PetscBinaryRead

Reads from a binary file.

Synopsis

#include "petscsys.h"    
PetscErrorCode  PetscBinaryRead(int fd,void *p,PetscInt n,PetscDataType type)

Not Collective

Input Parameters

	fd	- the file
	n	- the number of items to read
	type	- the type of items to read (PETSC_INT, PETSC_DOUBLE or PETSC_SCALAR)

Output Parameters

p -the buffer

Notes

PetscBinaryRead() uses byte swapping to work on all machines; the files are written to file ALWAYS using big-endian ordering. On small-endian machines the numbers are converted to the small-endian format when they are read in from the file. Integers are stored on the file as 32 bits long, regardless of whether they are stored in the machine as 32 bits or 64 bits, this means the same binary file may be read on any machine.

Examples