class/Mono.Security/Mono.Math.Prime.Generator/NextPrimeFinder.cs

   1 //
   2 // Mono.Math.Prime.Generator.NextPrimeFinder.cs - Prime Generator
   3 //
   4 // Authors:
   5 //      Ben Maurer
   6 //
   7 // Copyright (c) 2003 Ben Maurer. All rights reserved
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32
  33 namespace Mono.Math.Prime.Generator {
  34
  35         /// <summary>
  36         /// Finds the next prime after a given number.
  37         /// </summary>
  38 #if INSIDE_CORLIB
  39         internal
  40 #else
  41         public
  42 #endif
  43         class NextPrimeFinder : SequentialSearchPrimeGeneratorBase {
  44
  45                 protected override BigInteger GenerateSearchBase (int bits, object Context)
  46                 {
  47                         if (Context == null)
  48                                 throw new ArgumentNullException ("Context");
  49
  50                         BigInteger ret = new BigInteger ((BigInteger)Context);
  51                         ret.SetBit (0);
  52                         return ret;
  53                 }
  54         }
  55 }