Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1 | /* Integer object implementation */ |
| 2 | |
| 3 | #include <stdio.h> |
| 4 | |
| 5 | #include "PROTO.h" |
| 6 | #include "object.h" |
| 7 | #include "intobject.h" |
| 8 | #include "stringobject.h" |
| 9 | #include "objimpl.h" |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 10 | #include "errors.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 11 | |
| 12 | /* Standard Booleans */ |
| 13 | intobject FalseObject = { |
| 14 | OB_HEAD_INIT(&Inttype) |
| 15 | 0 |
| 16 | }; |
| 17 | intobject TrueObject = { |
| 18 | OB_HEAD_INIT(&Inttype) |
| 19 | 1 |
| 20 | }; |
| 21 | |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 22 | static object * |
| 23 | err_ovf() |
| 24 | { |
| 25 | err_setstr(RuntimeError, "integer overflow"); |
| 26 | return NULL; |
| 27 | } |
| 28 | |
| 29 | static object * |
| 30 | err_zdiv() |
| 31 | { |
| 32 | err_setstr(RuntimeError, "division by zero"); |
| 33 | return NULL; |
| 34 | } |
| 35 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 36 | object * |
| 37 | newintobject(ival) |
| 38 | long ival; |
| 39 | { |
| 40 | /* For efficiency, this code is copied from newobject() */ |
| 41 | register intobject *op = (intobject *) malloc(sizeof(intobject)); |
| 42 | if (op == NULL) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 43 | err_nomem(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 44 | } |
| 45 | else { |
| 46 | NEWREF(op); |
| 47 | op->ob_type = &Inttype; |
| 48 | op->ob_ival = ival; |
| 49 | } |
| 50 | return (object *) op; |
| 51 | } |
| 52 | |
| 53 | long |
| 54 | getintvalue(op) |
| 55 | register object *op; |
| 56 | { |
| 57 | if (!is_intobject(op)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 58 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 59 | return -1; |
| 60 | } |
| 61 | else |
| 62 | return ((intobject *)op) -> ob_ival; |
| 63 | } |
| 64 | |
| 65 | /* Methods */ |
| 66 | |
| 67 | static void |
| 68 | intprint(v, fp, flags) |
| 69 | intobject *v; |
| 70 | FILE *fp; |
| 71 | int flags; |
| 72 | { |
| 73 | fprintf(fp, "%ld", v->ob_ival); |
| 74 | } |
| 75 | |
| 76 | static object * |
| 77 | intrepr(v) |
| 78 | intobject *v; |
| 79 | { |
| 80 | char buf[20]; |
| 81 | sprintf(buf, "%ld", v->ob_ival); |
| 82 | return newstringobject(buf); |
| 83 | } |
| 84 | |
| 85 | static int |
| 86 | intcompare(v, w) |
| 87 | intobject *v, *w; |
| 88 | { |
| 89 | register long i = v->ob_ival; |
| 90 | register long j = w->ob_ival; |
| 91 | return (i < j) ? -1 : (i > j) ? 1 : 0; |
| 92 | } |
| 93 | |
| 94 | static object * |
| 95 | intadd(v, w) |
| 96 | intobject *v; |
| 97 | register object *w; |
| 98 | { |
| 99 | register long a, b, x; |
| 100 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 101 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 102 | return NULL; |
| 103 | } |
| 104 | a = v->ob_ival; |
| 105 | b = ((intobject *)w) -> ob_ival; |
| 106 | x = a + b; |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 107 | if ((x^a) < 0 && (x^b) < 0) |
| 108 | return err_ovf(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 109 | return newintobject(x); |
| 110 | } |
| 111 | |
| 112 | static object * |
| 113 | intsub(v, w) |
| 114 | intobject *v; |
| 115 | register object *w; |
| 116 | { |
| 117 | register long a, b, x; |
| 118 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 119 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 120 | return NULL; |
| 121 | } |
| 122 | a = v->ob_ival; |
| 123 | b = ((intobject *)w) -> ob_ival; |
| 124 | x = a - b; |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 125 | if ((x^a) < 0 && (x^~b) < 0) |
| 126 | return err_ovf(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 127 | return newintobject(x); |
| 128 | } |
| 129 | |
| 130 | static object * |
| 131 | intmul(v, w) |
| 132 | intobject *v; |
| 133 | register object *w; |
| 134 | { |
| 135 | register long a, b; |
| 136 | double x; |
| 137 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 138 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 139 | return NULL; |
| 140 | } |
| 141 | a = v->ob_ival; |
| 142 | b = ((intobject *)w) -> ob_ival; |
| 143 | x = (double)a * (double)b; |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 144 | if (x > 0x7fffffff || x < (double) (long) 0x80000000) |
| 145 | return err_ovf(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 146 | return newintobject(a * b); |
| 147 | } |
| 148 | |
| 149 | static object * |
| 150 | intdiv(v, w) |
| 151 | intobject *v; |
| 152 | register object *w; |
| 153 | { |
| 154 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 155 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 156 | return NULL; |
| 157 | } |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 158 | if (((intobject *)w) -> ob_ival == 0) |
| 159 | err_zdiv(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 160 | return newintobject(v->ob_ival / ((intobject *)w) -> ob_ival); |
| 161 | } |
| 162 | |
| 163 | static object * |
| 164 | intrem(v, w) |
| 165 | intobject *v; |
| 166 | register object *w; |
| 167 | { |
| 168 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 169 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 170 | return NULL; |
| 171 | } |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 172 | if (((intobject *)w) -> ob_ival == 0) |
| 173 | err_zdiv(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 174 | return newintobject(v->ob_ival % ((intobject *)w) -> ob_ival); |
| 175 | } |
| 176 | |
| 177 | static object * |
| 178 | intpow(v, w) |
| 179 | intobject *v; |
| 180 | register object *w; |
| 181 | { |
| 182 | register long iv, iw, ix; |
| 183 | register int neg; |
| 184 | if (!is_intobject(w)) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 185 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 186 | return NULL; |
| 187 | } |
| 188 | iv = v->ob_ival; |
| 189 | iw = ((intobject *)w)->ob_ival; |
| 190 | neg = 0; |
| 191 | if (iw < 0) |
| 192 | neg = 1, iw = -iw; |
| 193 | ix = 1; |
| 194 | for (; iw > 0; iw--) |
| 195 | ix = ix * iv; |
| 196 | if (neg) { |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 197 | if (ix == 0) |
| 198 | err_zdiv(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 199 | ix = 1/ix; |
| 200 | } |
| 201 | /* XXX How to check for overflow? */ |
| 202 | return newintobject(ix); |
| 203 | } |
| 204 | |
| 205 | static object * |
| 206 | intneg(v) |
| 207 | intobject *v; |
| 208 | { |
| 209 | register long a, x; |
| 210 | a = v->ob_ival; |
| 211 | x = -a; |
Guido van Rossum | 165e67e | 1990-10-14 20:02:26 +0000 | [diff] [blame] | 212 | if (a < 0 && x < 0) |
| 213 | return err_ovf(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 214 | return newintobject(x); |
| 215 | } |
| 216 | |
| 217 | static object * |
| 218 | intpos(v) |
| 219 | intobject *v; |
| 220 | { |
| 221 | INCREF(v); |
| 222 | return (object *)v; |
| 223 | } |
| 224 | |
| 225 | static number_methods int_as_number = { |
| 226 | intadd, /*tp_add*/ |
| 227 | intsub, /*tp_subtract*/ |
| 228 | intmul, /*tp_multiply*/ |
| 229 | intdiv, /*tp_divide*/ |
| 230 | intrem, /*tp_remainder*/ |
| 231 | intpow, /*tp_power*/ |
| 232 | intneg, /*tp_negate*/ |
| 233 | intpos, /*tp_plus*/ |
| 234 | }; |
| 235 | |
| 236 | typeobject Inttype = { |
| 237 | OB_HEAD_INIT(&Typetype) |
| 238 | 0, |
| 239 | "int", |
| 240 | sizeof(intobject), |
| 241 | 0, |
| 242 | free, /*tp_dealloc*/ |
| 243 | intprint, /*tp_print*/ |
| 244 | 0, /*tp_getattr*/ |
| 245 | 0, /*tp_setattr*/ |
| 246 | intcompare, /*tp_compare*/ |
| 247 | intrepr, /*tp_repr*/ |
| 248 | &int_as_number, /*tp_as_number*/ |
| 249 | 0, /*tp_as_sequence*/ |
| 250 | 0, /*tp_as_mapping*/ |
| 251 | }; |