Re: CRC in Ada?

[jmatthews@nova.wright.edu (Dr. John B. Matthews)]

In article <33206340.2616@bix.com>, Tom Moran <tmoran@bix.com> writes:
> The original message in this thread did not say "reading a file a
> character at a time is slow", but rather that doing it in Ada was an
> order of magnitude slower than doing it in C, on the same OS and
> hardware.  Since there is no other way strictly in Ada to read a file
> which is too large for memory and whose size is a prime number, this is
> unfortunate.

This can't be right. For example, Streams.Stream_IO.Read lets me
read into a buffer of arbitrary size, and politely tells me if
there's any stray elements in the last chunk.

> And saying Ada 95 can do it by calling a C function, is
> less than a strong endorsement of Ada.

For efficiency, I frequently call OS routines. I rarely know what
language they're written in, although I typically access them
through a language-specific interface. For example, under MacOS, I
use Pascal interfaces and C calling conventions. The ease with which
this can be done seems like a strong endorsement of Ada.

John
----------------------------------------------------------------
John B. Matthews, M.D.
jmatthews@nova.wright.edu; john_matthews@ccmail.dayton.saic.com
"Whom the gods would destroy, they first invite to program in C"