don't need to add them here.  */
 
@@ -2390,12 +2394,12 @@ merge_state_with_log (reg_errcode_t *err, re_match_context_t *mctx,
                                       re_string_cur_idx (&mctx->input) - 1,
                                       mctx->eflags);
       next_state = mctx->state_log[cur_idx]
-        = re_acquire_state_context (err, dfa, &next_nodes, context);
+        = re_acquire_state_context (err, dfa, &next_nodes, context);
       /* We don't need to check errors here, since the return value of
-         this function is next_state and ERR is already set.  */
+         this function is next_state and ERR is already set.  */
 
       if (table_nodes != NULL)
-        re_node_set_free (&next_nodes);
+        re_node_set_free (&next_nodes);
     }
 
   if (BE (dfa->nbackref, 0) && next_state != NULL)
@@ -2436,9 +2440,9 @@ find_recover_state (reg_errcode_t *err, re_match_context_t *mctx)
 
       do
         {
-          if (++cur_str_idx > max)
-            return NULL;
-          re_string_skip_bytes (&mctx->input, 1);
+          if (++cur_str_idx > max)
+            return NULL;
+          re_string_skip_bytes (&mctx->input, 1);
         }
       while (mctx->state_log[cur_str_idx] == NULL);
 
@@ -2546,7 +2550,7 @@ transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
       re_dfastate_t *dest_state;
 
       if (!dfa->nodes[cur_node_idx].accept_mb)
-        continue;
+        continue;
 
       if (dfa->nodes[cur_node_idx].constraint)
         {
@@ -2714,7 +2718,7 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
    delay these checking for prune_impossible_nodes().  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 {
   const re_dfa_t *const dfa = mctx->dfa;
@@ -2727,7 +2731,7 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
       const struct re_backref_cache_entry *entry
         = mctx->bkref_ents + cache_idx;
       do
-        if (entry->node == bkref_node)
+        if (entry->node == bkref_node)
           return REG_NOERROR; /* We already checked it.  */
       while (entry++->more);
     }
@@ -2915,7 +2919,7 @@ find_subexp_node (const re_dfa_t *dfa, const re_node_set *nodes,
    Return REG_NOERROR if it can arrive, or REG_NOMATCH otherwise.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
                Idx top_str, Idx last_node, Idx last_str, int type)
 {
@@ -3077,7 +3081,7 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
          Can't we unify them?  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 check_arrival_add_next_nodes (re_match_context_t *mctx, Idx str_idx,
                               re_node_set *cur_nodes, re_node_set *next_nodes)
 {
@@ -3211,7 +3215,7 @@ check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
    problematic append it to DST_NODES.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 check_arrival_expand_ecl_sub (const re_dfa_t *dfa, re_node_set *dst_nodes,
                               Idx target, Idx ex_subexp, int type)
 {
@@ -3256,7 +3260,7 @@ check_arrival_expand_ecl_sub (const re_dfa_t *dfa, re_node_set *dst_nodes,
    in MCTX->BKREF_ENTS.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes,
                     Idx cur_str, Idx subexp_num, int type)
 {
@@ -3622,7 +3626,7 @@ group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
         }
 #ifdef RE_ENABLE_I18N
       else if (type == OP_UTF8_PERIOD)
-        {
+        {
           if (ASCII_CHARS % BITSET_WORD_BITS == 0)
             memset (accepts, -1, ASCII_CHARS / CHAR_BIT);
           else
@@ -3631,7 +3635,7 @@ group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
             bitset_clear (accepts, '\n');
           if (dfa->syntax & RE_DOT_NOT_NULL)
             bitset_clear (accepts, '\0');
-        }
+        }
 #endif
       else
         continue;
@@ -3836,7 +3840,7 @@ check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
   if (node->type == OP_PERIOD)
     {
       if (char_len <= 1)
-        return 0;
+        return 0;
       /* FIXME: I don't think this if is needed, as both '\n'
          and '\0' are char_len == 1.  */
       /* '.' accepts any one character except the following two cases.  */
@@ -3949,15 +3953,20 @@ check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
                 _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
               indirect = (const int32_t *)
                 _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
-              idx = findidx (&cp);
+              int32_t idx = findidx (&cp);
               if (idx > 0)
                 for (i = 0; i < cset->nequiv_classes; ++i)
                   {
                     int32_t equiv_class_idx = cset->equiv_classes[i];
-                    size_t weight_len = weights[idx];
-                    if (weight_len == weights[equiv_class_idx])
+                    size_t weight_len = weights[idx & 0xffffff];
+                    if (weight_len == weights[equiv_class_idx & 0xffffff]
+                        && (idx >> 24) == (equiv_class_idx >> 24))
                       {
                         Idx cnt = 0;
+
+                        idx &= 0xffffff;
+                        equiv_class_idx &= 0xffffff;
+
                         while (cnt <= weight_len
                                && (weights[equiv_class_idx + 1 + cnt]
                                    == weights[idx + 1 + cnt]))
@@ -4123,7 +4132,7 @@ check_node_accept (const re_match_context_t *mctx, const re_token_t *node,
 /* Extend the buffers, if the buffers have run out.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 extend_buffers (re_match_context_t *mctx)
 {
   reg_errcode_t ret;
@@ -4186,7 +4195,7 @@ extend_buffers (re_match_context_t *mctx)
 /* Initialize MCTX.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 match_ctx_init (re_match_context_t *mctx, int eflags, Idx n)
 {
   mctx->eflags = eflags;
@@ -4266,7 +4275,7 @@ match_ctx_free (re_match_context_t *mctx)
 */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 match_ctx_add_entry (re_match_context_t *mctx, Idx node, Idx str_idx, Idx from,
                      Idx to)
 {
@@ -4338,7 +4347,7 @@ search_cur_bkref_entry (const re_match_context_t *mctx, Idx str_idx)
    at STR_IDX.  */
 
 static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
 match_ctx_add_subtop (re_match_context_t *mctx, Idx node, Idx str_idx)
 {
 #ifdef DEBUG