"any text" is probably not might not be possible.
If it is a point file, typically you will have an ID, x, y at a minimum. You would also need to know whether they are geographic coords (e.g. longitude, latitude for x/y) or in a projected system, and for them to match up you would need to have this information included in some part of the process.
A line would have a series of coordinates. A polygon would be the same, but with the start and stop point the same. You may want to look at wiki.gis.com and some of the definitions of what type of information is needed for data....maybe in the dictionary tab. It would most likely explain the different types better than I did.
So the question is, do you have a way to pull the information you will need to build data from the "any text" file if there is no known formatting of this information?
This could be, yes....but there would most likely need to be some type of pattern to the data.
What language are you using for the utility? What ArcGIS software are you using??
fyi - the shapefile, although older, would probably be the easiest datatype to create if not using either of the above. I think there are open-source libraries for creating those.
