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/*
libundo, an easy to use undo/redo management library
Copyright 1999 Matt Kimball
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __libundo_h
#define __libundo_h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h> /* For size_t */
typedef struct _UNDO UNDO;
/* Undo session management */
int undo_new(char *session_name);
int undo_destroy(void);
UNDO *undo_get_session(void);
int undo_set_session(UNDO *undo);
/* Undo limits */
int undo_set_memory_limit(size_t max_memory);
/* Memory management for undo-watched memory */
void *undo_malloc(size_t size);
void *undo_realloc(void *mem, size_t size);
void undo_free(void *mem);
/* Recording functions */
int undo_snapshot(void);
/* Undo and redo */
int undo_undo(void);
int undo_redo(void);
unsigned undo_get_undo_count(void);
unsigned undo_get_redo_count(void);
/* Error codes */
#define UNDO_NOERROR 0 /* No error */
#define UNDO_BADPARAM 1 /* Bad parameter passed to function */
#define UNDO_NOMEM 2 /* Not enough memory */
#define UNDO_NOSESSION 3 /* No undo session */
#define UNDO_NODO 4 /* Nothing to undo/redo */
#define UNDO_NOLIMIT 5 /* No memory limit specified */
/* Error recovery */
int undo_get_errcode(void);
char *undo_strerror(int errcode);
#endif
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