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Diffstat (limited to 'posix/regexec.c')
-rw-r--r--posix/regexec.c94
1 files changed, 47 insertions, 47 deletions
diff --git a/posix/regexec.c b/posix/regexec.c
index 91b48dd..1b21b69 100644
--- a/posix/regexec.c
+++ b/posix/regexec.c
@@ -175,8 +175,8 @@ static reg_errcode_t check_arrival_expand_ecl_sub (re_dfa_t *dfa,
static reg_errcode_t expand_bkref_cache (re_match_context_t *mctx,
re_node_set *cur_nodes, int cur_str,
int subexp_num, int type) internal_function;
-static re_dfastate_t **build_trtable (re_dfa_t *dfa,
- re_dfastate_t *state) internal_function;
+static int build_trtable (re_dfa_t *dfa,
+ re_dfastate_t *state) internal_function;
#ifdef RE_ENABLE_I18N
static int check_node_accept_bytes (re_dfa_t *dfa, int node_idx,
const re_string_t *input, int idx) internal_function;
@@ -2218,7 +2218,6 @@ transit_state (err, mctx, state)
re_match_context_t *mctx;
re_dfastate_t *state;
{
- re_dfa_t *const dfa = mctx->dfa;
re_dfastate_t **trtable;
unsigned char ch;
@@ -2233,21 +2232,22 @@ transit_state (err, mctx, state)
#endif /* RE_ENABLE_I18N */
/* Then decide the next state with the single byte. */
- if (1)
+#if 0
+ if (0)
+ /* don't use transition table */
+ return transit_state_sb (err, mctx, state);
+#endif
+
+ /* Use transition table */
+ ch = re_string_fetch_byte (&mctx->input);
+ for (;;)
{
- /* Use transition table */
- ch = re_string_fetch_byte (&mctx->input);
trtable = state->trtable;
- if (trtable == NULL)
- {
- trtable = build_trtable (dfa, state);
- if (trtable == NULL)
- {
- *err = REG_ESPACE;
- return NULL;
- }
- }
- if (BE (state->word_trtable, 0))
+ if (BE (trtable != NULL, 1))
+ return trtable[ch];
+
+ trtable = state->word_trtable;
+ if (BE (trtable != NULL, 1))
{
unsigned int context;
context
@@ -2259,14 +2259,15 @@ transit_state (err, mctx, state)
else
return trtable[ch];
}
- else
- return trtable[ch];
+
+ if (!build_trtable (mctx->dfa, state))
+ {
+ *err = REG_ESPACE;
+ return NULL;
+ }
+
+ /* Retry, we now have a transition table. */
}
-#if 0
- else
- /* don't use transition table */
- return transit_state_sb (err, mctx, state);
-#endif
}
/* Update the state_log if we need */
@@ -3273,15 +3274,15 @@ expand_bkref_cache (mctx, cur_nodes, cur_str, subexp_num,
}
/* Build transition table for the state.
- Return the new table if succeeded, otherwise return NULL. */
+ Return 1 if succeeded, otherwise return NULL. */
-static re_dfastate_t **
+static int
build_trtable (dfa, state)
re_dfa_t *dfa;
re_dfastate_t *state;
{
reg_errcode_t err;
- int i, j, ch;
+ int i, j, ch, need_word_trtable = 0;
unsigned int elem, mask;
int dests_node_malloced = 0, dest_states_malloced = 0;
int ndests; /* Number of the destination states from `state'. */
@@ -3298,20 +3299,20 @@ build_trtable (dfa, state)
#ifdef _LIBC
if (__libc_use_alloca ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX))
dests_node = (re_node_set *)
- alloca ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX);
+ alloca ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX);
else
#endif
{
dests_node = (re_node_set *)
- malloc ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX);
+ malloc ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX);
if (BE (dests_node == NULL, 0))
- return NULL;
+ return 0;
dests_node_malloced = 1;
}
dests_ch = (bitset *) (dests_node + SBC_MAX);
/* Initialize transiton table. */
- state->word_trtable = 0;
+ state->word_trtable = state->trtable = NULL;
/* At first, group all nodes belonging to `state' into several
destinations. */
@@ -3320,14 +3321,14 @@ build_trtable (dfa, state)
{
if (dests_node_malloced)
free (dests_node);
- /* Return NULL in case of an error, trtable otherwise. */
+ /* Return 0 in case of an error, 1 otherwise. */
if (ndests == 0)
{
state->trtable = (re_dfastate_t **)
- calloc (sizeof (re_dfastate_t *), SBC_MAX);;
- return state->trtable;
+ calloc (sizeof (re_dfastate_t *), SBC_MAX);
+ return 1;
}
- return NULL;
+ return 0;
}
err = re_node_set_alloc (&follows, ndests + 1);
@@ -3338,12 +3339,12 @@ build_trtable (dfa, state)
if (__libc_use_alloca ((sizeof (re_node_set) + sizeof (bitset)) * SBC_MAX
+ ndests * 3 * sizeof (re_dfastate_t *)))
dest_states = (re_dfastate_t **)
- alloca (ndests * 3 * sizeof (re_dfastate_t *));
+ alloca (ndests * 3 * sizeof (re_dfastate_t *));
else
#endif
{
dest_states = (re_dfastate_t **)
- malloc (ndests * 3 * sizeof (re_dfastate_t *));
+ malloc (ndests * 3 * sizeof (re_dfastate_t *));
if (BE (dest_states == NULL, 0))
{
out_free:
@@ -3354,7 +3355,7 @@ out_free:
re_node_set_free (dests_node + i);
if (dests_node_malloced)
free (dests_node);
- return NULL;
+ return 0;
}
dest_states_malloced = 1;
}
@@ -3390,9 +3391,8 @@ out_free:
if (BE (dest_states_word[i] == NULL && err != REG_NOERROR, 0))
goto out_free;
- if (dest_states[i] != dest_states_word[i]
- && dfa->mb_cur_max > 1)
- state->word_trtable = 1;
+ if (dest_states[i] != dest_states_word[i] && dfa->mb_cur_max > 1)
+ need_word_trtable = 1;
dest_states_nl[i] = re_acquire_state_context (&err, dfa, &follows,
CONTEXT_NEWLINE);
@@ -3407,13 +3407,14 @@ out_free:
bitset_merge (acceptable, dests_ch[i]);
}
- if (!BE (state->word_trtable, 0))
+ if (!BE (need_word_trtable, 0))
{
/* We don't care about whether the following character is a word
character, or we are in a single-byte character set so we can
discern by looking at the character code: allocate a
256-entry transition table. */
- trtable = (re_dfastate_t **) calloc (sizeof (re_dfastate_t *), SBC_MAX);
+ trtable = state->trtable =
+ (re_dfastate_t **) calloc (sizeof (re_dfastate_t *), SBC_MAX);
if (BE (trtable == NULL, 0))
goto out_free;
@@ -3443,8 +3444,8 @@ out_free:
by looking at the character code: build two 256-entry
transition tables, one starting at trtable[0] and one
starting at trtable[SBC_MAX]. */
- trtable = (re_dfastate_t **) calloc (sizeof (re_dfastate_t *),
- 2 * SBC_MAX);
+ trtable = state->word_trtable =
+ (re_dfastate_t **) calloc (sizeof (re_dfastate_t *), 2 * SBC_MAX);
if (BE (trtable == NULL, 0))
goto out_free;
@@ -3475,7 +3476,7 @@ out_free:
{
/* k-th destination accepts newline character. */
trtable[NEWLINE_CHAR] = dest_states_nl[j];
- if (state->word_trtable)
+ if (need_word_trtable)
trtable[NEWLINE_CHAR + SBC_MAX] = dest_states_nl[j];
/* There must be only one destination which accepts
newline. See group_nodes_into_DFAstates. */
@@ -3493,8 +3494,7 @@ out_free:
if (dests_node_malloced)
free (dests_node);
- state->trtable = trtable;
- return trtable;
+ return 1;
}
/* Group all nodes belonging to STATE into several destinations.
generated by cgit v1.1 at 2024-12-24 08:21:40 +0000