Re: [Plugins-writers] converting hex to dec

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On Sat, Mar 13, 2004 at 06:17:47PM -0500, dave@private wrote:
> 
> I'm pulling values from specific places in a hex string, such as:
> 
> mystring = '006f004e6573737573';
> 
> myport = mystring[0] + mystring[1] + mystring[2] + mystring[3];
> 
> 
> Is there a function available to convert the value of "myport" to its decimal equivalent?
> 

I wanted to take a shot at it; this is what I came up with. There's probably a better way to do it though.

function hex2dec(s)
{
local_var i, j, x, var, conv, int, sum, ret;

conv =   make_array('0', '0',
                    '1', '1',
                    '2', '2',
                    '3', '3',
                    '4', '4',
                    '5', '5',
                    '6', '6',
                    '7', '7',
                    '8', '8',
                    '9', '9',
                    'a', '10',
                    'b', '11',
                    'c', '12',
                    'd', '13',
                    'e', '14',
                    'f', '15'
                   );

j = strlen(s) - 1;
x = 0;

for(i=0;i<strlen(s); i+= 1)
{
        foreach var (keys(conv)) {
                if (var == s[i]) {

                        if (var == 0) {
                                j -= 1;
                                x += 1;
                        }
                        else {
                                if (x != strlen(s) -1) {
                                        int = int(conv[var]);
                                        sum += (int * (16 ** j));
                                        j -= 1;
                                        x += 1;
                                }
                                else  {
                                        int = int(conv[var]);
                                        sum += int;
                                        }
                                }
                        }
                }
        }
return sum;
}

-dave
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