/* Extended regular expression matching and search library.
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002-2014 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 2, 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser 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 Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
-static void re_string_construct_common (const char *str, int len,
+static void re_string_construct_common (const char *str, Idx len,
re_string_t *pstr,
- REG_TRANSLATE_TYPE trans, int icase,
+ RE_TRANSLATE_TYPE trans, bool icase,
const re_dfa_t *dfa) internal_function;
-static re_dfastate_t *create_ci_newstate (re_dfa_t *dfa,
+static re_dfastate_t *create_ci_newstate (const re_dfa_t *dfa,
const re_node_set *nodes,
- unsigned int hash) internal_function;
-static re_dfastate_t *create_cd_newstate (re_dfa_t *dfa,
+ re_hashval_t hash) internal_function;
+static re_dfastate_t *create_cd_newstate (const re_dfa_t *dfa,
const re_node_set *nodes,
unsigned int context,
- unsigned int hash) internal_function;
+ re_hashval_t hash) internal_function;
\f
/* Functions for string operation. */
re_string_reconstruct before using the object. */
static reg_errcode_t
-internal_function
-re_string_allocate (re_string_t *pstr, const char *str, int len, int init_len,
- REG_TRANSLATE_TYPE trans, int icase, const re_dfa_t *dfa)
+internal_function __attribute_warn_unused_result__
+re_string_allocate (re_string_t *pstr, const char *str, Idx len, Idx init_len,
+ RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
{
reg_errcode_t ret;
- int init_buf_len;
+ Idx init_buf_len;
/* Ensure at least one character fits into the buffers. */
if (init_len < dfa->mb_cur_max)
/* This function allocate the buffers, and initialize them. */
static reg_errcode_t
-internal_function
-re_string_construct (re_string_t *pstr, const char *str, int len,
- REG_TRANSLATE_TYPE trans, int icase, const re_dfa_t *dfa)
+internal_function __attribute_warn_unused_result__
+re_string_construct (re_string_t *pstr, const char *str, Idx len,
+ RE_TRANSLATE_TYPE trans, bool icase, const re_dfa_t *dfa)
{
reg_errcode_t ret;
memset (pstr, '\0', sizeof (re_string_t));
/* Helper functions for re_string_allocate, and re_string_construct. */
static reg_errcode_t
-internal_function
-re_string_realloc_buffers (re_string_t *pstr, int new_buf_len)
+internal_function __attribute_warn_unused_result__
+re_string_realloc_buffers (re_string_t *pstr, Idx new_buf_len)
{
#ifdef RE_ENABLE_I18N
if (pstr->mb_cur_max > 1)
{
- wint_t *new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
+ wint_t *new_wcs;
+
+ /* Avoid overflow in realloc. */
+ const size_t max_object_size = MAX (sizeof (wint_t), sizeof (Idx));
+ if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < new_buf_len, 0))
+ return REG_ESPACE;
+
+ new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
if (BE (new_wcs == NULL, 0))
return REG_ESPACE;
pstr->wcs = new_wcs;
if (pstr->offsets != NULL)
{
- int *new_offsets = re_realloc (pstr->offsets, int, new_buf_len);
+ Idx *new_offsets = re_realloc (pstr->offsets, Idx, new_buf_len);
if (BE (new_offsets == NULL, 0))
return REG_ESPACE;
pstr->offsets = new_offsets;
static void
internal_function
-re_string_construct_common (const char *str, int len, re_string_t *pstr,
- REG_TRANSLATE_TYPE trans, int icase,
+re_string_construct_common (const char *str, Idx len, re_string_t *pstr,
+ RE_TRANSLATE_TYPE trans, bool icase,
const re_dfa_t *dfa)
{
pstr->raw_mbs = (const unsigned char *) str;
pstr->len = len;
pstr->raw_len = len;
- pstr->trans = (unsigned REG_TRANSLATE_TYPE) trans;
- pstr->icase = icase ? 1 : 0;
+ pstr->trans = trans;
+ pstr->icase = icase;
pstr->mbs_allocated = (trans != NULL || icase);
pstr->mb_cur_max = dfa->mb_cur_max;
pstr->is_utf8 = dfa->is_utf8;
unsigned char buf[64];
#endif
mbstate_t prev_st;
- int byte_idx, end_idx, remain_len;
+ Idx byte_idx, end_idx, remain_len;
size_t mbclen;
/* Build the buffers from pstr->valid_len to either pstr->len or
}
else
p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx;
- mbclen = mbrtowc (&wc, p, remain_len, &pstr->cur_state);
- if (BE (mbclen == (size_t) -2, 0))
- {
- /* The buffer doesn't have enough space, finish to build. */
- pstr->cur_state = prev_st;
- break;
- }
- else if (BE (mbclen == (size_t) -1 || mbclen == 0, 0))
+ mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
+ if (BE (mbclen == (size_t) -1 || mbclen == 0
+ || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len), 0))
{
/* We treat these cases as a singlebyte character. */
mbclen = 1;
wc = pstr->trans[wc];
pstr->cur_state = prev_st;
}
+ else if (BE (mbclen == (size_t) -2, 0))
+ {
+ /* The buffer doesn't have enough space, finish to build. */
+ pstr->cur_state = prev_st;
+ break;
+ }
/* Write wide character and padding. */
pstr->wcs[byte_idx++] = wc;
/* Build wide character buffer PSTR->WCS like build_wcs_buffer,
but for REG_ICASE. */
-static int
-internal_function
+static reg_errcode_t
+internal_function __attribute_warn_unused_result__
build_wcs_upper_buffer (re_string_t *pstr)
{
mbstate_t prev_st;
- int src_idx, byte_idx, end_idx, remain_len;
+ Idx src_idx, byte_idx, end_idx, remain_len;
size_t mbclen;
#ifdef _LIBC
char buf[MB_LEN_MAX];
remain_len = end_idx - byte_idx;
prev_st = pstr->cur_state;
- mbclen = mbrtowc (&wc,
- ((const char *) pstr->raw_mbs + pstr->raw_mbs_idx
- + byte_idx), remain_len, &pstr->cur_state);
- if (BE (mbclen + 2 > 2, 1))
+ mbclen = __mbrtowc (&wc,
+ ((const char *) pstr->raw_mbs + pstr->raw_mbs_idx
+ + byte_idx), remain_len, &pstr->cur_state);
+ if (BE (mbclen < (size_t) -2, 1))
{
wchar_t wcu = wc;
if (iswlower (wc))
for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
pstr->wcs[byte_idx++] = WEOF;
}
- else if (mbclen == (size_t) -1 || mbclen == 0)
+ else if (mbclen == (size_t) -1 || mbclen == 0
+ || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len))
{
- /* It is an invalid character or '\0'. Just use the byte. */
+ /* It is an invalid character, an incomplete character
+ at the end of the string, or '\0'. Just use the byte. */
int ch = pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
pstr->mbs[byte_idx] = ch;
/* And also cast it to wide char. */
}
else
p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + src_idx;
- mbclen = mbrtowc (&wc, p, remain_len, &pstr->cur_state);
- if (BE (mbclen + 2 > 2, 1))
+ mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
+ if (BE (mbclen < (size_t) -2, 1))
{
wchar_t wcu = wc;
if (iswlower (wc))
if (pstr->offsets == NULL)
{
- pstr->offsets = re_malloc (int, pstr->bufs_len);
+ pstr->offsets = re_malloc (Idx, pstr->bufs_len);
if (pstr->offsets == NULL)
return REG_ESPACE;
src_idx += mbclen;
continue;
}
- else
- memcpy (pstr->mbs + byte_idx, p, mbclen);
+ else
+ memcpy (pstr->mbs + byte_idx, p, mbclen);
}
else
memcpy (pstr->mbs + byte_idx, p, mbclen);
for (remain_len = byte_idx + mbclen - 1; byte_idx < remain_len ;)
pstr->wcs[byte_idx++] = WEOF;
}
- else if (mbclen == (size_t) -1 || mbclen == 0)
+ else if (mbclen == (size_t) -1 || mbclen == 0
+ || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len))
{
/* It is an invalid character or '\0'. Just use the byte. */
int ch = pstr->raw_mbs[pstr->raw_mbs_idx + src_idx];
/* Skip characters until the index becomes greater than NEW_RAW_IDX.
Return the index. */
-static int
+static Idx
internal_function
-re_string_skip_chars (re_string_t *pstr, int new_raw_idx, wint_t *last_wc)
+re_string_skip_chars (re_string_t *pstr, Idx new_raw_idx, wint_t *last_wc)
{
mbstate_t prev_st;
- int rawbuf_idx;
+ Idx rawbuf_idx;
size_t mbclen;
- wchar_t wc = 0;
+ wint_t wc = WEOF;
/* Skip the characters which are not necessary to check. */
for (rawbuf_idx = pstr->raw_mbs_idx + pstr->valid_raw_len;
rawbuf_idx < new_raw_idx;)
{
- int remain_len;
- remain_len = pstr->len - rawbuf_idx;
+ wchar_t wc2;
+ Idx remain_len = pstr->raw_len - rawbuf_idx;
prev_st = pstr->cur_state;
- mbclen = mbrtowc (&wc, (const char *) pstr->raw_mbs + rawbuf_idx,
- remain_len, &pstr->cur_state);
+ mbclen = __mbrtowc (&wc2, (const char *) pstr->raw_mbs + rawbuf_idx,
+ remain_len, &pstr->cur_state);
if (BE (mbclen == (size_t) -2 || mbclen == (size_t) -1 || mbclen == 0, 0))
{
- /* We treat these cases as a singlebyte character. */
+ /* We treat these cases as a single byte character. */
+ if (mbclen == 0 || remain_len == 0)
+ wc = L'\0';
+ else
+ wc = *(unsigned char *) (pstr->raw_mbs + rawbuf_idx);
mbclen = 1;
pstr->cur_state = prev_st;
}
+ else
+ wc = wc2;
/* Then proceed the next character. */
rawbuf_idx += mbclen;
}
- *last_wc = (wint_t) wc;
+ *last_wc = wc;
return rawbuf_idx;
}
#endif /* RE_ENABLE_I18N */
internal_function
build_upper_buffer (re_string_t *pstr)
{
- int char_idx, end_idx;
+ Idx char_idx, end_idx;
end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
for (char_idx = pstr->valid_len; char_idx < end_idx; ++char_idx)
internal_function
re_string_translate_buffer (re_string_t *pstr)
{
- int buf_idx, end_idx;
+ Idx buf_idx, end_idx;
end_idx = (pstr->bufs_len > pstr->len) ? pstr->len : pstr->bufs_len;
for (buf_idx = pstr->valid_len; buf_idx < end_idx; ++buf_idx)
convert to upper case in case of REG_ICASE, apply translation. */
static reg_errcode_t
-internal_function
-re_string_reconstruct (re_string_t *pstr, int idx, int eflags)
+internal_function __attribute_warn_unused_result__
+re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
{
- int offset = idx - pstr->raw_mbs_idx;
- if (BE (offset < 0, 0))
+ Idx offset;
+
+ if (BE (pstr->raw_mbs_idx <= idx, 0))
+ offset = idx - pstr->raw_mbs_idx;
+ else
{
/* Reset buffer. */
#ifdef RE_ENABLE_I18N
if (BE (offset != 0, 1))
{
- /* Are the characters which are already checked remain? */
- if (BE (offset < pstr->valid_raw_len, 1)
-#ifdef RE_ENABLE_I18N
- /* Handling this would enlarge the code too much.
- Accept a slowdown in that case. */
- && pstr->offsets_needed == 0
-#endif
- )
+ /* Should the already checked characters be kept? */
+ if (BE (offset < pstr->valid_raw_len, 1))
{
/* Yes, move them to the front of the buffer. */
- pstr->tip_context = re_string_context_at (pstr, offset - 1, eflags);
#ifdef RE_ENABLE_I18N
- if (pstr->mb_cur_max > 1)
- memmove (pstr->wcs, pstr->wcs + offset,
- (pstr->valid_len - offset) * sizeof (wint_t));
+ if (BE (pstr->offsets_needed, 0))
+ {
+ Idx low = 0, high = pstr->valid_len, mid;
+ do
+ {
+ mid = (high + low) / 2;
+ if (pstr->offsets[mid] > offset)
+ high = mid;
+ else if (pstr->offsets[mid] < offset)
+ low = mid + 1;
+ else
+ break;
+ }
+ while (low < high);
+ if (pstr->offsets[mid] < offset)
+ ++mid;
+ pstr->tip_context = re_string_context_at (pstr, mid - 1,
+ eflags);
+ /* This can be quite complicated, so handle specially
+ only the common and easy case where the character with
+ different length representation of lower and upper
+ case is present at or after offset. */
+ if (pstr->valid_len > offset
+ && mid == offset && pstr->offsets[mid] == offset)
+ {
+ memmove (pstr->wcs, pstr->wcs + offset,
+ (pstr->valid_len - offset) * sizeof (wint_t));
+ memmove (pstr->mbs, pstr->mbs + offset, pstr->valid_len - offset);
+ pstr->valid_len -= offset;
+ pstr->valid_raw_len -= offset;
+ for (low = 0; low < pstr->valid_len; low++)
+ pstr->offsets[low] = pstr->offsets[low + offset] - offset;
+ }
+ else
+ {
+ /* Otherwise, just find out how long the partial multibyte
+ character at offset is and fill it with WEOF/255. */
+ pstr->len = pstr->raw_len - idx + offset;
+ pstr->stop = pstr->raw_stop - idx + offset;
+ pstr->offsets_needed = 0;
+ while (mid > 0 && pstr->offsets[mid - 1] == offset)
+ --mid;
+ while (mid < pstr->valid_len)
+ if (pstr->wcs[mid] != WEOF)
+ break;
+ else
+ ++mid;
+ if (mid == pstr->valid_len)
+ pstr->valid_len = 0;
+ else
+ {
+ pstr->valid_len = pstr->offsets[mid] - offset;
+ if (pstr->valid_len)
+ {
+ for (low = 0; low < pstr->valid_len; ++low)
+ pstr->wcs[low] = WEOF;
+ memset (pstr->mbs, 255, pstr->valid_len);
+ }
+ }
+ pstr->valid_raw_len = pstr->valid_len;
+ }
+ }
+ else
+#endif
+ {
+ pstr->tip_context = re_string_context_at (pstr, offset - 1,
+ eflags);
+#ifdef RE_ENABLE_I18N
+ if (pstr->mb_cur_max > 1)
+ memmove (pstr->wcs, pstr->wcs + offset,
+ (pstr->valid_len - offset) * sizeof (wint_t));
#endif /* RE_ENABLE_I18N */
- if (BE (pstr->mbs_allocated, 0))
- memmove (pstr->mbs, pstr->mbs + offset,
- pstr->valid_len - offset);
- pstr->valid_len -= offset;
- pstr->valid_raw_len -= offset;
+ if (BE (pstr->mbs_allocated, 0))
+ memmove (pstr->mbs, pstr->mbs + offset,
+ pstr->valid_len - offset);
+ pstr->valid_len -= offset;
+ pstr->valid_raw_len -= offset;
#if DEBUG
- assert (pstr->valid_len > 0);
+ assert (pstr->valid_len > 0);
#endif
+ }
}
else
{
- /* No, skip all characters until IDX. */
#ifdef RE_ENABLE_I18N
+ /* No, skip all characters until IDX. */
+ Idx prev_valid_len = pstr->valid_len;
+
if (BE (pstr->offsets_needed, 0))
{
pstr->len = pstr->raw_len - idx + offset;
}
#endif
pstr->valid_len = 0;
- pstr->valid_raw_len = 0;
#ifdef RE_ENABLE_I18N
if (pstr->mb_cur_max > 1)
{
- int wcs_idx;
+ Idx wcs_idx;
wint_t wc = WEOF;
if (pstr->is_utf8)
{
- const unsigned char *raw, *p, *q, *end;
+ const unsigned char *raw, *p, *end;
/* Special case UTF-8. Multi-byte chars start with any
byte other than 0x80 - 0xbf. */
raw = pstr->raw_mbs + pstr->raw_mbs_idx;
end = raw + (offset - pstr->mb_cur_max);
- for (p = raw + offset - 1; p >= end; --p)
- if ((*p & 0xc0) != 0x80)
- {
- mbstate_t cur_state;
- wchar_t wc2;
- int mlen = raw + pstr->len - p;
- unsigned char buf[6];
-
- q = p;
- if (BE (pstr->trans != NULL, 0))
- {
- int i = mlen < 6 ? mlen : 6;
- while (--i >= 0)
- buf[i] = pstr->trans[p[i]];
- q = buf;
- }
- /* XXX Don't use mbrtowc, we know which conversion
- to use (UTF-8 -> UCS4). */
- memset (&cur_state, 0, sizeof (cur_state));
- mlen = (mbrtowc (&wc2, (const char *) p, mlen,
- &cur_state)
- - (raw + offset - p));
- if (mlen >= 0)
- {
- memset (&pstr->cur_state, '\0',
- sizeof (mbstate_t));
- pstr->valid_len = mlen;
- wc = wc2;
- }
- break;
- }
+ if (end < pstr->raw_mbs)
+ end = pstr->raw_mbs;
+ p = raw + offset - 1;
+#ifdef _LIBC
+ /* We know the wchar_t encoding is UCS4, so for the simple
+ case, ASCII characters, skip the conversion step. */
+ if (isascii (*p) && BE (pstr->trans == NULL, 1))
+ {
+ memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
+ /* pstr->valid_len = 0; */
+ wc = (wchar_t) *p;
+ }
+ else
+#endif
+ for (; p >= end; --p)
+ if ((*p & 0xc0) != 0x80)
+ {
+ mbstate_t cur_state;
+ wchar_t wc2;
+ Idx mlen = raw + pstr->len - p;
+ unsigned char buf[6];
+ size_t mbclen;
+
+ const unsigned char *pp = p;
+ if (BE (pstr->trans != NULL, 0))
+ {
+ int i = mlen < 6 ? mlen : 6;
+ while (--i >= 0)
+ buf[i] = pstr->trans[p[i]];
+ pp = buf;
+ }
+ /* XXX Don't use mbrtowc, we know which conversion
+ to use (UTF-8 -> UCS4). */
+ memset (&cur_state, 0, sizeof (cur_state));
+ mbclen = __mbrtowc (&wc2, (const char *) pp, mlen,
+ &cur_state);
+ if (raw + offset - p <= mbclen
+ && mbclen < (size_t) -2)
+ {
+ memset (&pstr->cur_state, '\0',
+ sizeof (mbstate_t));
+ pstr->valid_len = mbclen - (raw + offset - p);
+ wc = wc2;
+ }
+ break;
+ }
}
if (wc == WEOF)
pstr->valid_len = re_string_skip_chars (pstr, idx, &wc) - idx;
+ if (wc == WEOF)
+ pstr->tip_context
+ = re_string_context_at (pstr, prev_valid_len - 1, eflags);
+ else
+ pstr->tip_context = ((BE (pstr->word_ops_used != 0, 0)
+ && IS_WIDE_WORD_CHAR (wc))
+ ? CONTEXT_WORD
+ : ((IS_WIDE_NEWLINE (wc)
+ && pstr->newline_anchor)
+ ? CONTEXT_NEWLINE : 0));
if (BE (pstr->valid_len, 0))
{
for (wcs_idx = 0; wcs_idx < pstr->valid_len; ++wcs_idx)
memset (pstr->mbs, 255, pstr->valid_len);
}
pstr->valid_raw_len = pstr->valid_len;
- pstr->tip_context = ((BE (pstr->word_ops_used != 0, 0)
- && IS_WIDE_WORD_CHAR (wc))
- ? CONTEXT_WORD
- : ((IS_WIDE_NEWLINE (wc)
- && pstr->newline_anchor)
- ? CONTEXT_NEWLINE : 0));
}
else
#endif /* RE_ENABLE_I18N */
{
int c = pstr->raw_mbs[pstr->raw_mbs_idx + offset - 1];
+ pstr->valid_raw_len = 0;
if (pstr->trans)
c = pstr->trans[c];
pstr->tip_context = (bitset_contain (pstr->word_char, c)
{
if (pstr->icase)
{
- int ret = build_wcs_upper_buffer (pstr);
+ reg_errcode_t ret = build_wcs_upper_buffer (pstr);
if (BE (ret != REG_NOERROR, 0))
return ret;
}
}
else
#endif /* RE_ENABLE_I18N */
- if (BE (pstr->mbs_allocated, 0))
- {
- if (pstr->icase)
- build_upper_buffer (pstr);
- else if (pstr->trans != NULL)
- re_string_translate_buffer (pstr);
- }
- else
- pstr->valid_len = pstr->len;
+ if (BE (pstr->mbs_allocated, 0))
+ {
+ if (pstr->icase)
+ build_upper_buffer (pstr);
+ else if (pstr->trans != NULL)
+ re_string_translate_buffer (pstr);
+ }
+ else
+ pstr->valid_len = pstr->len;
pstr->cur_idx = 0;
return REG_NOERROR;
}
static unsigned char
-internal_function
-re_string_peek_byte_case (const re_string_t *pstr, int idx)
+internal_function __attribute__ ((pure))
+re_string_peek_byte_case (const re_string_t *pstr, Idx idx)
{
- int ch, off;
+ int ch;
+ Idx off;
/* Handle the common (easiest) cases first. */
if (BE (!pstr->mbs_allocated, 1))
#ifdef RE_ENABLE_I18N
if (pstr->offsets_needed)
{
- int off, ch;
+ Idx off;
+ int ch;
/* For tr_TR.UTF-8 [[:islower:]] there is
[[: CAPITAL LETTER I WITH DOT lower:]] in mbs. Skip
static unsigned int
internal_function
-re_string_context_at (const re_string_t *input, int idx, int eflags)
+re_string_context_at (const re_string_t *input, Idx idx, int eflags)
{
int c;
- if (BE (idx < 0, 0))
+ if (BE (! REG_VALID_INDEX (idx), 0))
/* In this case, we use the value stored in input->tip_context,
since we can't know the character in input->mbs[-1] here. */
return input->tip_context;
if (input->mb_cur_max > 1)
{
wint_t wc;
- int wc_idx = idx;
+ Idx wc_idx = idx;
while(input->wcs[wc_idx] == WEOF)
{
#ifdef DEBUG
/* It must not happen. */
- assert (wc_idx >= 0);
+ assert (REG_VALID_INDEX (wc_idx));
#endif
--wc_idx;
- if (wc_idx < 0)
+ if (! REG_VALID_INDEX (wc_idx))
return input->tip_context;
}
wc = input->wcs[wc_idx];
/* Functions for set operation. */
static reg_errcode_t
-internal_function
-re_node_set_alloc (re_node_set *set, int size)
+internal_function __attribute_warn_unused_result__
+re_node_set_alloc (re_node_set *set, Idx size)
{
set->alloc = size;
set->nelem = 0;
- set->elems = re_malloc (int, size);
- if (BE (set->elems == NULL, 0))
+ set->elems = re_malloc (Idx, size);
+ if (BE (set->elems == NULL, 0) && (MALLOC_0_IS_NONNULL || size != 0))
return REG_ESPACE;
return REG_NOERROR;
}
static reg_errcode_t
-internal_function
-re_node_set_init_1 (re_node_set *set, int elem)
+internal_function __attribute_warn_unused_result__
+re_node_set_init_1 (re_node_set *set, Idx elem)
{
set->alloc = 1;
set->nelem = 1;
- set->elems = re_malloc (int, 1);
+ set->elems = re_malloc (Idx, 1);
if (BE (set->elems == NULL, 0))
{
set->alloc = set->nelem = 0;
}
static reg_errcode_t
-internal_function
-re_node_set_init_2 (re_node_set *set, int elem1, int elem2)
+internal_function __attribute_warn_unused_result__
+re_node_set_init_2 (re_node_set *set, Idx elem1, Idx elem2)
{
set->alloc = 2;
- set->elems = re_malloc (int, 2);
+ set->elems = re_malloc (Idx, 2);
if (BE (set->elems == NULL, 0))
return REG_ESPACE;
if (elem1 == elem2)
}
static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
re_node_set_init_copy (re_node_set *dest, const re_node_set *src)
{
dest->nelem = src->nelem;
if (src->nelem > 0)
{
dest->alloc = dest->nelem;
- dest->elems = re_malloc (int, dest->alloc);
+ dest->elems = re_malloc (Idx, dest->alloc);
if (BE (dest->elems == NULL, 0))
{
dest->alloc = dest->nelem = 0;
return REG_ESPACE;
}
- memcpy (dest->elems, src->elems, src->nelem * sizeof (int));
+ memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
}
else
re_node_set_init_empty (dest);
Note: We assume dest->elems is NULL, when dest->alloc is 0. */
static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
re_node_set_add_intersect (re_node_set *dest, const re_node_set *src1,
const re_node_set *src2)
{
- int i1, i2, is, id, delta, sbase;
+ Idx i1, i2, is, id, delta, sbase;
if (src1->nelem == 0 || src2->nelem == 0)
return REG_NOERROR;
conservative estimate. */
if (src1->nelem + src2->nelem + dest->nelem > dest->alloc)
{
- int new_alloc = src1->nelem + src2->nelem + dest->alloc;
- int *new_elems = re_realloc (dest->elems, int, new_alloc);
+ Idx new_alloc = src1->nelem + src2->nelem + dest->alloc;
+ Idx *new_elems = re_realloc (dest->elems, Idx, new_alloc);
if (BE (new_elems == NULL, 0))
- return REG_ESPACE;
+ return REG_ESPACE;
dest->elems = new_elems;
dest->alloc = new_alloc;
}
if (src1->elems[i1] == src2->elems[i2])
{
/* Try to find the item in DEST. Maybe we could binary search? */
- while (id >= 0 && dest->elems[id] > src1->elems[i1])
+ while (REG_VALID_INDEX (id) && dest->elems[id] > src1->elems[i1])
--id;
- if (id < 0 || dest->elems[id] != src1->elems[i1])
+ if (! REG_VALID_INDEX (id) || dest->elems[id] != src1->elems[i1])
dest->elems[--sbase] = src1->elems[i1];
- if (--i1 < 0 || --i2 < 0)
+ if (! REG_VALID_INDEX (--i1) || ! REG_VALID_INDEX (--i2))
break;
}
/* Lower the highest of the two items. */
else if (src1->elems[i1] < src2->elems[i2])
{
- if (--i2 < 0)
+ if (! REG_VALID_INDEX (--i2))
break;
}
else
{
- if (--i1 < 0)
+ if (! REG_VALID_INDEX (--i1))
break;
}
}
DEST elements are already in place; this is more or
less the same loop that is in re_node_set_merge. */
dest->nelem += delta;
- if (delta > 0 && id >= 0)
+ if (delta > 0 && REG_VALID_INDEX (id))
for (;;)
{
- if (dest->elems[is] > dest->elems[id])
- {
- /* Copy from the top. */
- dest->elems[id + delta--] = dest->elems[is--];
- if (delta == 0)
- break;
- }
- else
- {
- /* Slide from the bottom. */
- dest->elems[id + delta] = dest->elems[id];
- if (--id < 0)
- break;
- }
+ if (dest->elems[is] > dest->elems[id])
+ {
+ /* Copy from the top. */
+ dest->elems[id + delta--] = dest->elems[is--];
+ if (delta == 0)
+ break;
+ }
+ else
+ {
+ /* Slide from the bottom. */
+ dest->elems[id + delta] = dest->elems[id];
+ if (! REG_VALID_INDEX (--id))
+ break;
+ }
}
/* Copy remaining SRC elements. */
- memcpy (dest->elems, dest->elems + sbase, delta * sizeof (int));
+ memcpy (dest->elems, dest->elems + sbase, delta * sizeof (Idx));
return REG_NOERROR;
}
DEST. Return value indicate the error code or REG_NOERROR if succeeded. */
static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
re_node_set_init_union (re_node_set *dest, const re_node_set *src1,
const re_node_set *src2)
{
- int i1, i2, id;
+ Idx i1, i2, id;
if (src1 != NULL && src1->nelem > 0 && src2 != NULL && src2->nelem > 0)
{
dest->alloc = src1->nelem + src2->nelem;
- dest->elems = re_malloc (int, dest->alloc);
+ dest->elems = re_malloc (Idx, dest->alloc);
if (BE (dest->elems == NULL, 0))
return REG_ESPACE;
}
if (i1 < src1->nelem)
{
memcpy (dest->elems + id, src1->elems + i1,
- (src1->nelem - i1) * sizeof (int));
+ (src1->nelem - i1) * sizeof (Idx));
id += src1->nelem - i1;
}
else if (i2 < src2->nelem)
{
memcpy (dest->elems + id, src2->elems + i2,
- (src2->nelem - i2) * sizeof (int));
+ (src2->nelem - i2) * sizeof (Idx));
id += src2->nelem - i2;
}
dest->nelem = id;
DEST. Return value indicate the error code or REG_NOERROR if succeeded. */
static reg_errcode_t
-internal_function
+internal_function __attribute_warn_unused_result__
re_node_set_merge (re_node_set *dest, const re_node_set *src)
{
- int is, id, sbase, delta;
+ Idx is, id, sbase, delta;
if (src == NULL || src->nelem == 0)
return REG_NOERROR;
if (dest->alloc < 2 * src->nelem + dest->nelem)
{
- int new_alloc = 2 * (src->nelem + dest->alloc);
- int *new_buffer = re_realloc (dest->elems, int, new_alloc);
+ Idx new_alloc = 2 * (src->nelem + dest->alloc);
+ Idx *new_buffer = re_realloc (dest->elems, Idx, new_alloc);
if (BE (new_buffer == NULL, 0))
return REG_ESPACE;
dest->elems = new_buffer;
if (BE (dest->nelem == 0, 0))
{
dest->nelem = src->nelem;
- memcpy (dest->elems, src->elems, src->nelem * sizeof (int));
+ memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
return REG_NOERROR;
}
/* Copy into the top of DEST the items of SRC that are not
found in DEST. Maybe we could binary search in DEST? */
for (sbase = dest->nelem + 2 * src->nelem,
- is = src->nelem - 1, id = dest->nelem - 1; is >= 0 && id >= 0; )
+ is = src->nelem - 1, id = dest->nelem - 1;
+ REG_VALID_INDEX (is) && REG_VALID_INDEX (id); )
{
if (dest->elems[id] == src->elems[is])
- is--, id--;
+ is--, id--;
else if (dest->elems[id] < src->elems[is])
- dest->elems[--sbase] = src->elems[is--];
+ dest->elems[--sbase] = src->elems[is--];
else /* if (dest->elems[id] > src->elems[is]) */
- --id;
+ --id;
}
- if (is >= 0)
+ if (REG_VALID_INDEX (is))
{
/* If DEST is exhausted, the remaining items of SRC must be unique. */
sbase -= is + 1;
- memcpy (dest->elems + sbase, src->elems, (is + 1) * sizeof (int));
+ memcpy (dest->elems + sbase, src->elems, (is + 1) * sizeof (Idx));
}
id = dest->nelem - 1;
for (;;)
{
if (dest->elems[is] > dest->elems[id])
- {
+ {
/* Copy from the top. */
- dest->elems[id + delta--] = dest->elems[is--];
+ dest->elems[id + delta--] = dest->elems[is--];
if (delta == 0)
break;
}
else
- {
- /* Slide from the bottom. */
- dest->elems[id + delta] = dest->elems[id];
- if (--id < 0)
+ {
+ /* Slide from the bottom. */
+ dest->elems[id + delta] = dest->elems[id];
+ if (! REG_VALID_INDEX (--id))
{
/* Copy remaining SRC elements. */
memcpy (dest->elems, dest->elems + sbase,
- delta * sizeof (int));
+ delta * sizeof (Idx));
break;
}
}
/* Insert the new element ELEM to the re_node_set* SET.
SET should not already have ELEM.
- return -1 if an error is occured, return 1 otherwise. */
+ Return true if successful. */
-static int
-internal_function
-re_node_set_insert (re_node_set *set, int elem)
+static bool
+internal_function __attribute_warn_unused_result__
+re_node_set_insert (re_node_set *set, Idx elem)
{
- int idx;
+ Idx idx;
/* In case the set is empty. */
if (set->alloc == 0)
- {
- if (BE (re_node_set_init_1 (set, elem) == REG_NOERROR, 1))
- return 1;
- else
- return -1;
- }
+ return BE (re_node_set_init_1 (set, elem) == REG_NOERROR, 1);
if (BE (set->nelem, 0) == 0)
{
/* We already guaranteed above that set->alloc != 0. */
set->elems[0] = elem;
++set->nelem;
- return 1;
+ return true;
}
/* Realloc if we need. */
if (set->alloc == set->nelem)
{
- int *new_elems;
+ Idx *new_elems;
set->alloc = set->alloc * 2;
- new_elems = re_realloc (set->elems, int, set->alloc);
+ new_elems = re_realloc (set->elems, Idx, set->alloc);
if (BE (new_elems == NULL, 0))
- return -1;
+ return false;
set->elems = new_elems;
}
{
idx = 0;
for (idx = set->nelem; idx > 0; idx--)
- set->elems[idx] = set->elems[idx - 1];
+ set->elems[idx] = set->elems[idx - 1];
}
else
{
for (idx = set->nelem; set->elems[idx - 1] > elem; idx--)
- set->elems[idx] = set->elems[idx - 1];
+ set->elems[idx] = set->elems[idx - 1];
}
/* Insert the new element. */
set->elems[idx] = elem;
++set->nelem;
- return 1;
+ return true;
}
/* Insert the new element ELEM to the re_node_set* SET.
SET should not already have any element greater than or equal to ELEM.
- Return -1 if an error is occured, return 1 otherwise. */
+ Return true if successful. */
-static int
-internal_function
-re_node_set_insert_last (re_node_set *set, int elem)
+static bool
+internal_function __attribute_warn_unused_result__
+re_node_set_insert_last (re_node_set *set, Idx elem)
{
/* Realloc if we need. */
if (set->alloc == set->nelem)
{
- int *new_elems;
+ Idx *new_elems;
set->alloc = (set->alloc + 1) * 2;
- new_elems = re_realloc (set->elems, int, set->alloc);
+ new_elems = re_realloc (set->elems, Idx, set->alloc);
if (BE (new_elems == NULL, 0))
- return -1;
+ return false;
set->elems = new_elems;
}
/* Insert the new element. */
set->elems[set->nelem++] = elem;
- return 1;
+ return true;
}
/* Compare two node sets SET1 and SET2.
- return 1 if SET1 and SET2 are equivalent, return 0 otherwise. */
+ Return true if SET1 and SET2 are equivalent. */
-static int
-internal_function
+static bool
+internal_function __attribute__ ((pure))
re_node_set_compare (const re_node_set *set1, const re_node_set *set2)
{
- int i;
+ Idx i;
if (set1 == NULL || set2 == NULL || set1->nelem != set2->nelem)
- return 0;
- for (i = set1->nelem ; --i >= 0 ; )
+ return false;
+ for (i = set1->nelem ; REG_VALID_INDEX (--i) ; )
if (set1->elems[i] != set2->elems[i])
- return 0;
- return 1;
+ return false;
+ return true;
}
/* Return (idx + 1) if SET contains the element ELEM, return 0 otherwise. */
-static int
-internal_function
-re_node_set_contains (const re_node_set *set, int elem)
+static Idx
+internal_function __attribute__ ((pure))
+re_node_set_contains (const re_node_set *set, Idx elem)
{
- unsigned int idx, right, mid;
- if (set->nelem <= 0)
+ __re_size_t idx, right, mid;
+ if (! REG_VALID_NONZERO_INDEX (set->nelem))
return 0;
/* Binary search the element. */
static void
internal_function
-re_node_set_remove_at (re_node_set *set, int idx)
+re_node_set_remove_at (re_node_set *set, Idx idx)
{
if (idx < 0 || idx >= set->nelem)
return;
\f
/* Add the token TOKEN to dfa->nodes, and return the index of the token.
- Or return -1, if an error will be occured. */
+ Or return REG_MISSING if an error occurred. */
-static int
+static Idx
internal_function
re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
{
- int type = token.type;
if (BE (dfa->nodes_len >= dfa->nodes_alloc, 0))
{
- int new_nodes_alloc = dfa->nodes_alloc * 2;
- int *new_nexts, *new_indices;
+ size_t new_nodes_alloc = dfa->nodes_alloc * 2;
+ Idx *new_nexts, *new_indices;
re_node_set *new_edests, *new_eclosures;
+ re_token_t *new_nodes;
+
+ /* Avoid overflows in realloc. */
+ const size_t max_object_size = MAX (sizeof (re_token_t),
+ MAX (sizeof (re_node_set),
+ sizeof (Idx)));
+ if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < new_nodes_alloc, 0))
+ return REG_MISSING;
- re_token_t *new_nodes = re_realloc (dfa->nodes, re_token_t,
- new_nodes_alloc);
+ new_nodes = re_realloc (dfa->nodes, re_token_t, new_nodes_alloc);
if (BE (new_nodes == NULL, 0))
- return -1;
+ return REG_MISSING;
dfa->nodes = new_nodes;
- new_nexts = re_realloc (dfa->nexts, int, new_nodes_alloc);
- new_indices = re_realloc (dfa->org_indices, int, new_nodes_alloc);
+ new_nexts = re_realloc (dfa->nexts, Idx, new_nodes_alloc);
+ new_indices = re_realloc (dfa->org_indices, Idx, 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);
if (BE (new_nexts == NULL || new_indices == NULL
|| new_edests == NULL || new_eclosures == NULL, 0))
- return -1;
+ return REG_MISSING;
dfa->nexts = new_nexts;
dfa->org_indices = new_indices;
dfa->edests = new_edests;
dfa->nodes[dfa->nodes_len].constraint = 0;
#ifdef RE_ENABLE_I18N
dfa->nodes[dfa->nodes_len].accept_mb =
- (type == OP_PERIOD && dfa->mb_cur_max > 1) || type == COMPLEX_BRACKET;
+ ((token.type == OP_PERIOD && dfa->mb_cur_max > 1)
+ || token.type == COMPLEX_BRACKET);
#endif
- dfa->nexts[dfa->nodes_len] = -1;
+ dfa->nexts[dfa->nodes_len] = REG_MISSING;
re_node_set_init_empty (dfa->edests + dfa->nodes_len);
re_node_set_init_empty (dfa->eclosures + dfa->nodes_len);
return dfa->nodes_len++;
}
-static inline unsigned int
+static re_hashval_t
internal_function
calc_state_hash (const re_node_set *nodes, unsigned int context)
{
- unsigned int hash = nodes->nelem + context;
- int i;
+ re_hashval_t hash = nodes->nelem + context;
+ Idx i;
for (i = 0 ; i < nodes->nelem ; i++)
hash += nodes->elems[i];
return hash;
- We never return non-NULL value in case of any errors, it is for
optimization. */
-static re_dfastate_t*
-internal_function
-re_acquire_state (reg_errcode_t *err, re_dfa_t *dfa, const re_node_set *nodes)
+static re_dfastate_t *
+internal_function __attribute_warn_unused_result__
+re_acquire_state (reg_errcode_t *err, const re_dfa_t *dfa,
+ const re_node_set *nodes)
{
- unsigned int hash;
+ re_hashval_t hash;
re_dfastate_t *new_state;
struct re_state_table_entry *spot;
- int i;
+ Idx i;
#ifdef lint
/* Suppress bogus uninitialized-variable warnings. */
*err = REG_NOERROR;
/* There are no appropriate state in the dfa, create the new one. */
new_state = create_ci_newstate (dfa, nodes, hash);
- if (BE (new_state != NULL, 1))
- return new_state;
- else
- {
- *err = REG_ESPACE;
- return NULL;
- }
+ if (BE (new_state == NULL, 0))
+ *err = REG_ESPACE;
+
+ return new_state;
}
/* Search for the state whose node_set is equivalent to NODES and
- We never return non-NULL value in case of any errors, it is for
optimization. */
-static re_dfastate_t*
-internal_function
-re_acquire_state_context (reg_errcode_t *err, re_dfa_t *dfa,
+static re_dfastate_t *
+internal_function __attribute_warn_unused_result__
+re_acquire_state_context (reg_errcode_t *err, const re_dfa_t *dfa,
const re_node_set *nodes, unsigned int context)
{
- unsigned int hash;
+ re_hashval_t hash;
re_dfastate_t *new_state;
struct re_state_table_entry *spot;
- int i;
+ Idx i;
#ifdef lint
/* Suppress bogus uninitialized-variable warnings. */
*err = REG_NOERROR;
&& re_node_set_compare (state->entrance_nodes, nodes))
return state;
}
- /* There are no appropriate state in `dfa', create the new one. */
+ /* There are no appropriate state in 'dfa', create the new one. */
new_state = create_cd_newstate (dfa, nodes, context, hash);
- if (BE (new_state != NULL, 1))
- return new_state;
- else
- {
- *err = REG_ESPACE;
- return NULL;
- }
+ if (BE (new_state == NULL, 0))
+ *err = REG_ESPACE;
+
+ return new_state;
}
/* Finish initialization of the new state NEWSTATE, and using its hash value
indicates the error code if failed. */
static reg_errcode_t
-internal_function
-register_state (re_dfa_t *dfa, re_dfastate_t *newstate, unsigned int hash)
+__attribute_warn_unused_result__
+register_state (const re_dfa_t *dfa, re_dfastate_t *newstate,
+ re_hashval_t hash)
{
struct re_state_table_entry *spot;
reg_errcode_t err;
- int i;
+ Idx i;
newstate->hash = hash;
err = re_node_set_alloc (&newstate->non_eps_nodes, newstate->nodes.nelem);
return REG_ESPACE;
for (i = 0; i < newstate->nodes.nelem; i++)
{
- int elem = newstate->nodes.elems[i];
+ Idx elem = newstate->nodes.elems[i];
if (!IS_EPSILON_NODE (dfa->nodes[elem].type))
- re_node_set_insert_last (&newstate->non_eps_nodes, elem);
+ if (! re_node_set_insert_last (&newstate->non_eps_nodes, elem))
+ return REG_ESPACE;
}
spot = dfa->state_table + (hash & dfa->state_hash_mask);
if (BE (spot->alloc <= spot->num, 0))
{
- int new_alloc = 2 * spot->num + 2;
+ Idx new_alloc = 2 * spot->num + 2;
re_dfastate_t **new_array = re_realloc (spot->array, re_dfastate_t *,
new_alloc);
if (BE (new_array == NULL, 0))
return REG_NOERROR;
}
-/* Create the new state which is independ of contexts.
+static void
+free_state (re_dfastate_t *state)
+{
+ re_node_set_free (&state->non_eps_nodes);
+ re_node_set_free (&state->inveclosure);
+ if (state->entrance_nodes != &state->nodes)
+ {
+ re_node_set_free (state->entrance_nodes);
+ re_free (state->entrance_nodes);
+ }
+ re_node_set_free (&state->nodes);
+ re_free (state->word_trtable);
+ re_free (state->trtable);
+ re_free (state);
+}
+
+/* Create the new state which is independent of contexts.
Return the new state if succeeded, otherwise return NULL. */
static re_dfastate_t *
-internal_function
-create_ci_newstate (re_dfa_t *dfa, const re_node_set *nodes, unsigned int hash)
+internal_function __attribute_warn_unused_result__
+create_ci_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
+ re_hashval_t hash)
{
- int i;
+ Idx i;
reg_errcode_t err;
re_dfastate_t *newstate;
Return the new state if succeeded, otherwise return NULL. */
static re_dfastate_t *
-internal_function
-create_cd_newstate (re_dfa_t *dfa, const re_node_set *nodes,
- unsigned int context, unsigned int hash)
+internal_function __attribute_warn_unused_result__
+create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
+ unsigned int context, re_hashval_t hash)
{
- int i, nctx_nodes = 0;
+ Idx i, nctx_nodes = 0;
reg_errcode_t err;
re_dfastate_t *newstate;
for (i = 0 ; i < nodes->nelem ; i++)
{
- unsigned int constraint = 0;
re_token_t *node = dfa->nodes + nodes->elems[i];
re_token_type_t type = node->type;
- if (node->constraint)
- constraint = node->constraint;
+ unsigned int constraint = node->constraint;
if (type == CHARACTER && !constraint)
continue;
newstate->halt = 1;
else if (type == OP_BACK_REF)
newstate->has_backref = 1;
- else if (type == ANCHOR)
- constraint = node->opr.ctx_type;
if (constraint)
{
free_state (newstate);
return NULL;
}
- re_node_set_init_copy (newstate->entrance_nodes, nodes);
+ if (re_node_set_init_copy (newstate->entrance_nodes, nodes)
+ != REG_NOERROR)
+ return NULL;
nctx_nodes = 0;
newstate->has_constraint = 1;
}
}
return newstate;
}
-
-static void
-internal_function
-free_state (re_dfastate_t *state)
-{
- re_node_set_free (&state->non_eps_nodes);
- re_node_set_free (&state->inveclosure);
- if (state->entrance_nodes != &state->nodes)
- {
- re_node_set_free (state->entrance_nodes);
- re_free (state->entrance_nodes);
- }
- re_node_set_free (&state->nodes);
- re_free (state->word_trtable);
- re_free (state->trtable);
- re_free (state);
-}
projects / gnulib.git / blobdiff