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 
- dtype - 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
Level#
beginner
Location#
src/sys/classes/viewer/interface/view.c
Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages