mcoquad.h

extremeDB s sample code,useful for you

/*******************************************************************
 *                                                                 *
 *  mcoquad.h                                                      *
 *                                                                 *
 *  This file is a part of the eXtremeDB source code               *
 *  Copyright (c) 2001-2006 McObject LLC                           * 
 *  All Rights Reserved                                            *
 *                                                                 *
 *  eXtremeDB runtime 64 bit integers definitions                  *
 *                                                                 *
 ***************************************************************** */

#ifndef MCO_QUAD_H__
#define MCO_QUAD_H__


#ifdef __cplusplus
extern "C" { 
#endif

/* 64 bit integer arithmetic emulated 
  - replace by native where it is possible.
  Here defined only those methods that are used by DB runtime 
*/

#ifdef	MCO_CFG_QUAD_STRUCT

typedef struct mco_uquad_t { unsigned int lo; unsigned int hi; } mco_uquad;

typedef struct  mco_iquad_t { unsigned int lo; int hi; } mco_iquad;

void      mco_uquad_increment( mco_uquad * u8 );     /* (*u8) ++ */
short     mco_uquad_compare( const mco_uquad * a, const mco_uquad * b );  /* a<b ? -1 : (a>b ? 1 : 0) */
short     mco_iquad_compare( const mco_iquad * a, const mco_iquad * b );  /* a<b ? -1 : (a>b ? 1 : 0) */

#define   mco_quad_eq(a,b) (((a).lo==(b).lo) && ((a).hi==(b).hi))

#else  /* MCO_CFG_QUAD_STRUCT */

#if defined _MSC_VER
typedef          __int64 mco_iquad;
typedef unsigned __int64 mco_uquad;
#else
typedef          long long mco_iquad;
typedef unsigned long long mco_uquad;
#endif

#define mco_uquad_increment(u8) {(*u8)++;}

#define mco_uquad_compare(a,b) ((*a)<(*b)?-1:((*a)>(*b)?1:0))
#define mco_iquad_compare(a,b) ((*a)<(*b)?-1:((*a)>(*b)?1:0))

#define mco_quad_eq(a,b) (a==b)

#endif /* MCO_CFG_QUAD_STRUCT */

#ifdef __cplusplus
  }
#endif

#endif