Line data    Source code

       1             : 
       2             : /* Copyright (c) 2011-2013, Stefan Eilemann <eile@eyescale.ch>
       3             :  *
       4             :  * This library is free software; you can redistribute it and/or modify it under
       5             :  * the terms of the GNU Lesser General Public License version 2.1 as published
       6             :  * by the Free Software Foundation.
       7             :  *
       8             :  * This library is distributed in the hope that it will be useful, but WITHOUT
       9             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      10             :  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
      11             :  * details.
      12             :  *
      13             :  * You should have received a copy of the GNU Lesser General Public License
      14             :  * along with this library; if not, write to the Free Software Foundation, Inc.,
      15             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      16             :  */
      17             : 
      18             : #include "uint128_t.h"
      19             : #include "debug.h"
      20             : #include "rng.h"
      21             : #include "md5/md5.hh"
      22             : 
      23             : #include <cstdlib> // for strtoull
      24             : #include <cstring> // for strcmp
      25             : 
      26             : #ifdef _MSC_VER
      27             : #  define strtoull _strtoui64
      28             : #endif
      29             : 
      30             : namespace lunchbox
      31             : {
      32             : #ifdef LUNCHBOX_USE_V1_API
      33          29 : const uint128_t uint128_t::ZERO; //!< Special identifier values
      34             : 
      35           0 : uint128_t::uint128_t( const bool generate )
      36             :     : _high( 0 )
      37           0 :     , _low( 0 )
      38             : {
      39           0 :     while( generate && high() == 0 )
      40             :     {
      41           0 :         RNG rng;
      42           0 :         high() = rng.get< uint64_t >();
      43           0 :         low() = rng.get< uint64_t >();
      44           0 :     }
      45           0 : }
      46             : #endif
      47             : 
      48       90002 : uint128_t& uint128_t::operator = ( const std::string& from )
      49             : {
      50       90002 :     if( from.empty( ))
      51             :     {
      52           0 :         _high = 0;
      53           0 :         _low = 0;
      54           0 :         return *this;
      55             :     }
      56             : 
      57       90002 :     char* next = 0;
      58       90002 :     _high = ::strtoull( from.c_str(), &next, 16 );
      59       90002 :     LBASSERT( next != from.c_str( ));
      60             : 
      61       90002 :     if( *next == '\0' ) // short representation, high was 0
      62             :     {
      63           1 :         _low = _high;
      64           1 :         _high = 0;
      65             :     }
      66             :     else
      67             :     {
      68       90001 :         if( strncmp( next, "\\058" /* utf-8 ':' */, 4 ) == 0 )
      69           0 :             next += 4;
      70             :         else
      71             :         {
      72       90001 :             LBASSERTINFO( *next == ':', from << ", " << next );
      73       90001 :             ++next;
      74             :         }
      75       90001 :         _low = ::strtoull( next, 0, 16 );
      76             :     }
      77       90002 :     return *this;
      78             : }
      79             : 
      80           3 : uint128_t make_uint128( const char* string )
      81             : {
      82           3 :     const MD5 md5( (unsigned char*)string );
      83           3 :     uint128_t value;
      84           3 :     md5.raw_digest( value.high(), value.low( ));
      85           3 :     return value;
      86             : }
      87             : 
      88       99191 : uint128_t make_UUID()
      89             : {
      90       99191 :     uint128_t value;
      91      298652 :     while( value.high() == 0 )
      92             :     {
      93       99499 :         RNG rng;
      94       99398 :         value.high() = rng.get< uint64_t >();
      95       99990 :         value.low() = rng.get< uint64_t >();
      96       99999 :     }
      97       99978 :     return value;
      98             : }
      99             : 
     100          87 : }