| 1 | #ifndef POLYS_COMP_H |
|---|
| 2 | #define POLYS_COMP_H |
|---|
| 3 | /**************************************** |
|---|
| 4 | * Computer Algebra System SINGULAR * |
|---|
| 5 | ****************************************/ |
|---|
| 6 | /* $Id: polys-comp.h,v 1.23 2000-08-18 15:42:06 Singular Exp $ */ |
|---|
| 7 | |
|---|
| 8 | /*************************************************************** |
|---|
| 9 | * |
|---|
| 10 | * File: polys-comp.h |
|---|
| 11 | * Purpose: low-level monomial comparison routines |
|---|
| 12 | * |
|---|
| 13 | ***************************************************************/ |
|---|
| 14 | |
|---|
| 15 | #include "polys-impl.h" |
|---|
| 16 | |
|---|
| 17 | |
|---|
| 18 | #ifndef HAVE_SHIFTED_EXPONENTS |
|---|
| 19 | |
|---|
| 20 | // need to undefine this, since longs might be negative |
|---|
| 21 | #define u_s |
|---|
| 22 | |
|---|
| 23 | #ifdef WORDS_BIGENDIAN |
|---|
| 24 | |
|---|
| 25 | #define _memcmp(p1, p2, i, l, actionE, actionD) \ |
|---|
| 26 | do \ |
|---|
| 27 | { \ |
|---|
| 28 | i = 0; \ |
|---|
| 29 | while (i < l) \ |
|---|
| 30 | { \ |
|---|
| 31 | if (p1[i] != p2[i]) actionD; \ |
|---|
| 32 | i++; \ |
|---|
| 33 | } \ |
|---|
| 34 | actionE; \ |
|---|
| 35 | } \ |
|---|
| 36 | while (0) |
|---|
| 37 | |
|---|
| 38 | #define _prMonCmp(p1, p2, r, actionE, actionG, actionS) \ |
|---|
| 39 | do \ |
|---|
| 40 | { \ |
|---|
| 41 | register const u_s long* s1 = &(p1->exp.l[r->pCompLowIndex]); \ |
|---|
| 42 | register const u_s long* s2 = &(p2->exp.l[r->pCompLowIndex]); \ |
|---|
| 43 | int _l = r->pCompLSize; \ |
|---|
| 44 | register int _i; \ |
|---|
| 45 | _memcmp(s1, s2, _i, _l, actionE, goto _NotEqual); \ |
|---|
| 46 | \ |
|---|
| 47 | _NotEqual: \ |
|---|
| 48 | if (r->ordsgn[_i] != 1) \ |
|---|
| 49 | { \ |
|---|
| 50 | if (s2[_i] > s1[_i]) actionG; \ |
|---|
| 51 | actionS; \ |
|---|
| 52 | } \ |
|---|
| 53 | if (s1[_i] > s2[_i]) actionG; \ |
|---|
| 54 | actionS; \ |
|---|
| 55 | } \ |
|---|
| 56 | while (0) |
|---|
| 57 | |
|---|
| 58 | #else // ! WORDS_BIGENDIAN |
|---|
| 59 | |
|---|
| 60 | #define _memcmp(p1, p2, i, actionE, actionD) \ |
|---|
| 61 | do \ |
|---|
| 62 | { \ |
|---|
| 63 | for (;;) \ |
|---|
| 64 | { \ |
|---|
| 65 | if (p1[i] != p2[i]) actionD; \ |
|---|
| 66 | if (i == 0) actionE; \ |
|---|
| 67 | i--; \ |
|---|
| 68 | } \ |
|---|
| 69 | } \ |
|---|
| 70 | while (0) |
|---|
| 71 | |
|---|
| 72 | #define register |
|---|
| 73 | |
|---|
| 74 | #define _prMonCmp(p1, p2, r, actionE, actionG, actionS) \ |
|---|
| 75 | do \ |
|---|
| 76 | { \ |
|---|
| 77 | register const u_s long* __s1 = \ |
|---|
| 78 | (const long *)&(p1->exp.l[r->pCompLowIndex]); \ |
|---|
| 79 | register const u_s long* __s2 = \ |
|---|
| 80 | (const long *)&(p2->exp.l[r->pCompLowIndex]); \ |
|---|
| 81 | register int __i = r->pCompLSize - 1; \ |
|---|
| 82 | _memcmp(__s1, __s2, __i, actionE, goto _NotEqual); \ |
|---|
| 83 | \ |
|---|
| 84 | _NotEqual: \ |
|---|
| 85 | if (r->ordsgn[__i] != 1) \ |
|---|
| 86 | { \ |
|---|
| 87 | if (__s2[__i] > __s1[__i]) actionG; \ |
|---|
| 88 | actionS; \ |
|---|
| 89 | } \ |
|---|
| 90 | if (__s1[__i] > __s2[__i]) actionG; \ |
|---|
| 91 | actionS; \ |
|---|
| 92 | } \ |
|---|
| 93 | while (0) |
|---|
| 94 | |
|---|
| 95 | |
|---|
| 96 | #endif // WORDS_BIGENDIAN |
|---|
| 97 | #else // ndef HAVE_SHIFTED_EXPONENTS |
|---|
| 98 | |
|---|
| 99 | // copied from BIGENDIAN case, with modification: pCompLowIndex=0 |
|---|
| 100 | |
|---|
| 101 | // need to undefine this, since longs might be negative |
|---|
| 102 | #define u_s |
|---|
| 103 | |
|---|
| 104 | #define _memcmp(p1, p2, i, l, actionE, actionD) \ |
|---|
| 105 | do \ |
|---|
| 106 | { \ |
|---|
| 107 | i = 0; \ |
|---|
| 108 | while (i < l) \ |
|---|
| 109 | { \ |
|---|
| 110 | if (p1[i] != p2[i]) actionD; \ |
|---|
| 111 | i++; \ |
|---|
| 112 | } \ |
|---|
| 113 | actionE; \ |
|---|
| 114 | } \ |
|---|
| 115 | while (0) |
|---|
| 116 | |
|---|
| 117 | #define _prMonCmp(p1, p2, r, actionE, actionG, actionS) \ |
|---|
| 118 | do \ |
|---|
| 119 | { \ |
|---|
| 120 | register const u_s long* s1 = &(p1->exp.l[0]); \ |
|---|
| 121 | register const u_s long* s2 = &(p2->exp.l[0]); \ |
|---|
| 122 | int _l = r->pCompLSize; \ |
|---|
| 123 | register int _i; \ |
|---|
| 124 | _memcmp(s1, s2, _i, _l, actionE, goto _NotEqual); \ |
|---|
| 125 | \ |
|---|
| 126 | _NotEqual: \ |
|---|
| 127 | if (r->ordsgn[_i] != 1) \ |
|---|
| 128 | { \ |
|---|
| 129 | if (s2[_i] > s1[_i]) actionG; \ |
|---|
| 130 | actionS; \ |
|---|
| 131 | } \ |
|---|
| 132 | if (s1[_i] > s2[_i]) actionG; \ |
|---|
| 133 | actionS; \ |
|---|
| 134 | } \ |
|---|
| 135 | while (0) |
|---|
| 136 | |
|---|
| 137 | #endif |
|---|
| 138 | |
|---|
| 139 | #if defined(PDEBUG) && defined(HAVE_SHIFTED_EXPONENTS) |
|---|
| 140 | extern int pDBsyzComp; |
|---|
| 141 | int rComp0(poly p1, poly p2); |
|---|
| 142 | #else |
|---|
| 143 | inline int rComp0(poly p1, poly p2) |
|---|
| 144 | { |
|---|
| 145 | _prMonCmp(p1, p2, currRing, return 0, return 1, return -1); |
|---|
| 146 | } |
|---|
| 147 | #endif |
|---|
| 148 | |
|---|
| 149 | inline int prComp0(poly p1, poly p2, ring r) |
|---|
| 150 | { |
|---|
| 151 | _prMonCmp(p1, p2, r, return 0, return 1, return -1); |
|---|
| 152 | } |
|---|
| 153 | |
|---|
| 154 | #endif // POLYS_COMP_H |
|---|
| 155 | |
|---|
