start@chief.UUCP (CompuInvest BBS system ) (02/24/89)
How does one set up a program to read in parameters from the command line?
Ex. :
Shell> pascal.prg -param1 -param2
^^^^^^ ^^^^^^
|||||| ||||||
How does one accomplish this in standard (ISO) Pascal, if it is even
possible? Or, if turbo Pascal will accomlish this, how?
I am using a Pascal compiler for my Amiga (Metacomco's MCC Pascal V2).
Any help, of course would be appreciated!
Thanks,
Robert Cooperfargo@pawl.rpi.edu (Ethan M. Young) (02/28/89)
In article <495@chief.UUCP> start@chief.UUCP (CompuInvest BBS system ) writes: > >How does one set up a program to read in parameters from the command line? > >Ex. : > >Shell> pascal.prg -param1 -param2 > ^^^^^^ ^^^^^^ > |||||| |||||| >How does one accomplish this in standard (ISO) Pascal, if it is even >possible? Or, if turbo Pascal will accomlish this, how? > In Turbo Pascal (at least 3.0), there are two variables called ParamCount and ParamStr. ParamCount is of type integer and contains the number of blank- separated parameters on the command line. ParamStr is an ARRAY of strings, each string being the appropriate parameter, starting at index 1 (It may be 0) If I remember correctly, standard Pascal has no method on reading in the com- mand line parameters. It is completely implementation specific. Thank you and happy hunting! Internet: fargo@pawl.rpi.edu ____ [> SB <] fargo@{paraguay|uruguay}.acm.rpi.edu /__ -=>??<=- Bitnet (??): usergac0@rpitsmts.bitnet / ARGO : 3000 years of regression from the year 4990
mikej@pyr1.acs.udel.EDU (Michael Jacobs) (02/28/89)
In article <772@rpi.edu> fargo@pawl.rpi.edu (Ethan M. Young) writes: >In article <495@chief.UUCP> start@chief.UUCP (CompuInvest BBS system ) writes: >>How does one set up a program to read in parameters from the command line? >>Shell> pascal.prg -param1 -param2 > >In Turbo Pascal (at least 3.0), there are two variables called ParamCount and >ParamStr. ParamCount is of type integer and contains the number of blank- >separated parameters on the command line. > >ParamStr is an ARRAY of strings, each string being the appropriate parameter, >starting at index 1 (It may be 0) It's not an array, it's a function. It makes a difference wether you use ()'s or []'s. The parameter of the ParamStr function is the ordinal number of the parameter you want. ParamStr(0) will return the name of the program you executed. Mike J, The Grey Sysop... | Ancient Spirits of Evil, transform this Temporal Hitchhiker | decayed form into Mumm-ra, the Ever Living! mikej@vax1.acs.udel.EDU |
abcscnuk@csuna.csun.edu (Naoto Kimura) (02/28/89)
In article <495@chief.UUCP> start@chief.UUCP (CompuInvest BBS system ) writes: > >How does one set up a program to read in parameters from the command line? > >Ex. : > >Shell> pascal.prg -param1 -param2 > ^^^^^^ ^^^^^^ > |||||| |||||| >How does one accomplish this in standard (ISO) Pascal, if it is even >possible? Or, if turbo Pascal will accomlish this, how? > >I am using a Pascal compiler for my Amiga (Metacomco's MCC Pascal V2). > >Any help, of course would be appreciated! > > >Thanks, > >Robert Cooper Hmmmm... I seem to remember such a similar query just a month ago... As far as I know, there is no standard way of doing so. There is still some hope, because many implementations of pascal will have ways to access the command line. Here are some implementations that I know of that allow access to the command line parameters: (VM/CMS) PASCAL/VS If I recall, R0 is used to point to the unparsed command line string. You had to write some assembly code to be able to gain access to it. There was also a way to gain access to the parsed arguments (though they were limited to 8 characters). (MS/PC-DOS) Turbo Pascal Use the ParamCount function to find out how many argument strings there were, and the ParamStr(n) function to get the n'th argument string. Version 5.0 allows you to use ParamStr(0) to get the fully qualified filename of the executable. You could probably also look somewhere in the PSP. (NOS) CDC Pascal There is an include file to access parts of the command line. You had to use either a function or procedure to obtain the value of a option. (Unix) Berkeley This compiler allows access to the argument count and argument strings via the 'argc' function and the 'argv' function. //-n-\\ Naoto Kimura _____---=======---_____ (abcscnuk@csuna.csun.edu) ====____\ /.. ..\ /____==== // ---\__O__/--- \\ Enterprise... Surrender or we'll \_\ /_/ send back your *&^$% tribbles !!
chan@valhalla.ee.rochester.edu (03/01/89)
To: abcscnuk@csuna.csun.edu
In-Reply-To: <1719@csuna.csun.edu>
References: <495@chief.UUCP>
!In article <495@chief.UUCP> start@chief.UUCP (CompuInvest BBS system ) writes:
!>
!>How does one set up a program to read in parameters from the command line?
!>
!>Ex. :
!>
!>Shell> pascal.prg -param1 -param2
!> ^^^^^^ ^^^^^^
!> |||||| ||||||
!>How does one accomplish this in standard (ISO) Pascal, if it is even
!>possible? Or, if turbo Pascal will accomlish this, how?
!>
!>I am using a Pascal compiler for my Amiga (Metacomco's MCC Pascal V2).
!>
!> Any help, of course would be appreciated!
!>
!>
!>Thanks,
!>
!>Robert Cooper
!
!Hmmmm... I seem to remember such a similar query just a month ago...
!
!As far as I know, there is no standard way of doing so. There is
!still some hope, because many implementations of pascal will have
!ways to access the command line.
!
!Here are some implementations that I know of that allow access to the
!command line parameters:
!
!(VM/CMS)
!PASCAL/VS If I recall, R0 is used to point to the unparsed command
! line string. You had to write some assembly code to
! be able to gain access to it. There was also a
! way to gain access to the parsed arguments (though they
! were limited to 8 characters).
!
If I am right, PARMS is a function with no argument in VSPASCAL
that will return command line arguments in the form of a string.
If you want to know more, I can look up the detail for you.
-dan.