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Date: Sun, 31 May 2009 23:39:48 +0300
From: Niklas Holsti <niklas.holsti@tidorum.invalid>
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Subject: Re: Howto read line from a stream
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Date: 2009-05-31T23:39:48+03:00
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Dmitry A. Kazakov wrote:

> I am not a language lawyer, but I remember a DSP processor with
> sizeof(char)=4.

Apologies for picking a nit, but that can't be the case for a 
standard-conforming C implementation -- the C standard mandates 
that sizeof(char) = 1 because "sizeof" uses the size of "char" as 
its unit of measurement.

No doubt you mean that "char" objects on this DSP were 32 bits = 4 
octets. I know that at least one GCC port for the Analog Devices 
ADSP-21020 had such "char" objects. Since that processor only has 
32-bit word addressing a smaller size for "char" would have 
required the C compiler to invent its own "octet address" type, 
with much complication and overhead. I believe that an Ada compiler 
could do that with less overhead, because the internal structure of 
access values is better hidden than in C. Perhaps an Ada compiler 
could choose 8-bit stream elements for such processors, with 
tolerable overhead.

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .