petsc-3.7.7 2017-09-25

PetscBinaryRead

Reads from a binary file.

Synopsis

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. When PETSc is ./configure with --with-64bit-indices the integers are written to the file as 64 bit integers, this means they can only be read back in when the option --with-64bit-indices is used.

Examples