Detailed Description

graph structure with common algorithms for directed and undirected graphs

Functions
SCIP_EXPORT SCIP_RETCODE	SCIPdigraphResize (SCIP_DIGRAPH *digraph, int nnodes)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphSetSizes (SCIP_DIGRAPH digraph, int sizes)

SCIP_EXPORT void	SCIPdigraphFree (SCIP_DIGRAPH **digraph)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphAddArc (SCIP_DIGRAPH digraph, int startnode, int endnode, void data)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphAddArcSafe (SCIP_DIGRAPH digraph, int startnode, int endnode, void data)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphSetNSuccessors (SCIP_DIGRAPH *digraph, int node, int nsuccessors)

SCIP_EXPORT int	SCIPdigraphGetNNodes (SCIP_DIGRAPH *digraph)

SCIP_EXPORT void *	SCIPdigraphGetNodeData (SCIP_DIGRAPH *digraph, int node)

SCIP_EXPORT void	SCIPdigraphSetNodeData (SCIP_DIGRAPH digraph, void dataptr, int node)

SCIP_EXPORT int	SCIPdigraphGetNArcs (SCIP_DIGRAPH *digraph)

SCIP_EXPORT int	SCIPdigraphGetNSuccessors (SCIP_DIGRAPH *digraph, int node)

SCIP_EXPORT int *	SCIPdigraphGetSuccessors (SCIP_DIGRAPH *digraph, int node)

SCIP_EXPORT void **	SCIPdigraphGetSuccessorsData (SCIP_DIGRAPH *digraph, int node)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphGetArticulationPoints (SCIP_DIGRAPH digraph, int articulations, int narticulations)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphComputeUndirectedComponents (SCIP_DIGRAPH digraph, int minsize, int components, int *ncomponents)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphComputeDirectedComponents (SCIP_DIGRAPH digraph, int compidx, int strongcomponents, int strongcompstartidx, int nstrongcomponents)

SCIP_EXPORT SCIP_RETCODE	SCIPdigraphTopoSortComponents (SCIP_DIGRAPH *digraph)

SCIP_EXPORT int	SCIPdigraphGetNComponents (SCIP_DIGRAPH *digraph)

SCIP_EXPORT void	SCIPdigraphGetComponent (SCIP_DIGRAPH digraph, int compidx, int nodes, int nnodes)

SCIP_EXPORT void	SCIPdigraphFreeComponents (SCIP_DIGRAPH *digraph)

SCIP_EXPORT void	SCIPdigraphPrint (SCIP_DIGRAPH digraph, SCIP_MESSAGEHDLR messagehdlr, FILE *file)

SCIP_EXPORT void	SCIPdigraphPrintGml (SCIP_DIGRAPH digraph, FILE file)

SCIP_EXPORT void	SCIPdigraphPrintComponents (SCIP_DIGRAPH digraph, SCIP_MESSAGEHDLR messagehdlr, FILE *file)

SCIP_EXPORT SCIP_RETCODE	SCIPcreateDigraph (SCIP scip, SCIP_DIGRAPH *digraph, int nnodes)

SCIP_EXPORT SCIP_RETCODE	SCIPcopyDigraph (SCIP scip, SCIP_DIGRAPH targetdigraph, SCIP_DIGRAPH sourcedigraph)

Function Documentation

◆ SCIPdigraphResize()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphResize	(	SCIP_DIGRAPH *	digraph,
		int	nnodes
	)

resize directed graph structure

Parameters

digraph	directed graph
nnodes	new number of nodes

Definition at line 7305 of file misc.c.

References SCIP_Digraph::arcdata, SCIP_Digraph::blkmem, BMSreallocBlockMemoryArray, nnodes, SCIP_Digraph::nnodes, SCIP_Digraph::nodedata, SCIP_Digraph::nsuccessors, NULL, SCIP_ALLOC, SCIP_OKAY, SCIP_Digraph::successors, and SCIP_Digraph::successorssize.

Referenced by SCIPrealHashCode().

◆ SCIPdigraphSetSizes()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphSetSizes	(	SCIP_DIGRAPH *	digraph,
		int *	sizes
	)

sets the sizes of the successor lists for the nodes in a directed graph and allocates memory for the lists

Parameters

digraph	directed graph
sizes	sizes of the successor lists

Definition at line 7435 of file misc.c.

References SCIP_Digraph::arcdata, SCIP_Digraph::blkmem, BMSallocBlockMemoryArray, SCIP_Digraph::nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_ALLOC, SCIP_OKAY, SCIP_Digraph::successors, and SCIP_Digraph::successorssize.

Referenced by findComponents(), and SCIPrealHashCode().

◆ SCIPdigraphFree()

SCIP_EXPORT void SCIPdigraphFree ( SCIP_DIGRAPH ** digraph )

frees given directed graph structure

Parameters

digraph pointer to the directed graph

Definition at line 7459 of file misc.c.

References SCIP_Digraph::arcdata, SCIP_Digraph::articulations, SCIP_Digraph::articulationscheck, BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeBlockMemoryArrayNull, SCIP_Digraph::components, SCIP_Digraph::componentstarts, SCIP_Digraph::componentstartsize, SCIP_Digraph::narticulations, SCIP_Digraph::ncomponents, SCIP_Digraph::nnodes, SCIP_Digraph::nodedata, SCIP_Digraph::nsuccessors, NULL, SCIPdigraphFreeComponents(), SCIP_Digraph::successors, and SCIP_Digraph::successorssize.

Referenced by buildBlockGraph(), findComponents(), freeConflictgraph(), heurdataFree(), presolRoundConssSOS1(), presolRoundVarsSOS1(), readFile(), SCIP_DECL_PROBDELORIG(), SCIP_DECL_PROBDELTRANS(), SCIP_DECL_READERREAD(), SCIP_DECL_SEPAEXECLP(), SCIPrealHashCode(), sortGenVBounds(), and tightenVarsBoundsSOS1().

◆ SCIPdigraphAddArc()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphAddArc	(	SCIP_DIGRAPH *	digraph,
		int	startnode,
		int	endnode,
		void *	data
	)

add (directed) arc and a related data to the directed graph structure

Note: if the arc is already contained, it is added a second time

Parameters

digraph	directed graph
startnode	start node of the arc
endnode	start node of the arc
data	data that should be stored for the arc; or NULL

Definition at line 7553 of file misc.c.

References SCIP_Digraph::arcdata, SCIP_Digraph::articulationscheck, ensureSuccessorsSize(), FALSE, nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_CALL, SCIP_OKAY, and SCIP_Digraph::successors.

Referenced by addBranchingComplementaritiesSOS1(), buildBlockGraph(), createVariables(), fillDigraph(), getPrecedence(), parseDetails(), SCIP_DECL_SEPAEXECLP(), SCIPdigraphComputeUndirectedComponents(), SCIPrealHashCode(), sortGenVBounds(), and updateArcData().

◆ SCIPdigraphAddArcSafe()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphAddArcSafe	(	SCIP_DIGRAPH *	digraph,
		int	startnode,
		int	endnode,
		void *	data
	)

add (directed) arc to the directed graph structure, if it is not contained, yet

Note: if there already exists an arc from startnode to endnode, the new arc is not added, even if its data is different

Parameters

digraph	directed graph
startnode	start node of the arc
endnode	start node of the arc
data	data that should be stored for the arc; or NULL

Definition at line 7584 of file misc.c.

References SCIP_Digraph::arcdata, SCIP_Digraph::articulationscheck, ensureSuccessorsSize(), FALSE, nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_CALL, SCIP_OKAY, and SCIP_Digraph::successors.

Referenced by enforceConflictgraph(), extensionOperatorSOS1(), genConflictgraphLinearCons(), handleNewVariableSOS1(), initConflictgraph(), performImplicationGraphAnalysis(), presolRoundConssSOS1(), and SCIPrealHashCode().

◆ SCIPdigraphSetNSuccessors()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphSetNSuccessors	(	SCIP_DIGRAPH *	digraph,
		int	node,
		int	nsuccessors
	)

sets the number of successors to a given value

Parameters

digraph	directed graph
node	node for which the number of successors has to be changed
nsuccessors	new number of successors

Definition at line 7621 of file misc.c.

References nnodes, SCIP_Digraph::nsuccessors, NULL, and SCIP_OKAY.

Referenced by resetConflictgraphSOS1(), and SCIPrealHashCode().

◆ SCIPdigraphGetNNodes()

SCIP_EXPORT int SCIPdigraphGetNNodes ( SCIP_DIGRAPH * digraph )

returns the number of nodes of the given digraph

Parameters

digraph directed graph

Definition at line 7637 of file misc.c.

References SCIP_Digraph::nnodes, and NULL.

Referenced by addPathCuts(), addSubtourCuts(), addTourCuts(), buildBlockGraph(), cliqueGetCommonSuccessorsSOS1(), computeNextAdjacency(), nodeGetSolvalBinaryBigMSOS1(), nodeGetSolvalVarboundLbSOS1(), nodeGetSolvalVarboundUbSOS1(), performImplicationGraphAnalysis(), SCIPrealHashCode(), and sortGenVBounds().

◆ SCIPdigraphGetNodeData()

SCIP_EXPORT void* SCIPdigraphGetNodeData	(	SCIP_DIGRAPH *	digraph,
		int	node
	)

returns the node data, or NULL if no data exist

Parameters

digraph	directed graph
node	node for which the node data is returned

Definition at line 7647 of file misc.c.

References nnodes, SCIP_Digraph::nodedata, and NULL.

Referenced by addBranchingComplementaritiesSOS1(), checkConComponentsVarbound(), detectVarboundSOS1(), freeConflictgraph(), generateBoundInequalityFromSOS1Nodes(), getBoundConsFromVertices(), nodeGetSolvalVarboundLbSOS1(), nodeGetSolvalVarboundUbSOS1(), passConComponentVarbound(), propVariableNonzero(), SCIPrealHashCode(), and sepaImplBoundCutsSOS1().

◆ SCIPdigraphSetNodeData()

SCIP_EXPORT void SCIPdigraphSetNodeData	(	SCIP_DIGRAPH *	digraph,
		void *	dataptr,
		int	node
	)

sets the node data

Note: The old user pointer is not freed. This has to be done by the user

Parameters

digraph	directed graph
dataptr	user node data pointer, or NULL
node	node for which the node data is returned

Definition at line 7663 of file misc.c.

References nnodes, SCIP_Digraph::nodedata, and NULL.

Referenced by freeConflictgraph(), initConflictgraph(), initImplGraphSOS1(), and SCIPrealHashCode().

◆ SCIPdigraphGetNArcs()

SCIP_EXPORT int SCIPdigraphGetNArcs ( SCIP_DIGRAPH * digraph )

returns the total number of arcs in the given digraph

Parameters

digraph directed graph

Definition at line 7677 of file misc.c.

References narcs, SCIP_Digraph::nnodes, SCIP_Digraph::nsuccessors, and NULL.

Referenced by SCIP_DECL_SEPAEXECLP(), SCIPrealHashCode(), and sepaImplBoundCutsSOS1().

◆ SCIPdigraphGetNSuccessors()

SCIP_EXPORT int SCIPdigraphGetNSuccessors	(	SCIP_DIGRAPH *	digraph,
		int	node
	)

returns the number of successor nodes of the given node

Parameters

digraph	directed graph
node	node for which the number of outgoing arcs is returned

Definition at line 7695 of file misc.c.

References nnodes, SCIP_Digraph::nsuccessors, NULL, and SCIP_Digraph::successorssize.

Referenced by addBranchingComplementaritiesSOS1(), addPathCuts(), addSubtourCuts(), addTourCuts(), buildBlockGraph(), checkConComponentsVarbound(), checkSwitchNonoverlappingSOS1Methods(), cliqueGetCommonSuccessorsSOS1(), computeNextAdjacency(), computeUbmakespan(), computeVarsCoverSOS1(), enforceConflictgraph(), findArticulationPointsUtil(), genConflictgraphLinearCons(), getBoundConsFromVertices(), getBranchingPrioritiesSOS1(), getBranchingVerticesSOS1(), getCoverVertices(), getDiveBdChgsSOS1conflictgraph(), getSOS1Implications(), getVectorOfWeights(), handleNewVariableSOS1(), initConflictgraph(), initImplGraphSOS1(), initTCliquegraph(), isConnectedSOS1(), isViolatedSOS1(), markNeighborsMWISHeuristic(), maxWeightIndSetHeuristic(), passConComponentVarbound(), performImplicationGraphAnalysis(), presolRoundConssSOS1(), presolRoundVarsSOS1(), propagateEst(), propagateLst(), propVariableNonzero(), resetConflictgraphSOS1(), SCIP_DECL_SEPAEXECLP(), SCIPcreateSchedulingProblem(), SCIPrealHashCode(), sepaImplBoundCutsSOS1(), tightenVarsBoundsSOS1(), and updateArcData().

◆ SCIPdigraphGetSuccessors()

SCIP_EXPORT int* SCIPdigraphGetSuccessors	(	SCIP_DIGRAPH *	digraph,
		int	node
	)

returns the array of indices of the successor nodes; this array must not be changed from outside

Parameters

digraph	directed graph
node	node for which the array of outgoing arcs is returned

Definition at line 7710 of file misc.c.

References nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_Digraph::successors, and SCIP_Digraph::successorssize.

Referenced by addBranchingComplementaritiesSOS1(), addPathCuts(), addSubtourCuts(), addTourCuts(), buildBlockGraph(), checkConComponentsVarbound(), cliqueGetCommonSuccessorsSOS1(), computeNextAdjacency(), computeVarsCoverSOS1(), enforceConflictgraph(), findArticulationPointsUtil(), genConflictgraphLinearCons(), getBoundConsFromVertices(), getBranchingVerticesSOS1(), getCoverVertices(), getDiveBdChgsSOS1conflictgraph(), getSOS1Implications(), getVectorOfWeights(), handleNewVariableSOS1(), initConflictgraph(), initImplGraphSOS1(), initTCliquegraph(), isConnectedSOS1(), isViolatedSOS1(), markNeighborsMWISHeuristic(), passConComponentVarbound(), performImplicationGraphAnalysis(), presolRoundConssSOS1(), propagateEst(), propagateLst(), propVariableNonzero(), resetConflictgraphSOS1(), SCIP_DECL_SEPAEXECLP(), SCIPcreateSchedulingProblem(), SCIPrealHashCode(), sepaImplBoundCutsSOS1(), tightenVarsBoundsSOS1(), and updateArcData().

◆ SCIPdigraphGetSuccessorsData()

SCIP_EXPORT void** SCIPdigraphGetSuccessorsData	(	SCIP_DIGRAPH *	digraph,
		int	node
	)

returns the array of data corresponding to the arcs originating at the given node, or NULL if no data exist; this array must not be changed from outside

Parameters

digraph	directed graph
node	node for which the data corresponding to the outgoing arcs is returned

Definition at line 7728 of file misc.c.

References SCIP_Digraph::arcdata, nnodes, SCIP_Digraph::nsuccessors, NULL, and SCIP_Digraph::successorssize.

Referenced by computeUbmakespan(), getSOS1Implications(), performImplicationGraphAnalysis(), presolRoundVarsSOS1(), propVariableNonzero(), SCIPcreateSchedulingProblem(), SCIPrealHashCode(), sepaImplBoundCutsSOS1(), and updateArcData().

◆ SCIPdigraphGetArticulationPoints()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphGetArticulationPoints	(	SCIP_DIGRAPH *	digraph,
		int **	articulations,
		int *	narticulations
	)

identifies the articulation points in a given directed graph uses the helper recursive function findArticulationPointsUtil

Parameters

digraph	directed graph
articulations	array to store the sorted node indices of the computed articulation points, or NULL
narticulations	number of the computed articulation points, or NULL

Definition at line 7891 of file misc.c.

References SCIP_Digraph::articulations, SCIP_Digraph::articulationscheck, SCIP_Digraph::blkmem, BMSallocBlockMemoryArray, BMSallocMemoryArray, BMSfreeBlockMemoryArray, BMSfreeMemoryArrayNull, FALSE, findArticulationPointsUtil(), SCIP_Digraph::narticulations, SCIP_Digraph::nnodes, NULL, SCIP_ALLOC, SCIP_Bool, SCIP_OKAY, and TRUE.

Referenced by buildBlockGraph(), and SCIPrealHashCode().

◆ SCIPdigraphComputeUndirectedComponents()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphComputeUndirectedComponents	(	SCIP_DIGRAPH *	digraph,
		int	minsize,
		int *	components,
		int *	ncomponents
	)

Compute undirected connected components on the given graph.

Note: For each arc, its reverse is added, so the graph does not need to be the directed representation of an undirected graph.

Parameters

digraph	directed graph
minsize	all components with less nodes are ignored
components	array with as many slots as there are nodes in the directed graph to store for each node the component to which it belongs (components are numbered 0 to ncomponents - 1); or NULL, if components are accessed one-by-one using SCIPdigraphGetComponent()
ncomponents	pointer to store the number of components; or NULL, if the number of components is accessed by SCIPdigraphGetNComponents()

Definition at line 7977 of file misc.c.

References SCIP_Digraph::blkmem, BMSallocBlockMemoryArray, BMSallocClearMemoryArray, BMSallocMemoryArray, BMSclearMemoryArray, BMScopyMemoryArray, BMSfreeMemoryArrayNull, BMSreallocBlockMemoryArray, SCIP_Digraph::components, SCIP_Digraph::componentstarts, SCIP_Digraph::componentstartsize, depthFirstSearch(), SCIP_Digraph::ncomponents, SCIP_Digraph::nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_ALLOC, SCIP_ALLOC_TERMINATE, SCIP_Bool, SCIP_CALL_TERMINATE, SCIP_OKAY, SCIPdigraphAddArc(), SCIPdigraphFreeComponents(), and SCIP_Digraph::successors.

Referenced by buildBlockGraph(), findComponents(), heurdataInit(), SCIPrealHashCode(), and sortGenVBounds().

◆ SCIPdigraphComputeDirectedComponents()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphComputeDirectedComponents	(	SCIP_DIGRAPH *	digraph,
		int	compidx,
		int *	strongcomponents,
		int *	strongcompstartidx,
		int *	nstrongcomponents
	)

Computes all strongly connected components of an undirected connected component with Tarjan's Algorithm. The resulting strongly connected components are sorted topologically (starting from the end of the strongcomponents array).

Note: In general a topological sort of the strongly connected components is not unique.

Parameters

digraph	directed graph
compidx	number of the undirected connected component
strongcomponents	array to store the strongly connected components (length >= size of the component)
strongcompstartidx	array to store the start indices of the strongly connected components (length >= size of the component)
nstrongcomponents	pointer to store the number of strongly connected components

Definition at line 8317 of file misc.c.

References BMSallocMemoryArray, BMSfreeMemoryArrayNull, SCIP_Digraph::components, SCIP_Digraph::componentstarts, FALSE, nnodes, SCIP_Digraph::nnodes, NULL, SCIP_ALLOC_TERMINATE, SCIP_Bool, SCIP_OKAY, SCIPdebugMessage, tarjan(), and TRUE.

Referenced by SCIPrealHashCode(), and sortGenVBounds().

◆ SCIPdigraphTopoSortComponents()

SCIP_EXPORT SCIP_RETCODE SCIPdigraphTopoSortComponents ( SCIP_DIGRAPH * digraph )

Performes an (almost) topological sort on the undirected components of the given directed graph. The undirected components should be computed before using SCIPdigraphComputeUndirectedComponents().

Note: In general a topological sort is not unique. Note, that there might be directed cycles, that are randomly broken, which is the reason for having only almost topologically sorted arrays.

Performs an (almost) topological sort on the undirected components of the given directed graph. The undirected components should be computed before using SCIPdigraphComputeUndirectedComponents().

Note: In general a topological sort is not unique. Note, that there might be directed cycles, that are randomly broken, which is the reason for having only almost topologically sorted arrays.

Parameters

digraph directed graph

Definition at line 8106 of file misc.c.

References BMSallocClearMemoryArray, BMSallocMemoryArray, BMSfreeMemoryArrayNull, SCIP_Digraph::components, SCIP_Digraph::componentstarts, depthFirstSearch(), SCIP_Digraph::ncomponents, SCIP_Digraph::nnodes, NULL, SCIP_ALLOC_TERMINATE, SCIP_Bool, and SCIP_OKAY.

Referenced by heurdataInit(), SCIPrealHashCode(), and sortGenVBounds().

◆ SCIPdigraphGetNComponents()

SCIP_EXPORT int SCIPdigraphGetNComponents ( SCIP_DIGRAPH * digraph )

returns the number of previously computed undirected components for the given directed graph

Parameters

digraph directed graph

Definition at line 8172 of file misc.c.

References SCIP_Digraph::componentstartsize, SCIP_Digraph::ncomponents, and NULL.

Referenced by buildBlockGraph(), heurdataInit(), SCIPrealHashCode(), sortComponents(), and sortGenVBounds().

◆ SCIPdigraphGetComponent()

SCIP_EXPORT void SCIPdigraphGetComponent	(	SCIP_DIGRAPH *	digraph,
		int	compidx,
		int **	nodes,
		int *	nnodes
	)

Returns the previously computed undirected component of the given number for the given directed graph. If the components were sorted using SCIPdigraphTopoSortComponents(), the component is (almost) topologically sorted.

Parameters

digraph	directed graph
compidx	number of the component to return
nodes	pointer to store the nodes in the component; or NULL, if not needed
nnodes	pointer to store the number of nodes in the component; or NULL, if not needed

Definition at line 8185 of file misc.c.

References SCIP_Digraph::components, SCIP_Digraph::componentstarts, and NULL.

Referenced by executeHeuristic(), SCIPrealHashCode(), sortComponents(), and sortGenVBounds().

◆ SCIPdigraphFreeComponents()

SCIP_EXPORT void SCIPdigraphFreeComponents ( SCIP_DIGRAPH * digraph )

frees the component information for the given directed graph

Parameters

digraph directed graph

Definition at line 8405 of file misc.c.

References SCIP_Digraph::blkmem, BMSfreeBlockMemoryArray, SCIP_Digraph::components, SCIP_Digraph::componentstarts, SCIP_Digraph::componentstartsize, SCIP_Digraph::ncomponents, SCIP_Digraph::nnodes, and NULL.

Referenced by SCIP_DECL_PROBDELORIG(), SCIP_DECL_PROBDELTRANS(), SCIP_DECL_SEPAEXECLP(), SCIPdigraphComputeUndirectedComponents(), SCIPdigraphFree(), and SCIPrealHashCode().

◆ SCIPdigraphPrint()

SCIP_EXPORT void SCIPdigraphPrint	(	SCIP_DIGRAPH *	digraph,
		SCIP_MESSAGEHDLR *	messagehdlr,
		FILE *	file
	)

output of the given directed graph via the given message handler

Parameters

digraph	directed graph
messagehdlr	message handler
file	output file (or NULL for standard output)

Definition at line 8437 of file misc.c.

References SCIP_Digraph::nnodes, SCIP_Digraph::nsuccessors, SCIPmessageFPrintInfo(), and SCIP_Digraph::successors.

Referenced by SCIPrealHashCode().

◆ SCIPdigraphPrintGml()

SCIP_EXPORT void SCIPdigraphPrintGml	(	SCIP_DIGRAPH *	digraph,
		FILE *	file
	)

prints the given directed graph structure in GML format into the given file

Parameters

digraph	directed graph
file	file to write to

Definition at line 8472 of file misc.c.

References SCIP_Digraph::nnodes, SCIP_Digraph::nsuccessors, NULL, SCIP_MAXSTRLEN, SCIPgmlWriteArc(), SCIPgmlWriteClosing(), SCIPgmlWriteNode(), SCIPgmlWriteOpening(), SCIPsnprintf(), SCIP_Digraph::successors, and TRUE.

Referenced by SCIP_DECL_READERREAD(), and SCIPrealHashCode().

◆ SCIPdigraphPrintComponents()

SCIP_EXPORT void SCIPdigraphPrintComponents	(	SCIP_DIGRAPH *	digraph,
		SCIP_MESSAGEHDLR *	messagehdlr,
		FILE *	file
	)

output of the given directed graph via the given message handler

Parameters

digraph	directed graph
messagehdlr	message handler
file	output file (or NULL for standard output)

Definition at line 8511 of file misc.c.

References SCIP_Digraph::components, SCIP_Digraph::componentstarts, SCIP_Digraph::ncomponents, and SCIPmessageFPrintInfo().

Referenced by heurdataInit(), and SCIPrealHashCode().

◆ SCIPcreateDigraph()

SCIP_EXPORT SCIP_RETCODE SCIPcreateDigraph	(	SCIP *	scip,
		SCIP_DIGRAPH **	digraph,
		int	nnodes
	)

creates directed graph structure

Parameters

scip	SCIP data structure
digraph	pointer to store the created directed graph
nnodes	number of nodes

Definition at line 608 of file scip_datastructures.c.

References Scip::mem, NULL, SCIP_Mem::probmem, SCIP_CALL, SCIP_OKAY, and SCIPdigraphCreate().

Referenced by addBranchingComplementaritiesSOS1(), buildBlockGraph(), enforceConflictgraph(), findComponents(), getPrecedence(), initConflictgraph(), initImplGraphSOS1(), presolRoundConssSOS1(), presolRoundVarsSOS1(), readFile(), SCIP_DECL_SEPAEXECLP(), SCIPcreateProbCyc(), sortGenVBounds(), and tightenVarsBoundsSOS1().

◆ SCIPcopyDigraph()

SCIP_EXPORT SCIP_RETCODE SCIPcopyDigraph	(	SCIP *	scip,
		SCIP_DIGRAPH **	targetdigraph,
		SCIP_DIGRAPH *	sourcedigraph
	)

! [SnippetCodeStyleComment] copies directed graph structure

The copying procedure uses the memory of the passed SCIP instance. The user must ensure that the digraph lives as most as long as the SCIP instance.

Note: The data in nodedata is copied verbatim. This possibly has to be adapted by the user.

copies directed graph structure

The copying procedure uses the memory of the passed SCIP instance. The user must ensure that the digraph lives as most as long as the SCIP instance.

Note: The data in nodedata is copied verbatim. This possibly has to be adapted by the user.

Parameters

scip	SCIP data structure
targetdigraph	pointer to store the copied directed graph
sourcedigraph	source directed graph

Definition at line 629 of file scip_datastructures.c.

References Scip::mem, NULL, SCIP_Mem::probmem, SCIP_CALL, SCIP_OKAY, and SCIPdigraphCopy().

Referenced by heurdataInit(), SCIP_DECL_PROBCOPY(), and SCIP_DECL_PROBTRANS().

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIPdigraphResize()

◆ SCIPdigraphSetSizes()

◆ SCIPdigraphFree()

◆ SCIPdigraphAddArc()

◆ SCIPdigraphAddArcSafe()

◆ SCIPdigraphSetNSuccessors()

◆ SCIPdigraphGetNNodes()

◆ SCIPdigraphGetNodeData()

◆ SCIPdigraphSetNodeData()

◆ SCIPdigraphGetNArcs()

◆ SCIPdigraphGetNSuccessors()

◆ SCIPdigraphGetSuccessors()

◆ SCIPdigraphGetSuccessorsData()

◆ SCIPdigraphGetArticulationPoints()

◆ SCIPdigraphComputeUndirectedComponents()

◆ SCIPdigraphComputeDirectedComponents()

◆ SCIPdigraphTopoSortComponents()

◆ SCIPdigraphGetNComponents()

◆ SCIPdigraphGetComponent()

◆ SCIPdigraphFreeComponents()

◆ SCIPdigraphPrint()

◆ SCIPdigraphPrintGml()

◆ SCIPdigraphPrintComponents()

◆ SCIPcreateDigraph()

◆ SCIPcopyDigraph()