Re: [Scheme-reports] some questions on byte vectors + ports

[Alex Shinn <alexshinn@x>]

On Wed, Jun 27, 2012 at 2:10 PM, Aubrey Jaffer <agj@x> wrote:
>  | Date: Wed, 27 Jun 2012 10:04:21 -0700
>  | From: Alex Shinn <alexshinn@x>
>  |
>  | On Wed, Jun 27, 2012 at 9:52 AM, Aubrey Jaffer <agj@x> wrote:
>  | >  | From: Wolfgang De Meuter <wdmeuter@x>
>  | >  | Date: Wed, 27 Jun 2012 14:06:41 +0200
>  | >  |
>  | >  | ...
>  | >  | to me, byte vectors are pretty useless if you don't have a minimal
>  | >  | amount of comfort for encoding/decoding data types.  And, given the
>  | >  | fact that you no longer support this comfort, is there sufficient
>  | >  | support to break down/ build up Scheme data types (integers,
>  | >  | float,…) into / from raw bytes ? I.e., can I convert an integer or
>  | >  | a float to a byte vector?
>  | >
>  | > SLIB provides R4RS/R5RS Scheme code to accomplish these conversions in
>  | > a way which is unaffected by host byte-order.  See:
>  | > <http://people.csail.mit.edu/jaffer/slib/Byte_002fNumber-Conversions.html#Byte_002fNumber-Conversions>
>  |
>  | Note this is not truly portable in R4/R5 - you do need read-u8
>  | and write-u8 provided by R6/R7.
>
> The SLIB conversions between numbers and byte-vectors do not require
> read-u8 or write-u8.

Oh, I thought you were referring to the I/O operators.
In that case, it's still not portable R4/R5 because these
had no portable byte-vectors (without srfi-4 or one of
the many array srfi's).

-- 
Alex

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