Hi Philippos, The secret is there in the error message: "seek operations on text-moddles are not allowed on this platform"
You need to set your file in to binary mode, with hSetBinaryMode (http://haskell.org/hoogle/?hoogle=hSetBinaryMode) or openBinaryFile (http://haskell.org/hoogle/?hoogle=openBinaryFile). After doing that hSeek will work. Thanks, Neil On Sun, Nov 1, 2009 at 8:44 PM, Philippos Apolinarius <[email protected]> wrote: > > As many people guess, I am trying to port programs from Clean 1.3 to Haskell > (and also to Clean 2.2, which is easier, but not much easier). Late Professor > Wellesley wrote an interesting data base manager in Clean 1.3 that I would > like to see in Haskell and Clean 2.2. However, when I tried to implement the > BTree algorithm, GHC compiler did not accept hSeek and other IO operations. > > D:\Programs\GHC-PROGS\docs\textut>ghc btree.hs --make > [1 of 1] Compiling Main ( btree.hs, btree.o ) > Linking btree.exe ... > > D:\Programs\GHC-PROGS\docs\textut>btree.exe > btree.exe: teste.txt: hSeek: illegal operation (seek operations on text-mod > dles are not allowed on this platform) > > To make a long story short, the program compiles, but does not run. This is > interesting, because when Clean compiles an input/output operation it > certainly executes it. In any case, what I should do in order to make file > operations work on Windows? I need random access to text files. > > > ________________________________ > All new Yahoo! Mail - Get a sneak peak at messages with a handy reading pane. > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
