1 #include <../src/vec/pf/pfimpl.h> /*I "petscpf.h" I*/ 2 3 static PetscErrorCode PFApply_Constant(void *value, PetscInt n, const PetscScalar *x, PetscScalar *y) 4 { 5 PetscInt i; 6 PetscScalar v = ((PetscScalar *)value)[0]; 7 8 PetscFunctionBegin; 9 n *= (PetscInt)PetscRealPart(((PetscScalar *)value)[1]); 10 for (i = 0; i < n; i++) y[i] = v; 11 PetscFunctionReturn(PETSC_SUCCESS); 12 } 13 14 static PetscErrorCode PFApplyVec_Constant(void *value, Vec x, Vec y) 15 { 16 PetscFunctionBegin; 17 PetscCall(VecSet(y, *((PetscScalar *)value))); 18 PetscFunctionReturn(PETSC_SUCCESS); 19 } 20 21 static PetscErrorCode PFView_Constant(void *value, PetscViewer viewer) 22 { 23 PetscBool iascii; 24 25 PetscFunctionBegin; 26 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &iascii)); 27 if (iascii) { 28 #if !defined(PETSC_USE_COMPLEX) 29 PetscCall(PetscViewerASCIIPrintf(viewer, "Constant = %g\n", *(double *)value)); 30 #else 31 PetscCall(PetscViewerASCIIPrintf(viewer, "Constant = %g + %gi\n", (double)PetscRealPart(*(PetscScalar *)value), (double)PetscImaginaryPart(*(PetscScalar *)value))); 32 #endif 33 } 34 PetscFunctionReturn(PETSC_SUCCESS); 35 } 36 37 static PetscErrorCode PFDestroy_Constant(void *value) 38 { 39 PetscFunctionBegin; 40 PetscCall(PetscFree(value)); 41 PetscFunctionReturn(PETSC_SUCCESS); 42 } 43 44 static PetscErrorCode PFSetFromOptions_Constant(PF pf, PetscOptionItems PetscOptionsObject) 45 { 46 PetscScalar *value = (PetscScalar *)pf->data; 47 48 PetscFunctionBegin; 49 PetscOptionsHeadBegin(PetscOptionsObject, "Constant function options"); 50 PetscCall(PetscOptionsScalar("-pf_constant", "The constant value", "None", *value, value, NULL)); 51 PetscOptionsHeadEnd(); 52 PetscFunctionReturn(PETSC_SUCCESS); 53 } 54 55 PETSC_INTERN PetscErrorCode PFCreate_Constant(PF pf, void *value) 56 { 57 PetscScalar *loc; 58 59 PetscFunctionBegin; 60 PetscCall(PetscMalloc1(2, &loc)); 61 if (value) loc[0] = *(PetscScalar *)value; 62 else loc[0] = 0.0; 63 loc[1] = pf->dimout; 64 PetscCall(PFSet(pf, PFApply_Constant, PFApplyVec_Constant, PFView_Constant, PFDestroy_Constant, loc)); 65 66 pf->ops->setfromoptions = PFSetFromOptions_Constant; 67 PetscFunctionReturn(PETSC_SUCCESS); 68 } 69 70 /*typedef PetscErrorCode (*FCN)(void*,PetscInt,const PetscScalar*,PetscScalar*); force argument to next function to not be extern C*/ 71 72 PETSC_INTERN PetscErrorCode PFCreate_Quick(PF pf, PetscErrorCode (*function)(void *, PetscInt, const PetscScalar *, PetscScalar *)) 73 { 74 PetscFunctionBegin; 75 PetscCall(PFSet(pf, function, NULL, NULL, NULL, NULL)); 76 PetscFunctionReturn(PETSC_SUCCESS); 77 } 78 79 /* -------------------------------------------------------------------------------------------------------------------*/ 80 static PetscErrorCode PFApply_Identity(void *value, PetscInt n, const PetscScalar *x, PetscScalar *y) 81 { 82 PetscInt i; 83 84 PetscFunctionBegin; 85 n *= *(PetscInt *)value; 86 for (i = 0; i < n; i++) y[i] = x[i]; 87 PetscFunctionReturn(PETSC_SUCCESS); 88 } 89 90 static PetscErrorCode PFApplyVec_Identity(void *value, Vec x, Vec y) 91 { 92 PetscFunctionBegin; 93 (void)value; 94 PetscCall(VecCopy(x, y)); 95 PetscFunctionReturn(PETSC_SUCCESS); 96 } 97 98 static PetscErrorCode PFView_Identity(void *value, PetscViewer viewer) 99 { 100 PetscBool iascii; 101 102 PetscFunctionBegin; 103 (void)value; 104 PetscCall(PetscObjectTypeCompare((PetscObject)viewer, PETSCVIEWERASCII, &iascii)); 105 if (iascii) PetscCall(PetscViewerASCIIPrintf(viewer, "Identity function\n")); 106 PetscFunctionReturn(PETSC_SUCCESS); 107 } 108 109 static PetscErrorCode PFDestroy_Identity(void *value) 110 { 111 PetscFunctionBegin; 112 PetscCall(PetscFree(value)); 113 PetscFunctionReturn(PETSC_SUCCESS); 114 } 115 116 PETSC_INTERN PetscErrorCode PFCreate_Identity(PF pf, void *value) 117 { 118 PetscInt *loc; 119 120 PetscFunctionBegin; 121 (void)value; 122 PetscCheck(pf->dimout == pf->dimin, PETSC_COMM_SELF, PETSC_ERR_ARG_SIZ, "Input dimension must match output dimension for Identity function, dimin = %" PetscInt_FMT " dimout = %" PetscInt_FMT, pf->dimin, pf->dimout); 123 PetscCall(PetscNew(&loc)); 124 loc[0] = pf->dimout; 125 PetscCall(PFSet(pf, PFApply_Identity, PFApplyVec_Identity, PFView_Identity, PFDestroy_Identity, loc)); 126 PetscFunctionReturn(PETSC_SUCCESS); 127 } 128