1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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2 | |
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3 | #ifndef INCL_CF_MAP_H |
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4 | #define INCL_CF_MAP_H |
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5 | |
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6 | /** |
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7 | * @file cf_map.h |
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8 | * |
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9 | * map polynomials |
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10 | * |
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11 | **/ |
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12 | |
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13 | // #include "config.h" |
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14 | |
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15 | #ifndef NOSTREAMIO |
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16 | #ifdef HAVE_IOSTREAM |
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17 | #include <iostream> |
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18 | #define OSTREAM std::ostream |
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19 | #elif defined(HAVE_IOSTREAM_H) |
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20 | #include <iostream.h> |
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21 | #define OSTREAM ostream |
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22 | #endif |
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23 | #endif /* NOSTREAMIO */ |
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24 | |
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25 | #include "variable.h" |
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26 | #include "canonicalform.h" |
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27 | #include <factory/templates/ftmpl_list.h> |
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28 | |
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29 | /*BEGINPUBLIC*/ |
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30 | |
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31 | /** class MapPair |
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32 | * |
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33 | * class MapPair - stores one mapping pair (Variable -> CanonicalForm). |
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34 | * |
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35 | * This class is only used to store such pairs. It has no |
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36 | * methods to transform a CanonicalForm as the class CFMap has. |
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37 | * |
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38 | * V, S: the pair (V -> S) |
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39 | * |
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40 | **/ |
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41 | /** inline method |
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42 | * |
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43 | * Variable var () const |
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44 | * CanonicalForm subst () const |
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45 | * |
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46 | * var(), subst() - selectors, return V and P, resp. |
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47 | * |
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48 | **/ |
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49 | class MapPair |
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50 | { |
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51 | private: |
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52 | Variable V; |
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53 | CanonicalForm S; |
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54 | public: |
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55 | MapPair ( const Variable & v, const CanonicalForm & s ) : V(v), S(s) {} |
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56 | MapPair () : V(), S(1) {} |
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57 | MapPair ( const MapPair & p ) : V(p.V), S(p.S) {} |
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58 | ~MapPair () {} |
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59 | MapPair & operator = ( const MapPair & p ); |
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60 | Variable var () const { return V; } |
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61 | CanonicalForm subst () const { return S; } |
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62 | #ifndef NOSTREAMIO |
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63 | void print( OSTREAM&) const; |
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64 | friend OSTREAM & operator << ( OSTREAM & s, const MapPair & p ); |
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65 | #endif /* NOSTREAMIO */ |
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66 | }; |
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67 | |
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68 | typedef List<MapPair> MPList; |
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69 | typedef ListIterator<MapPair> MPListIterator; |
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70 | |
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71 | /** class CFMap |
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72 | * |
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73 | * class CFMap - class to map canonical forms. |
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74 | * |
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75 | * Use an object of class CFMap to insert 'values' into canonical |
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76 | * form. Such a mapping is defined by a list of MapPairs (V -> S) |
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77 | * describing which canonical form S to insert for variable V. |
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78 | * Hereby, the substituted canonical forms are not subject to |
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79 | * further substitutions. |
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80 | * |
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81 | * P: list of MapPairs, sorted by level in descending order |
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82 | * |
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83 | **/ |
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84 | class CFMap |
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85 | { |
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86 | private: |
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87 | MPList P; |
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88 | public: |
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89 | CFMap () {} |
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90 | CFMap ( const CanonicalForm & s ) : P( MapPair( Variable(), s ) ) {} |
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91 | CFMap ( const Variable & v ) : P( MapPair( v, 1 ) ) {} |
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92 | CFMap ( const Variable & v, const CanonicalForm & s ) : P( MapPair( v, s ) ) {} |
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93 | ~CFMap () {} |
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94 | CFMap ( const CFList & L ); |
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95 | CFMap ( const CFMap & m ) : P( m.P ) {} |
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96 | CFMap & operator = ( const CFMap & m ); |
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97 | void newpair ( const Variable & v, const CanonicalForm & s ); |
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98 | CanonicalForm operator () ( const CanonicalForm & f ) const; |
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99 | #ifndef NOSTREAMIO |
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100 | friend OSTREAM & operator << ( OSTREAM & s, const CFMap & m ); |
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101 | #endif /* NOSTREAMIO */ |
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102 | }; |
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103 | |
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104 | CanonicalForm compress ( const CanonicalForm & f, CFMap & m ); |
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105 | void compress ( const CFArray & a, CFMap & M, CFMap & N ); |
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106 | void compress ( const CanonicalForm & f, const CanonicalForm & g, CFMap & M, CFMap & N ); |
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107 | |
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108 | /*ENDPUBLIC*/ |
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109 | |
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110 | #endif /* ! INCL_CF_MAP_H */ |
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