PetscViewerRead#

Reads data from a PetscViewer

Synopsis#

#include "petscviewer.h" 
PetscErrorCode PetscViewerRead(PetscViewer viewer, void *data, PetscInt num, PetscInt *count, PetscDataType dtype)

Collective

Input Parameters#

  • viewer - The viewer

  • data - Location to write the data, treated as an array of the type defined by datatype

  • num - Number of items of data to read

  • datatype - Type of data to read

Output Parameter#

  • count - number of items of data actually read, or NULL

Notes#

If datatype is PETSC_STRING and num is negative, reads until a newline character is found, until a maximum of (-num - 1) chars.

Only certain viewers, such as PETSCVIEWERBINARY can be read from, see PetscViewerReadable()

See Also#

Viewers: Looking at PETSc Objects, PetscViewer, PetscViewerASCIIOpen(), PetscViewerPushFormat(), PetscViewerDestroy(), PetscViewerReadable(), PetscViewerBinaryGetDescriptor(), PetscViewerBinaryGetInfoPointer(), PetscFileMode, PetscViewer

Level#

beginner

Location#

src/sys/classes/viewer/interface/view.c

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Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages