Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 6610ad9 | 1995-01-04 19:07:38 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame^] | 7 | Copyright (c) 2000, BeOpen.com. |
| 8 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 9 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 10 | All rights reserved. |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 11 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame^] | 12 | See the file "Misc/COPYRIGHT" for information on usage and |
| 13 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 14 | |
| 15 | ******************************************************************/ |
| 16 | |
| 17 | /* Long (arbitrary precision) integer object implementation */ |
| 18 | |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 19 | /* XXX The functional organization of this file is terrible */ |
| 20 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 21 | #include "Python.h" |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 22 | #include "longintrepr.h" |
Guido van Rossum | 687ec18 | 1995-03-04 22:43:47 +0000 | [diff] [blame] | 23 | #include "mymath.h" |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 24 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 25 | #include <assert.h> |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 26 | #include <ctype.h> |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 27 | |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 28 | #define ABS(x) ((x) < 0 ? -(x) : (x)) |
| 29 | |
| 30 | /* Forward */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 31 | static PyLongObject *long_normalize Py_PROTO((PyLongObject *)); |
| 32 | static PyLongObject *mul1 Py_PROTO((PyLongObject *, wdigit)); |
| 33 | static PyLongObject *muladd1 Py_PROTO((PyLongObject *, wdigit, wdigit)); |
| 34 | static PyLongObject *divrem1 Py_PROTO((PyLongObject *, wdigit, digit *)); |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 35 | static PyObject *long_format Py_PROTO((PyObject *aa, int base, int addL)); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 36 | |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 37 | static int ticker; /* XXX Could be shared with ceval? */ |
| 38 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 39 | #define SIGCHECK(PyTryBlock) \ |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 40 | if (--ticker < 0) { \ |
| 41 | ticker = 100; \ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 42 | if (PyErr_CheckSignals()) { PyTryBlock; } \ |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 43 | } |
| 44 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 45 | /* Normalize (remove leading zeros from) a long int object. |
| 46 | Doesn't attempt to free the storage--in most cases, due to the nature |
| 47 | of the algorithms used, this could save at most be one word anyway. */ |
| 48 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 49 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 50 | long_normalize(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 51 | register PyLongObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 52 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 53 | int j = ABS(v->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 54 | register int i = j; |
| 55 | |
| 56 | while (i > 0 && v->ob_digit[i-1] == 0) |
| 57 | --i; |
| 58 | if (i != j) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 59 | v->ob_size = (v->ob_size < 0) ? -(i) : i; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 60 | return v; |
| 61 | } |
| 62 | |
| 63 | /* Allocate a new long int object with size digits. |
| 64 | Return NULL and set exception if we run out of memory. */ |
| 65 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 66 | PyLongObject * |
| 67 | _PyLong_New(size) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 68 | int size; |
| 69 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 70 | return PyObject_NEW_VAR(PyLongObject, &PyLong_Type, size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | /* Create a new long int object from a C long int */ |
| 74 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 75 | PyObject * |
| 76 | PyLong_FromLong(ival) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 77 | long ival; |
| 78 | { |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 79 | /* Assume a C long fits in at most 5 'digits' */ |
| 80 | /* Works on both 32- and 64-bit machines */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 81 | PyLongObject *v = _PyLong_New(5); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 82 | if (v != NULL) { |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 83 | unsigned long t = ival; |
| 84 | int i; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 85 | if (ival < 0) { |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 86 | t = -ival; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 87 | v->ob_size = -(v->ob_size); |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 88 | } |
| 89 | for (i = 0; i < 5; i++) { |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 90 | v->ob_digit[i] = (digit) (t & MASK); |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 91 | t >>= SHIFT; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 92 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 93 | v = long_normalize(v); |
| 94 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 95 | return (PyObject *)v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 96 | } |
| 97 | |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 98 | /* Create a new long int object from a C unsigned long int */ |
| 99 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 100 | PyObject * |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 101 | PyLong_FromUnsignedLong(ival) |
| 102 | unsigned long ival; |
| 103 | { |
| 104 | /* Assume a C long fits in at most 5 'digits' */ |
| 105 | /* Works on both 32- and 64-bit machines */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 106 | PyLongObject *v = _PyLong_New(5); |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 107 | if (v != NULL) { |
| 108 | unsigned long t = ival; |
| 109 | int i; |
| 110 | for (i = 0; i < 5; i++) { |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 111 | v->ob_digit[i] = (digit) (t & MASK); |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 112 | t >>= SHIFT; |
| 113 | } |
| 114 | v = long_normalize(v); |
| 115 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 116 | return (PyObject *)v; |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 117 | } |
| 118 | |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 119 | /* Create a new long int object from a C double */ |
| 120 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 121 | PyObject * |
Guido van Rossum | 687ec18 | 1995-03-04 22:43:47 +0000 | [diff] [blame] | 122 | #ifdef MPW |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 123 | PyLong_FromDouble(double dval) |
Guido van Rossum | 687ec18 | 1995-03-04 22:43:47 +0000 | [diff] [blame] | 124 | #else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 125 | PyLong_FromDouble(dval) |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 126 | double dval; |
Guido van Rossum | 687ec18 | 1995-03-04 22:43:47 +0000 | [diff] [blame] | 127 | #endif /* MPW */ |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 128 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 129 | PyLongObject *v; |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 130 | double frac; |
| 131 | int i, ndig, expo, neg; |
| 132 | neg = 0; |
Guido van Rossum | 1a23c24 | 1999-09-27 17:11:52 +0000 | [diff] [blame] | 133 | if (dval && dval * 0.5 == dval) { |
| 134 | PyErr_SetString(PyExc_OverflowError, |
| 135 | "cannot convert float infinity to long"); |
| 136 | return NULL; |
| 137 | } |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 138 | if (dval < 0.0) { |
| 139 | neg = 1; |
| 140 | dval = -dval; |
| 141 | } |
| 142 | frac = frexp(dval, &expo); /* dval = frac*2**expo; 0.0 <= frac < 1.0 */ |
| 143 | if (expo <= 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 144 | return PyLong_FromLong(0L); |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 145 | ndig = (expo-1) / SHIFT + 1; /* Number of 'digits' in result */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 146 | v = _PyLong_New(ndig); |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 147 | if (v == NULL) |
| 148 | return NULL; |
| 149 | frac = ldexp(frac, (expo-1) % SHIFT + 1); |
| 150 | for (i = ndig; --i >= 0; ) { |
| 151 | long bits = (long)frac; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 152 | v->ob_digit[i] = (digit) bits; |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 153 | frac = frac - (double)bits; |
| 154 | frac = ldexp(frac, SHIFT); |
| 155 | } |
| 156 | if (neg) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 157 | v->ob_size = -(v->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 158 | return (PyObject *)v; |
Guido van Rossum | 149e9ea | 1991-06-03 10:58:24 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 161 | /* Get a C long int from a long int object. |
| 162 | Returns -1 and sets an error condition if overflow occurs. */ |
| 163 | |
| 164 | long |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 165 | PyLong_AsLong(vv) |
| 166 | PyObject *vv; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 167 | { |
Guido van Rossum | f753181 | 1998-05-26 14:33:37 +0000 | [diff] [blame] | 168 | /* This version by Tim Peters */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 169 | register PyLongObject *v; |
Guido van Rossum | f753181 | 1998-05-26 14:33:37 +0000 | [diff] [blame] | 170 | unsigned long x, prev; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 171 | int i, sign; |
Guido van Rossum | f753181 | 1998-05-26 14:33:37 +0000 | [diff] [blame] | 172 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 173 | if (vv == NULL || !PyLong_Check(vv)) { |
| 174 | PyErr_BadInternalCall(); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 175 | return -1; |
| 176 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 177 | v = (PyLongObject *)vv; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 178 | i = v->ob_size; |
| 179 | sign = 1; |
| 180 | x = 0; |
| 181 | if (i < 0) { |
| 182 | sign = -1; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 183 | i = -(i); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 184 | } |
| 185 | while (--i >= 0) { |
| 186 | prev = x; |
| 187 | x = (x << SHIFT) + v->ob_digit[i]; |
Guido van Rossum | f753181 | 1998-05-26 14:33:37 +0000 | [diff] [blame] | 188 | if ((x >> SHIFT) != prev) |
| 189 | goto overflow; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 190 | } |
Guido van Rossum | f753181 | 1998-05-26 14:33:37 +0000 | [diff] [blame] | 191 | /* Haven't lost any bits, but if the sign bit is set we're in |
| 192 | * trouble *unless* this is the min negative number. So, |
| 193 | * trouble iff sign bit set && (positive || some bit set other |
| 194 | * than the sign bit). |
| 195 | */ |
| 196 | if ((long)x < 0 && (sign > 0 || (x << 1) != 0)) |
| 197 | goto overflow; |
| 198 | return (long)x * sign; |
| 199 | |
| 200 | overflow: |
| 201 | PyErr_SetString(PyExc_OverflowError, |
| 202 | "long int too long to convert"); |
| 203 | return -1; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 204 | } |
| 205 | |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 206 | /* Get a C long int from a long int object. |
| 207 | Returns -1 and sets an error condition if overflow occurs. */ |
| 208 | |
| 209 | unsigned long |
| 210 | PyLong_AsUnsignedLong(vv) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 211 | PyObject *vv; |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 212 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 213 | register PyLongObject *v; |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 214 | unsigned long x, prev; |
| 215 | int i; |
| 216 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 217 | if (vv == NULL || !PyLong_Check(vv)) { |
| 218 | PyErr_BadInternalCall(); |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 219 | return (unsigned long) -1; |
| 220 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 221 | v = (PyLongObject *)vv; |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 222 | i = v->ob_size; |
| 223 | x = 0; |
| 224 | if (i < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 225 | PyErr_SetString(PyExc_OverflowError, |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 226 | "can't convert negative value to unsigned long"); |
| 227 | return (unsigned long) -1; |
| 228 | } |
| 229 | while (--i >= 0) { |
| 230 | prev = x; |
| 231 | x = (x << SHIFT) + v->ob_digit[i]; |
| 232 | if ((x >> SHIFT) != prev) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 233 | PyErr_SetString(PyExc_OverflowError, |
Guido van Rossum | 53756b1 | 1997-01-03 17:14:46 +0000 | [diff] [blame] | 234 | "long int too long to convert"); |
| 235 | return (unsigned long) -1; |
| 236 | } |
| 237 | } |
| 238 | return x; |
| 239 | } |
| 240 | |
Guido van Rossum | 09e6ad0 | 1997-02-14 22:54:21 +0000 | [diff] [blame] | 241 | /* Get a C double from a long int object. */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 242 | |
| 243 | double |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 244 | PyLong_AsDouble(vv) |
| 245 | PyObject *vv; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 246 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 247 | register PyLongObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 248 | double x; |
| 249 | double multiplier = (double) (1L << SHIFT); |
| 250 | int i, sign; |
| 251 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 252 | if (vv == NULL || !PyLong_Check(vv)) { |
| 253 | PyErr_BadInternalCall(); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 254 | return -1; |
| 255 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 256 | v = (PyLongObject *)vv; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 257 | i = v->ob_size; |
| 258 | sign = 1; |
| 259 | x = 0.0; |
| 260 | if (i < 0) { |
| 261 | sign = -1; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 262 | i = -(i); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 263 | } |
| 264 | while (--i >= 0) { |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 265 | x = x*multiplier + (double)v->ob_digit[i]; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 266 | } |
| 267 | return x * sign; |
| 268 | } |
| 269 | |
Guido van Rossum | 78694d9 | 1998-09-18 14:14:13 +0000 | [diff] [blame] | 270 | /* Create a new long (or int) object from a C pointer */ |
| 271 | |
| 272 | PyObject * |
| 273 | PyLong_FromVoidPtr(p) |
| 274 | void *p; |
| 275 | { |
| 276 | #if SIZEOF_VOID_P == SIZEOF_LONG |
| 277 | return PyInt_FromLong((long)p); |
| 278 | #else |
| 279 | /* optimize null pointers */ |
| 280 | if ( p == NULL ) |
| 281 | return PyInt_FromLong(0); |
| 282 | |
| 283 | /* we can assume that HAVE_LONG_LONG is true. if not, then the |
| 284 | configuration process should have bailed (having big pointers |
| 285 | without long longs seems non-sensical) */ |
| 286 | return PyLong_FromLongLong((LONG_LONG)p); |
| 287 | #endif /* SIZEOF_VOID_P == SIZEOF_LONG */ |
| 288 | } |
| 289 | |
| 290 | /* Get a C pointer from a long object (or an int object in some cases) */ |
| 291 | |
| 292 | void * |
| 293 | PyLong_AsVoidPtr(vv) |
| 294 | PyObject *vv; |
| 295 | { |
| 296 | /* This function will allow int or long objects. If vv is neither, |
| 297 | then the PyLong_AsLong*() functions will raise the exception: |
| 298 | PyExc_SystemError, "bad argument to internal function" |
| 299 | */ |
| 300 | |
| 301 | #if SIZEOF_VOID_P == SIZEOF_LONG |
| 302 | long x; |
| 303 | |
| 304 | if ( PyInt_Check(vv) ) |
| 305 | x = PyInt_AS_LONG(vv); |
| 306 | else |
| 307 | x = PyLong_AsLong(vv); |
| 308 | #else |
| 309 | /* we can assume that HAVE_LONG_LONG is true. if not, then the |
| 310 | configuration process should have bailed (having big pointers |
| 311 | without long longs seems non-sensical) */ |
| 312 | LONG_LONG x; |
| 313 | |
| 314 | if ( PyInt_Check(vv) ) |
| 315 | x = PyInt_AS_LONG(vv); |
| 316 | else |
| 317 | x = PyLong_AsLongLong(vv); |
| 318 | #endif /* SIZEOF_VOID_P == SIZEOF_LONG */ |
| 319 | |
| 320 | if (x == -1 && PyErr_Occurred()) |
| 321 | return NULL; |
| 322 | return (void *)x; |
| 323 | } |
| 324 | |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 325 | #ifdef HAVE_LONG_LONG |
| 326 | /* |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 327 | * LONG_LONG support by Chris Herborth (chrish@qnx.com) |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 328 | * |
| 329 | * For better or worse :-), I tried to follow the coding style already |
| 330 | * here. |
| 331 | */ |
| 332 | |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 333 | /* Create a new long int object from a C LONG_LONG int */ |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 334 | |
| 335 | PyObject * |
| 336 | PyLong_FromLongLong(ival) |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 337 | LONG_LONG ival; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 338 | { |
| 339 | #if SIZEOF_LONG_LONG == SIZEOF_LONG |
| 340 | /* In case the compiler is faking it. */ |
| 341 | return PyLong_FromLong( (long)ival ); |
| 342 | #else |
Fred Drake | 4c7fdfc | 2000-06-01 18:37:36 +0000 | [diff] [blame] | 343 | if ((LONG_LONG)LONG_MIN <= ival && ival <= (LONG_LONG)LONG_MAX) { |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 344 | return PyLong_FromLong( (long)ival ); |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 345 | } |
Fred Drake | 4c7fdfc | 2000-06-01 18:37:36 +0000 | [diff] [blame] | 346 | else if (0 <= ival && ival <= (unsigned LONG_LONG)ULONG_MAX) { |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 347 | return PyLong_FromUnsignedLong( (unsigned long)ival ); |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 348 | } |
| 349 | else { |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 350 | /* Assume a C LONG_LONG fits in at most 10 'digits'. |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 351 | * Should be OK if we're assuming long fits in 5. |
| 352 | */ |
| 353 | PyLongObject *v = _PyLong_New(10); |
| 354 | |
| 355 | if (v != NULL) { |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 356 | unsigned LONG_LONG t = ival; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 357 | int i; |
| 358 | if (ival < 0) { |
| 359 | t = -ival; |
| 360 | v->ob_size = -(v->ob_size); |
| 361 | } |
| 362 | |
| 363 | for (i = 0; i < 10; i++) { |
| 364 | v->ob_digit[i] = (digit) (t & MASK); |
| 365 | t >>= SHIFT; |
| 366 | } |
| 367 | |
| 368 | v = long_normalize(v); |
| 369 | } |
| 370 | |
| 371 | return (PyObject *)v; |
| 372 | } |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 373 | #endif |
| 374 | } |
| 375 | |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 376 | /* Create a new long int object from a C unsigned LONG_LONG int */ |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 377 | PyObject * |
| 378 | PyLong_FromUnsignedLongLong(ival) |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 379 | unsigned LONG_LONG ival; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 380 | { |
| 381 | #if SIZEOF_LONG_LONG == SIZEOF_LONG |
| 382 | /* In case the compiler is faking it. */ |
| 383 | return PyLong_FromUnsignedLong( (unsigned long)ival ); |
| 384 | #else |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 385 | if( ival <= (unsigned LONG_LONG)ULONG_MAX ) { |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 386 | return PyLong_FromUnsignedLong( (unsigned long)ival ); |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 387 | } |
| 388 | else { |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 389 | /* Assume a C long fits in at most 10 'digits'. */ |
| 390 | PyLongObject *v = _PyLong_New(10); |
| 391 | |
| 392 | if (v != NULL) { |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 393 | unsigned LONG_LONG t = ival; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 394 | int i; |
| 395 | for (i = 0; i < 10; i++) { |
| 396 | v->ob_digit[i] = (digit) (t & MASK); |
| 397 | t >>= SHIFT; |
| 398 | } |
| 399 | |
| 400 | v = long_normalize(v); |
| 401 | } |
| 402 | |
| 403 | return (PyObject *)v; |
| 404 | } |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 405 | #endif |
| 406 | } |
| 407 | |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 408 | /* Get a C LONG_LONG int from a long int object. |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 409 | Returns -1 and sets an error condition if overflow occurs. */ |
| 410 | |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 411 | LONG_LONG |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 412 | PyLong_AsLongLong(vv) |
| 413 | PyObject *vv; |
| 414 | { |
| 415 | #if SIZEOF_LONG_LONG == SIZEOF_LONG |
| 416 | /* In case the compiler is faking it. */ |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 417 | return (LONG_LONG)PyLong_AsLong( vv ); |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 418 | #else |
| 419 | register PyLongObject *v; |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 420 | LONG_LONG x, prev; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 421 | int i, sign; |
| 422 | |
| 423 | if (vv == NULL || !PyLong_Check(vv)) { |
| 424 | PyErr_BadInternalCall(); |
| 425 | return -1; |
| 426 | } |
| 427 | |
| 428 | v = (PyLongObject *)vv; |
| 429 | i = v->ob_size; |
| 430 | sign = 1; |
| 431 | x = 0; |
| 432 | |
| 433 | if (i < 0) { |
| 434 | sign = -1; |
| 435 | i = -(i); |
| 436 | } |
| 437 | |
| 438 | while (--i >= 0) { |
| 439 | prev = x; |
| 440 | x = (x << SHIFT) + v->ob_digit[i]; |
| 441 | if ((x >> SHIFT) != prev) { |
| 442 | PyErr_SetString(PyExc_OverflowError, |
| 443 | "long int too long to convert"); |
| 444 | return -1; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | return x * sign; |
| 449 | #endif |
| 450 | } |
| 451 | |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 452 | unsigned LONG_LONG |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 453 | PyLong_AsUnsignedLongLong(vv) |
| 454 | PyObject *vv; |
| 455 | { |
| 456 | #if SIZEOF_LONG_LONG == 4 |
| 457 | /* In case the compiler is faking it. */ |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 458 | return (unsigned LONG_LONG)PyLong_AsUnsignedLong( vv ); |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 459 | #else |
| 460 | register PyLongObject *v; |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 461 | unsigned LONG_LONG x, prev; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 462 | int i; |
| 463 | |
| 464 | if (vv == NULL || !PyLong_Check(vv)) { |
| 465 | PyErr_BadInternalCall(); |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 466 | return (unsigned LONG_LONG) -1; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | v = (PyLongObject *)vv; |
| 470 | i = v->ob_size; |
| 471 | x = 0; |
| 472 | |
| 473 | if (i < 0) { |
| 474 | PyErr_SetString(PyExc_OverflowError, |
| 475 | "can't convert negative value to unsigned long"); |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 476 | return (unsigned LONG_LONG) -1; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | while (--i >= 0) { |
| 480 | prev = x; |
| 481 | x = (x << SHIFT) + v->ob_digit[i]; |
| 482 | if ((x >> SHIFT) != prev) { |
| 483 | PyErr_SetString(PyExc_OverflowError, |
| 484 | "long int too long to convert"); |
Guido van Rossum | 3293b07 | 1998-08-25 16:07:15 +0000 | [diff] [blame] | 485 | return (unsigned LONG_LONG) -1; |
Guido van Rossum | 1a8791e | 1998-08-04 22:46:29 +0000 | [diff] [blame] | 486 | } |
| 487 | } |
| 488 | |
| 489 | return x; |
| 490 | #endif |
| 491 | } |
| 492 | #endif /* HAVE_LONG_LONG */ |
| 493 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 494 | /* Multiply by a single digit, ignoring the sign. */ |
| 495 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 496 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 497 | mul1(a, n) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 498 | PyLongObject *a; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 499 | wdigit n; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 500 | { |
| 501 | return muladd1(a, n, (digit)0); |
| 502 | } |
| 503 | |
| 504 | /* Multiply by a single digit and add a single digit, ignoring the sign. */ |
| 505 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 506 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 507 | muladd1(a, n, extra) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 508 | PyLongObject *a; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 509 | wdigit n; |
| 510 | wdigit extra; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 511 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 512 | int size_a = ABS(a->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 513 | PyLongObject *z = _PyLong_New(size_a+1); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 514 | twodigits carry = extra; |
| 515 | int i; |
| 516 | |
| 517 | if (z == NULL) |
| 518 | return NULL; |
| 519 | for (i = 0; i < size_a; ++i) { |
| 520 | carry += (twodigits)a->ob_digit[i] * n; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 521 | z->ob_digit[i] = (digit) (carry & MASK); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 522 | carry >>= SHIFT; |
| 523 | } |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 524 | z->ob_digit[i] = (digit) carry; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 525 | return long_normalize(z); |
| 526 | } |
| 527 | |
| 528 | /* Divide a long integer by a digit, returning both the quotient |
| 529 | (as function result) and the remainder (through *prem). |
| 530 | The sign of a is ignored; n should not be zero. */ |
| 531 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 532 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 533 | divrem1(a, n, prem) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 534 | PyLongObject *a; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 535 | wdigit n; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 536 | digit *prem; |
| 537 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 538 | int size = ABS(a->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 539 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 540 | int i; |
| 541 | twodigits rem = 0; |
| 542 | |
| 543 | assert(n > 0 && n <= MASK); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 544 | z = _PyLong_New(size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 545 | if (z == NULL) |
| 546 | return NULL; |
| 547 | for (i = size; --i >= 0; ) { |
| 548 | rem = (rem << SHIFT) + a->ob_digit[i]; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 549 | z->ob_digit[i] = (digit) (rem/n); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 550 | rem %= n; |
| 551 | } |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 552 | *prem = (digit) rem; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 553 | return long_normalize(z); |
| 554 | } |
| 555 | |
| 556 | /* Convert a long int object to a string, using a given conversion base. |
Guido van Rossum | 3d3037d | 1991-10-24 14:55:57 +0000 | [diff] [blame] | 557 | Return a string object. |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 558 | If base is 8 or 16, add the proper prefix '0' or '0x'. */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 559 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 560 | static PyObject * |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 561 | long_format(aa, base, addL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 562 | PyObject *aa; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 563 | int base; |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 564 | int addL; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 565 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 566 | register PyLongObject *a = (PyLongObject *)aa; |
| 567 | PyStringObject *str; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 568 | int i; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 569 | int size_a = ABS(a->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 570 | char *p; |
| 571 | int bits; |
| 572 | char sign = '\0'; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 573 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 574 | if (a == NULL || !PyLong_Check(a)) { |
| 575 | PyErr_BadInternalCall(); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 576 | return NULL; |
| 577 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 578 | assert(base >= 2 && base <= 36); |
| 579 | |
| 580 | /* Compute a rough upper bound for the length of the string */ |
| 581 | i = base; |
| 582 | bits = 0; |
| 583 | while (i > 1) { |
| 584 | ++bits; |
| 585 | i >>= 1; |
| 586 | } |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 587 | i = 5 + (addL ? 1 : 0) + (size_a*SHIFT + bits-1) / bits; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 588 | str = (PyStringObject *) PyString_FromStringAndSize((char *)0, i); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 589 | if (str == NULL) |
| 590 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 591 | p = PyString_AS_STRING(str) + i; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 592 | *p = '\0'; |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 593 | if (addL) |
| 594 | *--p = 'L'; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 595 | if (a->ob_size < 0) |
| 596 | sign = '-'; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 597 | |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 598 | if (a->ob_size == 0) { |
| 599 | *--p = '0'; |
| 600 | } |
| 601 | else if ((base & (base - 1)) == 0) { |
| 602 | /* JRH: special case for power-of-2 bases */ |
| 603 | twodigits temp = a->ob_digit[0]; |
| 604 | int bitsleft = SHIFT; |
| 605 | int rem; |
| 606 | int last = abs(a->ob_size); |
| 607 | int basebits = 1; |
| 608 | i = base; |
| 609 | while ((i >>= 1) > 1) ++basebits; |
| 610 | |
| 611 | i = 0; |
| 612 | for (;;) { |
| 613 | while (bitsleft >= basebits) { |
| 614 | if ((temp == 0) && (i >= last - 1)) break; |
| 615 | rem = temp & (base - 1); |
| 616 | if (rem < 10) |
| 617 | rem += '0'; |
| 618 | else |
| 619 | rem += 'A' - 10; |
| 620 | assert(p > PyString_AS_STRING(str)); |
| 621 | *--p = (char) rem; |
| 622 | bitsleft -= basebits; |
| 623 | temp >>= basebits; |
| 624 | } |
| 625 | if (++i >= last) { |
| 626 | if (temp == 0) break; |
| 627 | bitsleft = 99; |
| 628 | /* loop again to pick up final digits */ |
| 629 | } |
| 630 | else { |
| 631 | temp = (a->ob_digit[i] << bitsleft) | temp; |
| 632 | bitsleft += SHIFT; |
| 633 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 634 | } |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 635 | } |
| 636 | else { |
| 637 | Py_INCREF(a); |
| 638 | do { |
| 639 | digit rem; |
| 640 | PyLongObject *temp = divrem1(a, (digit)base, &rem); |
| 641 | if (temp == NULL) { |
| 642 | Py_DECREF(a); |
| 643 | Py_DECREF(str); |
| 644 | return NULL; |
| 645 | } |
| 646 | if (rem < 10) |
| 647 | rem += '0'; |
| 648 | else |
| 649 | rem += 'A'-10; |
| 650 | assert(p > PyString_AS_STRING(str)); |
| 651 | *--p = (char) rem; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 652 | Py_DECREF(a); |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 653 | a = temp; |
| 654 | SIGCHECK({ |
| 655 | Py_DECREF(a); |
| 656 | Py_DECREF(str); |
| 657 | return NULL; |
| 658 | }) |
| 659 | } while (ABS(a->ob_size) != 0); |
| 660 | Py_DECREF(a); |
| 661 | } |
| 662 | |
Guido van Rossum | 2c47542 | 1992-08-14 15:13:07 +0000 | [diff] [blame] | 663 | if (base == 8) { |
| 664 | if (size_a != 0) |
| 665 | *--p = '0'; |
| 666 | } |
Guido van Rossum | 3d3037d | 1991-10-24 14:55:57 +0000 | [diff] [blame] | 667 | else if (base == 16) { |
| 668 | *--p = 'x'; |
| 669 | *--p = '0'; |
| 670 | } |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 671 | else if (base != 10) { |
| 672 | *--p = '#'; |
| 673 | *--p = '0' + base%10; |
| 674 | if (base > 10) |
| 675 | *--p = '0' + base/10; |
| 676 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 677 | if (sign) |
| 678 | *--p = sign; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 679 | if (p != PyString_AS_STRING(str)) { |
| 680 | char *q = PyString_AS_STRING(str); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 681 | assert(p > q); |
| 682 | do { |
| 683 | } while ((*q++ = *p++) != '\0'); |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 684 | q--; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 685 | _PyString_Resize((PyObject **)&str, |
| 686 | (int) (q - PyString_AS_STRING(str))); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 687 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 688 | return (PyObject *)str; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 689 | } |
| 690 | |
Guido van Rossum | 3535f6e | 1995-01-17 16:34:13 +0000 | [diff] [blame] | 691 | #if 0 |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 692 | /* Convert a string to a long int object, in a given base. |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 693 | Base zero implies a default depending on the number. |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 694 | External linkage: used in compile.c and stropmodule.c. */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 695 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 696 | PyObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 697 | long_scan(str, base) |
| 698 | char *str; |
| 699 | int base; |
| 700 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 701 | return PyLong_FromString(str, (char **)NULL, base); |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 702 | } |
Guido van Rossum | 3535f6e | 1995-01-17 16:34:13 +0000 | [diff] [blame] | 703 | #endif |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 704 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 705 | PyObject * |
| 706 | PyLong_FromString(str, pend, base) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 707 | char *str; |
| 708 | char **pend; |
| 709 | int base; |
| 710 | { |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 711 | int sign = 1; |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 712 | char *start, *orig_str = str; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 713 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 714 | |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 715 | if ((base != 0 && base < 2) || base > 36) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 716 | PyErr_SetString(PyExc_ValueError, |
| 717 | "invalid base for long literal"); |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 718 | return NULL; |
| 719 | } |
Guido van Rossum | 9fa2c11 | 1995-02-10 17:00:37 +0000 | [diff] [blame] | 720 | while (*str != '\0' && isspace(Py_CHARMASK(*str))) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 721 | str++; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 722 | if (*str == '+') |
| 723 | ++str; |
| 724 | else if (*str == '-') { |
| 725 | ++str; |
| 726 | sign = -1; |
| 727 | } |
Guido van Rossum | 9fa2c11 | 1995-02-10 17:00:37 +0000 | [diff] [blame] | 728 | while (*str != '\0' && isspace(Py_CHARMASK(*str))) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 729 | str++; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 730 | if (base == 0) { |
| 731 | if (str[0] != '0') |
| 732 | base = 10; |
| 733 | else if (str[1] == 'x' || str[1] == 'X') |
| 734 | base = 16; |
| 735 | else |
| 736 | base = 8; |
| 737 | } |
| 738 | if (base == 16 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) |
| 739 | str += 2; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 740 | z = _PyLong_New(0); |
Guido van Rossum | e676297 | 1998-06-22 03:54:46 +0000 | [diff] [blame] | 741 | start = str; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 742 | for ( ; z != NULL; ++str) { |
| 743 | int k = -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 744 | PyLongObject *temp; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 745 | |
| 746 | if (*str <= '9') |
| 747 | k = *str - '0'; |
| 748 | else if (*str >= 'a') |
| 749 | k = *str - 'a' + 10; |
| 750 | else if (*str >= 'A') |
| 751 | k = *str - 'A' + 10; |
| 752 | if (k < 0 || k >= base) |
| 753 | break; |
| 754 | temp = muladd1(z, (digit)base, (digit)k); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 755 | Py_DECREF(z); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 756 | z = temp; |
| 757 | } |
Guido van Rossum | ac6a37a | 1998-08-04 15:04:06 +0000 | [diff] [blame] | 758 | if (z == NULL) |
| 759 | return NULL; |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 760 | if (str == start) |
| 761 | goto onError; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 762 | if (sign < 0 && z != NULL && z->ob_size != 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 763 | z->ob_size = -(z->ob_size); |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 764 | if (*str == 'L' || *str == 'l') |
| 765 | str++; |
| 766 | while (*str && isspace(Py_CHARMASK(*str))) |
| 767 | str++; |
| 768 | if (*str != '\0') |
| 769 | goto onError; |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 770 | if (pend) |
| 771 | *pend = str; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 772 | return (PyObject *) z; |
Guido van Rossum | 9e896b3 | 2000-04-05 20:11:21 +0000 | [diff] [blame] | 773 | |
| 774 | onError: |
| 775 | PyErr_Format(PyExc_ValueError, |
| 776 | "invalid literal for long(): %.200s", orig_str); |
| 777 | Py_XDECREF(z); |
| 778 | return NULL; |
| 779 | } |
| 780 | |
| 781 | PyObject * |
| 782 | PyLong_FromUnicode(u, length, base) |
| 783 | Py_UNICODE *u; |
| 784 | int length; |
| 785 | int base; |
| 786 | { |
| 787 | char buffer[256]; |
| 788 | |
| 789 | if (length >= sizeof(buffer)) { |
| 790 | PyErr_SetString(PyExc_ValueError, |
| 791 | "long() literal too large to convert"); |
| 792 | return NULL; |
| 793 | } |
| 794 | if (PyUnicode_EncodeDecimal(u, length, buffer, NULL)) |
| 795 | return NULL; |
| 796 | |
| 797 | return PyLong_FromString(buffer, NULL, base); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 798 | } |
| 799 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 800 | static PyLongObject *x_divrem |
| 801 | Py_PROTO((PyLongObject *, PyLongObject *, PyLongObject **)); |
| 802 | static PyObject *long_pos Py_PROTO((PyLongObject *)); |
Guido van Rossum | 1109fbc | 1998-04-10 22:16:39 +0000 | [diff] [blame] | 803 | static int long_divrem Py_PROTO((PyLongObject *, PyLongObject *, |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 804 | PyLongObject **, PyLongObject **)); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 805 | |
| 806 | /* Long division with remainder, top-level routine */ |
| 807 | |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 808 | static int |
| 809 | long_divrem(a, b, pdiv, prem) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 810 | PyLongObject *a, *b; |
| 811 | PyLongObject **pdiv; |
| 812 | PyLongObject **prem; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 813 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 814 | int size_a = ABS(a->ob_size), size_b = ABS(b->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 815 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 816 | |
| 817 | if (size_b == 0) { |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 818 | PyErr_SetString(PyExc_ZeroDivisionError, |
| 819 | "long division or modulo"); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 820 | return -1; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 821 | } |
| 822 | if (size_a < size_b || |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 823 | (size_a == size_b && |
| 824 | a->ob_digit[size_a-1] < b->ob_digit[size_b-1])) { |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 825 | /* |a| < |b|. */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 826 | *pdiv = _PyLong_New(0); |
| 827 | Py_INCREF(a); |
| 828 | *prem = (PyLongObject *) a; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 829 | return 0; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 830 | } |
| 831 | if (size_b == 1) { |
| 832 | digit rem = 0; |
| 833 | z = divrem1(a, b->ob_digit[0], &rem); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 834 | if (z == NULL) |
| 835 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 836 | *prem = (PyLongObject *) PyLong_FromLong((long)rem); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 837 | } |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 838 | else { |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 839 | z = x_divrem(a, b, prem); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 840 | if (z == NULL) |
| 841 | return -1; |
| 842 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 843 | /* Set the signs. |
| 844 | The quotient z has the sign of a*b; |
| 845 | the remainder r has the sign of a, |
| 846 | so a = b*z + r. */ |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 847 | if ((a->ob_size < 0) != (b->ob_size < 0)) |
| 848 | z->ob_size = -(z->ob_size); |
| 849 | if (a->ob_size < 0 && (*prem)->ob_size != 0) |
| 850 | (*prem)->ob_size = -((*prem)->ob_size); |
| 851 | *pdiv = z; |
| 852 | return 0; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 853 | } |
| 854 | |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 855 | /* Unsigned long division with remainder -- the algorithm */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 856 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 857 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 858 | x_divrem(v1, w1, prem) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 859 | PyLongObject *v1, *w1; |
| 860 | PyLongObject **prem; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 861 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 862 | int size_v = ABS(v1->ob_size), size_w = ABS(w1->ob_size); |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 863 | digit d = (digit) ((twodigits)BASE / (w1->ob_digit[size_w-1] + 1)); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 864 | PyLongObject *v = mul1(v1, d); |
| 865 | PyLongObject *w = mul1(w1, d); |
| 866 | PyLongObject *a; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 867 | int j, k; |
| 868 | |
| 869 | if (v == NULL || w == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 870 | Py_XDECREF(v); |
| 871 | Py_XDECREF(w); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 872 | return NULL; |
| 873 | } |
| 874 | |
| 875 | assert(size_v >= size_w && size_w > 1); /* Assert checks by div() */ |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 876 | assert(v->ob_refcnt == 1); /* Since v will be used as accumulator! */ |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 877 | assert(size_w == ABS(w->ob_size)); /* That's how d was calculated */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 878 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 879 | size_v = ABS(v->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 880 | a = _PyLong_New(size_v - size_w + 1); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 881 | |
| 882 | for (j = size_v, k = a->ob_size-1; a != NULL && k >= 0; --j, --k) { |
| 883 | digit vj = (j >= size_v) ? 0 : v->ob_digit[j]; |
| 884 | twodigits q; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 885 | stwodigits carry = 0; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 886 | int i; |
| 887 | |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 888 | SIGCHECK({ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 889 | Py_DECREF(a); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 890 | a = NULL; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 891 | break; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 892 | }) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 893 | if (vj == w->ob_digit[size_w-1]) |
| 894 | q = MASK; |
| 895 | else |
| 896 | q = (((twodigits)vj << SHIFT) + v->ob_digit[j-1]) / |
| 897 | w->ob_digit[size_w-1]; |
| 898 | |
| 899 | while (w->ob_digit[size_w-2]*q > |
| 900 | (( |
| 901 | ((twodigits)vj << SHIFT) |
| 902 | + v->ob_digit[j-1] |
| 903 | - q*w->ob_digit[size_w-1] |
| 904 | ) << SHIFT) |
| 905 | + v->ob_digit[j-2]) |
| 906 | --q; |
| 907 | |
| 908 | for (i = 0; i < size_w && i+k < size_v; ++i) { |
| 909 | twodigits z = w->ob_digit[i] * q; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 910 | digit zz = (digit) (z >> SHIFT); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 911 | carry += v->ob_digit[i+k] - z |
| 912 | + ((twodigits)zz << SHIFT); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 913 | v->ob_digit[i+k] = carry & MASK; |
| 914 | carry = (carry >> SHIFT) - zz; |
| 915 | } |
| 916 | |
| 917 | if (i+k < size_v) { |
| 918 | carry += v->ob_digit[i+k]; |
| 919 | v->ob_digit[i+k] = 0; |
| 920 | } |
| 921 | |
| 922 | if (carry == 0) |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 923 | a->ob_digit[k] = (digit) q; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 924 | else { |
| 925 | assert(carry == -1); |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 926 | a->ob_digit[k] = (digit) q-1; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 927 | carry = 0; |
| 928 | for (i = 0; i < size_w && i+k < size_v; ++i) { |
| 929 | carry += v->ob_digit[i+k] + w->ob_digit[i]; |
| 930 | v->ob_digit[i+k] = carry & MASK; |
| 931 | carry >>= SHIFT; |
| 932 | } |
| 933 | } |
| 934 | } /* for j, k */ |
| 935 | |
Guido van Rossum | c206c76 | 1995-01-10 15:23:19 +0000 | [diff] [blame] | 936 | if (a == NULL) |
| 937 | *prem = NULL; |
| 938 | else { |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 939 | a = long_normalize(a); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 940 | *prem = divrem1(v, d, &d); |
| 941 | /* d receives the (unused) remainder */ |
| 942 | if (*prem == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 943 | Py_DECREF(a); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 944 | a = NULL; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 945 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 946 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 947 | Py_DECREF(v); |
| 948 | Py_DECREF(w); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 949 | return a; |
| 950 | } |
| 951 | |
| 952 | /* Methods */ |
| 953 | |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 954 | /* Forward */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 955 | static void long_dealloc Py_PROTO((PyObject *)); |
| 956 | static PyObject *long_repr Py_PROTO((PyObject *)); |
| 957 | static int long_compare Py_PROTO((PyLongObject *, PyLongObject *)); |
Guido van Rossum | 065ce5a | 1998-09-13 15:37:20 +0000 | [diff] [blame] | 958 | static long long_hash Py_PROTO((PyLongObject *)); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 959 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 960 | static PyObject *long_add Py_PROTO((PyLongObject *, PyLongObject *)); |
| 961 | static PyObject *long_sub Py_PROTO((PyLongObject *, PyLongObject *)); |
| 962 | static PyObject *long_mul Py_PROTO((PyLongObject *, PyLongObject *)); |
| 963 | static PyObject *long_div Py_PROTO((PyLongObject *, PyLongObject *)); |
| 964 | static PyObject *long_mod Py_PROTO((PyLongObject *, PyLongObject *)); |
| 965 | static PyObject *long_divmod Py_PROTO((PyLongObject *, PyLongObject *)); |
| 966 | static PyObject *long_pow |
| 967 | Py_PROTO((PyLongObject *, PyLongObject *, PyLongObject *)); |
| 968 | static PyObject *long_neg Py_PROTO((PyLongObject *)); |
| 969 | static PyObject *long_pos Py_PROTO((PyLongObject *)); |
| 970 | static PyObject *long_abs Py_PROTO((PyLongObject *)); |
| 971 | static int long_nonzero Py_PROTO((PyLongObject *)); |
| 972 | static PyObject *long_invert Py_PROTO((PyLongObject *)); |
| 973 | static PyObject *long_lshift Py_PROTO((PyLongObject *, PyLongObject *)); |
| 974 | static PyObject *long_rshift Py_PROTO((PyLongObject *, PyLongObject *)); |
| 975 | static PyObject *long_and Py_PROTO((PyLongObject *, PyLongObject *)); |
| 976 | static PyObject *long_xor Py_PROTO((PyLongObject *, PyLongObject *)); |
| 977 | static PyObject *long_or Py_PROTO((PyLongObject *, PyLongObject *)); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 978 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 979 | static void |
| 980 | long_dealloc(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 981 | PyObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 982 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 983 | PyObject_DEL(v); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 984 | } |
| 985 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 986 | static PyObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 987 | long_repr(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 988 | PyObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 989 | { |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 990 | return long_format(v, 10, 1); |
| 991 | } |
| 992 | |
| 993 | static PyObject * |
| 994 | long_str(v) |
| 995 | PyObject *v; |
| 996 | { |
| 997 | return long_format(v, 10, 0); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | static int |
| 1001 | long_compare(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1002 | PyLongObject *a, *b; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1003 | { |
| 1004 | int sign; |
| 1005 | |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1006 | if (a->ob_size != b->ob_size) { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1007 | if (ABS(a->ob_size) == 0 && ABS(b->ob_size) == 0) |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1008 | sign = 0; |
| 1009 | else |
| 1010 | sign = a->ob_size - b->ob_size; |
| 1011 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1012 | else { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1013 | int i = ABS(a->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1014 | while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i]) |
| 1015 | ; |
| 1016 | if (i < 0) |
| 1017 | sign = 0; |
Guido van Rossum | 0b0db8e | 1993-01-21 16:07:51 +0000 | [diff] [blame] | 1018 | else { |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1019 | sign = (int)a->ob_digit[i] - (int)b->ob_digit[i]; |
Guido van Rossum | 0b0db8e | 1993-01-21 16:07:51 +0000 | [diff] [blame] | 1020 | if (a->ob_size < 0) |
| 1021 | sign = -sign; |
| 1022 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1023 | } |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1024 | return sign < 0 ? -1 : sign > 0 ? 1 : 0; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1025 | } |
| 1026 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1027 | static long |
| 1028 | long_hash(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1029 | PyLongObject *v; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1030 | { |
| 1031 | long x; |
| 1032 | int i, sign; |
| 1033 | |
| 1034 | /* This is designed so that Python ints and longs with the |
| 1035 | same value hash to the same value, otherwise comparisons |
| 1036 | of mapping keys will turn out weird */ |
| 1037 | i = v->ob_size; |
| 1038 | sign = 1; |
| 1039 | x = 0; |
| 1040 | if (i < 0) { |
| 1041 | sign = -1; |
| 1042 | i = -(i); |
| 1043 | } |
| 1044 | while (--i >= 0) { |
| 1045 | /* Force a 32-bit circular shift */ |
| 1046 | x = ((x << SHIFT) & ~MASK) | ((x >> (32-SHIFT)) & MASK); |
| 1047 | x += v->ob_digit[i]; |
| 1048 | } |
| 1049 | x = x * sign; |
| 1050 | if (x == -1) |
| 1051 | x = -2; |
| 1052 | return x; |
| 1053 | } |
| 1054 | |
| 1055 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1056 | /* Add the absolute values of two long integers. */ |
| 1057 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1058 | static PyLongObject *x_add Py_PROTO((PyLongObject *, PyLongObject *)); |
| 1059 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1060 | x_add(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1061 | PyLongObject *a, *b; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1062 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1063 | int size_a = ABS(a->ob_size), size_b = ABS(b->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1064 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1065 | int i; |
| 1066 | digit carry = 0; |
| 1067 | |
| 1068 | /* Ensure a is the larger of the two: */ |
| 1069 | if (size_a < size_b) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1070 | { PyLongObject *temp = a; a = b; b = temp; } |
| 1071 | { int size_temp = size_a; |
| 1072 | size_a = size_b; |
| 1073 | size_b = size_temp; } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1074 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1075 | z = _PyLong_New(size_a+1); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1076 | if (z == NULL) |
| 1077 | return NULL; |
| 1078 | for (i = 0; i < size_b; ++i) { |
| 1079 | carry += a->ob_digit[i] + b->ob_digit[i]; |
| 1080 | z->ob_digit[i] = carry & MASK; |
| 1081 | /* The following assumes unsigned shifts don't |
| 1082 | propagate the sign bit. */ |
| 1083 | carry >>= SHIFT; |
| 1084 | } |
| 1085 | for (; i < size_a; ++i) { |
| 1086 | carry += a->ob_digit[i]; |
| 1087 | z->ob_digit[i] = carry & MASK; |
| 1088 | carry >>= SHIFT; |
| 1089 | } |
| 1090 | z->ob_digit[i] = carry; |
| 1091 | return long_normalize(z); |
| 1092 | } |
| 1093 | |
| 1094 | /* Subtract the absolute values of two integers. */ |
| 1095 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1096 | static PyLongObject *x_sub Py_PROTO((PyLongObject *, PyLongObject *)); |
| 1097 | static PyLongObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1098 | x_sub(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1099 | PyLongObject *a, *b; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1100 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1101 | int size_a = ABS(a->ob_size), size_b = ABS(b->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1102 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1103 | int i; |
| 1104 | int sign = 1; |
| 1105 | digit borrow = 0; |
| 1106 | |
| 1107 | /* Ensure a is the larger of the two: */ |
| 1108 | if (size_a < size_b) { |
| 1109 | sign = -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1110 | { PyLongObject *temp = a; a = b; b = temp; } |
| 1111 | { int size_temp = size_a; |
| 1112 | size_a = size_b; |
| 1113 | size_b = size_temp; } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1114 | } |
| 1115 | else if (size_a == size_b) { |
| 1116 | /* Find highest digit where a and b differ: */ |
| 1117 | i = size_a; |
| 1118 | while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i]) |
| 1119 | ; |
| 1120 | if (i < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1121 | return _PyLong_New(0); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1122 | if (a->ob_digit[i] < b->ob_digit[i]) { |
| 1123 | sign = -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1124 | { PyLongObject *temp = a; a = b; b = temp; } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1125 | } |
| 1126 | size_a = size_b = i+1; |
| 1127 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1128 | z = _PyLong_New(size_a); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1129 | if (z == NULL) |
| 1130 | return NULL; |
| 1131 | for (i = 0; i < size_b; ++i) { |
| 1132 | /* The following assumes unsigned arithmetic |
| 1133 | works module 2**N for some N>SHIFT. */ |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1134 | borrow = a->ob_digit[i] - b->ob_digit[i] - borrow; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1135 | z->ob_digit[i] = borrow & MASK; |
| 1136 | borrow >>= SHIFT; |
| 1137 | borrow &= 1; /* Keep only one sign bit */ |
| 1138 | } |
| 1139 | for (; i < size_a; ++i) { |
| 1140 | borrow = a->ob_digit[i] - borrow; |
| 1141 | z->ob_digit[i] = borrow & MASK; |
| 1142 | borrow >>= SHIFT; |
| 1143 | } |
| 1144 | assert(borrow == 0); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1145 | if (sign < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1146 | z->ob_size = -(z->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1147 | return long_normalize(z); |
| 1148 | } |
| 1149 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1150 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1151 | long_add(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1152 | PyLongObject *a; |
| 1153 | PyLongObject *b; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1154 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1155 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1156 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1157 | if (a->ob_size < 0) { |
| 1158 | if (b->ob_size < 0) { |
| 1159 | z = x_add(a, b); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1160 | if (z != NULL && z->ob_size != 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1161 | z->ob_size = -(z->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1162 | } |
| 1163 | else |
| 1164 | z = x_sub(b, a); |
| 1165 | } |
| 1166 | else { |
| 1167 | if (b->ob_size < 0) |
| 1168 | z = x_sub(a, b); |
| 1169 | else |
| 1170 | z = x_add(a, b); |
| 1171 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1172 | return (PyObject *)z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1173 | } |
| 1174 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1175 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1176 | long_sub(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1177 | PyLongObject *a; |
| 1178 | PyLongObject *b; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1179 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1180 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1181 | |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1182 | if (a->ob_size < 0) { |
| 1183 | if (b->ob_size < 0) |
| 1184 | z = x_sub(a, b); |
| 1185 | else |
| 1186 | z = x_add(a, b); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1187 | if (z != NULL && z->ob_size != 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1188 | z->ob_size = -(z->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1189 | } |
| 1190 | else { |
| 1191 | if (b->ob_size < 0) |
| 1192 | z = x_add(a, b); |
| 1193 | else |
| 1194 | z = x_sub(a, b); |
| 1195 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1196 | return (PyObject *)z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1197 | } |
| 1198 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1199 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1200 | long_mul(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1201 | PyLongObject *a; |
| 1202 | PyLongObject *b; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1203 | { |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1204 | int size_a; |
| 1205 | int size_b; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1206 | PyLongObject *z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1207 | int i; |
| 1208 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1209 | size_a = ABS(a->ob_size); |
| 1210 | size_b = ABS(b->ob_size); |
Guido van Rossum | ba71a24 | 2000-04-10 17:31:58 +0000 | [diff] [blame] | 1211 | if (size_a > size_b) { |
| 1212 | /* we are faster with the small object on the left */ |
| 1213 | int hold_sa = size_a; |
| 1214 | PyLongObject *hold_a = a; |
| 1215 | size_a = size_b; |
| 1216 | size_b = hold_sa; |
| 1217 | a = b; |
| 1218 | b = hold_a; |
| 1219 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1220 | z = _PyLong_New(size_a + size_b); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1221 | if (z == NULL) |
| 1222 | return NULL; |
| 1223 | for (i = 0; i < z->ob_size; ++i) |
| 1224 | z->ob_digit[i] = 0; |
| 1225 | for (i = 0; i < size_a; ++i) { |
| 1226 | twodigits carry = 0; |
| 1227 | twodigits f = a->ob_digit[i]; |
| 1228 | int j; |
| 1229 | |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1230 | SIGCHECK({ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1231 | Py_DECREF(z); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1232 | return NULL; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 1233 | }) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1234 | for (j = 0; j < size_b; ++j) { |
| 1235 | carry += z->ob_digit[i+j] + b->ob_digit[j] * f; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 1236 | z->ob_digit[i+j] = (digit) (carry & MASK); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1237 | carry >>= SHIFT; |
| 1238 | } |
| 1239 | for (; carry != 0; ++j) { |
| 1240 | assert(i+j < z->ob_size); |
| 1241 | carry += z->ob_digit[i+j]; |
Guido van Rossum | 2095d24 | 1997-04-09 19:41:24 +0000 | [diff] [blame] | 1242 | z->ob_digit[i+j] = (digit) (carry & MASK); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1243 | carry >>= SHIFT; |
| 1244 | } |
| 1245 | } |
| 1246 | if (a->ob_size < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1247 | z->ob_size = -(z->ob_size); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1248 | if (b->ob_size < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1249 | z->ob_size = -(z->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1250 | return (PyObject *) long_normalize(z); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1251 | } |
| 1252 | |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1253 | /* The / and % operators are now defined in terms of divmod(). |
| 1254 | The expression a mod b has the value a - b*floor(a/b). |
| 1255 | The long_divrem function gives the remainder after division of |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1256 | |a| by |b|, with the sign of a. This is also expressed |
| 1257 | as a - b*trunc(a/b), if trunc truncates towards zero. |
| 1258 | Some examples: |
| 1259 | a b a rem b a mod b |
| 1260 | 13 10 3 3 |
| 1261 | -13 10 -3 7 |
| 1262 | 13 -10 3 -7 |
| 1263 | -13 -10 -3 -3 |
| 1264 | So, to get from rem to mod, we have to add b if a and b |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 1265 | have different signs. We then subtract one from the 'div' |
| 1266 | part of the outcome to keep the invariant intact. */ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1267 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1268 | static int l_divmod Py_PROTO((PyLongObject *, PyLongObject *, |
| 1269 | PyLongObject **, PyLongObject **)); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1270 | static int |
| 1271 | l_divmod(v, w, pdiv, pmod) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1272 | PyLongObject *v; |
| 1273 | PyLongObject *w; |
| 1274 | PyLongObject **pdiv; |
| 1275 | PyLongObject **pmod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1276 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1277 | PyLongObject *div, *mod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1278 | |
| 1279 | if (long_divrem(v, w, &div, &mod) < 0) |
| 1280 | return -1; |
Guido van Rossum | 472c04f | 1996-12-05 21:57:21 +0000 | [diff] [blame] | 1281 | if ((mod->ob_size < 0 && w->ob_size > 0) || |
| 1282 | (mod->ob_size > 0 && w->ob_size < 0)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1283 | PyLongObject *temp; |
| 1284 | PyLongObject *one; |
| 1285 | temp = (PyLongObject *) long_add(mod, w); |
| 1286 | Py_DECREF(mod); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1287 | mod = temp; |
| 1288 | if (mod == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1289 | Py_DECREF(div); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1290 | return -1; |
| 1291 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1292 | one = (PyLongObject *) PyLong_FromLong(1L); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1293 | if (one == NULL || |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1294 | (temp = (PyLongObject *) long_sub(div, one)) == NULL) { |
| 1295 | Py_DECREF(mod); |
| 1296 | Py_DECREF(div); |
| 1297 | Py_XDECREF(one); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1298 | return -1; |
| 1299 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1300 | Py_DECREF(one); |
| 1301 | Py_DECREF(div); |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1302 | div = temp; |
| 1303 | } |
| 1304 | *pdiv = div; |
| 1305 | *pmod = mod; |
| 1306 | return 0; |
| 1307 | } |
| 1308 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1309 | static PyObject * |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1310 | long_div(v, w) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1311 | PyLongObject *v; |
| 1312 | PyLongObject *w; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1313 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1314 | PyLongObject *div, *mod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1315 | if (l_divmod(v, w, &div, &mod) < 0) |
| 1316 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1317 | Py_DECREF(mod); |
| 1318 | return (PyObject *)div; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1319 | } |
| 1320 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1321 | static PyObject * |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1322 | long_mod(v, w) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1323 | PyLongObject *v; |
| 1324 | PyLongObject *w; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1325 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1326 | PyLongObject *div, *mod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1327 | if (l_divmod(v, w, &div, &mod) < 0) |
| 1328 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1329 | Py_DECREF(div); |
| 1330 | return (PyObject *)mod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1331 | } |
| 1332 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1333 | static PyObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1334 | long_divmod(v, w) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1335 | PyLongObject *v; |
| 1336 | PyLongObject *w; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1337 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1338 | PyObject *z; |
| 1339 | PyLongObject *div, *mod; |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1340 | if (l_divmod(v, w, &div, &mod) < 0) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1341 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1342 | z = PyTuple_New(2); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1343 | if (z != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1344 | PyTuple_SetItem(z, 0, (PyObject *) div); |
| 1345 | PyTuple_SetItem(z, 1, (PyObject *) mod); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1346 | } |
| 1347 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1348 | Py_DECREF(div); |
| 1349 | Py_DECREF(mod); |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1350 | } |
| 1351 | return z; |
| 1352 | } |
| 1353 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1354 | static PyObject * |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1355 | long_pow(a, b, c) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1356 | PyLongObject *a; |
| 1357 | PyLongObject *b; |
| 1358 | PyLongObject *c; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1359 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1360 | PyLongObject *z, *div, *mod; |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1361 | int size_b, i; |
| 1362 | |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1363 | size_b = b->ob_size; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1364 | if (size_b < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1365 | PyErr_SetString(PyExc_ValueError, |
| 1366 | "long integer to the negative power"); |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1367 | return NULL; |
| 1368 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1369 | z = (PyLongObject *)PyLong_FromLong(1L); |
| 1370 | Py_INCREF(a); |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1371 | for (i = 0; i < size_b; ++i) { |
| 1372 | digit bi = b->ob_digit[i]; |
| 1373 | int j; |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1374 | |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1375 | for (j = 0; j < SHIFT; ++j) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1376 | PyLongObject *temp; |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1377 | |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1378 | if (bi & 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1379 | temp = (PyLongObject *)long_mul(z, a); |
| 1380 | Py_DECREF(z); |
| 1381 | if ((PyObject*)c!=Py_None && temp!=NULL) { |
Guido van Rossum | 2c7b8fe | 1999-10-11 22:34:41 +0000 | [diff] [blame] | 1382 | if (l_divmod(temp,c,&div,&mod) < 0) { |
| 1383 | Py_DECREF(temp); |
| 1384 | z = NULL; |
| 1385 | goto error; |
| 1386 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1387 | Py_XDECREF(div); |
| 1388 | Py_DECREF(temp); |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1389 | temp = mod; |
| 1390 | } |
| 1391 | z = temp; |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1392 | if (z == NULL) |
| 1393 | break; |
| 1394 | } |
| 1395 | bi >>= 1; |
| 1396 | if (bi == 0 && i+1 == size_b) |
| 1397 | break; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1398 | temp = (PyLongObject *)long_mul(a, a); |
| 1399 | Py_DECREF(a); |
| 1400 | if ((PyObject*)c!=Py_None && temp!=NULL) { |
Guido van Rossum | 2c7b8fe | 1999-10-11 22:34:41 +0000 | [diff] [blame] | 1401 | if (l_divmod(temp, c, &div, &mod) < 0) { |
| 1402 | Py_DECREF(temp); |
| 1403 | z = NULL; |
| 1404 | goto error; |
| 1405 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1406 | Py_XDECREF(div); |
| 1407 | Py_DECREF(temp); |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1408 | temp = mod; |
| 1409 | } |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1410 | a = temp; |
| 1411 | if (a == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1412 | Py_DECREF(z); |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1413 | z = NULL; |
| 1414 | break; |
| 1415 | } |
| 1416 | } |
Guido van Rossum | c206c76 | 1995-01-10 15:23:19 +0000 | [diff] [blame] | 1417 | if (a == NULL || z == NULL) |
Guido van Rossum | c7ec9c9 | 1991-05-28 21:58:16 +0000 | [diff] [blame] | 1418 | break; |
| 1419 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1420 | Py_XDECREF(a); |
| 1421 | if ((PyObject*)c!=Py_None && z!=NULL) { |
Guido van Rossum | 2c7b8fe | 1999-10-11 22:34:41 +0000 | [diff] [blame] | 1422 | if (l_divmod(z, c, &div, &mod) < 0) { |
| 1423 | Py_DECREF(z); |
| 1424 | z = NULL; |
| 1425 | } |
| 1426 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1427 | Py_XDECREF(div); |
| 1428 | Py_DECREF(z); |
Guido van Rossum | 2c7b8fe | 1999-10-11 22:34:41 +0000 | [diff] [blame] | 1429 | z = mod; |
| 1430 | } |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1431 | } |
Guido van Rossum | 2c7b8fe | 1999-10-11 22:34:41 +0000 | [diff] [blame] | 1432 | error: |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1433 | return (PyObject *)z; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1434 | } |
| 1435 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1436 | static PyObject * |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1437 | long_invert(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1438 | PyLongObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1439 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1440 | /* Implement ~x as -(x+1) */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1441 | PyLongObject *x; |
| 1442 | PyLongObject *w; |
| 1443 | w = (PyLongObject *)PyLong_FromLong(1L); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1444 | if (w == NULL) |
| 1445 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1446 | x = (PyLongObject *) long_add(v, w); |
| 1447 | Py_DECREF(w); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1448 | if (x == NULL) |
| 1449 | return NULL; |
| 1450 | if (x->ob_size != 0) |
| 1451 | x->ob_size = -(x->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1452 | return (PyObject *)x; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1455 | static PyObject * |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1456 | long_pos(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1457 | PyLongObject *v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1458 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1459 | Py_INCREF(v); |
| 1460 | return (PyObject *)v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1461 | } |
| 1462 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1463 | static PyObject * |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1464 | long_neg(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1465 | PyLongObject *v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1466 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1467 | PyLongObject *z; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1468 | int i, n; |
| 1469 | n = ABS(v->ob_size); |
| 1470 | if (n == 0) { |
| 1471 | /* -0 == 0 */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1472 | Py_INCREF(v); |
| 1473 | return (PyObject *) v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1474 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1475 | z = _PyLong_New(ABS(n)); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1476 | if (z == NULL) |
| 1477 | return NULL; |
| 1478 | for (i = 0; i < n; i++) |
| 1479 | z->ob_digit[i] = v->ob_digit[i]; |
| 1480 | z->ob_size = -(v->ob_size); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1481 | return (PyObject *)z; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1482 | } |
| 1483 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1484 | static PyObject * |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1485 | long_abs(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1486 | PyLongObject *v; |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1487 | { |
| 1488 | if (v->ob_size < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1489 | return long_neg(v); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1490 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1491 | Py_INCREF(v); |
| 1492 | return (PyObject *)v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1493 | } |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1494 | } |
| 1495 | |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 1496 | static int |
| 1497 | long_nonzero(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1498 | PyLongObject *v; |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 1499 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1500 | return ABS(v->ob_size) != 0; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1501 | } |
| 1502 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1503 | static PyObject * |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1504 | long_rshift(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1505 | PyLongObject *a; |
| 1506 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1507 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1508 | PyLongObject *z; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1509 | long shiftby; |
| 1510 | int newsize, wordshift, loshift, hishift, i, j; |
| 1511 | digit lomask, himask; |
| 1512 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1513 | if (a->ob_size < 0) { |
| 1514 | /* Right shifting negative numbers is harder */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1515 | PyLongObject *a1, *a2, *a3; |
| 1516 | a1 = (PyLongObject *) long_invert(a); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1517 | if (a1 == NULL) return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1518 | a2 = (PyLongObject *) long_rshift(a1, b); |
| 1519 | Py_DECREF(a1); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1520 | if (a2 == NULL) return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1521 | a3 = (PyLongObject *) long_invert(a2); |
| 1522 | Py_DECREF(a2); |
| 1523 | return (PyObject *) a3; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1524 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1525 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1526 | shiftby = PyLong_AsLong((PyObject *)b); |
| 1527 | if (shiftby == -1L && PyErr_Occurred()) |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1528 | return NULL; |
| 1529 | if (shiftby < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1530 | PyErr_SetString(PyExc_ValueError, "negative shift count"); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1531 | return NULL; |
| 1532 | } |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1533 | wordshift = shiftby / SHIFT; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1534 | newsize = ABS(a->ob_size) - wordshift; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1535 | if (newsize <= 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1536 | z = _PyLong_New(0); |
| 1537 | return (PyObject *)z; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1538 | } |
| 1539 | loshift = shiftby % SHIFT; |
| 1540 | hishift = SHIFT - loshift; |
| 1541 | lomask = ((digit)1 << hishift) - 1; |
| 1542 | himask = MASK ^ lomask; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1543 | z = _PyLong_New(newsize); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1544 | if (z == NULL) |
| 1545 | return NULL; |
| 1546 | if (a->ob_size < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1547 | z->ob_size = -(z->ob_size); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1548 | for (i = 0, j = wordshift; i < newsize; i++, j++) { |
| 1549 | z->ob_digit[i] = (a->ob_digit[j] >> loshift) & lomask; |
| 1550 | if (i+1 < newsize) |
| 1551 | z->ob_digit[i] |= |
| 1552 | (a->ob_digit[j+1] << hishift) & himask; |
| 1553 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1554 | return (PyObject *) long_normalize(z); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1555 | } |
| 1556 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1557 | static PyObject * |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1558 | long_lshift(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1559 | PyLongObject *a; |
| 1560 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1561 | { |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1562 | /* This version due to Tim Peters */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1563 | PyLongObject *z; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1564 | long shiftby; |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1565 | int oldsize, newsize, wordshift, remshift, i, j; |
| 1566 | twodigits accum; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1567 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1568 | shiftby = PyLong_AsLong((PyObject *)b); |
| 1569 | if (shiftby == -1L && PyErr_Occurred()) |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1570 | return NULL; |
| 1571 | if (shiftby < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1572 | PyErr_SetString(PyExc_ValueError, "negative shift count"); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1573 | return NULL; |
| 1574 | } |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1575 | if ((long)(int)shiftby != shiftby) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1576 | PyErr_SetString(PyExc_ValueError, |
| 1577 | "outrageous left shift count"); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1578 | return NULL; |
| 1579 | } |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1580 | /* wordshift, remshift = divmod(shiftby, SHIFT) */ |
| 1581 | wordshift = (int)shiftby / SHIFT; |
| 1582 | remshift = (int)shiftby - wordshift * SHIFT; |
| 1583 | |
| 1584 | oldsize = ABS(a->ob_size); |
| 1585 | newsize = oldsize + wordshift; |
| 1586 | if (remshift) |
| 1587 | ++newsize; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1588 | z = _PyLong_New(newsize); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1589 | if (z == NULL) |
| 1590 | return NULL; |
| 1591 | if (a->ob_size < 0) |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1592 | z->ob_size = -(z->ob_size); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1593 | for (i = 0; i < wordshift; i++) |
| 1594 | z->ob_digit[i] = 0; |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1595 | accum = 0; |
| 1596 | for (i = wordshift, j = 0; j < oldsize; i++, j++) { |
| 1597 | accum |= a->ob_digit[j] << remshift; |
| 1598 | z->ob_digit[i] = (digit)(accum & MASK); |
| 1599 | accum >>= SHIFT; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1600 | } |
Guido van Rossum | f2e499b | 1997-03-16 00:37:59 +0000 | [diff] [blame] | 1601 | if (remshift) |
| 1602 | z->ob_digit[newsize-1] = (digit)accum; |
| 1603 | else |
| 1604 | assert(!accum); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1605 | return (PyObject *) long_normalize(z); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1606 | } |
| 1607 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1608 | |
| 1609 | /* Bitwise and/xor/or operations */ |
| 1610 | |
Guido van Rossum | afbb8db | 1991-12-31 13:14:13 +0000 | [diff] [blame] | 1611 | #define MAX(x, y) ((x) < (y) ? (y) : (x)) |
| 1612 | #define MIN(x, y) ((x) > (y) ? (y) : (x)) |
| 1613 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1614 | static PyObject *long_bitwise Py_PROTO((PyLongObject *, int, PyLongObject *)); |
| 1615 | static PyObject * |
Guido van Rossum | e32e014 | 1992-01-19 16:31:05 +0000 | [diff] [blame] | 1616 | long_bitwise(a, op, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1617 | PyLongObject *a; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1618 | int op; /* '&', '|', '^' */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1619 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1620 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1621 | digit maska, maskb; /* 0 or MASK */ |
| 1622 | int negz; |
| 1623 | int size_a, size_b, size_z; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1624 | PyLongObject *z; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1625 | int i; |
Guido van Rossum | 8b27d92 | 1992-03-27 17:27:05 +0000 | [diff] [blame] | 1626 | digit diga, digb; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1627 | PyObject *v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1628 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1629 | if (a->ob_size < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1630 | a = (PyLongObject *) long_invert(a); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1631 | maska = MASK; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1632 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1633 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1634 | Py_INCREF(a); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1635 | maska = 0; |
Guido van Rossum | afbb8db | 1991-12-31 13:14:13 +0000 | [diff] [blame] | 1636 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1637 | if (b->ob_size < 0) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1638 | b = (PyLongObject *) long_invert(b); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1639 | maskb = MASK; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1640 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1641 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1642 | Py_INCREF(b); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1643 | maskb = 0; |
| 1644 | } |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1645 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1646 | negz = 0; |
| 1647 | switch (op) { |
| 1648 | case '^': |
| 1649 | if (maska != maskb) { |
| 1650 | maska ^= MASK; |
| 1651 | negz = -1; |
| 1652 | } |
| 1653 | break; |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1654 | case '&': |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1655 | if (maska && maskb) { |
| 1656 | op = '|'; |
| 1657 | maska ^= MASK; |
| 1658 | maskb ^= MASK; |
| 1659 | negz = -1; |
| 1660 | } |
| 1661 | break; |
| 1662 | case '|': |
| 1663 | if (maska || maskb) { |
| 1664 | op = '&'; |
| 1665 | maska ^= MASK; |
| 1666 | maskb ^= MASK; |
| 1667 | negz = -1; |
| 1668 | } |
| 1669 | break; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1670 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1671 | |
Guido van Rossum | bd3a527 | 1998-08-11 15:04:47 +0000 | [diff] [blame] | 1672 | /* JRH: The original logic here was to allocate the result value (z) |
| 1673 | as the longer of the two operands. However, there are some cases |
| 1674 | where the result is guaranteed to be shorter than that: AND of two |
| 1675 | positives, OR of two negatives: use the shorter number. AND with |
| 1676 | mixed signs: use the positive number. OR with mixed signs: use the |
| 1677 | negative number. After the transformations above, op will be '&' |
| 1678 | iff one of these cases applies, and mask will be non-0 for operands |
| 1679 | whose length should be ignored. |
| 1680 | */ |
| 1681 | |
| 1682 | size_a = a->ob_size; |
| 1683 | size_b = b->ob_size; |
| 1684 | size_z = op == '&' |
| 1685 | ? (maska |
| 1686 | ? size_b |
| 1687 | : (maskb ? size_a : MIN(size_a, size_b))) |
| 1688 | : MAX(size_a, size_b); |
| 1689 | z = _PyLong_New(size_z); |
| 1690 | if (a == NULL || b == NULL || z == NULL) { |
| 1691 | Py_XDECREF(a); |
| 1692 | Py_XDECREF(b); |
| 1693 | Py_XDECREF(z); |
| 1694 | return NULL; |
| 1695 | } |
| 1696 | |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1697 | for (i = 0; i < size_z; ++i) { |
| 1698 | diga = (i < size_a ? a->ob_digit[i] : 0) ^ maska; |
| 1699 | digb = (i < size_b ? b->ob_digit[i] : 0) ^ maskb; |
| 1700 | switch (op) { |
| 1701 | case '&': z->ob_digit[i] = diga & digb; break; |
| 1702 | case '|': z->ob_digit[i] = diga | digb; break; |
| 1703 | case '^': z->ob_digit[i] = diga ^ digb; break; |
| 1704 | } |
Guido van Rossum | afbb8db | 1991-12-31 13:14:13 +0000 | [diff] [blame] | 1705 | } |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1706 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1707 | Py_DECREF(a); |
| 1708 | Py_DECREF(b); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1709 | z = long_normalize(z); |
| 1710 | if (negz == 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1711 | return (PyObject *) z; |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1712 | v = long_invert(z); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1713 | Py_DECREF(z); |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1714 | return v; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1715 | } |
| 1716 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1717 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1718 | long_and(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1719 | PyLongObject *a; |
| 1720 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1721 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1722 | return long_bitwise(a, '&', b); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1723 | } |
| 1724 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1725 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1726 | long_xor(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1727 | PyLongObject *a; |
| 1728 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1729 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1730 | return long_bitwise(a, '^', b); |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1731 | } |
| 1732 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1733 | static PyObject * |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1734 | long_or(a, b) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1735 | PyLongObject *a; |
| 1736 | PyLongObject *b; |
Guido van Rossum | c6913e7 | 1991-11-19 20:26:46 +0000 | [diff] [blame] | 1737 | { |
Guido van Rossum | 4c260ff | 1992-01-14 18:36:43 +0000 | [diff] [blame] | 1738 | return long_bitwise(a, '|', b); |
Guido van Rossum | 23d6f0e | 1991-05-14 12:06:49 +0000 | [diff] [blame] | 1739 | } |
| 1740 | |
Guido van Rossum | 234f942 | 1993-06-17 12:35:49 +0000 | [diff] [blame] | 1741 | static int |
Guido van Rossum | e6eefc2 | 1992-08-14 12:06:52 +0000 | [diff] [blame] | 1742 | long_coerce(pv, pw) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1743 | PyObject **pv; |
| 1744 | PyObject **pw; |
Guido van Rossum | e6eefc2 | 1992-08-14 12:06:52 +0000 | [diff] [blame] | 1745 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1746 | if (PyInt_Check(*pw)) { |
| 1747 | *pw = PyLong_FromLong(PyInt_AsLong(*pw)); |
| 1748 | Py_INCREF(*pv); |
Guido van Rossum | e6eefc2 | 1992-08-14 12:06:52 +0000 | [diff] [blame] | 1749 | return 0; |
| 1750 | } |
| 1751 | return 1; /* Can't do it */ |
| 1752 | } |
| 1753 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1754 | static PyObject * |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1755 | long_int(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1756 | PyObject *v; |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1757 | { |
| 1758 | long x; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1759 | x = PyLong_AsLong(v); |
| 1760 | if (PyErr_Occurred()) |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1761 | return NULL; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1762 | return PyInt_FromLong(x); |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1763 | } |
| 1764 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1765 | static PyObject * |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1766 | long_long(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1767 | PyObject *v; |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1768 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1769 | Py_INCREF(v); |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1770 | return v; |
| 1771 | } |
| 1772 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1773 | static PyObject * |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1774 | long_float(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1775 | PyObject *v; |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1776 | { |
Guido van Rossum | 09e6ad0 | 1997-02-14 22:54:21 +0000 | [diff] [blame] | 1777 | double result; |
| 1778 | PyFPE_START_PROTECT("long_float", return 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1779 | result = PyLong_AsDouble(v); |
Guido van Rossum | 45b8391 | 1997-03-14 04:32:50 +0000 | [diff] [blame] | 1780 | PyFPE_END_PROTECT(result) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1781 | return PyFloat_FromDouble(result); |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1782 | } |
| 1783 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1784 | static PyObject * |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1785 | long_oct(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1786 | PyObject *v; |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1787 | { |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 1788 | return long_format(v, 8, 1); |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1789 | } |
| 1790 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1791 | static PyObject * |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1792 | long_hex(v) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1793 | PyObject *v; |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1794 | { |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 1795 | return long_format(v, 16, 1); |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1796 | } |
| 1797 | |
| 1798 | |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1799 | #define UF (unaryfunc) |
| 1800 | #define BF (binaryfunc) |
| 1801 | #define TF (ternaryfunc) |
| 1802 | #define IF (inquiry) |
Guido van Rossum | 8b27d92 | 1992-03-27 17:27:05 +0000 | [diff] [blame] | 1803 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1804 | static PyNumberMethods long_as_number = { |
Guido van Rossum | 8b27d92 | 1992-03-27 17:27:05 +0000 | [diff] [blame] | 1805 | BF long_add, /*nb_add*/ |
| 1806 | BF long_sub, /*nb_subtract*/ |
| 1807 | BF long_mul, /*nb_multiply*/ |
| 1808 | BF long_div, /*nb_divide*/ |
| 1809 | BF long_mod, /*nb_remainder*/ |
| 1810 | BF long_divmod, /*nb_divmod*/ |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1811 | TF long_pow, /*nb_power*/ |
Guido van Rossum | 8b27d92 | 1992-03-27 17:27:05 +0000 | [diff] [blame] | 1812 | UF long_neg, /*nb_negative*/ |
| 1813 | UF long_pos, /*tp_positive*/ |
| 1814 | UF long_abs, /*tp_absolute*/ |
| 1815 | IF long_nonzero,/*tp_nonzero*/ |
| 1816 | UF long_invert, /*nb_invert*/ |
| 1817 | BF long_lshift, /*nb_lshift*/ |
| 1818 | BF long_rshift, /*nb_rshift*/ |
| 1819 | BF long_and, /*nb_and*/ |
| 1820 | BF long_xor, /*nb_xor*/ |
| 1821 | BF long_or, /*nb_or*/ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1822 | (int (*) Py_FPROTO((PyObject **, PyObject **))) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1823 | (coercion)long_coerce, /*nb_coerce*/ |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1824 | UF long_int, /*nb_int*/ |
| 1825 | UF long_long, /*nb_long*/ |
| 1826 | UF long_float, /*nb_float*/ |
| 1827 | UF long_oct, /*nb_oct*/ |
| 1828 | UF long_hex, /*nb_hex*/ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1829 | }; |
| 1830 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1831 | PyTypeObject PyLong_Type = { |
| 1832 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1833 | 0, |
| 1834 | "long int", |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1835 | sizeof(PyLongObject) - sizeof(digit), |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1836 | sizeof(digit), |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1837 | (destructor)long_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1838 | 0, /*tp_print*/ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1839 | 0, /*tp_getattr*/ |
| 1840 | 0, /*tp_setattr*/ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1841 | (int (*) Py_FPROTO((PyObject *, PyObject *))) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1842 | (cmpfunc)long_compare, /*tp_compare*/ |
| 1843 | (reprfunc)long_repr, /*tp_repr*/ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1844 | &long_as_number,/*tp_as_number*/ |
| 1845 | 0, /*tp_as_sequence*/ |
| 1846 | 0, /*tp_as_mapping*/ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1847 | (long (*) Py_FPROTO((PyObject *))) |
Guido van Rossum | eb1fafc | 1994-08-29 12:47:19 +0000 | [diff] [blame] | 1848 | (hashfunc)long_hash, /*tp_hash*/ |
Fred Drake | 121ee27 | 1999-12-23 15:41:28 +0000 | [diff] [blame] | 1849 | 0, /*tp_call*/ |
| 1850 | (reprfunc)long_str, /*tp_str*/ |
Guido van Rossum | edcc38a | 1991-05-05 20:09:44 +0000 | [diff] [blame] | 1851 | }; |