Problem with UShort.parse() method on x10 - 2.1.0

[abhijit kulkarni]

Hi,

I am using x10 2.1.0 to compile my project code.

I am calling UShort.parse(<string>, 16) function to convert hex string into UShort.

It seems that this function is returning UShort value 16 irrespective of the input.

I tried to run below code on x10 2.0.6 and x10 2.1.0 -

str : String = "ff";

ub : UByte = UByte.operator_as(UShort.parse(str, 16));

Console.OUT.println(ub);

Console.OUT.println(UShort.parse(str, 16));

On x10 2.0.6, the output is -

255

255

On x10 2.1.0, the output is 16 (irrespective of any input string value)

16

16

I need this function as I am not able to proceed without it for my project.

Thanks for your help.

Regards,

Abhijit

 

[Yoav Zibin]

Maybe try to use:
Int.parse
and then cast to UShort.

[Pranay Prabhakar]

We tried using Int.parse("ff",16), the result is the same, i.e. 16. We are trying to implement a byte level encryption for which we need to read Hex strings into UBytes. Is there a tested way to proceed with this?

Thanks,

Pranay

[Yoav Zibin]

You can write that method yourself.
Convert this java code to X10:

private long parseLong(String s, int radix)
    {
        long x = 0L;

        s = s.toLowerCase();

        for (int i = 0; i < s.length(); i++) {
            int c = s.charAt(i);

            if (c < '0' || c > '9') {
                c = c - 'a' + 10;
            }
            else {
                c = c - '0';
            }

            x *= radix;
            x += c;
        }

        return x;

[Pranay Prabhakar]

Thank you for the prompt reply. We have been trying to write our conversion routine, but we encounter this error:

"AESCrypto.cc:566: error: no match for âoperator-â in âch - x10_char(48)â".

The corresponding x10 code was:  u-'a', where u:Char.

[Yoav Zibin]

You don't need to handle unicode, so just use the ASCII values directly
(so instead of 'a' use 97, and instead of '0' use 48, and '9' is 57.)

[Abhijit Kulkarni]

Hi, 

I have tried doing below things -

Here, i is Int and ch is Char

case 1 : i = (ch - 48);

AESCrypto.cc:566: error: no match for âoperator-â in âch - x10_char(48)â

case 2 : i = (ch - A), where A is var A : char = 'a'

AESCrypto.cc:551: error: no match for âoperator-â in âch - Aâ

case 3 : i = (ch - 'a')

AESCrypto.cc:545: error: no match for âoperator-â in âch - x10_char(48)â

case 4 : i = Int.parse((ch - 'a').toString())

AESCrypto.cc:560: error: no match for âoperator-â in âch - x10_char(48)â

From x10 2.1.0 documentation, char has operator - defined and it returns an Int.

But I am not able to compile any of the above cases.

Please let me know how should I use this exactly.

Thanks for your help.

Regards,

Abhijit

[Martha Kim]

Hi Abhijit,

This appears to be a typecheck error.  The problem is that you're trying to execute a subtraction on a Char type, and the error messaging is saying that they cannot find a subtraction operator for the Char type.  I'd cast (or otherwise convert) your Char to an Int, and then do the arithmetic on Ints.

Martha