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grep/grep-2.5.1-egf-speedup.patch

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--- 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
+#include <assert.h>
#include <sys/types.h>
#if defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H && defined HAVE_MBRTOWC
/* We can handle multibyte string. */
@@ -39,6 +43,9 @@
#ifdef HAVE_LIBPCRE
# include <pcre.h>
#endif
+#ifdef HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
#define NCHAR (UCHAR_MAX + 1)
@@ -70,9 +77,10 @@
call the regexp matcher at all. */
static int kwset_exact_matches;
-#if defined(MBS_SUPPORT)
-static char* check_multibyte_string PARAMS ((char const *buf, size_t size));
-#endif
+/* UTF-8 encoding allows some optimizations that we can't otherwise
+ assume in a multibyte encoding. */
+static int using_utf8;
+
static void kwsinit PARAMS ((void));
static void kwsmusts PARAMS ((void));
static void Gcompile PARAMS ((char const *, size_t));
@@ -84,6 +92,15 @@
static size_t Pexecute PARAMS ((char const *, size_t, size_t *, int));
void
+check_utf8 (void)
+{
+#ifdef HAVE_LANGINFO_CODESET
+ if (strcmp (nl_langinfo (CODESET), "UTF-8") == 0)
+ using_utf8 = 1;
+#endif
+}
+
+void
dfaerror (char const *mesg)
{
error (2, 0, mesg);
@@ -141,47 +158,6 @@
}
}
-#ifdef MBS_SUPPORT
-/* This function allocate the array which correspond to "buf".
- Then this check multibyte string and mark on the positions which
- are not singlebyte character nor the first byte of a multibyte
- character. Caller must free the array. */
-static char*
-check_multibyte_string(char const *buf, size_t size)
-{
- char *mb_properties = xmalloc(size);
- mbstate_t cur_state;
- wchar_t wc;
- int i;
- memset(&cur_state, 0, sizeof(mbstate_t));
- memset(mb_properties, 0, sizeof(char)*size);
- for (i = 0; i < size ;)
- {
- size_t mbclen;
- mbclen = mbrtowc(&wc, buf + i, size - i, &cur_state);
-
- if (mbclen == (size_t) -1 || mbclen == (size_t) -2 || mbclen == 0)
- {
- /* An invalid sequence, or a truncated multibyte character.
- We treat it as a singlebyte character. */
- mbclen = 1;
- }
- else if (match_icase)
- {
- if (iswupper((wint_t)wc))
- {
- wc = towlower((wint_t)wc);
- wcrtomb(buf + i, wc, &cur_state);
- }
- }
- mb_properties[i] = mbclen;
- i += mbclen;
- }
-
- return mb_properties;
-}
-#endif
-
static void
Gcompile (char const *pattern, size_t size)
{
@@ -190,6 +166,7 @@
size_t total = size;
char const *motif = pattern;
+ check_utf8 ();
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 +243,7 @@
size_t total = size;
char const *motif = pattern;
+ check_utf8 ();
if (strcmp (matcher, "awk") == 0)
{
re_set_syntax (RE_SYNTAX_AWK | (match_icase ? RE_ICASE : 0));
@@ -350,18 +328,8 @@
struct kwsmatch kwsm;
size_t i, ret_val;
#ifdef MBS_SUPPORT
- char *mb_properties = NULL;
- if (MB_CUR_MAX > 1)
- {
- if (match_icase)
- {
- char *case_buf = xmalloc(size);
- memcpy(case_buf, buf, size);
- buf = case_buf;
- }
- if (kwset)
- mb_properties = check_multibyte_string(buf, size);
- }
+ mbstate_t mbs;
+ memset (&mbs, '\0', sizeof (mbstate_t));
#endif /* MBS_SUPPORT */
buflim = buf + size;
@@ -373,21 +341,63 @@
if (kwset)
{
/* Find a possible match using the KWset matcher. */
- size_t offset = kwsexec (kwset, beg, buflim - beg, &kwsm);
+#ifdef MBS_SUPPORT
+ size_t bytes_left = 0;
+#endif /* MBS_SUPPORT */
+ size_t offset;
+#ifdef MBS_SUPPORT
+ /* kwsexec doesn't work with match_icase and multibyte input. */
+ if (match_icase && MB_CUR_MAX > 1)
+ /* Avoid kwset */
+ offset = 0;
+ else
+#endif /* MBS_SUPPORT */
+ offset = kwsexec (kwset, beg, buflim - beg, &kwsm);
if (offset == (size_t) -1)
goto failure;
+#ifdef MBS_SUPPORT
+ if (MB_CUR_MAX > 1 && !using_utf8)
+ {
+ bytes_left = offset;
+ while (bytes_left)
+ {
+ size_t len = mbrlen (beg, bytes_left, &mbs);
+ if (len == (size_t) -1 || len == 0)
+ {
+ /* Incomplete character: treat as single-byte. */
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ beg++;
+ bytes_left--;
+ continue;
+ }
+
+ if (len == (size_t) -2)
+ /* Offset points inside multibyte character:
+ * no good. */
+ break;
+
+ beg += len;
+ bytes_left -= len;
+ }
+ }
+ else
+#endif /* MBS_SUPPORT */
beg += offset;
/* Narrow down to the line containing the candidate, and
run it through DFA. */
end = memchr(beg, eol, buflim - beg);
end++;
#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1 && mb_properties[beg - buf] == 0)
+ if (MB_CUR_MAX > 1 && bytes_left)
continue;
-#endif
+#endif /* MBS_SUPPORT */
while (beg > buf && beg[-1] != eol)
--beg;
- if (kwsm.index < kwset_exact_matches)
+ if (
+#ifdef MBS_SUPPORT
+ !(match_icase && MB_CUR_MAX > 1) &&
+#endif /* MBS_SUPPORT */
+ (kwsm.index < kwset_exact_matches))
goto success_in_beg_and_end;
if (dfaexec (&dfa, beg, end - beg, &backref) == (size_t) -1)
continue;
@@ -395,13 +405,47 @@
else
{
/* No good fixed strings; start with DFA. */
+#ifdef MBS_SUPPORT
+ size_t bytes_left = 0;
+#endif /* MBS_SUPPORT */
size_t offset = dfaexec (&dfa, beg, buflim - beg, &backref);
if (offset == (size_t) -1)
break;
/* Narrow down to the line we've found. */
+#ifdef MBS_SUPPORT
+ if (MB_CUR_MAX > 1 && !using_utf8)
+ {
+ bytes_left = offset;
+ while (bytes_left)
+ {
+ size_t len = mbrlen (beg, bytes_left, &mbs);
+ if (len == (size_t) -1 || len == 0)
+ {
+ /* Incomplete character: treat as single-byte. */
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ beg++;
+ bytes_left--;
+ continue;
+ }
+
+ if (len == (size_t) -2)
+ /* Offset points inside multibyte character:
+ * no good. */
+ break;
+
+ beg += len;
+ bytes_left -= len;
+ }
+ }
+ else
+#endif /* MBS_SUPPORT */
beg += offset;
end = memchr (beg, eol, buflim - beg);
end++;
+#ifdef MBS_SUPPORT
+ if (MB_CUR_MAX > 1 && bytes_left)
+ continue;
+#endif /* MBS_SUPPORT */
while (beg > buf && beg[-1] != eol)
--beg;
}
@@ -469,15 +513,6 @@
} /* for (beg = end ..) */
failure:
-#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
- {
- if (mb_properties)
- free (mb_properties);
- if (match_icase)
- free ((char *) buf);
- }
-#endif /* MBS_SUPPORT */
return (size_t) -1;
success_in_beg_and_end:
@@ -486,24 +521,143 @@
/* FALLTHROUGH */
success_in_start_and_len:
-#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
- {
- if (mb_properties)
- free (mb_properties);
- if (match_icase)
- free ((char *) buf);
- }
-#endif /* MBS_SUPPORT */
*match_size = len;
return start;
}
+#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)
{
char const *beg, *lim, *err;
+ check_utf8 ();
+#ifdef MBS_SUPPORT
+ /* Support -F -i for UTF-8 input. */
+ if (match_icase && MB_CUR_MAX > 1)
+ {
+ mbstate_t mbs;
+ 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;
+
+ memset (&mbs, '\0', sizeof (mbs));
+# ifdef __GNU_LIBRARY__
+ wcsize = mbsnrtowcs (wcpattern, &patternend, size, size, &mbs);
+ if (patternend != pattern + size)
+ wcsize = (size_t) -1;
+# else
+ {
+ 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);
+ }
+# endif
+ if (wcsize + 2 <= 2)
+ {
+fimb_fail:
+ free (wcpattern);
+ free (starts);
+ if (fimb_kwset)
+ kwsfree (fimb_kwset);
+ free (Fimb.patterns);
+ Fimb.patterns = NULL;
+ }
+ else
+ {
+ if (!(fimb_kwset = kwsalloc (NULL)))
+ error (2, 0, _("memory exhausted"));
+
+ starts = xmalloc (MB_CUR_MAX * 3);
+ wcbeg = wcpattern;
+ do
+ {
+ int i;
+ size_t wclen;
+
+ 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 */
+
+
kwsinit ();
beg = pattern;
do
@@ -522,6 +676,76 @@
error (2, 0, err);
}
+#ifdef MBS_SUPPORT
+static int
+Fimbexec (const char *buf, size_t size, size_t *plen, int exact)
+{
+ 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));
+ memset (Fimb.match, '\1', Fimb.count);
+ letter = len = 0;
+ patterns_left = 1;
+ while (patterns_left && len <= size)
+ {
+ size_t c;
+
+ patterns_left = 0;
+ if (len < size)
+ {
+ c = mbrtowc (&wc, buf + len, size - len, &mbs);
+ if (c + 2 <= 2)
+ return ret;
+
+ wc = towlower (wc);
+ }
+ else
+ {
+ c = 1;
+ wc = L'\0';
+ }
+
+ for (i = 0; i < Fimb.count; i++)
+ {
+ if (Fimb.match[i])
+ {
+ if (Fimb.patterns[i][letter] == L'\0')
+ {
+ /* Found a match. */
+ *plen = len;
+ if (!exact && !match_words)
+ return 0;
+ else
+ {
+ /* For -w or exact look for longest match. */
+ ret = 0;
+ Fimb.match[i] = '\0';
+ continue;
+ }
+ }
+
+ if (Fimb.patterns[i][letter] == wc)
+ patterns_left = 1;
+ else
+ Fimb.match[i] = '\0';
+ }
+ }
+
+ len += c;
+ letter++;
+ }
+
+ return ret;
+}
+#endif /* MBS_SUPPORT */
+
static size_t
Fexecute (char const *buf, size_t size, size_t *match_size, int exact)
{
@@ -531,80 +755,258 @@
struct kwsmatch kwsmatch;
size_t ret_val;
#ifdef MBS_SUPPORT
- char *mb_properties = NULL;
- if (MB_CUR_MAX > 1)
- {
- if (match_icase)
- {
- char *case_buf = xmalloc(size);
- memcpy(case_buf, buf, size);
- buf = case_buf;
- }
- 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;
+ offset = kwsexec (kwset, beg, buf + size - beg, &kwsmatch);
+
if (offset == (size_t) -1)
goto failure;
#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)
+ {
+ size_t bytes_left = offset;
+ while (bytes_left)
+ {
+ 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));
+ beg++;
+ bytes_left--;
+ continue;
+ }
+
+ if (mlen == (size_t) -2)
+ /* Offset points inside multibyte character: no good. */
+ break;
+
+ beg += mlen;
+ bytes_left -= mlen;
+ }
+
+ if (bytes_left)
+ continue;
+ }
+ else
#endif /* MBS_SUPPORT */
beg += offset;
+#ifdef MBS_SUPPORT
+ /* 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 */
+ 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)
+ goto next_char; /* Try a different anchor. */
+#ifdef MBS_SUPPORT
+ if (mb_cur_max > 1 && !using_utf8)
+ {
+ size_t bytes_left = offset;
+ while (bytes_left)
+ {
+ 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));
+ beg++;
+ bytes_left--;
+ continue;
+ }
+
+ if (mlen == (size_t) -2)
+ {
+ /* Offset points inside multibyte character:
+ * no good. */
+ break;
+ }
+
+ beg += mlen;
+ bytes_left -= mlen;
+ }
+
+ if (bytes_left)
+ {
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ goto next_char; /* Try a different anchor. */
+ }
+ }
+ else
+#endif /* MBS_SUPPORT */
+ 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:
+ return -1;
+
+ success:
#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
+ if (mb_cur_max > 1 && !using_utf8)
{
- if (match_icase)
- free((char *) buf);
- if (mb_properties)
- free(mb_properties);
+ end = beg + len;
+ while (end < buf + size)
+ {
+ size_t len = mbrlen (end, buf + size - end, &mbs);
+ if (len == (size_t) -1 || len == (size_t) -2 || len == 0)
+ {
+ memset (&mbs, '\0', sizeof (mbstate_t));
+ len = 1;
+ }
+ if (len == 1 && *end == eol)
+ break;
+
+ end += len;
+ }
}
+ else
#endif /* MBS_SUPPORT */
- return -1;
-
- success:
end = memchr (beg + len, eol, (buf + size) - (beg + len));
+
end++;
while (buf < beg && beg[-1] != eol)
--beg;
@@ -613,15 +1015,6 @@
success_in_beg_and_len:
*match_size = len;
-#ifdef MBS_SUPPORT
- if (MB_CUR_MAX > 1)
- {
- if (mb_properties)
- free (mb_properties);
- if (match_icase)
- free ((char *) buf);
- }
-#endif /* MBS_SUPPORT */
return beg - buf;
}
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