text: #ifndef __TXTIDX_STAT_H__
  #define __TXTIDX_STAT_H__
  
  #include "postgres.h"
  
  #include "access/gist.h"
  #include "access/itup.h"
  #include "utils/builtins.h"
  #include "storage/bufpage.h"
  #include "tsvector.h"
  
  typedef struct
  {
  	uint32		len;
  	uint32		pos;
  	uint32		ndoc;
  	uint32		nentry;
  }	StatEntry;
  
  typedef struct
  {
  	int4		len;
  	int4		size;
  	int4		weight;
  	char		data[1];
  }	tsstat;
  
  #define STATHDRSIZE (sizeof(int4) * 4)
  #define CALCSTATSIZE(x, lenstr) ( (x) * sizeof(StatEntry) + STATHDRSIZE + (lenstr) )
  #define STATPTR(x)	( (StatEntry*) ( (char*)(x) + STATHDRSIZE ) )
  #define STATSTRPTR(x)	( (char*)(x) + STATHDRSIZE + ( sizeof(StatEntry) * ((tsvector*)(x))->size ) )
  #define STATSTRSIZE(x)	( ((tsvector*)(x))->len - STATHDRSIZE - ( sizeof(StatEntry) * ((tsvector*)(x))->size ) )
  
  #endif
  