/*      $OpenBSD: grep.h,v 1.29 2022/06/26 10:57:36 op Exp $    */

/*-
 * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
 * 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 <sys/types.h>
#include <sys/stat.h>

#include <limits.h>
#include <regex.h>
#include <stdint.h>
#include <stdio.h>
#include <zlib.h>

#define VER_MAJ 0
#define VER_MIN 9

#define BIN_FILE_BIN    0
#define BIN_FILE_SKIP   1
#define BIN_FILE_TEXT   2

typedef struct {
        size_t           len;
        long long        line_no;
        off_t            off;
        char            *file;
        char            *dat;
} str_t;

typedef struct {
        unsigned char   *pattern;
        int              patternLen;
        int              qsBc[UCHAR_MAX + 1];
        /* flags */
        int              bol;
        int              eol;
        int              wmatch;
        int              reversedSearch;
} fastgrep_t;

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

/* Command line flags */
extern int       Aflag, Bflag, Eflag, Fflag, Hflag, Lflag,
                 Rflag, Zflag,
                 bflag, cflag, hflag, iflag, lflag, mflag, nflag, oflag, qflag,
                 sflag, vflag, wflag, xflag, nullflag;
extern int       binbehave;
extern const char *labelname;

extern int       first, matchall, patterns, tail, file_err;
extern char    **pattern;
extern fastgrep_t *fg_pattern;
extern regex_t  *r_pattern;

/* For -m max-count */
extern long long mcount, mlimit;

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

/* util.c */
int              procfile(char *fn);
int              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);
void            *grep_reallocarray(void *ptr, size_t nmemb, size_t size);
void             printline(str_t *line, int sep, regmatch_t *pmatch);
int              fastcomp(fastgrep_t *, const char *);
void             fgrepcomp(fastgrep_t *, const unsigned char *);

/* queue.c */
void             initqueue(void);
void             enqueue(str_t *x);
void             printqueue(void);
void             clearqueue(void);

/* mmfile.c */
typedef struct mmfile {
        int      fd;
        size_t   len;
        char    *base, *end, *ptr;
} mmf_t;

mmf_t           *mmopen(int fd, struct stat *sb);
void             mmclose(mmf_t *mmf);
char            *mmfgetln(mmf_t *mmf, size_t *l);

/* file.c */
struct file;
typedef struct file file_t;

file_t          *grep_fdopen(int fd);
file_t          *grep_open(char *path);
int              grep_bin_file(file_t *f);
char            *grep_fgetln(file_t *f, size_t *l);
void             grep_close(file_t *f);

/* binary.c */
int              bin_file(FILE * f);
int              gzbin_file(gzFile f);
int              mmbin_file(mmf_t *f);