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 PetscCall(PetscInfo(is, "Read IS object with name %s of size %" PetscInt_FMT ":%" PetscInt_FMT "\n", isname, is->map->n, is->map->N)); 56 PetscFunctionReturn(PETSC_SUCCESS); 57 } 58 #endif 59 60 static PetscErrorCode ISLoad_Binary(IS is, PetscViewer viewer) 61 { 62 PetscBool isgeneral, skipHeader; 63 PetscInt tr[2], rows, N, n, s, *idx; 64 PetscLayout map; 65 66 PetscFunctionBegin; 67 PetscCall(PetscObjectTypeCompare((PetscObject)is, ISGENERAL, &isgeneral)); 68 PetscCheck(isgeneral, PetscObjectComm((PetscObject)is), PETSC_ERR_ARG_INCOMP, "IS must be of type ISGENERAL to load into it"); 69 PetscCall(PetscViewerSetUp(viewer)); 70 PetscCall(PetscViewerBinaryGetSkipHeader(viewer, &skipHeader)); 71 72 PetscCall(ISGetLayout(is, &map)); 73 PetscCall(PetscLayoutGetSize(map, &N)); 74 75 /* read IS header */ 76 if (!skipHeader) { 77 PetscCall(PetscViewerBinaryRead(viewer, tr, 2, NULL, PETSC_INT)); 78 PetscCheck(tr[0] == IS_FILE_CLASSID, PetscObjectComm((PetscObject)viewer), PETSC_ERR_FILE_UNEXPECTED, "Not an IS next in file"); 79 PetscCheck(tr[1] >= 0, PetscObjectComm((PetscObject)viewer), PETSC_ERR_FILE_UNEXPECTED, "IS size (%" PetscInt_FMT ") in file is negative", tr[1]); 80 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); 81 rows = tr[1]; 82 } else { 83 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"); 84 rows = N; 85 } 86 87 /* set IS size if not already set */ 88 if (N < 0) PetscCall(PetscLayoutSetSize(map, rows)); 89 PetscCall(PetscLayoutSetUp(map)); 90 91 /* get IS sizes and check global size */ 92 PetscCall(PetscLayoutGetSize(map, &N)); 93 PetscCall(PetscLayoutGetLocalSize(map, &n)); 94 PetscCall(PetscLayoutGetRange(map, &s, NULL)); 95 PetscCheck(N == rows, PETSC_COMM_SELF, PETSC_ERR_FILE_UNEXPECTED, "IS in file different size (%" PetscInt_FMT ") than input IS (%" PetscInt_FMT ")", rows, N); 96 97 /* read IS indices */ 98 PetscCall(PetscMalloc1(n, &idx)); 99 PetscCall(PetscViewerBinaryReadAll(viewer, idx, n, s, N, PETSC_INT)); 100 PetscCall(ISGeneralSetIndices(is, n, idx, PETSC_OWN_POINTER)); 101 PetscFunctionReturn(PETSC_SUCCESS); 102 } 103 104 PetscErrorCode ISLoad_Default(IS is, PetscViewer viewer) 105 { 106 PetscBool isbinary, ishdf5; 107 108 PetscFunctionBegin; 109 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERBINARY, &isbinary)); 110 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERHDF5, &ishdf5)); 111 if (isbinary) { 112 PetscCall(ISLoad_Binary(is, viewer)); 113 } else if (ishdf5) { 114 #if defined(PETSC_HAVE_HDF5) 115 PetscCall(ISLoad_HDF5(is, viewer)); 116 #endif 117 } 118 PetscFunctionReturn(PETSC_SUCCESS); 119 } 120