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- Jakub Jelinek's much improved -Fi algorithm.

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This commit is contained in:
Tim Waugh 2004-12-31 15:43:57 +00:00
parent ee9a86c698
commit ff7a532bf5
2 changed files with 374 additions and 210 deletions
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533
grep-2.5.1-egf-speedup.patch
View File

@ -1,6 +1,12 @@
--- grep-2.5.1/src/search.c 2004-12-21 13:37:15.700555594 +0000
+++ grep-2.5.1/src/search.c 2004-12-21 13:49:05.873811016 +0000
@@ -21,6 +21,7 @@
--- grep-2.5.1/src/search.c.egf-speedup 2004-12-31 15:26:52.187199404 +0000
+++ grep-2.5.1/src/search.c 2004-12-31 15:28:35.720391036 +0000
@@ -18,9 +18,13 @@
/* Written August 1992 by Mike Haertel. */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
@ -8,7 +14,7 @@
#include <sys/types.h>
#if defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H && defined HAVE_MBRTOWC
/* We can handle multibyte string. */
@@ -39,6 +40,9 @@
@@ -39,6 +43,9 @@
#ifdef HAVE_LIBPCRE
# include <pcre.h>
#endif
@ -18,7 +24,7 @@
#define NCHAR (UCHAR_MAX + 1)
@@ -70,9 +74,10 @@
@@ -70,9 +77,10 @@
call the regexp matcher at all. */
static int kwset_exact_matches;
@ -32,7 +38,7 @@
static void kwsinit PARAMS ((void));
static void kwsmusts PARAMS ((void));
static void Gcompile PARAMS ((char const *, size_t));
@@ -84,6 +89,15 @@
@@ -84,6 +92,15 @@
static size_t Pexecute PARAMS ((char const *, size_t, size_t *, int));
void
@ -48,7 +54,7 @@
dfaerror (char const *mesg)
{
error (2, 0, mesg);
@@ -141,47 +155,6 @@
@@ -141,47 +158,6 @@
}
}
@ -96,7 +102,7 @@
static void
Gcompile (char const *pattern, size_t size)
{
@@ -190,6 +163,7 @@
@@ -190,6 +166,7 @@
size_t total = size;
char const *motif = pattern;
@ -104,7 +110,7 @@
re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE | (match_icase ? RE_ICASE : 0));
dfasyntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE, match_icase, eolbyte);
@@ -266,6 +240,7 @@
@@ -266,6 +243,7 @@
size_t total = size;
char const *motif = pattern;
@ -112,7 +118,7 @@
if (strcmp (matcher, "awk") == 0)
{
re_set_syntax (RE_SYNTAX_AWK | (match_icase ? RE_ICASE : 0));
@@ -350,18 +325,8 @@
@@ -350,18 +328,8 @@
struct kwsmatch kwsm;
size_t i, ret_val;
#ifdef MBS_SUPPORT
@ -133,7 +139,7 @@
#endif /* MBS_SUPPORT */
buflim = buf + size;
@@ -373,21 +338,63 @@
@@ -373,21 +341,63 @@
if (kwset)
{
/* Find a possible match using the KWset matcher. */
@ -201,7 +207,7 @@
goto success_in_beg_and_end;
if (dfaexec (&dfa, beg, end - beg, &backref) == (size_t) -1)
continue;
@@ -395,13 +402,47 @@
@@ -395,13 +405,47 @@
else
{
/* No good fixed strings; start with DFA. */
@ -249,7 +255,7 @@
while (beg > buf && beg[-1] != eol)
--beg;
}
@@ -469,15 +510,6 @@
@@ -469,15 +513,6 @@
} /* for (beg = end ..) */
failure:
@ -265,7 +271,7 @@
return (size_t) -1;
success_in_beg_and_end:
@@ -486,24 +518,125 @@
@@ -486,24 +521,143 @@
/* FALLTHROUGH */
success_in_start_and_len:
@ -282,10 +288,15 @@
return start;
}
+static wchar_t **f_pattern;
+static char *f_initial_byte;
+static size_t f_pattern_count;
+#ifdef MBS_SUPPORT
+static int f_i_multibyte; /* whether we're using the new -Fi MB method */
+static struct
+{
+ wchar_t **patterns;
+ size_t count, maxlen;
+ unsigned char *match;
+} Fimb;
+#endif
+
static void
Fcompile (char const *pattern, size_t size)
@ -297,101 +308,114 @@
+ /* Support -F -i for UTF-8 input. */
+ if (match_icase && MB_CUR_MAX > 1)
+ {
+ size_t in = 0;
+
+ while (f_i_multibyte != -1 && in < size)
+ {
+ wchar_t *f_this_pattern;
+ size_t f_this_pattern_allocated = sizeof (wchar_t) * 1000;
+ mbstate_t mbs;
+ size_t out = 0;
+ f_pattern_count++;
+ f_pattern = xrealloc (f_pattern,
+ sizeof (wchar_t *) * f_pattern_count);
+ f_initial_byte = xrealloc (f_initial_byte,
+ sizeof (char) *
+ (2 * f_pattern_count + 1));
+ if (f_pattern_count == 1)
+ f_initial_byte[0] = '\0';
+ wchar_t *wcpattern = xmalloc ((size + 1) * sizeof (wchar_t));
+ const char *patternend = pattern;
+ size_t wcsize;
+ kwset_t fimb_kwset = NULL;
+ char *starts = NULL;
+ wchar_t *wcbeg, *wclim;
+ size_t allocated = 0;
+
+ /* Convert pattern into wchar_t*, storing them in this_pattern.
+ Don't read more than we're given. */
+ f_this_pattern = xmalloc (f_this_pattern_allocated);
+ memset (&mbs, '\0', sizeof (mbs));
+ while (in < size)
+# ifdef __GNU_LIBRARY__
+ wcsize = mbsnrtowcs (wcpattern, &patternend, size, size, &mbs);
+ if (patternend != pattern + size)
+ wcsize = (size_t) -1;
+# else
+ {
+ size_t c;
+ wchar_t this_wc;
+ if (out == f_this_pattern_allocated)
+ {
+ f_this_pattern_allocated *= 2;
+ f_this_pattern = xrealloc (f_this_pattern,
+ f_this_pattern_allocated);
+ char *patterncopy = xmalloc (size + 1);
+
+ memcpy (patterncopy, pattern, size);
+ patterncopy[size] = '\0';
+ patternend = patterncopy;
+ wcsize = mbsrtowcs (wcpattern, &patternend, size, &mbs);
+ if (patternend != patterncopy + size)
+ wcsize = (size_t) -1;
+ free (patterncopy);
+ }
+
+ c = mbrtowc (&this_wc, pattern + in, size - in, &mbs);
+ if (c < 1)
+# endif
+ if (wcsize + 2 <= 2)
+ {
+ /* Fall back to old method. */
+ f_i_multibyte = -1;
+ while (f_pattern_count--)
+ free (f_pattern[f_pattern_count]);
+ free (f_pattern);
+ f_pattern = NULL;
+ break;
+ }
+
+ f_this_pattern[out] = towlower (this_wc);
+ if (out == 0)
+ {
+ /* First character. Work out the first byte of upper and
+ lower case multibyte strings for the first character. */
+ wchar_t wc;
+ char mbs[MB_CUR_MAX];
+ mbstate_t ps;
+
+ if (iswupper (this_wc))
+ {
+ wc = towlower (this_wc);
+fimb_fail:
+ free (wcpattern);
+ free (starts);
+ if (fimb_kwset)
+ kwsfree (fimb_kwset);
+ free (Fimb.patterns);
+ Fimb.patterns = NULL;
+ }
+ else
+ {
+ wc = towupper (this_wc);
+ }
+ if (!(fimb_kwset = kwsalloc (NULL)))
+ error (2, 0, _("memory exhausted"));
+
+ memset (&ps, '\0', sizeof (ps));
+ wcrtomb (mbs, this_wc, &ps);
+ mbs[1] = '\0';
+ strcat (f_initial_byte, mbs);
+
+ memset (&ps, '\0', sizeof (ps));
+ wcrtomb (mbs, wc, &ps);
+ mbs[1] = '\0';
+ strcat (f_initial_byte, mbs);
+ }
+
+ in += c;
+
+ if (this_wc == L'\n')
+ break;
+
+ out++;
+ }
+
+ if (f_i_multibyte == -1)
+ break;
+
+ /* Nul-terminate it. */
+ if (out == f_this_pattern_allocated)
+ starts = xmalloc (MB_CUR_MAX * 3);
+ wcbeg = wcpattern;
+ do
+ {
+ f_this_pattern_allocated++;
+ f_this_pattern = xrealloc (f_this_pattern,
+ f_this_pattern_allocated);
+ }
+ int i;
+ size_t wclen;
+
+ f_this_pattern[out] = L'\0';
+ f_pattern[f_pattern_count - 1] = f_this_pattern;
+ if (Fimb.count >= allocated)
+ {
+ if (allocated == 0)
+ allocated = 128;
+ else
+ allocated *= 2;
+ Fimb.patterns = xrealloc (Fimb.patterns,
+ sizeof (wchar_t *) * allocated);
+ }
+ Fimb.patterns[Fimb.count++] = wcbeg;
+ for (wclim = wcbeg;
+ wclim < wcpattern + wcsize && *wclim != L'\n'; ++wclim)
+ *wclim = towlower (*wclim);
+ *wclim = L'\0';
+ wclen = wclim - wcbeg;
+ if (wclen > Fimb.maxlen)
+ Fimb.maxlen = wclen;
+ if (wclen > 3)
+ wclen = 3;
+ if (wclen == 0)
+ {
+ if ((err = kwsincr (fimb_kwset, "", 0)) != 0)
+ error (2, 0, err);
+ }
+ else
+ for (i = 0; i < (1 << wclen); i++)
+ {
+ char *p = starts;
+ int j, k;
+
+ for (j = 0; j < wclen; ++j)
+ {
+ wchar_t wc = wcbeg[j];
+ if (i & (1 << j))
+ {
+ wc = towupper (wc);
+ if (wc == wcbeg[j])
+ continue;
+ }
+ k = wctomb (p, wc);
+ if (k <= 0)
+ goto fimb_fail;
+ p += k;
+ }
+ if ((err = kwsincr (fimb_kwset, starts, p - starts)) != 0)
+ error (2, 0, err);
+ }
+ if (wclim < wcpattern + wcsize)
+ ++wclim;
+ wcbeg = wclim;
+ }
+ while (wcbeg < wcpattern + wcsize);
+ f_i_multibyte = 1;
+ kwset = fimb_kwset;
+ free (starts);
+ Fimb.match = xmalloc (Fimb.count);
+ if ((err = kwsprep (kwset)) != 0)
+ error (2, 0, err);
+ return;
+ }
+ }
+#endif /* MBS_SUPPORT */
@ -400,77 +424,69 @@
kwsinit ();
beg = pattern;
do
@@ -523,6 +656,87 @@
@@ -522,6 +676,76 @@
error (2, 0, err);
}
static size_t
+Fimbexec (const char *buf, size_t size, size_t *plen)
+#ifdef MBS_SUPPORT
+static int
+Fimbexec (const char *buf, size_t size, size_t *plen, int exact)
+{
+ char const *beg;
+ size_t len;
+ size_t len, letter, i;
+ int ret = -1;
+ mbstate_t mbs;
+ wchar_t wc;
+ int patterns_left;
+
+ assert (match_icase && f_i_multibyte == 1);
+ assert (MB_CUR_MAX > 1);
+
+ memset (&mbs, '\0', sizeof (mbs));
+ beg = buf;
+ len = 0;
+ while (beg < buf + size)
+ {
+ wchar_t wc;
+ char const *p;
+ char const *next_char;
+ unsigned char match[f_pattern_count];
+ size_t i, letter;
+ int patterns_left;
+
+ for (p = beg;
+ (p < buf + size) && !strchr (f_initial_byte, *p);
+ p++)
+ ;
+
+ if (p == NULL || p == buf + size)
+ break;
+
+ /* First byte matches, now check the rest */
+ beg = p;
+ memset (Fimb.match, '\1', Fimb.count);
+ letter = len = 0;
+ memset (match, '\1', f_pattern_count);
+ patterns_left = 1;
+ while (patterns_left)
+ while (patterns_left && len <= size)
+ {
+ size_t c;
+
+ patterns_left = 0;
+
+ c = mbrtowc (&wc, beg + len, size - (beg - buf) - len, &mbs);
+ if (c < 1)
+ if (len < size)
+ {
+ memset (&mbs, '\0', sizeof (mbs));
+ next_char = beg + 1;
+ break;
+ }
+
+ if (!len)
+ next_char = beg + c;
+ c = mbrtowc (&wc, buf + len, size - len, &mbs);
+ if (c + 2 <= 2)
+ return ret;
+
+ wc = towlower (wc);
+ for (i = 0; i < f_pattern_count; i++)
+ }
+ else
+ {
+ if (match[i])
+ c = 1;
+ wc = L'\0';
+ }
+
+ for (i = 0; i < Fimb.count; i++)
+ {
+ if (f_pattern[i][letter] == L'\0')
+ if (Fimb.match[i])
+ {
+ if (Fimb.patterns[i][letter] == L'\0')
+ {
+ /* Found a match. */
+ *plen = len;
+ return beg - buf;
+ if (!exact && !match_words)
+ return 0;
+ else
+ {
+ /* For -w or exact look for longest match. */
+ ret = 0;
+ Fimb.match[i] = '\0';
+ continue;
+ }
+ }
+
+ if (f_pattern[i][letter] == wc)
+ if (Fimb.patterns[i][letter] == wc)
+ patterns_left = 1;
+ else
+ match[i] = '\0';
+ Fimb.match[i] = '\0';
+ }
+ }
+
@ -478,17 +494,14 @@
+ letter++;
+ }
+
+ beg = next_char;
+ return ret;
+}
+#endif /* MBS_SUPPORT */
+
+ return -1;
+}
+
+static size_t
static size_t
Fexecute (char const *buf, size_t size, size_t *match_size, int exact)
{
register char const *beg, *try, *end;
@@ -531,27 +745,50 @@
@@ -531,80 +755,258 @@
struct kwsmatch kwsmatch;
size_t ret_val;
#ifdef MBS_SUPPORT
@ -503,19 +516,16 @@
- }
- mb_properties = check_multibyte_string(buf, size);
- }
+ int mb_cur_max = MB_CUR_MAX;
+ mbstate_t mbs;
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ const char *last_char = NULL;
#endif /* MBS_SUPPORT */
for (beg = buf; beg <= buf + size; ++beg)
{
- size_t offset = kwsexec (kwset, beg, buf + size - beg, &kwsmatch);
+ size_t offset;
+#ifdef MBS_SUPPORT
+ if (match_icase && f_i_multibyte == 1)
+ offset = Fimbexec (beg, buf + size - beg, &kwsmatch.size[0]);
+ else
+#endif /* MBS_SUPPORT */
+ offset = kwsexec (kwset, beg, buf + size - beg, &kwsmatch);
+
if (offset == (size_t) -1)
@ -523,13 +533,15 @@
#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1 && mb_properties[offset+beg-buf] == 0)
- continue; /* It is a part of multibyte character. */
+ if (MB_CUR_MAX > 1 && !using_utf8)
+ if (mb_cur_max > 1 && !using_utf8)
+ {
+ size_t bytes_left = offset;
+ while (bytes_left)
+ {
+ size_t len = mbrlen (beg, bytes_left, &mbs);
+ if (len == (size_t) -1 || len == 0)
+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
+
+ last_char = beg;
+ if (mlen == (size_t) -1 || mlen == 0)
+ {
+ /* Incomplete character: treat as single-byte. */
+ memset (&mbs, '\0', sizeof (mbstate_t));
@ -538,12 +550,12 @@
+ continue;
+ }
+
+ if (len == (size_t) -2)
+ if (mlen == (size_t) -2)
+ /* Offset points inside multibyte character: no good. */
+ break;
+
+ beg += len;
+ bytes_left -= len;
+ beg += mlen;
+ bytes_left -= mlen;
+ }
+
+ if (bytes_left)
@ -552,29 +564,128 @@
+ else
#endif /* MBS_SUPPORT */
beg += offset;
len = kwsmatch.size[0];
@@ -583,10 +820,46 @@
{
/* Try a shorter length anchored at the same place. */
--len;
+#ifdef MBS_SUPPORT
+ if (match_icase && f_i_multibyte == 1)
+ offset = Fimbexec (beg, len, &kwsmatch.size[0]);
+ /* For f_i_multibyte, the string at beg now matches first 3 chars of
+ one of the search strings (less if there are shorter search strings).
+ See if this is a real match. */
+ if (f_i_multibyte
+ && Fimbexec (beg, buf + size - beg, &kwsmatch.size[0], exact))
+ goto next_char;
+#endif /* MBS_SUPPORT */
len = kwsmatch.size[0];
if (exact && !match_words)
goto success_in_beg_and_len;
if (match_lines)
{
if (beg > buf && beg[-1] != eol)
- continue;
+ goto next_char;
if (beg + len < buf + size && beg[len] != eol)
- continue;
+ goto next_char;
goto success;
}
else if (match_words)
- for (try = beg; len; )
- {
- if (try > buf && WCHAR((unsigned char) try[-1]))
- break;
- if (try + len < buf + size && WCHAR((unsigned char) try[len]))
- {
- offset = kwsexec (kwset, beg, --len, &kwsmatch);
- if (offset == (size_t) -1)
- {
+ {
+ while (1)
+ {
+ int word_match = 0;
+ if (beg > buf)
+ {
#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
- free (mb_properties);
+ if (mb_cur_max > 1)
+ {
+ const char *s;
+ int mr;
+ wchar_t pwc;
+
+ if (using_utf8)
+ {
+ s = beg - 1;
+ while (s > buf
+ && (unsigned char) *s >= 0x80
+ && (unsigned char) *s <= 0xbf)
+ --s;
+ }
+ else
+ s = last_char;
+ mr = mbtowc (&pwc, s, beg - s);
+ if (mr <= 0)
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ else if ((iswalnum (pwc) || pwc == L'_')
+ && mr == (int) (beg - s))
+ goto next_char;
+ }
+ else
#endif /* MBS_SUPPORT */
- return offset;
- }
- try = beg + offset;
- len = kwsmatch.size[0];
- }
- else
- goto success;
- }
+ if (!WCHAR ((unsigned char) beg[-1]))
+ goto next_char;
+ }
+#ifdef MBS_SUPPORT
+ if (mb_cur_max > 1)
+ {
+ wchar_t nwc;
+ int mr;
+
+ mr = mbtowc (&nwc, beg + len, buf + size - beg - len);
+ if (mr <= 0)
+ {
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ word_match = 1;
+ }
+ else if (!iswalnum (nwc) && nwc != L'_')
+ word_match = 1;
+ }
+ else
+#endif /* MBS_SUPPORT */
offset = kwsexec (kwset, beg, len, &kwsmatch);
+ if (beg + len >= buf + size && !WCHAR ((unsigned char) beg[len]))
+ word_match = 1;
+ if (word_match)
+ {
+ if (!exact)
+ /* Returns the whole line now we know there's a word match. */
+ goto success;
+ else
+ /* Returns just this word match. */
+ goto success_in_beg_and_len;
+ }
+ if (len > 0)
+ {
+ /* Try a shorter length anchored at the same place. */
+ --len;
+ offset = kwsexec (kwset, beg, len, &kwsmatch);
+
if (offset == -1) {
break; /* Try a different anchor. */
}
+ if (offset == -1)
+ goto next_char; /* Try a different anchor. */
+#ifdef MBS_SUPPORT
+ if (MB_CUR_MAX > 1 && !using_utf8)
+ if (mb_cur_max > 1 && !using_utf8)
+ {
+ size_t bytes_left = offset;
+ while (bytes_left)
+ {
+ size_t len = mbrlen (beg, bytes_left, &mbs);
+ if (len == (size_t) -1 || len == 0)
+ size_t mlen = mbrlen (beg, bytes_left, &mbs);
+
+ last_char = beg;
+ if (mlen == (size_t) -1 || mlen == 0)
+ {
+ /* Incomplete character: treat as single-byte. */
+ memset (&mbs, '\0', sizeof (mbstate_t));
@ -583,24 +694,76 @@
+ continue;
+ }
+
+ if (len == (size_t) -2)
+ if (mlen == (size_t) -2)
+ {
+ /* Offset points inside multibyte character:
+ * no good. */
+ break;
+ }
+
+ beg += len;
+ bytes_left -= len;
+ beg += mlen;
+ bytes_left -= mlen;
+ }
+
+ if (bytes_left)
+ break; /* Try a different anchor. */
+ {
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ goto next_char; /* Try a different anchor. */
+ }
+ }
+ else
+#endif /* MBS_SUPPORT */
beg += offset;
len = kwsmatch.size[0];
}
@@ -597,19 +870,31 @@
+ beg += offset;
+#ifdef MBS_SUPPORT
+ /* The string at beg now matches first 3 chars of one of
+ the search strings (less if there are shorter search
+ strings). See if this is a real match. */
+ if (f_i_multibyte
+ && Fimbexec (beg, len - offset, &kwsmatch.size[0],
+ exact))
+ goto next_char;
+#endif /* MBS_SUPPORT */
+ len = kwsmatch.size[0];
+ }
+ }
+ }
else
goto success;
+next_char:;
+#ifdef MBS_SUPPORT
+ /* Advance to next character. For MB_CUR_MAX == 1 case this is handled
+ by ++beg above. */
+ if (mb_cur_max > 1)
+ {
+ if (using_utf8)
+ {
+ unsigned char c = *beg;
+ if (c >= 0xc2)
+ {
+ if (c < 0xe0)
+ ++beg;
+ else if (c < 0xf0)
+ beg += 2;
+ else if (c < 0xf8)
+ beg += 3;
+ else if (c < 0xfc)
+ beg += 4;
+ else if (c < 0xfe)
+ beg += 5;
+ }
+ }
+ else
+ {
+ size_t l = mbrlen (beg, buf + size - beg, &mbs);
+
+ last_char = beg;
+ if (l + 2 >= 2)
+ beg += l - 1;
+ else
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ }
+ }
+#endif /* MBS_SUPPORT */
}
failure:
@ -609,7 +772,7 @@
+ success:
#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
+ if (MB_CUR_MAX > 1 && !using_utf8)
+ if (mb_cur_max > 1 && !using_utf8)
{
- if (match_icase)
- free((char *) buf);
@ -640,7 +803,7 @@
end++;
while (buf < beg && beg[-1] != eol)
--beg;
@@ -618,15 +903,6 @@
@@ -613,15 +1015,6 @@
success_in_beg_and_len:
*match_size = len;

1
grep.spec
View File

@ -86,6 +86,7 @@ fi
%changelog
* Fri Dec 31 2004 Tim Waugh <twaugh@redhat.com>
- Jakub Jelinek's much improved -Fi algorithm.
- Removed bogus part of grep-2.5.1-fgrep patch.
* Tue Dec 21 2004 Tim Waugh <twaugh@redhat.com> 2.5.1-44