Common utilities for NeXus file handling. More...

Enumerations
enum class	HDFType { HDF4 , HDF5 , Unknown }
	Enumeration of supported HDF file types. More...

Functions
HDFType	checkHDFType (const std::string &filename)
	Determine the HDF format type of a file by reading its header.

std::string	getIso8601TimestampLocal ()
	get the current time and return it as na IOS8601 time stamp.

Detailed Description

Common utilities for NeXus file handling.

The nxs namespace provides utility functions that are common to both HDF4 and HDF5 implementations. This includes file type detection and shared enumerations.

See also: nxH4 for HDF4-specific implementation; nxH5 for HDF5-specific implementation

Enumeration Type Documentation

◆ HDFType

enum class nxs::HDFType

strong

Enumeration of supported HDF file types.

Used to identify whether a file is HDF4, HDF5, or of unknown format. This is determined by reading the file's magic bytes header.

Enumerator
HDF4	HDF4 format (magic: 0x0e 0x03 0x13 0x01)
HDF5	HDF5 format (magic: 0x89 'H' 'D' 'F' 0x0d 0x0a 0x1a 0x0a)
Unknown	Unrecognized file format.

Examples: /workspace/LMU/musrfit/src/external/nexus/PNeXus.h.

Definition at line 141 of file PNeXus.h.

Function Documentation

◆ checkHDFType()

nxs::HDFType nxs::checkHDFType ( const std::string & filename )

Determine the HDF format type of a file by reading its header.

Opens the file in binary mode and reads the first 8 bytes to compare against known HDF4 and HDF5 magic byte signatures. This allows automatic format detection before attempting to open the file with the appropriate library.

Parameters

filename Path to the file to check