/undefined in Top

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2 total messages Started by L. Peter Deutsch Thu, 24 Dec 1992 03:18

#522

Author: L. Peter Deutsch
Date: Thu, 24 Dec 1992 03:18

28 lines
1527 bytes

Re <9212240258.AA01126@raisin-nut>
<1992Dec23.143858.29137@ramon.bgu.ac.il>:

> Here is the file I had problem with.
> Ghostscript wrote me :
> /undefined in Top

The problem is in this section of the file:

> /Top systemdict /languagelevel known  
> 		{systemdict /languagelevel get 2 eq}{false} ifelse { 
> 	currentpagedevice /PageSize get 1 get Margin sub 
>     } { 
> 	{statusdict /paperheight get} stopped {11.0 72 mul} if Margin sub 
>     } ifelse 
>     def 

If the file is not running in a Level 2 system, and statusdict does
not contain an entry for paperheight, the `get' on the 5th line will
cause an error.  When control returns to the `stopped', the o-stack
will still contain statusdict and /paperheight.  As a result, the
`def' winds up defining paperheight, not Top.

This is a bug in the file, not in Ghostscript.

L. Peter Deutsch :: Aladdin Enterprises :: P.O. box 60264, Palo Alto, CA 94306
ghost@aladdin.com, ...decwrl!aladdin!ghost ; voice 415-322-0103 ; fax 322-1734
	    "Implementation is the sincerest form of flattery."

Re: /undefined in Top

#528

Author: Ioffe Nicolay
Date: Fri, 25 Dec 1992 23:49

43 lines
1840 bytes

ghost@aladdin.COM (L. Peter Deutsch) writes:
: Re <9212240258.AA01126@raisin-nut>
: <1992Dec23.143858.29137@ramon.bgu.ac.il>:
: 
: > Here is the file I had problem with.
: > Ghostscript wrote me :
: > /undefined in Top
: 
: The problem is in this section of the file:
: 
: > /Top systemdict /languagelevel known
: > 		{systemdict /languagelevel get 2 eq}{false} ifelse {
: > 	currentpagedevice /PageSize get 1 get Margin sub
: >     } {
: > 	{statusdict /paperheight get} stopped {11.0 72 mul} if Margin sub
: >     } ifelse
: >     def
: 
: If the file is not running in a Level 2 system, and statusdict does
: not contain an entry for paperheight, the `get' on the 5th line will
: cause an error.  When control returns to the `stopped', the o-stack
: will still contain statusdict and /paperheight.  As a result, the
: `def' winds up defining paperheight, not Top.
: 
: This is a bug in the file, not in Ghostscript.
: 
: L. Peter Deutsch :: Aladdin Enterprises :: P.O. box 60264, Palo Alto, CA 94306
: ghost@aladdin.com, ...decwrl!aladdin!ghost ; voice 415-322-0103 ; fax 322-1734
: 	    "Implementation is the sincerest form of flattery."
: 
: 
: 
: 



But why then it passes /Right ?

There file uses /paperwidth!

And why it works then if I put all these deffinitions in gs_statd.ps?

Nick

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