1 /* $Id: is.h,v 1.34 1997/05/23 18:39:08 balay Exp bsmith $ */ 2 3 /* 4 An index set is a generalization of a subset of integers. Index sets 5 are used for defining scatters and gathers. 6 */ 7 #if !defined(__IS_PACKAGE) 8 #define __IS_PACKAGE 9 #include "petsc.h" 10 11 #define IS_COOKIE PETSC_COOKIE+2 12 13 typedef struct _p_IS* IS; 14 15 /* 16 Default index set data structures that PETSc provides. 17 */ 18 typedef enum {IS_GENERAL=0, IS_STRIDE=1, IS_BLOCK = 2} ISType; 19 extern int ISCreateGeneral(MPI_Comm,int,int *,IS *); 20 extern int ISCreateBlock(MPI_Comm,int,int,int *,IS *); 21 extern int ISCreateStride(MPI_Comm,int,int,int,IS *); 22 23 extern int ISDestroy(IS); 24 25 extern int ISSetPermutation(IS); 26 extern int ISPermutation(IS,PetscTruth*); 27 extern int ISSetIdentity(IS); 28 extern int ISIdentity(IS,PetscTruth*); 29 30 extern int ISGetIndices(IS,int **); 31 extern int ISRestoreIndices(IS,int **); 32 extern int ISGetSize(IS,int *); 33 extern int ISInvertPermutation(IS,IS*); 34 extern int ISView(IS,Viewer); 35 extern int ISEqual(IS, IS, PetscTruth *); 36 extern int ISSort(IS); 37 extern int ISSorted(IS, PetscTruth *); 38 39 extern int ISBlock(IS,PetscTruth*); 40 extern int ISBlockGetIndices(IS,int **); 41 extern int ISBlockRestoreIndices(IS,int **); 42 extern int ISBlockGetSize(IS,int *); 43 extern int ISBlockGetBlockSize(IS,int *); 44 45 extern int ISStride(IS,PetscTruth*); 46 extern int ISStrideGetInfo(IS,int *,int*); 47 48 /* --------------------------------------------------------------------------*/ 49 50 /* 51 ISLocalToGlobalMappings are mappings from an arbitrary 52 local ordering from 0 to n-1 to a global PETSc ordering 53 used by a vector or matrix 54 */ 55 struct _p_ISLocalToGlobalMapping{ 56 int n; 57 int *indices; 58 int refcnt; 59 }; 60 typedef struct _p_ISLocalToGlobalMapping* ISLocalToGlobalMapping; 61 62 extern int ISLocalToGlobalMappingCreate(int, int*, ISLocalToGlobalMapping*); 63 extern int ISLocalToGlobalMappingDestroy(ISLocalToGlobalMapping); 64 #define ISLocalToGlobalMappingApply(mp,N,in,out) \ 65 {\ 66 int _i,*_idx = mp->indices; \ 67 for ( _i=0; _i<N; _i++ ) { \ 68 out[_i] = _idx[in[_i]]; \ 69 }\ 70 } 71 #define ISLocalToGlobalMappingReference(mp) mp->refcnt++; 72 extern int ISLocalToGlobalMappingApplyIS(ISLocalToGlobalMapping,IS,IS*); 73 74 /* --------------------------------------------------------------------------*/ 75 76 /* 77 ISColorings are sets of IS's that define a coloring 78 of the underlying indices 79 */ 80 struct _p_ISColoring { 81 int n; 82 IS *is; 83 MPI_Comm comm; 84 }; 85 typedef struct _p_ISColoring* ISColoring; 86 87 extern int ISColoringDestroy(ISColoring); 88 extern int ISColoringView(ISColoring,Viewer); 89 extern int ISColoringCreate(MPI_Comm,int,int*,ISColoring*); 90 91 #endif 92 93 94 95 96