1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* $Id: ring.cc,v 1.15 1998-02-16 09:46:55 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 | currRing->no =rNumber; rNumber++; |
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191 | #endif |
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192 | #ifdef SRING |
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193 | currRing->partN = 4; |
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194 | #endif |
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195 | /*names*/ |
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196 | currRing->names = (char **) Alloc(3 * sizeof(char *)); |
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197 | currRing->names[0] = mstrdup("x"); |
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198 | currRing->names[1] = mstrdup("y"); |
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199 | currRing->names[2] = mstrdup("z"); |
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200 | /*weights: entries for 3 blocks: NULL*/ |
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201 | currRing->wvhdl = (short **)Alloc0(3 * sizeof(short *)); |
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202 | /*order: dp,C,0*/ |
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203 | currRing->order = (int *) Alloc(3 * sizeof(int *)); |
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204 | currRing->block0 = (int *)Alloc(3 * sizeof(int *)); |
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205 | currRing->block1 = (int *)Alloc(3 * sizeof(int *)); |
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206 | /* ringorder dp for the first block: var 1..3 */ |
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207 | currRing->order[0] = ringorder_dp; |
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208 | currRing->block0[0] = 1; |
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209 | currRing->block1[0] = 3; |
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210 | /* ringorder C for the second block: no vars */ |
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211 | currRing->order[1] = ringorder_C; |
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212 | currRing->block0[1] = 0; |
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213 | currRing->block1[1] = 0; |
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214 | /* the last block: everything is 0 */ |
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215 | currRing->order[2] = 0; |
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216 | currRing->block0[2] = 0; |
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217 | currRing->block1[2] = 0; |
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218 | /*polynomial ring*/ |
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219 | currRing->OrdSgn = 1; |
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220 | |
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221 | /* complete ring intializations */ |
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222 | #ifdef COMP_FAST |
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223 | rComplete(currRing); |
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224 | #endif |
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225 | rSetHdl(tmp,TRUE); |
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226 | return currRingHdl; |
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227 | } |
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228 | |
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229 | /*2 |
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230 | *check intvec, describing the ordering |
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231 | */ |
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232 | BOOLEAN rCheckIV(intvec *iv) |
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233 | { |
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234 | if ((iv->length()!=2)&&(iv->length()!=3)) |
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235 | { |
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236 | WerrorS("weights only for orderings wp,ws,Wp,Ws,a,M"); |
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237 | return TRUE; |
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238 | } |
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239 | return FALSE; |
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240 | } |
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241 | |
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242 | static int rTypeOfMatrixOrder(intvec * order) |
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243 | { |
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244 | int i=0,j,typ=1; |
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245 | int sz = (int)sqrt((double)(order->length()-2)); |
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246 | |
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247 | while ((i<sz) && (typ==1)) |
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248 | { |
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249 | j=0; |
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250 | while ((j<sz) && ((*order)[j*sz+i+2]==0)) j++; |
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251 | if (j>=sz) |
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252 | { |
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253 | typ = 0; |
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254 | WerrorS("Matrix order not complete"); |
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255 | } |
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256 | else if ((*order)[j*sz+i+2]<0) |
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257 | typ = -1; |
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258 | else |
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259 | i++; |
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260 | } |
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261 | return typ; |
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262 | } |
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263 | |
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264 | /*2 |
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265 | * define a new ring from the data: |
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266 | *s: name, chr: ch, parameter names (or NULL): pn, |
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267 | *varnames: rv, ordering: ord, typ: typ |
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268 | */ |
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269 | idhdl rInit(char *s, sleftv* pn, sleftv* rv, sleftv* ord, |
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270 | BOOLEAN isDRing) |
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271 | { |
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272 | int ch; |
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273 | if (pn->Typ()==INT_CMD) |
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274 | { |
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275 | ch=(int)pn->Data(); |
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276 | } |
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277 | else if (strcmp(pn->name,"real")==0) |
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278 | { |
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279 | ch=-1; |
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280 | } |
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281 | else |
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282 | { |
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283 | pn->CleanUp(); |
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284 | rv->CleanUp(); |
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285 | ord->CleanUp(); |
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286 | return NULL; |
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287 | } |
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288 | pn=pn->next; |
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289 | |
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290 | int l, last; |
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291 | int typ = 1; |
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292 | sleftv * sl; |
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293 | idhdl tmp; |
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294 | ip_sring tmpR; |
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295 | BOOLEAN ffChar=FALSE; |
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296 | /*every entry in the new ring is initialized to 0*/ |
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297 | |
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298 | /* characteristic -----------------------------------------------*/ |
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299 | /* input: 0 ch=0 : Q parameter=NULL ffChar=FALSE |
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300 | * 0 1 : Q(a,...) *names FALSE |
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301 | * 0 -1 : R NULL FALSE |
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302 | * p p : Fp NULL FALSE |
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303 | * p -p : Fp(a) *names FALSE |
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304 | * q q : GF(q=p^n) *names TRUE |
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305 | */ |
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306 | if (ch!=-1) |
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307 | { |
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308 | if ((ch!=0) &&((ch<2) || (ch > 32003))) |
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309 | { |
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310 | ch=32003; |
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311 | } |
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312 | l=0; |
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313 | if (pn!=NULL) |
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314 | { |
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315 | while ((ch!=fftable[l]) && (fftable[l])) l++; |
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316 | if (fftable[l]==0) |
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317 | { |
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318 | ch = IsPrime(ch); |
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319 | } |
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320 | else |
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321 | { |
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322 | char *m[1]={(char *)sNoName}; |
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323 | nfSetChar(ch,m); |
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324 | if(errorreported) |
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325 | { |
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326 | errorreported=0; |
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327 | ch=IsPrime(ch); |
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328 | } |
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329 | else |
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330 | { |
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331 | ffChar=TRUE; |
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332 | } |
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333 | } |
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334 | } |
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335 | else |
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336 | { |
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337 | ch = IsPrime(ch); |
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338 | } |
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339 | } |
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340 | memset(&tmpR,0,sizeof(tmpR)); |
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341 | |
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342 | tmpR.ch = ch; |
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343 | |
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344 | /* parameter -------------------------------------------------------*/ |
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345 | sleftv* hs; |
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346 | const char* h; |
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347 | |
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348 | if ((pn!=NULL)&& (ffChar||(ch==-1))) |
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349 | { |
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350 | if((ffChar && (pn->next!=NULL)) |
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351 | || (ch==-1)) |
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352 | { |
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353 | WarnS("too many parameters"); |
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354 | if (ffChar) hs=pn->next; |
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355 | else hs=pn; |
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356 | hs->CleanUp(); |
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357 | if (ffChar) |
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358 | { |
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359 | pn->next=NULL; |
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360 | Free((ADDRESS)hs,sizeof(sleftv)); |
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361 | } |
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362 | else pn=NULL; |
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363 | } |
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364 | } |
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365 | /* a tempory pointer for typ conversion |
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366 | * and for deallocating sleftv*-lists: |
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367 | * don't deallocate the first but all other entries*/ |
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368 | |
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369 | if (pn!=NULL) |
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370 | { |
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371 | tmpR.P=pn->listLength(); |
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372 | if((ffChar && (tmpR.P>1)) |
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373 | || ((ch==-1) && (tmpR.P>0))) |
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374 | { |
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375 | tmpR.P=ffChar; /* GF(q): 1, R: 0 */ |
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376 | WarnS("too many parameters"); |
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377 | if (ffChar) hs=pn->next; |
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378 | else hs=pn; |
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379 | hs->CleanUp(); |
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380 | Free((ADDRESS)hs,sizeof(sleftv)); |
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381 | if (ffChar) pn->next=NULL; |
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382 | else pn=NULL; |
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383 | } |
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384 | tmpR.parameter=(char**)Alloc(tmpR.P*sizeof(char *)); |
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385 | sl=pn; |
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386 | char** p=tmpR.parameter; |
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387 | while(sl!=NULL) |
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388 | { |
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389 | hs=NULL; |
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390 | h=sl->Name(); |
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391 | if ((h==sNoName)&&(sl->Typ()==POLY_CMD)) |
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392 | { |
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393 | hs=(leftv)Alloc(sizeof(sleftv)); |
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394 | iiConvert(POLY_CMD,ANY_TYPE,-1,sl,hs); |
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395 | sl->next=hs->next; |
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396 | hs->next=NULL; |
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397 | h=hs->Name(); |
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398 | } |
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399 | if (h==sNoName) |
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400 | { |
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401 | WerrorS("parameter expected"); |
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402 | pn->CleanUp(); |
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403 | rv->CleanUp(); |
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404 | ord->CleanUp(); |
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405 | return NULL; |
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406 | } |
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407 | *p=mstrdup(h); |
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408 | p++; |
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409 | if (hs!=NULL) |
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410 | { |
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411 | hs->CleanUp(); |
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412 | Free((ADDRESS)hs,sizeof(sleftv)); |
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413 | } |
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414 | hs=sl; |
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415 | sl=sl->next; |
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416 | hs->next=NULL; |
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417 | hs->CleanUp(); |
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418 | if (hs!=pn) Free((ADDRESS)hs,sizeof(sleftv)); |
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419 | } |
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420 | if ((ch>1) && /*(pn!=NULL) &&*/ (!ffChar)) tmpR.ch=-tmpR.ch; |
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421 | if (ch==0) tmpR.ch=1; |
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422 | } |
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423 | |
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424 | /* names and number of variables-------------------------------------*/ |
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425 | { |
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426 | int i, n; |
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427 | sl = rv; |
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428 | #ifdef DRING |
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429 | char *tmpname=NULL; |
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430 | #endif |
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431 | n=rv->listLength(); |
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432 | tmpR.N = n; |
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433 | #ifdef SDRING |
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434 | tmpR.partN=n+1-isDRing; // set to N+1 for SRING, N for DRING |
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435 | if (isDRing) n=2*n+1; |
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436 | #endif |
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437 | tmpR.N = n; |
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438 | tmpR.names = (char **)Alloc(n * sizeof(char *)); |
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439 | for (sl=rv, i=0; i<n; i++) |
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440 | { |
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441 | hs=NULL; |
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442 | #ifdef DRING |
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443 | if (sl==NULL) |
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444 | { |
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445 | if (i==tmpR.N-1) |
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446 | tmpname=mstrdup(""); |
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447 | else |
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448 | { |
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449 | tmpname=(char*)AllocL(strlen(tmpR.names[i-tmpR.partN])+2); |
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450 | strcpy(tmpname,"d"); |
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451 | strcat(tmpname,tmpR.names[i-tmpR.partN]); |
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452 | } |
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453 | h=tmpname; |
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454 | } |
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455 | else |
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456 | #endif |
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457 | h=sl->Name(); |
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458 | if ((h==sNoName)&&(sl->Typ()==POLY_CMD)) |
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459 | { |
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460 | hs=(leftv)Alloc(sizeof(sleftv)); |
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461 | iiConvert(POLY_CMD,ANY_TYPE,-1,sl,hs); |
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462 | sl->next=hs->next; |
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463 | hs->next=NULL; |
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464 | h=hs->Name(); |
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465 | } |
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466 | if (h==sNoName) |
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467 | { |
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468 | WerrorS("expected name of ring variable"); |
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469 | sl->CleanUp(); |
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470 | ord->CleanUp(); |
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471 | return NULL; |
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472 | } |
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473 | tmpR.names[i] = mstrdup(h); |
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474 | if (hs!=NULL) |
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475 | { |
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476 | hs->CleanUp(); |
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477 | Free((ADDRESS)hs,sizeof(sleftv)); |
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478 | } |
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479 | hs=sl; |
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480 | #ifdef DRING |
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481 | if (sl!=NULL) |
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482 | { |
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483 | #endif |
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484 | sl=sl->next; |
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485 | hs->next=NULL; |
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486 | hs->CleanUp(); |
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487 | if (hs!=rv) Free((ADDRESS)hs,sizeof(sleftv)); |
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488 | #ifdef DRING |
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489 | } |
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490 | if (tmpname!=NULL) |
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491 | { |
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492 | FreeL((ADDRESS)tmpname); |
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493 | tmpname=NULL; |
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494 | } |
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495 | #endif |
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496 | } |
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497 | |
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498 | /* ordering -------------------------------------------------------------*/ |
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499 | sl = ord; |
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500 | /* the number of orderings*/ |
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501 | n = 1; i=0; |
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502 | int o=0; |
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503 | while (sl!=NULL) |
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504 | { |
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505 | intvec *iv = (intvec *)(sl->data); |
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506 | if (((*iv)[1]==ringorder_c)||((*iv)[1]==ringorder_C)) i++; |
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507 | else if ((*iv)[1]!=ringorder_a) o++; |
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508 | n++; |
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509 | sl=sl->next; |
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510 | } |
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511 | if (o==0) |
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512 | { |
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513 | WerrorS("invalid combination of orderings"); |
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514 | ord->CleanUp(); |
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515 | return NULL; |
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516 | } |
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517 | if (i==0) n++; |
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518 | else if (i!=1) |
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519 | WarnS("more than one ordering c/C -- ignored"); |
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520 | |
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521 | /* allocating */ |
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522 | tmpR.order=(int *)Alloc0(n*sizeof(int)); |
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523 | tmpR.block0=(int *)Alloc0(n*sizeof(int)); |
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524 | tmpR.block1=(int *)Alloc0(n*sizeof(int)); |
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525 | tmpR.wvhdl=(short**)Alloc0(n*sizeof(short*)); |
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526 | |
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527 | /* init orders */ |
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528 | sl=ord; |
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529 | n=0; |
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530 | last=0; |
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531 | while (sl!=NULL) |
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532 | { |
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533 | intvec *iv; |
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534 | iv = (intvec *)(sl->data); |
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535 | |
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536 | /* the format of an ordering: |
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537 | * iv[0]: factor |
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538 | * iv[1]: ordering |
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539 | * iv[2..end]: weights |
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540 | */ |
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541 | tmpR.order[n] = (*iv)[1]; |
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542 | switch ((*iv)[1]) |
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543 | { |
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544 | case ringorder_ws: |
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545 | case ringorder_Ws: |
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546 | typ=-1; |
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547 | case ringorder_wp: |
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548 | case ringorder_Wp: |
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549 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
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550 | for (l=2;l<iv->length();l++) |
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551 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
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552 | tmpR.block0[n]=last+1; |
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553 | last+=iv->length()-2; |
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554 | tmpR.block1[n]=last; |
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555 | break; |
---|
556 | case ringorder_ls: |
---|
557 | case ringorder_ds: |
---|
558 | case ringorder_Ds: |
---|
559 | typ=-1; |
---|
560 | case ringorder_lp: |
---|
561 | case ringorder_dp: |
---|
562 | case ringorder_Dp: |
---|
563 | tmpR.block0[n]=last+1; |
---|
564 | //last+=(*iv)[0]; |
---|
565 | if (iv->length()==3) last+=(*iv)[2]; |
---|
566 | else last+=(*iv)[0]; |
---|
567 | tmpR.block1[n]=last; |
---|
568 | if (rCheckIV(iv)) return NULL; |
---|
569 | break; |
---|
570 | case ringorder_c: |
---|
571 | case ringorder_C: |
---|
572 | if (rCheckIV(iv)) return NULL; |
---|
573 | break; |
---|
574 | case ringorder_a: |
---|
575 | tmpR.block0[n]=last+1; |
---|
576 | tmpR.block1[n]=last+iv->length()-2; |
---|
577 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
---|
578 | for (l=2;l<iv->length();l++) |
---|
579 | { |
---|
580 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
---|
581 | if ((*iv)[l]<0) typ=-1; |
---|
582 | } |
---|
583 | break; |
---|
584 | case ringorder_M: |
---|
585 | { |
---|
586 | int Mtyp=rTypeOfMatrixOrder(iv); |
---|
587 | if (Mtyp==0) return NULL; |
---|
588 | if (Mtyp==-1) typ=-1; |
---|
589 | tmpR.wvhdl[n]=(short*)AllocL((iv->length()-1)*sizeof(short)); |
---|
590 | for (l=2;l<iv->length();l++) |
---|
591 | tmpR.wvhdl[n][l-2]=(short)(*iv)[l]; |
---|
592 | tmpR.block0[n]=last+1; |
---|
593 | last+=(int)sqrt((double)(iv->length()-2)); |
---|
594 | tmpR.block1[n]=last; |
---|
595 | break; |
---|
596 | } |
---|
597 | #ifdef TEST |
---|
598 | default: |
---|
599 | Print("order ??? %d\n",(*iv)[1]); |
---|
600 | break; |
---|
601 | #endif |
---|
602 | } |
---|
603 | sl=sl->next; |
---|
604 | n++; |
---|
605 | } |
---|
606 | ord->CleanUp(); |
---|
607 | if (i==0) |
---|
608 | { |
---|
609 | /*there is no c/C-ordering, so append it at the end*/ |
---|
610 | tmpR.order[n]=ringorder_C; |
---|
611 | } |
---|
612 | else n--; |
---|
613 | while ((tmpR.order[n]==ringorder_c) |
---|
614 | ||(tmpR.order[n]==ringorder_C)) |
---|
615 | n--; |
---|
616 | if (tmpR.block1[n]!=tmpR.N) |
---|
617 | { |
---|
618 | if ((tmpR.order[n]==ringorder_dp) || |
---|
619 | (tmpR.order[n]==ringorder_ds) || |
---|
620 | (tmpR.order[n]==ringorder_Dp) || |
---|
621 | (tmpR.order[n]==ringorder_Ds) || |
---|
622 | (tmpR.order[n]==ringorder_lp) || |
---|
623 | (tmpR.order[n]==ringorder_ls)) |
---|
624 | { |
---|
625 | tmpR.block1[n]=tmpR.N; |
---|
626 | if (tmpR.block0[n]>tmpR.N/*tmpR.block1[n]*/) |
---|
627 | { |
---|
628 | tmpR.block1[n]=tmpR.block0[n]; |
---|
629 | goto ord_mismatch; |
---|
630 | //Werror("mismatch of number of vars (%d) and ordering (>=%d vars)", |
---|
631 | // tmpR.N,tmpR.block0[n]); |
---|
632 | //return NULL; |
---|
633 | } |
---|
634 | } |
---|
635 | else |
---|
636 | { |
---|
637 | ord_mismatch: |
---|
638 | Werror("mismatch of number of vars (%d) and ordering (%d vars)", |
---|
639 | tmpR.N,tmpR.block1[n]); |
---|
640 | return NULL; |
---|
641 | } |
---|
642 | } |
---|
643 | } |
---|
644 | tmpR.OrdSgn = typ; |
---|
645 | #ifdef COMP_FAST |
---|
646 | // Complete the initialization |
---|
647 | rComplete(&tmpR); |
---|
648 | #endif |
---|
649 | /* try to enter the ring into the name list*/ |
---|
650 | if ((tmp = enterid(s, myynest, RING_CMD, &idroot))==NULL) |
---|
651 | { |
---|
652 | return NULL; |
---|
653 | } |
---|
654 | |
---|
655 | memcpy(IDRING(tmp),&tmpR,sizeof(tmpR)); |
---|
656 | rSetHdl(tmp,TRUE); |
---|
657 | |
---|
658 | #ifdef RDEBUG |
---|
659 | currRing->no =rNumber; rNumber++; |
---|
660 | #endif |
---|
661 | |
---|
662 | return currRingHdl; |
---|
663 | } |
---|
664 | |
---|
665 | #ifdef COMP_FAST |
---|
666 | // set those fields of the ring, which can be computed from other fields: |
---|
667 | // More particularly, set: |
---|
668 | // r->VarOffset, r->CompIndex |
---|
669 | |
---|
670 | void rComplete(ring r) |
---|
671 | { |
---|
672 | int dummy, VarOffset, CompIndex; |
---|
673 | pGetVarIndicies(r, VarOffset, CompIndex, dummy, dummy); |
---|
674 | r->VarOffset = (short) VarOffset; |
---|
675 | r->CompIndex = (short) CompIndex; |
---|
676 | } |
---|
677 | #endif |
---|
678 | |
---|
679 | /*2 |
---|
680 | * set a new ring from the data: |
---|
681 | s: name, chr: ch, varnames: rv, ordering: ord, typ: typ |
---|
682 | */ |
---|
683 | #ifdef DRING |
---|
684 | void rDSet() |
---|
685 | { |
---|
686 | pDRING=TRUE; |
---|
687 | pSDRING=TRUE; |
---|
688 | pdN=currRing->partN; |
---|
689 | pdK=pVariables-pdN*2-1; |
---|
690 | } |
---|
691 | #endif |
---|
692 | |
---|
693 | int rIsRingVar(char *n) |
---|
694 | { |
---|
695 | if ((currRing!=NULL) && (currRing->names!=NULL)) |
---|
696 | { |
---|
697 | for (int i=0; i<currRing->N; i++) |
---|
698 | { |
---|
699 | if (currRing->names[i]==NULL) return -1; |
---|
700 | if (strcmp(n,currRing->names[i]) == 0) return (int)i; |
---|
701 | } |
---|
702 | } |
---|
703 | return -1; |
---|
704 | } |
---|
705 | |
---|
706 | char* RingVar(short i) |
---|
707 | { |
---|
708 | return currRing->names[i]; |
---|
709 | } |
---|
710 | |
---|
711 | void rWrite(ring r) |
---|
712 | { |
---|
713 | if ((r==NULL)||(r->order==NULL)) |
---|
714 | return; /*to avoid printing after errors....*/ |
---|
715 | |
---|
716 | int nblocks=rBlocks(r); |
---|
717 | |
---|
718 | mmTestP(r,sizeof(ip_sring)); |
---|
719 | mmTestP(r->order,nblocks*sizeof(int)); |
---|
720 | mmTestP(r->block0,nblocks*sizeof(int)); |
---|
721 | mmTestP(r->block1,nblocks*sizeof(int)); |
---|
722 | mmTestP(r->wvhdl,nblocks*sizeof(short *)); |
---|
723 | mmTestP(r->names,r->N*sizeof(char *)); |
---|
724 | |
---|
725 | nblocks--; |
---|
726 | |
---|
727 | |
---|
728 | if ((r->parameter!=NULL)&&(r->ch>1)) |
---|
729 | PrintS("// # ground field : "); |
---|
730 | else |
---|
731 | PrintS("// characteristic : "); |
---|
732 | if (r->ch==-1) Print ("0 (real)\n"); /* R */ |
---|
733 | else if (r->ch<0) Print ("%d\n",-r->ch); /* Fp(a) */ |
---|
734 | else if (r->ch==1) PrintS("0\n"); /* Q(a) */ |
---|
735 | else Print ("%d\n",r->ch); /* Fq, Fp, Q */ |
---|
736 | if (r->parameter!=NULL) |
---|
737 | { |
---|
738 | if (r->ch<2) |
---|
739 | { |
---|
740 | Print ("// %d parameter : ",rPar(r)); |
---|
741 | char **sp=r->parameter; |
---|
742 | int nop=0; |
---|
743 | while (nop<r->P) |
---|
744 | { |
---|
745 | PrintS(*sp); |
---|
746 | PrintS(" "); |
---|
747 | sp++; nop++; |
---|
748 | } |
---|
749 | PrintS("\n// minpoly : "); |
---|
750 | if (r==currRing) |
---|
751 | { |
---|
752 | StringSetS(""); nWrite(r->minpoly); PrintS(StringAppendS("\n")); |
---|
753 | } |
---|
754 | else if (r->minpoly==NULL) |
---|
755 | { |
---|
756 | PrintS("0\n"); |
---|
757 | } |
---|
758 | else |
---|
759 | { |
---|
760 | PrintS("...\n"); |
---|
761 | } |
---|
762 | } |
---|
763 | else |
---|
764 | { |
---|
765 | Print("// primitive element : %s\n", r->parameter[0]); |
---|
766 | if (r==currRing) |
---|
767 | { |
---|
768 | StringSetS("// minpoly : "); |
---|
769 | nfShowMipo();PrintS(StringAppend("\n")); |
---|
770 | } |
---|
771 | } |
---|
772 | } |
---|
773 | Print("// number of vars : %d",r->N); |
---|
774 | |
---|
775 | //for (nblocks=0; r->order[nblocks]; nblocks++); |
---|
776 | nblocks=rBlocks(r)-1; |
---|
777 | |
---|
778 | for (int l=0, nlen=0 ; l<nblocks; l++) |
---|
779 | { |
---|
780 | int i; |
---|
781 | Print("\n// block %3d : ",l+1); |
---|
782 | |
---|
783 | Print("ordering %c", (" acCMldDwWldDwWu")[r->order[l]]); |
---|
784 | if ((r->order[l]>=ringorder_lp)&&(r->order[l]!=ringorder_unspec)) |
---|
785 | { |
---|
786 | if (r->order[l]>=ringorder_ls) |
---|
787 | PrintS("s"); |
---|
788 | else |
---|
789 | PrintS("p"); |
---|
790 | } |
---|
791 | |
---|
792 | if ((r->order[l] != ringorder_c) && (r->order[l] != ringorder_C)) |
---|
793 | { |
---|
794 | PrintS("\n// : names "); |
---|
795 | for (i = r->block0[l]-1; i<r->block1[l]; i++) |
---|
796 | { |
---|
797 | nlen = strlen(r->names[i]); |
---|
798 | Print("%s ",r->names[i]); |
---|
799 | } |
---|
800 | } |
---|
801 | |
---|
802 | if (r->wvhdl[l]!=NULL) |
---|
803 | { |
---|
804 | for (int j= 0; |
---|
805 | j<(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1); |
---|
806 | j+=i) |
---|
807 | { |
---|
808 | PrintS("\n// : weights "); |
---|
809 | for (i = 0; i<=r->block1[l]-r->block0[l]; i++) |
---|
810 | { |
---|
811 | Print("%*d " ,nlen,r->wvhdl[l][i+j],i+j); |
---|
812 | } |
---|
813 | if (r->order[l]!=ringorder_M) break; |
---|
814 | } |
---|
815 | } |
---|
816 | } |
---|
817 | if (r->qideal!=NULL) |
---|
818 | { |
---|
819 | PrintS("\n// quotient ring from ideal"); |
---|
820 | if (r==currRing) |
---|
821 | { |
---|
822 | PrintLn(); |
---|
823 | iiWriteMatrix((matrix)r->qideal,"_",1); |
---|
824 | } |
---|
825 | else PrintS(" ..."); |
---|
826 | } |
---|
827 | } |
---|
828 | |
---|
829 | void rKill(ring r) |
---|
830 | { |
---|
831 | if ((r->ref<=0)&&(r->order!=NULL)) |
---|
832 | { |
---|
833 | #ifdef RDEBUG |
---|
834 | if (traceit &TRACE_SHOW_RINGS) Print("kill ring %d\n",r->no); |
---|
835 | #endif |
---|
836 | if (r==currRing) |
---|
837 | { |
---|
838 | if (r->qideal!=NULL) |
---|
839 | { |
---|
840 | idDelete(&r->qideal); |
---|
841 | r->qideal=NULL; |
---|
842 | currQuotient=NULL; |
---|
843 | } |
---|
844 | if (ppNoether!=NULL) pDelete(&ppNoether); |
---|
845 | if ((sLastPrinted.rtyp>BEGIN_RING) && (sLastPrinted.rtyp<END_RING)) |
---|
846 | { |
---|
847 | sLastPrinted.CleanUp(); |
---|
848 | memset(&sLastPrinted,0,sizeof(sleftv)); |
---|
849 | } |
---|
850 | currRing=NULL; |
---|
851 | currRingHdl=NULL; |
---|
852 | } |
---|
853 | else if (r->qideal!=NULL) |
---|
854 | { |
---|
855 | ring savecurrRing = currRing; |
---|
856 | rChangeCurrRing((ring)r,FALSE); |
---|
857 | idDelete(&r->qideal); |
---|
858 | r->qideal=NULL; |
---|
859 | if (savecurrRing!=NULL) rChangeCurrRing(savecurrRing,FALSE); |
---|
860 | } |
---|
861 | int i=1; |
---|
862 | int j; |
---|
863 | int *pi=r->order; |
---|
864 | for (j=0;j<iiRETURNEXPR_len;j++) |
---|
865 | { |
---|
866 | if (iiLocalRing[j]==r) |
---|
867 | { |
---|
868 | if (j<myynest) Warn("killing the basering for level %d",j); |
---|
869 | iiLocalRing[j]=NULL; |
---|
870 | } |
---|
871 | } |
---|
872 | if (pi!=NULL) |
---|
873 | { |
---|
874 | //while(*pi!=0) { pi++;i++; } |
---|
875 | i=rBlocks(r); |
---|
876 | Free((ADDRESS)r->order,i*sizeof(int)); |
---|
877 | Free((ADDRESS)r->block0,i*sizeof(int)); |
---|
878 | Free((ADDRESS)r->block1,i*sizeof(int)); |
---|
879 | for (j=0; j<i; j++) |
---|
880 | { |
---|
881 | if (r->wvhdl[j]!=NULL) |
---|
882 | FreeL(r->wvhdl[j]); |
---|
883 | } |
---|
884 | Free((ADDRESS)r->wvhdl,i*sizeof(short *)); |
---|
885 | if(r->names!=NULL) |
---|
886 | { |
---|
887 | for (i=0; i<r->N; i++) |
---|
888 | { |
---|
889 | FreeL((ADDRESS)r->names[i]); |
---|
890 | } |
---|
891 | Free((ADDRESS)r->names,r->N*sizeof(char *)); |
---|
892 | } |
---|
893 | if (r->parameter!=NULL) |
---|
894 | { |
---|
895 | int len=0; |
---|
896 | char **s=r->parameter; |
---|
897 | while (len<r->P) |
---|
898 | { |
---|
899 | FreeL((ADDRESS)*s); |
---|
900 | s++; |
---|
901 | len++; |
---|
902 | } |
---|
903 | Free((ADDRESS)r->parameter,r->P*sizeof(char *)); |
---|
904 | } |
---|
905 | } |
---|
906 | #ifdef TEST |
---|
907 | else |
---|
908 | PrintS("internal error: ring structure destroyed\n"); |
---|
909 | memset(r,0,sizeof(ip_sring)); |
---|
910 | #endif |
---|
911 | Free((ADDRESS)r,sizeof(ip_sring)); |
---|
912 | return; |
---|
913 | } |
---|
914 | r->ref--; |
---|
915 | } |
---|
916 | |
---|
917 | void rKill(idhdl h) |
---|
918 | { |
---|
919 | ring r = IDRING(h); |
---|
920 | if (r!=NULL) rKill(r); |
---|
921 | if (h==currRingHdl) |
---|
922 | { |
---|
923 | currRingHdl=idroot; |
---|
924 | while (currRingHdl!=NULL) |
---|
925 | { |
---|
926 | if ((currRingHdl!=h) |
---|
927 | && (IDTYP(currRingHdl)==IDTYP(h)) |
---|
928 | && (h->data.uring==currRingHdl->data.uring)) |
---|
929 | break; |
---|
930 | currRingHdl=IDNEXT(currRingHdl); |
---|
931 | } |
---|
932 | } |
---|
933 | } |
---|
934 | |
---|
935 | idhdl rFindHdl(ring r, idhdl n) |
---|
936 | { |
---|
937 | idhdl h=idroot; |
---|
938 | while (h!=NULL) |
---|
939 | { |
---|
940 | if (((IDTYP(h)==RING_CMD)||(IDTYP(h)==QRING_CMD)) |
---|
941 | && (h->data.uring==r) |
---|
942 | && (h!=n)) |
---|
943 | return h; |
---|
944 | h=IDNEXT(h); |
---|
945 | } |
---|
946 | return NULL; |
---|
947 | } |
---|
948 | |
---|
949 | int rOrderName(char * ordername) |
---|
950 | { |
---|
951 | int order=0; |
---|
952 | |
---|
953 | switch (*ordername) |
---|
954 | { |
---|
955 | case 'l': |
---|
956 | if (*(ordername+1)=='p') order = ringorder_lp; |
---|
957 | else if (*(ordername+1)=='s') order = ringorder_ls; |
---|
958 | break; |
---|
959 | case 'd': |
---|
960 | if (*(ordername+1)=='p') order = ringorder_dp; |
---|
961 | else if (*(ordername+1)=='s') order = ringorder_ds; |
---|
962 | break; |
---|
963 | case 'w': |
---|
964 | if (*(ordername+1)=='p') order = ringorder_wp; |
---|
965 | else if (*(ordername+1)=='s') order = ringorder_ws; |
---|
966 | break; |
---|
967 | case 'D': |
---|
968 | if (*(ordername+1)=='p') order = ringorder_Dp; |
---|
969 | else if (*(ordername+1)=='s') order = ringorder_Ds; |
---|
970 | break; |
---|
971 | case 'W': |
---|
972 | if (*(ordername+1)=='p') order = ringorder_Wp; |
---|
973 | else if (*(ordername+1)=='s') order = ringorder_Ws; |
---|
974 | break; |
---|
975 | case 'c': order = ringorder_c; break; |
---|
976 | case 'C': order = ringorder_C; break; |
---|
977 | case 'a': order = ringorder_a; break; |
---|
978 | case 'M': order = ringorder_M; break; |
---|
979 | default: break; |
---|
980 | } |
---|
981 | if (order==0) Werror("wrong ring order `%s`",ordername); |
---|
982 | FreeL((ADDRESS)ordername); |
---|
983 | return order; |
---|
984 | } |
---|
985 | |
---|
986 | char * rOrdStr(ring r) |
---|
987 | { |
---|
988 | int nblocks,l,i; |
---|
989 | |
---|
990 | for (nblocks=0; r->order[nblocks]; nblocks++); |
---|
991 | nblocks--; |
---|
992 | |
---|
993 | StringSetS(""); |
---|
994 | for (l=0; ; l++) |
---|
995 | { |
---|
996 | StringAppend("%c",(" acCMldDwWldDwW")[r->order[l]]); |
---|
997 | if (r->order[l]>=ringorder_lp) |
---|
998 | { |
---|
999 | if (r->order[l]>=ringorder_ls) |
---|
1000 | StringAppendS("s"); |
---|
1001 | else |
---|
1002 | StringAppendS("p"); |
---|
1003 | } |
---|
1004 | if ((r->order[l] != ringorder_c) && (r->order[l] != ringorder_C)) |
---|
1005 | { |
---|
1006 | if (r->wvhdl[l]!=NULL) |
---|
1007 | { |
---|
1008 | StringAppendS("("); |
---|
1009 | for (int j= 0; |
---|
1010 | j<(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1); |
---|
1011 | j+=i+1) |
---|
1012 | { |
---|
1013 | char c=','; |
---|
1014 | for (i = 0; i<r->block1[l]-r->block0[l]; i++) |
---|
1015 | { |
---|
1016 | StringAppend("%d," ,r->wvhdl[l][i+j]); |
---|
1017 | } |
---|
1018 | if (r->order[l]!=ringorder_M) |
---|
1019 | { |
---|
1020 | StringAppend("%d)" ,r->wvhdl[l][i+j]); |
---|
1021 | break; |
---|
1022 | } |
---|
1023 | if (j+i+1==(r->block1[l]-r->block0[l]+1)*(r->block1[l]-r->block0[l]+1)) |
---|
1024 | c=')'; |
---|
1025 | StringAppend("%d%c" ,r->wvhdl[l][i+j],c); |
---|
1026 | } |
---|
1027 | } |
---|
1028 | else |
---|
1029 | StringAppend("(%d)",r->block1[l]-r->block0[l]+1); |
---|
1030 | } |
---|
1031 | if (l==nblocks) return mstrdup(StringAppendS("")); |
---|
1032 | StringAppendS(","); |
---|
1033 | } |
---|
1034 | } |
---|
1035 | |
---|
1036 | char * rVarStr(ring r) |
---|
1037 | { |
---|
1038 | int i; |
---|
1039 | int l=2; |
---|
1040 | char *s; |
---|
1041 | |
---|
1042 | for (i=0; i<r->N; i++) |
---|
1043 | { |
---|
1044 | l+=strlen(r->names[i])+1; |
---|
1045 | } |
---|
1046 | s=(char *)AllocL(l); |
---|
1047 | s[0]='\0'; |
---|
1048 | for (i=0; i<r->N-1; i++) |
---|
1049 | { |
---|
1050 | strcat(s,r->names[i]); |
---|
1051 | strcat(s,","); |
---|
1052 | } |
---|
1053 | strcat(s,r->names[i]); |
---|
1054 | return s; |
---|
1055 | } |
---|
1056 | |
---|
1057 | char * rCharStr(ring r) |
---|
1058 | { |
---|
1059 | char *s; |
---|
1060 | int i; |
---|
1061 | |
---|
1062 | if (r->parameter==NULL) |
---|
1063 | { |
---|
1064 | i=r->ch; |
---|
1065 | if(i==-1) |
---|
1066 | s=mstrdup("real"); /* R */ |
---|
1067 | else |
---|
1068 | { |
---|
1069 | s=(char *)AllocL(6); |
---|
1070 | sprintf(s,"%d",i); /* Q, Z/p */ |
---|
1071 | } |
---|
1072 | return s; |
---|
1073 | } |
---|
1074 | int l=0; |
---|
1075 | for(i=0; i<r->P;i++) |
---|
1076 | { |
---|
1077 | l+=(strlen(r->parameter[i])+1); |
---|
1078 | } |
---|
1079 | s=(char *)AllocL(l+6); |
---|
1080 | s[0]='\0'; |
---|
1081 | if (r->ch<0) sprintf(s,"%d",-r->ch); /* Fp(a) */ |
---|
1082 | else if (r->ch==1) sprintf(s,"0"); /* Q(a) */ |
---|
1083 | else |
---|
1084 | { |
---|
1085 | sprintf(s,"%d,%s",r->ch,r->parameter[0]); /* Fq */ |
---|
1086 | return s; |
---|
1087 | } |
---|
1088 | char tt[2]; |
---|
1089 | tt[0]=','; |
---|
1090 | tt[1]='\0'; |
---|
1091 | for(i=0; i<r->P;i++) |
---|
1092 | { |
---|
1093 | strcat(s,tt); |
---|
1094 | strcat(s,r->parameter[i]); |
---|
1095 | } |
---|
1096 | return s; |
---|
1097 | } |
---|
1098 | |
---|
1099 | char * rParStr(ring r) |
---|
1100 | { |
---|
1101 | if (r->parameter==NULL) return mstrdup(""); |
---|
1102 | |
---|
1103 | int i; |
---|
1104 | int l=2; |
---|
1105 | |
---|
1106 | for (i=0; i<r->P; i++) |
---|
1107 | { |
---|
1108 | l+=strlen(r->parameter[i])+1; |
---|
1109 | } |
---|
1110 | char *s=(char *)AllocL(l); |
---|
1111 | s[0]='\0'; |
---|
1112 | for (i=0; i<r->P-1; i++) |
---|
1113 | { |
---|
1114 | strcat(s,r->parameter[i]); |
---|
1115 | strcat(s,","); |
---|
1116 | } |
---|
1117 | strcat(s,r->parameter[i]); |
---|
1118 | return s; |
---|
1119 | } |
---|
1120 | |
---|
1121 | char * rString(ring r) |
---|
1122 | { |
---|
1123 | char *ch=rCharStr(r); |
---|
1124 | char *var=rVarStr(r); |
---|
1125 | char *ord=rOrdStr(r); |
---|
1126 | char *res=(char *)AllocL(strlen(ch)+strlen(var)+strlen(ord)+9); |
---|
1127 | sprintf(res,"(%s),(%s),(%s)",ch,var,ord); |
---|
1128 | FreeL((ADDRESS)ch); |
---|
1129 | FreeL((ADDRESS)var); |
---|
1130 | FreeL((ADDRESS)ord); |
---|
1131 | return res; |
---|
1132 | } |
---|
1133 | |
---|
1134 | int rChar(ring r) |
---|
1135 | { |
---|
1136 | if (r->ch==-1) |
---|
1137 | return 0; |
---|
1138 | if (r->parameter==NULL) /* Q, Fp */ |
---|
1139 | return r->ch; |
---|
1140 | if (r->ch<0) /* Fp(a) */ |
---|
1141 | return -r->ch; |
---|
1142 | if (r->ch==1) /* Q(a) */ |
---|
1143 | return 0; |
---|
1144 | /*else*/ /* GF(p,n) */ |
---|
1145 | { |
---|
1146 | if ((r->ch & 1)==0) return 2; |
---|
1147 | int i=3; |
---|
1148 | while ((r->ch % i)!=0) i+=2; |
---|
1149 | return i; |
---|
1150 | } |
---|
1151 | } |
---|
1152 | |
---|
1153 | int rIsExtension(ring r) |
---|
1154 | { |
---|
1155 | if (r->parameter==NULL) /* Q, Fp */ |
---|
1156 | return FALSE; |
---|
1157 | else |
---|
1158 | return TRUE; |
---|
1159 | } |
---|
1160 | |
---|
1161 | int rIsExtension() |
---|
1162 | { |
---|
1163 | return rIsExtension( currRing ); |
---|
1164 | } |
---|
1165 | |
---|
1166 | /*2 |
---|
1167 | *returns -1 for not compatible, (sum is undefined) |
---|
1168 | * 0 for equal, (and sum) |
---|
1169 | * 1 for compatible (and sum) |
---|
1170 | */ |
---|
1171 | int rSum(ring r1, ring r2, ring &sum) |
---|
1172 | { |
---|
1173 | if (r1==r2) |
---|
1174 | { |
---|
1175 | sum=r1; |
---|
1176 | r1->ref++; |
---|
1177 | return 0; |
---|
1178 | } |
---|
1179 | ip_sring tmpR; |
---|
1180 | memset(&tmpR,0,sizeof(tmpR)); |
---|
1181 | /* check coeff. field =====================================================*/ |
---|
1182 | if (r1->ch==r2->ch) |
---|
1183 | { |
---|
1184 | tmpR.ch=r1->ch; |
---|
1185 | if ((r1->ch==0)||(r1->ch>=2)) /* Q, Z/p, GF(p,n) */ |
---|
1186 | { |
---|
1187 | if (r1->parameter!=NULL) |
---|
1188 | { |
---|
1189 | if (strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1190 | { |
---|
1191 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1192 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1193 | tmpR.P=1; |
---|
1194 | } |
---|
1195 | else |
---|
1196 | { |
---|
1197 | WerrorS("GF(p,n)+GF(p,n)"); |
---|
1198 | return -1; |
---|
1199 | } |
---|
1200 | } |
---|
1201 | } |
---|
1202 | else if ((r1->ch==1)||(r1->ch<-1)) /* Q(a),Z/p(a) */ |
---|
1203 | { |
---|
1204 | if (r1->minpoly!=NULL) |
---|
1205 | { |
---|
1206 | if (r2->minpoly!=NULL) |
---|
1207 | { |
---|
1208 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1209 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1210 | && naEqual(r1->minpoly,r2->minpoly)) |
---|
1211 | { |
---|
1212 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1213 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1214 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1215 | tmpR.P=1; |
---|
1216 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1217 | } |
---|
1218 | else |
---|
1219 | { |
---|
1220 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1221 | WerrorS("different minpolys"); |
---|
1222 | return -1; |
---|
1223 | } |
---|
1224 | } |
---|
1225 | else |
---|
1226 | { |
---|
1227 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1228 | && (r2->P==1)) |
---|
1229 | { |
---|
1230 | tmpR.parameter=(char **)Alloc0(sizeof(char *)); |
---|
1231 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1232 | tmpR.P=1; |
---|
1233 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1234 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1235 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1236 | } |
---|
1237 | else |
---|
1238 | { |
---|
1239 | WerrorS("different parameters and minpoly!=0"); |
---|
1240 | return -1; |
---|
1241 | } |
---|
1242 | } |
---|
1243 | } |
---|
1244 | else /* r1->minpoly==NULL */ |
---|
1245 | { |
---|
1246 | if (r2->minpoly!=NULL) |
---|
1247 | { |
---|
1248 | if ((strcmp(r1->parameter[0],r2->parameter[0])==0) /* 1 char */ |
---|
1249 | && (r1->P==1)) |
---|
1250 | { |
---|
1251 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1252 | tmpR.parameter[0]=mstrdup(r1->parameter[0]); |
---|
1253 | tmpR.P=1; |
---|
1254 | nSetChar(r2->ch,TRUE,r2->parameter,r2->P); |
---|
1255 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1256 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1257 | } |
---|
1258 | else |
---|
1259 | { |
---|
1260 | WerrorS("different parameters and minpoly!=0"); |
---|
1261 | return -1; |
---|
1262 | } |
---|
1263 | } |
---|
1264 | else |
---|
1265 | { |
---|
1266 | int len=rPar(r1)+rPar(r2); |
---|
1267 | tmpR.parameter=(char **)Alloc(len*sizeof(char *)); |
---|
1268 | int i; |
---|
1269 | for (i=0;i<r1->P;i++) |
---|
1270 | { |
---|
1271 | tmpR.parameter[i]=mstrdup(r1->parameter[i]); |
---|
1272 | } |
---|
1273 | int j,l; |
---|
1274 | for(j=0;j<r2->P;j++) |
---|
1275 | { |
---|
1276 | for(l=0;l<i;l++) |
---|
1277 | { |
---|
1278 | if(strcmp(tmpR.parameter[l],r2->parameter[j])==0) |
---|
1279 | break; |
---|
1280 | } |
---|
1281 | if (l==i) |
---|
1282 | { |
---|
1283 | tmpR.parameter[i]=mstrdup(r2->parameter[j]); |
---|
1284 | i++; |
---|
1285 | } |
---|
1286 | } |
---|
1287 | if (i!=len) |
---|
1288 | { |
---|
1289 | ReAlloc(tmpR.parameter,len*sizeof(char *),i*sizeof(char *)); |
---|
1290 | } |
---|
1291 | } |
---|
1292 | } |
---|
1293 | } |
---|
1294 | } |
---|
1295 | else /* r1->ch!=r2->ch */ |
---|
1296 | { |
---|
1297 | if (r1->ch<-1) /* Z/p(a) */ |
---|
1298 | { |
---|
1299 | if ((r2->ch==0) /* Q */ |
---|
1300 | || (r2->ch==-r1->ch)) /* Z/p */ |
---|
1301 | { |
---|
1302 | tmpR.ch=r1->ch; |
---|
1303 | tmpR.parameter=(char **)Alloc(rPar(r1)*sizeof(char *)); |
---|
1304 | tmpR.P=r1->P; |
---|
1305 | memcpy(tmpR.parameter,r1->parameter,rPar(r1)*sizeof(char *)); |
---|
1306 | if (r1->minpoly!=NULL) |
---|
1307 | { |
---|
1308 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1309 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1310 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1311 | } |
---|
1312 | } |
---|
1313 | else /* R, Q(a),Z/q,Z/p(a),GF(p,n) */ |
---|
1314 | { |
---|
1315 | WerrorS("Z/p(a)+(R,Q(a),Z/q(a),GF(q,n))"); |
---|
1316 | return -1; |
---|
1317 | } |
---|
1318 | } |
---|
1319 | else if (r1->ch==-1) /* R */ |
---|
1320 | { |
---|
1321 | WerrorS("R+.."); |
---|
1322 | return -1; |
---|
1323 | } |
---|
1324 | else if (r1->ch==0) /* Q */ |
---|
1325 | { |
---|
1326 | if ((r2->ch<-1)||(r2->ch==1)) /* Z/p(a),Q(a) */ |
---|
1327 | { |
---|
1328 | tmpR.ch=r2->ch; |
---|
1329 | tmpR.P=r2->P; |
---|
1330 | tmpR.parameter=(char **)Alloc(rPar(r2)*sizeof(char *)); |
---|
1331 | memcpy(tmpR.parameter,r2->parameter,rPar(r2)*sizeof(char *)); |
---|
1332 | if (r2->minpoly!=NULL) |
---|
1333 | { |
---|
1334 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1335 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1336 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1337 | } |
---|
1338 | } |
---|
1339 | else if (r2->ch>1) /* Z/p,GF(p,n) */ |
---|
1340 | { |
---|
1341 | tmpR.ch=r2->ch; |
---|
1342 | if (r2->parameter!=NULL) |
---|
1343 | { |
---|
1344 | tmpR.parameter=(char **)Alloc(sizeof(char *)); |
---|
1345 | tmpR.P=1; |
---|
1346 | tmpR.parameter[0]=mstrdup(r2->parameter[0]); |
---|
1347 | } |
---|
1348 | } |
---|
1349 | else |
---|
1350 | { |
---|
1351 | WerrorS("Q+R"); |
---|
1352 | return -1; /* R */ |
---|
1353 | } |
---|
1354 | } |
---|
1355 | else if (r1->ch==1) /* Q(a) */ |
---|
1356 | { |
---|
1357 | if (r2->ch==0) /* Q */ |
---|
1358 | { |
---|
1359 | tmpR.ch=r1->ch; |
---|
1360 | tmpR.P=rPar(r1); |
---|
1361 | tmpR.parameter=(char **)Alloc0(rPar(r1)*sizeof(char *)); |
---|
1362 | int i; |
---|
1363 | for(i=0;i<r1->P;i++) |
---|
1364 | { |
---|
1365 | tmpR.parameter[i]=mstrdup(r1->parameter[i]); |
---|
1366 | } |
---|
1367 | if (r1->minpoly!=NULL) |
---|
1368 | { |
---|
1369 | nSetChar(r1->ch,TRUE,r1->parameter,r1->P); |
---|
1370 | tmpR.minpoly=naCopy(r1->minpoly); |
---|
1371 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1372 | } |
---|
1373 | } |
---|
1374 | else /* R, Z/p,GF(p,n) */ |
---|
1375 | { |
---|
1376 | WerrorS("Q(a)+(R,Z/p,GF(p,n))"); |
---|
1377 | return -1; |
---|
1378 | } |
---|
1379 | } |
---|
1380 | else /* r1->ch >=2 , Z/p */ |
---|
1381 | { |
---|
1382 | if (r2->ch==0) /* Q */ |
---|
1383 | { |
---|
1384 | tmpR.ch=r1->ch; |
---|
1385 | } |
---|
1386 | else if (r2->ch==-r1->ch) /* Z/p(a) */ |
---|
1387 | { |
---|
1388 | tmpR.ch=r2->ch; |
---|
1389 | tmpR.P=rPar(r2); |
---|
1390 | tmpR.parameter=(char **)Alloc(rPar(r2)*sizeof(char *)); |
---|
1391 | int i; |
---|
1392 | for(i=0;i<r2->P;i++) |
---|
1393 | { |
---|
1394 | tmpR.parameter[i]=mstrdup(r2->parameter[i]); |
---|
1395 | } |
---|
1396 | if (r2->minpoly!=NULL) |
---|
1397 | { |
---|
1398 | nSetChar(r2->ch,TRUE,r2->parameter,r2->P); |
---|
1399 | tmpR.minpoly=naCopy(r2->minpoly); |
---|
1400 | nSetChar(currRing->ch,TRUE,currRing->parameter,currRing->P); |
---|
1401 | } |
---|
1402 | } |
---|
1403 | else |
---|
1404 | { |
---|
1405 | WerrorS("Z/p+(GF(q,n),Z/q(a),R,Q(a))"); |
---|
1406 | return -1; /* GF(p,n),Z/q(a),R,Q(a) */ |
---|
1407 | } |
---|
1408 | } |
---|
1409 | } |
---|
1410 | /* variable names ========================================================*/ |
---|
1411 | int i,j,k; |
---|
1412 | int l=r1->N+r2->N; |
---|
1413 | char **names=(char **)Alloc0(l*sizeof(char*)); |
---|
1414 | k=0; |
---|
1415 | |
---|
1416 | // collect all varnames from r1, except those which are parameters |
---|
1417 | // of r2, or those which are the empty string |
---|
1418 | for (i=0;i<r1->N;i++) |
---|
1419 | { |
---|
1420 | BOOLEAN b=TRUE; |
---|
1421 | |
---|
1422 | if (*(r1->names[i]) == '\0') |
---|
1423 | b = FALSE; |
---|
1424 | else if ((r2->parameter!=NULL) && (strlen(r1->names[i])==1)) |
---|
1425 | { |
---|
1426 | for(j=0;j<r2->P;j++) |
---|
1427 | { |
---|
1428 | if (strcmp(r1->names[i],r2->parameter[j])==0) |
---|
1429 | { |
---|
1430 | b=FALSE; |
---|
1431 | break; |
---|
1432 | } |
---|
1433 | } |
---|
1434 | } |
---|
1435 | |
---|
1436 | if (b) |
---|
1437 | { |
---|
1438 | //Print("name : %d: %s\n",k,r1->names[i]); |
---|
1439 | names[k]=mstrdup(r1->names[i]); |
---|
1440 | k++; |
---|
1441 | } |
---|
1442 | //else |
---|
1443 | // Print("no name (par1) %s\n",r1->names[i]); |
---|
1444 | } |
---|
1445 | // Add variables from r2, except those which are parameters of r1 |
---|
1446 | // those which are empty strings, and those which equal a var of r1 |
---|
1447 | for(i=0;i<r2->N;i++) |
---|
1448 | { |
---|
1449 | BOOLEAN b=TRUE; |
---|
1450 | |
---|
1451 | if (*(r2->names[i]) == '\0') |
---|
1452 | b = FALSE; |
---|
1453 | else if ((r1->parameter!=NULL) && (strlen(r2->names[i])==1)) |
---|
1454 | { |
---|
1455 | for(j=0;j<r1->P;j++) |
---|
1456 | { |
---|
1457 | if (strcmp(r2->names[i],r1->parameter[j])==0) |
---|
1458 | { |
---|
1459 | b=FALSE; |
---|
1460 | break; |
---|
1461 | } |
---|
1462 | } |
---|
1463 | } |
---|
1464 | |
---|
1465 | if (b) |
---|
1466 | { |
---|
1467 | for(j=0;j<r1->N;j++) |
---|
1468 | { |
---|
1469 | if (strcmp(r1->names[j],r2->names[i])==0) |
---|
1470 | { |
---|
1471 | b=FALSE; |
---|
1472 | break; |
---|
1473 | } |
---|
1474 | } |
---|
1475 | if (b) |
---|
1476 | { |
---|
1477 | names[k]=mstrdup(r2->names[i]); |
---|
1478 | //Print("name : %d : %s\n",k,r2->names[i]); |
---|
1479 | k++; |
---|
1480 | } |
---|
1481 | //else |
---|
1482 | // Print("no name (var): %s\n",r2->names[i]); |
---|
1483 | } |
---|
1484 | //else |
---|
1485 | // Print("no name (par): %s\n",r2->names[i]); |
---|
1486 | } |
---|
1487 | // check whether we found any vars at all |
---|
1488 | if (k == 0) |
---|
1489 | { |
---|
1490 | names[k]=mstrdup(""); |
---|
1491 | k=1; |
---|
1492 | } |
---|
1493 | tmpR.N=k; |
---|
1494 | tmpR.names=names; |
---|
1495 | /* ordering *======================================================== */ |
---|
1496 | tmpR.OrdSgn=1; |
---|
1497 | if ((r1->order[0]==ringorder_unspec) |
---|
1498 | && (r2->order[0]==ringorder_unspec)) |
---|
1499 | { |
---|
1500 | tmpR.order=(int*)Alloc(3*sizeof(int)); |
---|
1501 | tmpR.block0=(int*)Alloc(3*sizeof(int)); |
---|
1502 | tmpR.block1=(int*)Alloc(3*sizeof(int)); |
---|
1503 | tmpR.wvhdl=(short**)Alloc0(3*sizeof(short*)); |
---|
1504 | tmpR.order[0]=ringorder_unspec; |
---|
1505 | tmpR.order[1]=ringorder_C; |
---|
1506 | tmpR.order[2]=0; |
---|
1507 | tmpR.block0[0]=1; |
---|
1508 | tmpR.block1[0]=tmpR.N; |
---|
1509 | } |
---|
1510 | else if (l==k) /* r3=r1+r2 */ |
---|
1511 | { |
---|
1512 | int b; |
---|
1513 | ring rb; |
---|
1514 | if (r1->order[0]==ringorder_unspec) |
---|
1515 | { |
---|
1516 | /* extend order of r2 to r3 */ |
---|
1517 | b=rBlocks(r2); |
---|
1518 | rb=r2; |
---|
1519 | tmpR.OrdSgn=r2->OrdSgn; |
---|
1520 | } |
---|
1521 | else if (r2->order[0]==ringorder_unspec) |
---|
1522 | { |
---|
1523 | /* extend order of r1 to r3 */ |
---|
1524 | b=rBlocks(r1); |
---|
1525 | rb=r1; |
---|
1526 | tmpR.OrdSgn=r1->OrdSgn; |
---|
1527 | } |
---|
1528 | else |
---|
1529 | { |
---|
1530 | b=rBlocks(r1)+rBlocks(r2)-2; /* for only one order C, only one 0 */ |
---|
1531 | rb=NULL; |
---|
1532 | } |
---|
1533 | tmpR.order=(int*)Alloc0(b*sizeof(int)); |
---|
1534 | tmpR.block0=(int*)Alloc0(b*sizeof(int)); |
---|
1535 | tmpR.block1=(int*)Alloc0(b*sizeof(int)); |
---|
1536 | tmpR.wvhdl=(short**)Alloc0(b*sizeof(short*)); |
---|
1537 | /* weights not implemented yet ...*/ |
---|
1538 | if (rb!=NULL) |
---|
1539 | { |
---|
1540 | for (i=0;i<b;i++) |
---|
1541 | { |
---|
1542 | tmpR.order[i]=rb->order[i]; |
---|
1543 | tmpR.block0[i]=rb->block0[i]; |
---|
1544 | tmpR.block1[i]=rb->block1[i]; |
---|
1545 | } |
---|
1546 | tmpR.block0[0]=1; |
---|
1547 | } |
---|
1548 | else /* ring sum for complete rings */ |
---|
1549 | { |
---|
1550 | for (i=0;r1->order[i]!=0;i++) |
---|
1551 | { |
---|
1552 | tmpR.order[i]=r1->order[i]; |
---|
1553 | tmpR.block0[i]=r1->block0[i]; |
---|
1554 | tmpR.block1[i]=r1->block1[i]; |
---|
1555 | } |
---|
1556 | j=i; |
---|
1557 | i--; |
---|
1558 | if ((r1->order[i]==ringorder_c) |
---|
1559 | ||(r1->order[i]==ringorder_C)) |
---|
1560 | { |
---|
1561 | j--; |
---|
1562 | tmpR.order[b-2]=r1->order[i]; |
---|
1563 | } |
---|
1564 | for (i=0;r2->order[i]!=0;i++,j++) |
---|
1565 | { |
---|
1566 | if ((r2->order[i]!=ringorder_c) |
---|
1567 | &&(r2->order[i]!=ringorder_C)) |
---|
1568 | { |
---|
1569 | tmpR.order[j]=r2->order[i]; |
---|
1570 | tmpR.block0[j]=r2->block0[i]+r1->N; |
---|
1571 | tmpR.block1[j]=r2->block1[i]+r1->N; |
---|
1572 | } |
---|
1573 | } |
---|
1574 | if((r1->OrdSgn==-1)||(r2->OrdSgn==-1)) |
---|
1575 | tmpR.OrdSgn=-1; |
---|
1576 | } |
---|
1577 | } |
---|
1578 | else if ((k==r1->N) && (k==r2->N)) /* r1 and r2 are "quite" the same ring */ |
---|
1579 | /* copy r1, because we have the variables from r1 */ |
---|
1580 | { |
---|
1581 | int b=rBlocks(r1); |
---|
1582 | |
---|
1583 | tmpR.order=(int*)Alloc0(b*sizeof(int)); |
---|
1584 | tmpR.block0=(int*)Alloc0(b*sizeof(int)); |
---|
1585 | tmpR.block1=(int*)Alloc0(b*sizeof(int)); |
---|
1586 | tmpR.wvhdl=(short**)Alloc0(b*sizeof(short*)); |
---|
1587 | /* weights not implemented yet ...*/ |
---|
1588 | for (i=0;i<b;i++) |
---|
1589 | { |
---|
1590 | tmpR.order[i]=r1->order[i]; |
---|
1591 | tmpR.block0[i]=r1->block0[i]; |
---|
1592 | tmpR.block1[i]=r1->block1[i]; |
---|
1593 | } |
---|
1594 | tmpR.OrdSgn=r1->OrdSgn; |
---|
1595 | } |
---|
1596 | else |
---|
1597 | { |
---|
1598 | for(i=0;i<k;i++) FreeL((ADDRESS)tmpR.names[i]); |
---|
1599 | Free((ADDRESS)names,tmpR.N*sizeof(char *)); |
---|
1600 | Werror("difficulties with variables: %d,%d -> %d",r1->N,r2->N,k); |
---|
1601 | return -1; |
---|
1602 | } |
---|
1603 | sum=(ring)Alloc(sizeof(ip_sring)); |
---|
1604 | memcpy(sum,&tmpR,sizeof(ip_sring)); |
---|
1605 | #ifdef COMP_FAST |
---|
1606 | rComplete(sum); |
---|
1607 | #endif |
---|
1608 | return 1; |
---|
1609 | } |
---|
1610 | |
---|
1611 | /*2 |
---|
1612 | * create a copy of the ring r, which must be equivalent to currRing |
---|
1613 | * used for qring definition,.. |
---|
1614 | * (i.e.: normal rings: same nCopy as currRing; |
---|
1615 | * qring: same nCopy, same idCopy as currRing) |
---|
1616 | */ |
---|
1617 | ring rCopy(ring r) |
---|
1618 | { |
---|
1619 | int i,j; |
---|
1620 | int *pi; |
---|
1621 | ring res=(ring)Alloc(sizeof(ip_sring)); |
---|
1622 | |
---|
1623 | memcpy4(res,r,sizeof(ip_sring)); |
---|
1624 | if (r->parameter!=NULL) |
---|
1625 | { |
---|
1626 | res->minpoly=nCopy(r->minpoly); |
---|
1627 | int l=rPar(r); |
---|
1628 | res->parameter=(char **)Alloc(l*sizeof(char *)); |
---|
1629 | int i; |
---|
1630 | for(i=0;i<r->P;i++) |
---|
1631 | { |
---|
1632 | res->parameter[i]=mstrdup(r->parameter[i]); |
---|
1633 | } |
---|
1634 | } |
---|
1635 | res->names = (char **)Alloc(r->N * sizeof(char *)); |
---|
1636 | i=1; |
---|
1637 | pi=r->order; |
---|
1638 | while ((*pi)!=0) { i++;pi++; } |
---|
1639 | res->wvhdl = (short **)Alloc(i * sizeof(short *)); |
---|
1640 | res->order = (int *) Alloc(i * sizeof(int)); |
---|
1641 | res->block0 = (int *) Alloc(i * sizeof(int)); |
---|
1642 | res->block1 = (int *) Alloc(i * sizeof(int)); |
---|
1643 | for (j=0; j<i; j++) |
---|
1644 | { |
---|
1645 | if (r->wvhdl[j]!=NULL) |
---|
1646 | { |
---|
1647 | res->wvhdl[j]=(short*)AllocL(mmSizeL((ADDRESS)r->wvhdl[j])); |
---|
1648 | memcpy(res->wvhdl[j],r->wvhdl[j],mmSizeL((ADDRESS)r->wvhdl[j])); |
---|
1649 | } |
---|
1650 | else |
---|
1651 | res->wvhdl[j]=NULL; |
---|
1652 | } |
---|
1653 | memcpy4(res->order,r->order,i * sizeof(int)); |
---|
1654 | memcpy4(res->block0,r->block0,i * sizeof(int)); |
---|
1655 | memcpy4(res->block1,r->block1,i * sizeof(int)); |
---|
1656 | for (i=0; i<res->N; i++) |
---|
1657 | { |
---|
1658 | res->names[i] = mstrdup(r->names[i]); |
---|
1659 | } |
---|
1660 | res->idroot = NULL; |
---|
1661 | if (r->qideal!=NULL) res->qideal= idCopy(r->qideal); |
---|
1662 | #ifdef RDEBUG |
---|
1663 | res->no=rNumber; rNumber++; |
---|
1664 | #endif |
---|
1665 | return res; |
---|
1666 | } |
---|