:orphan:
# PetscViewerBinaryRead
Reads from a binary file, all processors get the same result 
## Synopsis
```
#include "petscviewer.h"   
PetscErrorCode PetscViewerBinaryRead(PetscViewer viewer, void *data, PetscInt num, PetscInt *count, PetscDataType dtype)
```
Collective


## Input Parameters

- ***viewer -*** the `PETSCVIEWERBINARY` viewer
- ***num -*** number of items of data to read
- ***dtype -*** type of data to read



## Output Parameters

- ***data -*** location of the read data, treated as an array of the type indicated by `dtype`
- ***count -*** number of items of data actually read, or `NULL`.





## See Also
 [](sec_viewers), `PETSCVIEWERBINARY`, `PetscViewerASCIIOpen()`, `PetscViewerPushFormat()`, `PetscViewerDestroy()`,
`VecView()`, `MatView()`, `VecLoad()`, `MatLoad()`, `PetscViewerBinaryGetDescriptor()`,
`PetscViewerBinaryGetInfoPointer()`, `PetscFileMode`, `PetscViewer`, `PetscViewerBinaryRead()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/viewer/impls/binary/binv.c.html#PetscViewerBinaryRead">src/sys/classes/viewer/impls/binary/binv.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11_sa.c.html">src/ts/tutorials/ex11_sa.c</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/classes/viewer/impls/binary/binv.c)


[Index of all Viewer routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)