grantk@manta.NOSC.MIL (Kelly J. Grant) (02/03/90)
I'm not a serious hacker, but I have written a pretty good amount of PostScript code....and I swear I had three other people carefully look over what I did. I was using the Circular Text, program 10, page 167 of the blue book. I checked every single line against the book, but got nothing but blank page. My setup is such that I cannot watch the program run or get error status. Does anyone know if an errata list (sp?) exists for the Adobe series ? (Thanks) show Kelly grantk@manta.nosc.mil (619)225-8401 -- Kelly Grant grantk@manta.nosc.mil (619) 225-8401 Computer Sciences Corp ^^^^^^^^ Important: manta.UUCP won't get to me 4045 Hancock Street "If you are given lemons.....see if you can trade for San Diego, CA 92110 chocolate" - me
grantk@manta.NOSC.MIL (Kelly J. Grant) (02/03/90)
In article <1006@manta.NOSC.MIL>, grantk@manta.NOSC.MIL (Kelly J. Grant) writes:
I found the problem. In the process of displaying the text, the
'outsidecircletext' does a 'forall' loop through the input string.
It gets each character AS AN 'int' type in the body of the procedure!
It then must send each character to the procedure that actually
places the date on the page. The lower procedure is expecting an
argument of type 'string', as it is doing some calculations followed
by a 'show' of the stack argument. The bug is in the 'outsidecircletext'
line that follows:
() dup 0 charcode put outsideplacechar
This is the effect of this line (as I understand it :-)
A blank string is put on the stack
It is duplicated
'charcode' is 'put' at position 0 of the first string.
The problem is, 'put' doesn't leave anything on the stack! The
originally blank string is modified, but this isn't saved into
anything, and is subsequently lost. The only thing on the stack
after 'put' is the original blank string.
Here is my fix:
/s 2 string def %% possibly unnessary, but like I said, I'm not good
s 0 charcode put %% don't understand why a 'def' isn't necessary here
s outsideplacechar
It may just be dumb luck, but it works now.
Anyway, thanks for listening.
Kelly
--
Kelly Grant grantk@manta.nosc.mil (619) 225-8401
Computer Sciences Corp ^^^^^^^^ Important: manta.UUCP won't get to me
4045 Hancock Street "If you are given lemons.....see if you can trade for
San Diego, CA 92110 chocolate" - mejeynes@adobe.COM (Ross A. Jeynes) (02/03/90)
In article <1006@manta.NOSC.MIL> grantk@manta.NOSC.MIL (Kelly J. Grant) writes: >what I did. I was using the Circular Text, program >10, page 167 of the blue book. I checked every >single line against the book, but got nothing but >blank page. My setup is such that I cannot watch There is a pretty common mistake that people make when typing in this program. Because the text is Helvetica (i.e. a proportional font), the following line is often mis-typed since the space character isn't as wide as the other characters: () dup 0 charcode put outsideplacechar should really be: ( ) dup 0 charcode put outsideplacechar % (^add space here) There's another line further down in the program that needs to be changed in a similar manner. The reason this bombs is that the put operator is trying to put a value into a string which has no storage associated with it. Good luck... Ross Jeynes Developer Support jeynes@adobe.com Adobe Systems Incorporated {sun|decwrl}!adobe!jeynes
woody@rpp386.cactus.org (Woodrow Baker) (02/04/90)
In article <1006@manta.NOSC.MIL>, grantk@manta.NOSC.MIL (Kelly J. Grant) writes: I have used that piece of code for years. I think that the problem is with the font used to set the blue book. I had real fits with some of the code there. Specifically, there is a line that reads ()dup 0 charcode put.... OR SO IT SEEMS, when you look at it in the blue book. It is realy ( ) dup 0 charcode put... NOTE, THERE IS A SPACE between the ()! It is not apparent in the blue book. Cheers Woody > (Thanks) show > > Kelly > grantk@manta.nosc.mil (619)225-8401 > -- > Kelly Grant grantk@manta.nosc.mil (619) 225-8401 > Computer Sciences Corp ^^^^^^^^ Important: manta.UUCP won't get to me > 4045 Hancock Street "If you are given lemons.....see if you can trade for > San Diego, CA 92110 chocolate" - me
kaz@nanovx.UUCP (Mike Kazmierczak) (02/06/90)
>In article <1006@manta.NOSC.MIL>, grantk@manta.NOSC.MIL (Kelly J. Grant) writes: >The bug is in the 'outsidecircletext' >line that follows: > > () dup 0 charcode put outsideplacechar I found the same thing. If one subsitutes ( ) instead of () then it works. The space isn't real clear in the original text. Mike Kazmierczak -- X Systems -- INTERNET: kaz%nanovx.UUCP@gatech.edu UUCP: gatech!nanovx!kaz
cplai@daisy.UUCP (Chung-Pang Lai) (02/06/90)
In article <1006@manta.NOSC.MIL> grantk@manta.NOSC.MIL (Kelly J. Grant) writes: >I'm not a serious hacker, but I have written >a pretty good amount of PostScript code....and >I swear I had three other people carefully look over >what I did. I was using the Circular Text, program >10, page 167 of the blue book. I checked every >single line against the book, but got nothing but >blank page. I remember this problem showed up in this newsgroup quite awhile back. The error is in one of the space. I believe it is () vs. ( ) that causes the code to abort. Try put in the space or take out the space, I don't remember which. Adobe was brain damaged to publish code listings in variable spaced font.
hascall@cs.iastate.edu (John Hascall) (02/06/90)
In article <1744@adobe.UUCP> jeynes@adobe.UUCP (Ross A. Jeynes) writes: }In article <1006@manta.NOSC.MIL> grantk@manta.NOSC.MIL (Kelly J. Grant) writes: }>what I did. I was using the Circular Text,... }There is a pretty common mistake that people make when typing in this }program. Because the text is Helvetica (i.e. a proportional font), the }following line is often mis-typed since the space character isn't as wide }as the other characters: } () dup 0 charcode put outsideplacechar }should really be: } ( ) dup 0 charcode put outsideplacechar }% (^add space here) Ah yes, that one took my a while to find too.... I pencilled (penciled?) in a ? in our copy to spare anyone else the trouble... (?) dup 0 charcode .... since it doesn't really matter what character you stick in there as it is only a placeholder (IMHO this is something the author should have done in the first place). Why do people use proportional fonts for programs in books and documentation!!! In a "previous life" I worked for "User Services" and we always printed the examples/code in a fixed width font because there are a lot of people out there who get upset if they can't type it in EXACTLY like they see it. John Hascall