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#ifndef NVIM_UNDO_DEFS_H
#define NVIM_UNDO_DEFS_H
#include <time.h> // for time_t
#include "nvim/pos.h"
#include "nvim/mark_defs.h"
typedef struct u_header u_header_T;
/* Structure to store info about the Visual area. */
typedef struct {
pos_T vi_start; /* start pos of last VIsual */
pos_T vi_end; /* end position of last VIsual */
int vi_mode; /* VIsual_mode of last VIsual */
colnr_T vi_curswant; /* MAXCOL from w_curswant */
} visualinfo_T;
#include "nvim/buffer_defs.h"
typedef struct u_entry u_entry_T;
struct u_entry {
u_entry_T *ue_next; /* pointer to next entry in list */
linenr_T ue_top; /* number of line above undo block */
linenr_T ue_bot; /* number of line below undo block */
linenr_T ue_lcount; /* linecount when u_save called */
char_u **ue_array; /* array of lines in undo block */
long ue_size; /* number of lines in ue_array */
#ifdef U_DEBUG
int ue_magic; /* magic number to check allocation */
#endif
};
struct u_header {
/* The following have a pointer and a number. The number is used when
* reading the undo file in u_read_undo() */
union {
u_header_T *ptr; /* pointer to next undo header in list */
long seq;
} uh_next;
union {
u_header_T *ptr; /* pointer to previous header in list */
long seq;
} uh_prev;
union {
u_header_T *ptr; /* pointer to next header for alt. redo */
long seq;
} uh_alt_next;
union {
u_header_T *ptr; /* pointer to previous header for alt. redo */
long seq;
} uh_alt_prev;
long uh_seq; /* sequence number, higher == newer undo */
int uh_walk; /* used by undo_time() */
u_entry_T *uh_entry; /* pointer to first entry */
u_entry_T *uh_getbot_entry; /* pointer to where ue_bot must be set */
pos_T uh_cursor; /* cursor position before saving */
long uh_cursor_vcol;
int uh_flags; /* see below */
fmark_T uh_namedm[NMARKS]; /* marks before undo/after redo */
visualinfo_T uh_visual; /* Visual areas before undo/after redo */
time_t uh_time; /* timestamp when the change was made */
long uh_save_nr; /* set when the file was saved after the
changes in this block */
#ifdef U_DEBUG
int uh_magic; /* magic number to check allocation */
#endif
};
/* values for uh_flags */
#define UH_CHANGED 0x01 /* b_changed flag before undo/after redo */
#define UH_EMPTYBUF 0x02 /* buffer was empty */
/// Structure passed around between undofile functions.
typedef struct {
buf_T *bi_buf;
FILE *bi_fp;
} bufinfo_T;
#endif // NVIM_UNDO_DEFS_H
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