/* idx.h
 *
 * simple index manager for UUPC news
 *
 * Author:  Kai Uwe Rommel <rommel@ars.muc.de>
 * Created: Sun Aug 15 1993
 */
 
/* $Id: idx.h 1.2 1994/03/20 23:37:12 rommel Exp $ */

/* $Log: idx.h $
 * Revision 1.2  1994/03/20  23:37:12  rommel
 * Correct 16/32 bit compiler differences
 *
 * Revision 1.1  1993/09/05  10:56:49  rommel
 * Initial revision
 * */

#ifndef _IDX_H
#define _IDX_H

#define IDX_MAGIC      4712

#define IDX_MAXKEY     80
#define IDX_MINITEM    10
#define IDX_MAXITEM    (IDX_MINITEM * 2)
#define IDX_MAXSTACK   20

typedef struct {
  char key[IDX_MAXKEY];
  long offset;
  short size;
  long child;
} ITEM;

typedef struct {
  short items;
  ITEM item[IDX_MAXITEM];
  long child_0;
} PAGE;

typedef struct {
  int magic;
  int file;
  long size;
  PAGE page;
  long page_number;
  int page_dirty;
  long page_stack[IDX_MAXSTACK];
  int page_stacksize;
} IDX;

extern IDX *idx_init(int file);
extern void idx_exit(IDX *idx);
extern int idx_addkey(IDX *idx, char *key, long offset, int size);
extern int idx_getkey(IDX *idx, char *key, long *offset, int *size);
extern int idx_delkey(IDX *idx, char *key, long *offset, int *size);

#endif /* _IDX_H */

/* end of idx.h */