Update.
2005-01-27 Paolo Bonzini <bonzini@gnu.org>
[BZ #558]
* posix/regcomp.c (calc_inveclosure): Return reg_errcode_t.
Initialize the node sets in dfa->inveclosures.
(analyze): Initialize inveclosures only if it is needed.
Check errors from calc_inveclosure.
* posix/regex_internal.c (re_dfa_add_node): Do not initialize
the inveclosure node set.
* posix/regexec.c (re_search_internal): If nmatch includes unused
subexpressions, reset them to { rm_so: -1, rm_eo: -1 } here.
* posix/regcomp.c (parse_bracket_exp) [!RE_ENABLE_I18N]:
Do build a SIMPLE_BRACKET token.
* posix/regexec.c (transit_state_mb): Do not examine nodes
where ACCEPT_MB is not set.
+2005-01-27 Paolo Bonzini <bonzini@gnu.org>
+
+ [BZ #558]
+ * posix/regcomp.c (calc_inveclosure): Return reg_errcode_t.
+ Initialize the node sets in dfa->inveclosures.
+ (analyze): Initialize inveclosures only if it is needed.
+ Check errors from calc_inveclosure.
+ * posix/regex_internal.c (re_dfa_add_node): Do not initialize
+ the inveclosure node set.
+ * posix/regexec.c (re_search_internal): If nmatch includes unused
+ subexpressions, reset them to { rm_so: -1, rm_eo: -1 } here.
+
+ * posix/regcomp.c (parse_bracket_exp) [!RE_ENABLE_I18N]:
+ Do build a SIMPLE_BRACKET token.
+
+ * posix/regexec.c (transit_state_mb): Do not examine nodes
+ where ACCEPT_MB is not set.
+
2005-01-27 Jakub Jelinek <jakub@redhat.com>
* stdlib/tst-fmtmsg.c: Include stdlib.h.
static reg_errcode_t calc_eclosure (re_dfa_t *dfa);
static reg_errcode_t calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa,
int node, int root);
-static void calc_inveclosure (re_dfa_t *dfa);
+static reg_errcode_t calc_inveclosure (re_dfa_t *dfa);
static int fetch_number (re_string_t *input, re_token_t *token,
reg_syntax_t syntax);
static void fetch_token (re_token_t *result, re_string_t *input,
dfa->org_indices = re_malloc (int, dfa->nodes_alloc);
dfa->edests = re_malloc (re_node_set, dfa->nodes_alloc);
dfa->eclosures = re_malloc (re_node_set, dfa->nodes_alloc);
- dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_alloc);
if (BE (dfa->nexts == NULL || dfa->org_indices == NULL || dfa->edests == NULL
- || dfa->eclosures == NULL || dfa->inveclosures == NULL, 0))
+ || dfa->eclosures == NULL, 0))
return REG_ESPACE;
dfa->subexp_map = re_malloc (int, preg->re_nsub);
ret = calc_eclosure (dfa);
if (BE (ret != REG_NOERROR, 0))
return ret;
- calc_inveclosure (dfa);
+
+ /* We only need this during the prune_impossible_nodes pass in regexec.c;
+ skip it if p_i_n will not run, as calc_inveclosure can be quadratic. */
+ if ((!preg->no_sub && preg->re_nsub > 0 && dfa->has_plural_match)
+ || dfa->nbackref)
+ {
+ dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_len);
+ if (BE (dfa->inveclosures == NULL, 0))
+ return REG_ESPACE;
+ ret = calc_inveclosure (dfa);
+ }
+
return ret;
}
return REG_NOERROR;
}
-static void
+static reg_errcode_t
calc_inveclosure (dfa)
re_dfa_t *dfa;
{
- int src, idx, dest;
+ int src, idx, ret;
+ for (idx = 0; idx < dfa->nodes_len; ++idx)
+ re_node_set_init_empty (dfa->inveclosures + idx);
+
for (src = 0; src < dfa->nodes_len; ++src)
{
+ int *elems = dfa->eclosures[src].elems;
for (idx = 0; idx < dfa->eclosures[src].nelem; ++idx)
{
- dest = dfa->eclosures[src].elems[idx];
- re_node_set_insert_last (dfa->inveclosures + dest, src);
+ ret = re_node_set_insert_last (dfa->inveclosures + elems[idx], src);
+ if (BE (ret == -1, 0))
+ return REG_ESPACE;
}
}
+
+ return REG_NOERROR;
}
/* Calculate "eclosure" for all the node in DFA. */
}
}
else
+#endif /* not RE_ENABLE_I18N */
{
+#ifdef RE_ENABLE_I18N
+ free_charset (mbcset);
+#endif
/* Build a tree for simple bracket. */
br_token.type = SIMPLE_BRACKET;
br_token.opr.sbcset = sbcset;
work_tree = create_token_tree (dfa, NULL, NULL, &br_token);
if (BE (work_tree == NULL, 0))
goto parse_bracket_exp_espace;
-
- free_charset (mbcset);
}
-#endif /* not RE_ENABLE_I18N */
return work_tree;
parse_bracket_exp_espace:
{
int new_nodes_alloc = dfa->nodes_alloc * 2;
int *new_nexts, *new_indices;
- re_node_set *new_edests, *new_eclosures, *new_inveclosures;
+ re_node_set *new_edests, *new_eclosures;
re_token_t *new_array = re_realloc (dfa->nodes, re_token_t,
new_nodes_alloc);
new_indices = re_realloc (dfa->org_indices, int, 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);
- new_inveclosures = re_realloc (dfa->inveclosures, re_node_set,
- new_nodes_alloc);
if (BE (new_nexts == NULL || new_indices == NULL
- || new_edests == NULL || new_eclosures == NULL
- || new_inveclosures == NULL, 0))
+ || new_edests == NULL || new_eclosures == NULL, 0))
return -1;
dfa->nexts = new_nexts;
dfa->org_indices = new_indices;
dfa->edests = new_edests;
dfa->eclosures = new_eclosures;
- dfa->inveclosures = new_inveclosures;
dfa->nodes_alloc = new_nodes_alloc;
}
dfa->nodes[dfa->nodes_len] = token;
dfa->nexts[dfa->nodes_len] = -1;
re_node_set_init_empty (dfa->edests + dfa->nodes_len);
re_node_set_init_empty (dfa->eclosures + dfa->nodes_len);
- re_node_set_init_empty (dfa->inveclosures + dfa->nodes_len);
return dfa->nodes_len++;
}
re_dfa_t *dfa = (re_dfa_t *)preg->buffer;
int left_lim, right_lim, incr;
int fl_longest_match, match_first, match_kind, match_last = -1;
+ int extra_nmatch;
int sb, ch;
#if defined _LIBC || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
re_match_context_t mctx = { .dfa = dfa };
mctx.dfa = dfa;
#endif
+ extra_nmatch = (nmatch > preg->re_nsub) ? nmatch - (preg->re_nsub + 1) : 0;
+ nmatch -= extra_nmatch;
+
/* Check if the DFA haven't been compiled. */
if (BE (preg->used == 0 || dfa->init_state == NULL
|| dfa->init_state_word == NULL || dfa->init_state_nl == NULL
pmatch[reg_idx].rm_so += match_first;
pmatch[reg_idx].rm_eo += match_first;
}
+ for (reg_idx = 0; reg_idx < extra_nmatch; ++reg_idx)
+ {
+ pmatch[nmatch + reg_idx].rm_so = -1;
+ pmatch[nmatch + reg_idx].rm_eo = -1;
+ }
if (dfa->subexp_map)
- for (reg_idx = 0;
- reg_idx + 1 < nmatch && reg_idx < preg->re_nsub;
- reg_idx++)
+ for (reg_idx = 0; reg_idx + 1 < nmatch; reg_idx++)
if (dfa->subexp_map[reg_idx] != reg_idx)
{
pmatch[reg_idx + 1].rm_so
int fl_backtrack;
{
re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
- int idx, cur_node, real_nmatch;
+ int idx, cur_node;
re_node_set eps_via_nodes;
struct re_fail_stack_t *fs;
struct re_fail_stack_t fs_body = { 0, 2, NULL };
fs = NULL;
cur_node = dfa->init_node;
- real_nmatch = (nmatch <= preg->re_nsub) ? nmatch : preg->re_nsub + 1;
re_node_set_init_empty (&eps_via_nodes);
- prev_idx_match = (regmatch_t *) alloca (sizeof (regmatch_t) * real_nmatch);
- memcpy (prev_idx_match, pmatch, sizeof (regmatch_t) * real_nmatch);
+ prev_idx_match = (regmatch_t *) alloca (sizeof (regmatch_t) * nmatch);
+ memcpy (prev_idx_match, pmatch, sizeof (regmatch_t) * nmatch);
for (idx = pmatch[0].rm_so; idx <= pmatch[0].rm_eo ;)
{
- update_regs (dfa, pmatch, prev_idx_match, cur_node, idx, real_nmatch);
+ update_regs (dfa, pmatch, prev_idx_match, cur_node, idx, nmatch);
if (idx == pmatch[0].rm_eo && cur_node == mctx->last_node)
{
{
re_node_set dest_nodes, *new_nodes;
int cur_node_idx = pstate->nodes.elems[i];
- int naccepted = 0, dest_idx;
+ int naccepted, dest_idx;
unsigned int context;
re_dfastate_t *dest_state;
+ if (!dfa->nodes[cur_node_idx].accept_mb)
+ continue;
+
if (dfa->nodes[cur_node_idx].constraint)
{
context = re_string_context_at (&mctx->input,
}
/* How many bytes the node can accept? */
- if (dfa->nodes[cur_node_idx].accept_mb)
- naccepted = check_node_accept_bytes (dfa, cur_node_idx, &mctx->input,
- re_string_cur_idx (&mctx->input));
+ naccepted = check_node_accept_bytes (dfa, cur_node_idx, &mctx->input,
+ re_string_cur_idx (&mctx->input));
if (naccepted == 0)
continue;
#ifdef DEBUG
assert (dfa->nexts[cur_node_idx] != -1);
#endif
- /* `cur_node_idx' may point the entity of the OP_CONTEXT_NODE,
- then we use pstate->nodes.elems[i] instead. */
- new_nodes = dfa->eclosures + dfa->nexts[pstate->nodes.elems[i]];
+ new_nodes = dfa->eclosures + dfa->nexts[cur_node_idx];
dest_state = mctx->state_log[dest_idx];
if (dest_state == NULL)
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