1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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2 | |
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3 | |
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4 | #include "config.h" |
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5 | |
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6 | |
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7 | #ifndef NOSTREAMIO |
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8 | #include <string.h> |
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9 | #if defined(WINNT) && ! defined(__GNUC__) |
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10 | #include <strstrea.h> |
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11 | #else |
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12 | #if __GNUC__ < 3 |
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13 | #include <strstream.h> |
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14 | #else |
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15 | #include <strstream> |
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16 | using namespace std; |
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17 | #endif |
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18 | #endif |
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19 | #endif /* NOSTREAMIO */ |
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20 | |
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21 | #include "cf_assert.h" |
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22 | |
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23 | #include "cf_defs.h" |
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24 | #include "cf_factory.h" |
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25 | #include "cfUnivarGcd.h" |
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26 | #include "int_cf.h" |
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27 | #include "int_int.h" |
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28 | #include "int_poly.h" |
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29 | #include "canonicalform.h" |
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30 | #include "variable.h" |
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31 | #include "imm.h" |
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32 | |
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33 | #ifdef HAVE_OMALLOC |
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34 | const omBin term::term_bin = omGetSpecBin(sizeof(term)); |
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35 | const omBin InternalPoly::InternalPoly_bin = omGetSpecBin(sizeof(InternalPoly)); |
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36 | #endif |
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37 | |
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38 | InternalPoly::InternalPoly( termList first, termList last, const Variable & v ) |
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39 | { |
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40 | firstTerm = first; |
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41 | lastTerm = last; |
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42 | var = v; |
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43 | } |
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44 | |
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45 | InternalPoly::InternalPoly() |
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46 | { |
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47 | ASSERT( 0, "ups, why do you initialize an empty poly" ); |
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48 | } |
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49 | |
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50 | InternalPoly::InternalPoly( const Variable & v, const int e, const CanonicalForm& c ) |
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51 | { |
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52 | var = v; |
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53 | firstTerm = new term( 0, c, e ); |
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54 | lastTerm = firstTerm; |
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55 | } |
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56 | |
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57 | InternalPoly::InternalPoly( const InternalPoly& ):InternalCF() |
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58 | { |
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59 | ASSERT( 0, "ups there is something wrong in your code" ); |
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60 | } |
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61 | |
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62 | InternalPoly::~InternalPoly() |
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63 | { |
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64 | freeTermList( firstTerm ); |
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65 | } |
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66 | |
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67 | InternalCF* |
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68 | InternalPoly::deepCopyObject() const |
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69 | { |
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70 | termList first, last; |
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71 | first = deepCopyTermList( firstTerm, last ); |
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72 | return new InternalPoly( first, last, var ); |
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73 | } |
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74 | |
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75 | InternalCF* |
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76 | InternalPoly::genZero() |
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77 | { |
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78 | return firstTerm->coeff.genZero().getval(); |
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79 | } |
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80 | |
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81 | InternalCF* |
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82 | InternalPoly::genOne() |
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83 | { |
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84 | return firstTerm->coeff.genOne().getval(); |
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85 | } |
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86 | |
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87 | bool |
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88 | InternalPoly::isUnivariate() const |
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89 | { |
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90 | termList cursor = firstTerm; |
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91 | while ( cursor ) |
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92 | { |
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93 | if ( ! cursor->coeff.inCoeffDomain() ) |
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94 | return false; |
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95 | cursor = cursor->next; |
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96 | } |
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97 | return true; |
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98 | } |
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99 | |
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100 | /** int InternalPoly::degree () |
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101 | * @sa CanonicalForm::sign () |
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102 | **/ |
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103 | int |
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104 | InternalPoly::degree () |
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105 | { |
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106 | return firstTerm->exp; |
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107 | } |
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108 | |
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109 | |
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110 | /** int InternalPoly::sign () const |
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111 | * @sa CanonicalForm::sign() |
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112 | **/ |
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113 | int |
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114 | InternalPoly::sign () const |
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115 | { |
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116 | return firstTerm->coeff.sign(); |
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117 | } |
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118 | |
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119 | |
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120 | /** |
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121 | * @sa CanonicalForm::lc(), CanonicalForm::Lc(), CanonicalForm::LC(), InternalPoly::Lc (), InternalPoly::LC () |
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122 | **/ |
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123 | CanonicalForm |
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124 | InternalPoly::lc () |
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125 | { |
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126 | return firstTerm->coeff.lc(); |
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127 | } |
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128 | |
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129 | /** |
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130 | * @sa CanonicalForm::lc(), CanonicalForm::Lc(), CanonicalForm::LC(), InternalPoly::lc (), InternalPoly::LC () |
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131 | **/ |
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132 | CanonicalForm |
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133 | InternalPoly::Lc () |
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134 | { |
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135 | return firstTerm->coeff.Lc(); |
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136 | } |
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137 | |
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138 | /** |
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139 | * @sa CanonicalForm::lc(), CanonicalForm::Lc(), CanonicalForm::LC(), InternalPoly::lc (), InternalPoly::Lc () |
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140 | **/ |
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141 | CanonicalForm |
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142 | InternalPoly::LC () |
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143 | { |
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144 | return firstTerm->coeff; |
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145 | } |
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146 | |
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147 | /** CanonicalForm InternalPoly::tailcoeff (), int InternalPoly::taildegree () |
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148 | * @sa CanonicalForm::tailcoeff(), taildegree() |
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149 | **/ |
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150 | CanonicalForm |
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151 | InternalPoly::tailcoeff () |
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152 | { |
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153 | return lastTerm->coeff; |
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154 | } |
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155 | |
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156 | int |
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157 | InternalPoly::taildegree () |
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158 | { |
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159 | return lastTerm->exp; |
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160 | } |
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161 | |
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162 | /** CanonicalForm InternalPoly::coeff ( int i ) |
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163 | * @sa CanonicalForm::operator []() |
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164 | **/ |
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165 | CanonicalForm |
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166 | InternalPoly::coeff ( int i ) |
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167 | { |
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168 | termList theCursor = firstTerm; |
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169 | while ( theCursor ) |
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170 | { |
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171 | if ( theCursor->exp == i ) |
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172 | return theCursor->coeff; |
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173 | else if ( theCursor->exp < i ) |
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174 | return CanonicalForm( 0 ); |
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175 | else |
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176 | theCursor = theCursor->next; |
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177 | } |
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178 | return CanonicalForm( 0 ); |
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179 | } |
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180 | |
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181 | #ifndef NOSTREAMIO |
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182 | void |
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183 | InternalPoly::print(OSTREAM &aStream, char * aString ) |
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184 | { |
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185 | if ( ! firstTerm ) |
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186 | aStream << 0 << aString; |
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187 | else |
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188 | { |
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189 | char * theString; |
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190 | termList theCursor = firstTerm; |
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191 | while ( theCursor ) |
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192 | { |
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193 | ostrstream theStream; |
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194 | if ( theCursor->exp == 0 ) |
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195 | theCursor->coeff.print( aStream, aString ); |
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196 | else if ( theCursor->coeff.isOne() ) |
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197 | { |
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198 | aStream << var; |
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199 | if ( theCursor->exp != 1 ) |
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200 | aStream << '^' << theCursor->exp << aString; |
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201 | else |
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202 | aStream << aString; |
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203 | } |
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204 | else if ( theCursor->coeff.sign() < 0 && (-theCursor->coeff).isOne() ) |
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205 | { |
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206 | aStream << '-' << var; |
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207 | if ( theCursor->exp != 1 ) |
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208 | aStream << '^' << theCursor->exp << aString; |
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209 | else |
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210 | aStream << aString; |
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211 | } |
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212 | else |
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213 | { |
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214 | theStream << '*' << var; |
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215 | if ( theCursor->exp != 1 ) |
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216 | theStream << '^' << theCursor->exp << aString << ends; |
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217 | else |
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218 | theStream << aString << ends; // results from error in GNU strstream |
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219 | theString = theStream.str(); |
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220 | theCursor->coeff.print( aStream, theString ); |
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221 | theStream.freeze(0);//delete [] theString; |
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222 | } |
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223 | theCursor = theCursor->next; |
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224 | if ( theCursor && ( theCursor->coeff.sign() >= 0 ) ) |
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225 | aStream << '+'; |
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226 | } |
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227 | } |
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228 | } |
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229 | #endif /* NOSTREAMIO */ |
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230 | |
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231 | /** InternalCF * InternalPoly::neg () |
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232 | * @sa CanonicalForm::operator -() |
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233 | **/ |
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234 | InternalCF * |
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235 | InternalPoly::neg () |
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236 | { |
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237 | if ( getRefCount() <= 1 ) |
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238 | { |
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239 | negateTermList( firstTerm ); |
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240 | return this; |
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241 | } |
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242 | else |
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243 | { |
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244 | decRefCount(); |
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245 | termList last, first = copyTermList( firstTerm, last, true ); |
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246 | return new InternalPoly( first, last, var ); |
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247 | } |
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248 | } |
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249 | |
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250 | InternalCF* |
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251 | InternalPoly::invert() |
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252 | { |
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253 | if ( inExtension() && getReduce( var ) ) |
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254 | { |
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255 | setReduce( var, false ); |
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256 | CanonicalForm a( this->copyObject() ); |
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257 | CanonicalForm b = getMipo( var ); |
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258 | CanonicalForm u, v; |
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259 | CanonicalForm g = extgcd( a, b, u, v ); |
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260 | setReduce( var, true ); |
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261 | return u.getval(); |
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262 | } |
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263 | else |
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264 | return CFFactory::basic( 0L ); |
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265 | } |
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266 | |
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267 | InternalCF* |
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268 | InternalPoly::tryInvert ( const CanonicalForm& M, bool& fail) |
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269 | { |
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270 | if ( inExtension() && !getReduce ( var ) ) |
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271 | { |
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272 | CanonicalForm b, inverse; |
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273 | CanonicalForm F ( this ->copyObject() ); |
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274 | Variable a = M.mvar(); |
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275 | Variable x = Variable(1); |
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276 | F= mod (F, M); //reduce mod M |
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277 | CanonicalForm g= extgcd (replacevar( F, a, x ), replacevar( M, a, x ), inverse, b ); |
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278 | if(!g.isOne()) |
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279 | fail = true; |
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280 | else |
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281 | inverse = replacevar( inverse, x, a ); // change back to alg var |
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282 | CanonicalForm test= mod (inverse*F, M); |
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283 | return inverse.getval(); |
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284 | } |
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285 | else |
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286 | return CFFactory::basic( 0L ); |
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287 | } |
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288 | |
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289 | InternalCF* |
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290 | InternalPoly::addsame( InternalCF* aCoeff ) |
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291 | { |
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292 | InternalPoly * aPoly = (InternalPoly*)aCoeff; |
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293 | if ( getRefCount() <= 1 ) |
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294 | { |
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295 | firstTerm = addTermList( firstTerm, aPoly->firstTerm, lastTerm, false ); |
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296 | if ( firstTerm && firstTerm->exp != 0 ) |
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297 | return this; |
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298 | else if ( firstTerm ) |
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299 | { |
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300 | InternalCF * res = firstTerm->coeff.getval(); |
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301 | delete this; |
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302 | return res; |
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303 | } |
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304 | else |
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305 | { |
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306 | delete this; |
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307 | return CFFactory::basic( 0L ); |
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308 | } |
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309 | } |
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310 | else |
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311 | { |
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312 | decRefCount(); |
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313 | termList last, first = copyTermList( firstTerm, last ); |
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314 | first = addTermList( first, aPoly->firstTerm, last, false ); |
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315 | if ( first && first->exp != 0 ) |
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316 | return new InternalPoly( first, last, var ); |
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317 | else if ( first ) |
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318 | { |
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319 | InternalCF * res = first->coeff.getval(); |
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320 | delete first; |
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321 | return res; |
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322 | } |
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323 | else |
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324 | return CFFactory::basic( 0L ); |
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325 | |
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326 | } |
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327 | } |
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328 | |
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329 | InternalCF* |
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330 | InternalPoly::subsame( InternalCF* aCoeff ) |
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331 | { |
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332 | InternalPoly * aPoly = (InternalPoly*)aCoeff; |
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333 | if ( getRefCount() <= 1 ) |
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334 | { |
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335 | firstTerm = addTermList( firstTerm, aPoly->firstTerm, lastTerm, true ); |
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336 | if ( firstTerm && firstTerm->exp != 0 ) |
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337 | return this; |
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338 | else if ( firstTerm ) |
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339 | { |
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340 | InternalCF * res = firstTerm->coeff.getval(); |
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341 | delete this; |
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342 | return res; |
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343 | } |
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344 | else |
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345 | { |
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346 | delete this; |
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347 | return CFFactory::basic( 0L ); |
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348 | } |
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349 | } |
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350 | else |
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351 | { |
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352 | decRefCount(); |
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353 | termList last, first = copyTermList( firstTerm, last ); |
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354 | first = addTermList( first, aPoly->firstTerm, last, true ); |
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355 | if ( first && first->exp != 0 ) |
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356 | return new InternalPoly( first, last, var ); |
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357 | else if ( first ) |
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358 | { |
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359 | InternalCF * res = first->coeff.getval(); |
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360 | delete first; |
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361 | return res; |
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362 | } |
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363 | else |
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364 | return CFFactory::basic( 0L ); |
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365 | |
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366 | } |
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367 | } |
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368 | |
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369 | InternalCF* |
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370 | InternalPoly::mulsame( InternalCF* aCoeff ) |
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371 | { |
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372 | if (is_imm(aCoeff)) return mulcoeff(aCoeff); |
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373 | InternalPoly *aPoly = (InternalPoly*)aCoeff; |
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374 | termList resultFirst = 0, resultLast = 0; |
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375 | termList theCursor = firstTerm; |
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376 | |
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377 | while ( theCursor ) |
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378 | { |
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379 | resultFirst = mulAddTermList( resultFirst, aPoly->firstTerm, |
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380 | theCursor->coeff, theCursor->exp, resultLast, false ); |
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381 | theCursor = theCursor->next; |
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382 | } |
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383 | if ( inExtension() && getReduce( var ) ) |
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384 | { |
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385 | resultFirst = reduceTermList( resultFirst, (getInternalMipo( var ))->firstTerm, resultLast ); |
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386 | if ( resultFirst == 0 ) |
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387 | { |
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388 | if ( getRefCount() <= 1 ) |
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389 | { |
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390 | delete this; |
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391 | return CFFactory::basic(0L); |
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392 | } |
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393 | else |
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394 | { |
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395 | decRefCount(); |
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396 | return CFFactory::basic(0L); |
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397 | } |
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398 | } |
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399 | else if ( resultFirst->exp == 0 ) |
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400 | { |
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401 | if ( getRefCount() <= 1 ) |
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402 | { |
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403 | InternalCF * res = resultFirst->coeff.getval(); |
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404 | delete resultFirst; |
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405 | delete this; |
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406 | return res; |
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407 | } |
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408 | else |
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409 | { |
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410 | decRefCount(); |
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411 | InternalCF * res = resultFirst->coeff.getval(); |
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412 | delete resultFirst; |
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413 | return res; |
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414 | } |
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415 | } |
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416 | } |
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417 | if ( getRefCount() <= 1 ) |
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418 | { |
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419 | freeTermList( firstTerm ); |
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420 | firstTerm = resultFirst; |
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421 | lastTerm = resultLast; |
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422 | return this; |
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423 | } |
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424 | else |
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425 | { |
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426 | decRefCount(); |
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427 | return new InternalPoly( resultFirst, resultLast, var ); |
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428 | } |
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429 | } |
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430 | |
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431 | InternalCF* |
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432 | InternalPoly::tryMulsame( InternalCF* aCoeff, const CanonicalForm& M) |
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433 | { |
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434 | if (is_imm(aCoeff)) |
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435 | return mulcoeff(aCoeff); |
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436 | InternalPoly *aPoly = (InternalPoly*)aCoeff; |
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437 | termList resultFirst = 0, resultLast = 0; |
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438 | termList theCursor = firstTerm; |
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439 | |
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440 | while ( theCursor ) |
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441 | { |
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442 | resultFirst = mulAddTermList( resultFirst, aPoly->firstTerm, |
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443 | theCursor->coeff, theCursor->exp, resultLast, false ); |
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444 | theCursor = theCursor->next; |
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445 | } |
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446 | if ( inExtension() && !getReduce( var ) ) |
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447 | { |
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448 | resultFirst= reduceTermList (resultFirst, ((InternalPoly*) M.getval())->firstTerm, resultLast); |
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449 | if ( resultFirst == 0 ) |
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450 | { |
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451 | if ( getRefCount() <= 1 ) |
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452 | { |
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453 | delete this; |
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454 | return CFFactory::basic(0L); |
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455 | } |
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456 | else |
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457 | { |
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458 | decRefCount(); |
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459 | return CFFactory::basic(0L); |
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460 | } |
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461 | } |
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462 | else if ( resultFirst->exp == 0 ) |
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463 | { |
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464 | if ( getRefCount() <= 1 ) |
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465 | { |
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466 | InternalCF * res = resultFirst->coeff.getval(); |
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467 | delete resultFirst; |
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468 | delete this; |
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469 | return res; |
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470 | } |
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471 | else |
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472 | { |
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473 | decRefCount(); |
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474 | InternalCF * res = resultFirst->coeff.getval(); |
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475 | delete resultFirst; |
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476 | return res; |
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477 | } |
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478 | } |
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479 | } |
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480 | if ( getRefCount() <= 1 ) |
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481 | { |
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482 | freeTermList( firstTerm ); |
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483 | firstTerm = resultFirst; |
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484 | lastTerm = resultLast; |
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485 | return this; |
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486 | } |
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487 | else |
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488 | { |
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489 | decRefCount(); |
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490 | return new InternalPoly( resultFirst, resultLast, var ); |
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491 | } |
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492 | } |
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493 | |
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494 | InternalCF* |
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495 | InternalPoly::dividesame( InternalCF* aCoeff ) |
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496 | { |
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497 | return divsame( aCoeff ); |
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498 | } |
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499 | |
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500 | |
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501 | InternalCF* |
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502 | InternalPoly::divsame( InternalCF* aCoeff ) |
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503 | { |
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504 | if ( inExtension() && getReduce( var ) ) |
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505 | { |
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506 | InternalCF * dummy = aCoeff->invert(); |
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507 | if (is_imm(dummy)) dummy=this->mulsame(dummy); |
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508 | else dummy = dummy->mulsame( this ); |
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509 | if ( getRefCount() <= 1 ) |
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510 | { |
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511 | delete this; |
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512 | return dummy; |
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513 | } |
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514 | else |
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515 | { |
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516 | decRefCount(); |
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517 | return dummy; |
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518 | } |
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519 | } |
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520 | InternalPoly *aPoly = (InternalPoly*)aCoeff; |
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521 | termList dummy, first, last, resultfirst = 0, resultlast = 0; |
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522 | CanonicalForm coeff, newcoeff; |
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523 | int exp, newexp; |
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524 | bool singleObject; |
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525 | |
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526 | if ( getRefCount() <= 1 ) |
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527 | { |
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528 | first = firstTerm; last = lastTerm; singleObject = true; |
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529 | } |
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530 | else |
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531 | { |
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532 | first = copyTermList( firstTerm, last ); singleObject = false; |
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533 | decRefCount(); |
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534 | } |
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535 | coeff = aPoly->firstTerm->coeff; |
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536 | exp = aPoly->firstTerm->exp; |
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537 | while (first && ( first->exp >= exp ) ) |
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538 | { |
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539 | newcoeff = first->coeff / coeff; |
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540 | newexp = first->exp - exp; |
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541 | dummy = first; |
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542 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
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543 | delete dummy; |
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544 | appendTermList( resultfirst, resultlast, newcoeff, newexp ); |
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545 | } |
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546 | freeTermList( first ); |
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547 | if ( singleObject ) |
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548 | { |
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549 | if ( resultfirst && resultfirst->exp != 0 ) |
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550 | { |
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551 | firstTerm = resultfirst; |
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552 | lastTerm = resultlast; |
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553 | return this; |
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554 | } |
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555 | else if ( resultfirst ) |
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556 | { |
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557 | InternalCF * res = resultfirst->coeff.getval(); |
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558 | delete resultfirst; |
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559 | firstTerm = 0; |
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560 | delete this; |
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561 | return res; |
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562 | } |
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563 | else |
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564 | { |
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565 | // this should not happen (evtl use assertion) |
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566 | ASSERT( 0, "FATAL ERROR, PLEASE INFORM THE AUTHOR" ); |
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567 | firstTerm = 0; |
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568 | delete this; |
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569 | return CFFactory::basic( 0L ); |
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570 | } |
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571 | } |
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572 | else |
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573 | { |
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574 | if ( resultfirst && resultfirst->exp != 0 ) |
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575 | return new InternalPoly( resultfirst, resultlast, var ); |
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576 | else if ( resultfirst ) |
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577 | { |
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578 | InternalCF * res = resultfirst->coeff.getval(); |
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579 | delete resultfirst; |
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580 | return res; |
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581 | } |
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582 | else |
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583 | return CFFactory::basic( 0L ); |
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584 | } |
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585 | } |
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586 | |
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587 | InternalCF* |
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588 | InternalPoly::tryDivsame( InternalCF* aCoeff, const CanonicalForm& M, bool& fail ) |
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589 | { |
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590 | if ( inExtension() && !getReduce( var ) ) |
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591 | { |
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592 | InternalCF * dummy = aCoeff->tryInvert(M, fail); |
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593 | if (fail) |
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594 | return CFFactory::basic( 0L ); |
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595 | if (is_imm(dummy)) dummy=this->tryMulsame(dummy, M); |
---|
596 | else dummy = dummy->tryMulsame( this, M); |
---|
597 | if (fail) |
---|
598 | { |
---|
599 | if (getRefCount() <= 1) |
---|
600 | delete this; |
---|
601 | else |
---|
602 | decRefCount(); |
---|
603 | return dummy; |
---|
604 | } |
---|
605 | if ( getRefCount() <= 1 ) |
---|
606 | { |
---|
607 | delete this; |
---|
608 | return dummy; |
---|
609 | } |
---|
610 | else |
---|
611 | { |
---|
612 | decRefCount(); |
---|
613 | return dummy; |
---|
614 | } |
---|
615 | } |
---|
616 | InternalPoly *aPoly = (InternalPoly*)aCoeff; |
---|
617 | termList dummy, first, last, resultfirst = 0, resultlast = 0; |
---|
618 | CanonicalForm coeff, newcoeff; |
---|
619 | int exp, newexp; |
---|
620 | bool singleObject; |
---|
621 | |
---|
622 | if ( getRefCount() <= 1 ) |
---|
623 | { |
---|
624 | first = firstTerm; last = lastTerm; singleObject = true; |
---|
625 | } |
---|
626 | else |
---|
627 | { |
---|
628 | first = copyTermList( firstTerm, last ); singleObject = false; |
---|
629 | decRefCount(); |
---|
630 | } |
---|
631 | coeff = aPoly->firstTerm->coeff; |
---|
632 | exp = aPoly->firstTerm->exp; |
---|
633 | while (first && ( first->exp >= exp ) ) |
---|
634 | { |
---|
635 | newcoeff= first->coeff.tryDiv (coeff, M, fail); |
---|
636 | if (fail) |
---|
637 | { |
---|
638 | freeTermList (first); |
---|
639 | return CFFactory::basic (0L); |
---|
640 | } |
---|
641 | newcoeff= reduce (newcoeff, M); |
---|
642 | newexp = first->exp - exp; |
---|
643 | dummy = first; |
---|
644 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
---|
645 | delete dummy; |
---|
646 | if (!newcoeff.isZero()) |
---|
647 | appendTermList( resultfirst, resultlast, newcoeff, newexp ); |
---|
648 | } |
---|
649 | freeTermList( first ); |
---|
650 | if ( singleObject ) |
---|
651 | { |
---|
652 | if ( resultfirst && resultfirst->exp != 0 ) |
---|
653 | { |
---|
654 | firstTerm = resultfirst; |
---|
655 | lastTerm = resultlast; |
---|
656 | return this; |
---|
657 | } |
---|
658 | else if ( resultfirst ) |
---|
659 | { |
---|
660 | InternalCF * res = resultfirst->coeff.getval(); |
---|
661 | delete resultfirst; |
---|
662 | firstTerm = 0; |
---|
663 | delete this; |
---|
664 | return res; |
---|
665 | } |
---|
666 | else |
---|
667 | { |
---|
668 | // this should not happen (evtl use assertion) |
---|
669 | ASSERT( 0, "FATAL ERROR, PLEASE INFORM THE AUTHOR" ); |
---|
670 | firstTerm = 0; |
---|
671 | delete this; |
---|
672 | return CFFactory::basic( 0L ); |
---|
673 | } |
---|
674 | } |
---|
675 | else |
---|
676 | { |
---|
677 | if ( resultfirst && resultfirst->exp != 0 ) |
---|
678 | return new InternalPoly( resultfirst, resultlast, var ); |
---|
679 | else if ( resultfirst ) |
---|
680 | { |
---|
681 | InternalCF * res = resultfirst->coeff.getval(); |
---|
682 | delete resultfirst; |
---|
683 | return res; |
---|
684 | } |
---|
685 | else |
---|
686 | return CFFactory::basic( 0L ); |
---|
687 | } |
---|
688 | } |
---|
689 | |
---|
690 | InternalCF* |
---|
691 | InternalPoly::modulosame( InternalCF* aCoeff ) |
---|
692 | { |
---|
693 | return modsame( aCoeff ); |
---|
694 | } |
---|
695 | |
---|
696 | InternalCF* |
---|
697 | InternalPoly::modsame( InternalCF* aCoeff ) |
---|
698 | { |
---|
699 | if ( inExtension() && getReduce( var ) ) |
---|
700 | { |
---|
701 | if ( deleteObject() ) delete this; |
---|
702 | return CFFactory::basic( 0L ); |
---|
703 | } |
---|
704 | InternalPoly *aPoly = (InternalPoly*)aCoeff; |
---|
705 | termList dummy, first, last; |
---|
706 | CanonicalForm coeff, newcoeff; |
---|
707 | int exp, newexp; |
---|
708 | bool singleObject; |
---|
709 | |
---|
710 | if ( getRefCount() <= 1 ) |
---|
711 | { |
---|
712 | first = firstTerm; last = lastTerm; singleObject = true; |
---|
713 | } |
---|
714 | else |
---|
715 | { |
---|
716 | first = copyTermList( firstTerm, last ); singleObject = false; |
---|
717 | decRefCount(); |
---|
718 | } |
---|
719 | coeff = aPoly->firstTerm->coeff; |
---|
720 | exp = aPoly->firstTerm->exp; |
---|
721 | while (first && ( first->exp >= exp ) ) |
---|
722 | { |
---|
723 | newcoeff = first->coeff / coeff; |
---|
724 | newexp = first->exp - exp; |
---|
725 | dummy = first; |
---|
726 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
---|
727 | delete dummy; |
---|
728 | } |
---|
729 | if ( singleObject ) |
---|
730 | { |
---|
731 | if ( first && first->exp != 0 ) |
---|
732 | { |
---|
733 | firstTerm = first; |
---|
734 | lastTerm = last; |
---|
735 | return this; |
---|
736 | } |
---|
737 | else if ( first ) |
---|
738 | { |
---|
739 | InternalCF * res = first->coeff.getval(); |
---|
740 | delete first; |
---|
741 | firstTerm = 0; |
---|
742 | delete this; |
---|
743 | return res; |
---|
744 | } |
---|
745 | else |
---|
746 | { |
---|
747 | firstTerm = 0; |
---|
748 | delete this; |
---|
749 | return CFFactory::basic( 0L ); |
---|
750 | } |
---|
751 | } |
---|
752 | else |
---|
753 | { |
---|
754 | if ( first && first->exp != 0 ) |
---|
755 | return new InternalPoly( first, last, var ); |
---|
756 | else if ( first ) |
---|
757 | { |
---|
758 | InternalCF * res = first->coeff.getval(); |
---|
759 | delete first; |
---|
760 | return res; |
---|
761 | } |
---|
762 | else |
---|
763 | return CFFactory::basic( 0L ); |
---|
764 | } |
---|
765 | } |
---|
766 | |
---|
767 | |
---|
768 | void |
---|
769 | InternalPoly::divremsame( InternalCF* acoeff, InternalCF*& quot, InternalCF*& rem ) |
---|
770 | { |
---|
771 | if ( inExtension() && getReduce( var ) ) |
---|
772 | { |
---|
773 | InternalCF * dummy = acoeff->invert(); |
---|
774 | quot = dummy->mulsame( this ); |
---|
775 | rem = CFFactory::basic( 0L ); |
---|
776 | } |
---|
777 | else |
---|
778 | { |
---|
779 | InternalPoly *aPoly = (InternalPoly*)acoeff; |
---|
780 | termList dummy, first, last, resultfirst = 0, resultlast = 0; |
---|
781 | CanonicalForm coeff, newcoeff; |
---|
782 | int exp, newexp; |
---|
783 | |
---|
784 | first = copyTermList( firstTerm, last ); |
---|
785 | |
---|
786 | coeff = aPoly->firstTerm->coeff; |
---|
787 | exp = aPoly->firstTerm->exp; |
---|
788 | while (first && ( first->exp >= exp ) ) |
---|
789 | { |
---|
790 | newcoeff = first->coeff / coeff; |
---|
791 | newexp = first->exp - exp; |
---|
792 | dummy = first; |
---|
793 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
---|
794 | delete dummy; |
---|
795 | appendTermList( resultfirst, resultlast, newcoeff, newexp ); |
---|
796 | } |
---|
797 | if ( resultfirst ) |
---|
798 | if ( resultfirst->exp == 0 ) |
---|
799 | { |
---|
800 | quot = resultfirst->coeff.getval(); |
---|
801 | delete resultfirst; |
---|
802 | } |
---|
803 | else |
---|
804 | quot = new InternalPoly( resultfirst, resultlast, var ); |
---|
805 | else |
---|
806 | quot = CFFactory::basic( 0L ); |
---|
807 | if ( first ) |
---|
808 | if ( first->exp == 0 ) |
---|
809 | { |
---|
810 | rem = first->coeff.getval(); |
---|
811 | delete first; |
---|
812 | } |
---|
813 | else |
---|
814 | rem = new InternalPoly( first, last, var ); |
---|
815 | else |
---|
816 | rem = CFFactory::basic( 0L ); |
---|
817 | } |
---|
818 | } |
---|
819 | |
---|
820 | bool |
---|
821 | InternalPoly::divremsamet( InternalCF* acoeff, InternalCF*& quot, InternalCF*& rem ) |
---|
822 | { |
---|
823 | if ( inExtension() && getReduce( var ) ) |
---|
824 | { |
---|
825 | divremsame( acoeff, quot, rem ); |
---|
826 | return true; |
---|
827 | } |
---|
828 | InternalPoly *aPoly = (InternalPoly*)acoeff; |
---|
829 | termList dummy, first, last, resultfirst = 0, resultlast = 0; |
---|
830 | CanonicalForm coeff, newcoeff, dummycoeff; |
---|
831 | int exp, newexp; |
---|
832 | bool divideok = true; |
---|
833 | |
---|
834 | // if ( ! ::divremt( lastTerm->coeff, aPoly->lastTerm->coeff, newcoeff, dummycoeff ) ) |
---|
835 | // return false; |
---|
836 | |
---|
837 | first = copyTermList( firstTerm, last ); |
---|
838 | |
---|
839 | coeff = aPoly->firstTerm->coeff; |
---|
840 | exp = aPoly->firstTerm->exp; |
---|
841 | while (first && ( first->exp >= exp ) && divideok ) |
---|
842 | { |
---|
843 | divideok = divremt( first->coeff, coeff, newcoeff, dummycoeff ); |
---|
844 | if ( divideok && dummycoeff.isZero() ) |
---|
845 | { |
---|
846 | newexp = first->exp - exp; |
---|
847 | dummy = first; |
---|
848 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
---|
849 | delete dummy; |
---|
850 | appendTermList( resultfirst, resultlast, newcoeff, newexp ); |
---|
851 | } |
---|
852 | else |
---|
853 | divideok = false; |
---|
854 | } |
---|
855 | if ( divideok ) |
---|
856 | { |
---|
857 | if ( resultfirst ) |
---|
858 | if ( resultfirst->exp == 0 ) |
---|
859 | { |
---|
860 | quot = resultfirst->coeff.getval(); |
---|
861 | delete resultfirst; |
---|
862 | } |
---|
863 | else |
---|
864 | quot = new InternalPoly( resultfirst, resultlast, var ); |
---|
865 | else |
---|
866 | quot = CFFactory::basic( 0L ); |
---|
867 | if ( first ) |
---|
868 | if ( first->exp == 0 ) |
---|
869 | { |
---|
870 | rem = first->coeff.getval(); |
---|
871 | delete first; |
---|
872 | } |
---|
873 | else |
---|
874 | rem = new InternalPoly( first, last, var ); |
---|
875 | else |
---|
876 | rem = CFFactory::basic( 0L ); |
---|
877 | } |
---|
878 | else |
---|
879 | { |
---|
880 | freeTermList( resultfirst ); |
---|
881 | freeTermList( first ); |
---|
882 | } |
---|
883 | return divideok; |
---|
884 | } |
---|
885 | |
---|
886 | bool |
---|
887 | InternalPoly::tryDivremsamet( InternalCF* acoeff, InternalCF*& quot, InternalCF*& rem, const CanonicalForm& M, bool& fail) |
---|
888 | { |
---|
889 | if (inExtension() && !getReduce (var)) |
---|
890 | { |
---|
891 | InternalCF * dummy = acoeff->tryInvert(M, fail); |
---|
892 | if (fail) |
---|
893 | return false; |
---|
894 | quot = dummy->tryMulsame( this, M); |
---|
895 | rem = CFFactory::basic( 0L ); |
---|
896 | if (fail) |
---|
897 | return false; |
---|
898 | return true; |
---|
899 | } |
---|
900 | InternalPoly *aPoly = (InternalPoly*)acoeff; |
---|
901 | termList dummy, first, last, resultfirst = 0, resultlast = 0; |
---|
902 | CanonicalForm coeff, newcoeff, dummycoeff; |
---|
903 | int exp, newexp; |
---|
904 | bool divideok = true; |
---|
905 | |
---|
906 | first = copyTermList( firstTerm, last ); |
---|
907 | |
---|
908 | coeff = aPoly->firstTerm->coeff; |
---|
909 | exp = aPoly->firstTerm->exp; |
---|
910 | while (first && ( first->exp >= exp ) && divideok ) |
---|
911 | { |
---|
912 | divideok = tryDivremt( first->coeff, coeff, newcoeff, dummycoeff, M, fail ); |
---|
913 | if (fail) |
---|
914 | { |
---|
915 | freeTermList (first); |
---|
916 | return false; |
---|
917 | } |
---|
918 | if ( divideok && dummycoeff.isZero() ) |
---|
919 | { |
---|
920 | newexp = first->exp - exp; |
---|
921 | dummy = first; |
---|
922 | first = mulAddTermList( first->next, aPoly->firstTerm->next, newcoeff, newexp, last, true ); |
---|
923 | delete dummy; |
---|
924 | if (!newcoeff.isZero()) |
---|
925 | appendTermList( resultfirst, resultlast, newcoeff, newexp ); |
---|
926 | } |
---|
927 | else |
---|
928 | divideok = false; |
---|
929 | } |
---|
930 | if ( divideok ) |
---|
931 | { |
---|
932 | if ( resultfirst ) |
---|
933 | if ( resultfirst->exp == 0 ) |
---|
934 | { |
---|
935 | quot = resultfirst->coeff.getval(); |
---|
936 | delete resultfirst; |
---|
937 | } |
---|
938 | else |
---|
939 | quot = new InternalPoly( resultfirst, resultlast, var ); |
---|
940 | else |
---|
941 | quot = CFFactory::basic( 0L ); |
---|
942 | if ( first ) |
---|
943 | if ( first->exp == 0 ) |
---|
944 | { |
---|
945 | rem = first->coeff.getval(); |
---|
946 | delete first; |
---|
947 | } |
---|
948 | else |
---|
949 | { |
---|
950 | if (first->coeff.isZero()) |
---|
951 | { |
---|
952 | rem= CFFactory::basic (0L); |
---|
953 | delete first; |
---|
954 | } |
---|
955 | else |
---|
956 | rem = new InternalPoly( first, last, var ); |
---|
957 | } |
---|
958 | else |
---|
959 | rem = CFFactory::basic( 0L ); |
---|
960 | } |
---|
961 | else |
---|
962 | { |
---|
963 | freeTermList( resultfirst ); |
---|
964 | freeTermList( first ); |
---|
965 | } |
---|
966 | return divideok; |
---|
967 | } |
---|
968 | |
---|
969 | /** |
---|
970 | * comparesame(), comparecoeff() - compare with an |
---|
971 | * InternalPoly. |
---|
972 | * |
---|
973 | * comparesame() compares the coefficient vectors of f=CO and |
---|
974 | * g=acoeff w.r.t to a lexicographic order in the following way: |
---|
975 | * f < g iff there exists an 0 <= i <= max(deg(f),deg(g)) s.t. |
---|
976 | * i) f[j] = g[j] for all i < j <= max(deg(f),deg(g)) and |
---|
977 | * ii) g[i] occurs in g (i.e. is not equal to zero) and |
---|
978 | * f[i] does not occur in f or f[i] < g[i] if f[i] occurs |
---|
979 | * where f[i] denotes the coefficient to the power x^i of f. |
---|
980 | * |
---|
981 | * As usual, comparesame() returns 1 if CO is larger than c, 0 if |
---|
982 | * CO equals c, and -1 if CO is less than c. However, this |
---|
983 | * function is optimized to test on equality since this is its |
---|
984 | * most important and frequent usage. |
---|
985 | * |
---|
986 | * See the respective `CanonicalForm'-methods for an explanation |
---|
987 | * why we define such a strange (but total) ordering on |
---|
988 | * polynomials. |
---|
989 | * |
---|
990 | * @sa CanonicalForm::operator <(), CanonicalForm::operator ==() |
---|
991 | * |
---|
992 | **/ |
---|
993 | int |
---|
994 | InternalPoly::comparesame ( InternalCF * acoeff ) |
---|
995 | { |
---|
996 | ASSERT( ! ::is_imm( acoeff ) && acoeff->level() > LEVELBASE, "incompatible base coefficients" ); |
---|
997 | InternalPoly* apoly = (InternalPoly*)acoeff; |
---|
998 | // check on triviality |
---|
999 | if ( this == apoly ) |
---|
1000 | return 0; |
---|
1001 | else |
---|
1002 | { |
---|
1003 | termList cursor1 = firstTerm; |
---|
1004 | termList cursor2 = apoly->firstTerm; |
---|
1005 | for ( ; cursor1 && cursor2; cursor1 = cursor1->next, cursor2 = cursor2->next ) |
---|
1006 | // we test on inequality of coefficients at this |
---|
1007 | // point instead of testing on "less than" at the |
---|
1008 | // last `else' in the enclosed `if' statement since a |
---|
1009 | // test on inequaltiy in general is cheaper |
---|
1010 | if ( (cursor1->exp != cursor2->exp) || (cursor1->coeff != cursor2->coeff) ) |
---|
1011 | { |
---|
1012 | if ( cursor1->exp > cursor2->exp ) |
---|
1013 | return 1; |
---|
1014 | else if ( cursor1->exp < cursor2->exp ) |
---|
1015 | return -1; |
---|
1016 | else if ( cursor1->coeff > cursor2->coeff ) |
---|
1017 | return 1; |
---|
1018 | else |
---|
1019 | return -1; |
---|
1020 | } |
---|
1021 | // check trailing terms |
---|
1022 | if ( cursor1 == cursor2 ) |
---|
1023 | return 0; |
---|
1024 | else if ( cursor1 != 0 ) |
---|
1025 | return 1; |
---|
1026 | else |
---|
1027 | return -1; |
---|
1028 | } |
---|
1029 | } |
---|
1030 | |
---|
1031 | /** |
---|
1032 | * comparecoeff() always returns 1 since CO is defined to be |
---|
1033 | * larger than anything which is a coefficient w.r.t. CO. |
---|
1034 | **/ |
---|
1035 | int |
---|
1036 | InternalPoly::comparecoeff ( InternalCF * ) |
---|
1037 | { |
---|
1038 | return 1; |
---|
1039 | } |
---|
1040 | |
---|
1041 | InternalCF* |
---|
1042 | InternalPoly::addcoeff( InternalCF* cc ) |
---|
1043 | { |
---|
1044 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1045 | if ( c.isZero() ) |
---|
1046 | return this; |
---|
1047 | else |
---|
1048 | { |
---|
1049 | if ( getRefCount() <= 1 ) |
---|
1050 | { |
---|
1051 | if ( lastTerm->exp == 0 ) |
---|
1052 | { |
---|
1053 | lastTerm->coeff += c; |
---|
1054 | if ( lastTerm->coeff.isZero() ) |
---|
1055 | { |
---|
1056 | termList cursor = firstTerm; |
---|
1057 | while ( cursor->next != lastTerm ) |
---|
1058 | cursor = cursor->next; |
---|
1059 | delete lastTerm; |
---|
1060 | cursor->next = 0; |
---|
1061 | lastTerm = cursor; |
---|
1062 | } |
---|
1063 | } |
---|
1064 | else |
---|
1065 | { |
---|
1066 | lastTerm->next = new term( 0, c, 0 ); |
---|
1067 | lastTerm = lastTerm->next; |
---|
1068 | } |
---|
1069 | return this; |
---|
1070 | } |
---|
1071 | else |
---|
1072 | { |
---|
1073 | decRefCount(); |
---|
1074 | termList last, first = copyTermList( firstTerm, last, false ); |
---|
1075 | if ( last->exp == 0 ) |
---|
1076 | { |
---|
1077 | last->coeff += c; |
---|
1078 | if ( last->coeff.isZero() ) |
---|
1079 | { |
---|
1080 | termList cursor = first; |
---|
1081 | while ( cursor->next != last ) |
---|
1082 | cursor = cursor->next; |
---|
1083 | delete last; |
---|
1084 | cursor->next = 0; |
---|
1085 | last = cursor; |
---|
1086 | } |
---|
1087 | } |
---|
1088 | else |
---|
1089 | { |
---|
1090 | last->next = new term( 0, c, 0L ); |
---|
1091 | last = last->next; |
---|
1092 | } |
---|
1093 | return new InternalPoly( first, last, var ); |
---|
1094 | } |
---|
1095 | } |
---|
1096 | } |
---|
1097 | |
---|
1098 | InternalCF* |
---|
1099 | InternalPoly::subcoeff( InternalCF* cc, bool negate ) |
---|
1100 | { |
---|
1101 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1102 | if ( c.isZero() ) |
---|
1103 | if ( getRefCount() > 1 ) |
---|
1104 | { |
---|
1105 | decRefCount(); |
---|
1106 | termList last, first = copyTermList( firstTerm, last, negate ); |
---|
1107 | return new InternalPoly( first, last, var ); |
---|
1108 | } |
---|
1109 | else |
---|
1110 | { |
---|
1111 | if ( negate ) |
---|
1112 | negateTermList( firstTerm ); |
---|
1113 | return this; |
---|
1114 | } |
---|
1115 | else |
---|
1116 | { |
---|
1117 | if ( getRefCount() <= 1 ) |
---|
1118 | { |
---|
1119 | if ( lastTerm->exp == 0 ) |
---|
1120 | { |
---|
1121 | if ( negate ) |
---|
1122 | { |
---|
1123 | negateTermList( firstTerm ); |
---|
1124 | lastTerm->coeff += c; |
---|
1125 | } |
---|
1126 | else |
---|
1127 | lastTerm->coeff -= c; |
---|
1128 | if ( lastTerm->coeff.isZero() ) |
---|
1129 | { |
---|
1130 | termList cursor = firstTerm; |
---|
1131 | while ( cursor->next != lastTerm ) |
---|
1132 | cursor = cursor->next; |
---|
1133 | delete lastTerm; |
---|
1134 | cursor->next = 0; |
---|
1135 | lastTerm = cursor; |
---|
1136 | } |
---|
1137 | } |
---|
1138 | else |
---|
1139 | { |
---|
1140 | if ( negate ) |
---|
1141 | { |
---|
1142 | negateTermList( firstTerm ); |
---|
1143 | lastTerm->next = new term( 0, c, 0 ); |
---|
1144 | } |
---|
1145 | else |
---|
1146 | lastTerm->next = new term( 0, -c, 0 ); |
---|
1147 | lastTerm = lastTerm->next; |
---|
1148 | } |
---|
1149 | return this; |
---|
1150 | } |
---|
1151 | else |
---|
1152 | { |
---|
1153 | decRefCount(); |
---|
1154 | termList last, first = copyTermList( firstTerm, last, negate ); |
---|
1155 | if ( last->exp == 0 ) |
---|
1156 | { |
---|
1157 | if ( negate ) |
---|
1158 | last->coeff += c; |
---|
1159 | else |
---|
1160 | last->coeff -= c; |
---|
1161 | if ( last->coeff.isZero() ) |
---|
1162 | { |
---|
1163 | termList cursor = first; |
---|
1164 | while ( cursor->next != last ) |
---|
1165 | cursor = cursor->next; |
---|
1166 | delete last; |
---|
1167 | cursor->next = 0; |
---|
1168 | last = cursor; |
---|
1169 | } |
---|
1170 | } |
---|
1171 | else |
---|
1172 | { |
---|
1173 | if ( negate ) |
---|
1174 | last->next = new term( 0, c, 0 ); |
---|
1175 | else |
---|
1176 | last->next = new term( 0, -c, 0 ); |
---|
1177 | last = last->next; |
---|
1178 | } |
---|
1179 | return new InternalPoly( first, last, var ); |
---|
1180 | } |
---|
1181 | } |
---|
1182 | } |
---|
1183 | |
---|
1184 | InternalCF* |
---|
1185 | InternalPoly::mulcoeff( InternalCF* cc ) |
---|
1186 | { |
---|
1187 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1188 | if ( c.isZero() ) |
---|
1189 | { |
---|
1190 | if ( getRefCount() <= 1 ) |
---|
1191 | { |
---|
1192 | delete this; |
---|
1193 | return CFFactory::basic( 0L ); |
---|
1194 | } |
---|
1195 | else |
---|
1196 | { |
---|
1197 | decRefCount(); |
---|
1198 | return CFFactory::basic( 0L ); |
---|
1199 | } |
---|
1200 | } |
---|
1201 | else if ( c.isOne() ) |
---|
1202 | return this; |
---|
1203 | else |
---|
1204 | { |
---|
1205 | if ( getRefCount() <= 1 ) |
---|
1206 | { |
---|
1207 | mulTermList( firstTerm, c, 0L ); |
---|
1208 | return this; |
---|
1209 | } |
---|
1210 | else |
---|
1211 | { |
---|
1212 | decRefCount(); |
---|
1213 | termList last, first = copyTermList( firstTerm, last ); |
---|
1214 | mulTermList( first, c, 0 ); |
---|
1215 | return new InternalPoly( first, last, var ); |
---|
1216 | } |
---|
1217 | } |
---|
1218 | } |
---|
1219 | |
---|
1220 | InternalCF* |
---|
1221 | InternalPoly::dividecoeff( InternalCF* cc, bool invert ) |
---|
1222 | { |
---|
1223 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1224 | if ( inExtension() && getReduce( var ) && invert ) |
---|
1225 | { |
---|
1226 | InternalCF * dummy; |
---|
1227 | dummy = this->invert(); |
---|
1228 | if (is_imm(dummy)) |
---|
1229 | { |
---|
1230 | if (is_imm(cc)) |
---|
1231 | { |
---|
1232 | InternalInteger *d=new InternalInteger(imm2int(dummy)*imm2int(cc)); |
---|
1233 | dummy=d; |
---|
1234 | } |
---|
1235 | else |
---|
1236 | dummy=cc->mulcoeff(dummy); |
---|
1237 | } |
---|
1238 | else dummy = dummy->mulcoeff( cc ); |
---|
1239 | if ( getRefCount() <= 1 ) |
---|
1240 | { |
---|
1241 | delete this; |
---|
1242 | return dummy; |
---|
1243 | } |
---|
1244 | else |
---|
1245 | { |
---|
1246 | decRefCount(); |
---|
1247 | return dummy; |
---|
1248 | } |
---|
1249 | } |
---|
1250 | if ( invert ) |
---|
1251 | { |
---|
1252 | if ( getRefCount() <= 1 ) |
---|
1253 | { |
---|
1254 | delete this; |
---|
1255 | return CFFactory::basic( 0L ); |
---|
1256 | } |
---|
1257 | else |
---|
1258 | { |
---|
1259 | decRefCount(); |
---|
1260 | return CFFactory::basic( 0L ); |
---|
1261 | } |
---|
1262 | } |
---|
1263 | if ( c.isOne() ) |
---|
1264 | return this; |
---|
1265 | else |
---|
1266 | { |
---|
1267 | if ( getRefCount() <= 1 ) |
---|
1268 | { |
---|
1269 | firstTerm = divideTermList( firstTerm, c, lastTerm ); |
---|
1270 | if ( firstTerm && firstTerm->exp != 0 ) |
---|
1271 | return this; |
---|
1272 | else if ( firstTerm ) |
---|
1273 | { |
---|
1274 | InternalCF * res = firstTerm->coeff.getval(); |
---|
1275 | delete this; |
---|
1276 | return res; |
---|
1277 | } |
---|
1278 | else |
---|
1279 | { |
---|
1280 | delete this; |
---|
1281 | return CFFactory::basic( 0L ); |
---|
1282 | } |
---|
1283 | } |
---|
1284 | else |
---|
1285 | { |
---|
1286 | decRefCount(); |
---|
1287 | termList last, first = copyTermList( firstTerm, last ); |
---|
1288 | first = divideTermList( first, c, last ); |
---|
1289 | if ( first && first->exp != 0 ) |
---|
1290 | return new InternalPoly( first, last, var ); |
---|
1291 | else if ( first ) |
---|
1292 | { |
---|
1293 | InternalCF * res = first->coeff.getval(); |
---|
1294 | delete first; |
---|
1295 | return res; |
---|
1296 | } |
---|
1297 | else |
---|
1298 | { |
---|
1299 | delete first; |
---|
1300 | return CFFactory::basic( 0L ); |
---|
1301 | } |
---|
1302 | } |
---|
1303 | } |
---|
1304 | } |
---|
1305 | |
---|
1306 | InternalCF* |
---|
1307 | InternalPoly::tryDividecoeff( InternalCF* cc, bool invert, const CanonicalForm& M, bool& fail ) |
---|
1308 | { |
---|
1309 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1310 | if ( inExtension() && !getReduce( var ) && invert ) |
---|
1311 | { |
---|
1312 | InternalCF * dummy; |
---|
1313 | dummy = this->tryInvert(M, fail); |
---|
1314 | if (fail) |
---|
1315 | { |
---|
1316 | if (getRefCount() <= 1) |
---|
1317 | delete this; |
---|
1318 | else |
---|
1319 | decRefCount(); |
---|
1320 | return dummy; //is equal to CFFactory::basic ( 0L ) in this case |
---|
1321 | } |
---|
1322 | if (is_imm(dummy)) |
---|
1323 | { |
---|
1324 | if (is_imm(cc)) |
---|
1325 | { |
---|
1326 | InternalInteger *d=new InternalInteger(imm2int(dummy)*imm2int(cc)); |
---|
1327 | dummy=d; |
---|
1328 | } |
---|
1329 | else |
---|
1330 | dummy=cc->mulcoeff(dummy); |
---|
1331 | } |
---|
1332 | else dummy = dummy->mulcoeff( cc ); |
---|
1333 | if ( getRefCount() <= 1 ) |
---|
1334 | { |
---|
1335 | delete this; |
---|
1336 | return dummy; |
---|
1337 | } |
---|
1338 | else |
---|
1339 | { |
---|
1340 | decRefCount(); |
---|
1341 | return dummy; |
---|
1342 | } |
---|
1343 | } |
---|
1344 | if ( invert ) |
---|
1345 | { |
---|
1346 | if ( getRefCount() <= 1 ) |
---|
1347 | { |
---|
1348 | delete this; |
---|
1349 | return CFFactory::basic( 0L ); |
---|
1350 | } |
---|
1351 | else |
---|
1352 | { |
---|
1353 | decRefCount(); |
---|
1354 | return CFFactory::basic( 0L ); |
---|
1355 | } |
---|
1356 | } |
---|
1357 | if ( c.isOne() ) |
---|
1358 | return this; |
---|
1359 | //one should never get here |
---|
1360 | else |
---|
1361 | { |
---|
1362 | if ( getRefCount() <= 1 ) |
---|
1363 | { |
---|
1364 | firstTerm = divideTermList( firstTerm, c, lastTerm ); |
---|
1365 | if ( firstTerm && firstTerm->exp != 0 ) |
---|
1366 | return this; |
---|
1367 | else if ( firstTerm ) |
---|
1368 | { |
---|
1369 | InternalCF * res = firstTerm->coeff.getval(); |
---|
1370 | delete this; |
---|
1371 | return res; |
---|
1372 | } |
---|
1373 | else |
---|
1374 | { |
---|
1375 | delete this; |
---|
1376 | return CFFactory::basic( 0L ); |
---|
1377 | } |
---|
1378 | } |
---|
1379 | else |
---|
1380 | { |
---|
1381 | decRefCount(); |
---|
1382 | termList last, first = copyTermList( firstTerm, last ); |
---|
1383 | first = divideTermList( first, c, last ); |
---|
1384 | if ( first && first->exp != 0 ) |
---|
1385 | return new InternalPoly( first, last, var ); |
---|
1386 | else if ( first ) |
---|
1387 | { |
---|
1388 | InternalCF * res = first->coeff.getval(); |
---|
1389 | delete first; |
---|
1390 | return res; |
---|
1391 | } |
---|
1392 | else |
---|
1393 | { |
---|
1394 | delete first; |
---|
1395 | return CFFactory::basic( 0L ); |
---|
1396 | } |
---|
1397 | } |
---|
1398 | } |
---|
1399 | } |
---|
1400 | |
---|
1401 | |
---|
1402 | InternalCF* |
---|
1403 | InternalPoly::divcoeff( InternalCF* cc, bool invert ) |
---|
1404 | { |
---|
1405 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1406 | if ( inExtension() && getReduce( var ) && invert ) |
---|
1407 | { |
---|
1408 | InternalCF * dummy; |
---|
1409 | dummy = this->invert(); |
---|
1410 | dummy = dummy->mulcoeff( cc ); |
---|
1411 | if ( getRefCount() <= 1 ) |
---|
1412 | { |
---|
1413 | delete this; |
---|
1414 | return dummy; |
---|
1415 | } |
---|
1416 | else |
---|
1417 | { |
---|
1418 | decRefCount(); |
---|
1419 | return dummy; |
---|
1420 | } |
---|
1421 | } |
---|
1422 | if ( invert ) |
---|
1423 | { |
---|
1424 | if ( getRefCount() <= 1 ) |
---|
1425 | { |
---|
1426 | delete this; |
---|
1427 | return CFFactory::basic( 0L ); |
---|
1428 | } |
---|
1429 | else |
---|
1430 | { |
---|
1431 | decRefCount(); |
---|
1432 | return CFFactory::basic( 0L ); |
---|
1433 | } |
---|
1434 | } |
---|
1435 | if ( c.isOne() ) |
---|
1436 | return this; |
---|
1437 | else |
---|
1438 | { |
---|
1439 | if ( getRefCount() <= 1 ) |
---|
1440 | { |
---|
1441 | firstTerm = divTermList( firstTerm, c, lastTerm ); |
---|
1442 | if ( firstTerm && firstTerm->exp != 0 ) |
---|
1443 | return this; |
---|
1444 | else if ( firstTerm ) |
---|
1445 | { |
---|
1446 | InternalCF * res = firstTerm->coeff.getval(); |
---|
1447 | delete this; |
---|
1448 | return res; |
---|
1449 | } |
---|
1450 | else |
---|
1451 | { |
---|
1452 | delete this; |
---|
1453 | return CFFactory::basic( 0L ); |
---|
1454 | } |
---|
1455 | } |
---|
1456 | else |
---|
1457 | { |
---|
1458 | decRefCount(); |
---|
1459 | termList last, first = copyTermList( firstTerm, last ); |
---|
1460 | first = divTermList( first, c, last ); |
---|
1461 | if ( first && first->exp != 0 ) |
---|
1462 | return new InternalPoly( first, last, var ); |
---|
1463 | else if ( first ) |
---|
1464 | { |
---|
1465 | InternalCF * res = first->coeff.getval(); |
---|
1466 | delete first; |
---|
1467 | return res; |
---|
1468 | } |
---|
1469 | else |
---|
1470 | { |
---|
1471 | delete first; |
---|
1472 | return CFFactory::basic( 0L ); |
---|
1473 | } |
---|
1474 | } |
---|
1475 | } |
---|
1476 | } |
---|
1477 | |
---|
1478 | InternalCF* |
---|
1479 | InternalPoly::tryDivcoeff( InternalCF* cc, bool invert, const CanonicalForm& M, bool& fail ) |
---|
1480 | { |
---|
1481 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1482 | if ( inExtension() && !getReduce( var ) && invert ) |
---|
1483 | { |
---|
1484 | InternalCF * dummy; |
---|
1485 | dummy = this->tryInvert(M, fail); |
---|
1486 | if (fail) |
---|
1487 | { |
---|
1488 | if (getRefCount() <= 1) |
---|
1489 | delete this; |
---|
1490 | else |
---|
1491 | decRefCount(); |
---|
1492 | return dummy; |
---|
1493 | } |
---|
1494 | dummy = dummy->mulcoeff( cc ); |
---|
1495 | if ( getRefCount() <= 1 ) |
---|
1496 | { |
---|
1497 | delete this; |
---|
1498 | return dummy; |
---|
1499 | } |
---|
1500 | else |
---|
1501 | { |
---|
1502 | decRefCount(); |
---|
1503 | return dummy; |
---|
1504 | } |
---|
1505 | } |
---|
1506 | if ( invert ) |
---|
1507 | { |
---|
1508 | if ( getRefCount() <= 1 ) |
---|
1509 | { |
---|
1510 | delete this; |
---|
1511 | return CFFactory::basic( 0L ); |
---|
1512 | } |
---|
1513 | else |
---|
1514 | { |
---|
1515 | decRefCount(); |
---|
1516 | return CFFactory::basic( 0L ); |
---|
1517 | } |
---|
1518 | } |
---|
1519 | if ( c.isOne() ) |
---|
1520 | return this; |
---|
1521 | else |
---|
1522 | { |
---|
1523 | if ( getRefCount() <= 1 ) |
---|
1524 | { |
---|
1525 | firstTerm = tryDivTermList( firstTerm, c, lastTerm, M, fail ); |
---|
1526 | if (fail) |
---|
1527 | { |
---|
1528 | delete this; |
---|
1529 | return CFFactory::basic (0L); |
---|
1530 | } |
---|
1531 | if ( firstTerm && firstTerm->exp != 0 ) |
---|
1532 | return this; |
---|
1533 | else if ( firstTerm ) |
---|
1534 | { |
---|
1535 | InternalCF * res = firstTerm->coeff.getval(); |
---|
1536 | delete this; |
---|
1537 | return res; |
---|
1538 | } |
---|
1539 | else |
---|
1540 | { |
---|
1541 | delete this; |
---|
1542 | return CFFactory::basic( 0L ); |
---|
1543 | } |
---|
1544 | } |
---|
1545 | else |
---|
1546 | { |
---|
1547 | decRefCount(); |
---|
1548 | termList last, first = copyTermList( firstTerm, last ); |
---|
1549 | first = tryDivTermList( first, c, last, M, fail ); |
---|
1550 | if (fail) |
---|
1551 | { |
---|
1552 | delete this; |
---|
1553 | return CFFactory::basic (0L); |
---|
1554 | } |
---|
1555 | if (fail) |
---|
1556 | { |
---|
1557 | delete first; |
---|
1558 | return CFFactory::basic (0L); |
---|
1559 | } |
---|
1560 | if ( first && first->exp != 0 ) |
---|
1561 | return new InternalPoly( first, last, var ); |
---|
1562 | else if ( first ) |
---|
1563 | { |
---|
1564 | InternalCF * res = first->coeff.getval(); |
---|
1565 | delete first; |
---|
1566 | return res; |
---|
1567 | } |
---|
1568 | else |
---|
1569 | { |
---|
1570 | delete first; |
---|
1571 | return CFFactory::basic( 0L ); |
---|
1572 | } |
---|
1573 | } |
---|
1574 | } |
---|
1575 | } |
---|
1576 | |
---|
1577 | InternalCF* |
---|
1578 | InternalPoly::modulocoeff( InternalCF* cc, bool invert ) |
---|
1579 | { |
---|
1580 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1581 | if ( invert ) |
---|
1582 | { |
---|
1583 | if ( deleteObject() ) delete this; |
---|
1584 | return c.getval(); |
---|
1585 | } |
---|
1586 | ASSERT( ! c.isZero(), "divide by zero!" ); |
---|
1587 | if ( deleteObject() ) delete this; |
---|
1588 | return CFFactory::basic( 0L ); |
---|
1589 | } |
---|
1590 | |
---|
1591 | InternalCF* |
---|
1592 | InternalPoly::modcoeff( InternalCF* cc, bool invert ) |
---|
1593 | { |
---|
1594 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1595 | if ( invert ) |
---|
1596 | { |
---|
1597 | if ( deleteObject() ) delete this; |
---|
1598 | return c.getval(); |
---|
1599 | } |
---|
1600 | ASSERT( ! c.isZero(), "divide by zero!" ); |
---|
1601 | if ( c.isOne() ) |
---|
1602 | { |
---|
1603 | if ( getRefCount() <= 1 ) |
---|
1604 | { |
---|
1605 | delete this; |
---|
1606 | return CFFactory::basic( 0L ); |
---|
1607 | } |
---|
1608 | else |
---|
1609 | { |
---|
1610 | decRefCount(); |
---|
1611 | return CFFactory::basic( 0L ); |
---|
1612 | } |
---|
1613 | } |
---|
1614 | else |
---|
1615 | { |
---|
1616 | if ( getRefCount() <= 1 ) |
---|
1617 | { |
---|
1618 | firstTerm = modTermList( firstTerm, c, lastTerm ); |
---|
1619 | if ( firstTerm && firstTerm->exp != 0 ) |
---|
1620 | return this; |
---|
1621 | else if ( firstTerm ) |
---|
1622 | { |
---|
1623 | InternalCF * res = firstTerm->coeff.getval(); |
---|
1624 | delete this; |
---|
1625 | return res; |
---|
1626 | } |
---|
1627 | else |
---|
1628 | { |
---|
1629 | delete this; |
---|
1630 | return CFFactory::basic( 0L ); |
---|
1631 | } |
---|
1632 | } |
---|
1633 | else |
---|
1634 | { |
---|
1635 | decRefCount(); |
---|
1636 | termList last, first = copyTermList( firstTerm, last ); |
---|
1637 | first = modTermList( first, c, last ); |
---|
1638 | if ( first && first->exp != 0 ) |
---|
1639 | return new InternalPoly( first, last, var ); |
---|
1640 | else if ( first ) |
---|
1641 | { |
---|
1642 | InternalCF * res = first->coeff.getval(); |
---|
1643 | delete first; |
---|
1644 | return res; |
---|
1645 | } |
---|
1646 | else |
---|
1647 | { |
---|
1648 | delete first; |
---|
1649 | return CFFactory::basic( 0L ); |
---|
1650 | } |
---|
1651 | } |
---|
1652 | } |
---|
1653 | } |
---|
1654 | |
---|
1655 | void |
---|
1656 | InternalPoly::divremcoeff( InternalCF* cc, InternalCF*& quot, InternalCF*& rem, bool invert ) |
---|
1657 | { |
---|
1658 | if ( inExtension() && getReduce( var ) ) |
---|
1659 | { |
---|
1660 | quot = copyObject(); |
---|
1661 | quot = quot->dividecoeff( cc, invert ); |
---|
1662 | rem = CFFactory::basic( 0L ); |
---|
1663 | } |
---|
1664 | else if ( invert ) |
---|
1665 | { |
---|
1666 | if ( is_imm( cc ) ) |
---|
1667 | rem = cc; |
---|
1668 | else |
---|
1669 | rem = cc->copyObject(); |
---|
1670 | quot = CFFactory::basic( 0L ); |
---|
1671 | } |
---|
1672 | else |
---|
1673 | { |
---|
1674 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1675 | ASSERT( ! c.isZero(), "divide by zero!" ); |
---|
1676 | termList quotlast, quotfirst = copyTermList( firstTerm, quotlast ); |
---|
1677 | quotfirst = divideTermList( quotfirst, c, quotlast ); |
---|
1678 | if ( quotfirst ) |
---|
1679 | if ( quotfirst->exp == 0 ) |
---|
1680 | { |
---|
1681 | quot = quotfirst->coeff.getval(); |
---|
1682 | delete quotfirst; |
---|
1683 | } |
---|
1684 | else |
---|
1685 | quot = new InternalPoly( quotfirst, quotlast, var ); |
---|
1686 | else |
---|
1687 | quot = CFFactory::basic( 0L ); |
---|
1688 | rem = CFFactory::basic( 0L ); |
---|
1689 | } |
---|
1690 | } |
---|
1691 | |
---|
1692 | bool |
---|
1693 | InternalPoly::divremcoefft( InternalCF* cc, InternalCF*& quot, InternalCF*& rem, bool invert ) |
---|
1694 | { |
---|
1695 | if ( inExtension() && getReduce( var ) ) |
---|
1696 | { |
---|
1697 | quot = copyObject(); |
---|
1698 | quot = quot->dividecoeff( cc, invert ); |
---|
1699 | rem = CFFactory::basic( 0L ); |
---|
1700 | return true; |
---|
1701 | } |
---|
1702 | else if ( invert ) |
---|
1703 | { |
---|
1704 | if ( is_imm( cc ) ) |
---|
1705 | rem = cc; |
---|
1706 | else |
---|
1707 | rem = cc->copyObject(); |
---|
1708 | quot = CFFactory::basic( 0L ); |
---|
1709 | return true; |
---|
1710 | } |
---|
1711 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1712 | ASSERT( ! c.isZero(), "divide by zero!" ); |
---|
1713 | termList quotfirst, quotcursor; |
---|
1714 | termList cursor; |
---|
1715 | CanonicalForm cquot, crem; |
---|
1716 | bool divideok = true; |
---|
1717 | |
---|
1718 | cursor = firstTerm; |
---|
1719 | quotcursor = quotfirst = new term; |
---|
1720 | |
---|
1721 | while ( cursor && divideok ) |
---|
1722 | { |
---|
1723 | divideok = divremt( cursor->coeff, c, cquot, crem ); |
---|
1724 | divideok = divideok && crem.isZero(); |
---|
1725 | if ( divideok ) |
---|
1726 | { |
---|
1727 | if ( ! cquot.isZero() ) |
---|
1728 | { |
---|
1729 | quotcursor->next = new term( 0, cquot, cursor->exp ); |
---|
1730 | quotcursor = quotcursor->next; |
---|
1731 | } |
---|
1732 | cursor = cursor->next; |
---|
1733 | } |
---|
1734 | } |
---|
1735 | quotcursor->next = 0; |
---|
1736 | if ( divideok ) |
---|
1737 | { |
---|
1738 | cursor = quotfirst; quotfirst = quotfirst->next; delete cursor; |
---|
1739 | if ( quotfirst ) |
---|
1740 | if ( quotfirst->exp == 0 ) |
---|
1741 | { |
---|
1742 | quot = quotfirst->coeff.getval(); |
---|
1743 | delete quotfirst; |
---|
1744 | } |
---|
1745 | else |
---|
1746 | quot = new InternalPoly( quotfirst, quotcursor, var ); |
---|
1747 | else |
---|
1748 | quot = CFFactory::basic( 0L ); |
---|
1749 | rem = CFFactory::basic( 0L ); |
---|
1750 | } |
---|
1751 | else |
---|
1752 | { |
---|
1753 | freeTermList( quotfirst ); |
---|
1754 | } |
---|
1755 | return divideok; |
---|
1756 | } |
---|
1757 | |
---|
1758 | bool |
---|
1759 | InternalPoly::tryDivremcoefft( InternalCF* cc, InternalCF*& quot, InternalCF*& rem, bool invert, const CanonicalForm& M, bool& fail ) |
---|
1760 | { |
---|
1761 | if ( inExtension() && !getReduce( var ) ) |
---|
1762 | { |
---|
1763 | quot = copyObject(); |
---|
1764 | quot = quot->tryDividecoeff( cc, invert, M, fail ); |
---|
1765 | if (fail) |
---|
1766 | return false; |
---|
1767 | rem = CFFactory::basic( 0L ); |
---|
1768 | return true; |
---|
1769 | } |
---|
1770 | else if ( invert ) |
---|
1771 | { |
---|
1772 | if ( is_imm( cc ) ) |
---|
1773 | rem = cc; |
---|
1774 | else |
---|
1775 | rem = cc->copyObject(); |
---|
1776 | quot = CFFactory::basic( 0L ); |
---|
1777 | return true; |
---|
1778 | } |
---|
1779 | CanonicalForm c( is_imm(cc) ? cc : cc->copyObject() ); |
---|
1780 | ASSERT( ! c.isZero(), "divide by zero!" ); |
---|
1781 | termList quotfirst, quotcursor; |
---|
1782 | termList cursor; |
---|
1783 | CanonicalForm cquot, crem; |
---|
1784 | bool divideok = true; |
---|
1785 | |
---|
1786 | cursor = firstTerm; |
---|
1787 | quotcursor = quotfirst = new term; |
---|
1788 | |
---|
1789 | while ( cursor && divideok ) |
---|
1790 | { |
---|
1791 | divideok = tryDivremt( cursor->coeff, c, cquot, crem, M, fail ); |
---|
1792 | if (fail) |
---|
1793 | { |
---|
1794 | freeTermList (quotfirst); |
---|
1795 | return false; |
---|
1796 | } |
---|
1797 | divideok = divideok && crem.isZero(); |
---|
1798 | if ( divideok ) |
---|
1799 | { |
---|
1800 | if ( ! cquot.isZero() ) |
---|
1801 | { |
---|
1802 | quotcursor->next = new term( 0, cquot, cursor->exp ); |
---|
1803 | quotcursor = quotcursor->next; |
---|
1804 | } |
---|
1805 | cursor = cursor->next; |
---|
1806 | } |
---|
1807 | } |
---|
1808 | quotcursor->next = 0; |
---|
1809 | if ( divideok ) |
---|
1810 | { |
---|
1811 | cursor = quotfirst; quotfirst = quotfirst->next; delete cursor; |
---|
1812 | if ( quotfirst ) |
---|
1813 | if ( quotfirst->exp == 0 ) |
---|
1814 | { |
---|
1815 | quot = quotfirst->coeff.getval(); |
---|
1816 | delete quotfirst; |
---|
1817 | } |
---|
1818 | else |
---|
1819 | quot = new InternalPoly( quotfirst, quotcursor, var ); |
---|
1820 | else |
---|
1821 | quot = CFFactory::basic( 0L ); |
---|
1822 | rem = CFFactory::basic( 0L ); |
---|
1823 | } |
---|
1824 | else |
---|
1825 | { |
---|
1826 | freeTermList( quotfirst ); |
---|
1827 | } |
---|
1828 | return divideok; |
---|
1829 | } |
---|
1830 | |
---|
1831 | // static functions |
---|
1832 | |
---|
1833 | termList |
---|
1834 | InternalPoly::copyTermList ( termList aTermList, termList& theLastTerm, bool negate ) |
---|
1835 | { |
---|
1836 | if ( aTermList == 0 ) |
---|
1837 | return 0; |
---|
1838 | else if ( negate ) |
---|
1839 | { |
---|
1840 | termList sourceCursor = aTermList; |
---|
1841 | termList dummy = new term; |
---|
1842 | termList targetCursor = dummy; |
---|
1843 | |
---|
1844 | while ( sourceCursor ) |
---|
1845 | { |
---|
1846 | targetCursor->next = new term( 0, -sourceCursor->coeff, sourceCursor->exp ); |
---|
1847 | targetCursor = targetCursor->next; |
---|
1848 | sourceCursor = sourceCursor->next; |
---|
1849 | } |
---|
1850 | targetCursor->next = 0; |
---|
1851 | theLastTerm = targetCursor; |
---|
1852 | targetCursor = dummy->next; |
---|
1853 | delete dummy; |
---|
1854 | return targetCursor; |
---|
1855 | } |
---|
1856 | else |
---|
1857 | { |
---|
1858 | termList sourceCursor = aTermList; |
---|
1859 | termList dummy = new term; |
---|
1860 | termList targetCursor = dummy; |
---|
1861 | |
---|
1862 | while ( sourceCursor ) |
---|
1863 | { |
---|
1864 | targetCursor->next = new term( 0, sourceCursor->coeff, sourceCursor->exp ); |
---|
1865 | targetCursor = targetCursor->next; |
---|
1866 | sourceCursor = sourceCursor->next; |
---|
1867 | } |
---|
1868 | targetCursor->next = 0; |
---|
1869 | theLastTerm = targetCursor; |
---|
1870 | targetCursor = dummy->next; |
---|
1871 | delete dummy; |
---|
1872 | return targetCursor; |
---|
1873 | } |
---|
1874 | } |
---|
1875 | |
---|
1876 | termList |
---|
1877 | InternalPoly::deepCopyTermList ( termList aTermList, termList& theLastTerm ) |
---|
1878 | { |
---|
1879 | if ( aTermList == 0 ) |
---|
1880 | return 0; |
---|
1881 | else |
---|
1882 | { |
---|
1883 | termList sourceCursor = aTermList; |
---|
1884 | termList dummy = new term; |
---|
1885 | termList targetCursor = dummy; |
---|
1886 | |
---|
1887 | while ( sourceCursor ) |
---|
1888 | { |
---|
1889 | targetCursor->next = new term( 0, sourceCursor->coeff.deepCopy(), sourceCursor->exp ); |
---|
1890 | targetCursor = targetCursor->next; |
---|
1891 | sourceCursor = sourceCursor->next; |
---|
1892 | } |
---|
1893 | targetCursor->next = 0; |
---|
1894 | theLastTerm = targetCursor; |
---|
1895 | targetCursor = dummy->next; |
---|
1896 | delete dummy; |
---|
1897 | return targetCursor; |
---|
1898 | } |
---|
1899 | } |
---|
1900 | |
---|
1901 | void |
---|
1902 | InternalPoly::freeTermList ( termList aTermList ) |
---|
1903 | { |
---|
1904 | termList cursor = aTermList; |
---|
1905 | |
---|
1906 | while ( cursor ) |
---|
1907 | { |
---|
1908 | cursor = cursor->next; |
---|
1909 | delete aTermList; |
---|
1910 | aTermList = cursor; |
---|
1911 | } |
---|
1912 | } |
---|
1913 | |
---|
1914 | void |
---|
1915 | InternalPoly::negateTermList ( termList terms ) |
---|
1916 | { |
---|
1917 | termList cursor = terms; |
---|
1918 | while ( cursor ) |
---|
1919 | { |
---|
1920 | cursor->coeff = -cursor->coeff; |
---|
1921 | cursor = cursor->next; |
---|
1922 | } |
---|
1923 | } |
---|
1924 | |
---|
1925 | termList |
---|
1926 | InternalPoly::addTermList ( termList theList, termList aList, termList& lastTerm, bool negate ) |
---|
1927 | { |
---|
1928 | termList theCursor = theList; |
---|
1929 | termList aCursor = aList; |
---|
1930 | termList predCursor = 0; |
---|
1931 | |
---|
1932 | while ( theCursor && aCursor ) |
---|
1933 | { |
---|
1934 | if ( theCursor->exp == aCursor->exp ) |
---|
1935 | { |
---|
1936 | if ( negate ) |
---|
1937 | theCursor->coeff -= aCursor->coeff; |
---|
1938 | else |
---|
1939 | theCursor->coeff += aCursor->coeff; |
---|
1940 | if ( theCursor->coeff.isZero() ) |
---|
1941 | { |
---|
1942 | if ( predCursor ) |
---|
1943 | { |
---|
1944 | predCursor->next = theCursor->next; |
---|
1945 | delete theCursor; |
---|
1946 | theCursor = predCursor->next; |
---|
1947 | } |
---|
1948 | else |
---|
1949 | { |
---|
1950 | theList = theList->next; |
---|
1951 | delete theCursor; |
---|
1952 | theCursor = theList; |
---|
1953 | } |
---|
1954 | } |
---|
1955 | else |
---|
1956 | { |
---|
1957 | predCursor = theCursor; |
---|
1958 | theCursor = theCursor->next; |
---|
1959 | } |
---|
1960 | aCursor = aCursor->next; |
---|
1961 | } |
---|
1962 | else if ( theCursor->exp < aCursor->exp ) |
---|
1963 | { |
---|
1964 | if ( negate ) |
---|
1965 | if ( predCursor ) |
---|
1966 | { |
---|
1967 | predCursor->next = new term( theCursor, -aCursor->coeff, aCursor->exp ); |
---|
1968 | predCursor = predCursor->next; |
---|
1969 | } |
---|
1970 | else |
---|
1971 | { |
---|
1972 | theList = new term( theCursor, -aCursor->coeff, aCursor->exp ); |
---|
1973 | predCursor = theList; |
---|
1974 | } |
---|
1975 | else |
---|
1976 | if ( predCursor ) |
---|
1977 | { |
---|
1978 | predCursor->next = new term( theCursor, aCursor->coeff, aCursor->exp ); |
---|
1979 | predCursor = predCursor->next; |
---|
1980 | } |
---|
1981 | else |
---|
1982 | { |
---|
1983 | theList = new term( theCursor, aCursor->coeff, aCursor->exp ); |
---|
1984 | predCursor = theList; |
---|
1985 | } |
---|
1986 | aCursor = aCursor->next; |
---|
1987 | } |
---|
1988 | else |
---|
1989 | { |
---|
1990 | predCursor = theCursor; |
---|
1991 | theCursor = theCursor->next; |
---|
1992 | } |
---|
1993 | } |
---|
1994 | if ( aCursor ) |
---|
1995 | { |
---|
1996 | if ( predCursor ) |
---|
1997 | predCursor->next = copyTermList( aCursor, lastTerm, negate ); |
---|
1998 | else |
---|
1999 | theList = copyTermList( aCursor, lastTerm, negate ); |
---|
2000 | } |
---|
2001 | else if ( ! theCursor ) |
---|
2002 | lastTerm = predCursor; |
---|
2003 | |
---|
2004 | return theList; |
---|
2005 | } |
---|
2006 | |
---|
2007 | void |
---|
2008 | InternalPoly::mulTermList ( termList theCursor, const CanonicalForm& coeff, const int exp ) |
---|
2009 | { |
---|
2010 | while ( theCursor ) |
---|
2011 | { |
---|
2012 | theCursor->coeff *= coeff; |
---|
2013 | theCursor->exp += exp; |
---|
2014 | theCursor = theCursor->next; |
---|
2015 | } |
---|
2016 | } |
---|
2017 | |
---|
2018 | termList |
---|
2019 | InternalPoly::divideTermList ( termList firstTerm, const CanonicalForm& coeff, termList& lastTerm ) |
---|
2020 | { |
---|
2021 | termList theCursor = firstTerm; |
---|
2022 | lastTerm = 0; |
---|
2023 | termList dummy; |
---|
2024 | |
---|
2025 | while ( theCursor ) |
---|
2026 | { |
---|
2027 | theCursor->coeff /= coeff; |
---|
2028 | if ( theCursor->coeff.isZero() ) |
---|
2029 | { |
---|
2030 | if ( theCursor == firstTerm ) |
---|
2031 | firstTerm = theCursor->next; |
---|
2032 | else |
---|
2033 | lastTerm->next = theCursor->next; |
---|
2034 | dummy = theCursor; |
---|
2035 | theCursor = theCursor->next; |
---|
2036 | delete dummy; |
---|
2037 | } |
---|
2038 | else |
---|
2039 | { |
---|
2040 | lastTerm = theCursor; |
---|
2041 | theCursor = theCursor->next; |
---|
2042 | } |
---|
2043 | } |
---|
2044 | return firstTerm; |
---|
2045 | } |
---|
2046 | |
---|
2047 | termList |
---|
2048 | InternalPoly::divTermList ( termList firstTerm, const CanonicalForm& coeff, termList& lastTerm ) |
---|
2049 | { |
---|
2050 | termList theCursor = firstTerm; |
---|
2051 | lastTerm = 0; |
---|
2052 | termList dummy; |
---|
2053 | |
---|
2054 | while ( theCursor ) |
---|
2055 | { |
---|
2056 | theCursor->coeff.div( coeff ); |
---|
2057 | if ( theCursor->coeff.isZero() ) |
---|
2058 | { |
---|
2059 | if ( theCursor == firstTerm ) |
---|
2060 | firstTerm = theCursor->next; |
---|
2061 | else |
---|
2062 | lastTerm->next = theCursor->next; |
---|
2063 | dummy = theCursor; |
---|
2064 | theCursor = theCursor->next; |
---|
2065 | delete dummy; |
---|
2066 | } |
---|
2067 | else |
---|
2068 | { |
---|
2069 | lastTerm = theCursor; |
---|
2070 | theCursor = theCursor->next; |
---|
2071 | } |
---|
2072 | } |
---|
2073 | return firstTerm; |
---|
2074 | } |
---|
2075 | |
---|
2076 | termList |
---|
2077 | InternalPoly::tryDivTermList ( termList firstTerm, const CanonicalForm& coeff, termList& lastTerm, const CanonicalForm& M, bool& fail ) |
---|
2078 | { |
---|
2079 | termList theCursor = firstTerm; |
---|
2080 | lastTerm = 0; |
---|
2081 | termList dummy; |
---|
2082 | |
---|
2083 | while ( theCursor ) |
---|
2084 | { |
---|
2085 | theCursor->coeff.tryDiv( coeff, M, fail ); |
---|
2086 | if (fail) |
---|
2087 | return 0; |
---|
2088 | if ( theCursor->coeff.isZero() ) |
---|
2089 | { |
---|
2090 | if ( theCursor == firstTerm ) |
---|
2091 | firstTerm = theCursor->next; |
---|
2092 | else |
---|
2093 | lastTerm->next = theCursor->next; |
---|
2094 | dummy = theCursor; |
---|
2095 | theCursor = theCursor->next; |
---|
2096 | delete dummy; |
---|
2097 | } |
---|
2098 | else |
---|
2099 | { |
---|
2100 | lastTerm = theCursor; |
---|
2101 | theCursor = theCursor->next; |
---|
2102 | } |
---|
2103 | } |
---|
2104 | return firstTerm; |
---|
2105 | } |
---|
2106 | |
---|
2107 | termList |
---|
2108 | InternalPoly::modTermList ( termList firstTerm, const CanonicalForm& coeff, termList& lastTerm ) |
---|
2109 | { |
---|
2110 | termList theCursor = firstTerm; |
---|
2111 | lastTerm = 0; |
---|
2112 | termList dummy; |
---|
2113 | |
---|
2114 | while ( theCursor ) |
---|
2115 | { |
---|
2116 | theCursor->coeff.mod( coeff ); |
---|
2117 | if ( theCursor->coeff.isZero() ) |
---|
2118 | { |
---|
2119 | if ( theCursor == firstTerm ) |
---|
2120 | firstTerm = theCursor->next; |
---|
2121 | else |
---|
2122 | lastTerm->next = theCursor->next; |
---|
2123 | dummy = theCursor; |
---|
2124 | theCursor = theCursor-> next; |
---|
2125 | delete dummy; |
---|
2126 | } |
---|
2127 | else |
---|
2128 | { |
---|
2129 | lastTerm = theCursor; |
---|
2130 | theCursor = theCursor->next; |
---|
2131 | } |
---|
2132 | } |
---|
2133 | return firstTerm; |
---|
2134 | } |
---|
2135 | |
---|
2136 | void |
---|
2137 | InternalPoly::appendTermList ( termList& first, termList& last, const CanonicalForm& coeff, const int exp ) |
---|
2138 | { |
---|
2139 | if ( last ) |
---|
2140 | { |
---|
2141 | last->next = new term( 0, coeff, exp ); |
---|
2142 | last = last->next; |
---|
2143 | } |
---|
2144 | else |
---|
2145 | { |
---|
2146 | first = new term( 0, coeff, exp ); |
---|
2147 | last = first; |
---|
2148 | } |
---|
2149 | } |
---|
2150 | |
---|
2151 | termList |
---|
2152 | InternalPoly::mulAddTermList ( termList theList, termList aList, const CanonicalForm & c, const int exp, termList & lastTerm, bool negate ) |
---|
2153 | { |
---|
2154 | termList theCursor = theList; |
---|
2155 | termList aCursor = aList; |
---|
2156 | termList predCursor = 0; |
---|
2157 | CanonicalForm coeff; |
---|
2158 | |
---|
2159 | if ( negate ) |
---|
2160 | coeff = -c; |
---|
2161 | else |
---|
2162 | coeff = c; |
---|
2163 | |
---|
2164 | while ( theCursor && aCursor ) |
---|
2165 | { |
---|
2166 | if ( theCursor->exp == aCursor->exp + exp ) |
---|
2167 | { |
---|
2168 | theCursor->coeff += aCursor->coeff * coeff; |
---|
2169 | if ( theCursor->coeff.isZero() ) |
---|
2170 | { |
---|
2171 | if ( predCursor ) |
---|
2172 | { |
---|
2173 | predCursor->next = theCursor->next; |
---|
2174 | delete theCursor; |
---|
2175 | theCursor = predCursor->next; |
---|
2176 | } |
---|
2177 | else |
---|
2178 | { |
---|
2179 | theList = theList->next; |
---|
2180 | delete theCursor; |
---|
2181 | theCursor = theList; |
---|
2182 | } |
---|
2183 | } |
---|
2184 | else |
---|
2185 | { |
---|
2186 | predCursor = theCursor; |
---|
2187 | theCursor = theCursor->next; |
---|
2188 | } |
---|
2189 | aCursor = aCursor->next; |
---|
2190 | } |
---|
2191 | else if ( theCursor->exp < aCursor->exp + exp ) |
---|
2192 | { |
---|
2193 | if ( predCursor ) |
---|
2194 | { |
---|
2195 | predCursor->next = new term( theCursor, aCursor->coeff * coeff, aCursor->exp + exp ); |
---|
2196 | predCursor = predCursor->next; |
---|
2197 | } |
---|
2198 | else |
---|
2199 | { |
---|
2200 | theList = new term( theCursor, aCursor->coeff * coeff, aCursor->exp + exp ); |
---|
2201 | predCursor = theList; |
---|
2202 | } |
---|
2203 | aCursor = aCursor->next; |
---|
2204 | } |
---|
2205 | else |
---|
2206 | { |
---|
2207 | predCursor = theCursor; |
---|
2208 | theCursor = theCursor->next; |
---|
2209 | } |
---|
2210 | } |
---|
2211 | if ( aCursor ) |
---|
2212 | { |
---|
2213 | if ( predCursor ) |
---|
2214 | { |
---|
2215 | predCursor->next = copyTermList( aCursor, lastTerm ); |
---|
2216 | predCursor = predCursor->next; |
---|
2217 | } |
---|
2218 | else |
---|
2219 | { |
---|
2220 | theList = copyTermList( aCursor, lastTerm ); |
---|
2221 | predCursor = theList; |
---|
2222 | } |
---|
2223 | while ( predCursor ) |
---|
2224 | { |
---|
2225 | predCursor->exp += exp; |
---|
2226 | predCursor->coeff *= coeff; |
---|
2227 | predCursor = predCursor->next; |
---|
2228 | } |
---|
2229 | } |
---|
2230 | else if ( ! theCursor ) |
---|
2231 | lastTerm = predCursor; |
---|
2232 | return theList; |
---|
2233 | } |
---|
2234 | |
---|
2235 | termList |
---|
2236 | InternalPoly::reduceTermList ( termList first, termList redterms, termList & last ) |
---|
2237 | { |
---|
2238 | CanonicalForm coeff = CanonicalForm (1)/redterms->coeff; |
---|
2239 | CanonicalForm newcoeff; |
---|
2240 | int newexp; |
---|
2241 | int exp = redterms->exp; |
---|
2242 | termList dummy; |
---|
2243 | while ( first && ( first->exp >= exp ) ) |
---|
2244 | { |
---|
2245 | newcoeff = first->coeff * coeff; |
---|
2246 | newexp = first->exp - exp; |
---|
2247 | dummy = first; |
---|
2248 | first = mulAddTermList( first->next, redterms->next, newcoeff, newexp, last, true ); |
---|
2249 | delete dummy; |
---|
2250 | } |
---|
2251 | return first; |
---|
2252 | } |
---|
2253 | |
---|