Re: Exporting a String
I am no expert in these things, but
as a matter of fact I just did some quite similar and found
the help in the mailing list archive. (at least I did not find
a cookbook for this in the documentation)
My Haskell module:
==
module Mini where
import CString
foreign export stdcall cAppend :: CString -> CString -> IO CString
cAppend :: CString -> CString -> IO CString
cAppend cxs cys
= do
xs <- peekCString cxs
ys <- peekCString cys
erg <- return (xs++ys)
newCString erg
And my C program Main.c calling this function:
==
#include
#include "Mini_stub.h"
#include "RtsAPI.h"
extern void __stginit_Mini ( void );
int main(void)
{
char* bogusFlags[1] = { "\0" };
char* test;
//starting up Haskell runtime
startupHaskell(0, bogusFlags, __stginit_Mini);
//calling Haskell function
test=cAppend("the world"," is my oyster");
//printing its result
printf("%s\n", test);
//say bye bye to Haskell
shutdownHaskell();
return 0;
}
and my way to build this thing:
===
ghc -fglasgow-exts -package text -c Mini.hs
gcc -I. -I'e:/Program Files/ghc/ghc-5.02/include' -I'E:\Program
Files\ghc\ghc-5.02\include\mingw' -c Main.c
ghc -fglasgow-exts -no-hs-main -package text -static Main.o Mini.o Mini_stub.o -o
Test.exe
Please some expert correct me, if this is not the right way to
do this.
Sven Eric
--
__
Sven Eric Panitz Uhlandstr. 12 D-64297 Darmstadt
Software AG [EMAIL PROTECTED] (+49)6151-92-1426
--- when I cannot sing my heart, I can only speak my mind ---
___
Glasgow-haskell-users mailing list
[EMAIL PROTECTED]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Why have file names with 3 components?
This looks like a bug, but please don't change it! If you have a file A.blah.hs containing a module A, ghc5.02 compiles it, producing A.hi and A.blah.o. I have an application for this, since I have just, for the first time, been reluctantly compelled to introduce recursive modules. Rather than writing .hi-boot files (which might have to be rewritten for ghc5.03) I have instead written .boot.hs files, which yield .hi files, which then get moved to .hi-boot. Thus a module A has two sources, the real source A.hs, but also the source for the .hi-boot file, A.boot.hs. ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
RE: Cash Prizes Win!
At 2001-09-27 03:48, Simon Marlow wrote: >I could turn on subscriber-only posting if there's a consensus to do >that. I vote for that. >It might be inconvenient in that you have to post from the same >account that you read Haskell mail from though, and I know some people >have separate email accounts just for receiving Haskell mail. I also run an email list using Mailman. Anytime a subscriber sends a message from a 'wrong' address, Mailman catches it, and I simply subscribe that address 'nomail', and approve the message. >Also, what do people think about the volume of Conference-related >announcements sent to the list ([EMAIL PROTECTED] in particular)? I'm not really bothered by the way it is... -- Ashley Yakeley, Seattle WA ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: More 5.02 downloads
> I've updated the 5.02 Windows InstallShield, getting rid of one or two > teething problems, and improving the availability of the docs. > > I've also added links to the RedHat 7.1 RPMs and FreeBSD/x86 binary > dist. > > http://www.haskell.org/ghc/download_ghc_502.html I'm not sure who to mention this to, but the mirror at http://www.mirror.ac.uk/sites/www.haskell.org/ghc/download_ghc_502.html> links to some dvi about the new runtime system instead of the base rpm! (It's preferable for me to download from a UK location) Jón -- Jón Fairbairn [EMAIL PROTECTED] 31 Chalmers Road [EMAIL PROTECTED] Cambridge CB1 3SZ+44 1223 570179 (after 14:00 only, please!) ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Exporting a String
hello,
Is there any way to export a value of type String?
I have tried it as follows
Haskell code
foreign export f::Int -> IO (StablePtr String)
f:: Int -> IO (StablePtr String)
f n = newStablePtr ("hola")
C code
char *cad;
cad=f(5);
printf("%s",cad);
but it does not go (segmentation fault).
Thanks in advance,
J. Ignacio García
___
Glasgow-haskell-users mailing list
[EMAIL PROTECTED]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: packages in ghci
> I just downloaded the nice installation of ghc 5.02 for windows. > > I have just some problem when trying to start ghci with a > package as described in the manual: > > > E:\hs\Quip>ghci -package text Works fine for me. > > e:\PROGRA~1\ghc\ghc-5.02\bin\ghc.exe: no input files > > Usage: For basic information, try the `--help' option. > > > > E:\hs\Quip> > > Adding a Haskell source file as further parameter does not really help: > > > E:\hs\Quip>ghci -package text M.hs > > A' does not existhc-5.02\bin\ghc.exe: file `= This looks as though there's some problem involving carriage returns, as the error seems to wrap from the end of the line back to the beginning. > Any idea, what I am doing wrong? Nope. What's your PATH like? What version of Windows are you using? -- http://sc3d.org/rrt/ | wit, n. educated insolence (Aristotle) ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
packages in ghci
I just downloaded the nice installation of ghc 5.02 for windows. I have just some problem when trying to start ghci with a package as described in the manual: > E:\hs\Quip>ghci -package text > e:\PROGRA~1\ghc\ghc-5.02\bin\ghc.exe: no input files > Usage: For basic information, try the `--help' option. > > E:\hs\Quip> Adding a Haskell source file as further parameter does not really help: > E:\hs\Quip>ghci -package text M.hs > A' does not existhc-5.02\bin\ghc.exe: file `= > > E:\hs\Quip> Any idea, what I am doing wrong? Sven Eric -- __ Sven Eric Panitz Uhlandstr. 12 D-64297 Darmstadt Software AG [EMAIL PROTECTED] (+49)6151-92-1426 --- when I cannot sing my heart, I can only speak my mind --- ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
RE: Cash Prizes Win!
[ Ketil Malde asks about recent spam on Haskell mailing lists... ] > How about disallowing non-subscribers from posting? This list is my > main source of spam these days. (Effective filtering is your friend) My apologies for this spam that got through. Mailman's automatic filtering catches *most* of the spam bound for the list - there are usually a few messages per day. The ones that get through are very much the exception, but it does occasionally happen. I could turn on subscriber-only posting if there's a consensus to do that. It might be inconvenient in that you have to post from the same account that you read Haskell mail from though, and I know some people have separate email accounts just for receiving Haskell mail. What do people think? Also, what do people think about the volume of Conference-related announcements sent to the list ([EMAIL PROTECTED] in particular)? Most of these get caught by the filter, and I tend to disallow only those that have no connection to programming language research at all. This could be tightened to Haskell-related or functional programming-related conferences only. Cheers, Simon ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
