[493c477] | 1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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[2dd068] | 2 | |
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[abddbe] | 3 | /** |
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| 4 | * @file cf_random.h |
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| 5 | * |
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| 6 | * generate random integers, random elements of finite fields |
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| 7 | **/ |
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| 8 | |
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[2dd068] | 9 | #ifndef INCL_CF_RANDOM_H |
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| 10 | #define INCL_CF_RANDOM_H |
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| 11 | |
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[e4fe2b] | 12 | // #include "config.h" |
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[b973c0] | 13 | |
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[2dd068] | 14 | #include "canonicalform.h" |
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| 15 | |
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| 16 | /*BEGINPUBLIC*/ |
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| 17 | |
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[b52d27] | 18 | /** |
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| 19 | * virtual class for random element generation |
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| 20 | **/ |
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[2dd068] | 21 | class CFRandom { |
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| 22 | public: |
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| 23 | virtual ~CFRandom() {} |
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| 24 | virtual CanonicalForm generate() const { return 0; } |
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| 25 | virtual CFRandom * clone() const { return new CFRandom(); } |
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| 26 | }; |
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| 27 | |
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[b52d27] | 28 | /** |
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| 29 | * generate random elements in GF |
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| 30 | **/ |
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[2dd068] | 31 | class GFRandom : public CFRandom |
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| 32 | { |
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| 33 | public: |
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| 34 | GFRandom() {}; |
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| 35 | ~GFRandom() {} |
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| 36 | CanonicalForm generate() const; |
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| 37 | CFRandom * clone() const; |
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| 38 | }; |
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| 39 | |
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[b52d27] | 40 | /** |
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| 41 | * generate random elements in F_p |
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| 42 | **/ |
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[2dd068] | 43 | class FFRandom : public CFRandom |
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| 44 | { |
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| 45 | public: |
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| 46 | FFRandom() {} |
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| 47 | ~FFRandom() {} |
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| 48 | CanonicalForm generate() const; |
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| 49 | CFRandom * clone() const; |
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| 50 | }; |
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| 51 | |
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[b52d27] | 52 | /** |
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| 53 | * generate random integers |
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| 54 | **/ |
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[2dd068] | 55 | class IntRandom : public CFRandom |
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| 56 | { |
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| 57 | private: |
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| 58 | int max; |
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| 59 | public: |
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| 60 | IntRandom(); |
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| 61 | IntRandom( int m ); |
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| 62 | ~IntRandom(); |
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| 63 | CanonicalForm generate() const; |
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| 64 | CFRandom * clone() const; |
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| 65 | }; |
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| 66 | |
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[b52d27] | 67 | /** |
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| 68 | * generate random elements in F_p(alpha) |
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| 69 | **/ |
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[2dd068] | 70 | class AlgExtRandomF : public CFRandom { |
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| 71 | private: |
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| 72 | Variable algext; |
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| 73 | CFRandom * gen; |
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| 74 | int n; |
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| 75 | AlgExtRandomF(); |
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| 76 | AlgExtRandomF( const Variable & v, CFRandom * g, int nn ); |
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| 77 | AlgExtRandomF& operator= ( const AlgExtRandomF & ); |
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| 78 | public: |
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[d56aae9] | 79 | AlgExtRandomF( const AlgExtRandomF & ); |
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[2dd068] | 80 | AlgExtRandomF( const Variable & v ); |
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| 81 | AlgExtRandomF( const Variable & v1, const Variable & v2 ); |
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| 82 | ~AlgExtRandomF(); |
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| 83 | CanonicalForm generate() const; |
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| 84 | CFRandom * clone() const; |
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| 85 | }; |
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| 86 | |
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| 87 | class CFRandomFactory { |
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| 88 | public: |
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| 89 | static CFRandom * generate(); |
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| 90 | }; |
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| 91 | |
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[b52d27] | 92 | /// random integers with abs less than n |
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[2dd068] | 93 | int factoryrandom( int n ); |
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| 94 | |
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[b52d27] | 95 | /// random seed initializer |
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[2dd068] | 96 | void factoryseed( int s ); |
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| 97 | |
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[eb27af] | 98 | /*ENDPUBLIC*/ |
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| 99 | |
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[493c477] | 100 | #endif /* ! INCL_CF_RANDOM_H */ |
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