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Diffstat (limited to 'posix/regexec.c')
-rw-r--r--posix/regexec.c94
1 files changed, 24 insertions, 70 deletions
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);
}