1 | /*****************************************************************************\ |
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2 | * Computer Algebra System SINGULAR |
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3 | \*****************************************************************************/ |
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4 | /** @file FLINTconvert.cc |
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5 | * |
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6 | * This file implements functions for conversion to FLINT (www.flintlib.org) |
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7 | * and back. |
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8 | * |
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9 | * @author Martin Lee |
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10 | * |
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11 | **/ |
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12 | /*****************************************************************************/ |
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13 | |
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14 | |
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15 | #include <config.h> |
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16 | |
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17 | #include "canonicalform.h" |
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18 | #include "fac_util.h" |
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19 | #include "cf_iter.h" |
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20 | #include "cf_factory.h" |
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21 | #include "gmpext.h" |
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22 | #include "singext.h" |
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23 | #include "cf_algorithm.h" |
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24 | |
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25 | #ifdef HAVE_FLINT |
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26 | #ifdef HAVE_CSTDIO |
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27 | #include <cstdio> |
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28 | #else |
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29 | #include <stdio.h> |
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30 | #endif |
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31 | #ifdef __cplusplus |
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32 | extern "C" |
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33 | { |
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34 | #endif |
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35 | #ifndef __GMP_BITS_PER_MP_LIMB |
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36 | #define __GMP_BITS_PER_MP_LIMB GMP_LIMB_BITS |
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37 | #endif |
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38 | #include <fmpz.h> |
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39 | #include <fmpq.h> |
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40 | #include <fmpz_poly.h> |
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41 | #include <fmpz_mod_poly.h> |
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42 | #include <nmod_poly.h> |
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43 | #include <fmpq_poly.h> |
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44 | #ifdef __cplusplus |
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45 | } |
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46 | #endif |
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47 | |
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48 | #include "FLINTconvert.h" |
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49 | |
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50 | void convertCF2Fmpz (fmpz_t result, const CanonicalForm& f) |
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51 | { |
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52 | if (f.isImm()) |
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53 | fmpz_set_si (result, f.intval()); |
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54 | else |
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55 | { |
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56 | mpz_t gmp_val; |
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57 | gmp_val[0]= *getmpi(f.getval()); |
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58 | fmpz_set_mpz (result, gmp_val); |
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59 | mpz_clear (gmp_val); |
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60 | } |
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61 | } |
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62 | |
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63 | void convertFacCF2Fmpz_poly_t (fmpz_poly_t result, const CanonicalForm& f) |
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64 | { |
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65 | fmpz_poly_init2 (result, degree (f)+1); |
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66 | _fmpz_poly_set_length(result, degree(f)+1); |
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67 | for (CFIterator i= f; i.hasTerms(); i++) |
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68 | convertCF2Fmpz (fmpz_poly_get_coeff_ptr(result, i.exp()), i.coeff()); |
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69 | } |
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70 | |
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71 | CanonicalForm convertFmpz2CF (fmpz_t coefficient) |
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72 | { |
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73 | if (fmpz_cmp_si (coefficient, MINIMMEDIATE) >= 0 && fmpz_cmp_si (coefficient, MAXIMMEDIATE) <= 0) //this should work with flint 2.3 now |
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74 | { |
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75 | long coeff= fmpz_get_si (coefficient); |
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76 | return CanonicalForm (coeff); |
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77 | } |
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78 | else |
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79 | { |
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80 | mpz_t gmp_val; |
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81 | mpz_init (gmp_val); |
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82 | fmpz_get_mpz (gmp_val, coefficient); |
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83 | CanonicalForm result= CanonicalForm (CFFactory::basic (gmp_val)); |
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84 | return result; |
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85 | } |
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86 | |
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87 | /*mpz_t gmp_val; |
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88 | mpz_init (gmp_val); |
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89 | fmpz_get_mpz (gmp_val, coefficient); //TODO fmpz_fits_si |
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90 | if (mpz_is_imm (gmp_val)) //TODO for long |
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91 | { |
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92 | long coeff= mpz_get_si (gmp_val); |
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93 | mpz_clear (gmp_val); |
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94 | return CanonicalForm (coeff); |
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95 | } |
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96 | |
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97 | CanonicalForm result= CanonicalForm (CFFactory::basic (gmp_val)); |
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98 | return result;*/ |
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99 | } |
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100 | |
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101 | CanonicalForm convertFmpz_poly_t2FacCF (fmpz_poly_t poly, const Variable& x) |
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102 | { |
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103 | CanonicalForm result= 0; |
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104 | fmpz* coeff; |
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105 | for (int i= 0; i < fmpz_poly_length (poly); i++) |
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106 | { |
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107 | coeff= fmpz_poly_get_coeff_ptr (poly, i); |
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108 | if (!fmpz_is_zero (coeff)) |
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109 | result += convertFmpz2CF (coeff)*power (x,i); |
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110 | } |
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111 | return result; |
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112 | } |
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113 | |
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114 | void convertFacCF2nmod_poly_t (nmod_poly_t result, const CanonicalForm& f) |
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115 | { |
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116 | bool save_sym_ff= isOn (SW_SYMMETRIC_FF); |
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117 | if (save_sym_ff) Off (SW_SYMMETRIC_FF); |
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118 | nmod_poly_init2 (result, getCharacteristic(), degree (f)+1); |
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119 | for (CFIterator i= f; i.hasTerms(); i++) |
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120 | { |
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121 | CanonicalForm c= i.coeff(); |
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122 | if (!c.isImm()) c.mapinto(); //c%= getCharacteristic(); |
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123 | if (!c.isImm()) |
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124 | { //This case will never happen if the characteristic is in fact a prime |
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125 | // number, since all coefficients are represented as immediates |
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126 | printf("convertCF2nmod_poly_t: coefficient not immediate!, char=%d\n", |
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127 | getCharacteristic()); |
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128 | } |
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129 | else |
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130 | nmod_poly_set_coeff_ui (result, i.exp(), c.intval()); |
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131 | } |
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132 | if (save_sym_ff) On (SW_SYMMETRIC_FF); |
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133 | } |
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134 | |
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135 | CanonicalForm convertnmod_poly_t2FacCF (nmod_poly_t poly, const Variable& x) |
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136 | { |
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137 | CanonicalForm result= 0; |
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138 | for (int i= 0; i < nmod_poly_length (poly); i++) |
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139 | { |
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140 | ulong coeff= nmod_poly_get_coeff_ui (poly, i); |
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141 | if (!coeff == 0) |
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142 | result += CanonicalForm (coeff)*power (x,i); |
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143 | } |
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144 | return result; |
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145 | } |
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146 | |
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147 | void convertCF2Fmpq (fmpq_t result, const CanonicalForm& f) //TODO wie oben bei CF2Fmpz |
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148 | { |
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149 | ASSERT (isOn (SW_RATIONAL), "expected rational"); |
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150 | fmpz_t tmp1, tmp2; |
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151 | fmpz_init (tmp1); |
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152 | fmpz_init (tmp2); |
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153 | if (f.isImm ()) |
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154 | { |
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155 | fmpz_set_si (tmp1, f.num().intval()); |
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156 | fmpz_set_si (tmp2, f.den().intval()); |
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157 | } |
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158 | else |
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159 | { |
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160 | mpz_t gmp_val; |
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161 | gmp_numerator (f, gmp_val); |
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162 | fmpz_set_mpz (tmp1, gmp_val); |
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163 | mpz_clear (gmp_val); |
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164 | gmp_denominator (f, gmp_val); |
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165 | fmpz_set_mpz (tmp2, gmp_val); |
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166 | mpz_clear (gmp_val); |
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167 | } |
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168 | |
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169 | fmpz_set (fmpq_numref (result), tmp1); |
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170 | fmpz_set (fmpq_denref (result), tmp2); |
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171 | fmpz_clear (tmp1); |
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172 | fmpz_clear (tmp2); |
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173 | } |
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174 | |
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175 | CanonicalForm convertFmpq_t2CF (const fmpq_t q) |
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176 | { |
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177 | ASSERT (isOn (SW_RATIONAL), "expected rational"); |
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178 | //TODO as for Fmpz check first if num and den are immediate |
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179 | |
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180 | CanonicalForm num, den; |
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181 | mpz_t nnum, nden; |
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182 | mpz_init (nnum); |
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183 | mpz_init (nden); |
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184 | fmpz_get_mpz (nnum, fmpq_numref (q)); |
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185 | fmpz_get_mpz (nden, fmpq_denref (q)); |
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186 | |
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187 | if (mpz_is_imm (nnum) && mpz_is_imm (nden)) |
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188 | { |
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189 | num= CanonicalForm (mpz_get_si(nnum)); |
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190 | den= CanonicalForm (mpz_get_si(nden)); |
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191 | mpz_clear (nnum); |
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192 | mpz_clear (nden); |
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193 | return num/den; |
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194 | } |
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195 | else |
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196 | return make_cf (nnum, nden, false); |
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197 | } |
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198 | |
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199 | CanonicalForm convertFmpq_poly_t2FacCF (fmpq_poly_t p, const Variable& x) |
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200 | { |
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201 | #if 0 |
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202 | ASSERT (isOn (SW_RATIONAL), "expected poly over Q"); |
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203 | CanonicalForm den= convertFmpz2CF (fmpq_poly_denref (p)); |
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204 | fmpz_poly_t FLINTnum; |
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205 | long n= fmpq_poly_length (p); |
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206 | fmpz_poly_init2 (FLINTnum, fmpq_poly_length (p)); |
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207 | |
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208 | for (long i= 0; i < n; i++) |
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209 | fmpz_set (FLINTnum->coeffs + i,fmpq_poly_numref (p) + i); |
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210 | _fmpz_poly_set_length (FLINTnum, n); |
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211 | CanonicalForm result= convertFmpz_poly_t2FacCF (FLINTnum, x); |
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212 | fmpz_poly_clear (FLINTnum); |
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213 | return result/den; |
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214 | #else |
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215 | CanonicalForm result= 0; |
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216 | fmpq_t coeff; |
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217 | long n= fmpq_poly_length (p); |
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218 | for (long i= 0; i < n; i++) |
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219 | { |
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220 | fmpq_init (coeff); |
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221 | fmpq_poly_get_coeff_fmpq (coeff, p, i); |
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222 | if (fmpq_is_zero (coeff)) |
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223 | { |
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224 | fmpq_clear (coeff); |
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225 | continue; |
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226 | } |
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227 | result += convertFmpq_t2CF (coeff)*power (x, i); |
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228 | fmpq_clear (coeff); |
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229 | } |
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230 | return result; |
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231 | #endif |
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232 | } |
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233 | |
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234 | void convertFacCF2Fmpz_array (fmpz* result, const CanonicalForm& f) |
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235 | { |
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236 | for (CFIterator i= f; i.hasTerms(); i++) |
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237 | convertCF2Fmpz (&result[i.exp()], i.coeff()); |
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238 | } |
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239 | |
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240 | //TODO multiply by bCommonDen and convertFacCF2Fmpz_poly_t |
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241 | void convertFacCF2Fmpq_poly_t (fmpq_poly_t result, const CanonicalForm& f) |
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242 | { |
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243 | ASSERT (isOn (SW_RATIONAL), "expected poly over Q"); |
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244 | |
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245 | fmpq_poly_init2 (result, degree (f)+1); |
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246 | _fmpq_poly_set_length (result, degree (f) + 1); |
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247 | CanonicalForm den= bCommonDen (f); |
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248 | convertFacCF2Fmpz_array (fmpq_poly_numref (result), f*den); |
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249 | convertCF2Fmpz (fmpq_poly_denref (result), den); |
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250 | /*fmpq_t coeff; |
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251 | for (CFIterator i= f; i.hasTerms(); i++) |
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252 | { |
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253 | fmpq_init (coeff); |
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254 | convertCF2Fmpq (coeff, i.coeff()); |
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255 | fmpq_poly_set_coeff_fmpq (result, i.exp(), coeff); |
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256 | fmpq_clear (coeff); |
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257 | }*/ |
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258 | } |
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259 | |
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260 | CFFList |
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261 | convertFLINTnmod_poly_factor2FacCFFList (nmod_poly_factor_t fac, |
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262 | mp_limb_t leadingCoeff, |
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263 | const Variable& x |
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264 | ) |
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265 | { |
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266 | CFFList result; |
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267 | if (leadingCoeff != 1) |
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268 | result.insert (CFFactor (CanonicalForm ((long) leadingCoeff), 1)); |
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269 | |
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270 | long i; |
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271 | |
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272 | for (i = 0; i < fac->num_factors; i++) |
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273 | result.append (CFFactor (convertnmod_poly_t2FacCF ((nmod_poly_t &)fac->factors[i],x), |
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274 | fac->exponents[i])); |
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275 | return result; |
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276 | } |
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277 | |
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278 | void |
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279 | convertFacCF2Fmpz_mod_poly_t (fmpz_mod_poly_t result, const CanonicalForm& f, |
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280 | const fmpz_t p) |
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281 | { |
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282 | fmpz_mod_poly_init2 (result, p, degree (f) + 1); |
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283 | fmpz_poly_t buf; |
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284 | convertFacCF2Fmpz_poly_t (buf, f); |
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285 | fmpz_mod_poly_set_fmpz_poly (result, buf); |
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286 | fmpz_poly_clear (buf); |
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287 | } |
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288 | |
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289 | CanonicalForm |
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290 | convertFmpz_mod_poly_t2FacCF (fmpz_mod_poly_t poly, const Variable& x, |
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291 | const modpk& b) |
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292 | { |
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293 | fmpz_poly_t buf; |
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294 | fmpz_poly_init (buf); |
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295 | fmpz_mod_poly_get_fmpz_poly (buf, poly); |
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296 | CanonicalForm result= convertFmpz_poly_t2FacCF (buf, x); |
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297 | fmpz_poly_clear (buf); |
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298 | return b (result); |
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299 | } |
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300 | |
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301 | #endif |
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302 | |
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303 | |
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