Re^2: HowTo unpack a vec (bitstring)

Ok, I made the following changes:

vec ($bitstring, $offset++,8) = $_ ;
[download]

So now I can do

my $bits = unpack("x1 C1", $bitstring);
[download]

However I cannot do

my $bits = unpack("x1 A1", $bitstring);
[download]

So why is it not possible to extract an integer as an ASCII character ?

LuCa

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Re^3: HowTo unpack a vec (bitstring) by Joost (Canon) on Jun 19, 2006 at 09:40 UTC
So why is it not possible to extract an integer as an ASCII character? You can. What do you think ASCII chars 0 .. 20 are? :-) "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply]
Re^4: HowTo unpack a vec (bitstring) by jeanluca (Deacon) on Jun 19, 2006 at 09:44 UTC
I still don't understand, if it is possible, my above example should extract the numbers, right ?	[reply]
Re^5: HowTo unpack a vec (bitstring) by Joost (Canon) on Jun 19, 2006 at 09:50 UTC
Nope: `unpack("x1 C1", $bitstring);` [download] that's will output a null byte, followed by the next byte interpreted as a single unsigned char value. I.e. the numeric value of that byte as a perl number. `unpack("x1 A1", $bitstring);` [download] Will output a null byte followed by the next byte AS AN ASCII CHAR. In other words, pass the byte through basically unmodified. Note that unpack returns a LIST of values. "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply] [d/l] [select]