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/*
* Copyright (C) 2007-2010 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "bu/uuid.h"
#include "bu/file.h"
#include "bu/formatter.h"
#include "bu/membuf.h"
#include <string.h>
Bu::Uuid::Uuid()
{
clear();
}
Bu::Uuid::Uuid( const Uuid &src )
{
memcpy( data, src.data, 16 );
}
Bu::Uuid::~Uuid()
{
}
Bu::String Bu::Uuid::toRawString()
{
return Bu::String( (char *)data, 16 );
}
Bu::String Bu::Uuid::toString()
{
Bu::MemBuf mb;
Bu::Formatter f( mb );
for( int j = 0; j < 16; j++ )
{
if( j == 4 || j == 6 || j == 8 || j == 10 )
f << '-';
f << Bu::Fmt::hex(2).caps(false) << (unsigned int)data[j];
}
return mb.getString();
}
#define msb( i ) (1<<(7-i))
void Bu::Uuid::clear()
{
data[7] = msb(0);
}
Bu::Uuid Bu::Uuid::gen()
{
Bu::File fIn( "/proc/sys/kernel/random/uuid", Bu::File::Read );
char dat[36];
fIn.read( dat, 36 );
int iNibble = 0;
Uuid id;
memset( id.data, 0, 16 );
for( int j = 0; j < 36; j++ )
{
if( dat[j] == '-' )
continue;
unsigned char c = (dat[j]>='0'&&dat[j]<='9')?(dat[j]-'0'):(dat[j]-'a'+10);
id.data[iNibble/2] |= (iNibble%2==0)?(c<<4):(c);
iNibble++;
}
return id;
}
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