PetscViewerBinaryOpen#
Opens a file for binary input/output.
Synopsis#
#include "petscviewer.h"
PetscErrorCode PetscViewerBinaryOpen(MPI_Comm comm, const char name[], PetscFileMode mode, PetscViewer *viewer)
Collective
Input Parameters#
comm - MPI communicator
name - name of file
mode - open mode of file
FILE_MODE_WRITE - create new file for binary output
FILE_MODE_READ - open existing file for binary input
FILE_MODE_APPEND - open existing file for binary output
Output Parameter#
viewer - PetscViewer for binary input/output to use with the specified file
Options Database Keys#
-viewer_binary_filename
- name of file to use-viewer_binary_skip_info - true to skip opening an info file
-viewer_binary_skip_options - true to not use options database while creating viewer
-viewer_binary_skip_header - true to skip output object headers to the file
-viewer_binary_mpiio - true to use MPI-IO for input and output to the file (more scalable for large problems)
Note#
This PetscViewer should be destroyed with PetscViewerDestroy().
For reading files, the filename may begin with ftp:// or http:// and/or end with .gz; in this case file is brought over and uncompressed.
For creating files, if the file name ends with .gz it is automatically compressed when closed.
See Also#
Viewers: Looking at PETSc Objects, PETSCVIEWERBINARY, PetscViewerASCIIOpen(), PetscViewerPushFormat(), PetscViewerDestroy(),
VecView(), MatView(), VecLoad(), MatLoad(), PetscViewerBinaryGetDescriptor(),
PetscViewerBinaryGetInfoPointer(), PetscFileMode, PetscViewer, PetscViewerBinaryRead(), PetscViewerBinarySetUseMPIIO(),
PetscViewerBinaryGetUseMPIIO(), PetscViewerBinaryGetMPIIOOffset()
Level#
beginner
Location#
Examples#
src/mat/tutorials/ex12.c
src/ksp/pc/tutorials/ex4.c
src/ksp/ksp/tutorials/ex75f.F90
src/mat/tutorials/ex16.c
src/tao/constrained/tutorials/maros.c
src/mat/tutorials/ex1.c
src/dm/tutorials/ex7.c
src/tao/leastsquares/tutorials/tomography.c
src/snes/tutorials/ex30.c
src/tao/constrained/tutorials/tomographyADMM.c
Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages