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/*
core/uid.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2.
*/
// #include <cstring>
#include "sys/sys.h"
#include "core/uid.h"
#include "math/functions.h"
#include <cstring>
namespace core
{
const char hexchar[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
UID::UID()
{
clear();
}
UID::~UID()
{
clear();
}
UID::UID(const UID & other)
{
assign(other);
}
void UID::assign(const UID & other)
{
memcpy(uid_key, other.uid_key, UIDKEYSIZE);
}
void UID::assign(const std::string & str)
{
char new_key[UIDKEYSIZE];
char l, h;
if (str.size() != UIDKEYSIZE * 2) {
return;
}
for (size_t i = 0; i < UIDKEYSIZE; i++ ) {
h = str[i * 2];
switch (h) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
new_key[i] = (h - '0') << 4;
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
new_key[i] = (h - 'a' + 10) << 4;
break;
default:
return;
break;
}
l = str[i * 2 + 1];
switch (l) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
new_key[i] += (l - '0');
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
new_key[i] += (l - 'a' + 10);
break;
default:
return;
break;
}
}
memcpy(uid_key, new_key, UIDKEYSIZE);
}
void UID::generate()
{
for (size_t i = 0; i < UIDKEYSIZE; i++) {
// FIXME the worst random key generator ever
uid_key[i] = math::randomi(256);
}
}
bool UID::is_valid() const
{
for (size_t i = 0; i < UIDKEYSIZE; i++) {
if (uid_key[i] != 0 )
return true;
}
return false;
}
void UID::clear()
{
memset(uid_key, 0, UIDKEYSIZE);
}
const std::string UID::str() const {
std::string s;
for (size_t i = 0; i < UIDKEYSIZE; i++) {
// upper nibble
s += hexchar[ uid_key[i] >> 4 ];
// lower nibble
s += hexchar[ uid_key[i] % 16 ];
}
return s;
}
} // namespace core
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