Module fortran 

Fortran unformatted file format module

Provides functionality for reading and writing Fortran unformatted files:

• Sequential, direct, and stream access modes
• Support for different endianness and record marker sizes
• Automatic format detection
• Arrays stored in column-major order (Fortran convention)
• Support for all common Fortran data types Fortran unformatted file handling module

This module provides functionality for reading and writing Fortran unformatted files, which are commonly used in scientific computing, particularly in computational physics, weather modeling, and engineering applications.

Fortran Unformatted File Format

Fortran unformatted files use a record-based structure where each record is delimited by a record marker that contains the byte count of the record. The format varies between compilers and platforms:

• Sequential access: Each record has a 4-byte (or 8-byte) marker before and after
• Direct access: Fixed-length records without markers
• Stream access: Continuous byte stream (Fortran 2003+)

Examples

use scirs2_io::fortran::{FortranFile, RecordType, EndianMode};
use scirs2_core::ndarray::Array2;

// Read a Fortran unformatted file
let mut file = FortranFile::open("data.unf")?;

// Read a 2D array of doubles
let array: Array2<f64> = file.read_array_2d(100, 50)?;

// Write to a new file
let mut out_file = FortranFile::create("output.unf")?;
out_file.write_array(&array)?;

Structs

FortranConfig

Configuration for reading/writing Fortran unformatted files

FortranFile

Fortran unformatted file reader/writer

Enums

AccessMode

Fortran file access mode

EndianMode

Endianness mode for Fortran files

FortranType

Fortran data types

RecordMarkerSize

Record marker size for Fortran unformatted files

RecordType

Type of record in a Fortran file

Functions

detect_fortran_format

Detect the endianness and record marker size of a Fortran file

read_fortran_file

Read a complete Fortran unformatted file into memory