Mercurial > cpython-lru_cache-weakref
annotate Objects/tupleobject.c @ 1590:ac2e5cc29949 legacy-trunk
Added tests for missing host to open_http and open_gopher
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 18 Apr 1994 09:39:56 +0000 |
| parents | 90c5e2bb4da5 |
| children | b724599401ff |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum, |
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3 Amsterdam, The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 6 | 25 /* Tuple object implementation */ |
| 26 | |
| 86 | 27 #include "allobjects.h" |
| 6 | 28 |
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29 #ifndef MAXSAVESIZE |
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30 #define MAXSAVESIZE 20 |
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31 #endif |
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32 |
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33 #if MAXSAVESIZE > 0 |
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34 /* Entries 1 upto MAXSAVESIZE are free lists, entry 0 is the empty |
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35 tuple () of which at most one instance will be allocated. |
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36 */ |
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37 static tupleobject *free_tuples[MAXSAVESIZE]; |
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38 #endif |
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39 #ifdef COUNT_ALLOCS |
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40 int fast_tuple_allocs; |
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41 int tuple_zero_allocs; |
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42 #endif |
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43 |
| 6 | 44 object * |
| 45 newtupleobject(size) | |
| 46 register int size; | |
| 47 { | |
| 48 register int i; | |
| 49 register tupleobject *op; | |
| 50 if (size < 0) { | |
| 27 | 51 err_badcall(); |
| 6 | 52 return NULL; |
| 53 } | |
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54 #if MAXSAVESIZE > 0 |
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55 if (size == 0 && free_tuples[0]) { |
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56 op = free_tuples[0]; |
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57 INCREF(op); |
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58 #ifdef COUNT_ALLOCS |
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59 tuple_zero_allocs++; |
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60 #endif |
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61 return (object *) op; |
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62 } |
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63 if (0 < size && size < MAXSAVESIZE && (op = free_tuples[size]) != NULL) { |
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64 free_tuples[size] = (tupleobject *) op->ob_item[0]; |
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65 #ifdef COUNT_ALLOCS |
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66 fast_tuple_allocs++; |
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67 #endif |
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68 } else |
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69 #endif |
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70 { |
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71 op = (tupleobject *) |
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72 malloc(sizeof(tupleobject) + size * sizeof(object *)); |
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73 if (op == NULL) |
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74 return err_nomem(); |
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75 } |
| 6 | 76 op->ob_type = &Tupletype; |
| 77 op->ob_size = size; | |
| 78 for (i = 0; i < size; i++) | |
| 79 op->ob_item[i] = NULL; | |
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80 NEWREF(op); |
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81 #if MAXSAVESIZE > 0 |
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82 if (size == 0) { |
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83 free_tuples[0] = op; |
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84 INCREF(op); /* extra INCREF so that this is never freed */ |
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85 } |
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86 #endif |
| 6 | 87 return (object *) op; |
| 88 } | |
| 89 | |
| 90 int | |
| 91 gettuplesize(op) | |
| 92 register object *op; | |
| 93 { | |
| 94 if (!is_tupleobject(op)) { | |
| 27 | 95 err_badcall(); |
| 6 | 96 return -1; |
| 97 } | |
| 98 else | |
| 99 return ((tupleobject *)op)->ob_size; | |
| 100 } | |
| 101 | |
| 102 object * | |
| 103 gettupleitem(op, i) | |
| 104 register object *op; | |
| 105 register int i; | |
| 106 { | |
| 107 if (!is_tupleobject(op)) { | |
| 27 | 108 err_badcall(); |
| 6 | 109 return NULL; |
| 110 } | |
| 111 if (i < 0 || i >= ((tupleobject *)op) -> ob_size) { | |
| 27 | 112 err_setstr(IndexError, "tuple index out of range"); |
| 6 | 113 return NULL; |
| 114 } | |
| 115 return ((tupleobject *)op) -> ob_item[i]; | |
| 116 } | |
| 117 | |
| 118 int | |
| 119 settupleitem(op, i, newitem) | |
| 120 register object *op; | |
| 121 register int i; | |
| 122 register object *newitem; | |
| 123 { | |
| 124 register object *olditem; | |
| 125 if (!is_tupleobject(op)) { | |
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126 XDECREF(newitem); |
| 27 | 127 err_badcall(); |
| 128 return -1; | |
| 6 | 129 } |
| 130 if (i < 0 || i >= ((tupleobject *)op) -> ob_size) { | |
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131 XDECREF(newitem); |
| 27 | 132 err_setstr(IndexError, "tuple assignment index out of range"); |
| 133 return -1; | |
| 6 | 134 } |
| 135 olditem = ((tupleobject *)op) -> ob_item[i]; | |
| 136 ((tupleobject *)op) -> ob_item[i] = newitem; | |
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137 XDECREF(olditem); |
| 6 | 138 return 0; |
| 139 } | |
| 140 | |
| 141 /* Methods */ | |
| 142 | |
| 143 static void | |
| 144 tupledealloc(op) | |
| 145 register tupleobject *op; | |
| 146 { | |
| 147 register int i; | |
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148 for (i = 0; i < op->ob_size; i++) |
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149 XDECREF(op->ob_item[i]); |
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150 #if MAXSAVESIZE > 0 |
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151 if (0 < op->ob_size && op->ob_size < MAXSAVESIZE) { |
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152 op->ob_item[0] = (object *) free_tuples[op->ob_size]; |
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153 free_tuples[op->ob_size] = op; |
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154 } else |
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155 #endif |
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156 free((ANY *)op); |
| 6 | 157 } |
| 158 | |
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159 static int |
| 6 | 160 tupleprint(op, fp, flags) |
| 161 tupleobject *op; | |
| 162 FILE *fp; | |
| 163 int flags; | |
| 164 { | |
| 165 int i; | |
| 166 fprintf(fp, "("); | |
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167 for (i = 0; i < op->ob_size; i++) { |
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168 if (i > 0) |
| 6 | 169 fprintf(fp, ", "); |
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170 if (printobject(op->ob_item[i], fp, 0) != 0) |
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171 return -1; |
| 6 | 172 } |
| 173 if (op->ob_size == 1) | |
| 174 fprintf(fp, ","); | |
| 175 fprintf(fp, ")"); | |
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176 return 0; |
| 6 | 177 } |
| 178 | |
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179 static object * |
| 6 | 180 tuplerepr(v) |
| 181 tupleobject *v; | |
| 182 { | |
| 183 object *s, *t, *comma; | |
| 184 int i; | |
| 185 s = newstringobject("("); | |
| 186 comma = newstringobject(", "); | |
| 187 for (i = 0; i < v->ob_size && s != NULL; i++) { | |
| 188 if (i > 0) | |
| 189 joinstring(&s, comma); | |
| 190 t = reprobject(v->ob_item[i]); | |
| 191 joinstring(&s, t); | |
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192 XDECREF(t); |
| 6 | 193 } |
| 194 DECREF(comma); | |
| 195 if (v->ob_size == 1) { | |
| 196 t = newstringobject(","); | |
| 197 joinstring(&s, t); | |
| 198 DECREF(t); | |
| 199 } | |
| 200 t = newstringobject(")"); | |
| 201 joinstring(&s, t); | |
| 202 DECREF(t); | |
| 203 return s; | |
| 204 } | |
| 205 | |
| 206 static int | |
| 207 tuplecompare(v, w) | |
| 208 register tupleobject *v, *w; | |
| 209 { | |
| 210 register int len = | |
| 211 (v->ob_size < w->ob_size) ? v->ob_size : w->ob_size; | |
| 212 register int i; | |
| 213 for (i = 0; i < len; i++) { | |
| 214 int cmp = cmpobject(v->ob_item[i], w->ob_item[i]); | |
| 215 if (cmp != 0) | |
| 216 return cmp; | |
| 217 } | |
| 218 return v->ob_size - w->ob_size; | |
| 219 } | |
| 220 | |
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221 static long |
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222 tuplehash(v) |
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223 tupleobject *v; |
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224 { |
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225 register long x, y; |
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226 register int len = v->ob_size; |
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227 register object **p; |
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228 x = 0x345678L; |
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229 p = v->ob_item; |
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230 while (--len >= 0) { |
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231 y = hashobject(*p++); |
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232 if (y == -1) |
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233 return -1; |
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234 x = (x + x + x) ^ y; |
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235 } |
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236 x ^= v->ob_size; |
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237 if (x == -1) |
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238 x = -2; |
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239 return x; |
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240 } |
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241 |
| 6 | 242 static int |
| 243 tuplelength(a) | |
| 244 tupleobject *a; | |
| 245 { | |
| 246 return a->ob_size; | |
| 247 } | |
| 248 | |
| 249 static object * | |
| 250 tupleitem(a, i) | |
| 251 register tupleobject *a; | |
| 252 register int i; | |
| 253 { | |
| 254 if (i < 0 || i >= a->ob_size) { | |
| 27 | 255 err_setstr(IndexError, "tuple index out of range"); |
| 6 | 256 return NULL; |
| 257 } | |
| 258 INCREF(a->ob_item[i]); | |
| 259 return a->ob_item[i]; | |
| 260 } | |
| 261 | |
| 262 static object * | |
| 263 tupleslice(a, ilow, ihigh) | |
| 264 register tupleobject *a; | |
| 265 register int ilow, ihigh; | |
| 266 { | |
| 267 register tupleobject *np; | |
| 268 register int i; | |
| 269 if (ilow < 0) | |
| 270 ilow = 0; | |
| 271 if (ihigh > a->ob_size) | |
| 272 ihigh = a->ob_size; | |
| 273 if (ihigh < ilow) | |
| 274 ihigh = ilow; | |
| 275 if (ilow == 0 && ihigh == a->ob_size) { | |
| 276 /* XXX can only do this if tuples are immutable! */ | |
| 277 INCREF(a); | |
| 278 return (object *)a; | |
| 279 } | |
| 280 np = (tupleobject *)newtupleobject(ihigh - ilow); | |
| 281 if (np == NULL) | |
| 282 return NULL; | |
| 283 for (i = ilow; i < ihigh; i++) { | |
| 284 object *v = a->ob_item[i]; | |
| 285 INCREF(v); | |
| 286 np->ob_item[i - ilow] = v; | |
| 287 } | |
| 288 return (object *)np; | |
| 289 } | |
| 290 | |
|
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291 object * |
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292 gettupleslice(op, i, j) |
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293 object *op; |
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294 int i, j; |
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295 { |
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296 if (op == NULL || !is_tupleobject(op)) { |
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297 err_badcall(); |
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298 return NULL; |
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299 } |
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300 return tupleslice((tupleobject *)op, i, j); |
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301 } |
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302 |
| 6 | 303 static object * |
| 304 tupleconcat(a, bb) | |
| 305 register tupleobject *a; | |
| 306 register object *bb; | |
| 307 { | |
| 308 register int size; | |
| 309 register int i; | |
| 310 tupleobject *np; | |
| 311 if (!is_tupleobject(bb)) { | |
| 27 | 312 err_badarg(); |
| 6 | 313 return NULL; |
| 314 } | |
| 315 #define b ((tupleobject *)bb) | |
| 316 size = a->ob_size + b->ob_size; | |
| 317 np = (tupleobject *) newtupleobject(size); | |
| 318 if (np == NULL) { | |
|
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319 return NULL; |
| 6 | 320 } |
| 321 for (i = 0; i < a->ob_size; i++) { | |
| 322 object *v = a->ob_item[i]; | |
| 323 INCREF(v); | |
| 324 np->ob_item[i] = v; | |
| 325 } | |
| 326 for (i = 0; i < b->ob_size; i++) { | |
| 327 object *v = b->ob_item[i]; | |
| 328 INCREF(v); | |
| 329 np->ob_item[i + a->ob_size] = v; | |
| 330 } | |
| 331 return (object *)np; | |
| 332 #undef b | |
| 333 } | |
| 334 | |
|
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335 static object * |
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336 tuplerepeat(a, n) |
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337 tupleobject *a; |
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338 int n; |
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339 { |
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340 int i, j; |
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341 int size; |
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342 tupleobject *np; |
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343 object **p; |
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344 if (n < 0) |
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345 n = 0; |
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346 if (a->ob_size*n == a->ob_size) { |
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347 /* Since tuples are immutable, we can return a shared |
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348 copy in this case */ |
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349 INCREF(a); |
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350 return (object *)a; |
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351 } |
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352 size = a->ob_size * n; |
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353 np = (tupleobject *) newtupleobject(size); |
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354 if (np == NULL) |
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355 return NULL; |
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356 p = np->ob_item; |
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357 for (i = 0; i < n; i++) { |
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358 for (j = 0; j < a->ob_size; j++) { |
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359 *p = a->ob_item[j]; |
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360 INCREF(*p); |
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361 p++; |
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362 } |
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363 } |
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364 return (object *) np; |
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365 } |
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366 |
| 6 | 367 static sequence_methods tuple_as_sequence = { |
| 368 tuplelength, /*sq_length*/ | |
| 369 tupleconcat, /*sq_concat*/ | |
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370 tuplerepeat, /*sq_repeat*/ |
| 6 | 371 tupleitem, /*sq_item*/ |
| 372 tupleslice, /*sq_slice*/ | |
| 373 0, /*sq_ass_item*/ | |
| 374 0, /*sq_ass_slice*/ | |
| 375 }; | |
| 376 | |
| 377 typeobject Tupletype = { | |
| 378 OB_HEAD_INIT(&Typetype) | |
| 379 0, | |
| 380 "tuple", | |
| 381 sizeof(tupleobject) - sizeof(object *), | |
| 382 sizeof(object *), | |
| 383 tupledealloc, /*tp_dealloc*/ | |
| 384 tupleprint, /*tp_print*/ | |
| 385 0, /*tp_getattr*/ | |
| 386 0, /*tp_setattr*/ | |
| 387 tuplecompare, /*tp_compare*/ | |
| 388 tuplerepr, /*tp_repr*/ | |
| 389 0, /*tp_as_number*/ | |
| 390 &tuple_as_sequence, /*tp_as_sequence*/ | |
| 391 0, /*tp_as_mapping*/ | |
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392 tuplehash, /*tp_hash*/ |
| 6 | 393 }; |
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394 |
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395 /* The following function breaks the notion that tuples are immutable: |
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396 it changes the size of a tuple. We get away with this only if there |
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397 is only one module referencing the object. You can also think of it |
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398 as creating a new tuple object and destroying the old one, only |
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399 more efficiently. In any case, don't use this if the tuple may |
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400 already be known to some other part of the code... |
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401 If last_is_sticky is set, the tuple will grow or shrink at the |
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402 front, otherwise it will grow or shrink at the end. */ |
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403 |
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404 int |
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405 resizetuple(pv, newsize, last_is_sticky) |
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406 object **pv; |
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407 int newsize; |
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408 int last_is_sticky; |
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409 { |
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410 register tupleobject *v; |
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411 register tupleobject *sv; |
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412 int i; |
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413 int sizediff; |
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414 |
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415 v = (tupleobject *) *pv; |
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416 sizediff = newsize - v->ob_size; |
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417 if (!is_tupleobject(v) || v->ob_refcnt != 1) { |
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418 *pv = 0; |
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419 DECREF(v); |
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420 err_badcall(); |
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421 return -1; |
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422 } |
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423 if (sizediff == 0) |
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424 return 0; |
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425 /* XXX UNREF/NEWREF interface should be more symmetrical */ |
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426 #ifdef REF_DEBUG |
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427 --ref_total; |
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428 #endif |
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429 UNREF(v); |
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430 if (last_is_sticky && sizediff < 0) { |
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431 /* shrinking: move entries to the front and zero moved entries */ |
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432 for (i = 0; i < newsize; i++) { |
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433 XDECREF(v->ob_item[i]); |
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434 v->ob_item[i] = v->ob_item[i - sizediff]; |
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435 v->ob_item[i - sizediff] = NULL; |
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436 } |
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437 } |
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Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
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438 for (i = newsize; i < v->ob_size; i++) { |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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439 XDECREF(v->ob_item[i]); |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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440 v->ob_item[i] = NULL; |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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441 } |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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442 sv = (tupleobject *) |
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1369
89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
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443 realloc((char *)v, |
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89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
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444 sizeof(tupleobject) + newsize * sizeof(object *)); |
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1380
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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445 *pv = (object *) sv; |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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446 if (sv == NULL) { |
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1369
89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
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447 DEL(v); |
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89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
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448 err_nomem(); |
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89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
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449 return -1; |
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89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
diff
changeset
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450 } |
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1380
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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451 NEWREF(sv); |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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452 for (i = sv->ob_size; i < newsize; i++) |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
453 sv->ob_item[i] = NULL; |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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454 if (last_is_sticky && sizediff > 0) { |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
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455 /* growing: move entries to the end and zero moved entries */ |
|
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
456 for (i = newsize - 1; i >= sizediff; i--) { |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
457 sv->ob_item[i] = sv->ob_item[i - sizediff]; |
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a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
458 sv->ob_item[i - sizediff] = NULL; |
|
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
459 } |
|
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
460 } |
|
a4aa83012af3
Fixed bugs in resizetuple and extended the interface.
Sjoerd Mullender <sjoerd@acm.org>
parents:
1369
diff
changeset
|
461 sv->ob_size = newsize; |
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1369
89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
diff
changeset
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462 return 0; |
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89e1e5d9ccbf
* compile.[ch]: support for lambda()
Guido van Rossum <guido@python.org>
parents:
1352
diff
changeset
|
463 } |