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#ifndef _Iundo
#define _Iundo 1
#include "config.h"
#include "queue.h"
#include "b.h"
#define UNDOKEEP 100
typedef struct undo UNDO;
typedef struct undorec UNDOREC;
struct undorec
{
LINK(UNDOREC) link;
UNDOREC *unit;
int min;
int changed; /* Status of modified flag before this record */
long where; /* Buffer address of this record */
long len; /* Length of insert or delete */
int del; /* Set if this is a delete */
B *big; /* Set to buffer containing a large amount of deleted data */
char *small; /* Set to malloc block containg a small amount of deleted data */
};
struct undo
{
LINK(UNDO) link;
B *b;
int nrecs;
UNDOREC recs;
UNDOREC *ptr;
UNDOREC *first;
UNDOREC *last;
};
extern int inundo;
extern int justkilled;
UNDO *undomk();
void undorm();
int uundo();
int uredo();
void umclear();
void undomark();
void undoins();
void undodel();
int uyank();
int uyankpop();
int uyapp();
int unotmod();
int ucopy();
#endif
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