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From: kehs@east.alsys.com (David Kehs)
Subject: Re: Command line package for Alsys Ada Compiler
Message-ID: <CyLMHM.J6z@alsys.com>
Sender: news@alsys.com
Organization: Alsys Inc, Burlington, MA, USA
References: <CyHwxD.82r@oodis01.hill.af.mil>
Date: Tue, 1 Nov 1994 17:12:57 GMT
Date: 1994-11-01T17:12:57+00:00
List-Id: <comp.lang.ada>

In <CyHwxD.82r@oodis01.hill.af.mil> nelsonb@oodis01.hill.af.mil (Contractor Bert Nelson) writes:

>Does the Alsys Ada compiler have a package that will allow programs
>to use command line arguments?

>What is it called?

>Does someone have an example using this Alsys package?

Yes, there is a package called SYSTEM_ENVIRONMENT, which has the declarations:

   function ARG_COUNT return POSITIVE;
   -- returns the number of arguments on the command line of the program,
   -- with the name of the program being invoked counting as one argument.

   function ARG_VALUE (INDEX : in NATURAL) return STRING;
   -- returns the INDEXth argument on the command line of the program
   -- If INDEX is larger than ARG_COUNT-1 then the function will raise
   -- the exception ILLEGAL_ARG_INDEX.
 
>On one project the government is considering moving from the current
>AT&T Unix box with a Verdix compiler to an HP9000 with an Alsys compiler.
>Throughout the programs the Verdix package COMMAND_LINE has been used and
>would have to be changed to use the Alsys package that handles command
>line arguments or call another package that has the same functionality.

You could also use the POSIX package POSIX_PROCESS_ENVIRONMENT to
achieve greater portability.

Dave Kehs
Alsys Inc