Gpc December 1996

gpc@gnu.de

8 participants
13 discussions

I have a small Problem with GPC
by Spansh 04 Dec '96

04 Dec '96

Well after being advised to download GPC as a 32bit compiler I tired I have in the last few days Downloaded these files GPC-1_1-.TAR.GZIP These had i486 somewhere I have three different versions of this file. GPC112b.ZIP This was 730k and does not seem to want to compile any of my programs giving me an error after the first line in my program. (parse error Ithink) GPC272b.ZIP a 1.0Mbyte file that I had to download twice as one of the files I downloaded was a bad zip (It was from Sunsite.Doc.Ic.AC.UK) and This gives me quite a few errors if I compile with the -c option. It says nothing just accesses the disk a lot If I use no options. Do I need any other files to be able to use GPC. I own a Pentium 60Mhzwith 8Mb ram. I currently use Turbo Pascal Verion 6.00. Could you help me out please. If it gave me errors about sytnax then I would be ok. But it does not like the type 'Word' I have a variable called Lookup which is an array of Word along with a few other variables that are words. I assume this is something I am doing wrong as Word is a basic type I would have thought. I even tried changing them to SWord (Single Word) and That did not help. I seem to remember reading somewhere that I need GCC to be able to compile with this. Is this true and Which version do I need. Thanks for any help you could give me. I hope that you can help as I would like to have a full 32bit compiler. Gareth Harper AKA $ P @ /\/ $ ]-[ ------------------------ Tel - 01642 550854 E-Mail - Gareth.Harper(a)Onyxnet.CO.UK Write - 16 Ganton Close, Billingham, Cleveland, TS22 5RE

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Re: getting environment variables
by Peter Gerwinski 01 Dec '96

01 Dec '96

According to David Wooff: > Greetings, fellow GPC users. Despite trying the solutions suggested in the > faq (http://agnes.dida.physik.uni-essen.de/~gnu-pascal/faq.html), I'm no > nearer to getting an environment variable successfully into my program. > For example, suppose I want to get the PATH environment variable into > the program as a string that I can then work on? That's strange. When I try the program `EnvDemo' from the FAQ, it works fine on my Linux box. (The code I used is appended below just to make sure that we are speaking about the same program.) I suggest the following strategy to hunt the bug: * Control all intermediate results, e.g. p^ in StrPCopy and Src^ in StrPas. * Use the C `puts' output routine to check C strings: Procedure Puts ( S: CString ); C; ... Puts ( pName ); Puts ( GetEnv ( pName ) ); BTW, thanks a lot for the GPC success story. Things like this encourage us to go on and fix the remaining bugs (e.g. `substr'). :-) :-) Peter e-mail: peter.gerwinski(a)uni-essen.de home address: D\"usseldorfer Str. 35, 45145 Essen, Germany WWW: http://agnes.dida.physik.uni-essen.de/~peter/ 8< ---------------------------------------------------------------------------- Program EnvDemo; type word = __unsigned__ integer; TString = string(256); { Pascal string schema } CString = __cstring__; { C style string } { Convert a "C" string to a "Pascal" string } function StrPas(Src: CString): TString; var S : TString; begin S := ''; if (Src <> NIL) then while ( (Src^ <> chr(0)) AND (length(S) < S.capacity)) do begin S := S + Src^; inc(Word(Src)); end; StrPas := S; end; { Convert a "Pascal" string to a "C" string } function StrPCopy(Dest: CString; Src: String): CString; var c: integer; p : CString; begin p := Dest; for c:=1 to length(Src) do begin p^ := Src[c]; inc(word(p)); end; p^ := chr(0); StrPCopy := Dest; end; { C library function prototype: char *getenv(const char *name); } function GetEnv(name : CString): CString; C; var pName: CString; begin getmem(pName, 256); pName := StrPCopy(pName, 'PATH'); writeln('Your PATH is: ', StrPas(GetEnv(pName))); freemem(pName, 256); end.

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getting environment variables
by D.A.Wooff＠durham.ac.uk 01 Dec '96

01 Dec '96

Greetings, fellow GPC users. Despite trying the solutions suggested in the faq (http://agnes.dida.physik.uni-essen.de/~gnu-pascal/faq.html), I'm no nearer to getting an environment variable successfully into my program. For example, suppose I want to get the PATH environment variable into the program as a string that I can then work on? Can anyone help? I know zero C, and I prefer my pascal as plain as possible; I don't use Borland extensions. By the way - developers thank you. I've used GPC to compile the [B/D] Bayes linear statistics package. It is about 28000 lines of dense (mostly uncommented: shame on me) code, which probably exploits every nook and cranny of the pascal language (e.g. it makes heavy use of height-balanced binary trees using record variants). The same code (after minor translations) also compiles under Borland Pascal, the Berkely unix compiler, and the SUN pascal compiler. We get the same answers for all our test routines, and the graphics implementation (hooking to Tcl/Tk) also works properly. I didn't expect GPC to do it, but (although it took a lot of time rewriting the code to avoid GPC bugs, such as substr) it does work. A linux version of [B/D] will be released as soon as I can get getenv() to work! David.

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Gpc December 1996