Moves the file pointer on a PETSc binary file.
PetscErrorCode PetscBinarySynchronizedSeek(MPI_Comm comm,int fd,off_t off,PetscBinarySeekType whence,off_t *offset)
|fd ||- the file
|whence ||- if PETSC_BINARY_SEEK_SET then size is an absolute location in the file
if PETSC_BINARY_SEEK_CUR then size is offset from current location
if PETSC_BINARY_SEEK_END then size is offset from end of file
|off ||- number of bytes to move. Use PETSC_BINARY_INT_SIZE, PETSC_BINARY_SCALAR_SIZE,
etc. in your calculation rather than sizeof() to compute byte lengths.
offset -new offset in file
Integers are stored on the file as 32 long, regardless of whether
they are stored in the machine as 32 or 64, this means the same
binary file may be read on any machine. Hence you CANNOT use sizeof()
to determine the offset or location.
PetscBinaryRead(), PetscBinaryWrite(), PetscBinaryOpen(), PetscBinarySynchronizedWrite(), PetscBinarySynchronizedRead(),
Index of all Sys routines
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