Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 1 | |
| 2 | /* Range object implementation */ |
| 3 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 4 | #include "Python.h" |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 5 | #include "structmember.h" |
| 6 | #include <string.h> |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 7 | |
| 8 | typedef struct { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 9 | PyObject_HEAD |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 10 | long start; |
| 11 | long step; |
| 12 | long len; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 13 | int reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 14 | } rangeobject; |
| 15 | |
| 16 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 17 | PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 18 | PyRange_New(long start, long len, long step, int reps) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 19 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 20 | rangeobject *obj = PyObject_NEW(rangeobject, &PyRange_Type); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 21 | |
| 22 | obj->start = start; |
| 23 | obj->len = len; |
| 24 | obj->step = step; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 25 | obj->reps = 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 | return (PyObject *) obj; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 28 | } |
| 29 | |
| 30 | static void |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 31 | range_dealloc(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 32 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 33 | PyObject_DEL(r); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 34 | } |
| 35 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 36 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 37 | range_item(rangeobject *r, int i) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 38 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 39 | if (i < 0 || i >= r->len * r->reps) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 40 | PyErr_SetString(PyExc_IndexError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 41 | "xrange object index out of range"); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 42 | return NULL; |
| 43 | } |
| 44 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 45 | return PyInt_FromLong(r->start + (i % r->len) * r->step); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 49 | range_length(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 50 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 51 | return r->len * r->reps; |
| 52 | } |
| 53 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 54 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 55 | range_repr(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 56 | { |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 57 | /* buffers must be big enough to hold 3 longs + an int + |
| 58 | * a bit of "(xrange(...) * ...)" text. |
| 59 | */ |
| 60 | char buf1[250]; |
| 61 | char buf2[250]; |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 62 | |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 63 | if (r->start == 0 && r->step == 1) |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 64 | sprintf(buf1, "xrange(%ld)", r->start + r->len * r->step); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 65 | |
| 66 | else if (r->step == 1) |
| 67 | sprintf(buf1, "xrange(%ld, %ld)", |
| 68 | r->start, |
| 69 | r->start + r->len * r->step); |
| 70 | |
| 71 | else |
| 72 | sprintf(buf1, "xrange(%ld, %ld, %ld)", |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 73 | r->start, |
| 74 | r->start + r->len * r->step, |
| 75 | r->step); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 76 | |
| 77 | if (r->reps != 1) |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 78 | sprintf(buf2, "(%s * %d)", buf1, r->reps); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 79 | |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 80 | return PyString_FromString(r->reps == 1 ? buf1 : buf2); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 81 | } |
| 82 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 83 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 84 | range_concat(rangeobject *r, PyObject *obj) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 85 | { |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 86 | PyErr_SetString(PyExc_TypeError, "cannot concatenate xrange objects"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 87 | return NULL; |
| 88 | } |
| 89 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 90 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 91 | range_repeat(rangeobject *r, int n) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 92 | { |
| 93 | if (n < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 94 | return (PyObject *) PyRange_New(0, 0, 1, 1); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 95 | |
| 96 | else if (n == 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 97 | Py_INCREF(r); |
| 98 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 102 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 103 | r->start, |
| 104 | r->len, |
| 105 | r->step, |
| 106 | r->reps * n); |
| 107 | } |
| 108 | |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 109 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 110 | range_compare(rangeobject *r1, rangeobject *r2) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 111 | { |
| 112 | if (r1->start != r2->start) |
| 113 | return r1->start - r2->start; |
| 114 | |
| 115 | else if (r1->step != r2->step) |
| 116 | return r1->step - r2->step; |
| 117 | |
| 118 | else if (r1->len != r2->len) |
| 119 | return r1->len - r2->len; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 120 | |
| 121 | else |
| 122 | return r1->reps - r2->reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 123 | } |
| 124 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 125 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 126 | range_slice(rangeobject *r, int low, int high) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 127 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 128 | if (r->reps != 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 129 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 130 | "cannot slice a replicated xrange"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 131 | return NULL; |
| 132 | } |
| 133 | if (low < 0) |
| 134 | low = 0; |
| 135 | else if (low > r->len) |
| 136 | low = r->len; |
| 137 | if (high < 0) |
| 138 | high = 0; |
| 139 | if (high < low) |
| 140 | high = low; |
| 141 | else if (high > r->len) |
| 142 | high = r->len; |
| 143 | |
| 144 | if (low == 0 && high == r->len) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 145 | Py_INCREF(r); |
| 146 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 147 | } |
| 148 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 149 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 150 | low * r->step + r->start, |
| 151 | high - low, |
| 152 | r->step, |
| 153 | 1); |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 154 | } |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 155 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 156 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 157 | range_tolist(rangeobject *self, PyObject *args) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 158 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 159 | PyObject *thelist; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 160 | int j; |
| 161 | int len = self->len * self->reps; |
| 162 | |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 163 | if (! PyArg_ParseTuple(args, ":tolist")) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 164 | return NULL; |
| 165 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 166 | if ((thelist = PyList_New(len)) == NULL) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 167 | return NULL; |
| 168 | |
| 169 | for (j = 0; j < len; ++j) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 170 | if ((PyList_SetItem(thelist, j, (PyObject *) PyInt_FromLong( |
| 171 | self->start + (j % self->len) * self->step))) < 0) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 172 | return NULL; |
| 173 | |
| 174 | return thelist; |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 175 | } |
| 176 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 177 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 178 | range_getattr(rangeobject *r, char *name) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 179 | { |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 180 | PyObject *result; |
| 181 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 182 | static PyMethodDef range_methods[] = { |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 183 | {"tolist", (PyCFunction)range_tolist, METH_VARARGS, |
| 184 | "tolist() -> list\n" |
| 185 | "Return a list object with the same values."}, |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 186 | {NULL, NULL} |
| 187 | }; |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 188 | static struct memberlist range_members[] = { |
| 189 | {"step", T_LONG, offsetof(rangeobject, step), RO}, |
| 190 | {"start", T_LONG, offsetof(rangeobject, start), RO}, |
| 191 | {"stop", T_LONG, 0, RO}, |
| 192 | {NULL, 0, 0, 0} |
| 193 | }; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 194 | |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 195 | result = Py_FindMethod(range_methods, (PyObject *) r, name); |
| 196 | if (result == NULL) { |
| 197 | PyErr_Clear(); |
| 198 | if (strcmp("stop", name) == 0) |
| 199 | result = PyInt_FromLong(r->start + (r->len * r->step)); |
| 200 | else |
| 201 | result = PyMember_Get((char *)r, range_members, name); |
| 202 | } |
| 203 | return result; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 204 | } |
| 205 | |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 206 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 207 | range_contains(rangeobject *r, PyObject *obj) |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 208 | { |
| 209 | long num = PyInt_AsLong(obj); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 210 | |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 211 | if (num < 0 && PyErr_Occurred()) |
| 212 | return -1; |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 213 | |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 214 | if (r->step > 0) { |
| 215 | if ((num < r->start) || ((num - r->start) % r->step)) |
| 216 | return 0; |
| 217 | if (num >= (r->start + (r->len * r->step))) |
| 218 | return 0; |
| 219 | } |
| 220 | else { |
| 221 | if ((num > r->start) || ((num - r->start) % r->step)) |
| 222 | return 0; |
| 223 | if (num <= (r->start + (r->len * r->step))) |
| 224 | return 0; |
| 225 | } |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 226 | return 1; |
| 227 | } |
| 228 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 229 | static PySequenceMethods range_as_sequence = { |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 230 | (inquiry)range_length, /*sq_length*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 231 | (binaryfunc)range_concat, /*sq_concat*/ |
| 232 | (intargfunc)range_repeat, /*sq_repeat*/ |
| 233 | (intargfunc)range_item, /*sq_item*/ |
| 234 | (intintargfunc)range_slice, /*sq_slice*/ |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame^] | 235 | 0, /*sq_ass_item*/ |
| 236 | 0, /*sq_ass_slice*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 237 | (objobjproc)range_contains, /*sq_contains*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 238 | }; |
| 239 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 240 | PyTypeObject PyRange_Type = { |
| 241 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 242 | 0, /* Number of items for varobject */ |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 243 | "xrange", /* Name of this type */ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 244 | sizeof(rangeobject), /* Basic object size */ |
| 245 | 0, /* Item size for varobject */ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 246 | (destructor)range_dealloc, /*tp_dealloc*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 247 | 0, /*tp_print*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 248 | (getattrfunc)range_getattr, /*tp_getattr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 249 | 0, /*tp_setattr*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 250 | (cmpfunc)range_compare, /*tp_compare*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 251 | (reprfunc)range_repr, /*tp_repr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 252 | 0, /*tp_as_number*/ |
| 253 | &range_as_sequence, /*tp_as_sequence*/ |
| 254 | 0, /*tp_as_mapping*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 255 | 0, /*tp_hash*/ |
| 256 | 0, /*tp_call*/ |
| 257 | 0, /*tp_str*/ |
| 258 | 0, /*tp_getattro*/ |
| 259 | 0, /*tp_setattro*/ |
| 260 | 0, /*tp_as_buffer*/ |
| 261 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 262 | }; |