Possibility to specify file format type while loading

DESCRIPTION

What does your feature request improve on? Please describe. Sometimes you'll find files, which are in defined format but don't use standard file format extension. It would be nice, if one can specifiy the file format type while loading.

Describe the solution you'd like Enable the possility to specify the file format type while loading, e.g. via load FILE -fileformat="CSV"

Additional context Add any other context or screenshots about the feature request here.

(Do not write below this line)

DEVS' SECTION

ANALYSIS

Needs a set of changes:

Change the interface of GenericFile* getFileByType(const std::string& filename); to accept an optional second parameter with the user-supplied file format extension, which is then used to filter for the correct implementation
Add all user-declared file extensions to the declared extensions within the used FileSystem instances (there are more than one)
Extend FileHeaderInfo FileAdapter::openFile(std::string _sFile, bool loadToCache, bool overrideTarget, int _nHeadline, const std::string& sTargetTable) to cope with the new parameter
Extend bool FileAdapter::saveFile(const std::string& sTable, std::string _sFileName, unsigned short nPrecision) and the called virtual function to cope with the new parameter
Add the parameter to the language files
Add the parameter to the documentation files

IMPLEMENTATION STEPS

(see also our Wiki for implementation guidelines)

Implement the necessary changes in a new branch created here on GitHub
Test your implementation

DOCUMENTATION STEPS

(see also our Wiki for further information)

Update the changes log
Add comments to your implementation
Add Doxygen documentation comments
Create or update the documentation articles (*.NHLP and *.NDB files, if needed)
Update the language strings (*.NLNG files, if needed)

PULL REQUEST

Create a pull request for your changes
Fill out the template
Assign @numere-org/maintainers as reviewers

numere-org / NumeRe