Scippy

SCIP

Solving Constraint Integer Programs

Macros | Functions
nlhdlr_default.c File Reference
Implementation files (.c files) » SCIP Default Plugins » Default nonlinear handlers

Detailed Description

default nonlinear handler that calls expression handler methods

Author
Stefan Vigerske

Definition in file nlhdlr_default.c.

#include <string.h>
#include "scip/nlhdlr_default.h"
#include "scip/pub_nlhdlr.h"
#include "scip/cons_nonlinear.h"

Go to the source code of this file.

Macros

#define NLHDLR_NAME   "default"
 
#define NLHDLR_DESC   "default handler for expressions"
 
#define NLHDLR_DETECTPRIORITY   0
 
#define NLHDLR_ENFOPRIORITY   0
 
#define infty2infty(infty1, infty2, val)   ((val) >= (infty1) ? (infty2) : (val))
 
#define UNDERESTIMATEUSESACTIVITY   0x1u
 
#define OVERESTIMATEUSESACTIVITY   0x2u
 

Functions

static SCIP_RETCODE evalExprInAux (SCIP *scip, SCIP_EXPR *expr, SCIP_Real *val, SCIP_SOL *sol)
 
static SCIP_DECL_NLHDLRDETECT (nlhdlrDetectDefault)
 
static SCIP_DECL_NLHDLREVALAUX (nlhdlrEvalAuxDefault)
 
static SCIP_DECL_NLHDLRINITSEPA (nlhdlrInitSepaDefault)
 
static SCIP_DECL_NLHDLRESTIMATE (nlhdlrEstimateDefault)
 
static SCIP_DECL_NLHDLRSOLLINEARIZE (nlhdlrSollinearizeDefault)
 
static SCIP_DECL_NLHDLRINTEVAL (nlhdlrIntevalDefault)
 
static SCIP_DECL_NLHDLRREVERSEPROP (nlhdlrReversepropDefault)
 
static SCIP_DECL_NLHDLRCOPYHDLR (nlhdlrCopyhdlrDefault)
 
static SCIP_DECL_NLHDLRFREEEXPRDATA (nlhdlrFreeExprDataDefault)
 
SCIP_RETCODE SCIPincludeNlhdlrDefault (SCIP *scip)
 

Macro Definition Documentation

◆ NLHDLR_NAME

#define NLHDLR_NAME   "default"

Definition at line 38 of file nlhdlr_default.c.

◆ NLHDLR_DESC

#define NLHDLR_DESC   "default handler for expressions"

Definition at line 39 of file nlhdlr_default.c.

◆ NLHDLR_DETECTPRIORITY

#define NLHDLR_DETECTPRIORITY   0

Definition at line 40 of file nlhdlr_default.c.

◆ NLHDLR_ENFOPRIORITY

#define NLHDLR_ENFOPRIORITY   0

Definition at line 41 of file nlhdlr_default.c.

◆ infty2infty

#define infty2infty (   infty1,
  infty2,
  val 
)    ((val) >= (infty1) ? (infty2) : (val))

translate from one value of infinity to another

if val is ≥ infty1, then give infty2, else give val

Definition at line 47 of file nlhdlr_default.c.

◆ UNDERESTIMATEUSESACTIVITY

#define UNDERESTIMATEUSESACTIVITY   0x1u

whether underestimation uses activity

Definition at line 49 of file nlhdlr_default.c.

◆ OVERESTIMATEUSESACTIVITY

#define OVERESTIMATEUSESACTIVITY   0x2u

whether overestimation uses activity

Definition at line 50 of file nlhdlr_default.c.

Function Documentation

◆ evalExprInAux()

static SCIP_RETCODE evalExprInAux ( SCIP *  scip,
SCIP_EXPR *  expr,
SCIP_Real *  val,
SCIP_SOL *  sol 
)
static

evaluates an expression w.r.t. the values in the auxiliary variables

Parameters
scipSCIP data structure
exprexpression to be evaluated
valbuffer to store value of expression
solsolution to be evaluated

Definition at line 57 of file nlhdlr_default.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcallExprEval(), SCIPexprGetChildren(), SCIPexprGetNChildren(), SCIPfreeBufferArray, SCIPgetExprAuxVarNonlinear(), and SCIPgetSolVal().

Referenced by SCIP_DECL_NLHDLREVALAUX().

◆ SCIP_DECL_NLHDLRDETECT()

static SCIP_DECL_NLHDLRDETECT ( nlhdlrDetectDefault  )
static

check whether expression should be handled by the default nlhdlr

if no nlhdlr so far provides enforcement or boundtightening for expr, then the default nlhdlr takes over

Definition at line 99 of file nlhdlr_default.c.

References FALSE, NULL, OVERESTIMATEUSESACTIVITY, SCIP_Bool, SCIP_CALL, SCIP_EXPRCURV_CONCAVE, SCIP_EXPRCURV_CONVEX, SCIP_NLHDLR_METHOD_ACTIVITY, SCIP_NLHDLR_METHOD_SEPAABOVE, SCIP_NLHDLR_METHOD_SEPABELOW, SCIP_NLHDLR_METHOD_SEPABOTH, SCIP_OKAY, SCIPallocBufferArray, SCIPexprGetChildren(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprhdlrHasEstimate(), SCIPexprhdlrHasIntEval(), SCIPexprhdlrHasReverseProp(), SCIPfreeBufferArray, SCIPregisterExprUsageNonlinear(), and UNDERESTIMATEUSESACTIVITY.

◆ SCIP_DECL_NLHDLREVALAUX()

static SCIP_DECL_NLHDLREVALAUX ( nlhdlrEvalAuxDefault  )
static

evaluate expression w.r.t. values of auxiliary variables in children

Definition at line 198 of file nlhdlr_default.c.

References evalExprInAux(), NULL, SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_NLHDLRINITSEPA()

static SCIP_DECL_NLHDLRINITSEPA ( nlhdlrInitSepaDefault  )
static

initialize LP relaxation by initial estimators

Definition at line 210 of file nlhdlr_default.c.

References FALSE, infty2infty, NULL, OVERESTIMATEUSESACTIVITY, SCIP_Bool, SCIP_CALL, SCIP_EXPR_MAXINITESTIMATES, SCIP_INTERVAL_INFINITY, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPaddRow(), SCIPaddRowprepTerm(), SCIPallocBufferArray, SCIPchgRowLhs(), SCIPchgRowRhs(), SCIPcleanupRowprep2(), SCIPcreateRowprep(), SCIPdebug, SCIPdebugMsg, SCIPensureRowprepSize(), SCIPevalExprActivity(), SCIPexprGetActivity(), SCIPexprGetChildren(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprhdlrGetName(), SCIPexprhdlrHasInitEstimates(), SCIPfreeBufferArray, SCIPfreeRowprep(), SCIPgetDepth(), SCIPgetExprAuxVarNonlinear(), SCIPgetHugeValue(), SCIPgetRowprepRowCons(), SCIPinfinity(), SCIPinfoMessage(), SCIPintervalIntersect(), SCIPintervalIsEmpty(), SCIPintervalSetBounds(), SCIPisExprSum(), SCIPisInfinity(), SCIPprintExpr(), SCIPprintRow(), SCIPreleaseRow(), SCIProwGetLhs(), SCIProwGetRhs(), SCIProwprepAddConstant(), SCIProwprepGetName(), SCIProwprepGetNVars(), SCIProwprepGetSidetype(), SCIProwprepReset(), SCIProwprepSetSidetype(), SCIPscaleupRowprep(), SCIPsnprintf(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), TRUE, and UNDERESTIMATEUSESACTIVITY.

◆ SCIP_DECL_NLHDLRESTIMATE()

static SCIP_DECL_NLHDLRESTIMATE ( nlhdlrEstimateDefault  )
static

compute linear estimator

Definition at line 376 of file nlhdlr_default.c.

References FALSE, infty2infty, NULL, OVERESTIMATEUSESACTIVITY, SCIP_Bool, SCIP_CALL, SCIP_INTERVAL_INFINITY, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPaddExprsViolScoreNonlinear(), SCIPaddRowprepTerm(), SCIPallocBufferArray, SCIPcreateRowprep(), SCIPdebug, SCIPensureRowprepSize(), SCIPepsilon(), SCIPevalExprActivity(), SCIPexprGetActivity(), SCIPexprGetChildren(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprhdlrGetName(), SCIPexprhdlrIncrementNBranchings(), SCIPfreeBufferArray, SCIPfreeRowprep(), SCIPgetExprAbsAuxViolationNonlinear(), SCIPgetExprAuxVarNonlinear(), SCIPgetExprRelAuxViolationNonlinear(), SCIPgetNLPs(), SCIPgetSolVal(), SCIPinfinity(), SCIPinfoMessage(), SCIPintervalIntersectEps(), SCIPintervalIsEmpty(), SCIPintervalSetBounds(), SCIPprintExpr(), SCIPprintRowprepSol(), SCIProwprepAddConstant(), SCIProwprepGetCoefs(), SCIProwprepGetName(), SCIProwprepSetLocal(), SCIPsetPtrarrayVal(), SCIPsnprintf(), SCIPsolGetIndex(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), TRUE, and UNDERESTIMATEUSESACTIVITY.

◆ SCIP_DECL_NLHDLRSOLLINEARIZE()

static SCIP_DECL_NLHDLRSOLLINEARIZE ( nlhdlrSollinearizeDefault  )
static

solution linearization callback

Definition at line 539 of file nlhdlr_default.c.

References FALSE, infty2infty, NULL, OVERESTIMATEUSESACTIVITY, SCIP_Bool, SCIP_CALL, SCIP_INTERVAL_INFINITY, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPaddPoolCut(), SCIPaddRowprepTerm(), SCIPallocBufferArray, SCIPcleanupRowprep2(), SCIPcreateRowprep(), SCIPdebug, SCIPensureRowprepSize(), SCIPexprGetChildren(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprhdlrGetName(), SCIPfreeBufferArray, SCIPfreeRowprep(), SCIPgetExprAuxVarNonlinear(), SCIPgetHugeValue(), SCIPgetRowprepRowCons(), SCIPgetSolVal(), SCIPinfinity(), SCIPinfoMessage(), SCIPintervalSetBounds(), SCIPisExprSum(), SCIPprintExpr(), SCIPprintRowprepSol(), SCIPreleaseRow(), SCIProwprepAddConstant(), SCIProwprepGetCoefs(), SCIProwprepGetName(), SCIProwprepIsLocal(), SCIPsnprintf(), SCIPsolGetIndex(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), TRUE, and UNDERESTIMATEUSESACTIVITY.

◆ SCIP_DECL_NLHDLRINTEVAL()

static SCIP_DECL_NLHDLRINTEVAL ( nlhdlrIntevalDefault  )
static

interval-evaluate expression w.r.t. activity of children

Definition at line 660 of file nlhdlr_default.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_NLHDLRREVERSEPROP()

static SCIP_DECL_NLHDLRREVERSEPROP ( nlhdlrReversepropDefault  )
static

tighten bounds on children from bounds on expression and bounds on children

Definition at line 673 of file nlhdlr_default.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPexprGetChildren(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprhdlrIncrementNDomainReductions(), SCIPfreeBufferArray, SCIPgetExprBoundsNonlinear(), and SCIPtightenExprIntervalNonlinear().

◆ SCIP_DECL_NLHDLRCOPYHDLR()

static SCIP_DECL_NLHDLRCOPYHDLR ( nlhdlrCopyhdlrDefault  )
static

nonlinear handler copy callback

Definition at line 709 of file nlhdlr_default.c.

References NLHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPincludeNlhdlrDefault(), and SCIPnlhdlrGetName().

◆ SCIP_DECL_NLHDLRFREEEXPRDATA()

static SCIP_DECL_NLHDLRFREEEXPRDATA ( nlhdlrFreeExprDataDefault  )
static

callback to free expression specific data

Definition at line 722 of file nlhdlr_default.c.

References NULL, and SCIP_OKAY.