/*
 * Copyright (C) 1984-2012  Mark Nudelman
 * Modified for use with illumos by Garrett D'Amore.
 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
 *
 * You may distribute under the terms of either the GNU General Public
 * License or the Less License, as specified in the README file.
 *
 * For more information, see the README file.
 */

/*
 * Standard include file for "less".
 */

#include "defines.h"

#include <sys/types.h>

#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wctype.h>

/*
 * Simple lowercase test which can be used during option processing
 * (before options are parsed which might tell us what charset to use).
 */

#undef IS_SPACE
#undef IS_DIGIT

#define IS_SPACE(c)     isspace((unsigned char)(c))
#define IS_DIGIT(c)     isdigit((unsigned char)(c))

#ifndef TRUE
#define TRUE            1
#endif
#ifndef FALSE
#define FALSE           0
#endif

#define OPT_OFF         0
#define OPT_ON          1
#define OPT_ONPLUS      2

/*
 * Special types and constants.
 */
typedef unsigned long LWCHAR;
#define MIN_LINENUM_WIDTH  7    /* Min printing width of a line number */
#define MAX_UTF_CHAR_LEN   6    /* Max bytes in one UTF-8 char */

#define SHELL_META_QUEST 1

/*
 * An IFILE represents an input file.
 */
#define IFILE           void *

/*
 * The structure used to represent a "screen position".
 * This consists of a file position, and a screen line number.
 * The meaning is that the line starting at the given file
 * position is displayed on the ln-th line of the screen.
 * (Screen lines before ln are empty.)
 */
struct scrpos {
        off_t pos;
        int ln;
};

typedef union parg {
        char *p_string;
        int p_int;
        off_t p_linenum;
} PARG;

struct textlist {
        char *string;
        char *endstring;
};

#define EOI             (-1)

#define READ_INTR       (-2)

/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
#define NUM_FRAC_DENOM                  1000000
#define NUM_LOG_FRAC_DENOM              6

/* How quiet should we be? */
#define NOT_QUIET       0       /* Ring bell at eof and for errors */
#define LITTLE_QUIET    1       /* Ring bell only for errors */
#define VERY_QUIET      2       /* Never ring bell */

/* How should we prompt? */
#define PR_SHORT        0       /* Prompt with colon */
#define PR_MEDIUM       1       /* Prompt with message */
#define PR_LONG         2       /* Prompt with longer message */

/* How should we handle backspaces? */
#define BS_SPECIAL      0       /* Do special things for underlining and bold */
#define BS_NORMAL       1       /* \b treated as normal char; actually output */
#define BS_CONTROL      2       /* \b treated as control char; prints as ^H */

/* How should we search? */
#define SRCH_FORW       (1 << 0)  /* Search forward from current position */
#define SRCH_BACK       (1 << 1)  /* Search backward from current position */
#define SRCH_NO_MOVE    (1 << 2)  /* Highlight, but don't move */
#define SRCH_FIND_ALL   (1 << 4)  /* Find and highlight all matches */
#define SRCH_NO_MATCH   (1 << 8)  /* Search for non-matching lines */
#define SRCH_PAST_EOF   (1 << 9)  /* Search past end-of-file, into next file */
#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
#define SRCH_NO_REGEX   (1 << 12) /* Don't use regular expressions */
#define SRCH_FILTER     (1 << 13) /* Search is for '&' (filter) command */
#define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */

#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
                                (((t) & ~SRCH_FORW) | SRCH_BACK) : \
                                (((t) & ~SRCH_BACK) | SRCH_FORW))

/* */
#define NO_MCA          0
#define MCA_DONE        1
#define MCA_MORE        2

#define CC_OK           0       /* Char was accepted & processed */
#define CC_QUIT         1       /* Char was a request to abort current cmd */
#define CC_ERROR        2       /* Char could not be accepted due to error */
#define CC_PASS         3       /* Char was rejected (internal) */

#define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */

/* Special char bit-flags used to tell put_line() to do something special */
#define AT_NORMAL       (0)
#define AT_UNDERLINE    (1 << 0)
#define AT_BOLD         (1 << 1)
#define AT_BLINK        (1 << 2)
#define AT_STANDOUT     (1 << 3)
#define AT_ANSI         (1 << 4)  /* Content-supplied "ANSI" escape sequence */
#define AT_BINARY       (1 << 5)  /* LESS*BINFMT representation */
#define AT_HILITE       (1 << 6)  /* Internal highlights (e.g., for search) */
#define AT_INDET        (1 << 7)  /* Indeterminate: either bold or underline */

#define CONTROL(c)      ((c)&037)
#define ESC             CONTROL('[')

extern int any_sigs(void);
extern int abort_sigs(void);

#define QUIT_OK         0
#define QUIT_ERROR      1
#define QUIT_INTERRUPT  2
#define QUIT_SAVED_STATUS (-1)

#define FOLLOW_DESC     0
#define FOLLOW_NAME     1

/* filestate flags */
#define CH_CANSEEK      001
#define CH_KEEPOPEN     002
#define CH_HELPFILE     010
#define CH_NODATA       020     /* Special case for zero length files */


#define ch_zero()       (0)

#define FAKE_EMPTYFILE  "@/\\less/\\empty/\\file/\\@"

/* Flags for cvt_text */
#define CVT_TO_LC       01      /* Convert upper-case to lower-case */
#define CVT_BS          02      /* Do backspace processing */
#define CVT_CRLF        04      /* Remove CR after LF */
#define CVT_ANSI        010     /* Remove ANSI escape sequences */

#include "funcs.h"

/* Functions not included in funcs.h */
void postoa(off_t, char *, size_t);
void inttoa(int, char *, size_t);