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 | |
Guido van Rossum | 9e8f4ea | 2000-12-14 14:59:53 +0000 | [diff] [blame] | 22 | if (obj == NULL) |
| 23 | return NULL; |
| 24 | |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 25 | obj->start = start; |
| 26 | obj->len = len; |
| 27 | obj->step = step; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 28 | obj->reps = reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 29 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 30 | return (PyObject *) obj; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | static void |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 34 | range_dealloc(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 35 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 36 | PyObject_DEL(r); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 37 | } |
| 38 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 39 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 40 | range_item(rangeobject *r, int i) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 41 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 42 | if (i < 0 || i >= r->len * r->reps) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 43 | PyErr_SetString(PyExc_IndexError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 44 | "xrange object index out of range"); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 45 | return NULL; |
| 46 | } |
| 47 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 48 | return PyInt_FromLong(r->start + (i % r->len) * r->step); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 52 | range_length(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 53 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 54 | return r->len * r->reps; |
| 55 | } |
| 56 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 57 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 58 | range_repr(rangeobject *r) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 59 | { |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 60 | /* buffers must be big enough to hold 3 longs + an int + |
| 61 | * a bit of "(xrange(...) * ...)" text. |
| 62 | */ |
| 63 | char buf1[250]; |
| 64 | char buf2[250]; |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 65 | |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 66 | if (r->start == 0 && r->step == 1) |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 67 | sprintf(buf1, "xrange(%ld)", r->start + r->len * r->step); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 68 | |
| 69 | else if (r->step == 1) |
| 70 | sprintf(buf1, "xrange(%ld, %ld)", |
| 71 | r->start, |
| 72 | r->start + r->len * r->step); |
| 73 | |
| 74 | else |
| 75 | sprintf(buf1, "xrange(%ld, %ld, %ld)", |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 76 | r->start, |
| 77 | r->start + r->len * r->step, |
| 78 | r->step); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 79 | |
| 80 | if (r->reps != 1) |
Fred Drake | c76e0e5 | 2000-08-04 02:34:41 +0000 | [diff] [blame] | 81 | sprintf(buf2, "(%s * %d)", buf1, r->reps); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 82 | |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 83 | return PyString_FromString(r->reps == 1 ? buf1 : buf2); |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 84 | } |
| 85 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 86 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 87 | range_concat(rangeobject *r, PyObject *obj) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 88 | { |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 89 | PyErr_SetString(PyExc_TypeError, "cannot concatenate xrange objects"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 90 | return NULL; |
| 91 | } |
| 92 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 93 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 94 | range_repeat(rangeobject *r, int n) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 95 | { |
| 96 | if (n < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 97 | return (PyObject *) PyRange_New(0, 0, 1, 1); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 98 | |
| 99 | else if (n == 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 100 | Py_INCREF(r); |
| 101 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 105 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 106 | r->start, |
| 107 | r->len, |
| 108 | r->step, |
| 109 | r->reps * n); |
| 110 | } |
| 111 | |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 112 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 113 | range_compare(rangeobject *r1, rangeobject *r2) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 114 | { |
| 115 | if (r1->start != r2->start) |
| 116 | return r1->start - r2->start; |
| 117 | |
| 118 | else if (r1->step != r2->step) |
| 119 | return r1->step - r2->step; |
| 120 | |
| 121 | else if (r1->len != r2->len) |
| 122 | return r1->len - r2->len; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 123 | |
| 124 | else |
| 125 | return r1->reps - r2->reps; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 126 | } |
| 127 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 128 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 129 | range_slice(rangeobject *r, int low, int high) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 130 | { |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 131 | if (r->reps != 1) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 132 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 5dadf7e | 1999-01-09 21:40:35 +0000 | [diff] [blame] | 133 | "cannot slice a replicated xrange"); |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 134 | return NULL; |
| 135 | } |
| 136 | if (low < 0) |
| 137 | low = 0; |
| 138 | else if (low > r->len) |
| 139 | low = r->len; |
| 140 | if (high < 0) |
| 141 | high = 0; |
| 142 | if (high < low) |
| 143 | high = low; |
| 144 | else if (high > r->len) |
| 145 | high = r->len; |
| 146 | |
| 147 | if (low == 0 && high == r->len) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 148 | Py_INCREF(r); |
| 149 | return (PyObject *) r; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 150 | } |
| 151 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 152 | return (PyObject *) PyRange_New( |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 153 | low * r->step + r->start, |
| 154 | high - low, |
| 155 | r->step, |
| 156 | 1); |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 157 | } |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 158 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 159 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 160 | range_tolist(rangeobject *self, PyObject *args) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 161 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 162 | PyObject *thelist; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 163 | int j; |
| 164 | int len = self->len * self->reps; |
| 165 | |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 166 | if (! PyArg_ParseTuple(args, ":tolist")) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 167 | return NULL; |
| 168 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 169 | if ((thelist = PyList_New(len)) == NULL) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 170 | return NULL; |
| 171 | |
| 172 | for (j = 0; j < len; ++j) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 173 | if ((PyList_SetItem(thelist, j, (PyObject *) PyInt_FromLong( |
| 174 | self->start + (j % self->len) * self->step))) < 0) |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 175 | return NULL; |
| 176 | |
| 177 | return thelist; |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 178 | } |
| 179 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 180 | static PyObject * |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 181 | range_getattr(rangeobject *r, char *name) |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 182 | { |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 183 | PyObject *result; |
| 184 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 185 | static PyMethodDef range_methods[] = { |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 186 | {"tolist", (PyCFunction)range_tolist, METH_VARARGS, |
| 187 | "tolist() -> list\n" |
| 188 | "Return a list object with the same values."}, |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 189 | {NULL, NULL} |
| 190 | }; |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 191 | static struct memberlist range_members[] = { |
| 192 | {"step", T_LONG, offsetof(rangeobject, step), RO}, |
| 193 | {"start", T_LONG, offsetof(rangeobject, start), RO}, |
| 194 | {"stop", T_LONG, 0, RO}, |
| 195 | {NULL, 0, 0, 0} |
| 196 | }; |
Guido van Rossum | 7d6aa51 | 1993-12-21 22:50:31 +0000 | [diff] [blame] | 197 | |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 198 | result = Py_FindMethod(range_methods, (PyObject *) r, name); |
| 199 | if (result == NULL) { |
| 200 | PyErr_Clear(); |
| 201 | if (strcmp("stop", name) == 0) |
| 202 | result = PyInt_FromLong(r->start + (r->len * r->step)); |
| 203 | else |
| 204 | result = PyMember_Get((char *)r, range_members, name); |
| 205 | } |
| 206 | return result; |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 207 | } |
| 208 | |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 209 | static int |
Fred Drake | 45cfbcc | 2000-07-09 06:21:27 +0000 | [diff] [blame] | 210 | range_contains(rangeobject *r, PyObject *obj) |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 211 | { |
| 212 | long num = PyInt_AsLong(obj); |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 213 | |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 214 | if (num < 0 && PyErr_Occurred()) |
| 215 | return -1; |
Tim Peters | 72d421b | 2000-08-04 03:05:40 +0000 | [diff] [blame] | 216 | |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 217 | if (r->step > 0) { |
| 218 | if ((num < r->start) || ((num - r->start) % r->step)) |
| 219 | return 0; |
| 220 | if (num >= (r->start + (r->len * r->step))) |
| 221 | return 0; |
| 222 | } |
| 223 | else { |
| 224 | if ((num > r->start) || ((num - r->start) % r->step)) |
| 225 | return 0; |
| 226 | if (num <= (r->start + (r->len * r->step))) |
| 227 | return 0; |
| 228 | } |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 229 | return 1; |
| 230 | } |
| 231 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 232 | static PySequenceMethods range_as_sequence = { |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 233 | (inquiry)range_length, /*sq_length*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 234 | (binaryfunc)range_concat, /*sq_concat*/ |
| 235 | (intargfunc)range_repeat, /*sq_repeat*/ |
| 236 | (intargfunc)range_item, /*sq_item*/ |
| 237 | (intintargfunc)range_slice, /*sq_slice*/ |
Fred Drake | 0b796fa | 2000-11-08 19:42:43 +0000 | [diff] [blame] | 238 | 0, /*sq_ass_item*/ |
| 239 | 0, /*sq_ass_slice*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 240 | (objobjproc)range_contains, /*sq_contains*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 241 | }; |
| 242 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 243 | PyTypeObject PyRange_Type = { |
| 244 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 245 | 0, /* Number of items for varobject */ |
Guido van Rossum | 2586bf0 | 1993-11-01 16:21:44 +0000 | [diff] [blame] | 246 | "xrange", /* Name of this type */ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 247 | sizeof(rangeobject), /* Basic object size */ |
| 248 | 0, /* Item size for varobject */ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 249 | (destructor)range_dealloc, /*tp_dealloc*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 250 | 0, /*tp_print*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 251 | (getattrfunc)range_getattr, /*tp_getattr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 252 | 0, /*tp_setattr*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 253 | (cmpfunc)range_compare, /*tp_compare*/ |
Fred Drake | 2b83b46 | 2000-08-03 17:43:02 +0000 | [diff] [blame] | 254 | (reprfunc)range_repr, /*tp_repr*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 255 | 0, /*tp_as_number*/ |
| 256 | &range_as_sequence, /*tp_as_sequence*/ |
| 257 | 0, /*tp_as_mapping*/ |
Fred Drake | 5678025 | 2000-06-15 14:50:20 +0000 | [diff] [blame] | 258 | 0, /*tp_hash*/ |
| 259 | 0, /*tp_call*/ |
| 260 | 0, /*tp_str*/ |
| 261 | 0, /*tp_getattro*/ |
| 262 | 0, /*tp_setattro*/ |
| 263 | 0, /*tp_as_buffer*/ |
| 264 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
Guido van Rossum | 12d12c5 | 1993-10-26 17:58:25 +0000 | [diff] [blame] | 265 | }; |