Hello. I have a file that contains several values that I would like to
read in as hex values (e.x. 3F 5A 6B 43 0E 2F AE...) I have some partial
code:
def getHash(file_in)
f = File.new(file_in, "r")
f.each_byte {|x| print x.to_s+"\n"} #need something here
end
I would like to extract the hex values from a known offset for a
specific length, and I'm quite sure I can do that by accelorating the
pointer a bit with a simple for loop. I come from a Java background and
new to ruby so any help would be great. Thanks
Hello. I have a file that contains several values that I would like to
read in as hex values (e.x. 3F 5A 6B 43 0E 2F AE...) I have some partial
code:
def getHash(file_in)
f = File.new(file_in, "r")
f.each_byte {|x| print x.to_s+"\n"} #need something here
end
I would like to extract the hex values from a known offset for a
specific length, and I'm quite sure I can do that by accelorating the
pointer a bit with a simple for loop. I come from a Java background and
new to ruby so any help would be great. Thanks
I've read that. I'm looking for an f.gethex (returns a string with "F4"
or something) I could even deal with converting the f.getc value to a
hex value (in a string format) I'm considering writing a giant if
statement (but my fingers are starting to hurt)
Robert Klemme wrote:
···
On 27.02.2008 05:08, Ben Aroia wrote:
I would like to extract the hex values from a known offset for a
specific length, and I'm quite sure I can do that by accelorating the
pointer a bit with a simple for loop. I come from a Java background and
new to ruby so any help would be great. Thanks
I've read that. I'm looking for an f.gethex (returns a string with "F4" or something) I could even deal with converting the f.getc value to a hex value (in a string format) I'm considering writing a giant if statement (but my fingers are starting to hurt)
Robert Klemme wrote:
On 27.02.2008 05:08, Ben Aroia wrote:
I would like to extract the hex values from a known offset for a
specific length, and I'm quite sure I can do that by accelorating the
pointer a bit with a simple for loop. I come from a Java background and
new to ruby so any help would be great. Thanks
So what did you mean by "from a known offset" and "accelerating the pointer a bit with a simple loop"?
I'm looking for an f.gethex (returns a string with "F4" or something) I could even deal with converting the f.getc value to a hex value (in a string format) I'm considering writing a giant if statement (but my fingers are starting to hurt)
So what did you mean by "from a known offset" and "accelerating the pointer a bit with a simple loop"?
I'm looking for an f.gethex (returns a string with "F4" or something) I could even deal with converting the f.getc value to a hex value (in a string format) I'm considering writing a giant if statement (but my fingers are starting to hurt)
I meant that the hex string I was gunning for was, say 110 bytes into
the file, and I wanted everything between 110 and 200 to be read in in
hex. I meant I'd do something like
f = File.open("name","r")
for i in 0..109 do
f.getc
end
I meant that the hex string I was gunning for was, say 110 bytes into the file, and I wanted everything between 110 and 200 to be read in in hex. I meant I'd do something like
f = File.open("name","r")
for i in 0..109 do
f.getc
end
to bump the pointer forward 110 bytes.
It's more Rubyish to use internal iterators rather than external, for example 0.upto(109) or (0..109).each or 110.times or...
Robert Klemme did point this out in his very first post. I did not know
you could do this kind of low-level stuff in Ruby; it's probably going
to speed up some of my scripts.
Thanks for pointing out the
Thanks for pointing out the