Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
| 11 | /* Range object implementation */ |
| 12 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 13 | #include "Python.h" |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 14 | |
| 15 | typedef struct { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 16 | PyObject_HEAD |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 17 | long start; |
| 18 | long step; |
| 19 | long len; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 20 | int reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 21 | } rangeobject; |
| 22 | |
| 23 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 24 | PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 25 | PyRange_New(long start, long len, long step, int reps) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 26 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 27 | rangeobject *obj = PyObject_NEW(rangeobject, &PyRange_Type); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 28 | |
| 29 | obj->start = start; |
| 30 | obj->len = len; |
| 31 | obj->step = step; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 32 | obj->reps = reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 33 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 34 | return (PyObject *) obj; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | static void |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 38 | range_dealloc(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 39 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 40 | PyObject_DEL(r); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 41 | } |
| 42 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 43 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 44 | range_item(rangeobject *r, int i) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 45 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 46 | if (i < 0 || i >= r->len * r->reps) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 47 | PyErr_SetString(PyExc_IndexError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 48 | "xrange object index out of range"); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 49 | return NULL; |
| 50 | } |
| 51 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 52 | return PyInt_FromLong(r->start + (i % r->len) * r->step); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 56 | range_length(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 57 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 58 | return r->len * r->reps; |
| 59 | } |
| 60 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 61 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 62 | range_repr(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 63 | { |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame^] | 64 | char buf1[80]; |
| 65 | char buf2[80]; |
| 66 | |
| 67 | if (r->start == 0 && r->step == 1) { |
| 68 | snprintf(buf1, sizeof(buf1), "xrange(%ld)", |
| 69 | r->start + r->len * r->step); |
| 70 | } |
| 71 | else { |
| 72 | char *fmt = "xrange(%ld, %ld, %ld)"; |
| 73 | if (r->step == 1) |
| 74 | fmt = "xrange(%ld, %ld)"; |
| 75 | snprintf(buf1, sizeof(buf1), fmt, |
| 76 | r->start, |
| 77 | r->start + r->len * r->step, |
| 78 | r->step); |
| 79 | } |
| 80 | if (r->reps != 1) { |
| 81 | snprintf(buf2, sizeof(buf2), |
| 82 | "(%s * %d)", buf1, r->reps); |
| 83 | } |
| 84 | return PyString_FromString(r->reps == 1 ? buf1 : buf2); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 85 | } |
| 86 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 87 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 88 | range_concat(rangeobject *r, PyObject *obj) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 89 | { |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 90 | PyErr_SetString(PyExc_TypeError, "cannot concatenate xrange objects"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 91 | return NULL; |
| 92 | } |
| 93 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 94 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 95 | range_repeat(rangeobject *r, int n) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 96 | { |
| 97 | if (n < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 98 | return (PyObject *) PyRange_New(0, 0, 1, 1); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 99 | |
| 100 | else if (n == 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 101 | Py_INCREF(r); |
| 102 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 106 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 107 | r->start, |
| 108 | r->len, |
| 109 | r->step, |
| 110 | r->reps * n); |
| 111 | } |
| 112 | |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 113 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 114 | range_compare(rangeobject *r1, rangeobject *r2) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 115 | { |
| 116 | if (r1->start != r2->start) |
| 117 | return r1->start - r2->start; |
| 118 | |
| 119 | else if (r1->step != r2->step) |
| 120 | return r1->step - r2->step; |
| 121 | |
| 122 | else if (r1->len != r2->len) |
| 123 | return r1->len - r2->len; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 124 | |
| 125 | else |
| 126 | return r1->reps - r2->reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 127 | } |
| 128 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 129 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 130 | range_slice(rangeobject *r, int low, int high) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 131 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 132 | if (r->reps != 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 133 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 134 | "cannot slice a replicated xrange"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 135 | return NULL; |
| 136 | } |
| 137 | if (low < 0) |
| 138 | low = 0; |
| 139 | else if (low > r->len) |
| 140 | low = r->len; |
| 141 | if (high < 0) |
| 142 | high = 0; |
| 143 | if (high < low) |
| 144 | high = low; |
| 145 | else if (high > r->len) |
| 146 | high = r->len; |
| 147 | |
| 148 | if (low == 0 && high == r->len) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 149 | Py_INCREF(r); |
| 150 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 151 | } |
| 152 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 153 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 154 | low * r->step + r->start, |
| 155 | high - low, |
| 156 | r->step, |
| 157 | 1); |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 158 | } |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 159 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 160 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 161 | range_tolist(rangeobject *self, PyObject *args) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 162 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 163 | PyObject *thelist; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 164 | int j; |
| 165 | int len = self->len * self->reps; |
| 166 | |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame^] | 167 | if (! PyArg_ParseTuple(args, ":tolist")) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 168 | return NULL; |
| 169 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 170 | if ((thelist = PyList_New(len)) == NULL) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 171 | return NULL; |
| 172 | |
| 173 | for (j = 0; j < len; ++j) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 174 | if ((PyList_SetItem(thelist, j, (PyObject *) PyInt_FromLong( |
| 175 | self->start + (j % self->len) * self->step))) < 0) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 176 | return NULL; |
| 177 | |
| 178 | return thelist; |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 179 | } |
| 180 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 181 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 182 | range_getattr(rangeobject *r, char *name) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 183 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 184 | static PyMethodDef range_methods[] = { |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame^] | 185 | {"tolist", (PyCFunction)range_tolist, METH_VARARGS, |
| 186 | "tolist() -> list\n" |
| 187 | "Return a list object with the same values."}, |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 188 | {NULL, NULL} |
| 189 | }; |
| 190 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 191 | return Py_FindMethod(range_methods, (PyObject *) r, name); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 194 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 195 | range_contains(rangeobject *r, PyObject *obj) |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 196 | { |
| 197 | long num = PyInt_AsLong(obj); |
| 198 | |
| 199 | if (num < 0 && PyErr_Occurred()) |
| 200 | return -1; |
| 201 | |
| 202 | if (num < r->start || (num - r->start) % r->step) |
| 203 | return 0; |
| 204 | if (num > (r->start + (r->len * r->step))) |
| 205 | return 0; |
| 206 | return 1; |
| 207 | } |
| 208 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 209 | static PySequenceMethods range_as_sequence = { |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 210 | (inquiry)range_length, /*sq_length*/ |
| 211 | (binaryfunc)range_concat, /*sq_concat*/ |
| 212 | (intargfunc)range_repeat, /*sq_repeat*/ |
| 213 | (intargfunc)range_item, /*sq_item*/ |
| 214 | (intintargfunc)range_slice, /*sq_slice*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 215 | 0, /*sq_ass_item*/ |
| 216 | 0, /*sq_ass_slice*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 217 | (objobjproc)range_contains, /*sq_contains*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 218 | }; |
| 219 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 220 | PyTypeObject PyRange_Type = { |
| 221 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 222 | 0, /* Number of items for varobject */ |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 223 | "xrange", /* Name of this type */ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 224 | sizeof(rangeobject), /* Basic object size */ |
| 225 | 0, /* Item size for varobject */ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 226 | (destructor)range_dealloc, /*tp_dealloc*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame^] | 227 | 0, /*tp_print*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 228 | (getattrfunc)range_getattr, /*tp_getattr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 229 | 0, /*tp_setattr*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 230 | (cmpfunc)range_compare, /*tp_compare*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame^] | 231 | (reprfunc)range_repr, /*tp_repr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 232 | 0, /*tp_as_number*/ |
| 233 | &range_as_sequence, /*tp_as_sequence*/ |
| 234 | 0, /*tp_as_mapping*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 235 | 0, /*tp_hash*/ |
| 236 | 0, /*tp_call*/ |
| 237 | 0, /*tp_str*/ |
| 238 | 0, /*tp_getattro*/ |
| 239 | 0, /*tp_setattro*/ |
| 240 | 0, /*tp_as_buffer*/ |
| 241 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 242 | }; |