toolbox/upstream-netbsd/usr.bin/grep/util.c - third_party/android/platform/system/core - Git at Google

 /*	$NetBSD: util.c,v 1.19 2018/02/05 22:14:26 mrg Exp $	*/
 /*	$FreeBSD: head/usr.bin/grep/util.c 211496 2010-08-19 09:28:59Z des $	*/
 /*	$OpenBSD: util.c,v 1.39 2010/07/02 22:18:03 tedu Exp $	*/

 /*-
  * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
  * Copyright (C) 2008-2010 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.
  */

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

 #include <sys/cdefs.h>
 __RCSID("$NetBSD: util.c,v 1.19 2018/02/05 22:14:26 mrg Exp $");

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

 #include <ctype.h>
 #include <err.h>
 #include <errno.h>
 #include <fnmatch.h>
 #include <fts.h>
 #include <libgen.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <wchar.h>
 #include <wctype.h>

 #include "grep.h"

 static bool	 first, first_global = true;
 static unsigned long long since_printed;

 static int	 procline(struct str *l, int);

 bool
 file_matching(const char *fname)
 {
 	char *fname_base, *fname_copy;
 	unsigned int i;
 	bool ret;

 	ret = finclude ? false : true;
 	fname_copy = grep_strdup(fname);
 	fname_base = basename(fname_copy);

 	for (i = 0; i < fpatterns; ++i) {
 		if (fnmatch(fpattern[i].pat, fname, 0) == 0 ||
 		    fnmatch(fpattern[i].pat, fname_base, 0) == 0) {
 			if (fpattern[i].mode == EXCL_PAT) {
 				free(fname_copy);
 				return (false);
 			} else
 				ret = true;
 		}
 	}
 	free(fname_copy);
 	return (ret);
 }

 static inline bool
 dir_matching(const char *dname)
 {
 	unsigned int i;
 	bool ret;

 	ret = dinclude ? false : true;

 	for (i = 0; i < dpatterns; ++i) {
 		if (dname != NULL &&
 		    fnmatch(dname, dpattern[i].pat, 0) == 0) {
 			if (dpattern[i].mode == EXCL_PAT)
 				return (false);
 			else
 				ret = true;
 		}
 	}
 	return (ret);
 }

 /*
  * Processes a directory when a recursive search is performed with
  * the -R option.  Each appropriate file is passed to procfile().
  */
 int
 grep_tree(char **argv)
 {
 	FTS *fts;
 	FTSENT *p;
 	char *d, *dir = NULL;
 	int c, fts_flags;
 	bool ok;

 	c = fts_flags = 0;

 	switch(linkbehave) {
 	case LINK_EXPLICIT:
 		fts_flags = FTS_COMFOLLOW;
 		break;
 	case LINK_SKIP:
 		fts_flags = FTS_PHYSICAL;
 		break;
 	default:
 		fts_flags = FTS_LOGICAL;

 	}

 	fts_flags |= FTS_NOSTAT | FTS_NOCHDIR;

 	if (!(fts = fts_open(argv, fts_flags, NULL)))
 		err(2, "fts_open");
 	while ((p = fts_read(fts)) != NULL) {
 		switch (p->fts_info) {
 		case FTS_DNR:
 			/* FALLTHROUGH */
 		case FTS_ERR:
 			errx(2, "%s: %s", p->fts_path, strerror(p->fts_errno));
 			break;
 		case FTS_D:
 			/* FALLTHROUGH */
 		case FTS_DP:
 			break;
 		case FTS_DC:
 			/* Print a warning for recursive directory loop */
 			warnx("warning: %s: recursive directory loop",
 				p->fts_path);
 			break;
 		default:
 			/* Check for file exclusion/inclusion */
 			ok = true;
 			if (dexclude || dinclude) {
 				if ((d = strrchr(p->fts_path, '/')) != NULL) {
 					dir = grep_malloc(sizeof(char) *
 					    (d - p->fts_path + 1));
 					memcpy(dir, p->fts_path,
 					    d - p->fts_path);
 					dir[d - p->fts_path] = '\0';
 				}
 				ok = dir_matching(dir);
 				free(dir);
 				dir = NULL;
 			}
 			if (fexclude || finclude)
 				ok &= file_matching(p->fts_path);

 			if (ok)
 				c += procfile(p->fts_path);
 			break;
 		}
 	}

 	fts_close(fts);
 	return (c);
 }

 /*
  * Opens a file and processes it.  Each file is processed line-by-line
  * passing the lines to procline().
  */
 int
 procfile(const char *fn)
 {
 	struct file *f;
 	struct stat sb;
 	struct str ln;
 	mode_t s;
 	int c, t;

 	if (mflag && (mcount <= 0))
 		return (0);

 	if (strcmp(fn, "-") == 0) {
 		fn = label != NULL ? label : getstr(1);
 		f = grep_open(NULL);
 	} else {
 		if (!stat(fn, &sb)) {
 			/* Check if we need to process the file */
 			s = sb.st_mode & S_IFMT;
 			if (s == S_IFDIR && dirbehave == DIR_SKIP)
 				return (0);
 			if ((s == S_IFIFO || s == S_IFCHR || s == S_IFBLK
 				|| s == S_IFSOCK) && devbehave == DEV_SKIP)
 					return (0);
 		}
 		f = grep_open(fn);
 	}
 	if (f == NULL) {
 		if (!sflag)
 			warn("%s", fn);
 		if (errno == ENOENT)
 			notfound = true;
 		return (0);
 	}

 	ln.file = grep_malloc(strlen(fn) + 1);
 	strcpy(ln.file, fn);
 	ln.line_no = 0;
 	ln.len = 0;
 	tail = 0;
 	ln.off = -1;

 	for (first = true, c = 0;  c == 0 || !(lflag || qflag); ) {
 		ln.off += ln.len + 1;
 		if ((ln.dat = grep_fgetln(f, &ln.len)) == NULL || ln.len == 0)
 			break;
 		if (ln.len > 0 && ln.dat[ln.len - 1] == line_sep)
 			--ln.len;
 		ln.line_no++;

 		/* Return if we need to skip a binary file */
 		if (f->binary && binbehave == BINFILE_SKIP) {
 			grep_close(f);
 			free(ln.file);
 			free(f);
 			return (0);
 		}
 		/* Process the file line-by-line */
 		t = procline(&ln, f->binary);
 		c += t;

 		/* Count the matches if we have a match limit */
 		if (mflag) {
 			mcount -= t;
 			if (mcount <= 0)
 				break;
 		}
 	}
 	if (Bflag > 0)
 		clearqueue();
 	grep_close(f);

 	if (cflag) {
 		if (!hflag)
 			printf("%s:", ln.file);
 		printf("%u%c", c, line_sep);
 	}
 	if (lflag && !qflag && c != 0)
 		printf("%s%c", fn, line_sep);
 	if (Lflag && !qflag && c == 0)
 		printf("%s%c", fn, line_sep);
 	if (c && !cflag && !lflag && !Lflag &&
 	    binbehave == BINFILE_BIN && f->binary && !qflag)
 		printf(getstr(8), fn);

 	free(ln.file);
 	free(f);
 	return (c);
 }

 #define iswword(x)	(iswalnum((x)) || (x) == L'_')

 /*
  * Processes a line comparing it with the specified patterns.  Each pattern
  * is looped to be compared along with the full string, saving each and every
  * match, which is necessary to colorize the output and to count the
  * matches.  The matching lines are passed to printline() to display the
  * appropriate output.
  */
 static int
 procline(struct str *l, int nottext)
 {
 	regmatch_t matches[MAX_LINE_MATCHES];
 	regmatch_t pmatch;
 	size_t st = 0;
 	unsigned int i;
 	int c = 0, m = 0, r = 0;

 	/* Loop to process the whole line */
 	while (st <= l->len) {
 		pmatch.rm_so = st;
 		pmatch.rm_eo = l->len;

 		/* Loop to compare with all the patterns */
 		for (i = 0; i < patterns; i++) {
 /*
  * XXX: grep_search() is a workaround for speed up and should be
  * removed in the future.  See fastgrep.c.
  */
 			if (fg_pattern[i].pattern) {
 				r = grep_search(&fg_pattern[i],
 				    (unsigned char *)l->dat,
 				    l->len, &pmatch);
 				r = (r == 0) ? 0 : REG_NOMATCH;
 				st = pmatch.rm_eo;
 			} else {
 				r = regexec(&r_pattern[i], l->dat, 1,
 				    &pmatch, eflags);
 				r = (r == 0) ? 0 : REG_NOMATCH;
 				st = pmatch.rm_eo;
 			}
 			if (r == REG_NOMATCH)
 				continue;
 			/* Check for full match */
 			if (xflag &&
 			    (pmatch.rm_so != 0 ||
 			     (size_t)pmatch.rm_eo != l->len))
 				continue;
 			/* Check for whole word match */
 			if (fg_pattern[i].word && pmatch.rm_so != 0) {
 				wchar_t wbegin, wend;

 				wbegin = wend = L' ';
 				if (pmatch.rm_so != 0 &&
 				    sscanf(&l->dat[pmatch.rm_so - 1],
 				    "%lc", &wbegin) != 1)
 					continue;
 				if ((size_t)pmatch.rm_eo != l->len &&
 				    sscanf(&l->dat[pmatch.rm_eo],
 				    "%lc", &wend) != 1)
 					continue;
 				if (iswword(wbegin) || iswword(wend))
 					continue;
 			}
 			c = 1;
 			if (m < MAX_LINE_MATCHES)
 				matches[m++] = pmatch;
 			/* matches - skip further patterns */
 			if ((color != NULL && !oflag) || qflag || lflag)
 				break;
 		}

 		if (vflag) {
 			c = !c;
 			break;
 		}
 		/* One pass if we are not recording matches */
 		if ((color != NULL && !oflag) || qflag || lflag)
 			break;

 		if (st == (size_t)pmatch.rm_so)
 			break; 	/* No matches */
 	}

 	if (c && binbehave == BINFILE_BIN && nottext)
 		return (c); /* Binary file */

 	/* Dealing with the context */
 	if ((tail || c) && !cflag && !qflag && !lflag && !Lflag) {
 		if (c) {
 			if ((Aflag || Bflag) && !first_global &&
 			    (first || since_printed > Bflag))
 				printf("--\n");
 			tail = Aflag;
 			if (Bflag > 0)
 				printqueue();
 			printline(l, ':', matches, m);
 		} else {
 			printline(l, '-', matches, m);
 			tail--;
 		}
 		first = false;
 		first_global = false;
 		since_printed = 0;
 	} else {
 		if (Bflag)
 			enqueue(l);
 		since_printed++;
 	}
 	return (c);
 }

 /*
  * Safe malloc() for internal use.
  */
 void *
 grep_malloc(size_t size)
 {
 	void *ptr;

 	if ((ptr = malloc(size)) == NULL)
 		err(2, "malloc");
 	return (ptr);
 }

 /*
  * Safe calloc() for internal use.
  */
 void *
 grep_calloc(size_t nmemb, size_t size)
 {
 	void *ptr;

 	if ((ptr = calloc(nmemb, size)) == NULL)
 		err(2, "calloc");
 	return (ptr);
 }

 /*
  * Safe realloc() for internal use.
  */
 void *
 grep_realloc(void *ptr, size_t size)
 {

 	if ((ptr = realloc(ptr, size)) == NULL)
 		err(2, "realloc");
 	return (ptr);
 }

 /*
  * Safe strdup() for internal use.
  */
 char *
 grep_strdup(const char *str)
 {
 	char *ret;

 	if ((ret = strdup(str)) == NULL)
 		err(2, "strdup");
 	return (ret);
 }

 /*
  * Prints a matching line according to the command line options.
  */
 void
 printline(struct str *line, int sep, regmatch_t *matches, int m)
 {
 	size_t a = 0;
 	int i, n = 0;

 	if (!hflag) {
 		if (nullflag == 0)
 			fputs(line->file, stdout);
 		else {
 			printf("%s", line->file);
 			putchar(0);
 		}
 		++n;
 	}
 	if (nflag) {
 		if (n > 0)
 			putchar(sep);
 		printf("%d", line->line_no);
 		++n;
 	}
 	if (bflag) {
 		if (n > 0)
 			putchar(sep);
 		printf("%lld", (long long)line->off);
 		++n;
 	}
 	if (n)
 		putchar(sep);
 	/* --color and -o */
 	if ((oflag || color) && m > 0) {
 		for (i = 0; i < m; i++) {
 			if (!oflag)
 				fwrite(line->dat + a, matches[i].rm_so - a, 1,
 				    stdout);
 			if (color)
 				fprintf(stdout, "\33[%sm\33[K", color);

 			fwrite(line->dat + matches[i].rm_so,
 			    matches[i].rm_eo - matches[i].rm_so, 1,
 			    stdout);

 			if (color)
 				fprintf(stdout, "\33[m\33[K");
 			a = matches[i].rm_eo;
 			if (oflag)
 				putchar('\n');
 		}
 		if (!oflag) {
 			if (line->len - a > 0)
 				fwrite(line->dat + a, line->len - a, 1, stdout);
 			putchar(line_sep);
 		}
 	} else {
 		fwrite(line->dat, line->len, 1, stdout);
 		putchar(line_sep);
 	}
 }
	/* $NetBSD: util.c,v 1.19 2018/02/05 22:14:26 mrg Exp $ */
	/* $FreeBSD: head/usr.bin/grep/util.c 211496 2010-08-19 09:28:59Z des $ */
	/* $OpenBSD: util.c,v 1.39 2010/07/02 22:18:03 tedu Exp $ */

	/*-
	* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
	* Copyright (C) 2008-2010 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.
	*/

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

	#include <sys/cdefs.h>
	__RCSID("$NetBSD: util.c,v 1.19 2018/02/05 22:14:26 mrg Exp $");

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

	#include <ctype.h>
	#include <err.h>
	#include <errno.h>
	#include <fnmatch.h>
	#include <fts.h>
	#include <libgen.h>
	#include <stdbool.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <wchar.h>
	#include <wctype.h>

	#include "grep.h"

	static bool first, first_global = true;
	static unsigned long long since_printed;

	static int procline(struct str *l, int);

	bool
	file_matching(const char *fname)
	{
	char fname_base, fname_copy;
	unsigned int i;
	bool ret;

	ret = finclude ? false : true;
	fname_copy = grep_strdup(fname);
	fname_base = basename(fname_copy);

	for (i = 0; i < fpatterns; ++i) {
	if (fnmatch(fpattern[i].pat, fname, 0) == 0 \|\|
	fnmatch(fpattern[i].pat, fname_base, 0) == 0) {
	if (fpattern[i].mode == EXCL_PAT) {
	free(fname_copy);
	return (false);
	} else
	ret = true;
	}
	}
	free(fname_copy);
	return (ret);
	}

	static inline bool
	dir_matching(const char *dname)
	{
	unsigned int i;
	bool ret;

	ret = dinclude ? false : true;

	for (i = 0; i < dpatterns; ++i) {
	if (dname != NULL &&
	fnmatch(dname, dpattern[i].pat, 0) == 0) {
	if (dpattern[i].mode == EXCL_PAT)
	return (false);
	else
	ret = true;
	}
	}
	return (ret);
	}

	/*
	* Processes a directory when a recursive search is performed with
	* the -R option. Each appropriate file is passed to procfile().
	*/
	int
	grep_tree(char **argv)
	{
	FTS *fts;
	FTSENT *p;
	char d, dir = NULL;
	int c, fts_flags;
	bool ok;

	c = fts_flags = 0;

	switch(linkbehave) {
	case LINK_EXPLICIT:
	fts_flags = FTS_COMFOLLOW;
	break;
	case LINK_SKIP:
	fts_flags = FTS_PHYSICAL;
	break;
	default:
	fts_flags = FTS_LOGICAL;

	}

	fts_flags \|= FTS_NOSTAT \| FTS_NOCHDIR;

	if (!(fts = fts_open(argv, fts_flags, NULL)))
	err(2, "fts_open");
	while ((p = fts_read(fts)) != NULL) {
	switch (p->fts_info) {
	case FTS_DNR:
	/* FALLTHROUGH */
	case FTS_ERR:
	errx(2, "%s: %s", p->fts_path, strerror(p->fts_errno));
	break;
	case FTS_D:
	/* FALLTHROUGH */
	case FTS_DP:
	break;
	case FTS_DC:
	/* Print a warning for recursive directory loop */
	warnx("warning: %s: recursive directory loop",
	p->fts_path);
	break;
	default:
	/* Check for file exclusion/inclusion */
	ok = true;
	if (dexclude \|\| dinclude) {
	if ((d = strrchr(p->fts_path, '/')) != NULL) {
	dir = grep_malloc(sizeof(char) *
	(d - p->fts_path + 1));
	memcpy(dir, p->fts_path,
	d - p->fts_path);
	dir[d - p->fts_path] = '\0';
	}
	ok = dir_matching(dir);
	free(dir);
	dir = NULL;
	}
	if (fexclude \|\| finclude)
	ok &= file_matching(p->fts_path);

	if (ok)
	c += procfile(p->fts_path);
	break;
	}
	}

	fts_close(fts);
	return (c);
	}

	/*
	* Opens a file and processes it. Each file is processed line-by-line
	* passing the lines to procline().
	*/
	int
	procfile(const char *fn)
	{
	struct file *f;
	struct stat sb;
	struct str ln;
	mode_t s;
	int c, t;

	if (mflag && (mcount <= 0))
	return (0);

	if (strcmp(fn, "-") == 0) {
	fn = label != NULL ? label : getstr(1);
	f = grep_open(NULL);
	} else {
	if (!stat(fn, &sb)) {
	/* Check if we need to process the file */
	s = sb.st_mode & S_IFMT;
	if (s == S_IFDIR && dirbehave == DIR_SKIP)
	return (0);
	if ((s == S_IFIFO \|\| s == S_IFCHR \|\| s == S_IFBLK
	\|\| s == S_IFSOCK) && devbehave == DEV_SKIP)
	return (0);
	}
	f = grep_open(fn);
	}
	if (f == NULL) {
	if (!sflag)
	warn("%s", fn);
	if (errno == ENOENT)
	notfound = true;
	return (0);
	}

	ln.file = grep_malloc(strlen(fn) + 1);
	strcpy(ln.file, fn);
	ln.line_no = 0;
	ln.len = 0;
	tail = 0;
	ln.off = -1;

	for (first = true, c = 0; c == 0 \|\| !(lflag \|\| qflag); ) {
	ln.off += ln.len + 1;
	if ((ln.dat = grep_fgetln(f, &ln.len)) == NULL \|\| ln.len == 0)
	break;
	if (ln.len > 0 && ln.dat[ln.len - 1] == line_sep)
	--ln.len;
	ln.line_no++;

	/* Return if we need to skip a binary file */
	if (f->binary && binbehave == BINFILE_SKIP) {
	grep_close(f);
	free(ln.file);
	free(f);
	return (0);
	}
	/* Process the file line-by-line */
	t = procline(&ln, f->binary);
	c += t;

	/* Count the matches if we have a match limit */
	if (mflag) {
	mcount -= t;
	if (mcount <= 0)
	break;
	}
	}
	if (Bflag > 0)
	clearqueue();
	grep_close(f);

	if (cflag) {
	if (!hflag)
	printf("%s:", ln.file);
	printf("%u%c", c, line_sep);
	}
	if (lflag && !qflag && c != 0)
	printf("%s%c", fn, line_sep);
	if (Lflag && !qflag && c == 0)
	printf("%s%c", fn, line_sep);
	if (c && !cflag && !lflag && !Lflag &&
	binbehave == BINFILE_BIN && f->binary && !qflag)
	printf(getstr(8), fn);

	free(ln.file);
	free(f);
	return (c);
	}

	#define iswword(x) (iswalnum((x)) \|\| (x) == L'_')

	/*
	* Processes a line comparing it with the specified patterns. Each pattern
	* is looped to be compared along with the full string, saving each and every
	* match, which is necessary to colorize the output and to count the
	* matches. The matching lines are passed to printline() to display the
	* appropriate output.
	*/
	static int
	procline(struct str *l, int nottext)
	{
	regmatch_t matches[MAX_LINE_MATCHES];
	regmatch_t pmatch;
	size_t st = 0;
	unsigned int i;
	int c = 0, m = 0, r = 0;

	/* Loop to process the whole line */
	while (st <= l->len) {
	pmatch.rm_so = st;
	pmatch.rm_eo = l->len;

	/* Loop to compare with all the patterns */
	for (i = 0; i < patterns; i++) {
	/*
	* XXX: grep_search() is a workaround for speed up and should be
	* removed in the future. See fastgrep.c.
	*/
	if (fg_pattern[i].pattern) {
	r = grep_search(&fg_pattern[i],
	(unsigned char *)l->dat,
	l->len, &pmatch);
	r = (r == 0) ? 0 : REG_NOMATCH;
	st = pmatch.rm_eo;
	} else {
	r = regexec(&r_pattern[i], l->dat, 1,
	&pmatch, eflags);
	r = (r == 0) ? 0 : REG_NOMATCH;
	st = pmatch.rm_eo;
	}
	if (r == REG_NOMATCH)
	continue;
	/* Check for full match */
	if (xflag &&
	(pmatch.rm_so != 0 \|\|
	(size_t)pmatch.rm_eo != l->len))
	continue;
	/* Check for whole word match */
	if (fg_pattern[i].word && pmatch.rm_so != 0) {
	wchar_t wbegin, wend;

	wbegin = wend = L' ';
	if (pmatch.rm_so != 0 &&
	sscanf(&l->dat[pmatch.rm_so - 1],
	"%lc", &wbegin) != 1)
	continue;
	if ((size_t)pmatch.rm_eo != l->len &&
	sscanf(&l->dat[pmatch.rm_eo],
	"%lc", &wend) != 1)
	continue;
	if (iswword(wbegin) \|\| iswword(wend))
	continue;
	}
	c = 1;
	if (m < MAX_LINE_MATCHES)
	matches[m++] = pmatch;
	/* matches - skip further patterns */
	if ((color != NULL && !oflag) \|\| qflag \|\| lflag)
	break;
	}

	if (vflag) {
	c = !c;
	break;
	}
	/* One pass if we are not recording matches */
	if ((color != NULL && !oflag) \|\| qflag \|\| lflag)
	break;

	if (st == (size_t)pmatch.rm_so)
	break; /* No matches */
	}

	if (c && binbehave == BINFILE_BIN && nottext)
	return (c); /* Binary file */

	/* Dealing with the context */
	if ((tail \|\| c) && !cflag && !qflag && !lflag && !Lflag) {
	if (c) {
	if ((Aflag \|\| Bflag) && !first_global &&
	(first \|\| since_printed > Bflag))
	printf("--\n");
	tail = Aflag;
	if (Bflag > 0)
	printqueue();
	printline(l, ':', matches, m);
	} else {
	printline(l, '-', matches, m);
	tail--;
	}
	first = false;
	first_global = false;
	since_printed = 0;
	} else {
	if (Bflag)
	enqueue(l);
	since_printed++;
	}
	return (c);
	}

	/*
	* Safe malloc() for internal use.
	*/
	void *
	grep_malloc(size_t size)
	{
	void *ptr;

	if ((ptr = malloc(size)) == NULL)
	err(2, "malloc");
	return (ptr);
	}

	/*
	* Safe calloc() for internal use.
	*/
	void *
	grep_calloc(size_t nmemb, size_t size)
	{
	void *ptr;

	if ((ptr = calloc(nmemb, size)) == NULL)
	err(2, "calloc");
	return (ptr);
	}

	/*
	* Safe realloc() for internal use.
	*/
	void *
	grep_realloc(void *ptr, size_t size)
	{

	if ((ptr = realloc(ptr, size)) == NULL)
	err(2, "realloc");
	return (ptr);
	}

	/*
	* Safe strdup() for internal use.
	*/
	char *
	grep_strdup(const char *str)
	{
	char *ret;

	if ((ret = strdup(str)) == NULL)
	err(2, "strdup");
	return (ret);
	}

	/*
	* Prints a matching line according to the command line options.
	*/
	void
	printline(struct str line, int sep, regmatch_t matches, int m)
	{
	size_t a = 0;
	int i, n = 0;

	if (!hflag) {
	if (nullflag == 0)
	fputs(line->file, stdout);
	else {
	printf("%s", line->file);
	putchar(0);
	}
	++n;
	}
	if (nflag) {
	if (n > 0)
	putchar(sep);
	printf("%d", line->line_no);
	++n;
	}
	if (bflag) {
	if (n > 0)
	putchar(sep);
	printf("%lld", (long long)line->off);
	++n;
	}
	if (n)
	putchar(sep);
	/* --color and -o */
	if ((oflag \|\| color) && m > 0) {
	for (i = 0; i < m; i++) {
	if (!oflag)
	fwrite(line->dat + a, matches[i].rm_so - a, 1,
	stdout);
	if (color)
	fprintf(stdout, "\33[%sm\33[K", color);

	fwrite(line->dat + matches[i].rm_so,
	matches[i].rm_eo - matches[i].rm_so, 1,
	stdout);

	if (color)
	fprintf(stdout, "\33[m\33[K");
	a = matches[i].rm_eo;
	if (oflag)
	putchar('\n');
	}
	if (!oflag) {
	if (line->len - a > 0)
	fwrite(line->dat + a, line->len - a, 1, stdout);
	putchar(line_sep);
	}
	} else {
	fwrite(line->dat, line->len, 1, stdout);
	putchar(line_sep);
	}
	}