1 /* $NetBSD: smisc.c,v 1.2.14.1 2008/04/08 21:10:55 jdc Exp $ */ 2 3 /**************************************************************** 4 5 The author of this software is David M. Gay. 6 7 Copyright (C) 1998, 1999 by Lucent Technologies 8 All Rights Reserved 9 10 Permission to use, copy, modify, and distribute this software and 11 its documentation for any purpose and without fee is hereby 12 granted, provided that the above copyright notice appear in all 13 copies and that both that the copyright notice and this 14 permission notice and warranty disclaimer appear in supporting 15 documentation, and that the name of Lucent or any of its entities 16 not be used in advertising or publicity pertaining to 17 distribution of the software without specific, written prior 18 permission. 19 20 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 22 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 23 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 24 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 25 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 26 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 27 THIS SOFTWARE. 28 29 ****************************************************************/ 30 31 /* Please send bug reports to David M. Gay (dmg at acm dot org, 32 * with " at " changed at "@" and " dot " changed to "."). */ 33 #include <LibConfig.h> 34 35 #include "gdtoaimp.h" 36 37 #if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */ 38 // Disable: warning C4700: uninitialized local variable 'xx' used 39 #pragma warning ( disable : 4700 ) 40 #endif /* defined(_MSC_VER) */ 41 42 Bigint * 43 s2b 44 #ifdef KR_headers 45 (s, nd0, nd, y9) CONST char *s; int nd0, nd; ULong y9; 46 #else 47 (CONST char *s, int nd0, int nd, ULong y9) 48 #endif 49 { 50 Bigint *b; 51 int i, k; 52 Long x, y; 53 54 x = (nd + 8) / 9; 55 for(k = 0, y = 1; x > y; y <<= 1, k++) ; 56 #ifdef Pack_32 57 b = Balloc(k); 58 if (b == NULL) 59 return NULL; 60 b->x[0] = y9; 61 b->wds = 1; 62 #else 63 b = Balloc(k+1); 64 if (b == NULL) 65 return NULL; 66 b->x[0] = y9 & 0xffff; 67 b->wds = (b->x[1] = y9 >> 16) ? 2 : 1; 68 #endif 69 70 i = 9; 71 if (9 < nd0) { 72 s += 9; 73 do { 74 b = multadd(b, 10, *s++ - '0'); 75 if (b == NULL) 76 return NULL; 77 } while(++i < nd0); 78 s++; 79 } 80 else 81 s += 10; 82 for(; i < nd; i++) { 83 b = multadd(b, 10, *s++ - '0'); 84 if (b == NULL) 85 return NULL; 86 } 87 return b; 88 } 89 90 double 91 ratio 92 #ifdef KR_headers 93 (a, b) Bigint *a, *b; 94 #else 95 (Bigint *a, Bigint *b) 96 #endif 97 { 98 double da, db; 99 int k, ka, kb; 100 101 dval(da) = b2d(a, &ka); 102 dval(db) = b2d(b, &kb); 103 k = ka - kb + ULbits*(a->wds - b->wds); 104 #ifdef IBM 105 if (k > 0) { 106 word0(da) += (k >> 2)*Exp_msk1; 107 if (k &= 3) 108 dval(da) *= 1 << k; 109 } 110 else { 111 k = -k; 112 word0(db) += (k >> 2)*Exp_msk1; 113 if (k &= 3) 114 dval(db) *= 1 << k; 115 } 116 #else 117 if (k > 0) 118 word0(da) += k*Exp_msk1; 119 else { 120 k = -k; 121 word0(db) += k*Exp_msk1; 122 } 123 #endif 124 return dval(da) / dval(db); 125 } 126 127 #ifdef INFNAN_CHECK 128 129 int 130 match 131 #ifdef KR_headers 132 (sp, t) CONST char **sp, *t; 133 #else 134 (CONST char **sp, CONST char *t) 135 #endif 136 { 137 int c, d; 138 CONST char *s = *sp; 139 140 while( (d = *t++) !=0) { 141 if ((c = *++s) >= 'A' && c <= 'Z') 142 c += 'a' - 'A'; 143 if (c != d) 144 return 0; 145 } 146 *sp = s + 1; 147 return 1; 148 } 149 #endif /* INFNAN_CHECK */ 150 151 void 152 #ifdef KR_headers 153 copybits(c, n, b) ULong *c; int n; Bigint *b; 154 #else 155 copybits(ULong *c, int n, Bigint *b) 156 #endif 157 { 158 ULong *ce, *x, *xe; 159 #ifdef Pack_16 160 int nw, nw1; 161 #endif 162 163 ce = c + ((unsigned int)(n-1) >> kshift) + 1; 164 x = b->x; 165 #ifdef Pack_32 166 xe = x + b->wds; 167 while(x < xe) 168 *c++ = *x++; 169 #else 170 nw = b->wds; 171 nw1 = nw & 1; 172 for(xe = x + (nw - nw1); x < xe; x += 2) 173 Storeinc(c, x[1], x[0]); 174 if (nw1) 175 *c++ = *x; 176 #endif 177 while(c < ce) 178 *c++ = 0; 179 } 180 181 ULong 182 #ifdef KR_headers 183 any_on(b, k) Bigint *b; int k; 184 #else 185 any_on(Bigint *b, int k) 186 #endif 187 { 188 int n, nwds; 189 ULong *x, *x0, x1, x2; 190 191 x = b->x; 192 nwds = b->wds; 193 n = (unsigned int)k >> kshift; 194 if (n > nwds) 195 n = nwds; 196 else if (n < nwds && (k &= kmask)) { 197 x1 = x2 = x[n]; 198 x1 >>= k; 199 x1 <<= k; 200 if (x1 != x2) 201 return 1; 202 } 203 x0 = x; 204 x += n; 205 while(x > x0) 206 if (*--x) 207 return 1; 208 return 0; 209 } 210
