1 /* 2 PetscViewers are objects where other objects can be looked at or stored. 3 */ 4 5 #if !defined(__PETSCVIEWER_H) 6 #define __PETSCVIEWER_H 7 8 #include <petscsys.h> 9 #include <petscviewertypes.h> 10 11 PETSC_EXTERN PetscClassId PETSC_VIEWER_CLASSID; 12 13 /*J 14 PetscViewerType - String with the name of a PETSc PETScViewer 15 16 Level: beginner 17 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 PETSCVIEWERHDF5 "hdf5" 29 #define PETSCVIEWERVTK "vtk" 30 #define PETSCVIEWERMATLAB "matlab" 31 #define PETSCVIEWERSAWS "saws" 32 33 PETSC_EXTERN PetscFunctionList PetscViewerList; 34 PETSC_EXTERN PetscErrorCode PetscViewerInitializePackage(void); 35 36 PETSC_EXTERN PetscErrorCode PetscViewerRegister(const char[],PetscErrorCode (*)(PetscViewer)); 37 38 PETSC_EXTERN PetscErrorCode PetscViewerCreate(MPI_Comm,PetscViewer*); 39 PETSC_EXTERN PetscErrorCode PetscViewerSetFromOptions(PetscViewer); 40 PETSC_EXTERN PetscErrorCode PetscViewerASCIIOpenWithFILE(MPI_Comm,FILE*,PetscViewer*); 41 42 PETSC_EXTERN PetscErrorCode PetscViewerASCIIOpen(MPI_Comm,const char[],PetscViewer*); 43 PETSC_EXTERN PetscErrorCode PetscViewerASCIISetFILE(PetscViewer,FILE*); 44 PETSC_EXTERN PetscErrorCode PetscViewerBinaryOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*); 45 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetFlowControl(PetscViewer,PetscInt*); 46 PETSC_EXTERN PetscErrorCode PetscViewerBinarySetFlowControl(PetscViewer,PetscInt); 47 PETSC_EXTERN PetscErrorCode PetscViewerBinarySetUseMPIIO(PetscViewer,PetscBool); 48 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetUseMPIIO(PetscViewer,PetscBool *); 49 #if defined(PETSC_HAVE_MPIIO) 50 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetMPIIODescriptor(PetscViewer,MPI_File*); 51 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetMPIIOOffset(PetscViewer,MPI_Offset*); 52 PETSC_EXTERN PetscErrorCode PetscViewerBinaryAddMPIIOOffset(PetscViewer,MPI_Offset); 53 #endif 54 55 PETSC_EXTERN PetscErrorCode PetscViewerSocketOpen(MPI_Comm,const char[],int,PetscViewer*); 56 PETSC_EXTERN PetscErrorCode PetscViewerStringOpen(MPI_Comm,char[],size_t,PetscViewer*); 57 PETSC_EXTERN PetscErrorCode PetscViewerDrawOpen(MPI_Comm,const char[],const char[],int,int,int,int,PetscViewer*); 58 #include <petscdrawtypes.h> 59 PETSC_EXTERN PetscErrorCode PetscViewerDrawSetDrawType(PetscViewer,PetscDrawType); 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*); 63 64 PETSC_EXTERN PetscErrorCode PetscViewerGetType(PetscViewer,PetscViewerType*); 65 PETSC_EXTERN PetscErrorCode PetscViewerSetType(PetscViewer,PetscViewerType); 66 PETSC_EXTERN PetscErrorCode PetscViewerDestroy(PetscViewer*); 67 PETSC_EXTERN PetscErrorCode PetscViewerGetSubViewer(PetscViewer,MPI_Comm,PetscViewer*); 68 PETSC_EXTERN PetscErrorCode PetscViewerRestoreSubViewer(PetscViewer,MPI_Comm,PetscViewer*); 69 70 PETSC_EXTERN PetscErrorCode PetscViewerSetUp(PetscViewer); 71 PETSC_EXTERN PetscErrorCode PetscViewerView(PetscViewer,PetscViewer); 72 PETSC_STATIC_INLINE PetscErrorCode PetscViewerViewFromOptions(PetscViewer A,PetscObject obj,const char name[]) {return PetscObjectViewFromOptions((PetscObject)A,obj,name);} 73 74 PETSC_EXTERN PetscErrorCode PetscViewerSetOptionsPrefix(PetscViewer,const char[]); 75 PETSC_EXTERN PetscErrorCode PetscViewerAppendOptionsPrefix(PetscViewer,const char[]); 76 PETSC_EXTERN PetscErrorCode PetscViewerGetOptionsPrefix(PetscViewer,const char*[]); 77 78 /*E 79 PetscViewerFormat - Way a viewer presents the object 80 81 Level: beginner 82 83 The values below are also listed in petsc/finclude/petscviewer.h. If another values is added below it 84 must also be added there. 85 86 .seealso: PetscViewer, PetscViewerType, PetscViewerPushFormat(), PetscViewerPopFormat() 87 E*/ 88 typedef enum { 89 PETSC_VIEWER_DEFAULT, 90 PETSC_VIEWER_ASCII_MATLAB, 91 PETSC_VIEWER_ASCII_MATHEMATICA, 92 PETSC_VIEWER_ASCII_IMPL, 93 PETSC_VIEWER_ASCII_INFO, 94 PETSC_VIEWER_ASCII_INFO_DETAIL, 95 PETSC_VIEWER_ASCII_COMMON, 96 PETSC_VIEWER_ASCII_SYMMODU, 97 PETSC_VIEWER_ASCII_INDEX, 98 PETSC_VIEWER_ASCII_DENSE, 99 PETSC_VIEWER_ASCII_MATRIXMARKET, 100 PETSC_VIEWER_ASCII_VTK, 101 PETSC_VIEWER_ASCII_VTK_CELL, 102 PETSC_VIEWER_ASCII_VTK_COORDS, 103 PETSC_VIEWER_ASCII_PCICE, 104 PETSC_VIEWER_ASCII_PYTHON, 105 PETSC_VIEWER_ASCII_FACTOR_INFO, 106 PETSC_VIEWER_ASCII_LATEX, 107 PETSC_VIEWER_ASCII_XML, 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_VTR, 114 PETSC_VIEWER_VTK_VTU, 115 PETSC_VIEWER_BINARY_MATLAB, 116 PETSC_VIEWER_NATIVE, 117 PETSC_VIEWER_HDF5_VIZ, 118 PETSC_VIEWER_NOFORMAT 119 } PetscViewerFormat; 120 PETSC_EXTERN const char *const PetscViewerFormats[]; 121 122 PETSC_EXTERN PETSC_DEPRECATED("Use PetscViewerPushFormat()/PetscViewerPopFormat()") PetscErrorCode PetscViewerSetFormat(PetscViewer,PetscViewerFormat); 123 PETSC_EXTERN PetscErrorCode PetscViewerPushFormat(PetscViewer,PetscViewerFormat); 124 PETSC_EXTERN PetscErrorCode PetscViewerPopFormat(PetscViewer); 125 PETSC_EXTERN PetscErrorCode PetscViewerGetFormat(PetscViewer,PetscViewerFormat*); 126 PETSC_EXTERN PetscErrorCode PetscViewerFlush(PetscViewer); 127 128 PETSC_EXTERN PetscErrorCode PetscOptionsPushGetViewerOff(PetscBool); 129 PETSC_EXTERN PetscErrorCode PetscOptionsPopGetViewerOff(void); 130 PETSC_EXTERN PetscErrorCode PetscOptionsGetViewerOff(PetscBool*); 131 PETSC_EXTERN PetscErrorCode PetscOptionsGetViewer(MPI_Comm,const char[],const char[],PetscViewer*,PetscViewerFormat*,PetscBool*); 132 #define PetscOptionsViewer(a,b,c,d,e,f) PetscOptionsViewer_Private(PetscOptionsObject,a,b,c,d,e,f); 133 PETSC_EXTERN PetscErrorCode PetscOptionsViewer_Private(PetscOptionItems*,const char[],const char[],const char[],PetscViewer*,PetscViewerFormat *,PetscBool *); 134 135 typedef struct {PetscViewer viewer;PetscViewerFormat format;} PetscViewerAndFormat; 136 PETSC_EXTERN PetscErrorCode PetscViewerAndFormatCreate(PetscViewer,PetscViewerFormat,PetscViewerAndFormat**); 137 PETSC_EXTERN PetscErrorCode PetscViewerAndFormatDestroy(PetscViewerAndFormat**); 138 139 /* 140 Operations explicit to a particular class of viewers 141 */ 142 143 PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetPointer(PetscViewer,FILE**); 144 PETSC_EXTERN PetscErrorCode PetscViewerFileGetMode(PetscViewer,PetscFileMode*); 145 PETSC_EXTERN PetscErrorCode PetscViewerFileSetMode(PetscViewer,PetscFileMode); 146 PETSC_EXTERN PetscErrorCode PetscViewerRead(PetscViewer,void*,PetscInt,PetscInt*,PetscDataType); 147 PETSC_EXTERN PetscErrorCode PetscViewerASCIIPrintf(PetscViewer,const char[],...); 148 PETSC_EXTERN PetscErrorCode PetscViewerASCIISynchronizedPrintf(PetscViewer,const char[],...); 149 PETSC_EXTERN PetscErrorCode PetscViewerASCIIPushSynchronized(PetscViewer); 150 PETSC_EXTERN PetscErrorCode PetscViewerASCIIPopSynchronized(PetscViewer); 151 PETSC_EXTERN PetscErrorCode PetscViewerASCIIPushTab(PetscViewer); 152 PETSC_EXTERN PetscErrorCode PetscViewerASCIIPopTab(PetscViewer); 153 PETSC_EXTERN PetscErrorCode PetscViewerASCIIUseTabs(PetscViewer,PetscBool ); 154 PETSC_EXTERN PetscErrorCode PetscViewerASCIISetTab(PetscViewer,PetscInt); 155 PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetTab(PetscViewer,PetscInt*); 156 PETSC_EXTERN PetscErrorCode PetscViewerASCIIAddTab(PetscViewer,PetscInt); 157 PETSC_EXTERN PetscErrorCode PetscViewerASCIISubtractTab(PetscViewer,PetscInt); 158 PETSC_EXTERN PetscErrorCode PetscViewerASCIIRead(PetscViewer,void *,PetscInt,PetscInt*,PetscDataType); 159 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetDescriptor(PetscViewer,int*); 160 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetInfoPointer(PetscViewer,FILE **); 161 PETSC_EXTERN PetscErrorCode PetscViewerBinaryRead(PetscViewer,void*,PetscInt,PetscInt*,PetscDataType); 162 PETSC_EXTERN PetscErrorCode PetscViewerBinaryWrite(PetscViewer,void*,PetscInt,PetscDataType,PetscBool ); 163 PETSC_EXTERN PetscErrorCode PetscViewerStringSPrintf(PetscViewer,const char[],...); 164 PETSC_EXTERN PetscErrorCode PetscViewerStringSetString(PetscViewer,char[],PetscInt); 165 PETSC_EXTERN PetscErrorCode PetscViewerDrawClear(PetscViewer); 166 PETSC_EXTERN PetscErrorCode PetscViewerDrawSetHold(PetscViewer,PetscBool); 167 PETSC_EXTERN PetscErrorCode PetscViewerDrawGetHold(PetscViewer,PetscBool*); 168 PETSC_EXTERN PetscErrorCode PetscViewerDrawSetPause(PetscViewer,PetscReal); 169 PETSC_EXTERN PetscErrorCode PetscViewerDrawGetPause(PetscViewer,PetscReal*); 170 PETSC_EXTERN PetscErrorCode PetscViewerDrawSetInfo(PetscViewer,const char[],const char[],int,int,int,int); 171 PETSC_EXTERN PetscErrorCode PetscViewerDrawResize(PetscViewer,int,int); 172 PETSC_EXTERN PetscErrorCode PetscViewerDrawSetBounds(PetscViewer,PetscInt,const PetscReal*); 173 PETSC_EXTERN PetscErrorCode PetscViewerDrawGetBounds(PetscViewer,PetscInt*,const PetscReal**); 174 PETSC_EXTERN PetscErrorCode PetscViewerSocketSetConnection(PetscViewer,const char[],int); 175 PETSC_EXTERN PetscErrorCode PetscViewerBinarySkipInfo(PetscViewer); 176 PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipInfo(PetscViewer,PetscBool); 177 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipInfo(PetscViewer,PetscBool*); 178 PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipOptions(PetscViewer,PetscBool ); 179 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipOptions(PetscViewer,PetscBool *); 180 PETSC_EXTERN PetscErrorCode PetscViewerBinarySetSkipHeader(PetscViewer,PetscBool); 181 PETSC_EXTERN PetscErrorCode PetscViewerBinaryGetSkipHeader(PetscViewer,PetscBool*); 182 PETSC_EXTERN PetscErrorCode PetscViewerBinaryReadStringArray(PetscViewer,char***); 183 PETSC_EXTERN PetscErrorCode PetscViewerBinaryWriteStringArray(PetscViewer,char**); 184 185 PETSC_EXTERN PetscErrorCode PetscViewerFileSetName(PetscViewer,const char[]); 186 PETSC_EXTERN PetscErrorCode PetscViewerFileGetName(PetscViewer,const char**); 187 188 PETSC_EXTERN PetscErrorCode PetscViewerVUGetPointer(PetscViewer, FILE**); 189 PETSC_EXTERN PetscErrorCode PetscViewerVUSetVecSeen(PetscViewer, PetscBool ); 190 PETSC_EXTERN PetscErrorCode PetscViewerVUGetVecSeen(PetscViewer, PetscBool *); 191 PETSC_EXTERN PetscErrorCode PetscViewerVUPrintDeferred(PetscViewer, const char [], ...); 192 PETSC_EXTERN PetscErrorCode PetscViewerVUFlushDeferred(PetscViewer); 193 194 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaInitializePackage(void); 195 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaFinalizePackage(void); 196 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaGetName(PetscViewer, const char **); 197 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSetName(PetscViewer, const char []); 198 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaClearName(PetscViewer); 199 PETSC_EXTERN PetscErrorCode PetscViewerMathematicaSkipPackets(PetscViewer, int); 200 201 PETSC_EXTERN PetscErrorCode PetscViewerSiloGetName(PetscViewer, char **); 202 PETSC_EXTERN PetscErrorCode PetscViewerSiloSetName(PetscViewer, const char []); 203 PETSC_EXTERN PetscErrorCode PetscViewerSiloClearName(PetscViewer); 204 PETSC_EXTERN PetscErrorCode PetscViewerSiloGetMeshName(PetscViewer, char **); 205 PETSC_EXTERN PetscErrorCode PetscViewerSiloSetMeshName(PetscViewer, const char []); 206 PETSC_EXTERN PetscErrorCode PetscViewerSiloClearMeshName(PetscViewer); 207 208 typedef enum {PETSC_VTK_POINT_FIELD, PETSC_VTK_POINT_VECTOR_FIELD, PETSC_VTK_CELL_FIELD, PETSC_VTK_CELL_VECTOR_FIELD} PetscViewerVTKFieldType; 209 PETSC_EXTERN PetscErrorCode PetscViewerVTKAddField(PetscViewer,PetscObject,PetscErrorCode (*PetscViewerVTKWriteFunction)(PetscObject,PetscViewer),PetscViewerVTKFieldType,PetscObject); 210 PETSC_EXTERN PetscErrorCode PetscViewerVTKOpen(MPI_Comm,const char[],PetscFileMode,PetscViewer*); 211 212 /* 213 These are all the default viewers that do not have to be explicitly opened 214 */ 215 PETSC_EXTERN PetscViewer PETSC_VIEWER_STDOUT_(MPI_Comm); 216 PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStdout(MPI_Comm,PetscViewer*); 217 PETSC_EXTERN PetscViewer PETSC_VIEWER_STDERR_(MPI_Comm); 218 PETSC_EXTERN PetscErrorCode PetscViewerASCIIGetStderr(MPI_Comm,PetscViewer*); 219 PETSC_EXTERN PetscViewer PETSC_VIEWER_DRAW_(MPI_Comm); 220 PETSC_EXTERN PetscViewer PETSC_VIEWER_SOCKET_(MPI_Comm); 221 PETSC_EXTERN PetscViewer PETSC_VIEWER_BINARY_(MPI_Comm); 222 PETSC_EXTERN PetscViewer PETSC_VIEWER_MATLAB_(MPI_Comm); 223 PETSC_EXTERN PetscViewer PETSC_VIEWER_HDF5_(MPI_Comm); 224 PETSC_EXTERN PetscViewer PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE; 225 226 #define PETSC_VIEWER_STDERR_SELF PETSC_VIEWER_STDERR_(PETSC_COMM_SELF) 227 #define PETSC_VIEWER_STDERR_WORLD PETSC_VIEWER_STDERR_(PETSC_COMM_WORLD) 228 229 /*MC 230 PETSC_VIEWER_STDOUT_WORLD - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD) 231 232 Level: beginner 233 M*/ 234 #define PETSC_VIEWER_STDOUT_WORLD PETSC_VIEWER_STDOUT_(PETSC_COMM_WORLD) 235 236 /*MC 237 PETSC_VIEWER_STDOUT_SELF - same as PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF) 238 239 Level: beginner 240 M*/ 241 #define PETSC_VIEWER_STDOUT_SELF PETSC_VIEWER_STDOUT_(PETSC_COMM_SELF) 242 243 /*MC 244 PETSC_VIEWER_DRAW_WORLD - same as PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD) 245 246 Level: intermediate 247 M*/ 248 #define PETSC_VIEWER_DRAW_WORLD PETSC_VIEWER_DRAW_(PETSC_COMM_WORLD) 249 250 /*MC 251 PETSC_VIEWER_DRAW_SELF - same as PETSC_VIEWER_DRAW_(PETSC_COMM_SELF) 252 253 Level: intermediate 254 M*/ 255 #define PETSC_VIEWER_DRAW_SELF PETSC_VIEWER_DRAW_(PETSC_COMM_SELF) 256 257 /*MC 258 PETSC_VIEWER_SOCKET_WORLD - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD) 259 260 Level: intermediate 261 M*/ 262 #define PETSC_VIEWER_SOCKET_WORLD PETSC_VIEWER_SOCKET_(PETSC_COMM_WORLD) 263 264 /*MC 265 PETSC_VIEWER_SOCKET_SELF - same as PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF) 266 267 Level: intermediate 268 M*/ 269 #define PETSC_VIEWER_SOCKET_SELF PETSC_VIEWER_SOCKET_(PETSC_COMM_SELF) 270 271 /*MC 272 PETSC_VIEWER_BINARY_WORLD - same as PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD) 273 274 Level: intermediate 275 M*/ 276 #define PETSC_VIEWER_BINARY_WORLD PETSC_VIEWER_BINARY_(PETSC_COMM_WORLD) 277 278 /*MC 279 PETSC_VIEWER_BINARY_SELF - same as PETSC_VIEWER_BINARY_(PETSC_COMM_SELF) 280 281 Level: intermediate 282 M*/ 283 #define PETSC_VIEWER_BINARY_SELF PETSC_VIEWER_BINARY_(PETSC_COMM_SELF) 284 285 /*MC 286 PETSC_VIEWER_MATLAB_WORLD - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD) 287 288 Level: intermediate 289 M*/ 290 #define PETSC_VIEWER_MATLAB_WORLD PETSC_VIEWER_MATLAB_(PETSC_COMM_WORLD) 291 292 /*MC 293 PETSC_VIEWER_MATLAB_SELF - same as PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF) 294 295 Level: intermediate 296 M*/ 297 #define PETSC_VIEWER_MATLAB_SELF PETSC_VIEWER_MATLAB_(PETSC_COMM_SELF) 298 299 #define PETSC_VIEWER_MATHEMATICA_WORLD (PetscViewerInitializeMathematicaWorld_Private(),PETSC_VIEWER_MATHEMATICA_WORLD_PRIVATE) 300 301 PETSC_EXTERN PetscErrorCode PetscViewerFlowControlStart(PetscViewer,PetscInt*,PetscInt*); 302 PETSC_EXTERN PetscErrorCode PetscViewerFlowControlStepMaster(PetscViewer,PetscInt,PetscInt*,PetscInt); 303 PETSC_EXTERN PetscErrorCode PetscViewerFlowControlEndMaster(PetscViewer,PetscInt*); 304 PETSC_EXTERN PetscErrorCode PetscViewerFlowControlStepWorker(PetscViewer,PetscMPIInt,PetscInt*); 305 PETSC_EXTERN PetscErrorCode PetscViewerFlowControlEndWorker(PetscViewer,PetscInt*); 306 307 /* 308 PetscViewer writes to MATLAB .mat file 309 */ 310 PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutArray(PetscViewer,int,int,const PetscScalar*,const char*); 311 PETSC_EXTERN PetscErrorCode PetscViewerMatlabGetArray(PetscViewer,int,int,PetscScalar*,const char*); 312 PETSC_EXTERN PetscErrorCode PetscViewerMatlabPutVariable(PetscViewer,const char*,void*); 313 314 #if defined(PETSC_HAVE_SAWS) 315 PETSC_EXTERN PetscErrorCode PetscObjectViewSAWs(PetscObject,PetscViewer); 316 #endif 317 318 /*S 319 PetscViewers - Abstract collection of PetscViewers. It is just an expandable array of viewers. 320 321 Level: intermediate 322 323 Concepts: viewing 324 325 .seealso: PetscViewerCreate(), PetscViewerSetType(), PetscViewerType, PetscViewer, PetscViewersCreate(), 326 PetscViewersGetViewer() 327 S*/ 328 typedef struct _n_PetscViewers* PetscViewers; 329 PETSC_EXTERN PetscErrorCode PetscViewersCreate(MPI_Comm,PetscViewers*); 330 PETSC_EXTERN PetscErrorCode PetscViewersDestroy(PetscViewers*); 331 PETSC_EXTERN PetscErrorCode PetscViewersGetViewer(PetscViewers,PetscInt,PetscViewer*); 332 333 #endif 334