Actual source code: vsection.c

petsc-3.4.4 2014-03-13
  1: /*
  2:    This file contains routines for section object operations on Vecs
  3: */
  4: #include <petsc-private/isimpl.h>   /*I  "petscvec.h"   I*/
  5: #include <petsc-private/vecimpl.h>   /*I  "petscvec.h"   I*/

  9: PetscErrorCode PetscSectionVecView_ASCII(PetscSection s, Vec v, PetscViewer viewer)
 10: {
 11:   PetscScalar    *array;
 12:   PetscInt       p, i;
 13:   PetscMPIInt    rank;

 17:   if (s->atlasLayout.numDof != 1) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_SUP, "Cannot handle %d dof in a uniform section", s->atlasLayout.numDof);
 18:   MPI_Comm_rank(PetscObjectComm((PetscObject)viewer), &rank);
 19:   VecGetArray(v, &array);
 20:   PetscViewerASCIISynchronizedAllow(viewer, PETSC_TRUE);
 21:   PetscViewerASCIISynchronizedPrintf(viewer, "Process %d:\n", rank);
 22:   for (p = 0; p < s->atlasLayout.pEnd - s->atlasLayout.pStart; ++p) {
 23:     if ((s->bc) && (s->bc->atlasDof[p] > 0)) {
 24:       PetscInt b;

 26:       PetscViewerASCIISynchronizedPrintf(viewer, "  (%4d) dim %2d offset %3d", p+s->atlasLayout.pStart, s->atlasDof[p], s->atlasOff[p]);
 27:       for (i = s->atlasOff[p]; i < s->atlasOff[p]+s->atlasDof[p]; ++i) {
 28:         PetscScalar v = array[i];
 29: #if defined(PETSC_USE_COMPLEX)
 30:         if (PetscImaginaryPart(v) > 0.0) {
 31:           PetscViewerASCIISynchronizedPrintf(viewer," %G + %G i", PetscRealPart(v), PetscImaginaryPart(v));
 32:         } else if (PetscImaginaryPart(v) < 0.0) {
 33:           PetscViewerASCIISynchronizedPrintf(viewer," %G - %G i", PetscRealPart(v),-PetscImaginaryPart(v));
 34:         } else {
 35:           PetscViewerASCIISynchronizedPrintf(viewer, " %G", PetscRealPart(v));
 36:         }
 37: #else
 38:         PetscViewerASCIISynchronizedPrintf(viewer, " %G", v);
 39: #endif
 40:       }
 41:       PetscViewerASCIISynchronizedPrintf(viewer, " constrained");
 42:       for (b = 0; b < s->bc->atlasDof[p]; ++b) {
 43:         PetscViewerASCIISynchronizedPrintf(viewer, " %d", s->bcIndices[s->bc->atlasOff[p]+b]);
 44:       }
 45:       PetscViewerASCIISynchronizedPrintf(viewer, "\n");
 46:     } else {
 47:       PetscViewerASCIISynchronizedPrintf(viewer, "  (%4d) dim %2d offset %3d", p+s->atlasLayout.pStart, s->atlasDof[p], s->atlasOff[p]);
 48:       for (i = s->atlasOff[p]; i < s->atlasOff[p]+s->atlasDof[p]; ++i) {
 49:         PetscScalar v = array[i];
 50: #if defined(PETSC_USE_COMPLEX)
 51:         if (PetscImaginaryPart(v) > 0.0) {
 52:           PetscViewerASCIISynchronizedPrintf(viewer," %G + %G i", PetscRealPart(v), PetscImaginaryPart(v));
 53:         } else if (PetscImaginaryPart(v) < 0.0) {
 54:           PetscViewerASCIISynchronizedPrintf(viewer," %G - %G i", PetscRealPart(v),-PetscImaginaryPart(v));
 55:         } else {
 56:           PetscViewerASCIISynchronizedPrintf(viewer, " %G", PetscRealPart(v));
 57:         }
 58: #else
 59:         PetscViewerASCIISynchronizedPrintf(viewer, " %G", v);
 60: #endif
 61:       }
 62:       PetscViewerASCIISynchronizedPrintf(viewer, "\n");
 63:     }
 64:   }
 65:   PetscViewerFlush(viewer);
 66:   VecRestoreArray(v, &array);
 67:   return(0);
 68: }

 72: PetscErrorCode PetscSectionVecView(PetscSection s, Vec v, PetscViewer viewer)
 73: {
 74:   PetscBool      isascii;
 75:   PetscInt       f;

 79:   if (!viewer) {PetscViewerASCIIGetStdout(PetscObjectComm((PetscObject)v), &viewer);}
 82:   PetscObjectTypeCompare((PetscObject) viewer, PETSCVIEWERASCII, &isascii);
 83:   if (isascii) {
 84:     const char *name;

 86:     PetscObjectGetName((PetscObject) v, &name);
 87:     if (s->numFields) {
 88:       PetscViewerASCIIPrintf(viewer, "%s with %d fields\n", name, s->numFields);
 89:       for (f = 0; f < s->numFields; ++f) {
 90:         PetscViewerASCIIPrintf(viewer, "  field %d with %d components\n", f, s->numFieldComponents[f]);
 91:         PetscSectionVecView_ASCII(s->field[f], v, viewer);
 92:       }
 93:     } else {
 94:       PetscViewerASCIIPrintf(viewer, "%s\n", name);
 95:       PetscSectionVecView_ASCII(s, v, viewer);
 96:     }
 97:   }
 98:   return(0);
 99: }

103: PetscErrorCode VecGetValuesSection(Vec v, PetscSection s, PetscInt point, PetscScalar **values)
104: {
105:   PetscScalar    *baseArray;
106:   const PetscInt p = point - s->atlasLayout.pStart;

110:   VecGetArray(v, &baseArray);
111:   *values = &baseArray[s->atlasOff[p]];
112:   VecRestoreArray(v, &baseArray);
113:   return(0);
114: }

118: /*@C
119:   VecSetValuesSection - Sets all the values associated with a given point, accoridng to the section, in the given Vec

121:   Not collective

123:   Input Parameters:
124: + v - the Vec
125: . s - the organizing PetscSection
126: . point - the point
127: . values - the array of input values
128: - mode - the insertion mode, either ADD_VALUES or INSERT_VALUES

130:   Level: developer

132:   Note: This is similar to MatSetValuesStencil()

134: .seealso: PetscSection, PetscSectionCreate()
135: @*/
136: PetscErrorCode VecSetValuesSection(Vec v, PetscSection s, PetscInt point, PetscScalar values[], InsertMode mode)
137: {
138:   PetscScalar     *baseArray, *array;
139:   const PetscBool doInsert    = mode == INSERT_VALUES     || mode == INSERT_ALL_VALUES || mode == INSERT_BC_VALUES                          ? PETSC_TRUE : PETSC_FALSE;
140:   const PetscBool doInterior  = mode == INSERT_ALL_VALUES || mode == ADD_ALL_VALUES    || mode == INSERT_VALUES    || mode == ADD_VALUES    ? PETSC_TRUE : PETSC_FALSE;
141:   const PetscBool doBC        = mode == INSERT_ALL_VALUES || mode == ADD_ALL_VALUES    || mode == INSERT_BC_VALUES || mode == ADD_BC_VALUES ? PETSC_TRUE : PETSC_FALSE;
142:   const PetscInt  p           = point - s->atlasLayout.pStart;
143:   const PetscInt  orientation = 0; /* Needs to be included for use in closure operations */
144:   PetscInt        cDim        = 0;
145:   PetscErrorCode  ierr;

148:   PetscSectionGetConstraintDof(s, p, &cDim);
149:   VecGetArray(v, &baseArray);
150:   array = &baseArray[s->atlasOff[p]];
151:   if (!cDim && doInterior) {
152:     if (orientation >= 0) {
153:       const PetscInt dim = s->atlasDof[p];
154:       PetscInt       i;

156:       if (doInsert) {
157:         for (i = 0; i < dim; ++i) array[i] = values[i];
158:       } else {
159:         for (i = 0; i < dim; ++i) array[i] += values[i];
160:       }
161:     } else {
162:       PetscInt offset = 0;
163:       PetscInt j      = -1, field, i;

165:       for (field = 0; field < s->numFields; ++field) {
166:         const PetscInt dim = s->field[field]->atlasDof[p]; /* PetscSectionGetFieldDof() */

168:         for (i = dim-1; i >= 0; --i) array[++j] = values[i+offset];
169:         offset += dim;
170:       }
171:     }
172:   } else if (cDim) {
173:     if (orientation >= 0) {
174:       const PetscInt dim  = s->atlasDof[p];
175:       PetscInt       cInd = 0, i;
176:       const PetscInt *cDof;

178:       PetscSectionGetConstraintIndices(s, point, &cDof);
179:       if (doInsert) {
180:         for (i = 0; i < dim; ++i) {
181:           if ((cInd < cDim) && (i == cDof[cInd])) {
182:             if (doBC) array[i] = values[i]; /* Constrained update */
183:             ++cInd;
184:             continue;
185:           }
186:           if (doInterior) array[i] = values[i]; /* Unconstrained update */
187:         }
188:       } else {
189:         for (i = 0; i < dim; ++i) {
190:           if ((cInd < cDim) && (i == cDof[cInd])) {
191:             if (doBC) array[i] += values[i]; /* Constrained update */
192:             ++cInd;
193:             continue;
194:           }
195:           if (doInterior) array[i] += values[i]; /* Unconstrained update */
196:         }
197:       }
198:     } else {
199:       /* TODO This is broken for add and constrained update */
200:       const PetscInt *cDof;
201:       PetscInt       offset  = 0;
202:       PetscInt       cOffset = 0;
203:       PetscInt       j       = 0, field;

205:       PetscSectionGetConstraintIndices(s, point, &cDof);
206:       for (field = 0; field < s->numFields; ++field) {
207:         const PetscInt dim  = s->field[field]->atlasDof[p];     /* PetscSectionGetFieldDof() */
208:         const PetscInt tDim = s->field[field]->bc->atlasDof[p]; /* PetscSectionGetFieldConstraintDof() */
209:         const PetscInt sDim = dim - tDim;
210:         PetscInt       cInd = 0, i ,k;

212:         for (i = 0, k = dim+offset-1; i < dim; ++i, ++j, --k) {
213:           if ((cInd < sDim) && (j == cDof[cInd+cOffset])) {++cInd; continue;}
214:           if (doInterior) array[j] = values[k];   /* Unconstrained update */
215:         }
216:         offset  += dim;
217:         cOffset += dim - tDim;
218:       }
219:     }
220:   }
221:   VecRestoreArray(v, &baseArray);
222:   return(0);
223: }