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/*----------------------------------------------------------------------
  文件    : fptree.h
  内容: fptree头文件 
  作者  : 杨明智，黄昊          
----------------------------------------------------------------------*/
#ifndef __FPTREE__
#define __FPTREE__
#include "memsys.h"
#include "tract.h"

/*----------------------------------------------------------------------
  预定义
----------------------------------------------------------------------*/
#define FPT_ALTPROJ   0x01   
#define FPT_BONSAI    0x02   
/*----------------------------------------------------------------------
  类型定义
----------------------------------------------------------------------*/
/* FP树结点定义 */
typedef struct _fptnode {       
  struct _fptnode *succ;        /* 指向下一结点的指针 */
  struct _fptnode *parent;      /* 指向父结点的指针 */
  struct _fptnode *copy;        /* 辅助复制指针 */
  int             item;         /* 相应的 item */
  int             cnt;          /* transactions 数目 */
} FPTNODE;   

typedef struct {                /* FP树结点列表*/
  int     cnt;                  /* transactions数目 */
  FPTNODE *node;                /* 指向表中第一个结点的指针 */
} FPTLIST;   

typedef struct {                /* FP树定义*/
  ITEMSET *itemset;             
  int     cnt;                  
  int     tra;                  /* transactions 数目*/
  MEMSYS  *mem;             
  FPTLIST lists[1];       
} FPTREE;    

/*输出函数定义*/
typedef int FPTREPFN (int *ids, int cnt, int supp, void *data);


/*----------------------------------------------------------------------
  主函数定义 
----------------------------------------------------------------------*/
extern FPTREE* fpt_create  (TASET *taset);
extern void    fpt_delete  (FPTREE *fpt);
extern void    fpt_itemset (FPTREE *fpt);

extern int     fpt_search  (FPTREE *fpt, int supp, int min, int max,
                            int mode, FPTREPFN report, void *data);
#ifndef NDEBUG
extern void    fpt_show    (FPTREE *fpt, const char *title);
#endif

#define fpt_itemset(t)     ((t)->itemset)

#endif