1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // Hadronic Process: Nuclear De-excitations |
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28 | // by V. Lara |
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29 | |
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30 | |
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31 | #include "G4FermiIntegerPartition.hh" |
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32 | |
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33 | void G4FermiIntegerPartition::Initialize(const G4int N, const G4int size) |
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34 | { |
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35 | total = N; |
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36 | int S(size); |
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37 | if (!enableNull) |
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38 | { |
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39 | S = std::min(size,N); |
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40 | } |
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41 | partition.clear(); |
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42 | partition.reserve(S); |
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43 | G4int ini(1); |
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44 | if (enableNull) |
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45 | { |
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46 | ini = 0; |
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47 | partition.push_back(total); |
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48 | } |
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49 | else |
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50 | { |
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51 | partition.push_back(total-S+1); |
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52 | } |
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53 | for (G4int i = 1; i < S; i++) partition.push_back(ini); |
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54 | |
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55 | #ifdef G4FermiIntegerPartition_debug |
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56 | this->TestPartition(); |
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57 | #endif |
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58 | |
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59 | return; |
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60 | } |
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61 | |
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62 | |
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63 | G4bool G4FermiIntegerPartition::Next() |
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64 | { |
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65 | std::vector<G4int>::iterator first = partition.begin(); |
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66 | std::vector<G4int>::iterator i = first+1; |
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67 | |
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68 | while ( i != partition.end() && (*first) <= (*i)+1 ) i++; |
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69 | |
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70 | if ( i == partition.end() ) |
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71 | { |
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72 | return false; |
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73 | } |
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74 | else |
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75 | { |
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76 | (*i)++; |
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77 | G4int d = -1; |
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78 | for (std::vector<G4int>::iterator j = i-1; j != first; j--) |
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79 | { |
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80 | d += (*j) - (*i); |
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81 | (*j) = (*i); |
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82 | } |
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83 | (*first) += d; |
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84 | } |
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85 | |
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86 | #ifdef G4FermiIntegerPartition_debug |
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87 | this->TestPartition(); |
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88 | #endif |
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89 | |
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90 | return true; |
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91 | } |
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92 | |
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93 | #ifdef G4FermiIntegerPartition_debug |
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94 | |
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95 | void G4FermiIntegerPartition::TestPartition() |
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96 | { |
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97 | G4int tmp = this->GetSum(); |
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98 | if (total != tmp) |
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99 | { |
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100 | std::cerr << "G4FermiIntegerPartition Error: " |
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101 | << "Partition of " << total << " into " << partition.size() |
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102 | << " is ["; |
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103 | for (std::vector<G4int>::iterator it = partition.begin(); |
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104 | it != partition.end(); ++it) |
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105 | { |
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106 | std::cerr << *it << ','; |
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107 | } |
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108 | std::cerr << "\b\b] = " << tmp << '\n'; |
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109 | } |
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110 | return; |
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111 | } |
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112 | |
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113 | #endif |
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