Actual source code: petscviewer.h
petsc-3.4.2 2013-07-02

      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 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