Gpc

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Re: GNU Pascal
by Peter Gerwinski 29 Jun '97

29 Jun '97

According to mtdew: > > Hi, Im very excited about using your GPC for programming some IRC > interfaceses (server and client) However, Im new to using GPC (not new to > borland pascal) and have been finding it difficult to find information on > commands/functions/procs that are specific to GPC. Indeed, our documentation is somehow outdated and incomplete. A lot of requests for extensions of GPC arise from the fact that nobody knows how to use the existing features. Sorry for that. If you want to help us to improve the GPC documentation, be welcome! (-: > I'm very interested in any information about opening sockets, so > that I can use them to connect with other irc servers.. (Or maybe even > just other servers of any sort of port) Is there support for this? > (Something similar to C's, 'socket'?) I don't know much about sockets (would like to know, however), but the GPC FAQ describes how to use arbitrary C libraries from GNU Pascal: 8< ---- begin (* FAQ extract *) ------------------------------------------ How do I use <insert_your_function_here> from the C library? ============================================================ GNU Pascal can use every function of your C library, but it may be up to you to write declaration of an external function, before you can use it. Consider the function `sleep'. `man(3) sleep' reveals: --------------------------------------------------------- NAME sleep - Sleep for the specified number of seconds SYNOPSIS #include <unistd.h> unsigned int sleep(unsigned int seconds); --------------------------------------------------------- This small demo program shows how to use `sleep' in a Pascal program: --------------------------------------------------------- program SleepDemo; type word = __unsigned__ integer; function sleep(seconds: word): word; C; var result : word; begin result := sleep(10); end. ---------------------------------------------------------- 8< ---- end (* FAQ extract *) -------------------------------------------- If you write a GPC Unit (or Module) to access sockets and such, be welcome to give us a copy we can publish with GPC. Hope this helps, Peter Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer peter.gerwinski(a)uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201] maintainer GNU Pascal [970624] - http://home.pages.de/~gnu-pascal/ [970125]

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GNU Pascal
by mtdew 29 Jun '97

29 Jun '97

Hi, Im very excited about using your GPC for programming some IRC interfaceses (server and client) However, Im new to using GPC (not new to borland pascal) and have been finding it difficult to find information on commands/functions/procs that are specific to GPC. I'm very interested in any information about opening sockets, so that I can use them to connect with other irc servers.. (Or maybe even just other servers of any sort of port) Is there support for this? (Something similar to C's, 'socket'?) Please mail me back with any information you may have on this! Thank You Donald Newberry desync(a)eskimo.com

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Info files problem..
by Kevin A. Foss 28 Jun '97

28 Jun '97

Hiya, I downloaded the new EMX binaries of gpc (970624) and find that I can't get the info files to display: "info -f gpc.inf" yields: info: Cannot find the node "Top". "info -f gpc.i1" shows the menu for the gpc info files but it doesn't find the nodes in the the other gpc.i? files. I know this problem cropped up before, but I couldn't find in a quick fix (that worked) in the archives. -Kevin -- Kevin A. Foss --- kfoss(a)mint.net --

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Re: Severe bug! :-(And some more bugs.)
by Peter Gerwinski 28 Jun '97

28 Jun '97

According to Frank Heckenbach: > > The following program causes an internal compiler error (Linux) or > causes gpc to crash with page fault (DJGPP), sometimes it hangs. Fixed. > Is "Integer(n)" supposed to support bigger types than LongestInt? No. Somebody else may implement that ... ;-) > If not, gpc should give an error if n is too big, It does so, now. > The following program writes 0. ("+" doesn't seem to work correctly with > big integers at all, telling from the asm code.) > > program x; > var a:integer(128); > begin > a:=$FFFFFFFF; > a:=a+1; > writeln(integer(a)) > end. This is correct: "a + 1" gets the integer value $100000000 in this example; the cast to `Integer' yields an (uncatched)-: overflow and the correct value 0 for the lowest 32 bits. > The following program writes "garbage": > > var x:cardinal(8); > begin > x:=31; > writeln(x); > end. `x' gets the correct value, but writeln barfs on `cardinal(8)' types. Working on it. > With this one, gpc says "initializer element is not constant": > > program x; > var a:integer(128) value 0; > begin > end. This was connected with the undetected overflow. (The maximal integer types have 64 bits on the PC). > At least "=" seems to work with these types, which would make "Cardinal(128)" > usable for ClassIDs (I hope)... :-) Sorry to have it taken out again! ;-) > Also, the n in "Integer(n)" seems to be handled modulo 256. > If types >256 bits are not supported, an error should be given. It is now. > Besides, I'm not too sure if "Integer(0)" is reasonable... ;-) It's also catched now. > And now for something completely different... > [...] Working on that. > But apart from these things, a lot of bugs have disappeared! :-) :-) Fein! That's what I hoped for. Thanks for the bug report, and I am glad that there were not much more bugs. This give hope that gpc-2.1 can be released within the next months. Tschuess, Peter Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer peter.gerwinski(a)uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201] maintainer GNU Pascal [970624] - http://home.pages.de/~gnu-pascal/ [970125]

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Unsubscribe
by Jonas Ingi Ragnarsson 27 Jun '97

27 Jun '97

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Severe bug! :-(And some more bugs.) (Was: GNU Pascal beta version gpc-970624)
by Frank Heckenbach 27 Jun '97

27 Jun '97

As you probably expected, the new "Integer(n)" types have some bugs left, among them a really bad one: The following program causes an internal compiler error (Linux) or causes gpc to crash with page fault (DJGPP), sometimes it hangs. It did even manage to hang Linux, when running in DosEmu!!! That's not easy! )-: unit x; interface type Card8=Cardinal(8); implementation end. Some more bugs with "Integer/Card/Word(n)": Is "Integer(n)" supposed to support bigger types than LongestInt? If not, gpc should give an error if n is too big, otherwise the following things are bugs. The following program writes 0. ("+" doesn't seem to work correctly with big integers at all, telling from the asm code.) program x; var a:integer(128); begin a:=$FFFFFFFF; a:=a+1; writeln(integer(a)) end. The following program writes "garbage": var x:cardinal(8); begin x:=31; writeln(x); end. With this one, gpc says "initializer element is not constant": program x; var a:integer(128) value 0; begin end. At least "=" seems to work with these types, which would make "Cardinal(128)" usable for ClassIDs (I hope)... :-) Also, the n in "Integer(n)" seems to be handled modulo 256. If types >256 bits are not supported, an error should be given. Besides, I'm not too sure if "Integer(0)" is reasonable... ;-) And now for something completely different... Peter Gerwinski wrote: > A new option `--executable-file-name' or (*$executable-file-name="foo"*) Doesn't work if no "program name;" is given, i.e. x.p with "program y;" results in x, but x.p without any "program" results in a.out. > * Subrange types can be packed now: Works "strangely" in some situations. The following gives 8, but replacing "packed 1..6" by "byte" yields 2 (the program with a packed record gives 1, as it should, however). program x; var z:record a:packed 1..6; b:packed 1..6 end; begin writeln(sizeof(z)) end. The following writes "xb" (I'm not completely sure how arrays of char are handled in EP, but I'd expect either "x" or "xbc"): program x; Var x:array[0..64] of Char; Begin x:='abc'; x:='x'; writeln(x) End. But apart from these things, a lot of bugs have disappeared! :-) -- Frank Heckenbach, Erlangen, Germany heckenb(a)mi.uni-erlangen.de http://www.mi.uni-erlangen.de/~heckenb/links.htm

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New WIN32 binaries uploaded
by Jan-Jaap van der Heijden 25 Jun '97

25 Jun '97

Hello, A new GPC binary distribution, corresponding to GPC-970624 (2.1-beta1) for cygwin32-b18 has been uploaded to: ftp://agnes.dida.physik.uni-essen.de/home/janjaap/cygwin32 The file to get is: gpc-970624.i386-cygwin32-b18.zip I included the corresponding tools (cygwin.dll, as, ld etc.) and documentation in windows .HLP files. NEWS: 1) You can now build DLL's with GPC. A sample is included. 2) The broken examples work again. GPC related notes: 1) The "winapi" macro is not in the compiler (yet) so you still have to {$define WINAPI(X) asmname X; attribute(stdcall)} 2) "function attributes" get lost in the GPI machanism, so you cannot export them from a unit (or DLL) Cygwin32 related problems: 1) On win95, building a DLL may not work because of garbage in the DLL. A solution (don't laugh!) : defrag the disk and make sure the option "wipe empty diskspace" is checked. 2) Linking against kernel32 *twice* will result in segfaulting apps. the previous alpha-gpc's demos suffered from this. 3) Linking GUI apps gives a harmless message: ld: warning: cannot find entry symbol _WinMainCRTStartup; defaulting to 00401000 There's an `ld' option to suppress this, but I have forgotten it. Things to come: 1) Build the RTS as a DLL --> smaller applications. 2) Switch to mingw32 ?? The programs you build would be faster and not depend on cygwin.dll. 3) Start a web page to publish the latest developments. Happy hacking, JanJaap --- With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC1925.

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Hi There
by Bill Currie 25 Jun '97

25 Jun '97

Just a few questions: Is this the list for general discussion of gpc? How do I subscribe? Is there a faq? (other than the djgpp faq) TIA Bill -- Leave others their otherness. -- Leave others their otherness.

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Re: Hi There
by Peter Gerwinski 25 Jun '97

25 Jun '97

According to Bill Currie: > > Is this the list for general discussion of gpc? Yes. > Is there a faq? (other than the djgpp faq) Yes: http://home.pages.de/~GNU-Pascal/gpc-faq.html ftp://kampi.hut.fi/jtv/gnu-pascal/FAQ > How do I subscribe? That's in the FAQ: Write e-mail to gpc-request(a)hut.fi. Hope this helps, Peter Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer peter.gerwinski(a)uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201] maintainer GNU Pascal [970510] - http://home.pages.de/~gnu-pascal/ [970125]

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Re: Word types...
by Frank Heckenbach 24 Jun '97

24 Jun '97

Christian Wendt wrote: > :-) > you could start BP IDE, type COMP and hit Strg-F1 ... :-) > In BP Comp is a FPU Type - it uses the FPU... Yes, I know that, but neither the online help nor the manuals (now I did look it up) say something about the name "Comp"... > (i think technically it's a > 73 Bit BCD packed integer; -> 18 (decimal) Digits + sign ) No, it's a signed 64 bit integer. It's just handled by the FPU, therefore BP handles it as a real type (a dubious decision, IMHO)... -- Frank Heckenbach, Erlangen, Germany heckenb(a)mi.uni-erlangen.de Turbo Pascal: http://www.mi.uni-erlangen.de/~heckenb/programs.htm Internet links: http://www.mi.uni-erlangen.de/~heckenb/links.htm

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