castep_outputs.bin_parsers.fortran_bin_parser

General parser for the Fortran Unformatted file format.

Functions

binary_file_reader(file)

Yield the elements of a Fortran unformatted file.

castep_outputs.bin_parsers.fortran_bin_parser.binary_file_reader(file)

Yield the elements of a Fortran unformatted file.

Parameters:

• file (BinaryIO) – Open file to get binary data from.

• bool (int |) – Skip/rewind amount (True == -1).

Yields:

bytes – Binary data record from Fortran file.

Return type:

Generator[bytes, int, None]

Notes

Each “record” is:

(pre_nbytes: 4; data: nbytes; post_nbytes: 4)

Where pre_nbytes == post_nbytes (this is used in Fortran for rewinding).

So when we rewind, we rewind the current size + post_nbytes (current) + pre_nbytes (current) + post_nbytes (previous) [cursor now before post_nbytes (previous)] which is then read putting the cursor after post_nbytes (previous).

When we do the final rewind, we put the cursor before pre_nbytes ready to read the record.