cvs commit: fptools/libraries/base/GHC IO.hs

[Simon Marlow]

simonmar    2003/04/30 01:36:22 PDT

  Modified files:
    libraries/base/GHC   IO.hs 
  Log:
  When doing hGetChar on a block-buffered handle, don't wait for the
  buffer to be completely full before returning a character.  This
  behaviour seems more useful, and matches what hGetLine and
  hGetContents do.
  
  Without this, to do an unbuffered read you have to set the buffering
  on the Handle to NoBuffering, which adversely affects the performance
  of writes.  With this change, there is now no difference between line
  buffering and block buffering for read operations.
  
  Possibly fillReadBuffer can now be simplified, since the is_line
  parameter is always True.  However, this is a delicate part of the IO
  library, and I don't want to remove the possiblity of forcing a
  complete buffer-fill in the future.
  
  Revision  Changes    Path
  1.13      +3 -1      fptools/libraries/base/GHC/IO.hs