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posix: Sync regex with gnulib

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It sync with gnulib commit 6cfb4302b3e1da14d706198b693558290e9b00f4
and contains the fixes:

https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=32915b2a8a43825720755113bdffe9f67a591748
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=48f07576b8cd935b48e1050551f45ab1a79b9f01
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=5e407aba1f775d51b25481cb55f324c9868f62d7
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=4e02b30c761c76d04057fa5f6bba71401f9310cd
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=79f8ee4e389f8cb1339f8abed9a7d29816e2a2d4

Checked on x86_64-linux-gnu and i686-linux-gnu.
This commit is contained in:
Adhemerval Zanella
2019-11-04 16:47:11 -03:00
parent 4ecd584908
commit 2a0356e119
5 changed files with 49 additions and 114 deletions
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83
posix/regexec.c
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@ -443,7 +443,7 @@ re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
{
if (ret_len)
{
assert (pmatch[0].rm_so == start);
DEBUG_ASSERT (pmatch[0].rm_so == start);
rval = pmatch[0].rm_eo - start;
}
else
@ -502,9 +502,9 @@ re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, Idx nregs,
}
else
{
assert (regs_allocated == REGS_FIXED);
DEBUG_ASSERT (regs_allocated == REGS_FIXED);
/* This function may not be called with REGS_FIXED and nregs too big. */
assert (regs->num_regs >= nregs);
DEBUG_ASSERT (nregs <= regs->num_regs);
rval = REGS_FIXED;
}
@ -597,21 +597,12 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
Idx extra_nmatch;
bool sb;
int ch;
#if defined _LIBC || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
re_match_context_t mctx = { .dfa = dfa };
#else
re_match_context_t mctx;
#endif
char *fastmap = ((preg->fastmap != NULL && preg->fastmap_accurate
&& start != last_start && !preg->can_be_null)
? preg->fastmap : NULL);
RE_TRANSLATE_TYPE t = preg->translate;
#if !(defined _LIBC || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
memset (&mctx, '\0', sizeof (re_match_context_t));
mctx.dfa = dfa;
#endif
extra_nmatch = (nmatch > preg->re_nsub) ? nmatch - (preg->re_nsub + 1) : 0;
nmatch -= extra_nmatch;
@ -622,10 +613,8 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
|| dfa->init_state_begbuf == NULL))
return REG_NOMATCH;
#ifdef DEBUG
/* We assume front-end functions already check them. */
assert (0 <= last_start && last_start <= length);
#endif
DEBUG_ASSERT (0 <= last_start && last_start <= length);
/* If initial states with non-begbuf contexts have no elements,
the regex must be anchored. If preg->newline_anchor is set,
@ -677,8 +666,6 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
goto free_return;
}
}
else
mctx.state_log = NULL;
match_first = start;
mctx.input.tip_context = (eflags & REG_NOTBOL) ? CONTEXT_BEGBUF
@ -838,10 +825,8 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
match_ctx_clean (&mctx);
}
#ifdef DEBUG
assert (match_last != -1);
assert (err == REG_NOERROR);
#endif
DEBUG_ASSERT (match_last != -1);
DEBUG_ASSERT (err == REG_NOERROR);
/* Set pmatch[] if we need. */
if (nmatch > 0)
@ -886,7 +871,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
: mctx.input.offsets[pmatch[reg_idx].rm_eo]);
}
#else
assert (mctx.input.offsets_needed == 0);
DEBUG_ASSERT (mctx.input.offsets_needed == 0);
#endif
pmatch[reg_idx].rm_so += match_first;
pmatch[reg_idx].rm_eo += match_first;
@ -926,9 +911,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
re_dfastate_t **sifted_states;
re_dfastate_t **lim_states = NULL;
re_sift_context_t sctx;
#ifdef DEBUG
assert (mctx->state_log != NULL);
#endif
DEBUG_ASSERT (mctx->state_log != NULL);
match_last = mctx->match_last;
halt_node = mctx->last_node;
@ -1074,7 +1057,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
/* An initial state must not be NULL (invalid). */
if (__glibc_unlikely (cur_state == NULL))
{
assert (err == REG_ESPACE);
DEBUG_ASSERT (err == REG_ESPACE);
return -2;
}
@ -1129,7 +1112,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
err = extend_buffers (mctx, next_char_idx + 1);
if (__glibc_unlikely (err != REG_NOERROR))
{
assert (err == REG_ESPACE);
DEBUG_ASSERT (err == REG_ESPACE);
return -2;
}
}
@ -1212,9 +1195,7 @@ check_halt_state_context (const re_match_context_t *mctx,
{
Idx i;
unsigned int context;
#ifdef DEBUG
assert (state->halt);
#endif
DEBUG_ASSERT (state->halt);
context = re_string_context_at (&mctx->input, idx, mctx->eflags);
for (i = 0; i < state->nodes.nelem; ++i)
if (check_halt_node_context (mctx->dfa, state->nodes.elems[i], context))
@ -1362,7 +1343,7 @@ pop_fail_stack (struct re_fail_stack_t *fs, Idx *pidx, Idx nregs,
regmatch_t *regs, re_node_set *eps_via_nodes)
{
Idx num = --fs->num;
assert (num >= 0);
DEBUG_ASSERT (num >= 0);
*pidx = fs->stack[num].idx;
memcpy (regs, fs->stack[num].regs, sizeof (regmatch_t) * nregs);
re_node_set_free (eps_via_nodes);
@ -1389,10 +1370,8 @@ set_regs (const regex_t *preg, const re_match_context_t *mctx, size_t nmatch,
regmatch_t *prev_idx_match;
bool prev_idx_match_malloced = false;
#ifdef DEBUG
assert (nmatch > 1);
assert (mctx->state_log != NULL);
#endif
DEBUG_ASSERT (nmatch > 1);
DEBUG_ASSERT (mctx->state_log != NULL);
if (fl_backtrack)
{
fs = &fs_body;
@ -1578,9 +1557,7 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
Idx str_idx = sctx->last_str_idx;
re_node_set cur_dest;
#ifdef DEBUG
assert (mctx->state_log != NULL && mctx->state_log[str_idx] != NULL);
#endif
DEBUG_ASSERT (mctx->state_log != NULL && mctx->state_log[str_idx] != NULL);
/* Build sifted state_log[str_idx]. It has the nodes which can epsilon
transit to the last_node and the last_node itself. */
@ -1648,11 +1625,8 @@ build_sifted_states (const re_match_context_t *mctx, re_sift_context_t *sctx,
Idx prev_node = cur_src->elems[i];
int naccepted = 0;
bool ok;
DEBUG_ASSERT (!IS_EPSILON_NODE (dfa->nodes[prev_node].type));
#ifdef DEBUG
re_token_type_t type = dfa->nodes[prev_node].type;
assert (!IS_EPSILON_NODE (type));
#endif
#ifdef RE_ENABLE_I18N
/* If the node may accept "multi byte". */
if (dfa->nodes[prev_node].accept_mb)
@ -2505,9 +2479,7 @@ transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
err = clean_state_log_if_needed (mctx, dest_idx);
if (__glibc_unlikely (err != REG_NOERROR))
return err;
#ifdef DEBUG
assert (dfa->nexts[cur_node_idx] != -1);
#endif
DEBUG_ASSERT (dfa->nexts[cur_node_idx] != -1);
new_nodes = dfa->eclosures + dfa->nexts[cur_node_idx];
dest_state = mctx->state_log[dest_idx];
@ -2571,9 +2543,7 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
/* And add the epsilon closures (which is 'new_dest_nodes') of
the backreference to appropriate state_log. */
#ifdef DEBUG
assert (dfa->nexts[node_idx] != -1);
#endif
DEBUG_ASSERT (dfa->nexts[node_idx] != -1);
for (; bkc_idx < mctx->nbkref_ents; ++bkc_idx)
{
Idx subexp_len;
@ -3032,10 +3002,8 @@ check_arrival_add_next_nodes (re_match_context_t *mctx, Idx str_idx,
{
int naccepted = 0;
Idx cur_node = cur_nodes->elems[cur_idx];
#ifdef DEBUG
re_token_type_t type = dfa->nodes[cur_node].type;
assert (!IS_EPSILON_NODE (type));
#endif
DEBUG_ASSERT (!IS_EPSILON_NODE (dfa->nodes[cur_node].type));
#ifdef RE_ENABLE_I18N
/* If the node may accept "multi byte". */
if (dfa->nodes[cur_node].accept_mb)
@ -3103,9 +3071,7 @@ check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
reg_errcode_t err;
Idx idx, outside_node;
re_node_set new_nodes;
#ifdef DEBUG
assert (cur_nodes->nelem);
#endif
DEBUG_ASSERT (cur_nodes->nelem);
err = re_node_set_alloc (&new_nodes, cur_nodes->nelem);
if (__glibc_unlikely (err != REG_NOERROR))
return err;
@ -3695,6 +3661,7 @@ group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
bitset_empty (accepts);
}
}
assume (ndests <= SBC_MAX);
return ndests;
error_return:
for (j = 0; j < ndests; ++j)
@ -4272,10 +4239,8 @@ static reg_errcode_t
__attribute_warn_unused_result__
match_ctx_add_subtop (re_match_context_t *mctx, Idx node, Idx str_idx)
{
#ifdef DEBUG
assert (mctx->sub_tops != NULL);
assert (mctx->asub_tops > 0);
#endif
DEBUG_ASSERT (mctx->sub_tops != NULL);
DEBUG_ASSERT (mctx->asub_tops > 0);
if (__glibc_unlikely (mctx->nsub_tops == mctx->asub_tops))
{
Idx new_asub_tops = mctx->asub_tops * 2;