/*      $NetBSD: grep.h,v 1.5 2011/02/27 17:33:37 joerg Exp $   */
/*      $OpenBSD: grep.h,v 1.15 2010/04/05 03:03:55 tedu Exp $  */

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 1999 James Howard and Dag-Erling Smørgrav
 * Copyright (c) 2008-2009 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 <bzlib.h>
#include <limits.h>
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <zlib.h>

extern const char               *errstr[];

#define VERSION         "2.6.0-FreeBSD"

#define GREP_FIXED      0
#define GREP_BASIC      1
#define GREP_EXTENDED   2

#if !defined(REG_NOSPEC) && !defined(REG_LITERAL)
#define WITH_INTERNAL_NOSPEC
#endif

#define BINFILE_BIN     0
#define BINFILE_SKIP    1
#define BINFILE_TEXT    2

#define FILE_STDIO      0
#define FILE_MMAP       1

#define DIR_READ        0
#define DIR_SKIP        1
#define DIR_RECURSE     2

#define DEV_READ        0
#define DEV_SKIP        1

#define LINK_READ       0
#define LINK_EXPLICIT   1
#define LINK_SKIP       2

#define EXCL_PAT        0
#define INCL_PAT        1

#define MAX_MATCHES     32

struct file {
        int              fd;
        bool             binary;
};

struct str {
        off_t            boff;
        off_t            off;
        size_t           len;
        char            *dat;
        char            *file;
        int              line_no;
};

struct pat {
        char            *pat;
        int              len;
};

struct epat {
        char            *pat;
        int              mode;
};

/*
 * Parsing context; used to hold things like matches made and
 * other useful bits
 */
struct parsec {
        regmatch_t      matches[MAX_MATCHES];           /* Matches made */
        /* XXX TODO: This should be a chunk, not a line */
        struct str      ln;                             /* Current line */
        size_t          lnstart;                        /* Position in line */
        size_t          matchidx;                       /* Latest match index */
        int             printed;                        /* Metadata printed? */
        bool            binary;                         /* Binary file? */
        bool            cntlines;                       /* Count lines? */
};

/* Flags passed to regcomp() and regexec() */
extern int       cflags, eflags;

/* Command line flags */
extern bool      Eflag, Fflag, Gflag, Hflag, Lflag,
                 bflag, cflag, hflag, iflag, lflag, mflag, nflag, oflag,
                 qflag, sflag, vflag, wflag, xflag;
extern bool      dexclude, dinclude, fexclude, finclude, lbflag, nullflag;
extern long long Aflag, Bflag;
extern long long mcount;
extern long long mlimit;
extern char      fileeol;
extern char     *label;
extern const char *color;
extern int       binbehave, devbehave, dirbehave, filebehave, grepbehave, linkbehave;

extern bool      file_err, matchall;
extern unsigned int dpatterns, fpatterns, patterns;
extern struct pat *pattern;
extern struct epat *dpattern, *fpattern;
extern regex_t  *er_pattern, *r_pattern;

/* For regex errors  */
#define RE_ERROR_BUF    512
extern char      re_error[RE_ERROR_BUF + 1];    /* Seems big enough */

/* util.c */
bool     file_matching(const char *fname);
bool     procfile(const char *fn);
bool     grep_tree(char **argv);
void    *grep_malloc(size_t size);
void    *grep_calloc(size_t nmemb, size_t size);
void    *grep_realloc(void *ptr, size_t size);
char    *grep_strdup(const char *str);
void     grep_printline(struct str *line, int sep);

/* queue.c */
void     initqueue(void);
bool     enqueue(struct str *x);
void     printqueue(void);
void     clearqueue(void);

/* file.c */
void             grep_close(struct file *f);
struct file     *grep_open(const char *path);
char            *grep_fgetln(struct file *f, struct parsec *pc);