#ifndef _BUF_H
#define _BUF_H

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

#define	PATHSIZE 512
#define	MINIB_SIZE 100
#define	MAX_SAVED_MOTION 10

#define	TABSTOP 8

struct line {
        TAILQ_ENTRY(line) list;
	int len;
	char *line;
};

struct buf {
	TAILQ_HEAD(lines_head, line) lines;
	int num_lines;
	int dirty;
};

struct pos {
	int x;
	int y;
};

struct file {
	char path[PATHSIZE];
	char dir[PATHSIZE];
	mode_t mode;
};

struct cmd {
	char key;
	int count;
	int flags;
	struct pos new_pos;	/* Used for motion commands */
	struct pos mstart;	/* Start of the motion */
	struct pos mend;	/* End of the motion */
};

struct commands {
	int flags;
	int (*func)(struct cmd *cmd, struct buf *b);
};

#define	CMD_COUNT 0x1		/* Can take a count */
#define	CMD_ISMOTION 0x2	/* Can be used as a motion */
#define	CMD_MOTION 0x4		/* Takes a motion */
#define	CMD_MLINE 0x8		/* Operates on whole lines when motion */
#define	CMD_MODE 0x10		/* Changes mode and possibly curr_line XXX temp */
#define	CMD_COUNT0 0x20		/* Non-specified count has a special meaning */
#define	CMD_EFFECT 0x40		/* Modifies the buffer */

/* Used for struct cmd */
#define	CMD_DOT 0x00010000	/* This command was invoked from '.' */
#define	CMD_SUCCESS 0x00020000	/* Command succeeded */

#define	NUM_COMMANDS 512

#define	SHOWMATCH_MS 1000

typedef enum {
	UND_ADD,
	UND_MOD,
	UND_DEL
} undo_type_t;

extern struct commands cmds[NUM_COMMANDS];

#define	CTRL_G 7
#define	ESC 27
#define	BKSPC 127

struct line *line_next(struct line *l);
struct line *line_prev(struct line *l);
struct line *line_alloc(char *line, int len);
void line_add(struct buf *b, struct line *l, int pos);
void line_add_undo(struct buf *b, struct line *l, int y);
void line_add_partial(struct buf *b, struct line *l, int start, int end,
    int pos);
void line_remove(struct buf *b, struct line *l);
void line_remove_undo(struct buf *b, struct line *l, int y);
void line_replace(struct line *l, char *text, int len);
void line_replace_undo(struct line *l, char *text, int len, int y);
struct line *line_dup(struct line *l);
void line_free(struct line *l);
void buf_init(struct buf *b);
struct line *buf_get_line(struct buf *b, int num);
int buf_find_line(struct buf *b, struct line *line);
void buf_dump(struct buf *b);
void buf_clear(struct buf *b);
void buf_union(struct buf *b1, struct buf *b2, int pos);
int file_load(struct file *f, struct buf *b);
int file_store(struct file *f, struct buf *b);

#define printd(...) printy(maxy - 1, A_NORMAL, __VA_ARGS__)
#define printerr(...) printy(maxy - 1, A_REVERSE, __VA_ARGS__)
void printy(int y, int attr, const char *fmt, ...);
void clear_mini(void);
int draw_line(struct line *l, int y);
void place_cursor(struct line *l, int x, int y, int insert);
void place_char(struct line *l, int x, int y, int c);
void y_inc(struct pos *pos);
void y_dec(struct pos *pos);
void cur_fixup(void);

int nextchar(struct buf *b, struct pos *p);
int prevchar(struct buf *b, struct pos *p);
void skipblank(struct line *l, struct pos *p);
int findmatch(struct buf *b, char o, struct pos *p, int _depth);
int delete(struct buf *b, struct buf *yank, struct pos start, struct pos end,
    int del);

int cmd_insert(struct cmd *c, struct buf *b);
int cmd_replace(struct cmd *c, struct buf *b);
int cmd_change(struct cmd *c, struct buf *b);

void undo_init(void);
void undo_start(struct cmd *c);
void undo_finish(struct cmd *c);
void undo_add_line(struct line *l, int y, undo_type_t type);
int cmd_undo(struct cmd *c, struct buf *b);

int cmd_search(struct cmd *c, struct buf *b);
int cmd_search_next(struct cmd *c, struct buf *b);

int cmd_ex(struct cmd *c, struct buf *b);

/* Globals */
extern struct file file;
extern struct buf buf;
extern struct buf yank_buf;
extern struct line *curr_line;

extern int tmp_count;

extern char *minib;
extern int minipos;

extern struct pos cur;
extern int disp_y;
extern int maxx, maxy;
extern int cur_y;

extern int debug;

extern int opt_ai;
extern int opt_sm;

#endif