Re: SAFE access to binary files

Henning Thielemann <iakd0@[EMAIL PROTECTED]
> wrote:

> On Sat, 17 Jan 2004, Olaf Wagner wrote:

>> Henning Thielemann <iakd0@[EMAIL PROTECTED]
> wrote:
>> 
>> > Is there a module which allows for safe access to binary files, like
audio
>> > or graphic files? I think it should sup****t such routines like 
>> 
>> >  PutInt  (wr: File.T; val: INTEGER; byteOrder: Endian; size:
CARDINAL; );
>> >  PutReal (wr: File.T; real: REAL; byteOrder: Endian; );
>> >  PutChar (wr: File.T; char: CHAR; );
>> 
>> > and so on.
>> 
>> What exactly do you mean by `safe'?

>  Using libm3/src/os/Common/File.i3 you need LOOPHOLE to convert several
> datatypes into an ARRAY OF Byte, which is an unsafe operation. When
using
> LOOPHOLE to convert an INTEGER into an ARRAY OF Byte the programs become
> machine dependent because of the byte order. Alternatively one could
> convert numbers and texts into ARRAYs OF Byte manually which is
> cumbersome. 
>  I just like to demonstrate students how to create binary files like
audio
> streams with Modula 3. 
What about the binary I/O package from m3.org, which was im****ted as
cm3/m3-libs/binIO into cm3 some time ago?

Olaf
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