PetscBinaryRead
Reads from a binary file.
Synopsis
int PetscBinaryRead(int fd,void *p,int 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 or PETSC_SCALAR)
|
Output Parameters
p -the buffer
Options Database
-binary_longints -indicates the file was generated on a Cray vector
machine (not the T3E/D) and the ints are stored as 64 bit
quantities, otherwise they are stored as 32 bit
Notes
PetscBinaryRead() uses byte swapping to work on all machines.
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.
Note that Cray C90 and similar machines cannot generate files with
32 bit integers; use the flag -binary_longints to read files from the
C90 on non-C90 machines. Cray T3E/T3D are the same as other Unix
machines, not the same as the C90.
Keywords
binary, input, read
See Also
PetscBinaryWrite(), PetscBinaryOpen(), PetscBinaryClose()
Level:developer
Location:src/sys/src/fileio/sysio.c
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