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Ruby String to Hex <-> Hex to string
Posted: Fri Jun 08, 2012 2:21 pm
by CoreStylerz
Hi all.
Im newbie on Flowstone forum but i own synthmaker. i need to something in ruby code with flowstone for a prototype of a web application with ruby.
The problem is that i get different values with ruby. I need to generate the exactly same result of maths. but i have troubles with hex-string string-hex conversion, that does not gave me the same of flowstone.
- Ruby s2h.PNG (13.58 KiB) Viewed 22337 times
As you can see, the primitive string to hex give me 4343314435303937 from CC1D5097.
Ruby instead give 3424473239.
Someone can explain why, and a solution of this trouble?
And how to to hex to dec in ruby component?
Re: Ruby String to Hex <-> Hex to string
Posted: Fri Jun 08, 2012 3:55 pm
by Embedded
It is your FlowStone code that isn't correct, the Ruby is right.
- Ruby Hex.png (17.01 KiB) Viewed 22334 times
Re: Ruby String to Hex <-> Hex to string
Posted: Fri Jun 08, 2012 8:57 pm
by CoreStylerz
No. because if i do the same as you i continue to get the same integer value.
- ruby.PNG (15.73 KiB) Viewed 22332 times
And i don't want to use internal flowstone primitives because i already have the app created with synthmaker ( same or similar core of flowstone) and i wish to make all in internal ruby component to make a further web app. (for registering software products... challenge-response).
If flowstone/synthmaker conversion not work as it should, there are any workaround to make it 100% stable?
I tried this website
http://www.string-functions.com/string-hex.aspx it convert the sting exactly like flowstone.
Seems ruby that corrupt this.
infact
CC1D5097 = 4343314435303937
and...
i tried ruby terminal... always say 3424473239.
So maybe is ruby problem or need some things that actually i dont know.. (i started ruby yesterday.. 100% newbie
)
command was
Code: Select all
mac = "CC1D5097"
mac.hex
=>3424473239
Re: Ruby String to Hex <-> Hex to string
Posted: Sun Jun 10, 2012 6:37 am
by Embedded
Maybe we are talking at cross purposes, what is it exactly you are trying to do?
a) Convert a string of chars to hex (eg. Hello World = 48656C6C6F20576F726C64)
b) Convert a Hex number into a decimal number eg. CC1D5097 = -870494057)
In FlowStone you are using the Char String to Hex NOT the Hex String to INT module (As I did in the project I posted)
The website you posted is also Chars to hex not Hex to Int.
The Ruby code you used works (.hex or .to_i(16)) but outputs unsigned Ints that can exceed the 32 bit Max int value in FS. Yours works as a 32 bit signed number so there is a little work in Ruby to create a 32bit signed Int:
- Ruby Hex clip.png (58.59 KiB) Viewed 22312 times
For more info on binary number systems and 2's compliment visit:
http://en.wikipedia.org/wiki/Twos_complement
Re: Ruby String to Hex <-> Hex to string
Posted: Sun Jun 10, 2012 1:25 pm
by CoreStylerz
I need to pass string to hex string. then hex to dec and finally string to int with the sign.
Re: Ruby String to Hex <-> Hex to string
Posted: Mon Jun 11, 2012 1:52 pm
by Embedded
So Ruby and FlowStone are working correctly, your number system just exceeds the number system allowed on a PC running a 32 bit app.
If CC1D5097 is a string of chars then the Hex = 0x4343314435303937 = a 64 bit number, so you can't just convert it into an Integer as it exceeds the range of the number system.
Here's a new Ruby example of ASCII String to Hex String to Int, that works as long as the result is a 32 bit signed number or less.