Actual source code: petscviewer.h

petsc-3.4.4 2014-03-13
  1: /*
  2:      PetscViewers are objects where other objects can be looked at or stored.
  3: */


  8: #include <petscsys.h>
  9: #include <petscviewertypes.h>

 11: PETSC_EXTERN PetscClassId PETSC_VIEWER_CLASSID;

 13: /*J
 14:     PetscViewerType - String with the name of a PETSc PETScViewer

 16:    Level: beginner

 18: .seealso: PetscViewerSetType(), PetscViewer, PetscViewerRegister(), PetscViewerCreate()
 19: J*/
 20: typedef const char* PetscViewerType;
 21: #define PETSCVIEWERSOCKET       "socket"
 22: #define PETSCVIEWERASCII        "ascii"
 23: #define PETSCVIEWERBINARY       "binary"
 24: #define PETSCVIEWERSTRING       "string"
 25: #define PETSCVIEWERDRAW         "draw"
 26: #define PETSCVIEWERVU           "vu"
 27: #define PETSCVIEWERMATHEMATICA  "mathematica"
 28: #define PETSCVIEWERNETCDF       "netcdf"
 29: #define PETSCVIEWERHDF5         "hdf5"
 30: #define PETSCVIEWERVTK          "vtk"
 31: #define PETSCVIEWERMATLAB       "matlab"
 32: #define PETSCVIEWERAMS          "ams"

 34: PETSC_EXTERN PetscFunctionList PetscViewerList;
 35: PETSC_EXTERN PetscErrorCode PetscViewerRegisterAll(void);
 36: PETSC_EXTERN PetscErrorCode PetscViewerInitializePackage(void);

 38: PETSC_EXTERN PetscErrorCode PetscViewerRegister(const char[],PetscErrorCode (*)(PetscViewer));

 40: PETSC_EXTERN PetscErrorCode PetscViewerCreate(MPI_Comm,PetscViewer*);
 41: PETSC_EXTERN PetscErrorCode PetscViewerSetFromOptions(PetscViewer);
 42: PETSC_EXTERN PetscErrorCode PetscViewerASCIIOpenWithFILE(MPI_Comm,FILE*,PetscViewer*);

 44: PETSC_EXTERN PetscErrorCode PetscViewerASCIIOpen(MPI_Comm,const char[],PetscViewer*);
 45: PETSC_EXTERN PetscErrorCode PetscViewerASCIISetFILE(PetscViewer,FILE*);
 46: PETSC_EXTERN PetscErrorCode PetscViewerBinaryOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);
 47: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetFlowControl(PetscViewer,PetscInt*);
 48: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetFlowControl(PetscViewer,PetscInt);
 49: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetMPIIO(PetscViewer);
 50: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetMPIIO(PetscViewer,PetscBool *);
 51: #if defined(PETSC_HAVE_MPIIO)
 52: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetMPIIODescriptor(PetscViewer,MPI_File*);
 53: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetMPIIOOffset(PetscViewer,MPI_Offset*);
 54: PETSC_EXTERN PetscErrorCode PetscViewerBinaryAddMPIIOOffset(PetscViewer,MPI_Offset);
 55: #endif

 57: PETSC_EXTERN PetscErrorCode PetscViewerSocketOpen(MPI_Comm,const char[],int,PetscViewer*);
 58: PETSC_EXTERN PetscErrorCode PetscViewerStringOpen(MPI_Comm,char[],PetscInt,PetscViewer*);
 59: PETSC_EXTERN PetscErrorCode PetscViewerDrawOpen(MPI_Comm,const char[],const char[],int,int,int,int,PetscViewer*);
 60: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaOpen(MPI_Comm, int, const char[], const char[], PetscViewer *);
 61: PETSC_EXTERN PetscErrorCode PetscViewerSiloOpen(MPI_Comm, const char[], PetscViewer *);
 62: PETSC_EXTERN PetscErrorCode PetscViewerMatlabOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);

 64: PETSC_EXTERN PetscErrorCode PetscViewerGetType(PetscViewer,PetscViewerType*);
 65: PETSC_EXTERN PetscErrorCode PetscViewerSetType(PetscViewer,PetscViewerType);
 66: PETSC_EXTERN PetscErrorCode PetscViewerDestroy(PetscViewer*);
 67: PETSC_EXTERN PetscErrorCode PetscViewerGetSingleton(PetscViewer,PetscViewer*);
 68: PETSC_EXTERN PetscErrorCode PetscViewerRestoreSingleton(PetscViewer,PetscViewer*);
 69: PETSC_EXTERN PetscErrorCode PetscViewerGetSubcomm(PetscViewer,MPI_Comm,PetscViewer*);
 70: PETSC_EXTERN PetscErrorCode PetscViewerRestoreSubcomm(PetscViewer,MPI_Comm,PetscViewer*);

 72: PETSC_EXTERN PetscErrorCode PetscViewerSetUp(PetscViewer);
 73: PETSC_EXTERN PetscErrorCode PetscViewerView(PetscViewer,PetscViewer);

 75: PETSC_EXTERN PetscErrorCode PetscViewerSetOptionsPrefix(PetscViewer,const char[]);
 76: PETSC_EXTERN PetscErrorCode PetscViewerAppendOptionsPrefix(PetscViewer,const char[]);
 77: PETSC_EXTERN PetscErrorCode PetscViewerGetOptionsPrefix(PetscViewer,const char*[]);

 79: /*E
 80:     PetscViewerFormat - Way a viewer presents the object

 82:    Level: beginner

 84:    The values below are also listed in finclude/petscviewer.h. If another values is added below it
 85:    must also be added there.

 87: .seealso: PetscViewerSetFormat(), PetscViewer, PetscViewerType, PetscViewerPushFormat(), PetscViewerPopFormat()
 88: E*/
 89: typedef enum {
 90:   PETSC_VIEWER_DEFAULT,
 91:   PETSC_VIEWER_ASCII_MATLAB,
 92:   PETSC_VIEWER_ASCII_MATHEMATICA,
 93:   PETSC_VIEWER_ASCII_IMPL,
 94:   PETSC_VIEWER_ASCII_INFO,
 95:   PETSC_VIEWER_ASCII_INFO_DETAIL,
 96:   PETSC_VIEWER_ASCII_COMMON,
 97:   PETSC_VIEWER_ASCII_SYMMODU,
 98:   PETSC_VIEWER_ASCII_INDEX,
 99:   PETSC_VIEWER_ASCII_DENSE,
100:   PETSC_VIEWER_ASCII_MATRIXMARKET,
101:   PETSC_VIEWER_ASCII_VTK,
102:   PETSC_VIEWER_ASCII_VTK_CELL,
103:   PETSC_VIEWER_ASCII_VTK_COORDS,
104:   PETSC_VIEWER_ASCII_PCICE,
105:   PETSC_VIEWER_ASCII_PYTHON,
106:   PETSC_VIEWER_ASCII_FACTOR_INFO,
107:   PETSC_VIEWER_ASCII_LATEX,
108:   PETSC_VIEWER_DRAW_BASIC,
109:   PETSC_VIEWER_DRAW_LG,
110:   PETSC_VIEWER_DRAW_CONTOUR,
111:   PETSC_VIEWER_DRAW_PORTS,
112:   PETSC_VIEWER_VTK_VTS,
113:   PETSC_VIEWER_VTK_VTU,
114:   PETSC_VIEWER_BINARY_MATLAB,
115:   PETSC_VIEWER_NATIVE,
116:   PETSC_VIEWER_NOFORMAT
117:   } PetscViewerFormat;
118: PETSC_EXTERN const char *const PetscViewerFormats[];

120: PETSC_EXTERN PetscErrorCode PetscViewerSetFormat(PetscViewer,PetscViewerFormat);
121: PETSC_EXTERN PetscErrorCode PetscViewerPushFormat(PetscViewer,PetscViewerFormat);
122: PETSC_EXTERN PetscErrorCode PetscViewerPopFormat(PetscViewer);
123: PETSC_EXTERN PetscErrorCode PetscViewerGetFormat(PetscViewer,PetscViewerFormat*);
124: PETSC_EXTERN PetscErrorCode PetscViewerFlush(PetscViewer);

126: PETSC_EXTERN PetscErrorCode PetscOptionsGetViewer(MPI_Comm,const char[],const char[],PetscViewer*,PetscViewerFormat*,PetscBool*);
127: PETSC_EXTERN PetscErrorCode PetscOptionsViewer(const char[],const char[],const char[],PetscViewer*,PetscViewerFormat *,PetscBool *);

129: /*
130:    Operations explicit to a particular class of viewers
131: */

133: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetPointer(PetscViewer,FILE**);
134: PETSC_EXTERN PetscErrorCode PetscViewerFileGetMode(PetscViewer,PetscFileMode*);
135: PETSC_EXTERN PetscErrorCode PetscViewerFileSetMode(PetscViewer,PetscFileMode);
136: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPrintf(PetscViewer,const char[],...);
137: PETSC_EXTERN PetscErrorCode PetscViewerASCIISynchronizedPrintf(PetscViewer,const char[],...);
138: PETSC_EXTERN PetscErrorCode PetscViewerASCIISynchronizedAllow(PetscViewer,PetscBool);
139: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPushTab(PetscViewer);
140: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPopTab(PetscViewer);
141: PETSC_EXTERN PetscErrorCode PetscViewerASCIIUseTabs(PetscViewer,PetscBool );
142: PETSC_EXTERN PetscErrorCode PetscViewerASCIISetTab(PetscViewer,PetscInt);
143: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetTab(PetscViewer,PetscInt*);
144: PETSC_EXTERN PetscErrorCode PetscViewerASCIIAddTab(PetscViewer,PetscInt);
145: PETSC_EXTERN PetscErrorCode PetscViewerASCIISubtractTab(PetscViewer,PetscInt);
146: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetDescriptor(PetscViewer,int*);
147: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetInfoPointer(PetscViewer,FILE **);
148: PETSC_EXTERN PetscErrorCode PetscViewerBinaryRead(PetscViewer,void*,PetscInt,PetscDataType);
149: PETSC_EXTERN PetscErrorCode PetscViewerBinaryWrite(PetscViewer,void*,PetscInt,PetscDataType,PetscBool );
150: PETSC_EXTERN PetscErrorCode PetscViewerStringSPrintf(PetscViewer,const char[],...);
151: PETSC_EXTERN PetscErrorCode PetscViewerStringSetString(PetscViewer,char[],PetscInt);
152: PETSC_EXTERN PetscErrorCode PetscViewerDrawClear(PetscViewer);
153: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetHold(PetscViewer,PetscBool);
154: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetHold(PetscViewer,PetscBool*);
155: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetPause(PetscViewer,PetscReal);
156: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetPause(PetscViewer,PetscReal*);
157: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetInfo(PetscViewer,const char[],const char[],int,int,int,int);
158: PETSC_EXTERN PetscErrorCode PetscViewerDrawResize(PetscViewer,int,int);
159: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetBounds(PetscViewer,PetscInt,const PetscReal*);
160: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetBounds(PetscViewer,PetscInt*,const PetscReal**);
161: PETSC_EXTERN PetscErrorCode PetscViewerSocketSetConnection(PetscViewer,const char[],int);
162: PETSC_EXTERN PetscErrorCode PetscViewerBinarySkipInfo(PetscViewer);
163: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipOptions(PetscViewer,PetscBool );
164: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipOptions(PetscViewer,PetscBool *);
165: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipHeader(PetscViewer,PetscBool);
166: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipHeader(PetscViewer,PetscBool*);
167: PETSC_EXTERN PetscErrorCode PetscViewerBinaryReadStringArray(PetscViewer,char***);
168: PETSC_EXTERN PetscErrorCode PetscViewerBinaryWriteStringArray(PetscViewer,char**);

170: PETSC_EXTERN PetscErrorCode PetscViewerFileSetName(PetscViewer,const char[]);
171: PETSC_EXTERN PetscErrorCode PetscViewerFileGetName(PetscViewer,const char**);

173: PETSC_EXTERN PetscErrorCode PetscViewerVUGetPointer(PetscViewer, FILE**);
174: PETSC_EXTERN PetscErrorCode PetscViewerVUSetVecSeen(PetscViewer, PetscBool );
175: PETSC_EXTERN PetscErrorCode PetscViewerVUGetVecSeen(PetscViewer, PetscBool  *);
176: PETSC_EXTERN PetscErrorCode PetscViewerVUPrintDeferred(PetscViewer, const char [], ...);
177: PETSC_EXTERN PetscErrorCode PetscViewerVUFlushDeferred(PetscViewer);

179: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaInitializePackage(void);
180: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaFinalizePackage(void);
181: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaGetName(PetscViewer, const char **);
182: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSetName(PetscViewer, const char []);
183: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaClearName(PetscViewer);
184: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSkipPackets(PetscViewer, int);

186: PETSC_EXTERN PetscErrorCode PetscViewerSiloGetName(PetscViewer, char **);
187: PETSC_EXTERN PetscErrorCode PetscViewerSiloSetName(PetscViewer, const char []);
188: PETSC_EXTERN PetscErrorCode PetscViewerSiloClearName(PetscViewer);
189: PETSC_EXTERN PetscErrorCode PetscViewerSiloGetMeshName(PetscViewer, char **);
190: PETSC_EXTERN PetscErrorCode PetscViewerSiloSetMeshName(PetscViewer, const char []);
191: PETSC_EXTERN PetscErrorCode PetscViewerSiloClearMeshName(PetscViewer);

193: PETSC_EXTERN PetscErrorCode PetscViewerNetcdfOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);
194: PETSC_EXTERN PetscErrorCode PetscViewerNetcdfGetID(PetscViewer, int *);

196: typedef enum {PETSC_VTK_POINT_FIELD, PETSC_VTK_POINT_VECTOR_FIELD, PETSC_VTK_CELL_FIELD, PETSC_VTK_CELL_VECTOR_FIELD} PetscViewerVTKFieldType;
197: PETSC_EXTERN PetscErrorCode PetscViewerVTKAddField(PetscViewer,PetscObject,PetscErrorCode (*PetscViewerVTKWriteFunction)(PetscObject,PetscViewer),PetscViewerVTKFieldType,PetscObject);
198: PETSC_EXTERN PetscErrorCode PetscViewerVTKOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);

200: /*
201:      These are all the default viewers that do not have to be explicitly opened
202: */
203: PETSC_EXTERN PetscViewer    PETSC_VIEWER_STDOUT_(MPI_Comm);
204: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStdout(MPI_Comm,PetscViewer*);
205: PETSC_EXTERN PetscViewer    PETSC_VIEWER_STDERR_(MPI_Comm);
206: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStderr(MPI_Comm,PetscViewer*);
207: PETSC_EXTERN PetscViewer    PETSC_VIEWER_DRAW_(MPI_Comm);
208: PETSC_EXTERN PetscViewer    PETSC_VIEWER_SOCKET_(MPI_Comm);
209: PETSC_EXTERN PetscViewer    PETSC_VIEWER_BINARY_(MPI_Comm);
210: PETSC_EXTERN PetscViewer    PETSC_VIEWER_MATLAB_(MPI_Comm);
211: PETSC_EXTERN PetscViewer   PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE;

213: #define PETSC_VIEWER_STDERR_SELF  PETSC_VIEWER_STDERR_(PETSC_COMM_SELF)
214: #define PETSC_VIEWER_STDERR_WORLD PETSC_VIEWER_STDERR_(PETSC_COMM_WORLD)

216: /*MC
217:   PETSC_VIEWER_STDOUT_WORLD  - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD)

219:   Level: beginner
220: M*/
221: #define PETSC_VIEWER_STDOUT_WORLD PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD)

223: /*MC
224:   PETSC_VIEWER_STDOUT_SELF  - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF)

226:   Level: beginner
227: M*/
228: #define PETSC_VIEWER_STDOUT_SELF  PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF)

230: /*MC
231:   PETSC_VIEWER_DRAW_WORLD  - same as PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD)

233:   Level: intermediate
234: M*/
235: #define PETSC_VIEWER_DRAW_WORLD   PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD)

237: /*MC
238:   PETSC_VIEWER_DRAW_SELF  - same as PETSC_VIEWER_DRAW_(PETSC_COMM_SELF)

240:   Level: intermediate
241: M*/
242: #define PETSC_VIEWER_DRAW_SELF    PETSC_VIEWER_DRAW_(PETSC_COMM_SELF)

244: /*MC
245:   PETSC_VIEWER_SOCKET_WORLD  - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD)

247:   Level: intermediate
248: M*/
249: #define PETSC_VIEWER_SOCKET_WORLD PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD)

251: /*MC
252:   PETSC_VIEWER_SOCKET_SELF  - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF)

254:   Level: intermediate
255: M*/
256: #define PETSC_VIEWER_SOCKET_SELF  PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF)

258: /*MC
259:   PETSC_VIEWER_BINARY_WORLD  - same as PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD)

261:   Level: intermediate
262: M*/
263: #define PETSC_VIEWER_BINARY_WORLD PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD)

265: /*MC
266:   PETSC_VIEWER_BINARY_SELF  - same as PETSC_VIEWER_BINARY_(PETSC_COMM_SELF)

268:   Level: intermediate
269: M*/
270: #define PETSC_VIEWER_BINARY_SELF  PETSC_VIEWER_BINARY_(PETSC_COMM_SELF)

272: /*MC
273:   PETSC_VIEWER_MATLAB_WORLD  - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD)

275:   Level: intermediate
276: M*/
277: #define PETSC_VIEWER_MATLAB_WORLD PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD)

279: /*MC
280:   PETSC_VIEWER_MATLAB_SELF  - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF)

282:   Level: intermediate
283: M*/
284: #define PETSC_VIEWER_MATLAB_SELF  PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF)

286: #define PETSC_VIEWER_MATHEMATICA_WORLD (PetscViewerInitializeMathematicaWorld_Private(),PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE)

290: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStart(PetscViewer viewer,PetscInt *mcnt,PetscInt *cnt)
291: {
294:   PetscViewerBinaryGetFlowControl(viewer,mcnt);
295:   PetscViewerBinaryGetFlowControl(viewer,cnt);
296:   return(0);
297: }

301: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStepMaster(PetscViewer viewer,PetscInt i,PetscInt *mcnt,PetscInt cnt)
302: {
304:   MPI_Comm       comm;

307:   PetscObjectGetComm((PetscObject)viewer,&comm);
308:   if (i >= *mcnt) {
309:     *mcnt += cnt;
310:     MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
311:   }
312:   return(0);
313: }

317: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlEndMaster(PetscViewer viewer,PetscInt *mcnt)
318: {
320:   MPI_Comm       comm;
322:   PetscObjectGetComm((PetscObject)viewer,&comm);
323:   *mcnt = 0;
324:   MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
325:   return(0);
326: }

330: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStepWorker(PetscViewer viewer,PetscMPIInt rank,PetscInt *mcnt)
331: {
333:   MPI_Comm       comm;
335:   PetscObjectGetComm((PetscObject)viewer,&comm);
336:   while (PETSC_TRUE) {
337:     if (rank < *mcnt) break;
338:     MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
339:   }
340:   return(0);
341: }

345: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlEndWorker(PetscViewer viewer,PetscInt *mcnt)
346: {
348:   MPI_Comm       comm;
350:   PetscObjectGetComm((PetscObject)viewer,&comm);
351:   while (PETSC_TRUE) {
352:     MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
353:     if (!*mcnt) break;
354:   }
355:   return(0);
356: }

358: /*
359:    PetscViewer writes to MATLAB .mat file
360: */
361: PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutArray(PetscViewer,int,int,const PetscScalar*,const char*);
362: PETSC_EXTERN PetscErrorCode PetscViewerMatlabGetArray(PetscViewer,int,int,PetscScalar*,const char*);
363: PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutVariable(PetscViewer,const char*,void*);

365: #if defined(PETSC_HAVE_AMS)
366: PETSC_EXTERN PetscErrorCode PetscObjectViewAMS(PetscObject,PetscViewer);
367: #endif

369: /*S
370:      PetscViewers - Abstract collection of PetscViewers. It is just an expandable array of viewers.

372:    Level: intermediate

374:   Concepts: viewing

376: .seealso:  PetscViewerCreate(), PetscViewerSetType(), PetscViewerType, PetscViewer, PetscViewersCreate(),
377:            PetscViewersGetViewer()
378: S*/
379: typedef struct _n_PetscViewers* PetscViewers;
380: PETSC_EXTERN PetscErrorCode PetscViewersCreate(MPI_Comm,PetscViewers*);
381: PETSC_EXTERN PetscErrorCode PetscViewersDestroy(PetscViewers*);
382: PETSC_EXTERN PetscErrorCode PetscViewersGetViewer(PetscViewers,PetscInt,PetscViewer*);

384: /* Reset __FUNCT__ in case the user does not define it themselves */

388: #endif