[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[341696] | 4 | /* $Id$ */ |
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[35aab3] | 5 | |
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| 6 | /* |
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| 7 | * ABSTRACT - all basic methods to convert polynomials to strings |
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| 8 | */ |
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| 9 | |
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| 10 | /* includes */ |
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[599326] | 11 | #include <kernel/mod2.h> |
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| 12 | #include <kernel/structs.h> |
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| 13 | #include <kernel/numbers.h> |
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| 14 | #include <kernel/ring.h> |
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| 15 | #include <kernel/p_polys.h> |
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| 16 | #include <kernel/febase.h> |
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[35aab3] | 17 | |
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| 18 | /*2 |
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| 19 | * writes a monomial (p), |
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| 20 | * uses form x*gen(.) if ko != coloumn number of p |
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| 21 | */ |
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| 22 | static void writemon(poly p, int ko, ring r) |
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| 23 | { |
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| 24 | BOOLEAN wroteCoef=FALSE,writeGen=FALSE; |
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| 25 | |
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| 26 | if (pGetCoeff(p)!=NULL) |
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| 27 | n_Normalize(pGetCoeff(p),r); |
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| 28 | |
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| 29 | if (((p_GetComp(p,r) == (short)ko) |
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| 30 | &&(p_LmIsConstantComp(p, r))) |
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| 31 | || ((!n_IsOne(pGetCoeff(p),r)) |
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| 32 | && (!n_IsMOne(pGetCoeff(p),r)) |
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| 33 | ) |
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| 34 | ) |
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| 35 | { |
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| 36 | n_Write(p->coef,r); |
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[456edca] | 37 | wroteCoef=(rShortOut(r) == FALSE) |
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| 38 | || (r->parameter!=NULL) |
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| 39 | || rField_is_R(r) || (rField_is_long_R(r)) || (rField_is_long_C(r)); |
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[35aab3] | 40 | writeGen=TRUE; |
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| 41 | } |
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| 42 | else if (n_IsMOne(pGetCoeff(p),r)) |
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| 43 | { |
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| 44 | if (n_GreaterZero(pGetCoeff(p),r)) |
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| 45 | { |
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| 46 | n_Write(p->coef,r); |
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[456edca] | 47 | wroteCoef=(rShortOut(r) == FALSE) |
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| 48 | || (r->parameter!=NULL) |
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| 49 | || rField_is_R(r) || (rField_is_long_R(r)) || (rField_is_long_C(r)); |
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[35aab3] | 50 | writeGen=TRUE; |
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| 51 | } |
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| 52 | else |
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| 53 | StringAppendS("-"); |
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| 54 | } |
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| 55 | |
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| 56 | int i; |
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| 57 | for (i=0; i<r->N; i++) |
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| 58 | { |
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| 59 | { |
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[27667b] | 60 | long ee = p_GetExp(p,i+1,r); |
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| 61 | if (ee!=0L) |
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[35aab3] | 62 | { |
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| 63 | if (wroteCoef) |
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| 64 | StringAppendS("*"); |
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| 65 | //else |
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| 66 | wroteCoef=(rShortOut(r) == FALSE); |
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| 67 | writeGen=TRUE; |
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| 68 | StringAppendS(rRingVar(i, r)); |
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[27667b] | 69 | if (ee != 1L) |
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[35aab3] | 70 | { |
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| 71 | if (rShortOut(r)==0) StringAppendS("^"); |
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[27667b] | 72 | StringAppend("%ld", ee); |
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[35aab3] | 73 | } |
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| 74 | } |
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| 75 | } |
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| 76 | } |
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| 77 | //StringAppend("{%d}",p->Order); |
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[0b5e3d] | 78 | if (p_GetComp(p, r) != (long)ko) |
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[35aab3] | 79 | { |
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| 80 | if (writeGen) StringAppendS("*"); |
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| 81 | StringAppend("gen(%d)", p_GetComp(p, r)); |
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| 82 | } |
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| 83 | } |
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| 84 | |
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| 85 | char* p_String0(poly p, ring lmRing, ring tailRing) |
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| 86 | { |
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| 87 | if (p == NULL) |
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| 88 | { |
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| 89 | return StringAppendS("0"); |
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| 90 | } |
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| 91 | if ((p_GetComp(p, lmRing) == 0) || (!lmRing->VectorOut)) |
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| 92 | { |
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| 93 | writemon(p,0, lmRing); |
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| 94 | p = pNext(p); |
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| 95 | while (p!=NULL) |
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| 96 | { |
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| 97 | if ((p->coef==NULL)||n_GreaterZero(p->coef,tailRing)) |
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| 98 | StringAppendS("+"); |
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| 99 | writemon(p,0, tailRing); |
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| 100 | p = pNext(p); |
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| 101 | } |
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| 102 | return StringAppendS(""); |
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| 103 | } |
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| 104 | |
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[0b5e3d] | 105 | long k = 1; |
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[35aab3] | 106 | StringAppendS("["); |
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| 107 | loop |
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| 108 | { |
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| 109 | while (k < p_GetComp(p,lmRing)) |
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| 110 | { |
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| 111 | StringAppendS("0,"); |
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| 112 | k++; |
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| 113 | } |
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| 114 | writemon(p,k,lmRing); |
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| 115 | pIter(p); |
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| 116 | while ((p!=NULL) && (k == p_GetComp(p, tailRing))) |
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| 117 | { |
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| 118 | if (n_GreaterZero(p->coef,tailRing)) StringAppendS("+"); |
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| 119 | writemon(p,k,tailRing); |
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| 120 | pIter(p); |
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| 121 | } |
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| 122 | if (p == NULL) break; |
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| 123 | StringAppendS(","); |
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| 124 | k++; |
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| 125 | } |
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| 126 | return StringAppendS("]"); |
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| 127 | } |
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| 128 | |
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| 129 | char* p_String(poly p, ring lmRing, ring tailRing) |
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| 130 | { |
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| 131 | StringSetS(""); |
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| 132 | return p_String0(p, lmRing, tailRing); |
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| 133 | } |
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| 134 | |
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| 135 | /*2 |
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| 136 | * writes a polynomial p to stdout |
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| 137 | */ |
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| 138 | void p_Write0(poly p, ring lmRing, ring tailRing) |
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| 139 | { |
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| 140 | PrintS(p_String(p, lmRing, tailRing)); |
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| 141 | } |
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| 142 | |
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| 143 | /*2 |
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| 144 | * writes a polynomial p to stdout followed by \n |
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| 145 | */ |
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| 146 | void p_Write(poly p, ring lmRing, ring tailRing) |
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| 147 | { |
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| 148 | p_Write0(p, lmRing, tailRing); |
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| 149 | PrintLn(); |
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| 150 | } |
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| 151 | |
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[715f30] | 152 | #if !defined(__OPTIMIZE__) || defined(KDEBUG) |
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[35aab3] | 153 | /*2 |
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| 154 | *the standard debugging output: |
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| 155 | *print the first two monomials of the poly (wrp) or only the lead term (wrp0), |
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| 156 | *possibly followed by the string "+..." |
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| 157 | */ |
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| 158 | void p_wrp0(poly p, ring ri) |
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| 159 | { |
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| 160 | poly r; |
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| 161 | |
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| 162 | if (p==NULL) PrintS("NULL"); |
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| 163 | else if (pNext(p)==NULL) p_Write0(p, ri); |
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| 164 | else |
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| 165 | { |
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| 166 | r = pNext(p); |
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| 167 | pNext(p) = NULL; |
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| 168 | p_Write0(p, ri); |
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| 169 | if (r!=NULL) |
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| 170 | { |
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| 171 | PrintS("+..."); |
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| 172 | pNext(p) = r; |
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| 173 | } |
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| 174 | } |
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| 175 | } |
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[715f30] | 176 | #endif |
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[35aab3] | 177 | void p_wrp(poly p, ring lmRing, ring tailRing) |
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| 178 | { |
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| 179 | poly r; |
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| 180 | |
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| 181 | if (p==NULL) PrintS("NULL"); |
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| 182 | else if (pNext(p)==NULL) p_Write0(p, lmRing); |
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| 183 | else |
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| 184 | { |
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| 185 | r = pNext(pNext(p)); |
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| 186 | pNext(pNext(p)) = NULL; |
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| 187 | p_Write0(p, lmRing, tailRing); |
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| 188 | if (r!=NULL) |
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| 189 | { |
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| 190 | PrintS("+..."); |
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| 191 | pNext(pNext(p)) = r; |
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| 192 | } |
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| 193 | } |
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| 194 | } |
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