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2003-12-23  Paolo Bonzini  <bonzini@gnu.org>

	* posix/regex_internal.c (re_dfa_add_node): Initialize opt_subexp.
	* posix/regex_internal.h (re_token_type_t): Put OP_DUP_PLUS
	among the tokens, rather than among the epsilon-transiting nodes.
	(re_token_t): Add the opt_subexp flag.
	* posix/regcomp.c (optimize_utf8, calc_first,
	calc_next, calc_epsdest): Don't consider OP_DUP_PLUS.
	(mark_opt_subexp, mark_opt_subexp_iter): New functions.
	(parse_dup_op): Mostly rewritten, lowering OP_DUP_PLUS to
	OP_DUP_ASTERISK and marking optional subexpressions
	as such using mark_opt_subexp.
	* posix/regexec.c (set_regs): Initialize PREV_INDEX_MATCH
	and pass it to update_regs.
	(update_regs): Use the PREV_INDEX_MATCH parameter, together
	with the opt_subexp flag, in order to discard a final empty
	match of a repeated subexpression.
	* posix/BOOST.tests: Adjust test vectors.
	* posix/PCRE.tests: Likewise.
	* posix/rxspencer/tests: Likewise.

2003-12-17  Paolo Bonzini  <bonzini@gnu.org>
2003-12-16  Paolo Bonzini  <bonzini@gnu.org>
2003-12-17  Paolo Bonzini  <bonzini@gnu.org>
2003-12-16  Jakub Jelinek  <jakub@redhat.com>
2003-04-06  Kaz Kojima  <kkojima@rr.iij4u.or.jp>
2003-02-20  Paolo Bonzini  <bonzini@gnu.org>
2003-01-12  Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>
2003-01-09  Richard Henderson  <rth@redhat.com>
2003-01-09  Richard Henderson  <rth@redhat.com>
2003-01-03  Paul Eggert  <eggert@twinsun.com>
This commit is contained in:
Ulrich Drepper
2003-12-27 23:40:06 +00:00
parent cb5b9388da
commit 6b6557e8b3
8 changed files with 248 additions and 185 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
posix/regexec.c
View File

@ -62,7 +62,8 @@ static int check_halt_node_context (const re_dfa_t *dfa, int node,
static int check_halt_state_context (const regex_t *preg,
const re_dfastate_t *state,
const re_match_context_t *mctx, int idx) internal_function;
static void update_regs (re_dfa_t *dfa, regmatch_t *pmatch, int cur_node,
static void update_regs (re_dfa_t *dfa, regmatch_t *pmatch,
regmatch_t *prev_idx_match, int cur_node,
int cur_idx, int nmatch) internal_function;
static int proceed_next_node (const regex_t *preg, int nregs, regmatch_t *regs,
const re_match_context_t *mctx,
@ -1277,11 +1278,13 @@ set_regs (preg, mctx, nmatch, pmatch, fl_backtrack)
regmatch_t *pmatch;
int fl_backtrack;
{
re_dfa_t *dfa = (re_dfa_t *)preg->buffer;
re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
int idx, cur_node, real_nmatch;
re_node_set eps_via_nodes;
struct re_fail_stack_t *fs;
struct re_fail_stack_t fs_body = {0, 2, NULL};
struct re_fail_stack_t fs_body = { 0, 2, NULL };
regmatch_t *prev_idx_match;
#ifdef DEBUG
assert (nmatch > 1);
assert (mctx->state_log != NULL);
@ -1290,15 +1293,23 @@ set_regs (preg, mctx, nmatch, pmatch, fl_backtrack)
{
fs = &fs_body;
fs->stack = re_malloc (struct re_fail_stack_ent_t, fs->alloc);
if (fs->stack == NULL)
return REG_ESPACE;
}
else
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);
for (idx = pmatch[0].rm_so; idx <= pmatch[0].rm_eo ;)
{
update_regs (dfa, pmatch, cur_node, idx, real_nmatch);
update_regs (dfa, pmatch, prev_idx_match, cur_node, idx, real_nmatch);
if (idx == pmatch[0].rm_eo && cur_node == mctx->last_node)
{
int reg_idx;
@ -1362,31 +1373,55 @@ free_fail_stack_return (fs)
}
static void
update_regs (dfa, pmatch, cur_node, cur_idx, nmatch)
update_regs (dfa, pmatch, prev_idx_match, cur_node, cur_idx, nmatch)
re_dfa_t *dfa;
regmatch_t *pmatch;
regmatch_t *pmatch, *prev_idx_match;
int cur_node, cur_idx, nmatch;
{
int type = dfa->nodes[cur_node].type;
int reg_num;
if (type != OP_OPEN_SUBEXP && type != OP_CLOSE_SUBEXP)
return;
reg_num = dfa->nodes[cur_node].opr.idx + 1;
if (reg_num >= nmatch)
return;
if (type == OP_OPEN_SUBEXP)
{
int reg_num = dfa->nodes[cur_node].opr.idx + 1;
/* We are at the first node of this sub expression. */
pmatch[reg_num].rm_so = cur_idx;
pmatch[reg_num].rm_eo = -1;
if (reg_num < nmatch)
{
pmatch[reg_num].rm_so = cur_idx;
pmatch[reg_num].rm_eo = -1;
}
}
else if (type == OP_CLOSE_SUBEXP)
/* We are at the first node of this sub expression. */
pmatch[reg_num].rm_eo = cur_idx;
{
int reg_num = dfa->nodes[cur_node].opr.idx + 1;
if (reg_num < nmatch)
{
/* We are at the last node of this sub expression. */
if (pmatch[reg_num].rm_so < cur_idx)
{
pmatch[reg_num].rm_eo = cur_idx;
/* This is a non-empty match or we are not inside an optional
subexpression. Accept this right away. */
memcpy (prev_idx_match, pmatch, sizeof (regmatch_t) * nmatch);
}
else
{
if (dfa->nodes[cur_node].opt_subexp
&& prev_idx_match[reg_num].rm_so != -1)
/* We transited through an empty match for an optional
subexpression, like (a?)*, and this is not the subexp's
first match. Copy back the old content of the registers
so that matches of an inner subexpression are undone as
well, like in ((a?))*. */
memcpy (pmatch, prev_idx_match, sizeof (regmatch_t) * nmatch);
else
/* We completed a subexpression, but it may be part of
an optional one, so do not update PREV_IDX_MATCH. */
pmatch[reg_num].rm_eo = cur_idx;
}
}
}
}
#define NUMBER_OF_STATE 1
/* This function checks the STATE_LOG from the SCTX->last_str_idx to 0
and sift the nodes in each states according to the following rules.
Updated state_log will be wrote to STATE_LOG.
@ -3279,7 +3314,7 @@ out_free:
character ch. See group_nodes_into_DFAstates. */
for (j = 0; (dests_ch[j][i] & mask) == 0; ++j)
;
/* j-th destination accepts the word character ch. */
if (IS_WORD_CHAR (ch))
trtable[ch] = dest_states_word[j];
@ -3298,7 +3333,7 @@ out_free:
2 * SBC_MAX);
if (BE (trtable == NULL, 0))
goto out_free;
/* For all characters ch...: */
for (i = 0; i < BITSET_UINTS; ++i)
for (ch = i * UINT_BITS, elem = acceptable[i], mask = 1;
@ -3310,13 +3345,13 @@ out_free:
character ch. See group_nodes_into_DFAstates. */
for (j = 0; (dests_ch[j][i] & mask) == 0; ++j)
;
/* j-th destination accepts the word character ch. */
trtable[ch] = dest_states[j];
trtable[ch + SBC_MAX] = dest_states_word[j];
}
}
/* new line */
if (bitset_contain (acceptable, NEWLINE_CHAR))
{