freebsd-dev/usr.bin/grep/regex/fastmatch.c
Gabor Kovesdan f20f6f3fdf Update BSD grep to the latest development version. It has some code
backported that was written for the TRE integration project in Google
Summer of Code 2011.  This is a temporary solution until the whole
regex library is not replaced so that BSD grep development can continue
and the backported code gets some review and testing.  This change only
improves scalability slightly, there is no big performance boost yet
but several minor bugs have been found and fixed.

Approved by:	delphij (mentor)
Sposored by:	Google Summer of Code 2011
MFC after:	1 week
2011-10-05 09:56:43 +00:00

170 lines
4.6 KiB
C

/* $FreeBSD$ */
/*-
* Copyright (C) 2011 Gabor Kovesdan <gabor@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "glue.h"
#include <errno.h>
#include <fastmatch.h>
#include <regex.h>
#include <string.h>
#include "tre-fastmatch.h"
#include "xmalloc.h"
int
tre_fixncomp(fastmatch_t *preg, const char *regex, size_t n, int cflags)
{
int ret;
tre_char_t *wregex;
size_t wlen;
if (n != 0)
{
ret = tre_convert_pattern(regex, n, &wregex, &wlen);
if (ret != REG_OK)
return ret;
else
ret = tre_compile_literal(preg, wregex, wlen, cflags);
tre_free_pattern(wregex);
return ret;
}
else
return tre_compile_literal(preg, NULL, 0, cflags);
}
int
tre_fastncomp(fastmatch_t *preg, const char *regex, size_t n, int cflags)
{
int ret;
tre_char_t *wregex;
size_t wlen;
if (n != 0)
{
ret = tre_convert_pattern(regex, n, &wregex, &wlen);
if (ret != REG_OK)
return ret;
else
ret = (cflags & REG_LITERAL)
? tre_compile_literal(preg, wregex, wlen, cflags)
: tre_compile_fast(preg, wregex, wlen, cflags);
tre_free_pattern(wregex);
return ret;
}
else
return tre_compile_literal(preg, NULL, 0, cflags);
}
int
tre_fixcomp(fastmatch_t *preg, const char *regex, int cflags)
{
return tre_fixncomp(preg, regex, regex ? strlen(regex) : 0, cflags);
}
int
tre_fastcomp(fastmatch_t *preg, const char *regex, int cflags)
{
return tre_fastncomp(preg, regex, regex ? strlen(regex) : 0, cflags);
}
int
tre_fixwncomp(fastmatch_t *preg, const wchar_t *regex, size_t n, int cflags)
{
return tre_compile_literal(preg, regex, n, cflags);
}
int
tre_fastwncomp(fastmatch_t *preg, const wchar_t *regex, size_t n, int cflags)
{
return (cflags & REG_LITERAL) ?
tre_compile_literal(preg, regex, n, cflags) :
tre_compile_fast(preg, regex, n, cflags);
}
int
tre_fixwcomp(fastmatch_t *preg, const wchar_t *regex, int cflags)
{
return tre_fixwncomp(preg, regex, regex ? tre_strlen(regex) : 0, cflags);
}
int
tre_fastwcomp(fastmatch_t *preg, const wchar_t *regex, int cflags)
{
return tre_fastwncomp(preg, regex, regex ? tre_strlen(regex) : 0, cflags);
}
void
tre_fastfree(fastmatch_t *preg)
{
tre_free_fast(preg);
}
int
tre_fastnexec(const fastmatch_t *preg, const char *string, size_t len,
size_t nmatch, regmatch_t pmatch[], int eflags)
{
tre_str_type_t type = (TRE_MB_CUR_MAX == 1) ? STR_BYTE : STR_MBS;
if (eflags & REG_STARTEND)
CALL_WITH_OFFSET(tre_match_fast(preg, &string[offset], slen,
type, nmatch, pmatch, eflags));
else
return tre_match_fast(preg, string, len, type, nmatch,
pmatch, eflags);
}
int
tre_fastexec(const fastmatch_t *preg, const char *string, size_t nmatch,
regmatch_t pmatch[], int eflags)
{
return tre_fastnexec(preg, string, (size_t)-1, nmatch, pmatch, eflags);
}
int
tre_fastwnexec(const fastmatch_t *preg, const wchar_t *string, size_t len,
size_t nmatch, regmatch_t pmatch[], int eflags)
{
tre_str_type_t type = STR_WIDE;
if (eflags & REG_STARTEND)
CALL_WITH_OFFSET(tre_match_fast(preg, &string[offset], slen,
type, nmatch, pmatch, eflags));
else
return tre_match_fast(preg, string, len, type, nmatch,
pmatch, eflags);
}
int
tre_fastwexec(const fastmatch_t *preg, const wchar_t *string,
size_t nmatch, regmatch_t pmatch[], int eflags)
{
return tre_fastwnexec(preg, string, (size_t)-1, nmatch, pmatch, eflags);
}