July 2001 - Hugs-Users

toUpper Bug?
by Steinitz, Dominic J 28 Jul '01

28 Jul '01

Section 9 of the Library says that ``Function toUpper converts a letter to the corresponding upper-case letter, leaving any other character unchanged. Any Unicode letter which has an upper case equivalent is changed'' I would therefore expect map toUpper na\239fve to give NA\207VE (hopefully I've got the right values for the characters I intend). Hugs gives: Prelude> toUpper (chr 239) '\239' So I guess it doesn't work in Hugs. But it does work in ghc: Char> toUpper (chr 239) '\207' Char> Maybe if this one is going to be fixed, toUpper could be put in the correct library as well? Dominic. ------------------------------------------------------------------------------------------------- 21st century air travel http://www.britishairways.com

1 0

http://www.video2flash.com. Convert your videos into flash format!
by video2flash＠boldyonline.com 25 Jul '01

25 Jul '01

------------------------------------------------------------------------------- If you are not interested in video compressing we do appologize sending you this email. You can unsubscribe by clicking the following link: http://www.video2flash.com/cgi-bin/un.cgi?email=hugs-users@haskell.org ------------------------------------------------------------------------------- Hello there, We would like to inform you about the following: Troublesome web video transfers using plug-in and virus software are now history thanks to video2flash. Using the well proven technology of Flashplayer, we have designed a tool that enables you to transfer your video media with astounding simplicity. Our conversion tool offers you the opportunity to add value to your Internet services, TV advertisements, video banners, film previews, video clips, training tools, news channels, etc. Research reports from established institutions have shown that the time your website is visited is likely to be under 6 minutes. Ample time that you may use to show commercial messages formatted in video2flash. E.g. the average loading time for a 30 second add is no more than 1,5 minutes via a 56K modem. Check out the following site http://www.video2flash.com It's a webtool to convert videoclips into flash format. Check it out, use it and send me feedback on the functionality: info(a)video2flash.com Some features: No cure no pay Bandwidth selector Quality of picture selector. Movie dimensions selector. Automatic calculated preloader. Build in Variable to build progress bar 100% sync of sound / picture Multiple screen formats. Can convert plain AVI and quicktime (*.mov) (we only want high quality movies, NO asf or other windows media formats) No special hardware required. We handle all of the processing. Notification by email. No 'windows' lockups. No Headache. A 100% service Batch processing. Can handle gigs of movies at one time. Overview of your converted movies. Send movies by ftp or e-mail. Thanks in advance I've send you this mail because i think you might be interested in our service. This is NO spam. To remove yourself from our list click the following link: http://www.video2flash.com/cgi-bin/un.cgi?email=hugs-users@haskell.org If interested please visit our site: http://www.video2flash.com ========================================================== This email message is intended only for the addressee(s) and contains information which may be confidential and/or copyright. If you are not the intended recipient please do not read, save, forward, disclose, or copy the contents of this email. If this email has been sent to you in error, please delete this email and any copies or links to this email completely and immediately from your system. No representation is made that this email is free of viruses. Virus scanning is recommended and is the responsibility of the recipient. ==========================================================

1 0

Hugs & Cygwin
by Andre W B Furtado 24 Jul '01

24 Jul '01

Hello there. I am trying to install (compile the source of) Hugs-feb-2001 under Windows98, via Cygwin, but I got the message: mv: cannot move `hugs' to `/bin/#inst.7520#': No such file or directory make: *** [install_bin] Error 1 I tried to change the "--prefix" option in the ./configure step to a lot of diferent directories (rather than $HOME), but it didn't work. Can anyone help me? Thanks a lot, Andre W B Furtado

1 0

Succesfull compile of Hugs on Mac OS X
by Jorge Salvador Caffarena 24 Jul '01

24 Jul '01

Hello, I write just to tell you that I succesfully compiled and got running Hugs on my Mac OS X system. I compiled the UNIX binaries following the short instructions and they worked like a charm with no problem. Just in case you don't know it works in Mac OS X as well. Jorge Salvador Caffarena http://homepage.mac.com/eevyl/

3 2

compiling parser.c
by Richard Backhouse 19 Jul '01

19 Jul '01

hi, i'm working with the Hugs source but i can't compile parser.c. Do I need to have/do something to make this compile. I'm using gcc. Thanks for any help you can give. Richard

2 1

ForeignObj Finalizer in Hugs
by KAKIHARA Norihiro 02 Jul '01

02 Jul '01

I want to use ForeignObj for large transient data, but Hugs ForeignObj implementation is quite mysterious... Three ForeignObj interfaces are described as such in exts/Foreign.hs. primitive makeForeignObj :: Addr{-x-} -> Addr{-free-} -> IO ForeignObj primitive writeForeignObj :: ForeignObj -> Addr -> IO () primitive eqForeignObj :: ForeignObj -> ForeignObj -> Bool The latter argument of makeForeignObj is a mystery. 1. I thought it is a pointer of function (with type of [void (*)(void *);] ?). foreign import "foo" "newFO" newFO :: IO Addr foreign import "foo" "delFO" delFO :: Addr -> IO () primitive unsafeCoerce "primUnsafeCoerce" :: a -> b newFO >>= (\fo -> makeForeignObj fo (unsafeCoerce delFO)) This code causes an unexpected signal (probably the implementation of Addr -> IO () is different from C form). 2. `foreign label' is valid? foreign import "foo" "newFO" newFO :: IO Addr foreign label "foo" "delFO" delFO :: Addr newFO >>= (\fo -> makeForeignObj fo delFO) No, it isn't. 3. Then I try to get the pointer of delFO directly (Fortunately lcc-win32 3.1 allows internal global variables viewable, however, I suppose other C compilers do not...). foreign import "foo" "newFO" newFO :: IO Addr foreign import "foo" "delFO" delFO :: Addr -> IO () foreign import "foo" "getDelFO" getDelFO :: IO Addr getDelFO >>= (\del -> newFO >>= (\fo -> makeForeignObj fo del)) It works as expected. But I think such description is not appropriate! Variables in DLL are not always viewable by another program. How I should use ForeignObj finalizer in Hugs? -- KAKIHARA Norihiro [The following code was workable in my environment...] ********** main.c ********** #include <windows.h> #include <stdio.h> BOOL WINAPI LibMain(HINSTANCE hInstance, DWORD fdwReason, LPVOID lpReserved) { return TRUE; } extern int *newObj(void) { int *i; i = (int*)malloc(sizeof(int)); *i = 5; printf("CREATED %d\n", *i); return i; } static void delObj(int *i) { printf("DELETED %d\n", *i); free(i); } extern void *getDelObj(void) { return (void*)delObj; } ******** foreignObj.hs ********** import Foreign foreign import "foreignObj" "newObj" newObj :: IO Addr foreign import "foreignObj" "getDelObj" getDelObj :: IO Addr test :: IO () test = getDelObj >>=(\del -> newObj >>= (\obj -> makeForeignObj obj del) >>= (\_ -> putStr "End Program"))

3 5