type_rational.h

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/*         SCIP --- Solving Constraint Integer Programs                      */
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/**@file   type_rational.h
 * @brief  type definitions for rational numbers
 * @author Leon Eifler
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_TYPE_RATIONAL_H__
#define __SCIP_TYPE_RATIONAL_H__
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** type used for rational numbers */
typedef struct SCIP_Rational SCIP_RATIONAL;
 
/** dynamic array for storing SCIP_Real values */
typedef struct SCIP_RationalArray SCIP_RATIONALARRAY;
 
/** information if a rational is exactly representable as a floating point number */
enum SCIP_IsFpRepresentable
{
   SCIP_ISFPREPRESENTABLE_UNKNOWN = 0,       /**< representability is unknown */
   SCIP_ISFPREPRESENTABLE_TRUE    = 1,       /**< is representable */
   SCIP_ISFPREPRESENTABLE_FALSE   = 2        /**< is not representable */
};
typedef enum SCIP_IsFpRepresentable SCIP_ISFPREPRESENTABLE;
 
/** defines the possible rounding direction for a rational number, when converting to a double */
enum SCIP_RoundModeRational
{
   SCIP_R_ROUND_DOWNWARDS = 0,               /**< always round to nearest smaller double */
   SCIP_R_ROUND_UPWARDS   = 1,               /**< always round to nearest larger double */
   SCIP_R_ROUND_NEAREST   = 2                /**< always round to nearest double */
};
typedef enum SCIP_RoundModeRational SCIP_ROUNDMODE_RAT;
 
#ifdef __cplusplus
}
#endif
 
#endif