1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* $Id: ring.cc,v 1.21 1998-04-03 17:38:41 Singular Exp $ */ |
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5 | |
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6 | /* |
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7 | * ABSTRACT - the interpreter related ring operations |
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8 | */ |
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9 | |
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10 | /* includes */ |
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11 | #include <math.h> |
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12 | #include "mod2.h" |
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13 | #include "mmemory.h" |
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14 | #include "tok.h" |
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15 | #include "polys.h" |
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16 | #include "numbers.h" |
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17 | #include "febase.h" |
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18 | #include "ipid.h" |
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19 | #include "ipshell.h" |
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20 | #include "ipconv.h" |
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21 | #include "intvec.h" |
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22 | #include "longalg.h" |
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23 | #include "ffields.h" |
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24 | #include "spolys.h" |
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25 | #include "subexpr.h" |
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26 | #include "ideals.h" |
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27 | #include "lists.h" |
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28 | #include "ring.h" |
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29 | |
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30 | /* global variables */ |
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31 | #ifdef RDEBUG |
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32 | short rNumber=0; |
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33 | #endif |
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34 | |
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35 | /*0 implementation*/ |
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36 | int rBlocks(ring r) |
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37 | { |
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38 | int i=0; |
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39 | while (r->order[i]!=0) i++; |
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40 | return i+1; |
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41 | } |
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42 | |
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43 | // internally changes the gloabl ring and resets the relevant |
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44 | // global variables: |
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45 | // complete == FALSE : only delete operations are enabled |
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46 | // complete == TRUE : full reset of all variables |
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47 | void rChangeCurrRing(ring r, BOOLEAN complete) |
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48 | { |
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49 | if (r != NULL) |
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50 | { |
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51 | /*------------ set redTail, except reset by nSetChar or pChangeRing */ |
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52 | test |= Sy_bit(OPT_REDTAIL); |
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53 | |
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54 | /*------------ global variables related to coefficients ------------*/ |
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55 | nSetChar(r->ch, complete, r->parameter, r->P); |
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56 | |
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57 | /*------------ global variables related to polys -------------------*/ |
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58 | pSetGlobals(r, complete); |
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59 | |
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60 | /*------------ set naMinimalPoly -----------------------------------*/ |
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61 | if (r->minpoly!=NULL) |
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62 | { |
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63 | naMinimalPoly=((lnumber)r->minpoly)->z; |
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64 | } |
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65 | |
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66 | /*------------ set global ring vars --------------------------------*/ |
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67 | currRing = r; |
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68 | currQuotient=r->qideal; |
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69 | |
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70 | #ifdef DRING |
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71 | pDRING=FALSE; |
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72 | pSDRING=FALSE; |
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73 | if (hasFlag(h,FLAG_DRING)) rDSet(); |
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74 | #endif // DRING |
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75 | |
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76 | #ifdef SRING |
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77 | if ((currRing->partN<=currRing->N) |
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78 | #ifdef DRING |
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79 | && (!hasFlag(h,FLAG_DRING)) |
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80 | #endif |
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81 | ) |
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82 | { |
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83 | pAltVars=currRing->partN; |
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84 | pSRING=TRUE; |
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85 | pSDRING=TRUE; |
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86 | } |
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87 | else |
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88 | { |
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89 | pAltVars=currRing->N+1; |
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90 | } |
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91 | #endif // SRING |
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92 | |
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93 | /*------------ set spolys ------------------------------------------*/ |
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94 | if (complete) spSet(r); |
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95 | } |
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96 | } |
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97 | |
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98 | void rSetHdl(idhdl h, BOOLEAN complete) |
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99 | { |
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100 | int i; |
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101 | ring rg = NULL; |
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102 | if (h!=NULL) |
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103 | { |
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104 | rg = IDRING(h); |
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105 | mmTestP((ADDRESS)h,sizeof(idrec)); |
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106 | mmTestLP((ADDRESS)IDID(h)); |
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107 | mmTestP(rg,sizeof(ip_sring)); |
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108 | #ifdef MDEBUG |
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109 | i=rBlocks(rg); |
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110 | #endif |
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111 | mmTestP(rg->order,i*sizeof(int)); |
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112 | mmTestP(rg->block0,i*sizeof(int)); |
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113 | mmTestP(rg->block1,i*sizeof(int)); |
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114 | mmTestP(rg->wvhdl,i*sizeof(short *)); |
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115 | } |
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116 | else complete=FALSE; |
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117 | |
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118 | // clean up history |
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119 | if (((sLastPrinted.rtyp>BEGIN_RING) && (sLastPrinted.rtyp<END_RING)) |
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120 | || ((sLastPrinted.rtyp==LIST_CMD)&&(lRingDependend((lists)sLastPrinted.data)))) |
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121 | { |
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122 | sLastPrinted.CleanUp(); |
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123 | memset(&sLastPrinted,0,sizeof(sleftv)); |
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124 | } |
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125 | |
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126 | /*------------ change the global ring -----------------------*/ |
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127 | rChangeCurrRing(rg,complete); |
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128 | currRingHdl = h; |
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129 | |
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130 | /*------------ set pShortOut -----------------------*/ |
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131 | if (complete /*&&(h!=NULL)*/) |
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132 | { |
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133 | #ifdef HAVE_TCL |
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134 | if (tclmode) |
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135 | { |
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136 | PrintTCLS('R',IDID(h)); |
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137 | pShortOut=(int)FALSE; |
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138 | } |
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139 | else |
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140 | #endif |
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141 | { |
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142 | pShortOut=(int)TRUE; |
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143 | if ((rg->parameter!=NULL) && (rg->ch<2)) |
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144 | { |
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145 | for (i=0;i<rg->P;i++) |
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146 | { |
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147 | if(strlen(rg->parameter[i])>1) |
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148 | { |
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149 | pShortOut=(int)FALSE; |
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150 | break; |
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151 | } |
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152 | } |
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153 | } |
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154 | if (pShortOut) |
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155 | { |
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156 | for (i=(rg->N-1);i>=0;i--) |
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157 | { |
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158 | if(strlen(rg->names[i])>1) |
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159 | { |
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160 | pShortOut=(int)FALSE; |
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161 | break; |
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162 | } |
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163 | } |
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164 | } |
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165 | } |
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166 | } |
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167 | |
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168 | } |
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169 | |
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170 | idhdl rDefault(char *s) |
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171 | { |
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172 | idhdl tmp=NULL; |
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173 | |
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174 | if (s!=NULL) tmp = enterid(s, myynest, RING_CMD, &idroot); |
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175 | if (tmp==NULL) return NULL; |
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176 | |
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177 | if (ppNoether!=NULL) pDelete(&ppNoether); |
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178 | if ((sLastPrinted.rtyp>BEGIN_RING) && (sLastPrinted.rtyp<END_RING)) |
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179 | { |
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180 | sLastPrinted.CleanUp(); |
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181 | memset(&sLastPrinted,0,sizeof(sleftv)); |
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182 | } |
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183 | |
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184 | currRing = IDRING(tmp); |
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185 | |
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186 | currRing->ch = 32003; |
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187 | currRing->N = 3; |
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188 | /*currRing->P = 0; Alloc0 in idhdl::set, ipid.cc*/ |
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189 | #ifdef RDEBUG |
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190 | rNumber++; |
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191 | currRing->no =rNumber; |
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192 | #endif |
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193 | #ifdef SRING |
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194 | currRing->partN = 4; |
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195 | #endif |
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196 | /*names*/ |
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197 | currRing->names = (char **) Alloc(3 * sizeof(char *)); |
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198 | currRing->names[0] = mstrdup("x"); |
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199 | currRing->names[1] = mstrdup("y"); |
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200 | currRing->names[2] = mstrdup("z"); |
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201 | /*weights: entries for 3 blocks: NULL*/ |
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202 | currRing->wvhdl = (short **)Alloc0(3 * sizeof(short *)); |
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203 | /*order: dp,C,0*/ |
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204 | currRing->order = (int *) Alloc(3 * sizeof(int *)); |
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205 | currRing->block0 = (int *)Alloc(3 * sizeof(int *)); |
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206 | currRing->block1 = (int *)Alloc(3 * sizeof(int *)); |
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207 | /* ringorder dp for the first block: var 1..3 */ |
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208 | currRing->order[0] = ringorder_dp; |
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209 | currRing->block0[0] = 1; |
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210 | currRing->block1[0] = 3; |
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211 | /* ringorder C for the second block: no vars */ |
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212 | currRing->order[1] = ringorder_C; |
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213 | currRing->block0[1] = 0; |
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214 | currRing->block1[1] = 0; |
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215 | /* the last block: everything is 0 */ |
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216 | currRing->order[2] = 0; |
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217 | currRing->block0[2] = 0; |
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218 | currRing->block1[2] = 0; |
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219 | /*polynomial ring*/ |
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220 | currRing->OrdSgn = 1; |
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221 | |
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222 | /* complete ring intializations */ |
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223 | rComplete(currRing); |
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224 | rSetHdl(tmp,TRUE); |
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225 | return currRingHdl; |
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226 | } |
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227 | |
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228 | /*2 |
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229 | *check intvec, describing the ordering |
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230 | */ |
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231 | BOOLEAN rCheckIV(intvec *iv) |
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232 | { |
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233 | if ((iv->length()!=2)&&(iv->length()!=3)) |
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234 | { |
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235 | WerrorS("weights only for orderings wp,ws,Wp,Ws,a,M"); |
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236 | return TRUE; |
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237 | } |
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238 | return FALSE; |
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239 | } |
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240 | |
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241 | static int rTypeOfMatrixOrder(intvec * order) |
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242 | { |
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243 | int i=0,j,typ=1; |
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244 | int sz = (int)sqrt((double)(order->length()-2)); |
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245 | |
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246 | while ((i<sz) && (typ==1)) |
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247 | { |
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248 | j=0; |
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249 | while ((j<sz) && ((*order)[j*sz+i+2]==0)) j++; |
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250 | if (j>=sz) |
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251 | { |
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252 | typ = 0; |
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253 | WerrorS("Matrix order not complete"); |
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254 | } |
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255 | else if ((*order)[j*sz+i+2]<0) |
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256 | typ = -1; |
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257 | else |
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258 | i++; |
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259 | } |
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260 | return typ; |
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261 | } |
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262 | |
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263 | /*2 |
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264 | * define a new ring from the data: |
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265 | *s: name, chr: ch, parameter names (or NULL): pn, |
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266 | *varnames: rv, ordering: ord, typ: typ |
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267 | */ |
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268 | idhdl rInit(char *s, sleftv* pn, sleftv* rv, sleftv* ord, |
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269 | BOOLEAN isDRing) |
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270 | { |
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271 | int ch; |
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272 | if (pn->Typ()==INT_CMD) |
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273 | { |
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274 | ch=(int)pn->Data(); |
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275 | } |
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276 | else if (strcmp(pn->name,"real")==0) |
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277 | { |
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278 | ch=-1; |
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279 | } |
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280 | else |
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281 | { |
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282 | pn->CleanUp(); |
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283 | rv->CleanUp(); |
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284 | ord->CleanUp(); |
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285 | return NULL; |
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286 | } |
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287 | pn=pn->next; |
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288 | |
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289 | int l, last; |
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290 | int typ = 1; |
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291 | sleftv * sl; |
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292 | idhdl tmp; |
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293 | ip_sring tmpR; |
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294 | BOOLEAN ffChar=FALSE; |
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295 | /*every entry in the new ring is initialized to 0*/ |
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296 | |
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297 | /* characteristic -----------------------------------------------*/ |
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298 | /* input: 0 ch=0 : Q parameter=NULL ffChar=FALSE |
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299 | * 0 1 : Q(a,...) *names FALSE |
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300 | * 0 -1 : R NULL FALSE |
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301 | * p p : Fp NULL FALSE |
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302 | * p -p : Fp(a) *names FALSE |
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303 | * q q : GF(q=p^n) *names TRUE |
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304 | */ |
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305 | if (ch!=-1) |
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306 | { |
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307 | if ((ch!=0) &&((ch<2) || (ch > 32003))) |
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308 | { |
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309 | ch=32003; |
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310 | } |
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311 | l=0; |
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312 | if (pn!=NULL) |
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313 | { |
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314 | while ((ch!=fftable[l]) && (fftable[l])) l++; |
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315 | if (fftable[l]==0) |
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316 | { |
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317 | ch = IsPrime(ch); |
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318 | } |
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319 | else |
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320 | { |
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321 | char *m[1]={(char *)sNoName}; |
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322 | nfSetChar(ch,m); |
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323 | if(errorreported) |
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324 | { |
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325 | errorreported=0; |
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326 | ch=IsPrime(ch); |
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327 | } |
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328 | else |
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329 | { |
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330 | ffChar=TRUE; |
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331 | } |
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332 | } |
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333 | } |
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334 | else |
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335 | { |
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336 | ch = IsPrime(ch); |
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337 | } |
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338 | } |
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339 | memset(&tmpR,0,sizeof(tmpR)); |
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340 | |
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341 | tmpR.ch = ch; |
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342 | |
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343 | /* parameter -------------------------------------------------------*/ |
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344 | sleftv* hs; |
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345 | const char* h; |
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346 | |
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347 | if ((pn!=NULL)&& (ffChar||(ch==-1))) |
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348 | { |
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349 | if((ffChar && (pn->next!=NULL)) |
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350 | || (ch==-1)) |
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351 | { |
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352 | WarnS("too many parameters"); |
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353 | if (ffChar) hs=pn->next; |
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354 | else hs=pn; |
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355 | hs->CleanUp(); |
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356 | if (ffChar) |
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357 | { |
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358 | pn->next=NULL; |
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359 | Free((ADDRESS)hs,sizeof(sleftv)); |
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360 | } |
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361 | else pn=NULL; |
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362 | } |
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363 | } |
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364 | /* a tempory pointer for typ conversion |
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365 | * and for deallocating sleftv*-lists: |
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366 | * don't deallocate the first but all other entries*/ |
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367 | |
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368 | if (pn!=NULL) |
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369 | { |
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370 | tmpR.P=pn->listLength(); |
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371 | if((ffChar && (tmpR.P>1)) |
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372 | || ((ch==-1) && (tmpR.P>0))) |
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373 | { |
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374 | tmpR.P=ffChar; /* GF(q): 1, R: 0 */ |
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375 | WarnS("too many parameters"); |
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376 | if (ffChar) hs=pn->next; |
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377 | else hs=pn; |
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378 | hs->CleanUp(); |
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379 | Free((ADDRESS)hs,sizeof(sleftv)); |
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380 | if (ffChar) pn->next=NULL; |
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381 | else pn=NULL; |
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382 | } |
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383 | tmpR.parameter=(char**)Alloc(tmpR.P*sizeof(char *)); |
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384 | sl=pn; |
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385 | char** p=tmpR.parameter; |
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386 | while(sl!=NULL) |
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387 | { |
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388 | hs=NULL; |
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389 | h=sl->Name(); |
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390 | if ((h==sNoName)&&(sl->Typ()==POLY_CMD)) |
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391 | { |
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392 | hs=(leftv)Alloc(sizeof(sleftv)); |
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393 | iiConvert(POLY_CMD,ANY_TYPE,-1,sl,hs); |
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394 | sl->next=hs->next; |
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395 | hs->next=NULL; |
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396 | h=hs->Name(); |
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397 | } |
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398 | if (h==sNoName) |
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399 | { |
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400 | WerrorS("parameter expected"); |
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401 | pn->CleanUp(); |
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402 | rv->CleanUp(); |
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403 | ord->CleanUp(); |
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404 | return NULL; |
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405 | } |
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406 | *p=mstrdup(h); |
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407 | p++; |
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408 | if (hs!=NULL) |
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409 | { |
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410 | hs->CleanUp(); |
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411 | Free((ADDRESS)hs,sizeof(sleftv)); |
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412 | } |
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413 | hs=sl; |
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414 | sl=sl->next; |
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415 | hs->next=NULL; |
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416 | hs->CleanUp(); |
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417 | if (hs!=pn) Free((ADDRESS)hs,sizeof(sleftv)); |
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418 | } |
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419 | if ((ch>1) && /*(pn!=NULL) &&*/ (!ffChar)) tmpR.ch=-tmpR.ch; |
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420 | if (ch==0) tmpR.ch=1; |
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421 | } |
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422 | |
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423 | /* names and number of variables-------------------------------------*/ |
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424 | { |
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425 | int i, n; |
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426 | sl = rv; |
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427 | #ifdef DRING |
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428 | char *tmpname=NULL; |
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429 | #endif |
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430 | n=rv->listLength(); |
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431 | tmpR.N = n; |
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432 | #ifdef SDRING |
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433 | tmpR.partN=n+1-isDRing; // set to N+1 for SRING, N for DRING |
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434 | if (isDRing) n=2*n+1; |
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435 | #endif |
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436 | tmpR.N = n; |
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437 | tmpR.names = (char **)Alloc(n * sizeof(char *)); |
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438 | for (sl=rv, i=0; i<n; i++) |
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439 | { |
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440 | hs=NULL; |
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441 | #ifdef DRING |
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442 | if (sl==NULL) |
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443 | { |
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444 | if (i==tmpR.N-1) |
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445 | tmpname=mstrdup(""); |
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446 | else |
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447 | { |
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448 | tmpname=(char*)AllocL(strlen(tmpR.names[i-tmpR.partN])+2); |
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449 | strcpy(tmpname,"d"); |
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450 | strcat(tmpname,tmpR.names[i-tmpR.partN]); |
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451 | } |
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452 | h=tmpname; |
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453 | } |
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454 | else |
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455 | #endif |
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456 | h=sl->Name(); |
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457 | if ((h==sNoName)&&(sl->Typ()==POLY_CMD)) |
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458 | { |
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459 | hs=(leftv)Alloc(sizeof(sleftv)); |
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460 | iiConvert(POLY_CMD,ANY_TYPE,-1,sl,hs); |
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461 | sl->next=hs->next; |
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462 | hs->next=NULL; |
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463 | h=hs->Name(); |
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464 | } |
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465 | if (h==sNoName) |
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466 | { |
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467 | WerrorS("expected name of ring variable"); |
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468 | sl->CleanUp(); |
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469 | ord->CleanUp(); |
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470 | return NULL; |
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471 | } |
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472 | tmpR.names[i] = mstrdup(h); |
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473 | if (hs!=NULL) |
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474 | { |
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475 | hs->CleanUp(); |
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476 | Free((ADDRESS)hs,sizeof(sleftv)); |
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477 | } |
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478 | hs=sl; |
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479 | #ifdef DRING |
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480 | if (sl!=NULL) |
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481 | { |
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482 | #endif |
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483 | sl=sl->next; |
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484 | hs->next=NULL; |
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485 | hs->CleanUp(); |
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486 | if (hs!=rv) Free((ADDRESS)hs,sizeof(sleftv)); |
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487 | #ifdef DRING |
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488 | } |
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489 | if (tmpname!=NULL) |
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490 | { |
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491 | FreeL((ADDRESS)tmpname); |
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492 | tmpname=NULL; |
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493 | } |
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494 | #endif |
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495 | } |
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496 | |
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497 | /* ordering -------------------------------------------------------------*/ |
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498 | sl = ord; |
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499 | /* the number of orderings*/ |
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500 | n = 1; i=0; |
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501 | int o=0; |
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502 | while (sl!=NULL) |
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503 | { |
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504 | intvec *iv = (intvec *)(sl->data); |
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505 | if (((*iv)[1]==ringorder_c)||((*iv)[1]==ringorder_C)) i++; |
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506 | else if ((*iv)[1]!=ringorder_a) o++; |
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507 | n++; |
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508 | sl=sl->next; |
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509 | } |
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510 | if (o==0) |
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511 | { |
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512 | WerrorS("invalid combination of orderings"); |
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513 | ord->CleanUp(); |
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514 | return NULL; |
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515 | } |
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516 | if (i==0) n++; |
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517 | else if (i!=1) |
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518 | WarnS("more than one ordering c/C -- ignored"); |
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519 | |
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520 | /* allocating */ |
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521 | tmpR.order=(int *)Alloc0(n*sizeof(int)); |
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522 | tmpR.block0=(int *)Alloc0(n*sizeof(int)); |
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523 | tmpR.block1=(int *)Alloc0(n*sizeof(int)); |
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524 | tmpR.wvhdl=(short**)Alloc0(n*sizeof(short*)); |
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525 | |
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526 | /* init orders */ |
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527 | sl=ord; |
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528 | n=0; |
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529 | last=0; |
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530 | while (sl!=NULL) |
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531 | { |
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532 | intvec *iv; |
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533 | iv = (intvec *)(sl->data); |
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534 | |
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535 | /* the format of an ordering: |
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536 | * iv[0]: factor |
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537 | * iv[1]: ordering |
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538 | * iv[2..end]: weights |
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539 | */ |
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540 | tmpR.order[n] = (*iv)[1]; |
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541 | switch ((*iv)[1]) |
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542 | { |
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543 | case ringorder_ws: |
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544 | case ringorder_Ws: |
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545 | typ=-1; |
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546 | case ringorder_wp: |
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547 | case ringorder_Wp: |
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548 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
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549 | for (l=2;l<iv->length();l++) |
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550 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
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551 | tmpR.block0[n]=last+1; |
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552 | last+=iv->length()-2; |
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553 | tmpR.block1[n]=last; |
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554 | break; |
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555 | case ringorder_ls: |
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556 | case ringorder_ds: |
---|
557 | case ringorder_Ds: |
---|
558 | typ=-1; |
---|
559 | case ringorder_lp: |
---|
560 | case ringorder_dp: |
---|
561 | case ringorder_Dp: |
---|
562 | tmpR.block0[n]=last+1; |
---|
563 | //last+=(*iv)[0]; |
---|
564 | if (iv->length()==3) last+=(*iv)[2]; |
---|
565 | else last+=(*iv)[0]; |
---|
566 | tmpR.block1[n]=last; |
---|
567 | if (rCheckIV(iv)) return NULL; |
---|
568 | break; |
---|
569 | case ringorder_c: |
---|
570 | case ringorder_C: |
---|
571 | if (rCheckIV(iv)) return NULL; |
---|
572 | break; |
---|
573 | case ringorder_a: |
---|
574 | tmpR.block0[n]=last+1; |
---|
575 | tmpR.block1[n]=last+iv->length()-2; |
---|
576 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
---|
577 | for (l=2;l<iv->length();l++) |
---|
578 | { |
---|
579 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
---|
580 | if ((*iv)[l]<0) typ=-1; |
---|
581 | } |
---|
582 | break; |
---|
583 | case ringorder_M: |
---|
584 | { |
---|
585 | int Mtyp=rTypeOfMatrixOrder(iv); |
---|
586 | if (Mtyp==0) return NULL; |
---|
587 | if (Mtyp==-1) typ=-1; |
---|
588 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
---|
589 | for (l=2;l<iv->length();l++) |
---|
590 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
---|
591 | tmpR.block0[n]=last+1; |
---|
592 | last+=(int)sqrt((double)(iv->length()-2)); |
---|
593 | tmpR.block1[n]=last; |
---|
594 | break; |
---|
595 | } |
---|
596 | #ifdef TEST |
---|
597 | default: |
---|
598 | Print("order ??? %d\n",(*iv)[1]); |
---|
599 | break; |
---|
600 | #endif |
---|
601 | } |
---|
602 | sl=sl->next; |
---|
603 | n++; |
---|
604 | } |
---|
605 | ord->CleanUp(); |
---|
606 | if (i==0) |
---|
607 | { |
---|
608 | /*there is no c/C-ordering, so append it at the end*/ |
---|
609 | tmpR.order[n]=ringorder_C; |
---|
610 | } |
---|
611 | else n--; |
---|
612 | while ((tmpR.order[n]==ringorder_c) |
---|
613 | ||(tmpR.order[n]==ringorder_C)) |
---|
614 | n--; |
---|
615 | if (tmpR.block1[n]!=tmpR.N) |
---|
616 | { |
---|
617 | if ((tmpR.order[n]==ringorder_dp) || |
---|
618 | (tmpR.order[n]==ringorder_ds) || |
---|
619 | (tmpR.order[n]==ringorder_Dp) || |
---|
620 | (tmpR.order[n]==ringorder_Ds) || |
---|
621 | (tmpR.order[n]==ringorder_lp) || |
---|
622 | (tmpR.order[n]==ringorder_ls)) |
---|
623 | { |
---|
624 | tmpR.block1[n]=tmpR.N; |
---|
625 | if (tmpR.block0[n]>tmpR.N/*tmpR.block1[n]*/) |
---|
626 | { |
---|
627 | tmpR.block1[n]=tmpR.block0[n]; |
---|
628 | goto ord_mismatch; |
---|
629 | //Werror("mismatch of number of vars (%d) and ordering (>=%d vars)", |
---|
630 | // tmpR.N,tmpR.block0[n]); |
---|
631 | //return NULL; |
---|
632 | } |
---|
633 | } |
---|
634 | else |
---|
635 | { |
---|
636 | ord_mismatch: |
---|
637 | Werror("mismatch of number of vars (%d) and ordering (%d vars)", |
---|
638 | tmpR.N,tmpR.block1[n]); |
---|
639 | return NULL; |
---|
640 | } |
---|
641 | } |
---|
642 | } |
---|
643 | tmpR.OrdSgn = typ; |
---|
644 | // Complete the initialization |
---|
645 | rComplete(&tmpR); |
---|
646 | /* try to enter the ring into the name list*/ |
---|
647 | if ((tmp = enterid(s, myynest, RING_CMD, &idroot))==NULL) |
---|
648 | { |
---|
649 | return NULL; |
---|
650 | } |
---|
651 | |
---|
652 | memcpy(IDRING(tmp),&tmpR,sizeof(tmpR)); |
---|
653 | rSetHdl(tmp,TRUE); |
---|
654 | |
---|
655 | #ifdef RDEBUG |
---|
656 | rNumber++; |
---|
657 | currRing->no =rNumber; |
---|
658 | #endif |
---|
659 | |
---|
660 | return currRingHdl; |
---|
661 | } |
---|
662 | |
---|
663 | // set those fields of the ring, which can be computed from other fields: |
---|
664 | // More particularly, sets r->VarOffset |
---|
665 | |
---|
666 | void rComplete(ring r) |
---|
667 | { |
---|
668 | int VarCompIndex, VarOffset, dummy; |
---|
669 | pGetVarIndicies(r, VarOffset, VarCompIndex, dummy, dummy); |
---|
670 | r->VarOffset = (short) VarOffset; |
---|
671 | r->VarCompIndex = (short) VarCompIndex; |
---|
672 | } |
---|
673 | |
---|
674 | /*2 |
---|
675 | * set a new ring from the data: |
---|
676 | s: name, chr: ch, varnames: rv, ordering: ord, typ: typ |
---|
677 | */ |
---|
678 | #ifdef DRING |
---|
679 | void rDSet() |
---|
680 | { |
---|
681 | pDRING=TRUE; |
---|
682 | pSDRING=TRUE; |
---|
683 | pdN=currRing->partN; |
---|
684 | pdK=pVariables-pdN*2-1; |
---|
685 | } |
---|
686 | #endif |
---|
687 | |
---|
688 | int rIsRingVar(char *n) |
---|
689 | { |
---|
690 | if ((currRing!=NULL) && (currRing->names!=NULL)) |
---|
691 | { |
---|
692 | for (int i=0; i<currRing->N; i++) |
---|
693 | { |
---|
694 | if (currRing->names[i]==NULL) return -1; |
---|
695 | if (strcmp(n,currRing->names[i]) == 0) return (int)i; |
---|
696 | } |
---|
697 | } |
---|
698 | return -1; |
---|
699 | } |
---|
700 | |
---|
701 | char* RingVar(short i) |
---|
702 | { |
---|
703 | return currRing->names[i]; |
---|
704 | } |
---|
705 | |
---|
706 | void rWrite(ring r) |
---|
707 | { |
---|
708 | if ((r==NULL)||(r->order==NULL)) |
---|
709 | return; /*to avoid printing after errors....*/ |
---|
710 | |
---|
711 | int nblocks=rBlocks(r); |
---|
712 | |
---|
713 | mmTestP(r,sizeof(ip_sring)); |
---|
714 | mmTestP(r->order,nblocks*sizeof(int)); |
---|
715 | mmTestP(r->block0,nblocks*sizeof(int)); |
---|
716 | mmTestP(r->block1,nblocks*sizeof(int)); |
---|
717 | mmTestP(r->wvhdl,nblocks*sizeof(short *)); |
---|
718 | mmTestP(r->names,r->N*sizeof(char *)); |
---|
719 | |
---|
720 | nblocks--; |
---|
721 | |
---|
722 | |
---|
723 | if ((r->parameter!=NULL)&&(r->ch>1)) |
---|
724 | PrintS("// # ground field : "); |
---|
725 | else |
---|
726 | PrintS("// characteristic : "); |
---|
727 | if (r->ch==-1) Print ("0 (real)\n"); /* R */ |
---|
728 | else if (r->ch<0) Print ("%d\n",-r->ch); /* Fp(a) */ |
---|
729 | else if (r->ch==1) PrintS("0\n"); /* Q(a) */ |
---|
730 | else Print ("%d\n",r->ch); /* Fq, Fp, Q */ |
---|
731 | if (r->parameter!=NULL) |
---|
732 | { |
---|
733 | if (r->ch<2) |
---|
734 | { |
---|
735 | Print ("// %d parameter : ",rPar(r)); |
---|
736 | char **sp=r->parameter; |
---|
737 | int nop=0; |
---|
738 | while (nop<r->P) |
---|
739 | { |
---|
740 | PrintS(*sp); |
---|
741 | PrintS(" "); |
---|
742 | sp++; nop++; |
---|
743 | } |
---|
744 | PrintS("\n// minpoly : "); |
---|
745 | if (r==currRing) |
---|
746 | { |
---|
747 | StringSetS(""); nWrite(r->minpoly); PrintS(StringAppendS("\n")); |
---|
748 | } |
---|
749 | else if (r->minpoly==NULL) |
---|
750 | { |
---|
751 | PrintS("0\n"); |
---|
752 | } |
---|
753 | else |
---|
754 | { |
---|
755 | PrintS("...\n"); |
---|
756 | } |
---|
757 | } |
---|
758 | else |
---|
759 | { |
---|
760 | Print("// primitive element : %s\n", r->parameter[0]); |
---|
761 | if (r==currRing) |
---|
762 | { |
---|
763 | StringSetS("// minpoly : "); |
---|
764 | nfShowMipo();PrintS(StringAppend("\n")); |
---|
765 | } |
---|
766 | } |
---|
767 | } |
---|
768 | Print("// number of vars : %d",r->N); |
---|
769 | |
---|
770 | //for (nblocks=0; r->order[nblocks]; nblocks++); |
---|
771 | nblocks=rBlocks(r)-1; |
---|
772 | |
---|
773 | for (int l=0, nlen=0 ; l<nblocks; l++) |
---|
774 | { |
---|
775 | int i; |
---|
776 | Print("\n// block %3d : ",l+1); |
---|
777 | |
---|
778 | Print("ordering %c", (" acCMldDwWldDwWu")[r->order[l]]); |
---|
779 | if ((r->order[l]>=ringorder_lp)&&(r->order[l]!=ringorder_unspec)) |
---|
780 | { |
---|
781 | if (r->order[l]>=ringorder_ls) |
---|
782 | PrintS("s"); |
---|
783 | else |
---|
784 | PrintS("p"); |
---|
785 | } |
---|
786 | |
---|
787 | if ((r->order[l] != ringorder_c) && (r->order[l] != ringorder_C)) |
---|
788 | { |
---|
789 | PrintS("\n// : names "); |
---|
790 | for (i = r->block0[l]-1; i<r->block1[l]; i++) |
---|
791 | { |
---|
792 | nlen = strlen(r->names[i]); |
---|
793 | Print("%s ",r->names[i]); |
---|
794 | } |
---|
795 | } |
---|
796 | |
---|
797 | if (r->wvhdl[l]!=NULL) |
---|
798 | { |
---|
799 | for (int j= 0; |
---|
800 | j<(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1); |
---|
801 | j+=i) |
---|
802 | { |
---|
803 | PrintS("\n// : weights "); |
---|
804 | for (i = 0; i<=r->block1[l]-r->block0[l]; i++) |
---|
805 | { |
---|
806 | Print("%*d " ,nlen,r->wvhdl[l][i+j],i+j); |
---|
807 | } |
---|
808 | if (r->order[l]!=ringorder_M) break; |
---|
809 | } |
---|
810 | } |
---|
811 | } |
---|
812 | if (r->qideal!=NULL) |
---|
813 | { |
---|
814 | PrintS("\n// quotient ring from ideal"); |
---|
815 | if (r==currRing) |
---|
816 | { |
---|
817 | PrintLn(); |
---|
818 | iiWriteMatrix((matrix)r->qideal,"_",1); |
---|
819 | } |
---|
820 | else PrintS(" ..."); |
---|
821 | } |
---|
822 | } |
---|
823 | |
---|
824 | void rKill(ring r) |
---|
825 | { |
---|
826 | if ((r->ref<=0)&&(r->order!=NULL)) |
---|
827 | { |
---|
828 | #ifdef RDEBUG |
---|
829 | if (traceit &TRACE_SHOW_RINGS) Print("kill ring %d\n",r->no); |
---|
830 | #endif |
---|
831 | if (r==currRing) |
---|
832 | { |
---|
833 | if (r->qideal!=NULL) |
---|
834 | { |
---|
835 | idDelete(&r->qideal); |
---|
836 | r->qideal=NULL; |
---|
837 | currQuotient=NULL; |
---|
838 | } |
---|
839 | if (ppNoether!=NULL) pDelete(&ppNoether); |
---|
840 | if ((sLastPrinted.rtyp>BEGIN_RING) && (sLastPrinted.rtyp<END_RING)) |
---|
841 | { |
---|
842 | sLastPrinted.CleanUp(); |
---|
843 | memset(&sLastPrinted,0,sizeof(sleftv)); |
---|
844 | } |
---|
845 | currRing=NULL; |
---|
846 | currRingHdl=NULL; |
---|
847 | } |
---|
848 | else if (r->qideal!=NULL) |
---|
849 | { |
---|
850 | ring savecurrRing = currRing; |
---|
851 | rChangeCurrRing((ring)r,FALSE); |
---|
852 | idDelete(&r->qideal); |
---|
853 | r->qideal=NULL; |
---|
854 | if (savecurrRing!=NULL) rChangeCurrRing(savecurrRing,FALSE); |
---|
855 | } |
---|
856 | int i=1; |
---|
857 | int j; |
---|
858 | int *pi=r->order; |
---|
859 | for (j=0;j<iiRETURNEXPR_len;j++) |
---|
860 | { |
---|
861 | if (iiLocalRing[j]==r) |
---|
862 | { |
---|
863 | if (j<myynest) Warn("killing the basering for level %d",j); |
---|
864 | iiLocalRing[j]=NULL; |
---|
865 | } |
---|
866 | } |
---|
867 | if (pi!=NULL) |
---|
868 | { |
---|
869 | //while(*pi!=0) { pi++;i++; } |
---|
870 | i=rBlocks(r); |
---|
871 | Free((ADDRESS)r->order,i*sizeof(int)); |
---|
872 | Free((ADDRESS)r->block0,i*sizeof(int)); |
---|
873 | Free((ADDRESS)r->block1,i*sizeof(int)); |
---|
874 | for (j=0; j<i; j++) |
---|
875 | { |
---|
876 | if (r->wvhdl[j]!=NULL) |
---|
877 | FreeL(r->wvhdl[j]); |
---|
878 | } |
---|
879 | Free((ADDRESS)r->wvhdl,i*sizeof(short *)); |
---|
880 | if(r->names!=NULL) |
---|
881 | { |
---|
882 | for (i=0; i<r->N; i++) |
---|
883 | { |
---|
884 | FreeL((ADDRESS)r->names[i]); |
---|
885 | } |
---|
886 | Free((ADDRESS)r->names,r->N*sizeof(char *)); |
---|
887 | } |
---|
888 | if (r->parameter!=NULL) |
---|
889 | { |
---|
890 | int len=0; |
---|
891 | char **s=r->parameter; |
---|
892 | while (len<r->P) |
---|
893 | { |
---|
894 | FreeL((ADDRESS)*s); |
---|
895 | s++; |
---|
896 | len++; |
---|
897 | } |
---|
898 | Free((ADDRESS)r->parameter,r->P*sizeof(char *)); |
---|
899 | } |
---|
900 | } |
---|
901 | #ifdef TEST |
---|
902 | else |
---|
903 | PrintS("internal error: ring structure destroyed\n"); |
---|
904 | memset(r,0,sizeof(ip_sring)); |
---|
905 | #endif |
---|
906 | Free((ADDRESS)r,sizeof(ip_sring)); |
---|
907 | return; |
---|
908 | } |
---|
909 | r->ref--; |
---|
910 | } |
---|
911 | |
---|
912 | void rKill(idhdl h) |
---|
913 | { |
---|
914 | ring r = IDRING(h); |
---|
915 | if (r!=NULL) rKill(r); |
---|
916 | if (h==currRingHdl) |
---|
917 | { |
---|
918 | currRingHdl=idroot; |
---|
919 | while (currRingHdl!=NULL) |
---|
920 | { |
---|
921 | if ((currRingHdl!=h) |
---|
922 | && (IDTYP(currRingHdl)==IDTYP(h)) |
---|
923 | && (h->data.uring==currRingHdl->data.uring)) |
---|
924 | break; |
---|
925 | currRingHdl=IDNEXT(currRingHdl); |
---|
926 | } |
---|
927 | } |
---|
928 | } |
---|
929 | |
---|
930 | idhdl rFindHdl(ring r, idhdl n) |
---|
931 | { |
---|
932 | idhdl h=idroot; |
---|
933 | while (h!=NULL) |
---|
934 | { |
---|
935 | if (((IDTYP(h)==RING_CMD)||(IDTYP(h)==QRING_CMD)) |
---|
936 | && (h->data.uring==r) |
---|
937 | && (h!=n)) |
---|
938 | return h; |
---|
939 | h=IDNEXT(h); |
---|
940 | } |
---|
941 | return NULL; |
---|
942 | } |
---|
943 | |
---|
944 | int rOrderName(char * ordername) |
---|
945 | { |
---|
946 | int order=0; |
---|
947 | |
---|
948 | switch (*ordername) |
---|
949 | { |
---|
950 | case 'l': |
---|
951 | if (*(ordername+1)=='p') order = ringorder_lp; |
---|
952 | else if (*(ordername+1)=='s') order = ringorder_ls; |
---|
953 | break; |
---|
954 | case 'd': |
---|
955 | if (*(ordername+1)=='p') order = ringorder_dp; |
---|
956 | else if (*(ordername+1)=='s') order = ringorder_ds; |
---|
957 | break; |
---|
958 | case 'w': |
---|
959 | if (*(ordername+1)=='p') order = ringorder_wp; |
---|
960 | else if (*(ordername+1)=='s') order = ringorder_ws; |
---|
961 | break; |
---|
962 | case 'D': |
---|
963 | if (*(ordername+1)=='p') order = ringorder_Dp; |
---|
964 | else if (*(ordername+1)=='s') order = ringorder_Ds; |
---|
965 | break; |
---|
966 | case 'W': |
---|
967 | if (*(ordername+1)=='p') order = ringorder_Wp; |
---|
968 | else if (*(ordername+1)=='s') order = ringorder_Ws; |
---|
969 | break; |
---|
970 | case 'c': order = ringorder_c; break; |
---|
971 | case 'C': order = ringorder_C; break; |
---|
972 | case 'a': order = ringorder_a; break; |
---|
973 | case 'M': order = ringorder_M; break; |
---|
974 | default: break; |
---|
975 | } |
---|
976 | if (order==0) Werror("wrong ring order `%s`",ordername); |
---|
977 | FreeL((ADDRESS)ordername); |
---|
978 | return order; |
---|
979 | } |
---|
980 | |
---|
981 | char * rOrdStr(ring r) |
---|
982 | { |
---|
983 | int nblocks,l,i; |
---|
984 | |
---|
985 | for (nblocks=0; r->order[nblocks]; nblocks++); |
---|
986 | nblocks--; |
---|
987 | |
---|
988 | StringSetS(""); |
---|
989 | for (l=0; ; l++) |
---|
990 | { |
---|
991 | StringAppend("%c",(" acCMldDwWldDwW")[r->order[l]]); |
---|
992 | if (r->order[l]>=ringorder_lp) |
---|
993 | { |
---|
994 | if (r->order[l]>=ringorder_ls) |
---|
995 | StringAppendS("s"); |
---|
996 | else |
---|
997 | StringAppendS("p"); |
---|
998 | } |
---|
999 | if ((r->order[l] != ringorder_c) && (r->order[l] != ringorder_C)) |
---|
1000 | { |
---|
1001 | if (r->wvhdl[l]!=NULL) |
---|
1002 | { |
---|
1003 | StringAppendS("("); |
---|
1004 | for (int j= 0; |
---|
1005 | j<(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1); |
---|
1006 | j+=i+1) |
---|
1007 | { |
---|
1008 | char c=','; |
---|
1009 | for (i = 0; i<r->block1[l]-r->block0[l]; i++) |
---|
1010 | { |
---|
1011 | StringAppend("%d," ,r->wvhdl[l][i+j]); |
---|
1012 | } |
---|
1013 | if (r->order[l]!=ringorder_M) |
---|
1014 | { |
---|
1015 | StringAppend("%d)" ,r->wvhdl[l][i+j]); |
---|
1016 | break; |
---|
1017 | } |
---|
1018 | if (j+i+1==(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1)) |
---|
1019 | c=')'; |
---|
1020 | StringAppend("%d%c" ,r->wvhdl[l][i+j],c); |
---|
1021 | } |
---|
1022 | } |
---|
1023 | else |
---|
1024 | StringAppend("(%d)",r->block1[l]-r->block0[l]+1); |
---|
1025 | } |
---|
1026 | if (l==nblocks) return mstrdup(StringAppendS("")); |
---|
1027 | StringAppendS(","); |
---|
1028 | } |
---|
1029 | } |
---|
1030 | |
---|
1031 | char * rVarStr(ring r) |
---|
1032 | { |
---|
1033 | int i; |
---|
1034 | int l=2; |
---|
1035 | char *s; |
---|
1036 | |
---|
1037 | for (i=0; i<r->N; i++) |
---|
1038 | { |
---|
1039 | l+=strlen(r->names[i])+1; |
---|
1040 | } |
---|
1041 | s=(char *)AllocL(l); |
---|
1042 | s[0]='\0'; |
---|
1043 | for (i=0; i<r->N-1; i++) |
---|
1044 | { |
---|
1045 | strcat(s,r->names[i]); |
---|
1046 | strcat(s,","); |
---|
1047 | } |
---|
1048 | strcat(s,r->names[i]); |
---|
1049 | return s; |
---|
1050 | } |
---|
1051 | |
---|
1052 | char * rCharStr(ring r) |
---|
1053 | { |
---|
1054 | char *s; |
---|
1055 | int i; |
---|
1056 | |
---|
1057 | if (r->parameter==NULL) |
---|
1058 | { |
---|
1059 | i=r->ch; |
---|
1060 | if(i==-1) |
---|
1061 | s=mstrdup("real"); /* R */ |
---|
1062 | else |
---|
1063 | { |
---|
1064 | s=(char *)AllocL(6); |
---|
1065 | sprintf(s,"%d",i); /* Q, Z/p */ |
---|
1066 | } |
---|
1067 | return s; |
---|
1068 | } |
---|
1069 | int l=0; |
---|
1070 | for(i=0; i<r->P;i++) |
---|
1071 | { |
---|
1072 | l+=(strlen(r->parameter[i])+1); |
---|
1073 | } |
---|
1074 | s=(char *)AllocL(l+6); |
---|
1075 | s[0]='\0'; |
---|
1076 | if (r->ch<0) sprintf(s,"%d",-r->ch); /* Fp(a) */ |
---|
1077 | else if (r->ch==1) sprintf(s,"0"); /* Q(a) */ |
---|
1078 | else |
---|
1079 | { |
---|
1080 | sprintf(s,"%d,%s",r->ch,r->parameter[0]); /* Fq */ |
---|
1081 | return s; |
---|
1082 | } |
---|
1083 | char tt[2]; |
---|
1084 | tt[0]=','; |
---|
1085 | tt[1]='\0'; |
---|
1086 | for(i=0; i<r->P;i++) |
---|
1087 | { |
---|
1088 | strcat(s,tt); |
---|
1089 | strcat(s,r->parameter[i]); |
---|
1090 | } |
---|
1091 | return s; |
---|
1092 | } |
---|
1093 | |
---|
1094 | char * rParStr(ring r) |
---|
1095 | { |
---|
1096 | if (r->parameter==NULL) return mstrdup(""); |
---|
1097 | |
---|
1098 | int i; |
---|
1099 | int l=2; |
---|
1100 | |
---|
1101 | for (i=0; i<r->P; i++) |
---|
1102 | { |
---|
1103 | l+=strlen(r->parameter[i])+1; |
---|
1104 | } |
---|
1105 | char *s=(char *)AllocL(l); |
---|
1106 | s[0]='\0'; |
---|
1107 | for (i=0; i<r->P-1; i++) |
---|
1108 | { |
---|
1109 | strcat(s,r->parameter[i]); |
---|
1110 | strcat(s,","); |
---|
1111 | } |
---|
1112 | strcat(s,r->parameter[i]); |
---|
1113 | return s; |
---|
1114 | } |
---|
1115 | |
---|
1116 | char * rString(ring r) |
---|
1117 | { |
---|
1118 | char *ch=rCharStr(r); |
---|
1119 | char *var=rVarStr(r); |
---|
1120 | char *ord=rOrdStr(r); |
---|
1121 | char *res=(char *)AllocL(strlen(ch)+strlen(var)+strlen(ord)+9); |
---|
1122 | sprintf(res,"(%s),(%s),(%s)",ch,var,ord); |
---|
1123 | FreeL((ADDRESS)ch); |
---|
1124 | FreeL((ADDRESS)var); |
---|
1125 | FreeL((ADDRESS)ord); |
---|
1126 | return res; |
---|
1127 | } |
---|
1128 | |
---|
1129 | int rChar(ring r) |
---|
1130 | { |
---|
1131 | if (r->ch==-1) |
---|
1132 | return 0; |
---|
1133 | if (r->parameter==NULL) /* Q, Fp */ |
---|
1134 | return r->ch; |
---|
1135 | if (r->ch<0) /* Fp(a) */ |
---|
1136 | return -r->ch; |
---|
1137 | if (r->ch==1) /* Q(a) */ |
---|
1138 | return 0; |
---|
1139 | /*else*/ /* GF(p,n) */ |
---|
1140 | { |
---|
1141 | if ((r->ch & 1)==0) return 2; |
---|
1142 | int i=3; |
---|
1143 | while ((r->ch % i)!=0) i+=2; |
---|
1144 | return i; |
---|
1145 | } |
---|
1146 | } |
---|
1147 | |
---|
1148 | int rIsExtension(ring r) |
---|
1149 | { |
---|
1150 | if (r->parameter==NULL) /* Q, Fp */ |
---|
1151 | return FALSE; |
---|
1152 | else |
---|
1153 | return TRUE; |
---|
1154 | } |
---|
1155 | |
---|
1156 | int rIsExtension() |
---|
1157 | { |
---|
1158 | return rIsExtension( currRing ); |
---|
1159 | } |
---|
1160 | |
---|
1161 | /*2 |
---|
1162 | *returns -1 for not compatible, (sum is undefined) |
---|
1163 | * 0 for equal, (and sum) |
---|
1164 | * 1 for compatible (and sum) |
---|
1165 | */ |
---|
1166 | int rSum(ring r1, ring r2, ring &sum) |
---|
1167 | { |
---|
1168 | if (r1==r2) |
---|
1169 | { |
---|
1170 | sum=r1; |
---|
1171 | r1->ref++; |
---|
1172 | return 0; |
---|
1173 | } |
---|
1174 | ip_sring tmpR; |
---|
1175 | memset(&tmpR,0,sizeof(tmpR)); |
---|
1176 | /* check coeff. field =====================================================*/ |
---|
1177 | if (r1->ch==r2->ch) |
---|
1178 | { |
---|
1179 | tmpR.ch=r1->ch; |
---|
1180 | if ((r1->ch==0)||(r1->ch>=2)) /* Q, Z/p, GF(p,n) */ |
---|
1181 | { |
---|
1182 | if (r1->parameter!=NULL) |
---|
1183 | { |
---|
1184 | if (strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1185 | { |
---|
1186 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1187 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1188 | tmpR.P=1; |
---|
1189 | } |
---|
1190 | else |
---|
1191 | { |
---|
1192 | WerrorS("GF(p,n)+GF(p,n)"); |
---|
1193 | return -1; |
---|
1194 | } |
---|
1195 | } |
---|
1196 | } |
---|
1197 | else if ((r1->ch==1)||(r1->ch<-1)) /* Q(a),Z/p(a) */ |
---|
1198 | { |
---|
1199 | if (r1->minpoly!=NULL) |
---|
1200 | { |
---|
1201 | if (r2->minpoly!=NULL) |
---|
1202 | { |
---|
1203 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1204 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1205 | && naEqual(r1->minpoly,r2->minpoly)) |
---|
1206 | { |
---|
1207 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1208 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1209 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1210 | tmpR.P=1; |
---|
1211 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1212 | } |
---|
1213 | else |
---|
1214 | { |
---|
1215 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1216 | WerrorS("different minpolys"); |
---|
1217 | return -1; |
---|
1218 | } |
---|
1219 | } |
---|
1220 | else |
---|
1221 | { |
---|
1222 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1223 | && (r2->P==1)) |
---|
1224 | { |
---|
1225 | tmpR.parameter=(char **)Alloc0(sizeof(char *)); |
---|
1226 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1227 | tmpR.P=1; |
---|
1228 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1229 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1230 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1231 | } |
---|
1232 | else |
---|
1233 | { |
---|
1234 | WerrorS("different parameters and minpoly!=0"); |
---|
1235 | return -1; |
---|
1236 | } |
---|
1237 | } |
---|
1238 | } |
---|
1239 | else /* r1->minpoly==NULL */ |
---|
1240 | { |
---|
1241 | if (r2->minpoly!=NULL) |
---|
1242 | { |
---|
1243 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1244 | && (r1->P==1)) |
---|
1245 | { |
---|
1246 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1247 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1248 | tmpR.P=1; |
---|
1249 | nSetChar(r2->ch,TRUE,r2->parameter,r2->P); |
---|
1250 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1251 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1252 | } |
---|
1253 | else |
---|
1254 | { |
---|
1255 | WerrorS("different parameters and minpoly!=0"); |
---|
1256 | return -1; |
---|
1257 | } |
---|
1258 | } |
---|
1259 | else |
---|
1260 | { |
---|
1261 | int len=rPar(r1)+rPar(r2); |
---|
1262 | tmpR.parameter=(char **)Alloc(len*sizeof(char *)); |
---|
1263 | int i; |
---|
1264 | for (i=0;i<r1->P;i++) |
---|
1265 | { |
---|
1266 | tmpR.parameter[i]=mstrdup(r1->parameter[i]); |
---|
1267 | } |
---|
1268 | int j,l; |
---|
1269 | for(j=0;j<r2->P;j++) |
---|
1270 | { |
---|
1271 | for(l=0;l<i;l++) |
---|
1272 | { |
---|
1273 | if(strcmp(tmpR.parameter[l],r2->parameter[j])==0) |
---|
1274 | break; |
---|
1275 | } |
---|
1276 | if (l==i) |
---|
1277 | { |
---|
1278 | tmpR.parameter[i]=mstrdup(r2->parameter[j]); |
---|
1279 | i++; |
---|
1280 | } |
---|
1281 | } |
---|
1282 | if (i!=len) |
---|
1283 | { |
---|
1284 | ReAlloc(tmpR.parameter,len*sizeof(char *),i*sizeof(char *)); |
---|
1285 | } |
---|
1286 | } |
---|
1287 | } |
---|
1288 | } |
---|
1289 | } |
---|
1290 | else /* r1->ch!=r2->ch */ |
---|
1291 | { |
---|
1292 | if (r1->ch<-1) /* Z/p(a) */ |
---|
1293 | { |
---|
1294 | if ((r2->ch==0) /* Q */ |
---|
1295 | || (r2->ch==-r1->ch)) /* Z/p */ |
---|
1296 | { |
---|
1297 | tmpR.ch=r1->ch; |
---|
1298 | tmpR.parameter=(char **)Alloc(rPar(r1)*sizeof(char *)); |
---|
1299 | tmpR.P=r1->P; |
---|
1300 | memcpy(tmpR.parameter,r1->parameter,rPar(r1)*sizeof(char *)); |
---|
1301 | if (r1->minpoly!=NULL) |
---|
1302 | { |
---|
1303 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1304 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1305 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1306 | } |
---|
1307 | } |
---|
1308 | else /* R, Q(a),Z/q,Z/p(a),GF(p,n) */ |
---|
1309 | { |
---|
1310 | WerrorS("Z/p(a)+(R,Q(a),Z/q(a),GF(q,n))"); |
---|
1311 | return -1; |
---|
1312 | } |
---|
1313 | } |
---|
1314 | else if (r1->ch==-1) /* R */ |
---|
1315 | { |
---|
1316 | WerrorS("R+.."); |
---|
1317 | return -1; |
---|
1318 | } |
---|
1319 | else if (r1->ch==0) /* Q */ |
---|
1320 | { |
---|
1321 | if ((r2->ch<-1)||(r2->ch==1)) /* Z/p(a),Q(a) */ |
---|
1322 | { |
---|
1323 | tmpR.ch=r2->ch; |
---|
1324 | tmpR.P=r2->P; |
---|
1325 | tmpR.parameter=(char **)Alloc(rPar(r2)*sizeof(char *)); |
---|
1326 | memcpy(tmpR.parameter,r2->parameter,rPar(r2)*sizeof(char *)); |
---|
1327 | if (r2->minpoly!=NULL) |
---|
1328 | { |
---|
1329 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1330 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1331 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1332 | } |
---|
1333 | } |
---|
1334 | else if (r2->ch>1) /* Z/p,GF(p,n) */ |
---|
1335 | { |
---|
1336 | tmpR.ch=r2->ch; |
---|
1337 | if (r2->parameter!=NULL) |
---|
1338 | { |
---|
1339 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1340 | tmpR.P=1; |
---|
1341 | tmpR.parameter[0]=mstrdup(r2->parameter[0]); |
---|
1342 | } |
---|
1343 | } |
---|
1344 | else |
---|
1345 | { |
---|
1346 | WerrorS("Q+R"); |
---|
1347 | return -1; /* R */ |
---|
1348 | } |
---|
1349 | } |
---|
1350 | else if (r1->ch==1) /* Q(a) */ |
---|
1351 | { |
---|
1352 | if (r2->ch==0) /* Q */ |
---|
1353 | { |
---|
1354 | tmpR.ch=r1->ch; |
---|
1355 | tmpR.P=rPar(r1); |
---|
1356 | tmpR.parameter=(char **)Alloc0(rPar(r1)*sizeof(char *)); |
---|
1357 | int i; |
---|
1358 | for(i=0;i<r1->P;i++) |
---|
1359 | { |
---|
1360 | tmpR.parameter[i]=mstrdup(r1->parameter[i]); |
---|
1361 | } |
---|
1362 | if (r1->minpoly!=NULL) |
---|
1363 | { |
---|
1364 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1365 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1366 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1367 | } |
---|
1368 | } |
---|
1369 | else /* R, Z/p,GF(p,n) */ |
---|
1370 | { |
---|
1371 | WerrorS("Q(a)+(R,Z/p,GF(p,n))"); |
---|
1372 | return -1; |
---|
1373 | } |
---|
1374 | } |
---|
1375 | else /* r1->ch >=2 , Z/p */ |
---|
1376 | { |
---|
1377 | if (r2->ch==0) /* Q */ |
---|
1378 | { |
---|
1379 | tmpR.ch=r1->ch; |
---|
1380 | } |
---|
1381 | else if (r2->ch==-r1->ch) /* Z/p(a) */ |
---|
1382 | { |
---|
1383 | tmpR.ch=r2->ch; |
---|
1384 | tmpR.P=rPar(r2); |
---|
1385 | tmpR.parameter=(char **)Alloc(rPar(r2)*sizeof(char *)); |
---|
1386 | int i; |
---|
1387 | for(i=0;i<r2->P;i++) |
---|
1388 | { |
---|
1389 | tmpR.parameter[i]=mstrdup(r2->parameter[i]); |
---|
1390 | } |
---|
1391 | if (r2->minpoly!=NULL) |
---|
1392 | { |
---|
1393 | nSetChar(r2->ch,TRUE,r2->parameter,r2->P); |
---|
1394 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1395 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1396 | } |
---|
1397 | } |
---|
1398 | else |
---|
1399 | { |
---|
1400 | WerrorS("Z/p+(GF(q,n),Z/q(a),R,Q(a))"); |
---|
1401 | return -1; /* GF(p,n),Z/q(a),R,Q(a) */ |
---|
1402 | } |
---|
1403 | } |
---|
1404 | } |
---|
1405 | /* variable names ========================================================*/ |
---|
1406 | int i,j,k; |
---|
1407 | int l=r1->N+r2->N; |
---|
1408 | char **names=(char **)Alloc0(l*sizeof(char*)); |
---|
1409 | k=0; |
---|
1410 | |
---|
1411 | // collect all varnames from r1, except those which are parameters |
---|
1412 | // of r2, or those which are the empty string |
---|
1413 | for (i=0;i<r1->N;i++) |
---|
1414 | { |
---|
1415 | BOOLEAN b=TRUE; |
---|
1416 | |
---|
1417 | if (*(r1->names[i]) == '\0') |
---|
1418 | b = FALSE; |
---|
1419 | else if ((r2->parameter!=NULL) && (strlen(r1->names[i])==1)) |
---|
1420 | { |
---|
1421 | for(j=0;j<r2->P;j++) |
---|
1422 | { |
---|
1423 | if (strcmp(r1->names[i],r2->parameter[j])==0) |
---|
1424 | { |
---|
1425 | b=FALSE; |
---|
1426 | break; |
---|
1427 | } |
---|
1428 | } |
---|
1429 | } |
---|
1430 | |
---|
1431 | if (b) |
---|
1432 | { |
---|
1433 | //Print("name : %d: %s\n",k,r1->names[i]); |
---|
1434 | names[k]=mstrdup(r1->names[i]); |
---|
1435 | k++; |
---|
1436 | } |
---|
1437 | //else |
---|
1438 | // Print("no name (par1) %s\n",r1->names[i]); |
---|
1439 | } |
---|
1440 | // Add variables from r2, except those which are parameters of r1 |
---|
1441 | // those which are empty strings, and those which equal a var of r1 |
---|
1442 | for(i=0;i<r2->N;i++) |
---|
1443 | { |
---|
1444 | BOOLEAN b=TRUE; |
---|
1445 | |
---|
1446 | if (*(r2->names[i]) == '\0') |
---|
1447 | b = FALSE; |
---|
1448 | else if ((r1->parameter!=NULL) && (strlen(r2->names[i])==1)) |
---|
1449 | { |
---|
1450 | for(j=0;j<r1->P;j++) |
---|
1451 | { |
---|
1452 | if (strcmp(r2->names[i],r1->parameter[j])==0) |
---|
1453 | { |
---|
1454 | b=FALSE; |
---|
1455 | break; |
---|
1456 | } |
---|
1457 | } |
---|
1458 | } |
---|
1459 | |
---|
1460 | if (b) |
---|
1461 | { |
---|
1462 | for(j=0;j<r1->N;j++) |
---|
1463 | { |
---|
1464 | if (strcmp(r1->names[j],r2->names[i])==0) |
---|
1465 | { |
---|
1466 | b=FALSE; |
---|
1467 | break; |
---|
1468 | } |
---|
1469 | } |
---|
1470 | if (b) |
---|
1471 | { |
---|
1472 | names[k]=mstrdup(r2->names[i]); |
---|
1473 | //Print("name : %d : %s\n",k,r2->names[i]); |
---|
1474 | k++; |
---|
1475 | } |
---|
1476 | //else |
---|
1477 | // Print("no name (var): %s\n",r2->names[i]); |
---|
1478 | } |
---|
1479 | //else |
---|
1480 | // Print("no name (par): %s\n",r2->names[i]); |
---|
1481 | } |
---|
1482 | // check whether we found any vars at all |
---|
1483 | if (k == 0) |
---|
1484 | { |
---|
1485 | names[k]=mstrdup(""); |
---|
1486 | k=1; |
---|
1487 | } |
---|
1488 | tmpR.N=k; |
---|
1489 | tmpR.names=names; |
---|
1490 | /* ordering *======================================================== */ |
---|
1491 | tmpR.OrdSgn=1; |
---|
1492 | if ((r1->order[0]==ringorder_unspec) |
---|
1493 | && (r2->order[0]==ringorder_unspec)) |
---|
1494 | { |
---|
1495 | tmpR.order=(int*)Alloc(3*sizeof(int)); |
---|
1496 | tmpR.block0=(int*)Alloc(3*sizeof(int)); |
---|
1497 | tmpR.block1=(int*)Alloc(3*sizeof(int)); |
---|
1498 | tmpR.wvhdl=(short**)Alloc0(3*sizeof(short*)); |
---|
1499 | tmpR.order[0]=ringorder_unspec; |
---|
1500 | tmpR.order[1]=ringorder_C; |
---|
1501 | tmpR.order[2]=0; |
---|
1502 | tmpR.block0[0]=1; |
---|
1503 | tmpR.block1[0]=tmpR.N; |
---|
1504 | } |
---|
1505 | else if (l==k) /* r3=r1+r2 */ |
---|
1506 | { |
---|
1507 | int b; |
---|
1508 | ring rb; |
---|
1509 | if (r1->order[0]==ringorder_unspec) |
---|
1510 | { |
---|
1511 | /* extend order of r2 to r3 */ |
---|
1512 | b=rBlocks(r2); |
---|
1513 | rb=r2; |
---|
1514 | tmpR.OrdSgn=r2->OrdSgn; |
---|
1515 | } |
---|
1516 | else if (r2->order[0]==ringorder_unspec) |
---|
1517 | { |
---|
1518 | /* extend order of r1 to r3 */ |
---|
1519 | b=rBlocks(r1); |
---|
1520 | rb=r1; |
---|
1521 | tmpR.OrdSgn=r1->OrdSgn; |
---|
1522 | } |
---|
1523 | else |
---|
1524 | { |
---|
1525 | b=rBlocks(r1)+rBlocks(r2)-2; /* for only one order C, only one 0 */ |
---|
1526 | rb=NULL; |
---|
1527 | } |
---|
1528 | tmpR.order=(int*)Alloc0(b*sizeof(int)); |
---|
1529 | tmpR.block0=(int*)Alloc0(b*sizeof(int)); |
---|
1530 | tmpR.block1=(int*)Alloc0(b*sizeof(int)); |
---|
1531 | tmpR.wvhdl=(short**)Alloc0(b*sizeof(short*)); |
---|
1532 | /* weights not implemented yet ...*/ |
---|
1533 | if (rb!=NULL) |
---|
1534 | { |
---|
1535 | for (i=0;i<b;i++) |
---|
1536 | { |
---|
1537 | tmpR.order[i]=rb->order[i]; |
---|
1538 | tmpR.block0[i]=rb->block0[i]; |
---|
1539 | tmpR.block1[i]=rb->block1[i]; |
---|
1540 | } |
---|
1541 | tmpR.block0[0]=1; |
---|
1542 | } |
---|
1543 | else /* ring sum for complete rings */ |
---|
1544 | { |
---|
1545 | for (i=0;r1->order[i]!=0;i++) |
---|
1546 | { |
---|
1547 | tmpR.order[i]=r1->order[i]; |
---|
1548 | tmpR.block0[i]=r1->block0[i]; |
---|
1549 | tmpR.block1[i]=r1->block1[i]; |
---|
1550 | } |
---|
1551 | j=i; |
---|
1552 | i--; |
---|
1553 | if ((r1->order[i]==ringorder_c) |
---|
1554 | ||(r1->order[i]==ringorder_C)) |
---|
1555 | { |
---|
1556 | j--; |
---|
1557 | tmpR.order[b-2]=r1->order[i]; |
---|
1558 | } |
---|
1559 | for (i=0;r2->order[i]!=0;i++,j++) |
---|
1560 | { |
---|
1561 | if ((r2->order[i]!=ringorder_c) |
---|
1562 | &&(r2->order[i]!=ringorder_C)) |
---|
1563 | { |
---|
1564 | tmpR.order[j]=r2->order[i]; |
---|
1565 | tmpR.block0[j]=r2->block0[i]+r1->N; |
---|
1566 | tmpR.block1[j]=r2->block1[i]+r1->N; |
---|
1567 | } |
---|
1568 | } |
---|
1569 | if((r1->OrdSgn==-1)||(r2->OrdSgn==-1)) |
---|
1570 | tmpR.OrdSgn=-1; |
---|
1571 | } |
---|
1572 | } |
---|
1573 | else if ((k==r1->N) && (k==r2->N)) /* r1 and r2 are "quite" the same ring */ |
---|
1574 | /* copy r1, because we have the variables from r1 */ |
---|
1575 | { |
---|
1576 | int b=rBlocks(r1); |
---|
1577 | |
---|
1578 | tmpR.order=(int*)Alloc0(b*sizeof(int)); |
---|
1579 | tmpR.block0=(int*)Alloc0(b*sizeof(int)); |
---|
1580 | tmpR.block1=(int*)Alloc0(b*sizeof(int)); |
---|
1581 | tmpR.wvhdl=(short**)Alloc0(b*sizeof(short*)); |
---|
1582 | /* weights not implemented yet ...*/ |
---|
1583 | for (i=0;i<b;i++) |
---|
1584 | { |
---|
1585 | tmpR.order[i]=r1->order[i]; |
---|
1586 | tmpR.block0[i]=r1->block0[i]; |
---|
1587 | tmpR.block1[i]=r1->block1[i]; |
---|
1588 | } |
---|
1589 | tmpR.OrdSgn=r1->OrdSgn; |
---|
1590 | } |
---|
1591 | else |
---|
1592 | { |
---|
1593 | for(i=0;i<k;i++) FreeL((ADDRESS)tmpR.names[i]); |
---|
1594 | Free((ADDRESS)names,tmpR.N*sizeof(char *)); |
---|
1595 | Werror("difficulties with variables: %d,%d -> %d",r1->N,r2->N,k); |
---|
1596 | return -1; |
---|
1597 | } |
---|
1598 | sum=(ring)Alloc(sizeof(ip_sring)); |
---|
1599 | memcpy(sum,&tmpR,sizeof(ip_sring)); |
---|
1600 | rComplete(sum); |
---|
1601 | return 1; |
---|
1602 | } |
---|
1603 | |
---|
1604 | /*2 |
---|
1605 | * create a copy of the ring r, which must be equivalent to currRing |
---|
1606 | * used for qring definition,.. |
---|
1607 | * (i.e.: normal rings: same nCopy as currRing; |
---|
1608 | * qring: same nCopy, same idCopy as currRing) |
---|
1609 | */ |
---|
1610 | ring rCopy(ring r) |
---|
1611 | { |
---|
1612 | int i,j; |
---|
1613 | int *pi; |
---|
1614 | ring res=(ring)Alloc(sizeof(ip_sring)); |
---|
1615 | |
---|
1616 | memcpy4(res,r,sizeof(ip_sring)); |
---|
1617 | if (r->parameter!=NULL) |
---|
1618 | { |
---|
1619 | res->minpoly=nCopy(r->minpoly); |
---|
1620 | int l=rPar(r); |
---|
1621 | res->parameter=(char **)Alloc(l*sizeof(char *)); |
---|
1622 | int i; |
---|
1623 | for(i=0;i<r->P;i++) |
---|
1624 | { |
---|
1625 | res->parameter[i]=mstrdup(r->parameter[i]); |
---|
1626 | } |
---|
1627 | } |
---|
1628 | res->names = (char **)Alloc(r->N * sizeof(char *)); |
---|
1629 | i=1; |
---|
1630 | pi=r->order; |
---|
1631 | while ((*pi)!=0) { i++;pi++; } |
---|
1632 | res->wvhdl = (short **)Alloc(i * sizeof(short *)); |
---|
1633 | res->order = (int *) Alloc(i * sizeof(int)); |
---|
1634 | res->block0 = (int *) Alloc(i * sizeof(int)); |
---|
1635 | res->block1 = (int *) Alloc(i * sizeof(int)); |
---|
1636 | for (j=0; j<i; j++) |
---|
1637 | { |
---|
1638 | if (r->wvhdl[j]!=NULL) |
---|
1639 | { |
---|
1640 | res->wvhdl[j]=(short*)AllocL(mmSizeL((ADDRESS)r->wvhdl[j])); |
---|
1641 | memcpy(res->wvhdl[j],r->wvhdl[j],mmSizeL((ADDRESS)r->wvhdl[j])); |
---|
1642 | } |
---|
1643 | else |
---|
1644 | res->wvhdl[j]=NULL; |
---|
1645 | } |
---|
1646 | memcpy4(res->order,r->order,i * sizeof(int)); |
---|
1647 | memcpy4(res->block0,r->block0,i * sizeof(int)); |
---|
1648 | memcpy4(res->block1,r->block1,i * sizeof(int)); |
---|
1649 | for (i=0; i<res->N; i++) |
---|
1650 | { |
---|
1651 | res->names[i] = mstrdup(r->names[i]); |
---|
1652 | } |
---|
1653 | res->idroot = NULL; |
---|
1654 | if (r->qideal!=NULL) res->qideal= idCopy(r->qideal); |
---|
1655 | |
---|
1656 | #ifdef RDEBUG |
---|
1657 | rNumber++; |
---|
1658 | res->no=rNumber; |
---|
1659 | #endif |
---|
1660 | |
---|
1661 | return res; |
---|
1662 | } |
---|
1663 | |
---|
1664 | rOrderType_t rGetOrderType(ring r) |
---|
1665 | { |
---|
1666 | // check for simple ordering |
---|
1667 | if (rHasSimpleOrder(r)) |
---|
1668 | { |
---|
1669 | if ((r->order[1] == ringorder_c) || (r->order[1] == ringorder_C)) |
---|
1670 | { |
---|
1671 | switch(r->order[0]) |
---|
1672 | { |
---|
1673 | case ringorder_dp: |
---|
1674 | case ringorder_wp: |
---|
1675 | case ringorder_ds: |
---|
1676 | case ringorder_ws: |
---|
1677 | case ringorder_ls: |
---|
1678 | case ringorder_unspec: |
---|
1679 | if (r->order[1] == ringorder_C || r->order[0] == ringorder_unspec) |
---|
1680 | return rOrderType_ExpComp; |
---|
1681 | return rOrderType_Exp; |
---|
1682 | |
---|
1683 | default: |
---|
1684 | assume(r->order[0] == ringorder_lp || |
---|
1685 | r->order[0] == ringorder_Dp || |
---|
1686 | r->order[0] == ringorder_Wp || |
---|
1687 | r->order[0] == ringorder_Ds || |
---|
1688 | r->order[0] == ringorder_Ws); |
---|
1689 | |
---|
1690 | if (r->order[1] == ringorder_c) return rOrderType_ExpComp; |
---|
1691 | return rOrderType_Exp; |
---|
1692 | } |
---|
1693 | } |
---|
1694 | else |
---|
1695 | { |
---|
1696 | assume((r->order[0]==ringorder_c)||(r->order[0]==ringorder_C)); |
---|
1697 | return rOrderType_CompExp; |
---|
1698 | } |
---|
1699 | } |
---|
1700 | else |
---|
1701 | return rOrderType_General; |
---|
1702 | } |
---|
1703 | |
---|
1704 | BOOLEAN rHasSimpleOrder(ring r) |
---|
1705 | { |
---|
1706 | return |
---|
1707 | (r->order[0] == ringorder_unspec) || |
---|
1708 | ((r->order[2] == 0) && |
---|
1709 | (r->order[1] != ringorder_M && |
---|
1710 | r->order[0] != ringorder_M)); |
---|
1711 | } |
---|
1712 | // returns TRUE, if simple lp or ls ordering |
---|
1713 | BOOLEAN rHasSimpleLexOrder(ring r) |
---|
1714 | { |
---|
1715 | return rHasSimpleOrder(r) && |
---|
1716 | (r->order[0] == ringorder_ls || |
---|
1717 | r->order[0] == ringorder_lp || |
---|
1718 | r->order[1] == ringorder_ls || |
---|
1719 | r->order[1] == ringorder_lp); |
---|
1720 | } |
---|
1721 | |
---|
1722 | |
---|