hFileSize gives negative values

[guest]

hFileSize gives negative values for very big files.

Tested several times it works properly except in two files. They have
- 2.936.134.256 bytes
- 3.846.960.665 bytes

They are in NTFS in Windows XP SP2. Not able to test in Fat or in other OS.

The next biggest file was 1.154.008.883 bytes and it worked fine.

[igloo]

hFileSize :: Handle -> IO Integer

so there's no good reason for this at the Haskell interface level. We probably need to call a different C function to allow for larger values.

[guest]

This function is _filelengthi64. But don't forget to correct hSeek/hTell too. It's part of "New Haskell I/O library" drama which has long, long story :)

one possible temporary solution is to use my Streams library ( http://haskell.org/haskellwiki/Library/Streams) which supports large files

[simonmar]

To merge (libraries/base patch):

Wed Jan 23 10:29:04 GMT Standard Time 2008  Simon Marlow <simonmar@microsoft.com>
  * Windows: large file support for hFileSize and hSeek (#1771)

[igloo]

Merged