Re: [9fans] awk: hex numbers? (and leak(1))

[Gabriel Diaz]

hello

sorry i mixed with bc syntax.
function is the right keyword.

gabi


On 9/20/06, Russ Cox <[EMAIL PROTECTED]> wrote:

> define todec(str) {
>         hstr="1234567890ABDCEF";
>         res=0;
>         n=split(str,digit,"");
>
>         for(i=1;i<=n;i++) {
>                 num=index(hstr,digit[i])-1;
>                 res=res+(num*16^(n-i));
>          }
>
>         return res;
> }

Here's an alternate version.
Among other things my awk doesn't seem to know about "define".

BEGIN {
       for(i=0; i<16; i++)
               _unhex[sprintf("%x", i)] = _unhex[sprintf("%X", i)] = i
}

function unhex(s,  i, v) {
       v = 0
       for (i=1; i<=length(s); i++)
               v = v*16 + _unhex[substr(s,i,1)]
       return v
}

{print unhex($1)}

Russ