nettle.cmod - Pike-devel

12 Mar 2003

      These functions seems to never have been checked in. Should I do that?
Should they be named to_hex/from_hex, or string2hex/hex2string?
/ Niels Möller ()
Previous text:
...
2002-05-10 22:42:
Subject: nettle.cmod

Getting down to the optimal number of classes, and making the best use
of the hacks in nettle's nettle-meta.h.
But I may be able to solve the problem in a better way once I get
inherit to work. At the moment, my problem is that aes->crypt dies of
bus error...
And I've had to hack the String.from_hex and to_hex functions, as the
GMP-versions didn't handle leading zeroes right. These are the current
definitions. Do they look ok? I thought array_sscanf(s, "%@2x") would
work, but appearantly sscanf doesn't support @.
/*! @decl string from_hex(string hex)
*!
*! Convert a string of hexadecimal digits to binary data.
*!
*! @seealso
*!   @[to_hex()]
*/
string from_hex(string s)
{
 if (sizeof(s) % 2)
   error("Can't have an odd number of digits.");
return (string)(array_sscanf(s, "%{%2x%}")[0] * ({})); 
}
/*! @decl string to_hex(string hex)
*!
*! Convert a string of binary data to hexadecimal digits.
*!
*! @seealso
*!   @[from_hex()]
*/
string to_hex(string s)
{
 return sprintf("%@02x", (array(int)) s);
}
/ Niels Möller ()