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-
- Program: GETARGS
- Author: Steve Titterud
- Documentation: GETARGS.DOC (this file)
-
- This is a little subroutine which might be used at the front end of
- an Xywrite 3 program. It is, of course, subject to modification in
- any degree the user might wish.
-
- The basic purpose of this subroutine is to parse the argument passed
- with a RUN command, break it into sub-arguments at the boundaries of
- delimiters, enabling the user to enter a program with, say, 10 or 15
- arguments instead of 1, for further use in the program.
-
- The syntax is: RUN progname arg1[]arg2[]arg3[]arg4[].....argn[]
-
- where []=delimiter specified by user in GETARGS.
-
- In the form uploaded, the delimiter is specified as a comma (,) - this
- can be found in the se /,/ command. Put anyone you like in there; just
- make sure you won't use the delimiter within the arguments you intend to
- pass!! The number and size of the arguments you will be able to pass to
- the program depends on the resulting length of the command line. I don't
- generally use a large number nor very large strings. Experiment around
- and see what you can get away with. I can't seem to get more than 70
- characters on a command line, including delimiters, no matter what I do.
- Of course, if your arguments were small, you can store more than the 15
- which getargs stores.
-
- The program opens window #9, inserts the argument, then parses it, breaking
- it into subarguments. Each subargument is captured to ALT-z, then assigned
- to a numbered variable from 001 to 015, which are then available to your
- program. I show that here by simply aborting the display of the entire
- argument and inserting each subargument on its own line with the PV command,
- in a new file, showargs. Note that the last subargument in the list must be
- terminated with the delimiter also. Note also that if you have an ALT-z
- macro loaded, it will be overwritten.
-
- This will 'save' null variables in the order of 001-015, too - for example:
-
- RUN getargs MN,IA,,,,WI,,IL,,,CA,,,OR,WA,
-
- You may well want to have your program detect a null variable and branch
- accordingly - getargs doesn't do this, as it is intended to demonstrate that
- the argument passed with the RUN command can be broken down into subarguments,
- each of which can be treated as a field for a certain type of value expected
- to be initialized by this subroutine for further use in the main program.
-
- I hope you find this idea useful at some point in time.
-
- End of getargs.doc.