Re: [Haskell-cafe] Suggestions for a hReadUntilStr implementation

Greg, Thanks, this'll be great to play around with. Cheers, Matt On 2/4/07, Greg Fitzgerald wrote:

Matt,

...

should finish evaluating when either the timer has run out or I recommend changing my implementation of hReadUntilStr so that the deadline is calculated upfront (have a look at System.Time), and then reducing the number of milliseconds for hReadUntilChar with each call to it.

Thanks, Greg

On 2/4/07, Matt Revelle wrote:

...

Thanks for the responses.

Greg, your implementation looks useful but it's a little different than what I was thinking (my apologies, I wasn't very clear).

In the implementation you posted, the timeout parameter is used to limit the amount of time spent waiting to read an individual character - I was hoping to use the timeout as an initial value for a timer that should start running when hReadUntilStr is evaluated and the function should finish evaluating when either the timer has run out or when the string match has been found.

Martin, thanks for the link.

Cheers, Matt

On 2/3/07, Greg Fitzgerald < garious@gmail.com> wrote:

...

Hi Matt,

...

hReadUntilStr - that is, a function that takes a Handle as an input source, a String to match, and a "Num a" as the number of seconds to wait before returning a (String, Bool) where the String is all the text read from the Handle until either matching or timing out and the Bool is true if the input String was matched

This might work for you: http://hpaste.org/289 .

It throws an IO exception if hWaitForChar times out, and makes use of

...

...

evaluation to schedule all the IO upfront so that grabbing the string

lazy prefix

...

...

can be done in pure code.

Thanks, Greg

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe