Revert "Switch to PCRE grep." (f9408d5c) · Commits · e / os / android_system_core

shell_and_utilities/README.md

+1 −3

Original line number	Diff line number	Diff line
		@@ -193,14 +193,12 @@ which whoami xargs xxd yes zcat
		Android Q
		---------

		BSD: fsck\_msdos newfs\_msdos
		BSD: grep fsck\_msdos newfs\_msdos

		bzip2: bzcat bzip2 bunzip2

		one-true-awk: awk

		PCRE: egrep fgrep grep

		toolbox: getevent getprop

		toybox: acpi base64 basename blockdev cal cat chcon chgrp chmod chown

toolbox/Android.bp

+17 −0

Original line number	Diff line number	Diff line
		@@ -60,3 +60,20 @@ cc_binary {
		defaults: ["toolbox_defaults"],
		srcs: ["r.c"],
		}

		// We build BSD grep separately (but see http://b/111849261).
		cc_binary {
		name: "grep",
		defaults: ["toolbox_defaults"],
		srcs: [
		"upstream-netbsd/usr.bin/grep/fastgrep.c",
		"upstream-netbsd/usr.bin/grep/file.c",
		"upstream-netbsd/usr.bin/grep/grep.c",
		"upstream-netbsd/usr.bin/grep/queue.c",
		"upstream-netbsd/usr.bin/grep/util.c",
		],

		sanitize: {
		integer_overflow: false,
		},
		}

toolbox/upstream-netbsd/usr.bin/grep/fastgrep.c

0 → 100644

+336 −0

Original line number	Diff line number	Diff line
		/* $OpenBSD: util.c,v 1.36 2007/10/02 17:59:18 otto Exp $ */
		/* $FreeBSD: head/usr.bin/grep/fastgrep.c 211496 2010-08-19 09:28:59Z des $ */

		/*-
		* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
		* Copyright (C) 2008 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.
		*/

		/*
		* XXX: This file is a speed up for grep to cover the defects of the
		* regex library. These optimizations should practically be implemented
		* there keeping this code clean. This is a future TODO, but for the
		* meantime, we need to use this workaround.
		*/

		#if HAVE_NBTOOL_CONFIG_H
		#include "nbtool_config.h"
		#endif

		#include <sys/cdefs.h>
		__RCSID("$NetBSD: fastgrep.c,v 1.5 2011/04/18 03:27:40 joerg Exp $");

		#include <limits.h>
		#include <stdbool.h>
		#include <stdlib.h>
		#include <string.h>
		#include <wchar.h>
		#include <wctype.h>

		#include "grep.h"

		static inline int grep_cmp(const unsigned char , const unsigned char , size_t);
		static inline void grep_revstr(unsigned char *, int);

		void
		fgrepcomp(fastgrep_t fg, const char pat)
		{
		unsigned int i;

		/* Initialize. */
		fg->len = strlen(pat);
		fg->bol = false;
		fg->eol = false;
		fg->reversed = false;

		fg->pattern = (unsigned char *)grep_strdup(pat);

		/* Preprocess pattern. */
		for (i = 0; i <= UCHAR_MAX; i++)
		fg->qsBc[i] = fg->len;
		for (i = 1; i < fg->len; i++)
		fg->qsBc[fg->pattern[i]] = fg->len - i;
		}

		/*
		* Returns: -1 on failure, 0 on success
		*/
		int
		fastcomp(fastgrep_t fg, const char pat)
		{
		unsigned int i;
		int firstHalfDot = -1;
		int firstLastHalfDot = -1;
		int hasDot = 0;
		int lastHalfDot = 0;
		int shiftPatternLen;

		/* Initialize. */
		fg->len = strlen(pat);
		fg->bol = false;
		fg->eol = false;
		fg->reversed = false;
		fg->word = wflag;

		/* Remove end-of-line character ('$'). */
		if (fg->len > 0 && pat[fg->len - 1] == '$') {
		fg->eol = true;
		fg->len--;
		}

		/* Remove beginning-of-line character ('^'). */
		if (pat[0] == '^') {
		fg->bol = true;
		fg->len--;
		pat++;
		}

		if (fg->len >= 14 &&
		memcmp(pat, "[[:<:]]", 7) == 0 &&
		memcmp(pat + fg->len - 7, "[[:>:]]", 7) == 0) {
		fg->len -= 14;
		pat += 7;
		/* Word boundary is handled separately in util.c */
		fg->word = true;
		}

		/*
		* pat has been adjusted earlier to not include '^', '$' or
		* the word match character classes at the beginning and ending
		* of the string respectively.
		*/
		fg->pattern = grep_malloc(fg->len + 1);
		memcpy(fg->pattern, pat, fg->len);
		fg->pattern[fg->len] = '\0';

		/* Look for ways to cheat...er...avoid the full regex engine. */
		for (i = 0; i < fg->len; i++) {
		/* Can still cheat? */
		if (fg->pattern[i] == '.') {
		hasDot = i;
		if (i < fg->len / 2) {
		if (firstHalfDot < 0)
		/* Closest dot to the beginning */
		firstHalfDot = i;
		} else {
		/* Closest dot to the end of the pattern. */
		lastHalfDot = i;
		if (firstLastHalfDot < 0)
		firstLastHalfDot = i;
		}
		} else {
		/* Free memory and let others know this is empty. */
		free(fg->pattern);
		fg->pattern = NULL;
		return (-1);
		}
		}

		/*
		* Determine if a reverse search would be faster based on the placement
		* of the dots.
		*/
		if ((!(lflag \|\| cflag)) && ((!(fg->bol \|\| fg->eol)) &&
		((lastHalfDot) && ((firstHalfDot < 0) \|\|
		((fg->len - (lastHalfDot + 1)) < (size_t)firstHalfDot)))) &&
		!oflag && !color) {
		fg->reversed = true;
		hasDot = fg->len - (firstHalfDot < 0 ?
		firstLastHalfDot : firstHalfDot) - 1;
		grep_revstr(fg->pattern, fg->len);
		}

		/*
		* Normal Quick Search would require a shift based on the position the
		* next character after the comparison is within the pattern. With
		* wildcards, the position of the last dot effects the maximum shift
		* distance.
		* The closer to the end the wild card is the slower the search. A
		* reverse version of this algorithm would be useful for wildcards near
		* the end of the string.
		*
		* Examples:
		* Pattern Max shift
		* ------- ---------
		* this 5
		* .his 4
		* t.is 3
		* th.s 2
		* thi. 1
		*/

		/* Adjust the shift based on location of the last dot ('.'). */
		shiftPatternLen = fg->len - hasDot;

		/* Preprocess pattern. */
		for (i = 0; i <= (signed)UCHAR_MAX; i++)
		fg->qsBc[i] = shiftPatternLen;
		for (i = hasDot + 1; i < fg->len; i++) {
		fg->qsBc[fg->pattern[i]] = fg->len - i;
		}

		/*
		* Put pattern back to normal after pre-processing to allow for easy
		* comparisons later.
		*/
		if (fg->reversed)
		grep_revstr(fg->pattern, fg->len);

		return (0);
		}

		int
		grep_search(fastgrep_t fg, const unsigned char data, size_t len, regmatch_t *pmatch)
		{
		unsigned int j;
		int ret = REG_NOMATCH;

		if (pmatch->rm_so == (ssize_t)len)
		return (ret);

		if (fg->bol && pmatch->rm_so != 0) {
		pmatch->rm_so = len;
		pmatch->rm_eo = len;
		return (ret);
		}

		/* No point in going farther if we do not have enough data. */
		if (len < fg->len)
		return (ret);

		/* Only try once at the beginning or ending of the line. */
		if (fg->bol \|\| fg->eol) {
		/* Simple text comparison. */
		/* Verify data is >= pattern length before searching on it. */
		if (len >= fg->len) {
		/* Determine where in data to start search at. */
		j = fg->eol ? len - fg->len : 0;
		if (!((fg->bol && fg->eol) && (len != fg->len)))
		if (grep_cmp(fg->pattern, data + j,
		fg->len) == -1) {
		pmatch->rm_so = j;
		pmatch->rm_eo = j + fg->len;
		ret = 0;
		}
		}
		} else if (fg->reversed) {
		/* Quick Search algorithm. */
		j = len;
		do {
		if (grep_cmp(fg->pattern, data + j - fg->len,
		fg->len) == -1) {
		pmatch->rm_so = j - fg->len;
		pmatch->rm_eo = j;
		ret = 0;
		break;
		}
		/* Shift if within bounds, otherwise, we are done. */
		if (j == fg->len)
		break;
		j -= fg->qsBc[data[j - fg->len - 1]];
		} while (j >= fg->len);
		} else {
		/* Quick Search algorithm. */
		j = pmatch->rm_so;
		do {
		if (grep_cmp(fg->pattern, data + j, fg->len) == -1) {
		pmatch->rm_so = j;
		pmatch->rm_eo = j + fg->len;
		ret = 0;
		break;
		}

		/* Shift if within bounds, otherwise, we are done. */
		if (j + fg->len == len)
		break;
		else
		j += fg->qsBc[data[j + fg->len]];
		} while (j <= (len - fg->len));
		}

		return (ret);
		}

		/*
		* Returns: i >= 0 on failure (position that it failed)
		* -1 on success
		*/
		static inline int
		grep_cmp(const unsigned char pat, const unsigned char data, size_t len)
		{
		size_t size;
		wchar_t wdata, wpat;
		unsigned int i;

		if (iflag) {
		if ((size = mbstowcs(NULL, (const char *)data, 0)) ==
		((size_t) - 1))
		return (-1);

		wdata = grep_malloc(size * sizeof(wint_t));

		if (mbstowcs(wdata, (const char *)data, size) ==
		((size_t) - 1))
		return (-1);

		if ((size = mbstowcs(NULL, (const char *)pat, 0)) ==
		((size_t) - 1))
		return (-1);

		wpat = grep_malloc(size * sizeof(wint_t));

		if (mbstowcs(wpat, (const char *)pat, size) == ((size_t) - 1))
		return (-1);
		for (i = 0; i < len; i++) {
		if ((towlower(wpat[i]) == towlower(wdata[i])) \|\|
		((grepbehave != GREP_FIXED) && wpat[i] == L'.'))
		continue;
		free(wpat);
		free(wdata);
		return (i);
		}
		} else {
		for (i = 0; i < len; i++) {
		if ((pat[i] == data[i]) \|\| ((grepbehave != GREP_FIXED) &&
		pat[i] == '.'))
		continue;
		return (i);
		}
		}
		return (-1);
		}

		static inline void
		grep_revstr(unsigned char *str, int len)
		{
		int i;
		char c;

		for (i = 0; i < len / 2; i++) {
		c = str[i];
		str[i] = str[len - i - 1];
		str[len - i - 1] = c;
		}
		}

toolbox/upstream-netbsd/usr.bin/grep/file.c

0 → 100644

+271 −0

Original line number	Diff line number	Diff line
		/* $NetBSD: file.c,v 1.7 2011/04/18 22:46:48 joerg Exp $ */
		/* $FreeBSD: head/usr.bin/grep/file.c 211496 2010-08-19 09:28:59Z des $ */
		/* $OpenBSD: file.c,v 1.11 2010/07/02 20:48:48 nicm Exp $ */

		/*-
		* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
		* Copyright (C) 2008-2010 Gabor Kovesdan <gabor@FreeBSD.org>
		* Copyright (C) 2010 Dimitry Andric <dimitry@andric.com>
		* 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.
		*/

		#if HAVE_NBTOOL_CONFIG_H
		#include "nbtool_config.h"
		#endif

		#include <sys/cdefs.h>
		__RCSID("$NetBSD: file.c,v 1.7 2011/04/18 22:46:48 joerg Exp $");

		#include <sys/param.h>
		#include <sys/types.h>
		#include <sys/stat.h>

		#ifndef __ANDROID__
		#include <bzlib.h>
		#endif
		#include <err.h>
		#include <errno.h>
		#include <fcntl.h>
		#include <stddef.h>
		#include <stdlib.h>
		#include <string.h>
		#include <unistd.h>
		#include <wchar.h>
		#include <wctype.h>
		#ifndef __ANDROID__
		#include <zlib.h>
		#endif

		#include "grep.h"

		#define MAXBUFSIZ (32 * 1024)
		#define LNBUFBUMP 80

		#ifndef __ANDROID__
		static gzFile gzbufdesc;
		static BZFILE* bzbufdesc;
		#endif

		static unsigned char buffer[MAXBUFSIZ];
		static unsigned char *bufpos;
		static size_t bufrem;

		static unsigned char *lnbuf;
		static size_t lnbuflen;

		static inline int
		grep_refill(struct file *f)
		{
		ssize_t nr;
		#ifndef __ANDROID__
		int bzerr;
		#endif

		bufpos = buffer;
		bufrem = 0;

		#ifndef __ANDROID__
		if (filebehave == FILE_GZIP)
		nr = gzread(gzbufdesc, buffer, MAXBUFSIZ);
		else if (filebehave == FILE_BZIP && bzbufdesc != NULL) {
		nr = BZ2_bzRead(&bzerr, bzbufdesc, buffer, MAXBUFSIZ);
		switch (bzerr) {
		case BZ_OK:
		case BZ_STREAM_END:
		/* No problem, nr will be okay */
		break;
		case BZ_DATA_ERROR_MAGIC:
		/*
		* As opposed to gzread(), which simply returns the
		* plain file data, if it is not in the correct
		* compressed format, BZ2_bzRead() instead aborts.
		*
		* So, just restart at the beginning of the file again,
		* and use plain reads from now on.
		*/
		BZ2_bzReadClose(&bzerr, bzbufdesc);
		bzbufdesc = NULL;
		if (lseek(f->fd, 0, SEEK_SET) == -1)
		return (-1);
		nr = read(f->fd, buffer, MAXBUFSIZ);
		break;
		default:
		/* Make sure we exit with an error */
		nr = -1;
		}
		} else
		#endif
		nr = read(f->fd, buffer, MAXBUFSIZ);

		if (nr < 0)
		return (-1);

		bufrem = nr;
		return (0);
		}

		static inline int
		grep_lnbufgrow(size_t newlen)
		{

		if (lnbuflen < newlen) {
		lnbuf = grep_realloc(lnbuf, newlen);
		lnbuflen = newlen;
		}

		return (0);
		}

		char *
		grep_fgetln(struct file f, size_t lenp)
		{
		unsigned char *p;
		char *ret;
		size_t len;
		size_t off;
		ptrdiff_t diff;

		/* Fill the buffer, if necessary */
		if (bufrem == 0 && grep_refill(f) != 0)
		goto error;

		if (bufrem == 0) {
		/* Return zero length to indicate EOF */
		*lenp = 0;
		return ((char *)bufpos);
		}

		/* Look for a newline in the remaining part of the buffer */
		if ((p = memchr(bufpos, line_sep, bufrem)) != NULL) {
		++p; /* advance over newline */
		ret = (char *)bufpos;
		len = p - bufpos;
		bufrem -= len;
		bufpos = p;
		*lenp = len;
		return (ret);
		}

		/* We have to copy the current buffered data to the line buffer */
		for (len = bufrem, off = 0; ; len += bufrem) {
		/* Make sure there is room for more data */
		if (grep_lnbufgrow(len + LNBUFBUMP))
		goto error;
		memcpy(lnbuf + off, bufpos, len - off);
		off = len;
		if (grep_refill(f) != 0)
		goto error;
		if (bufrem == 0)
		/* EOF: return partial line */
		break;
		if ((p = memchr(bufpos, line_sep, bufrem)) == NULL)
		continue;
		/* got it: finish up the line (like code above) */
		++p;
		diff = p - bufpos;
		len += diff;
		if (grep_lnbufgrow(len))
		goto error;
		memcpy(lnbuf + off, bufpos, diff);
		bufrem -= diff;
		bufpos = p;
		break;
		}
		*lenp = len;
		return ((char *)lnbuf);

		error:
		*lenp = 0;
		return (NULL);
		}

		static inline struct file *
		grep_file_init(struct file *f)
		{

		#ifndef __ANDROID__
		if (filebehave == FILE_GZIP &&
		(gzbufdesc = gzdopen(f->fd, "r")) == NULL)
		goto error;

		if (filebehave == FILE_BZIP &&
		(bzbufdesc = BZ2_bzdopen(f->fd, "r")) == NULL)
		goto error;
		#endif

		/* Fill read buffer, also catches errors early */
		if (grep_refill(f) != 0)
		goto error;

		/* Check for binary stuff, if necessary */
		if (!nulldataflag && binbehave != BINFILE_TEXT &&
		memchr(bufpos, '\0', bufrem) != NULL)
		f->binary = true;

		return (f);
		error:
		close(f->fd);
		free(f);
		return (NULL);
		}

		/*
		* Opens a file for processing.
		*/
		struct file *
		grep_open(const char *path)
		{
		struct file *f;

		f = grep_malloc(sizeof *f);
		memset(f, 0, sizeof *f);
		if (path == NULL) {
		/* Processing stdin implies --line-buffered. */
		lbflag = true;
		f->fd = STDIN_FILENO;
		} else if ((f->fd = open(path, O_RDONLY)) == -1) {
		free(f);
		return (NULL);
		}

		return (grep_file_init(f));
		}

		/*
		* Closes a file.
		*/
		void
		grep_close(struct file *f)
		{

		close(f->fd);

		/* Reset read buffer and line buffer */
		bufpos = buffer;
		bufrem = 0;

		free(lnbuf);
		lnbuf = NULL;
		lnbuflen = 0;
		}

toolbox/upstream-netbsd/usr.bin/grep/grep.c

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File added.

Preview size limit exceeded, changes collapsed.