Actual source code: petscviewer.h
petsc-dev 2014-02-02
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 PETSCVIEWERSAWS "saws"
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: #include <petscdrawtypes.h>
61: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetDrawType(PetscViewer,PetscDrawType);
62: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaOpen(MPI_Comm, int, const char[], const char[], PetscViewer *);
63: PETSC_EXTERN PetscErrorCode PetscViewerSiloOpen(MPI_Comm, const char[], PetscViewer *);
64: PETSC_EXTERN PetscErrorCode PetscViewerMatlabOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);
66: PETSC_EXTERN PetscErrorCode PetscViewerGetType(PetscViewer,PetscViewerType*);
67: PETSC_EXTERN PetscErrorCode PetscViewerSetType(PetscViewer,PetscViewerType);
68: PETSC_EXTERN PetscErrorCode PetscViewerDestroy(PetscViewer*);
69: PETSC_EXTERN PetscErrorCode PetscViewerGetSingleton(PetscViewer,PetscViewer*);
70: PETSC_EXTERN PetscErrorCode PetscViewerRestoreSingleton(PetscViewer,PetscViewer*);
71: PETSC_EXTERN PetscErrorCode PetscViewerGetSubcomm(PetscViewer,MPI_Comm,PetscViewer*);
72: PETSC_EXTERN PetscErrorCode PetscViewerRestoreSubcomm(PetscViewer,MPI_Comm,PetscViewer*);
74: PETSC_EXTERN PetscErrorCode PetscViewerSetUp(PetscViewer);
75: PETSC_EXTERN PetscErrorCode PetscViewerView(PetscViewer,PetscViewer);
76: PETSC_STATIC_INLINE PetscErrorCode PetscViewerViewFromOptions(PetscViewer A,const char prefix[],const char name[]) {return PetscObjectViewFromOptions((PetscObject)A,prefix,name);}
78: PETSC_EXTERN PetscErrorCode PetscViewerSetOptionsPrefix(PetscViewer,const char[]);
79: PETSC_EXTERN PetscErrorCode PetscViewerAppendOptionsPrefix(PetscViewer,const char[]);
80: PETSC_EXTERN PetscErrorCode PetscViewerGetOptionsPrefix(PetscViewer,const char*[]);
82: /*E
83: PetscViewerFormat - Way a viewer presents the object
85: Level: beginner
87: The values below are also listed in finclude/petscviewer.h. If another values is added below it
88: must also be added there.
90: .seealso: PetscViewerSetFormat(), PetscViewer, PetscViewerType, PetscViewerPushFormat(), PetscViewerPopFormat()
91: E*/
92: typedef enum {
93: PETSC_VIEWER_DEFAULT,
94: PETSC_VIEWER_ASCII_MATLAB,
95: PETSC_VIEWER_ASCII_MATHEMATICA,
96: PETSC_VIEWER_ASCII_IMPL,
97: PETSC_VIEWER_ASCII_INFO,
98: PETSC_VIEWER_ASCII_INFO_DETAIL,
99: PETSC_VIEWER_ASCII_COMMON,
100: PETSC_VIEWER_ASCII_SYMMODU,
101: PETSC_VIEWER_ASCII_INDEX,
102: PETSC_VIEWER_ASCII_DENSE,
103: PETSC_VIEWER_ASCII_MATRIXMARKET,
104: PETSC_VIEWER_ASCII_VTK,
105: PETSC_VIEWER_ASCII_VTK_CELL,
106: PETSC_VIEWER_ASCII_VTK_COORDS,
107: PETSC_VIEWER_ASCII_PCICE,
108: PETSC_VIEWER_ASCII_PYTHON,
109: PETSC_VIEWER_ASCII_FACTOR_INFO,
110: PETSC_VIEWER_ASCII_LATEX,
111: PETSC_VIEWER_DRAW_BASIC,
112: PETSC_VIEWER_DRAW_LG,
113: PETSC_VIEWER_DRAW_CONTOUR,
114: PETSC_VIEWER_DRAW_PORTS,
115: PETSC_VIEWER_VTK_VTS,
116: PETSC_VIEWER_VTK_VTR,
117: PETSC_VIEWER_VTK_VTU,
118: PETSC_VIEWER_BINARY_MATLAB,
119: PETSC_VIEWER_NATIVE,
120: PETSC_VIEWER_NOFORMAT
121: } PetscViewerFormat;
122: PETSC_EXTERN const char *const PetscViewerFormats[];
124: PETSC_EXTERN PetscErrorCode PetscViewerSetFormat(PetscViewer,PetscViewerFormat);
125: PETSC_EXTERN PetscErrorCode PetscViewerPushFormat(PetscViewer,PetscViewerFormat);
126: PETSC_EXTERN PetscErrorCode PetscViewerPopFormat(PetscViewer);
127: PETSC_EXTERN PetscErrorCode PetscViewerGetFormat(PetscViewer,PetscViewerFormat*);
128: PETSC_EXTERN PetscErrorCode PetscViewerFlush(PetscViewer);
130: PETSC_EXTERN PetscErrorCode PetscOptionsGetViewer(MPI_Comm,const char[],const char[],PetscViewer*,PetscViewerFormat*,PetscBool*);
131: PETSC_EXTERN PetscErrorCode PetscOptionsViewer(const char[],const char[],const char[],PetscViewer*,PetscViewerFormat *,PetscBool *);
133: /*
134: Operations explicit to a particular class of viewers
135: */
137: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetPointer(PetscViewer,FILE**);
138: PETSC_EXTERN PetscErrorCode PetscViewerFileGetMode(PetscViewer,PetscFileMode*);
139: PETSC_EXTERN PetscErrorCode PetscViewerFileSetMode(PetscViewer,PetscFileMode);
140: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPrintf(PetscViewer,const char[],...);
141: PETSC_EXTERN PetscErrorCode PetscViewerASCIISynchronizedPrintf(PetscViewer,const char[],...);
142: PETSC_EXTERN PetscErrorCode PetscViewerASCIISynchronizedAllow(PetscViewer,PetscBool);
143: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPushTab(PetscViewer);
144: PETSC_EXTERN PetscErrorCode PetscViewerASCIIPopTab(PetscViewer);
145: PETSC_EXTERN PetscErrorCode PetscViewerASCIIUseTabs(PetscViewer,PetscBool );
146: PETSC_EXTERN PetscErrorCode PetscViewerASCIISetTab(PetscViewer,PetscInt);
147: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetTab(PetscViewer,PetscInt*);
148: PETSC_EXTERN PetscErrorCode PetscViewerASCIIAddTab(PetscViewer,PetscInt);
149: PETSC_EXTERN PetscErrorCode PetscViewerASCIISubtractTab(PetscViewer,PetscInt);
150: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetDescriptor(PetscViewer,int*);
151: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetInfoPointer(PetscViewer,FILE **);
152: PETSC_EXTERN PetscErrorCode PetscViewerBinaryRead(PetscViewer,void*,PetscInt,PetscDataType);
153: PETSC_EXTERN PetscErrorCode PetscViewerBinaryWrite(PetscViewer,void*,PetscInt,PetscDataType,PetscBool );
154: PETSC_EXTERN PetscErrorCode PetscViewerStringSPrintf(PetscViewer,const char[],...);
155: PETSC_EXTERN PetscErrorCode PetscViewerStringSetString(PetscViewer,char[],PetscInt);
156: PETSC_EXTERN PetscErrorCode PetscViewerDrawClear(PetscViewer);
157: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetHold(PetscViewer,PetscBool);
158: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetHold(PetscViewer,PetscBool*);
159: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetPause(PetscViewer,PetscReal);
160: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetPause(PetscViewer,PetscReal*);
161: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetInfo(PetscViewer,const char[],const char[],int,int,int,int);
162: PETSC_EXTERN PetscErrorCode PetscViewerDrawResize(PetscViewer,int,int);
163: PETSC_EXTERN PetscErrorCode PetscViewerDrawSetBounds(PetscViewer,PetscInt,const PetscReal*);
164: PETSC_EXTERN PetscErrorCode PetscViewerDrawGetBounds(PetscViewer,PetscInt*,const PetscReal**);
165: PETSC_EXTERN PetscErrorCode PetscViewerSocketSetConnection(PetscViewer,const char[],int);
166: PETSC_EXTERN PetscErrorCode PetscViewerBinarySkipInfo(PetscViewer);
167: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipOptions(PetscViewer,PetscBool );
168: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipOptions(PetscViewer,PetscBool *);
169: PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipHeader(PetscViewer,PetscBool);
170: PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipHeader(PetscViewer,PetscBool*);
171: PETSC_EXTERN PetscErrorCode PetscViewerBinaryReadStringArray(PetscViewer,char***);
172: PETSC_EXTERN PetscErrorCode PetscViewerBinaryWriteStringArray(PetscViewer,char**);
174: PETSC_EXTERN PetscErrorCode PetscViewerFileSetName(PetscViewer,const char[]);
175: PETSC_EXTERN PetscErrorCode PetscViewerFileGetName(PetscViewer,const char**);
177: PETSC_EXTERN PetscErrorCode PetscViewerVUGetPointer(PetscViewer, FILE**);
178: PETSC_EXTERN PetscErrorCode PetscViewerVUSetVecSeen(PetscViewer, PetscBool );
179: PETSC_EXTERN PetscErrorCode PetscViewerVUGetVecSeen(PetscViewer, PetscBool *);
180: PETSC_EXTERN PetscErrorCode PetscViewerVUPrintDeferred(PetscViewer, const char [], ...);
181: PETSC_EXTERN PetscErrorCode PetscViewerVUFlushDeferred(PetscViewer);
183: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaInitializePackage(void);
184: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaFinalizePackage(void);
185: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaGetName(PetscViewer, const char **);
186: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSetName(PetscViewer, const char []);
187: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaClearName(PetscViewer);
188: PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSkipPackets(PetscViewer, int);
190: PETSC_EXTERN PetscErrorCode PetscViewerSiloGetName(PetscViewer, char **);
191: PETSC_EXTERN PetscErrorCode PetscViewerSiloSetName(PetscViewer, const char []);
192: PETSC_EXTERN PetscErrorCode PetscViewerSiloClearName(PetscViewer);
193: PETSC_EXTERN PetscErrorCode PetscViewerSiloGetMeshName(PetscViewer, char **);
194: PETSC_EXTERN PetscErrorCode PetscViewerSiloSetMeshName(PetscViewer, const char []);
195: PETSC_EXTERN PetscErrorCode PetscViewerSiloClearMeshName(PetscViewer);
197: PETSC_EXTERN PetscErrorCode PetscViewerNetcdfOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);
198: PETSC_EXTERN PetscErrorCode PetscViewerNetcdfGetID(PetscViewer, int *);
200: typedef enum {PETSC_VTK_POINT_FIELD, PETSC_VTK_POINT_VECTOR_FIELD, PETSC_VTK_CELL_FIELD, PETSC_VTK_CELL_VECTOR_FIELD} PetscViewerVTKFieldType;
201: PETSC_EXTERN PetscErrorCode PetscViewerVTKAddField(PetscViewer,PetscObject,PetscErrorCode (*PetscViewerVTKWriteFunction)(PetscObject,PetscViewer),PetscViewerVTKFieldType,PetscObject);
202: PETSC_EXTERN PetscErrorCode PetscViewerVTKOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*);
204: /*
205: These are all the default viewers that do not have to be explicitly opened
206: */
207: PETSC_EXTERN PetscViewer PETSC_VIEWER_STDOUT_(MPI_Comm);
208: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStdout(MPI_Comm,PetscViewer*);
209: PETSC_EXTERN PetscViewer PETSC_VIEWER_STDERR_(MPI_Comm);
210: PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStderr(MPI_Comm,PetscViewer*);
211: PETSC_EXTERN PetscViewer PETSC_VIEWER_DRAW_(MPI_Comm);
212: PETSC_EXTERN PetscViewer PETSC_VIEWER_SOCKET_(MPI_Comm);
213: PETSC_EXTERN PetscViewer PETSC_VIEWER_BINARY_(MPI_Comm);
214: PETSC_EXTERN PetscViewer PETSC_VIEWER_MATLAB_(MPI_Comm);
215: PETSC_EXTERN PetscViewer PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE;
217: #define PETSC_VIEWER_STDERR_SELF PETSC_VIEWER_STDERR_(PETSC_COMM_SELF)
218: #define PETSC_VIEWER_STDERR_WORLD PETSC_VIEWER_STDERR_(PETSC_COMM_WORLD)
220: /*MC
221: PETSC_VIEWER_STDOUT_WORLD - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD)
223: Level: beginner
224: M*/
225: #define PETSC_VIEWER_STDOUT_WORLD PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD)
227: /*MC
228: PETSC_VIEWER_STDOUT_SELF - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF)
230: Level: beginner
231: M*/
232: #define PETSC_VIEWER_STDOUT_SELF PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF)
234: /*MC
235: PETSC_VIEWER_DRAW_WORLD - same as PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD)
237: Level: intermediate
238: M*/
239: #define PETSC_VIEWER_DRAW_WORLD PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD)
241: /*MC
242: PETSC_VIEWER_DRAW_SELF - same as PETSC_VIEWER_DRAW_(PETSC_COMM_SELF)
244: Level: intermediate
245: M*/
246: #define PETSC_VIEWER_DRAW_SELF PETSC_VIEWER_DRAW_(PETSC_COMM_SELF)
248: /*MC
249: PETSC_VIEWER_SOCKET_WORLD - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD)
251: Level: intermediate
252: M*/
253: #define PETSC_VIEWER_SOCKET_WORLD PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD)
255: /*MC
256: PETSC_VIEWER_SOCKET_SELF - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF)
258: Level: intermediate
259: M*/
260: #define PETSC_VIEWER_SOCKET_SELF PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF)
262: /*MC
263: PETSC_VIEWER_BINARY_WORLD - same as PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD)
265: Level: intermediate
266: M*/
267: #define PETSC_VIEWER_BINARY_WORLD PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD)
269: /*MC
270: PETSC_VIEWER_BINARY_SELF - same as PETSC_VIEWER_BINARY_(PETSC_COMM_SELF)
272: Level: intermediate
273: M*/
274: #define PETSC_VIEWER_BINARY_SELF PETSC_VIEWER_BINARY_(PETSC_COMM_SELF)
276: /*MC
277: PETSC_VIEWER_MATLAB_WORLD - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD)
279: Level: intermediate
280: M*/
281: #define PETSC_VIEWER_MATLAB_WORLD PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD)
283: /*MC
284: PETSC_VIEWER_MATLAB_SELF - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF)
286: Level: intermediate
287: M*/
288: #define PETSC_VIEWER_MATLAB_SELF PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF)
290: #define PETSC_VIEWER_MATHEMATICA_WORLD (PetscViewerInitializeMathematicaWorld_Private(),PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE)
294: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStart(PetscViewer viewer,PetscInt *mcnt,PetscInt *cnt)
295: {
298: PetscViewerBinaryGetFlowControl(viewer,mcnt);
299: PetscViewerBinaryGetFlowControl(viewer,cnt);
300: return(0);
301: }
305: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStepMaster(PetscViewer viewer,PetscInt i,PetscInt *mcnt,PetscInt cnt)
306: {
308: MPI_Comm comm;
311: PetscObjectGetComm((PetscObject)viewer,&comm);
312: if (i >= *mcnt) {
313: *mcnt += cnt;
314: MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
315: }
316: return(0);
317: }
321: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlEndMaster(PetscViewer viewer,PetscInt *mcnt)
322: {
324: MPI_Comm comm;
326: PetscObjectGetComm((PetscObject)viewer,&comm);
327: *mcnt = 0;
328: MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
329: return(0);
330: }
334: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlStepWorker(PetscViewer viewer,PetscMPIInt rank,PetscInt *mcnt)
335: {
337: MPI_Comm comm;
339: PetscObjectGetComm((PetscObject)viewer,&comm);
340: while (PETSC_TRUE) {
341: if (rank < *mcnt) break;
342: MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
343: }
344: return(0);
345: }
349: PETSC_STATIC_INLINE PetscErrorCode PetscViewerFlowControlEndWorker(PetscViewer viewer,PetscInt *mcnt)
350: {
352: MPI_Comm comm;
354: PetscObjectGetComm((PetscObject)viewer,&comm);
355: while (PETSC_TRUE) {
356: MPI_Bcast(mcnt,1,MPIU_INT,0,comm);
357: if (!*mcnt) break;
358: }
359: return(0);
360: }
362: /*
363: PetscViewer writes to MATLAB .mat file
364: */
365: PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutArray(PetscViewer,int,int,const PetscScalar*,const char*);
366: PETSC_EXTERN PetscErrorCode PetscViewerMatlabGetArray(PetscViewer,int,int,PetscScalar*,const char*);
367: PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutVariable(PetscViewer,const char*,void*);
369: #if defined(PETSC_HAVE_SAWS)
370: PETSC_EXTERN PetscErrorCode PetscObjectViewSAWs(PetscObject,PetscViewer);
371: #endif
373: /*S
374: PetscViewers - Abstract collection of PetscViewers. It is just an expandable array of viewers.
376: Level: intermediate
378: Concepts: viewing
380: .seealso: PetscViewerCreate(), PetscViewerSetType(), PetscViewerType, PetscViewer, PetscViewersCreate(),
381: PetscViewersGetViewer()
382: S*/
383: typedef struct _n_PetscViewers* PetscViewers;
384: PETSC_EXTERN PetscErrorCode PetscViewersCreate(MPI_Comm,PetscViewers*);
385: PETSC_EXTERN PetscErrorCode PetscViewersDestroy(PetscViewers*);
386: PETSC_EXTERN PetscErrorCode PetscViewersGetViewer(PetscViewers,PetscInt,PetscViewer*);
388: /* Reset __FUNCT__ in case the user does not define it themselves */
392: #endif