GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r72103
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Pages
graph.h File Reference
#include "heap.h"
#include "tree.h"
Include dependency graph for graph.h:
This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  _dglSPClipInput
 
struct  _dglSPClipOutput
 
struct  _dglSpanClipInput
 
struct  _dglSpanClipOutput
 
struct  dglNodePrioritizer_s
 
struct  dglEdgePrioritizer_s
 
struct  _dglGraph
 
struct  _dglSPArc
 
struct  _dglSPReport
 
struct  dglSPCache_s
 
struct  dglNodeTraverser_s
 
struct  dglEdgesetTraverser_s
 
struct  dglEdgeTraverser_s
 
struct  dglIOContext_s
 

Macros

#define DGL_GS_FLAT   0x1 /* otherwise is TREE */
 
#define DGL_GF_COMPLETE   0x1
 
#define DGL_GF_BIPARTITE   0x2
 
#define DGL_GF_REGULAR   0x4
 
#define DGL_GF_BOUQUET   0x8
 
#define DGL_GF_DIPOLE   0x10
 
#define DGL_GF_PATH   0x20
 
#define DGL_GF_CYCLE   0x40
 
#define DGL_GO_EdgePrioritize_COST   0x10
 
#define DGL_GO_EdgePrioritize_ATTR   0x20
 
#define DGL_GO_NodePrioritize_ATTR   0x40
 
#define DGL_NS_HEAD   0x1 /* node exists as at least one edge's head (static) */
 
#define DGL_NS_TAIL   0x2 /* node exists as at least one edge's tail (static) */
 
#define DGL_NS_ALONE   0x4 /* node is a component */
 
#define DGL_ES_DIRECTED   0x1 /* force edge to be directed */
 
#define DGL_ENDIAN_BIG   1
 
#define DGL_ENDIAN_LITTLE   2
 
#define DGL_STRONGCONNECT   0x1
 
#define DGL_ALONE   0x2
 
#define DGL_MERGE_EDGE   0x4
 
#define DGL_ERR_BadVersion   1
 
#define DGL_ERR_BadNodeType   2
 
#define DGL_ERR_MemoryExhausted   3
 
#define DGL_ERR_HeapError   4
 
#define DGL_ERR_UndefinedMethod   5
 
#define DGL_ERR_Write   6
 
#define DGL_ERR_Read   7
 
#define DGL_ERR_NotSupported   8
 
#define DGL_ERR_UnknownByteOrder   9
 
#define DGL_ERR_HeadNodeNotFound   10
 
#define DGL_ERR_TailNodeNotFound   11
 
#define DGL_ERR_BadEdge   12
 
#define DGL_ERR_BadOnFlatGraph   13
 
#define DGL_ERR_BadOnTreeGraph   14
 
#define DGL_ERR_NodeNotFound   15
 
#define DGL_ERR_TreeSearchError   16
 
#define DGL_ERR_UnexpectedNullPointer   17
 
#define DGL_ERR_VersionNotSupported   18
 
#define DGL_ERR_EdgeNotFound   19
 
#define DGL_ERR_NodeAlreadyExist   20
 
#define DGL_ERR_NodeIsAComponent   21
 
#define DGL_ERR_EdgeAlreadyExist   22
 
#define DGL_ERR_BadArgument   23
 

Typedefs

typedef struct _dglSPClipInput dglSPClipInput_s
 
typedef struct _dglSPClipOutput dglSPClipOutput_s
 
typedef struct _dglSpanClipInput dglSpanClipInput_s
 
typedef struct _dglSpanClipOutput dglSpanClipOutput_s
 
typedef struct _dglGraph dglGraph_s
 
typedef int(* dglSPClip_fn )(dglGraph_s *, dglSPClipInput_s *, dglSPClipOutput_s *, void *)
 
typedef int(* dglSpanClip_fn )(dglGraph_s *, dglGraph_s *, dglSpanClipInput_s *, dglSpanClipOutput_s *, void *)
 
typedef struct _dglSPArc dglSPArc_s
 
typedef struct _dglSPReport dglSPReport_s
 
typedef int(* dglWriteChunk_fn )(dglGraph_s *, unsigned char *pbChunk, int cbChunk, void *pvArg)
 

Functions

int dglInitialize (dglGraph_s *pGraph, dglByte_t Version, dglInt32_t NodeAttrSize, dglInt32_t EdgeAttrSize, dglInt32_t *pOpaqueSet)
 
int dglRelease (dglGraph_s *pGraph)
 
int dglUnflatten (dglGraph_s *pGraph)
 
int dglFlatten (dglGraph_s *pGraph)
 
void dglResetStats (dglGraph_s *pgraph)
 
dglInt32_tdglGetNode (dglGraph_s *pGraph, dglInt32_t nNodeId)
 
int dglAddNode (dglGraph_s *pGraph, dglInt32_t nNodeId, void *pvNodeAttr, dglInt32_t nFlags)
 
int dglDelNode (dglGraph_s *pGraph, dglInt32_t nNodeId)
 
dglInt32_t dglNodeGet_Id (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
dglInt32_tdglNodeGet_OutEdgeset (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
dglInt32_tdglNodeGet_InEdgeset (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
dglInt32_t dglNodeGet_Status (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
dglInt32_tdglNodeGet_Attr (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
void dglNodeSet_Attr (dglGraph_s *pGraph, dglInt32_t *pnNode, dglInt32_t *pnAttr)
 
int dglNodeGet_InDegree (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
int dglNodeGet_OutDegree (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
int dglNodeGet_Valence (dglGraph_s *pGraph, dglInt32_t *pnNode)
 
dglInt32_t dglEdgesetGet_EdgeCount (dglGraph_s *pGraph, dglInt32_t *pnOutEdgeset)
 
dglInt32_t dglEdgeGet_Id (dglGraph_s *pGraph, dglInt32_t *pnEdge)
 
dglInt32_t dglEdgeGet_Cost (dglGraph_s *pGraph, dglInt32_t *pnEdge)
 
dglInt32_tdglEdgeGet_Head (dglGraph_s *pGraph, dglInt32_t *pnEdge)
 
dglInt32_tdglEdgeGet_Tail (dglGraph_s *pGraph, dglInt32_t *pnEdge)
 
dglInt32_tdglEdgeGet_Attr (dglGraph_s *pGraph, dglInt32_t *pnEdge)
 
int dglEdgeSet_Attr (dglGraph_s *pGraph, dglInt32_t *pnAttr, dglInt32_t *pnEdge)
 
dglInt32_tdglGetEdge (dglGraph_s *pGraph, dglInt32_t nEdgeId)
 
int dglDelEdge (dglGraph_s *pGraph, dglInt32_t nEdgeId)
 
int dglAddEdge (dglGraph_s *pGraph, dglInt32_t nHead, dglInt32_t nTail, dglInt32_t nCost, dglInt32_t nEdge)
 
int dglAddEdgeX (dglGraph_s *pGraph, dglInt32_t nHead, dglInt32_t nTail, dglInt32_t nCost, dglInt32_t nEdge, void *pvFnodeAttr, void *pvTnodeAttr, void *pvEdgeAttr, dglInt32_t nFlags)
 
int dglWrite (dglGraph_s *pGraph, int fd)
 
int dglRead (dglGraph_s *pGraph, int fd)
 
int dglIOContextInitialize (dglGraph_s *, dglIOContext_s *)
 
void dglIOContextRelease (dglIOContext_s *)
 
int dglWriteChunk (dglIOContext_s *, dglWriteChunk_fn, void *pvArg)
 
int dglReadChunk (dglIOContext_s *, dglByte_t *pbChunk, int cbChunk)
 
int dglShortestPath (dglGraph_s *pGraph, dglSPReport_s **ppReport, dglInt32_t nStartNode, dglInt32_t nDestinationNode, dglSPClip_fn fnClip, void *pvClipArg, dglSPCache_s *pCache)
 
int dglShortestPathGraph (dglGraph_s *pGraph, dglGraph_s *pGraphOut, dglInt32_t nStartNode, dglInt32_t nDestinationNode, dglSPClip_fn fnClip, void *pvClipArg, dglSPCache_s *pCache)
 
int dglShortestDistance (dglGraph_s *pGraph, dglInt32_t *pnDistance, dglInt32_t nStartNode, dglInt32_t nDestinationNode, dglSPClip_fn fnClip, void *pvClipArg, dglSPCache_s *pCache)
 
int dglShortestDistanceGraph (dglGraph_s *pGraph, dglGraph_s *pGraphOut, dglInt32_t nStartNode, dglInt32_t nDestinationNode, dglSPClip_fn fnClip, void *pvClipArg, dglSPCache_s *pCache)
 
int dglInitializeSPCache (dglGraph_s *pgraph, dglSPCache_s *pCache)
 
void dglReleaseSPCache (dglGraph_s *pgraph, dglSPCache_s *pCache)
 
void dglFreeSPReport (dglGraph_s *pGraph, dglSPReport_s *pSPReport)
 
int dglDepthSpanning (dglGraph_s *pgraphInput, dglGraph_s *pgraphOutput, dglInt32_t nVertexNode, dglSpanClip_fn fnClip, void *pvClipArg)
 
int dglDepthComponents (dglGraph_s *pgraphInput, dglGraph_s *pgraphComponents, int cgraphComponents, dglSpanClip_fn fnClip, void *pvClipArg)
 
int dglMinimumSpanning (dglGraph_s *pgraphInput, dglGraph_s *pgraphOutput, dglInt32_t nVertexNode, dglSpanClip_fn fnClip, void *pvClipArg)
 
int dglErrno (dglGraph_s *pgraph)
 
char * dglStrerror (dglGraph_s *pgraph)
 
int dglGet_Version (dglGraph_s *pGraph)
 
void dglSet_Version (dglGraph_s *pGraph, int Version)
 
int dglGet_Endianess (dglGraph_s *pGraph)
 
int dglGet_NodeAttrSize (dglGraph_s *pGraph)
 
int dglGet_EdgeAttrSize (dglGraph_s *pGraph)
 
int dglGet_NodeCount (dglGraph_s *pGraph)
 
int dglGet_HeadNodeCount (dglGraph_s *pGraph)
 
int dglGet_TailNodeCount (dglGraph_s *pGraph)
 
int dglGet_AloneNodeCount (dglGraph_s *pGraph)
 
int dglGet_EdgeCount (dglGraph_s *pGraph)
 
int dglGet_State (dglGraph_s *pGraph)
 
dglInt32_tdglGet_Opaque (dglGraph_s *pGraph)
 
void dglSet_Opaque (dglGraph_s *pGraph, dglInt32_t *pOpaque)
 
int dglGet_NodeSize (dglGraph_s *pGraph)
 
int dglGet_EdgeSize (dglGraph_s *pGraph)
 
dglInt64_t dglGet_Cost (dglGraph_s *pGraph)
 
void dglSet_Cost (dglGraph_s *pGraph, dglInt64_t nnCost)
 
dglInt32_t dglGet_Family (dglGraph_s *pGraph)
 
void dglSet_Family (dglGraph_s *pGraph, dglInt32_t nFamily)
 
dglInt32_t dglGet_Options (dglGraph_s *pGraph)
 
void dglSet_Options (dglGraph_s *pGraph, dglInt32_t nOptions)
 
dglEdgePrioritizer_sdglGet_EdgePrioritizer (dglGraph_s *pGraph)
 
dglNodePrioritizer_sdglGet_NodePrioritizer (dglGraph_s *pGraph)
 
int dglNode_T_Initialize (dglNodeTraverser_s *pTraverser, dglGraph_s *pGraph)
 
void dglNode_T_Release (dglNodeTraverser_s *pTraverser)
 
dglInt32_tdglNode_T_First (dglNodeTraverser_s *pTraverser)
 
dglInt32_tdglNode_T_Last (dglNodeTraverser_s *pTraverser)
 
dglInt32_tdglNode_T_Next (dglNodeTraverser_s *pTraverser)
 
dglInt32_tdglNode_T_Prev (dglNodeTraverser_s *pTraverser)
 
dglInt32_tdglNode_T_Find (dglNodeTraverser_s *pTraverser, dglInt32_t nNodeId)
 
int dglEdgeset_T_Initialize (dglEdgesetTraverser_s *pTraverser, dglGraph_s *pGraph, dglInt32_t *pnEdgeset)
 
void dglEdgeset_T_Release (dglEdgesetTraverser_s *pTraverser)
 
dglInt32_tdglEdgeset_T_First (dglEdgesetTraverser_s *pTraverser)
 
dglInt32_tdglEdgeset_T_Next (dglEdgesetTraverser_s *pTraverser)
 
int dglEdge_T_Initialize (dglEdgeTraverser_s *pTraverser, dglGraph_s *pGraph, dglEdgePrioritizer_s *pEdgePrioritizer)
 
void dglEdge_T_Release (dglEdgeTraverser_s *pTraverser)
 
dglInt32_tdglEdge_T_First (dglEdgeTraverser_s *pTraverser)
 
dglInt32_tdglEdge_T_Next (dglEdgeTraverser_s *pTraverser)
 

Macro Definition Documentation

#define DGL_ALONE   0x2

Definition at line 83 of file graph.h.

#define DGL_ENDIAN_BIG   1

Definition at line 74 of file graph.h.

Referenced by dgl_read_V1(), dgl_read_V2(), dglInitialize(), and dglReadChunk().

#define DGL_ENDIAN_LITTLE   2

Definition at line 75 of file graph.h.

Referenced by dgl_read_V1(), dgl_read_V2(), dglInitialize(), and dglReadChunk().

#define DGL_ERR_BadArgument   23

Definition at line 303 of file graph.h.

Referenced by dglInitialize(), and dglStrerror().

#define DGL_ERR_BadEdge   12

Definition at line 292 of file graph.h.

Referenced by DGL_SPAN_MINIMUM_SPANNING_FUNC(), and dglStrerror().

#define DGL_ERR_BadNodeType   2

Definition at line 282 of file graph.h.

Referenced by dglStrerror().

#define DGL_ERR_BadOnFlatGraph   13
#define DGL_ERR_BadOnTreeGraph   14

Definition at line 294 of file graph.h.

Referenced by DGL_UNFLATTEN_FUNC(), and dglStrerror().

#define DGL_ERR_EdgeAlreadyExist   22

Definition at line 302 of file graph.h.

Referenced by DGL_ADD_EDGE_FUNC(), and dglStrerror().

#define DGL_ERR_EdgeNotFound   19

Definition at line 299 of file graph.h.

Referenced by DGL_DEL_EDGE_FUNC(), and dglStrerror().

#define DGL_ERR_HeadNodeNotFound   10
#define DGL_ERR_HeapError   4

Definition at line 284 of file graph.h.

Referenced by DGL_SPAN_MINIMUM_SPANNING_FUNC(), and dglStrerror().

#define DGL_ERR_NodeAlreadyExist   20

Definition at line 300 of file graph.h.

Referenced by DGL_ADD_NODE_FUNC(), and dglStrerror().

#define DGL_ERR_NodeIsAComponent   21

Definition at line 301 of file graph.h.

Referenced by DGL_GET_NODE_INEDGESET_FUNC(), DGL_GET_NODE_OUTEDGESET_FUNC(), and dglStrerror().

#define DGL_ERR_NodeNotFound   15

Definition at line 295 of file graph.h.

Referenced by DGL_DEL_NODE_FUNC(), and dglStrerror().

#define DGL_ERR_Read   7

Definition at line 287 of file graph.h.

Referenced by dgl_read_V1(), dgl_read_V2(), dglRead(), and dglStrerror().

#define DGL_ERR_TailNodeNotFound   11

Definition at line 291 of file graph.h.

Referenced by DGL_FLATTEN_FUNC(), and dglStrerror().

#define DGL_ERR_TreeSearchError   16

Definition at line 296 of file graph.h.

Referenced by dglStrerror().

#define DGL_ERR_UndefinedMethod   5

Definition at line 285 of file graph.h.

Referenced by dglStrerror().

#define DGL_ERR_UnknownByteOrder   9

Definition at line 289 of file graph.h.

Referenced by dglStrerror().

#define DGL_ERR_VersionNotSupported   18

Definition at line 298 of file graph.h.

Referenced by dglInitialize(), dglRead(), and dglStrerror().

#define DGL_ERR_Write   6

Definition at line 286 of file graph.h.

Referenced by dgl_write_V1(), dgl_write_V2(), and dglStrerror().

#define DGL_ES_DIRECTED   0x1 /* force edge to be directed */
#define DGL_GF_BIPARTITE   0x2

Definition at line 42 of file graph.h.

#define DGL_GF_BOUQUET   0x8

Definition at line 44 of file graph.h.

#define DGL_GF_COMPLETE   0x1

Definition at line 41 of file graph.h.

#define DGL_GF_CYCLE   0x40

Definition at line 47 of file graph.h.

#define DGL_GF_DIPOLE   0x10

Definition at line 45 of file graph.h.

#define DGL_GF_PATH   0x20

Definition at line 46 of file graph.h.

#define DGL_GF_REGULAR   0x4

Definition at line 43 of file graph.h.

#define DGL_GO_EdgePrioritize_ATTR   0x20

Definition at line 53 of file graph.h.

#define DGL_GO_EdgePrioritize_COST   0x10

Definition at line 52 of file graph.h.

Referenced by DGL_ADD_EDGE_FUNC(), DGL_DEL_EDGE_FUNC(), and DGL_DEL_NODE_FUNC().

#define DGL_GO_NodePrioritize_ATTR   0x40

Definition at line 54 of file graph.h.

#define DGL_MERGE_EDGE   0x4

Definition at line 84 of file graph.h.

#define DGL_NS_HEAD   0x1 /* node exists as at least one edge's head (static) */
#define DGL_NS_TAIL   0x2 /* node exists as at least one edge's tail (static) */
#define DGL_STRONGCONNECT   0x1

Definition at line 82 of file graph.h.

Referenced by DGL_ADD_EDGE_FUNC().

Typedef Documentation

typedef struct _dglGraph dglGraph_s
typedef int(* dglSpanClip_fn)(dglGraph_s *, dglGraph_s *, dglSpanClipInput_s *, dglSpanClipOutput_s *, void *)

Definition at line 204 of file graph.h.

typedef struct _dglSPArc dglSPArc_s
typedef int(* dglSPClip_fn)(dglGraph_s *, dglSPClipInput_s *, dglSPClipOutput_s *, void *)

Definition at line 198 of file graph.h.

typedef struct _dglSPReport dglSPReport_s
typedef int(* dglWriteChunk_fn)(dglGraph_s *, unsigned char *pbChunk, int cbChunk, void *pvArg)

Definition at line 390 of file graph.h.

Function Documentation

int dglAddEdgeX ( dglGraph_s pGraph,
dglInt32_t  nHead,
dglInt32_t  nTail,
dglInt32_t  nCost,
dglInt32_t  nEdge,
void *  pvFnodeAttr,
void *  pvTnodeAttr,
void *  pvEdgeAttr,
dglInt32_t  nFlags 
)
int dglAddNode ( dglGraph_s pGraph,
dglInt32_t  nNodeId,
void *  pvNodeAttr,
dglInt32_t  nFlags 
)
int dglDelEdge ( dglGraph_s pGraph,
dglInt32_t  nEdgeId 
)
int dglDelNode ( dglGraph_s pGraph,
dglInt32_t  nNodeId 
)
int dglEdge_T_Initialize ( dglEdgeTraverser_s pTraverser,
dglGraph_s pGraph,
dglEdgePrioritizer_s pEdgePrioritizer 
)
int dglErrno ( dglGraph_s pgraph)

Definition at line 1155 of file vector/dglib/graph.c.

References _dglGraph::iErrno.

void dglFreeSPReport ( dglGraph_s pGraph,
dglSPReport_s pSPReport 
)
int dglGet_AloneNodeCount ( dglGraph_s pGraph)

Definition at line 1256 of file vector/dglib/graph.c.

References _dglGraph::cAlone.

dglInt64_t dglGet_Cost ( dglGraph_s pGraph)

Definition at line 1311 of file vector/dglib/graph.c.

References _dglGraph::nnCost.

int dglGet_EdgeAttrSize ( dglGraph_s pGraph)
int dglGet_EdgeCount ( dglGraph_s pGraph)
dglEdgePrioritizer_s* dglGet_EdgePrioritizer ( dglGraph_s pGraph)

Definition at line 1341 of file vector/dglib/graph.c.

References _dglGraph::edgePrioritizer.

int dglGet_Endianess ( dglGraph_s pGraph)

Definition at line 1226 of file vector/dglib/graph.c.

References _dglGraph::Endian.

dglInt32_t dglGet_Family ( dglGraph_s pGraph)

Definition at line 1321 of file vector/dglib/graph.c.

References _dglGraph::nFamily.

int dglGet_HeadNodeCount ( dglGraph_s pGraph)

Definition at line 1246 of file vector/dglib/graph.c.

References _dglGraph::cHead.

dglNodePrioritizer_s* dglGet_NodePrioritizer ( dglGraph_s pGraph)

Definition at line 1346 of file vector/dglib/graph.c.

References _dglGraph::nodePrioritizer.

dglInt32_t* dglGet_Opaque ( dglGraph_s pGraph)
dglInt32_t dglGet_Options ( dglGraph_s pGraph)

Definition at line 1331 of file vector/dglib/graph.c.

References _dglGraph::nOptions.

int dglGet_State ( dglGraph_s pGraph)

Definition at line 1266 of file vector/dglib/graph.c.

References _dglGraph::Flags.

int dglGet_TailNodeCount ( dglGraph_s pGraph)

Definition at line 1251 of file vector/dglib/graph.c.

References _dglGraph::cTail.

int dglGet_Version ( dglGraph_s pGraph)

Definition at line 1217 of file vector/dglib/graph.c.

References _dglGraph::Version.

Referenced by dglDepthComponents(), dglDepthSpanning(), and dglMinimumSpanning().

dglInt32_t* dglGetEdge ( dglGraph_s pGraph,
dglInt32_t  nEdgeId 
)
void dglIOContextRelease ( dglIOContext_s )

Definition at line 1573 of file vector/dglib/graph.c.

dglInt32_t* dglNode_T_Last ( dglNodeTraverser_s pTraverser)
dglInt32_t* dglNode_T_Prev ( dglNodeTraverser_s pTraverser)
void dglNodeSet_Attr ( dglGraph_s pGraph,
dglInt32_t pnNode,
dglInt32_t pnAttr 
)
int dglRead ( dglGraph_s pGraph,
int  fd 
)
void dglReleaseSPCache ( dglGraph_s pgraph,
dglSPCache_s pCache 
)
void dglResetStats ( dglGraph_s pgraph)

Definition at line 43 of file vector/dglib/graph.c.

void dglSet_Cost ( dglGraph_s pGraph,
dglInt64_t  nnCost 
)

Definition at line 1316 of file vector/dglib/graph.c.

References _dglGraph::nnCost.

void dglSet_Family ( dglGraph_s pGraph,
dglInt32_t  nFamily 
)

Definition at line 1326 of file vector/dglib/graph.c.

References _dglGraph::nFamily.

void dglSet_Opaque ( dglGraph_s pGraph,
dglInt32_t pOpaque 
)

Definition at line 1276 of file vector/dglib/graph.c.

References _dglGraph::aOpaqueSet.

void dglSet_Options ( dglGraph_s pGraph,
dglInt32_t  nOptions 
)

Definition at line 1336 of file vector/dglib/graph.c.

References _dglGraph::nOptions.

void dglSet_Version ( dglGraph_s pGraph,
int  Version 
)

Definition at line 1221 of file vector/dglib/graph.c.

References _dglGraph::Version.

int dglShortestDistance ( dglGraph_s pGraph,
dglInt32_t pnDistance,
dglInt32_t  nStartNode,
dglInt32_t  nDestinationNode,
dglSPClip_fn  fnClip,
void *  pvClipArg,
dglSPCache_s pCache 
)
int dglShortestDistanceGraph ( dglGraph_s pGraph,
dglGraph_s pGraphOut,
dglInt32_t  nStartNode,
dglInt32_t  nDestinationNode,
dglSPClip_fn  fnClip,
void *  pvClipArg,
dglSPCache_s pCache 
)
int dglShortestPath ( dglGraph_s pGraph,
dglSPReport_s **  ppReport,
dglInt32_t  nStartNode,
dglInt32_t  nDestinationNode,
dglSPClip_fn  fnClip,
void *  pvClipArg,
dglSPCache_s pCache 
)
int dglShortestPathGraph ( dglGraph_s pGraph,
dglGraph_s pGraphOut,
dglInt32_t  nStartNode,
dglInt32_t  nDestinationNode,
dglSPClip_fn  fnClip,
void *  pvClipArg,
dglSPCache_s pCache 
)
int dglUnflatten ( dglGraph_s pGraph)
int dglWrite ( dglGraph_s pGraph,
int  fd 
)