in and out channels into memory

in and out channels into memory

[Jim Miller]

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Is there a way in OCaml to read and write into memory using in and out
channels in the standard distribution?  It seems like there are functions
for converting everything else to in and out channels but I can't seem to
find anything for writing into and out of memory.  If there isn't something
already, is there a function for creating new in and out channels?

Thanks

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Re: [Caml-list] in and out channels into memory

[Richard Jones]

On Sun, Jul 09, 2006 at 09:53:29PM -0400, Jim Miller wrote:
> Is there a way in OCaml to read and write into memory using in and out
> channels in the standard distribution?  It seems like there are functions
> for converting everything else to in and out channels but I can't seem to
> find anything for writing into and out of memory.  If there isn't something
> already, is there a function for creating new in and out channels?

Not for the in/out_channel in the standard distribution.

However if you can change the code to use the IO class types defined
here (http://www.ocaml-programming.de/rec/IO-Classes.html) then you
can use something like input_string from the Netstring library:

 let s = "1\n2\n3\n4" in
 let ch = new input_string s in
 ch#input_line ()

If you can't change the code, then the best you can do might be to
read and write a temporary file (see: Filename.open_temp_file).

Another alternative from the std lib is Buffer, but that also requires
changing the code.

Rich.

-- 
Richard Jones, CTO Merjis Ltd.
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