/* -*- buffer-read-only: t -*- vi: set ro: */
/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
/* Extended regular expression matching and search library.
- Copyright (C) 2002-2011 Free Software Foundation, Inc.
+ Copyright (C) 2002-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
static reg_errcode_t match_ctx_init (re_match_context_t *cache, int eflags,
Idx n) internal_function;
regoff_t range, Idx stop,
struct re_registers *regs,
bool ret_len) internal_function;
-static unsigned int re_copy_regs (struct re_registers *regs, regmatch_t *pmatch,
- Idx nregs, int regs_allocated)
- internal_function;
+static unsigned re_copy_regs (struct re_registers *regs, regmatch_t *pmatch,
+ Idx nregs, int regs_allocated) internal_function;
static reg_errcode_t prune_impossible_nodes (re_match_context_t *mctx)
internal_function;
static Idx check_matching (re_match_context_t *mctx, bool fl_longest_match,
static bool check_node_accept (const re_match_context_t *mctx,
const re_token_t *node, Idx idx)
internal_function;
-static reg_errcode_t extend_buffers (re_match_context_t *mctx)
+static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len)
internal_function;
\f
/* Entry point for POSIX code. */
string STRING.
If NMATCH is zero or REG_NOSUB was set in the cflags argument to
- `regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at
+ 'regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at
least NMATCH elements, and we set them to the offsets of the
corresponding matched substrings.
- EFLAGS specifies `execution flags' which affect matching: if
+ EFLAGS specifies "execution flags" which affect matching: if
REG_NOTBOL is set, then ^ does not match at the beginning of the
string; if REG_NOTEOL is set, then $ does not match at the end.
{
reg_errcode_t err;
Idx start, length;
-#ifdef _LIBC
- re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
-#endif
+ re_dfa_t *dfa = preg->buffer;
if (eflags & ~(REG_NOTBOL | REG_NOTEOL | REG_STARTEND))
return REG_BADPAT;
length = strlen (string);
}
- __libc_lock_lock (dfa->lock);
+ lock_lock (dfa->lock);
if (preg->no_sub)
err = re_search_internal (preg, string, length, start, length,
length, 0, NULL, eflags);
else
err = re_search_internal (preg, string, length, start, length,
length, nmatch, pmatch, eflags);
- __libc_lock_unlock (dfa->lock);
+ lock_unlock (dfa->lock);
return err != REG_NOERROR;
}
#endif
static regoff_t
-internal_function
re_search_2_stub (struct re_pattern_buffer *bufp,
const char *string1, Idx length1,
const char *string2, Idx length2,
otherwise the position of the match is returned. */
static regoff_t
-internal_function
re_search_stub (struct re_pattern_buffer *bufp,
const char *string, Idx length,
Idx start, regoff_t range, Idx stop, struct re_registers *regs,
Idx nregs;
regoff_t rval;
int eflags = 0;
-#ifdef _LIBC
- re_dfa_t *dfa = (re_dfa_t *) bufp->buffer;
-#endif
+ re_dfa_t *dfa = bufp->buffer;
Idx last_start = start + range;
/* Check for out-of-range. */
else if (BE (last_start < 0 || (range < 0 && start <= last_start), 0))
last_start = 0;
- __libc_lock_lock (dfa->lock);
+ lock_lock (dfa->lock);
eflags |= (bufp->not_bol) ? REG_NOTBOL : 0;
eflags |= (bufp->not_eol) ? REG_NOTEOL : 0;
rval = 0;
- /* I hope we needn't fill ther regs with -1's when no match was found. */
+ /* I hope we needn't fill their regs with -1's when no match was found. */
if (result != REG_NOERROR)
- rval = -1;
+ rval = result == REG_NOMATCH ? -1 : -2;
else if (regs != NULL)
{
/* If caller wants register contents data back, copy them. */
}
re_free (pmatch);
out:
- __libc_lock_unlock (dfa->lock);
+ lock_unlock (dfa->lock);
return rval;
}
-static unsigned int
-internal_function
+static unsigned
re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, Idx nregs,
int regs_allocated)
{
int rval = REGS_REALLOCATE;
Idx i;
Idx need_regs = nregs + 1;
- /* We need one extra element beyond `num_regs' for the `-1' marker GNU code
+ /* We need one extra element beyond 'num_regs' for the '-1' marker GNU code
uses. */
/* Have the register data arrays been allocated? */
(0 <= LAST_START && LAST_START <= LENGTH) */
static reg_errcode_t
-internal_function __attribute_warn_unused_result__
+__attribute_warn_unused_result__
re_search_internal (const regex_t *preg,
const char *string, Idx length,
Idx start, Idx last_start, Idx stop,
int eflags)
{
reg_errcode_t err;
- const re_dfa_t *dfa = (const re_dfa_t *) preg->buffer;
+ const re_dfa_t *dfa = preg->buffer;
Idx left_lim, right_lim;
int incr;
bool fl_longest_match;
if (nmatch > 1 || dfa->has_mb_node)
{
/* Avoid overflow. */
- if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= mctx.input.bufs_len, 0))
+ if (BE ((MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
+ <= mctx.input.bufs_len), 0))
{
err = REG_ESPACE;
goto free_return;
mctx.input.tip_context = (eflags & REG_NOTBOL) ? CONTEXT_BEGBUF
: CONTEXT_NEWLINE | CONTEXT_BEGBUF;
- /* Check incrementally whether of not the input string match. */
+ /* Check incrementally whether the input string matches. */
incr = (last_start < start) ? -1 : 1;
left_lim = (last_start < start) ? last_start : start;
right_lim = (last_start < start) ? start : last_start;
goto free_return;
}
- /* At last, add the offset to the each registers, since we slided
+ /* At last, add the offset to each register, since we slid
the buffers so that we could assume that the matching starts
from 0. */
for (reg_idx = 0; reg_idx < nmatch; ++reg_idx)
}
static reg_errcode_t
-internal_function __attribute_warn_unused_result__
+__attribute_warn_unused_result__
prune_impossible_nodes (re_match_context_t *mctx)
{
const re_dfa_t *const dfa = mctx->dfa;
halt_node = mctx->last_node;
/* Avoid overflow. */
- if (BE (SIZE_MAX / sizeof (re_dfastate_t *) <= match_last, 0))
+ if (BE (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) <= match_last, 0))
return REG_ESPACE;
sifted_states = re_malloc (re_dfastate_t *, match_last + 1);
since initial states may have constraints like "\<", "^", etc.. */
static inline re_dfastate_t *
-__attribute ((always_inline)) internal_function
+__attribute__ ((always_inline)) internal_function
acquire_init_state_context (reg_errcode_t *err, const re_match_context_t *mctx,
Idx idx)
{
FL_LONGEST_MATCH means we want the POSIX longest matching.
If P_MATCH_FIRST is not NULL, and the match fails, it is set to the
next place where we may want to try matching.
- Note that the matcher assume that the maching starts from the current
+ Note that the matcher assumes that the matching starts from the current
index of the buffer. */
static Idx
re_dfastate_t *old_state = cur_state;
Idx next_char_idx = re_string_cur_idx (&mctx->input) + 1;
- if (BE (next_char_idx >= mctx->input.bufs_len, 0)
+ if ((BE (next_char_idx >= mctx->input.bufs_len, 0)
+ && mctx->input.bufs_len < mctx->input.len)
|| (BE (next_char_idx >= mctx->input.valid_len, 0)
&& mctx->input.valid_len < mctx->input.len))
{
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, next_char_idx + 1);
if (BE (err != REG_NOERROR, 0))
{
assert (err == REG_ESPACE);
set_regs (const regex_t *preg, const re_match_context_t *mctx, size_t nmatch,
regmatch_t *pmatch, bool fl_backtrack)
{
- const re_dfa_t *dfa = (const re_dfa_t *) preg->buffer;
+ const re_dfa_t *dfa = preg->buffer;
Idx idx, cur_node;
re_node_set eps_via_nodes;
struct re_fail_stack_t *fs;
and sift the nodes in each states according to the following rules.
Updated state_log will be wrote to STATE_LOG.
- Rules: We throw away the Node `a' in the STATE_LOG[STR_IDX] if...
+ Rules: We throw away the Node 'a' in the STATE_LOG[STR_IDX] if...
1. When STR_IDX == MATCH_LAST(the last index in the state_log):
- If `a' isn't the LAST_NODE and `a' can't epsilon transit to
- the LAST_NODE, we throw away the node `a'.
- 2. When 0 <= STR_IDX < MATCH_LAST and `a' accepts
- string `s' and transit to `b':
+ If 'a' isn't the LAST_NODE and 'a' can't epsilon transit to
+ the LAST_NODE, we throw away the node 'a'.
+ 2. When 0 <= STR_IDX < MATCH_LAST and 'a' accepts
+ string 's' and transit to 'b':
i. If 'b' isn't in the STATE_LOG[STR_IDX+strlen('s')], we throw
- away the node `a'.
+ away the node 'a'.
ii. If 'b' is in the STATE_LOG[STR_IDX+strlen('s')] but 'b' is
- thrown away, we throw away the node `a'.
+ thrown away, we throw away the node 'a'.
3. When 0 <= STR_IDX < MATCH_LAST and 'a' epsilon transit to 'b':
i. If 'b' isn't in the STATE_LOG[STR_IDX], we throw away the
- node `a'.
+ node 'a'.
ii. If 'b' is in the STATE_LOG[STR_IDX] but 'b' is thrown away,
- we throw away the node `a'. */
+ we throw away the node 'a'. */
#define STATE_NODE_CONTAINS(state,node) \
((state) != NULL && re_node_set_contains (&(state)->nodes, node))
Idx i;
/* Then build the next sifted state.
- We build the next sifted state on `cur_dest', and update
- `sifted_states[str_idx]' with `cur_dest'.
+ We build the next sifted state on 'cur_dest', and update
+ 'sifted_states[str_idx]' with 'cur_dest'.
Note:
- `cur_dest' is the sifted state from `state_log[str_idx + 1]'.
- `cur_src' points the node_set of the old `state_log[str_idx]'
+ 'cur_dest' is the sifted state from 'state_log[str_idx + 1]'.
+ 'cur_src' points the node_set of the old 'state_log[str_idx]'
(with the epsilon nodes pre-filtered out). */
for (i = 0; i < cur_src->nelem; i++)
{
assert (!IS_EPSILON_NODE (type));
#endif
#ifdef RE_ENABLE_I18N
- /* If the node may accept `multi byte'. */
+ /* If the node may accept "multi byte". */
if (dfa->nodes[prev_node].accept_mb)
naccepted = sift_states_iter_mb (mctx, sctx, prev_node,
str_idx, sctx->last_str_idx);
{
Idx top = mctx->state_log_top;
- if (next_state_log_idx >= mctx->input.bufs_len
+ if ((next_state_log_idx >= mctx->input.bufs_len
+ && mctx->input.bufs_len < mctx->input.len)
|| (next_state_log_idx >= mctx->input.valid_len
&& mctx->input.valid_len < mctx->input.len))
{
reg_errcode_t err;
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, next_state_log_idx + 1);
if (BE (err != REG_NOERROR, 0))
return err;
}
{
const re_dfa_t *const dfa = mctx->dfa;
int naccepted;
- /* Check the node can accept `multi byte'. */
+ /* Check the node can accept "multi byte". */
naccepted = check_node_accept_bytes (dfa, node_idx, &mctx->input, str_idx);
if (naccepted > 0 && str_idx + naccepted <= max_str_idx &&
!STATE_NODE_CONTAINS (sctx->sifted_states[str_idx + naccepted],
dfa->nexts[node_idx]))
- /* The node can't accept the `multi byte', or the
+ /* The node can't accept the "multi byte", or the
destination was already thrown away, then the node
- could't accept the current input `multi byte'. */
+ could't accept the current input "multi byte". */
naccepted = 0;
/* Otherwise, it is sure that the node could accept
- `naccepted' bytes input. */
+ 'naccepted' bytes input. */
return naccepted;
}
#endif /* RE_ENABLE_I18N */
/* From the node set CUR_NODES, pick up the nodes whose types are
OP_OPEN_SUBEXP and which have corresponding back references in the regular
expression. And register them to use them later for evaluating the
- correspoding back references. */
+ corresponding back references. */
static reg_errcode_t
internal_function
if (naccepted == 0)
continue;
- /* The node can accepts `naccepted' bytes. */
+ /* The node can accepts 'naccepted' bytes. */
dest_idx = re_string_cur_idx (&mctx->input) + naccepted;
mctx->max_mb_elem_len = ((mctx->max_mb_elem_len < naccepted) ? naccepted
: mctx->max_mb_elem_len);
const re_token_t *node = dfa->nodes + node_idx;
re_node_set *new_dest_nodes;
- /* Check whether `node' is a backreference or not. */
+ /* Check whether 'node' is a backreference or not. */
if (node->type != OP_BACK_REF)
continue;
continue;
}
- /* `node' is a backreference.
+ /* 'node' is a backreference.
Check the substring which the substring matched. */
bkc_idx = mctx->nbkref_ents;
err = get_subexp (mctx, node_idx, cur_str_idx);
if (BE (err != REG_NOERROR, 0))
goto free_return;
- /* And add the epsilon closures (which is `new_dest_nodes') of
+ /* And add the epsilon closures (which is 'new_dest_nodes') of
the backreference to appropriate state_log. */
#ifdef DEBUG
assert (dfa->nexts[node_idx] != REG_MISSING);
dest_state = mctx->state_log[dest_str_idx];
prev_nelem = ((mctx->state_log[cur_str_idx] == NULL) ? 0
: mctx->state_log[cur_str_idx]->nodes.nelem);
- /* Add `new_dest_node' to state_log. */
+ /* Add 'new_dest_node' to state_log. */
if (dest_state == NULL)
{
mctx->state_log[dest_str_idx]
if (bkref_str_off >= mctx->input.len)
break;
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, bkref_str_off + 1);
if (BE (err != REG_NOERROR, 0))
return err;
{
re_dfastate_t **new_array;
Idx old_alloc = path->alloc;
- Idx new_alloc = old_alloc + last_str + mctx->max_mb_elem_len + 1;
- if (BE (new_alloc < old_alloc, 0)
- || BE (SIZE_MAX / sizeof (re_dfastate_t *) < new_alloc, 0))
+ Idx incr_alloc = last_str + mctx->max_mb_elem_len + 1;
+ Idx new_alloc;
+ if (BE (IDX_MAX - old_alloc < incr_alloc, 0))
+ return REG_ESPACE;
+ new_alloc = old_alloc + incr_alloc;
+ if (BE (SIZE_MAX / sizeof (re_dfastate_t *) < new_alloc, 0))
return REG_ESPACE;
new_array = re_realloc (path->array, re_dfastate_t *, new_alloc);
if (BE (new_array == NULL, 0))
assert (!IS_EPSILON_NODE (type));
#endif
#ifdef RE_ENABLE_I18N
- /* If the node may accept `multi byte'. */
+ /* If the node may accept "multi byte". */
if (dfa->nodes[cur_node].accept_mb)
{
naccepted = check_node_accept_bytes (dfa, cur_node, &mctx->input,
bitset_word_t elem, mask;
bool dests_node_malloced = false;
bool dest_states_malloced = false;
- Idx ndests; /* Number of the destination states from `state'. */
+ Idx ndests; /* Number of the destination states from 'state'. */
re_dfastate_t **trtable;
re_dfastate_t **dest_states = NULL, **dest_states_word, **dest_states_nl;
re_node_set follows, *dests_node;
} *dests_alloc;
/* We build DFA states which corresponds to the destination nodes
- from `state'. `dests_node[i]' represents the nodes which i-th
- destination state contains, and `dests_ch[i]' represents the
+ from 'state'. 'dests_node[i]' represents the nodes which i-th
+ destination state contains, and 'dests_ch[i]' represents the
characters which i-th destination state accepts. */
if (__libc_use_alloca (sizeof (struct dests_alloc)))
dests_alloc = (struct dests_alloc *) alloca (sizeof (struct dests_alloc));
dests_node = dests_alloc->dests_node;
dests_ch = dests_alloc->dests_ch;
- /* Initialize transiton table. */
+ /* Initialize transition table. */
state->word_trtable = state->trtable = NULL;
- /* At first, group all nodes belonging to `state' into several
+ /* At first, group all nodes belonging to 'state' into several
destinations. */
ndests = group_nodes_into_DFAstates (dfa, state, dests_node, dests_ch);
if (BE (! REG_VALID_NONZERO_INDEX (ndests), 0))
{
if (dests_node_malloced)
free (dests_alloc);
+ /* Return false in case of an error, true otherwise. */
if (ndests == 0)
{
state->trtable = (re_dfastate_t **)
reg_errcode_t err;
bool ok;
Idx i, j, k;
- Idx ndests; /* Number of the destinations from `state'. */
+ Idx ndests; /* Number of the destinations from 'state'. */
bitset_t accepts; /* Characters a node can accept. */
const re_node_set *cur_nodes = &state->nodes;
bitset_empty (accepts);
ndests = 0;
- /* For all the nodes belonging to `state', */
+ /* For all the nodes belonging to 'state', */
for (i = 0; i < cur_nodes->nelem; ++i)
{
re_token_t *node = &dfa->nodes[cur_nodes->elems[i]];
else
continue;
- /* Check the `accepts' and sift the characters which are not
+ /* Check the 'accepts' and sift the characters which are not
match it the context. */
if (constraint)
{
}
}
- /* Then divide `accepts' into DFA states, or create a new
+ /* Then divide 'accepts' into DFA states, or create a new
state. Above, we make sure that accepts is not empty. */
for (j = 0; j < ndests; ++j)
{
if (type == CHARACTER && !bitset_contain (dests_ch[j], node->opr.c))
continue;
- /* Enumerate the intersection set of this state and `accepts'. */
+ /* Enumerate the intersection set of this state and 'accepts'. */
has_intersec = 0;
for (k = 0; k < BITSET_WORDS; ++k)
has_intersec |= intersec[k] = accepts[k] & dests_ch[j][k];
if (!has_intersec)
continue;
- /* Then check if this state is a subset of `accepts'. */
+ /* Then check if this state is a subset of 'accepts'. */
not_subset = not_consumed = 0;
for (k = 0; k < BITSET_WORDS; ++k)
{
not_consumed |= accepts[k] = accepts[k] & ~dests_ch[j][k];
}
- /* If this state isn't a subset of `accepts', create a
- new group state, which has the `remains'. */
+ /* If this state isn't a subset of 'accepts', create a
+ new group state, which has the 'remains'. */
if (not_subset)
{
bitset_copy (dests_ch[ndests], remains);
}
#ifdef RE_ENABLE_I18N
-/* Check how many bytes the node `dfa->nodes[node_idx]' accepts.
+/* Check how many bytes the node 'dfa->nodes[node_idx]' accepts.
Return the number of the bytes the node accepts.
STR_IDX is the current index of the input string.
const int32_t *table, *indirect;
const unsigned char *weights, *extra;
const char *collseqwc;
- int32_t idx;
/* This #include defines a local function! */
# include <locale/weight.h>
in_collseq = find_collation_sequence_value (pin, elem_len);
}
/* match with range expression? */
+ /* FIXME: Implement rational ranges here, too. */
for (i = 0; i < cset->nranges; ++i)
if (cset->range_starts[i] <= in_collseq
&& in_collseq <= cset->range_ends[i])
_NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
indirect = (const int32_t *)
_NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
- int32_t idx = findidx (&cp);
+ int32_t idx = findidx (&cp, elem_len);
if (idx > 0)
for (i = 0; i < cset->nequiv_classes; ++i)
{
# endif /* _LIBC */
{
/* match with range expression? */
-#if __GNUC__ >= 2 && ! (__STDC_VERSION__ < 199901L && __STRICT_ANSI__)
- wchar_t cmp_buf[] = {L'\0', L'\0', wc, L'\0', L'\0', L'\0'};
-#else
- wchar_t cmp_buf[] = {L'\0', L'\0', L'\0', L'\0', L'\0', L'\0'};
- cmp_buf[2] = wc;
-#endif
for (i = 0; i < cset->nranges; ++i)
{
- cmp_buf[0] = cset->range_starts[i];
- cmp_buf[4] = cset->range_ends[i];
- if (wcscoll (cmp_buf, cmp_buf + 2) <= 0
- && wcscoll (cmp_buf + 2, cmp_buf + 4) <= 0)
+ if (cset->range_starts[i] <= wc && wc <= cset->range_ends[i])
{
match_len = char_len;
goto check_node_accept_bytes_match;
/* Skip the collation sequence value. */
idx += sizeof (uint32_t);
/* Skip the wide char sequence of the collating element. */
- idx = idx + sizeof (uint32_t) * (extra[idx] + 1);
+ idx = idx + sizeof (uint32_t) * (*(int32_t *) (extra + idx) + 1);
/* If we found the entry, return the sequence value. */
if (found)
return *(uint32_t *) (extra + idx);
static reg_errcode_t
internal_function __attribute_warn_unused_result__
-extend_buffers (re_match_context_t *mctx)
+extend_buffers (re_match_context_t *mctx, int min_len)
{
reg_errcode_t ret;
re_string_t *pstr = &mctx->input;
/* Avoid overflow. */
- if (BE (SIZE_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
+ if (BE (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) / 2
+ <= pstr->bufs_len, 0))
return REG_ESPACE;
- /* Double the lengthes of the buffers. */
- ret = re_string_realloc_buffers (pstr, pstr->bufs_len * 2);
+ /* Double the lengths of the buffers, but allocate at least MIN_LEN. */
+ ret = re_string_realloc_buffers (pstr,
+ MAX (min_len,
+ MIN (pstr->len, pstr->bufs_len * 2)));
if (BE (ret != REG_NOERROR, 0))
return ret;
size_t max_object_size =
MAX (sizeof (struct re_backref_cache_entry),
sizeof (re_sub_match_top_t *));
- if (BE (SIZE_MAX / max_object_size < n, 0))
+ if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < n, 0))
return REG_ESPACE;
mctx->bkref_ents = re_malloc (struct re_backref_cache_entry, n);
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