1 #include <petscis.h> /*I "petscis.h" I*/ 2 #include <petsc/private/isimpl.h> 3 #include <petsc/private/viewerimpl.h> 4 #include <petsclayouthdf5.h> 5 6 PetscErrorCode ISView_Binary(IS is, PetscViewer viewer) 7 { 8 PetscBool skipHeader; 9 PetscLayout map; 10 PetscInt tr[2], n, s, N; 11 const PetscInt *iarray; 12 13 PetscFunctionBegin; 14 PetscCall(PetscViewerSetUp(viewer)); 15 PetscCall(PetscViewerBinaryGetSkipHeader(viewer, &skipHeader)); 16 17 PetscCall(ISGetLayout(is, &map)); 18 PetscCall(PetscLayoutGetLocalSize(map, &n)); 19 PetscCall(PetscLayoutGetRange(map, &s, NULL)); 20 PetscCall(PetscLayoutGetSize(map, &N)); 21 22 /* write IS header */ 23 tr[0] = IS_FILE_CLASSID; 24 tr[1] = N; 25 if (!skipHeader) PetscCall(PetscViewerBinaryWrite(viewer, tr, 2, PETSC_INT)); 26 27 /* write IS indices */ 28 PetscCall(ISGetIndices(is, &iarray)); 29 PetscCall(PetscViewerBinaryWriteAll(viewer, iarray, n, s, N, PETSC_INT)); 30 PetscCall(ISRestoreIndices(is, &iarray)); 31 PetscFunctionReturn(PETSC_SUCCESS); 32 } 33 34 #if defined(PETSC_HAVE_HDF5) 35 /* 36 This should handle properly the cases where PetscInt is 32 or 64 and hsize_t is 32 or 64. These means properly casting with 37 checks back and forth between the two types of variables. 38 */ 39 static PetscErrorCode ISLoad_HDF5(IS is, PetscViewer viewer) 40 { 41 hid_t inttype; /* int type (H5T_NATIVE_INT or H5T_NATIVE_LLONG) */ 42 PetscInt *ind; 43 const char *isname; 44 45 PetscFunctionBegin; 46 PetscCheck(((PetscObject)is)->name, PetscObjectComm((PetscObject)is), PETSC_ERR_SUP, "IS name must be given using PetscObjectSetName() before ISLoad() since HDF5 can store multiple objects in a single file"); 47 #if defined(PETSC_USE_64BIT_INDICES) 48 inttype = H5T_NATIVE_LLONG; 49 #else 50 inttype = H5T_NATIVE_INT; 51 #endif 52 PetscCall(PetscObjectGetName((PetscObject)is, &isname)); 53 PetscCall(PetscViewerHDF5Load(viewer, isname, is->map, inttype, (void **)&ind)); 54 PetscCall(ISGeneralSetIndices(is, is->map->n, ind, PETSC_OWN_POINTER)); 55 PetscFunctionReturn(PETSC_SUCCESS); 56 } 57 #endif 58 59 static PetscErrorCode ISLoad_Binary(IS is, PetscViewer viewer) 60 { 61 PetscBool isgeneral, skipHeader; 62 PetscInt tr[2], rows, N, n, s, *idx; 63 PetscLayout map; 64 65 PetscFunctionBegin; 66 PetscCall(PetscObjectTypeCompare((PetscObject)is, ISGENERAL, &isgeneral)); 67 PetscCheck(isgeneral, PetscObjectComm((PetscObject)is), PETSC_ERR_ARG_INCOMP, "IS must be of type ISGENERAL to load into it"); 68 PetscCall(PetscViewerSetUp(viewer)); 69 PetscCall(PetscViewerBinaryGetSkipHeader(viewer, &skipHeader)); 70 71 PetscCall(ISGetLayout(is, &map)); 72 PetscCall(PetscLayoutGetSize(map, &N)); 73 74 /* read IS header */ 75 if (!skipHeader) { 76 PetscCall(PetscViewerBinaryRead(viewer, tr, 2, NULL, PETSC_INT)); 77 PetscCheck(tr[0] == IS_FILE_CLASSID, PetscObjectComm((PetscObject)viewer), PETSC_ERR_FILE_UNEXPECTED, "Not an IS next in file"); 78 PetscCheck(tr[1] >= 0, PetscObjectComm((PetscObject)viewer), PETSC_ERR_FILE_UNEXPECTED, "IS size (%" PetscInt_FMT ") in file is negative", tr[1]); 79 PetscCheck(N < 0 || N == tr[1], PETSC_COMM_SELF, PETSC_ERR_FILE_UNEXPECTED, "IS in file different size (%" PetscInt_FMT ") than input IS (%" PetscInt_FMT ")", tr[1], N); 80 rows = tr[1]; 81 } else { 82 PetscCheck(N >= 0, PETSC_COMM_SELF, PETSC_ERR_USER, "IS binary file header was skipped, thus the user must specify the global size of input IS"); 83 rows = N; 84 } 85 86 /* set IS size if not already set */ 87 if (N < 0) PetscCall(PetscLayoutSetSize(map, rows)); 88 PetscCall(PetscLayoutSetUp(map)); 89 90 /* get IS sizes and check global size */ 91 PetscCall(PetscLayoutGetSize(map, &N)); 92 PetscCall(PetscLayoutGetLocalSize(map, &n)); 93 PetscCall(PetscLayoutGetRange(map, &s, NULL)); 94 PetscCheck(N == rows, PETSC_COMM_SELF, PETSC_ERR_FILE_UNEXPECTED, "IS in file different size (%" PetscInt_FMT ") than input IS (%" PetscInt_FMT ")", rows, N); 95 96 /* read IS indices */ 97 PetscCall(PetscMalloc1(n, &idx)); 98 PetscCall(PetscViewerBinaryReadAll(viewer, idx, n, s, N, PETSC_INT)); 99 PetscCall(ISGeneralSetIndices(is, n, idx, PETSC_OWN_POINTER)); 100 PetscFunctionReturn(PETSC_SUCCESS); 101 } 102 103 PetscErrorCode ISLoad_Default(IS is, PetscViewer viewer) 104 { 105 PetscBool isbinary, ishdf5; 106 107 PetscFunctionBegin; 108 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERBINARY, &isbinary)); 109 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5, &ishdf5)); 110 if (isbinary) { 111 PetscCall(ISLoad_Binary(is, viewer)); 112 } else if (ishdf5) { 113 #if defined(PETSC_HAVE_HDF5) 114 PetscCall(ISLoad_HDF5(is, viewer)); 115 #endif 116 } 117 PetscFunctionReturn(PETSC_SUCCESS); 118 } 119