diff options
| -rw-r--r-- | ChangeLog | 23 | ||||
| -rw-r--r-- | posix/regexec.c | 94 |
2 files changed, 47 insertions, 70 deletions
@@ -1,3 +1,26 @@ +2004-11-03 Paolo Bonzini <bonzini@gnu.org> + + * posix/regex_internal.h (struct re_backref_cache_entry): Remove flag + field. + (struct re_sift_context_t): Remove cur_bkref, cls_subexp_idx, + check_subexp fields. Move limits last. + * posix/regexec.c (match_ctx_clear_flag): Remove. + (sift_ctx_init): Remove check_subexp parameter. Do not set removed + fields. Callers adjusted. + (expand_bkref_cache): Remove last_str parameter. Callers adjusted. + (re_search_internal): Remove fast_translate variable. + (update_cur_sifted_state): Pass candidates as the final parameter + to sift_states_bkref. + (sift_states_bkref): Change last unused parameter to be "candidates", + do not fetch candidates into a local variable. + Remove dead test for "node == sctx->bkref", and the cur_bkref_idx + variable. + Remove loops that set/reset the flag field of backref cache entries. + (check_arrival_add_next_nodes): Use a signed int to hold the return + value of re_node_set_insert. + (group_nodes_into_DFAstates): Likewise. + (match_ctx_add_entry): Do not set the flag field of the new entry. + 2004-11-05 Roland McGrath <roland@redhat.com> * sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Define diff --git a/posix/regexec.c b/posix/regexec.c index b7b5b1a6d4..63436d19eb 100644 --- a/posix/regexec.c +++ b/posix/regexec.c @@ -29,7 +29,6 @@ static reg_errcode_t match_ctx_add_entry (re_match_context_t *cache, int node, internal_function; static int search_cur_bkref_entry (re_match_context_t *mctx, int str_idx) internal_function; -static void match_ctx_clear_flag (re_match_context_t *mctx) internal_function; static reg_errcode_t match_ctx_add_subtop (re_match_context_t *mctx, int node, int str_idx) internal_function; static re_sub_match_last_t * match_ctx_add_sublast (re_sub_match_top_t *subtop, @@ -37,7 +36,7 @@ static re_sub_match_last_t * match_ctx_add_sublast (re_sub_match_top_t *subtop, internal_function; static void sift_ctx_init (re_sift_context_t *sctx, re_dfastate_t **sifted_sts, re_dfastate_t **limited_sts, int last_node, - int last_str_idx, int check_subexp) + int last_str_idx) internal_function; static reg_errcode_t re_search_internal (const regex_t *preg, const char *string, int length, @@ -118,7 +117,7 @@ static reg_errcode_t check_subexp_limits (re_dfa_t *dfa, int str_idx) internal_function; static reg_errcode_t sift_states_bkref (re_match_context_t *mctx, re_sift_context_t *sctx, - int str_idx, re_node_set *dest_nodes) internal_function; + int str_idx, const re_node_set *candidates) internal_function; static reg_errcode_t clean_state_log_if_needed (re_match_context_t *mctx, int next_state_log_idx) internal_function; static reg_errcode_t merge_state_array (re_dfa_t *dfa, re_dfastate_t **dst, @@ -170,8 +169,7 @@ static reg_errcode_t check_arrival_expand_ecl_sub (re_dfa_t *dfa, int type) internal_function; static reg_errcode_t expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes, int cur_str, - int last_str, int subexp_num, - int type) internal_function; + int subexp_num, int type) internal_function; static re_dfastate_t **build_trtable (re_dfa_t *dfa, re_dfastate_t *state) internal_function; #ifdef RE_ENABLE_I18N @@ -910,9 +908,8 @@ prune_impossible_nodes (mctx) { memset (lim_states, '\0', sizeof (re_dfastate_t *) * (match_last + 1)); - match_ctx_clear_flag (mctx); sift_ctx_init (&sctx, sifted_states, lim_states, halt_node, - match_last, 0); + match_last); ret = sift_states_backward (mctx, &sctx); re_node_set_free (&sctx.limits); if (BE (ret != REG_NOERROR, 0)) @@ -942,8 +939,7 @@ prune_impossible_nodes (mctx) } else { - sift_ctx_init (&sctx, sifted_states, lim_states, halt_node, - match_last, 0); + sift_ctx_init (&sctx, sifted_states, lim_states, halt_node, match_last); ret = sift_states_backward (mctx, &sctx); re_node_set_free (&sctx.limits); if (BE (ret != REG_NOERROR, 0)) @@ -1694,7 +1690,7 @@ update_cur_sifted_state (mctx, sctx, str_idx, dest_nodes) if ((mctx->state_log[str_idx] != NULL && mctx->state_log[str_idx]->has_backref)) { - err = sift_states_bkref (mctx, sctx, str_idx, dest_nodes); + err = sift_states_bkref (mctx, sctx, str_idx, candidates); if (BE (err != REG_NOERROR, 0)) return err; } @@ -2009,29 +2005,23 @@ check_subexp_limits (dfa, dest_nodes, candidates, limits, bkref_ents, str_idx) } static reg_errcode_t -sift_states_bkref (mctx, sctx, str_idx, dest_nodes) +sift_states_bkref (mctx, sctx, str_idx, candidates) re_match_context_t *mctx; re_sift_context_t *sctx; int str_idx; - re_node_set *dest_nodes; + const re_node_set *candidates; { re_dfa_t *const dfa = mctx->dfa; reg_errcode_t err; int node_idx, node; re_sift_context_t local_sctx; - const re_node_set *candidates; - candidates = ((mctx->state_log[str_idx] == NULL) ? &empty_set - : &mctx->state_log[str_idx]->nodes); local_sctx.sifted_states = NULL; /* Mark that it hasn't been initialized. */ for (node_idx = 0; node_idx < candidates->nelem; ++node_idx) { - int cur_bkref_idx = re_string_cur_idx (&mctx->input); re_token_type_t type; node = candidates->elems[node_idx]; type = dfa->nodes[node].type; - if (node == sctx->cur_bkref && str_idx == cur_bkref_idx) - continue; /* Avoid infinite loop for the REs like "()\1+". */ if (node == sctx->last_node && str_idx == sctx->last_str_idx) continue; @@ -2040,7 +2030,7 @@ sift_states_bkref (mctx, sctx, str_idx, dest_nodes) int enabled_idx = search_cur_bkref_entry (mctx, str_idx); for (; enabled_idx < mctx->nbkref_ents; ++enabled_idx) { - int disabled_idx, subexp_len, to_idx, dst_node; + int subexp_len, to_idx, dst_node; struct re_backref_cache_entry *entry; entry = mctx->bkref_ents + enabled_idx; if (entry->str_idx > str_idx) @@ -2061,17 +2051,6 @@ sift_states_bkref (mctx, sctx, str_idx, dest_nodes) continue; { re_dfastate_t *cur_state; - entry->flag = 0; - for (disabled_idx = enabled_idx + 1; - disabled_idx < mctx->nbkref_ents; ++disabled_idx) - { - struct re_backref_cache_entry *entry2; - entry2 = mctx->bkref_ents + disabled_idx; - if (entry2->str_idx > str_idx) - break; - entry2->flag = (entry2->node == node) ? 1 : entry2->flag; - } - if (local_sctx.sifted_states == NULL) { local_sctx = *sctx; @@ -2102,21 +2081,8 @@ sift_states_bkref (mctx, sctx, str_idx, dest_nodes) } local_sctx.sifted_states[str_idx] = cur_state; re_node_set_remove (&local_sctx.limits, enabled_idx); - /* We must not use the variable entry here, since - mctx->bkref_ents might be realloced. */ - mctx->bkref_ents[enabled_idx].flag = 1; } } - enabled_idx = search_cur_bkref_entry (mctx, str_idx); - for (; enabled_idx < mctx->nbkref_ents; ++enabled_idx) - { - struct re_backref_cache_entry *entry; - entry = mctx->bkref_ents + enabled_idx; - if (entry->str_idx > str_idx) - break; - if (entry->node == node) - entry->flag = 0; - } } } err = REG_NOERROR; @@ -2871,7 +2837,7 @@ check_arrival (mctx, path, top_node, top_str, last_node, last_str, { if (next_nodes.nelem) { - err = expand_bkref_cache (mctx, &next_nodes, str_idx, last_str, + err = expand_bkref_cache (mctx, &next_nodes, str_idx, subexp_num, type); if (BE ( err != REG_NOERROR, 0)) { @@ -2920,7 +2886,7 @@ check_arrival (mctx, path, top_node, top_str, last_node, last_str, re_node_set_free (&next_nodes); return err; } - err = expand_bkref_cache (mctx, &next_nodes, str_idx, last_str, + err = expand_bkref_cache (mctx, &next_nodes, str_idx, subexp_num, type); if (BE ( err != REG_NOERROR, 0)) { @@ -2969,6 +2935,7 @@ check_arrival_add_next_nodes (mctx, str_idx, cur_nodes, next_nodes) re_node_set *cur_nodes, *next_nodes; { re_dfa_t *const dfa = mctx->dfa; + int result; int cur_idx; reg_errcode_t err; re_node_set union_set; @@ -3002,8 +2969,8 @@ check_arrival_add_next_nodes (mctx, str_idx, cur_nodes, next_nodes) return err; } } - err = re_node_set_insert (&union_set, next_node); - if (BE (err < 0, 0)) + result = re_node_set_insert (&union_set, next_node); + if (BE (result < 0, 0)) { re_node_set_free (&union_set); return REG_ESPACE; @@ -3022,8 +2989,8 @@ check_arrival_add_next_nodes (mctx, str_idx, cur_nodes, next_nodes) if (naccepted || check_node_accept (mctx, dfa->nodes + cur_node, str_idx)) { - err = re_node_set_insert (next_nodes, dfa->nexts[cur_node]); - if (BE (err < 0, 0)) + result = re_node_set_insert (next_nodes, dfa->nexts[cur_node]); + if (BE (result < 0, 0)) { re_node_set_free (&union_set); return REG_ESPACE; @@ -3140,10 +3107,10 @@ check_arrival_expand_ecl_sub (dfa, dst_nodes, target, ex_subexp, type) in MCTX->BKREF_ENTS. */ static reg_errcode_t -expand_bkref_cache (mctx, cur_nodes, cur_str, last_str, subexp_num, +expand_bkref_cache (mctx, cur_nodes, cur_str, subexp_num, type) re_match_context_t *mctx; - int cur_str, last_str, subexp_num, type; + int cur_str, subexp_num, type; re_node_set *cur_nodes; { re_dfa_t *const dfa = mctx->dfa; @@ -3463,6 +3430,7 @@ group_nodes_into_DFAstates (dfa, state, dests_node, dests_ch) bitset *dests_ch; { reg_errcode_t err; + int result; int i, j, k; int ndests; /* Number of the destinations from `state'. */ bitset accepts; /* Characters a node can accept. */ @@ -3611,8 +3579,8 @@ group_nodes_into_DFAstates (dfa, state, dests_node, dests_ch) } /* Put the position in the current group. */ - err = re_node_set_insert (&dests_node[j], cur_nodes->elems[i]); - if (BE (err < 0, 0)) + result = re_node_set_insert (&dests_node[j], cur_nodes->elems[i]); + if (BE (result < 0, 0)) goto error_return; /* If all characters are consumed, go to next node. */ @@ -4150,8 +4118,7 @@ match_ctx_add_entry (mctx, node, str_idx, from, to) mctx->bkref_ents[mctx->nbkref_ents].node = node; mctx->bkref_ents[mctx->nbkref_ents].str_idx = str_idx; mctx->bkref_ents[mctx->nbkref_ents].subexp_from = from; - mctx->bkref_ents[mctx->nbkref_ents].subexp_to = to; - mctx->bkref_ents[mctx->nbkref_ents++].flag = 0; + mctx->bkref_ents[mctx->nbkref_ents++].subexp_to = to; if (mctx->max_mb_elem_len < to - from) mctx->max_mb_elem_len = to - from; return REG_NOERROR; @@ -4178,15 +4145,6 @@ search_cur_bkref_entry (mctx, str_idx) return left; } -static void -match_ctx_clear_flag (mctx) - re_match_context_t *mctx; -{ - int i; - for (i = 0; i < mctx->nbkref_ents; ++i) - mctx->bkref_ents[i].flag = 0; -} - /* Register the node NODE, whose type is OP_OPEN_SUBEXP, and which matches at STR_IDX. */ @@ -4250,18 +4208,14 @@ match_ctx_add_sublast (subtop, node, str_idx) } static void -sift_ctx_init (sctx, sifted_sts, limited_sts, last_node, last_str_idx, - check_subexp) +sift_ctx_init (sctx, sifted_sts, limited_sts, last_node, last_str_idx) re_sift_context_t *sctx; re_dfastate_t **sifted_sts, **limited_sts; - int last_node, last_str_idx, check_subexp; + int last_node, last_str_idx; { sctx->sifted_states = sifted_sts; sctx->limited_states = limited_sts; sctx->last_node = last_node; sctx->last_str_idx = last_str_idx; - sctx->check_subexp = check_subexp; - sctx->cur_bkref = -1; - sctx->cls_subexp_idx = -1; re_node_set_init_empty (&sctx->limits); } |