#ifndef ED_H
#define ED_H

#include "lpc_incl.h"

#include "regexp.h"

/* define this if you don't like the ending dollar signs in ed, in n-mode */
#undef NO_END_DOLLAR_SIGN
/*
 *      #defines for non-printing ASCII characters
 */
#define NUL     0x00            /* ^@ */
#define EOS     0x00            /* end of string */
#define SOH     0x01            /* ^A */
#define STX     0x02            /* ^B */
#define ETX     0x03            /* ^C */
#define EOT     0x04            /* ^D */
#define ENQ     0x05            /* ^E */
#define ACK     0x06            /* ^F */
#define BEL     0x07            /* ^G */
#define BS      0x08            /* ^H */
#define HT      0x09            /* ^I */
#define LF      0x0a            /* ^J */
#define NL      '\n'
#define VT      0x0b            /* ^K */
#define FF      0x0c            /* ^L */
#define CR      0x0d            /* ^M */
#define SO      0x0e            /* ^N */
#define SI      0x0f            /* ^O */
#define DLE     0x10            /* ^P */
#define DC1     0x11            /* ^Q */
#define DC2     0x12            /* ^R */
#define DC3     0x13            /* ^S */
#define DC4     0x14            /* ^T */
#define NAK     0x15            /* ^U */
#define SYN     0x16            /* ^V */
#define ETB     0x17            /* ^W */
#define CAN     0x18            /* ^X */
#define EM      0x19            /* ^Y */
#define SUB     0x1a            /* ^Z */
#define ESC     0x1b            /* ^[ */
#define FS      0x1c            /* ^\ */
#define GS      0x1d            /* ^] */
#define US      0x1f            /* ^_ */
#define SP      0x20            /* space */
#define DEL     0x7f            /* DEL */
#define ESCAPE  '\\'

#ifndef TRUE
#define TRUE    1
#endif
#ifndef FALSE
#define FALSE   0
#endif
#define EDERR             -2
#define FATAL           (EDERR-1)
#define CHANGED         (EDERR-2)
#define SET_FAIL        (EDERR-3)
#define SUB_FAIL        (EDERR-4)
#define MEM_FAIL        (EDERR-5)
#define UNRECOG_COMMAND (EDERR-6)

#define BAD_LINE_RANGE  (EDERR-7)
#define BAD_LINE_NUMBER (EDERR-8)
#define SYNTAX_ERROR    (EDERR-9)
#define RANGE_ILLEGAL   (EDERR-10)
#define IS_RESTRICTED   (EDERR-11)
#define LINE_OR_RANGE_ILL (EDERR-12)
#define FILE_NAME_ERROR (EDERR-13)
#define MARK_A_TO_Z     (EDERR-14)
#define SUB_BAD_PATTERN (EDERR-15)
#define SUB_BAD_REPLACEMENT (EDERR-16)
#define BAD_DESTINATION (EDERR-17)
#define END_OF_FILE     (EDERR-18)
#define SEARCH_FAILED   (EDERR-19)
#define NO_LINE_RANGE   (EDERR-20)

// This one hopefully holds a screen's data for the 'z' command.
// Even if bytes per line is actually 80, this is still 50-ish lines.
#define BUFFER_SIZE     4096    

#define LGLOB           2       /* line marked global */

#define ED_MAXLINE      2047    /* max number of chars per line */
#define MAXPAT          256     /* max number of chars per replacemnt pattern */
#define MAXFNAME        256     /* max file name size */

typedef struct ed_line_s {
    int l_stat;                 /* empty, mark */
    struct ed_line_s *l_prev;
    struct ed_line_s *l_next;
    char l_buff[1];
} ed_line_t;

struct strlst {
    char *screen;
    struct strlst *next;
};

typedef struct ed_buffer_s {
    int nonascii;               /* count of non-ascii chars read */
    int nullchar;               /* count of null chars read */
    int truncated;              /* count of lines truncated */
    char fname[MAXFNAME];
    int fchanged;               /* file-changed? flag */
    int nofname;
    int mark['z' - 'a' + 1];
    regexp *oldpat;

    ed_line_t Line0;
    int CurLn;
    ed_line_t *CurPtr;          /* CurLn and CurPtr must be kept in step */
    int LastLn;
    int Line1, Line2, nlines;
    int flags;
    int appending;
    int moring;                 /* used for the wait line of help */
    struct strlst *helpout;	/* help output linked list */
#ifdef OLD_ED
    char *exit_fn;              /* Function to be called when user exits */
    char *write_fn;             /* Function to be called when user writes */
    object_t *exit_ob;  /* in this object */
#else
    object_t *owner;
    struct ed_buffer_s *next_ed_buf;
#endif
    int shiftwidth;
    int leading_blanks;
    int cur_autoindent;
    int scroll_lines;
    int restricted;             /* restricted access ed */
} ed_buffer_t;

/*
 * ed.c
 */
void ed_start (const char *, const char *, const char *, int, object_t *, int);
void ed_cmd (char *);
void save_ed_buffer (object_t *);

#ifdef OLD_ED
#define ED_OUTPUT(x, y) add_message(x, y, strlen(y))
#define ED_OUTPUTV      add_vmessage
#define ED_DEST         command_giver
#else
#define ED_OUTPUT       outbuf_add
#define ED_OUTPUTV      outbuf_addv
#define ED_DEST         &current_ed_results
#endif

#ifndef OLD_ED
char *object_ed_cmd (object_t *, const char *);
char *object_ed_start (object_t *, const char *, int, int);
int object_ed_mode (object_t *);
void object_save_ed_buffer (object_t *);
ed_buffer_t *find_ed_buffer (object_t *);
void object_ed_output (char *);
void object_ed_outputv(char *, ...);

extern outbuffer_t current_ed_results;
#endif

#endif