expr_log.h

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/**@file   expr_log.h
 * @ingroup EXPRHDLRS
 * @brief  logarithm expression handler
 * @author Stefan Vigerske
 * @author Benjamin Mueller
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_EXPR_LOG_H__
#define __SCIP_EXPR_LOG_H__
 
 
#include "scip/scip.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/**@addtogroup EXPRHDLRS
 *
 * @{
 *
 * @name Logarithm expression
 *
 * This expression handler provides the natural logarithm function, that is,
 * \f[
 *   x \mapsto \ln(x).
 * \f]
 *
 * @{
 */
 
/** creates a logarithmic expression */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateExprLog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_EXPR**           expr,               /**< pointer where to store expression */
   SCIP_EXPR*            child,              /**< single child */
   SCIP_DECL_EXPR_OWNERCREATE((*ownercreate)), /**< function to call to create ownerdata */
   void*                 ownercreatedata     /**< data to pass to ownercreate */
   );
 
/** indicates whether expression is of log-type */
SCIP_EXPORT
SCIP_Bool SCIPisExprLog(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_EXPR*            expr                /**< expression */
   );
 
/** @}
  * @}
  */
 
/** creates the handler for logarithmic expression and includes it into SCIP
 *
 * @ingroup ExprhdlrIncludes
 */
SCIP_EXPORT
SCIP_RETCODE SCIPincludeExprhdlrLog(
   SCIP*                 scip                /**< SCIP data structure */
   );
 
#ifdef __cplusplus
}
#endif
 
#endif /* __SCIP_EXPR_LOG_H__ */