> -----Original Message-----
> From: Stefan Oswald [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 21, 2001 8:53 AM
> To: '[EMAIL PROTECTED]'
> Subject: question concerning signed char
>
>
>
> I´ve read the term "signed char" in a script that i want to analyze. I
> checked the cookbook and cpan and i still have no clue, what
> that could
> mean.
a signed char is an integer data type with a size of one byte. 7 bits are
magnitude and 1 bit for sign (twos-complement). The range is -128 to +127.
(An unsigned char uses all 8 bits for magnitude, so the range is 0 to +255.)
unpack() needs to know whether you want to treat the byte as signed or
unsigned when converted to a perl numeric value:
$byte = chr(0xFF); # create a byte of all 1's
print unpack('c', $byte); # prints -1 (signed char)
print unapck('C', $byte); # prints 255 (unsigned char)
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