petsc-3.7.5 2017-01-01
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PetscOptionsGetViewer

 Gets a viewer appropriate for the type indicated by the user

Synopsis

#include "petscviewer.h" 
PetscErrorCode  PetscOptionsGetViewer(MPI_Comm comm,const char pre[],const char name[],PetscViewer *viewer,PetscViewerFormat *format,PetscBool  *set)
Collective on MPI_Comm

Input Parameters

comm - the communicator to own the viewer
pre - the string to prepend to the name or NULL
name - the option one is seeking

Output Parameter

viewer - the viewer, pass NULL if not needed
format - the PetscViewerFormat requested by the user, pass NULL if not needed
set - PETSC_TRUE if found, else PETSC_FALSE

Notes: If no value is provided ascii:stdout is used 

      ascii[:[filename][:[format][:append]]]    defaults to stdout - format can be one of ascii_info, ascii_info_detail, or ascii_matlab,
for example ascii::ascii_info prints just the information about the object not all details unless :append is given filename opens in write mode, overwriting what was already there 
      binary[:[filename][:[format][:append]]]   defaults to the file binaryoutput

      draw[:drawtype]                           for example, draw:tikz  or draw:x

      socket[:port]                             defaults to the standard output port

      saws[:communicatorname]                    publishes object to the Scientific Application Webserver (SAWs)

Use PetscViewerDestroy() after using the viewer, otherwise a memory leak will occur

If PETSc is configured with --with-viewfromoptions=0 this function always returns with *set of PETSC_FALSE

See Also

PetscOptionsGetReal(), PetscOptionsHasName(), PetscOptionsGetString(),
PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsBool() PetscOptionsInt(), PetscOptionsString(), PetscOptionsReal(), PetscOptionsBool(), PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHead(), PetscOptionsStringArray(),PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(), PetscOptionsFList(), PetscOptionsEList()

Level:intermediate
Location:src/sys/classes/viewer/interface/viewreg.c
Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/sys/classes/viewer/examples/tutorials/ex2.c.html
src/sys/examples/tutorials/ex15.c.html
src/dm/impls/forest/examples/tutorials/ex1.c.html