chiark - git - mdw - catacomb-python/blob - util.c

   1 /* -*-c-*-
   2  *
   3  * Miscellaneous utilities (not Catacomb-specific)
   4  *
   5  * (c) 2005 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Python interface to Catacomb.
  11  *
  12  * Catacomb/Python is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Catacomb/Python is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include "catacomb-python.h"
  30
  31 /* #undef HAVE_LONG_LONG */
  32
  33 /*----- External values ---------------------------------------------------*/
  34
  35 static PyObject *modname = 0;
  36 PyObject *home_module = 0;
  37
  38 /*----- Conversions -------------------------------------------------------*/
  39
  40 PyObject *getulong(unsigned long w)
  41 {
  42   if (w <= LONG_MAX)
  43     return (PyInt_FromLong(w));
  44   else
  45     return (PyLong_FromUnsignedLong(w));
  46 }
  47
  48 #ifndef HAVE_LONG_LONG
  49 static PyObject *i32 = 0;
  50 static int init_i32(void)
  51   { if (!i32 && (i32 = PyInt_FromLong(32)) == 0) return (-1); return (0); }
  52 #endif
  53
  54 PyObject *getk64(kludge64 u)
  55 {
  56 #ifdef HAVE_LONG_LONG
  57   return (PyLong_FromUnsignedLongLong(GET64(unsigned PY_LONG_LONG, u)));
  58 #else
  59   PyObject *i = 0, *j = 0, *t;
  60   PyObject *rc = 0;
  61
  62   if (init_i32()) goto end;
  63   if ((i = PyLong_FromUnsignedLong(HI64(u))) == 0) goto end;
  64   if ((t = PyNumber_InPlaceLshift(i, i32)) == 0) goto end;
  65   Py_DECREF(i); i = t;
  66   if ((j = PyLong_FromUnsignedLong(LO64(u))) == 0) goto end;
  67   if ((t = PyNumber_InPlaceOr(i, j)) == 0) goto end;
  68   Py_DECREF(i); i = t;
  69   if ((rc = PyNumber_Int(i)) == 0) goto end;
  70 end:
  71   if (i) Py_DECREF(i);
  72   if (j) Py_DECREF(j);
  73   return (rc);
  74 #endif
  75 }
  76
  77 PyObject *getbool(int b)
  78 {
  79   if (b) RETURN_TRUE;
  80   else RETURN_FALSE;
  81 }
  82
  83 PyObject *abstract_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
  84 {
  85   PyErr_SetString(PyExc_TypeError, "can't instantiate this class");
  86   return (0);
  87 }
  88
  89 int convulong(PyObject *o, void *pp)
  90 {
  91   long i;
  92   unsigned long *p = pp;
  93   PyObject *t;
  94
  95   if (!o) VALERR("can't delete");
  96   if (PyInt_Check(o)) {
  97     i = PyInt_AS_LONG(o);
  98     if (i < 0) VALERR("must be nonnegative");
  99     *p = i;
 100   } else {
 101     if ((t = PyNumber_Long(o)) == 0) goto end;
 102     *p = PyLong_AsUnsignedLong(t);
 103     Py_DECREF(t);
 104     if (PyErr_Occurred()) goto end;
 105   }
 106   return (1);
 107 end:
 108   return (0);
 109 }
 110
 111 #ifdef HAVE_UINT64
 112 #  define CONVu64(n) do {                                               \
 113      kludge64 k;                                                        \
 114      uint64 t;                                                          \
 115      if (!convk64(o, &k)) goto end;                                     \
 116      t = GET64(uint64, k);                                              \
 117      if (t > MASK##n) VALERR("out of range");                           \
 118      *p = t;                                                            \
 119    } while (0)
 120 #else
 121 #  define CONVu64(n) assert(!"shouldn't be possible")
 122 #endif
 123
 124 #define CONVU_(n)                                                       \
 125   int convu##n(PyObject *o, void *pp)                                   \
 126   {                                                                     \
 127     unsigned long u;                                                    \
 128     uint##n *p = pp;                                                    \
 129                                                                         \
 130     if (MASK##n > ULONG_MAX)                                            \
 131       CONVu64(n);                                                       \
 132     else {                                                              \
 133       if (!convulong(o, &u)) goto end;                                  \
 134       if (u > MASK##n) VALERR("out of range");                          \
 135       *p = u;                                                           \
 136     }                                                                   \
 137     return (1);                                                         \
 138   end:                                                                  \
 139     return (0);                                                         \
 140   }
 141 DOUINTSZ(CONVU_)
 142
 143 int convuint(PyObject *o, void *pp)
 144 {
 145   unsigned long u;
 146   unsigned *p = pp;
 147
 148   if (!convulong(o, &u)) goto end;
 149   if (u > UINT_MAX) VALERR("out of range");
 150   *p = u;
 151   return (1);
 152 end:
 153   return (0);
 154 }
 155
 156 int convk64(PyObject *o, void *pp)
 157 {
 158   PyObject *i = 0;
 159   int rc = 0;
 160 #if HAVE_LONG_LONG
 161   unsigned PY_LONG_LONG t;
 162 #else
 163   PyObject *t;
 164   uint32 lo, hi;
 165 #endif
 166
 167   if (!o) VALERR("can't delete");
 168 #if HAVE_LONG_LONG
 169   if ((i = PyNumber_Long(o)) == 0) goto end;
 170   t = PyLong_AsUnsignedLongLong(i);
 171   if (t == (unsigned PY_LONG_LONG)-1 && PyErr_Occurred()) goto end;
 172   ASSIGN64(*(kludge64 *)pp, t);
 173 #else
 174   if (init_i32()) goto end;
 175   if ((i = PyNumber_Int(o)) == 0) goto end;
 176   lo = PyInt_AsUnsignedLongMask(i);
 177   if ((t = PyNumber_InPlaceRshift(i, i32)) == 0) goto end;
 178   Py_DECREF(i); i = t;
 179   hi = PyInt_AsUnsignedLongMask(i);
 180   if ((t = PyNumber_InPlaceRshift(i, i32)) == 0) goto end;
 181   Py_DECREF(i); i = t;
 182   if (PyObject_IsTrue(i)) VALERR("out of range");
 183   SET64(*(kludge64 *)pp, hi, lo);
 184 #endif
 185   rc = 1;
 186
 187 end:
 188   if (i) Py_DECREF(i);
 189   return (rc);
 190 }
 191
 192 int convmpw(PyObject *o, void *pp)
 193 {
 194   unsigned long u;
 195   unsigned *p = pp;
 196
 197   if (!convulong(o, &u)) goto end;
 198   if (u > MPW_MAX) VALERR("out of range");
 199   *p = u;
 200   return (1);
 201 end:
 202   return (0);
 203 }
 204
 205 int convszt(PyObject *o, void *pp)
 206 {
 207   unsigned long u;
 208   size_t *p = pp;
 209
 210   if (!convulong(o, &u)) goto end;
 211   if (u > ~(size_t)0) VALERR("out of range");
 212   *p = u;
 213   return (1);
 214 end:
 215   return (0);
 216 }
 217
 218 int convbool(PyObject *o, void *pp)
 219 {
 220   if (!o) VALERR("can't delete");
 221   *(int *)pp = PyObject_IsTrue(o);
 222   return (1);
 223 end:
 224   return (0);
 225 }
 226
 227 /*----- Type messing ------------------------------------------------------*/
 228
 229 static const PyTypeObject emptytype = { 0 };
 230
 231 void *newtype(PyTypeObject *metaty,
 232               const PyTypeObject *skel,
 233               const char *name)
 234 {
 235   PyHeapTypeObject *ty =
 236     (PyHeapTypeObject *)_PyObject_GC_Malloc(_PyObject_VAR_SIZE(metaty, 0));
 237   if (!skel) skel = &emptytype;
 238   memcpy(ty, skel, sizeof(*skel));
 239   if (ty->ht_type.tp_base) Py_INCREF(ty->ht_type.tp_base);
 240 #define COPY(blah) do {                                                 \
 241     if (ty->ht_type.tp_as_##blah) {                                     \
 242       memcpy(&ty->as_##blah,                                            \
 243              ty->ht_type.tp_as_##blah,                                  \
 244              sizeof(ty->as_##blah));                                    \
 245       ty->ht_type.tp_as_##blah = &ty->as_##blah;                        \
 246     }                                                                   \
 247   } while (0)
 248   COPY(number);
 249   COPY(sequence);
 250   COPY(mapping);
 251   COPY(buffer);
 252 #undef COPY
 253   if (name)
 254     ty->ht_name = PyString_FromString(name);
 255   else if (ty->ht_type.tp_name)
 256     ty->ht_name = PyString_FromString(ty->ht_type.tp_name);
 257   if (ty->ht_name)
 258     ty->ht_type.tp_name = PyString_AS_STRING(ty->ht_name);
 259   DISCARD(PyObject_INIT(&ty->ht_type, metaty));
 260   Py_INCREF(metaty);
 261   return (ty);
 262 }
 263
 264 void typeready(PyTypeObject *ty)
 265 {
 266   PyType_Ready(ty);
 267   PyDict_SetItemString(ty->tp_dict, "__module__", modname);
 268 }
 269
 270 PyTypeObject *inittype(PyTypeObject *tyskel, PyTypeObject *meta)
 271 {
 272   PyTypeObject *ty = newtype(meta, tyskel, 0);
 273   ty->tp_flags |= Py_TPFLAGS_HEAPTYPE;
 274   typeready(ty);
 275   return (ty);
 276 }
 277
 278 /*----- Constants ---------------------------------------------------------*/
 279
 280 void setconstants(PyObject *mod, const struct nameval *c)
 281 {
 282   PyObject *x;
 283
 284   while (c->name) {
 285     if (c->value > LONG_MAX)
 286       x = PyLong_FromUnsignedLong(c->value);
 287     else
 288       x = PyInt_FromLong(c->value);
 289     PyModule_AddObject(mod, (/*unconst*/ char *)c->name, x);
 290     c++;
 291   }
 292 }
 293
 294 /*----- Building method tables --------------------------------------------*/
 295
 296 DA_DECL(method_v, PyMethodDef);
 297 static method_v global_pymethods = DA_INIT;
 298 void addmethods(const PyMethodDef *m)
 299 {
 300   size_t n;
 301
 302   for (n = 0; m[n].ml_name; n++);
 303   DA_ENSURE(&global_pymethods, n);
 304   memcpy(DA(&global_pymethods) + DA_LEN(&global_pymethods),
 305          m, n * sizeof(*m));
 306   DA_EXTEND(&global_pymethods, n);
 307 }
 308
 309 PyMethodDef *donemethods(void)
 310 {
 311   static const PyMethodDef mzero = { 0 };
 312   DA_PUSH(&global_pymethods, mzero);
 313   return (DA(&global_pymethods));
 314 }
 315
 316 /*----- Exceptions --------------------------------------------------------*/
 317
 318 PyObject *mkexc(PyObject *mod, PyObject *base,
 319                 const char *name, PyMethodDef *mm)
 320 {
 321   PyObject *nameobj = 0;
 322   PyObject *dict = 0;
 323   PyObject *exc = 0;
 324   PyObject *func = 0;
 325   PyObject *meth = 0;
 326
 327   if ((nameobj = PyString_FromFormat("%s.%s",
 328                                      PyModule_GetName(mod),
 329                                      name)) == 0 ||
 330       (dict = PyDict_New()) == 0 ||
 331       (exc = PyErr_NewException(PyString_AS_STRING(nameobj),
 332                                 base, dict)) == 0)
 333     goto fail;
 334
 335   if (mm) {
 336     while (mm->ml_name) {
 337       if ((func = PyCFunction_NewEx(mm, 0, mod)) == 0 ||
 338           (meth = PyMethod_New(func, 0, exc)) == 0 ||
 339           PyDict_SetItemString(dict, mm->ml_name, meth))
 340         goto fail;
 341       Py_DECREF(func); func = 0;
 342       Py_DECREF(meth); meth = 0;
 343       mm++;
 344     }
 345   }
 346
 347 done:
 348   Py_XDECREF(nameobj);
 349   Py_XDECREF(dict);
 350   return (exc);
 351
 352 fail:
 353   Py_XDECREF(exc);
 354   Py_XDECREF(func);
 355   Py_XDECREF(meth);
 356   exc = 0;
 357   goto done;
 358 }
 359
 360 void report_lost_exception_v(struct excinfo *exc,
 361                              const char *why, va_list ap)
 362 {
 363   PyObject *hookfn = 0;
 364   PyObject *whyobj = 0;
 365   PyObject *obj = 0;
 366
 367   /* Make sure we start out without a pending exception, or this will get
 368    * really confusing.
 369    */
 370   assert(!PyErr_Occurred());
 371
 372   /* Format the explanation. */
 373   if (why) whyobj = PyString_FromFormatV(why, ap);
 374   else { whyobj = Py_None; Py_INCREF(whyobj); }
 375
 376   /* Find our home module's `lostexchook' function.  This won't work if
 377    * there's no module, or the function isn't defined, or it's `None'.
 378    */
 379   if (!home_module) goto sys;
 380   hookfn = PyObject_GetAttrString(home_module, "lostexchook");
 381   if (hookfn == Py_None) goto sys;
 382   else if (hookfn) ;
 383   else if (!PyErr_ExceptionMatches(PyExc_AttributeError)) goto ouch;
 384   else { PyErr_Clear(); goto sys; }
 385
 386   /* Call the hook function. */
 387   obj = PyObject_CallFunction(hookfn, "(OOOO)",
 388                               whyobj, exc->ty, exc->val, exc->tb);
 389   if (!obj) goto ouch;
 390   goto end;
 391
 392   /* Something went wrong reporting the problem. */
 393 ouch:
 394   PySys_WriteStderr("\n!!! FAILURE REPORTING LOST EXCEPTION\n");
 395   PyErr_Print();
 396   /* drop through... */
 397
 398   /* There was no hook, so try to do something sensible using
 399    * `sys.excepthook'.
 400    */
 401 sys:
 402   PySys_WriteStderr("\n!!! LOST EXCEPTION: %s\n",
 403                     PyString_AS_STRING(whyobj));
 404   RESTORE_EXCINFO(exc);
 405   PyErr_Print();
 406   /* drop through... */
 407
 408   /* Clean up afterwards. */
 409 end:
 410   Py_XDECREF(hookfn);
 411   Py_XDECREF(whyobj);
 412   Py_XDECREF(obj);
 413 }
 414
 415 void report_lost_exception(struct excinfo *exc, const char *why, ...)
 416 {
 417   va_list ap;
 418
 419   va_start(ap, why);
 420   report_lost_exception_v(exc, why, ap);
 421   va_end(ap);
 422 }
 423
 424 void stash_exception(struct excinfo *exc, const char *why, ...)
 425 {
 426   va_list ap;
 427   struct excinfo stash;
 428
 429   if (!exc->ty)
 430     STASH_EXCINFO(exc);
 431   else {
 432     va_start(ap, why);
 433     STASH_EXCINFO(&stash);
 434     report_lost_exception_v(&stash, why, ap);
 435     va_end(ap);
 436   }
 437 }
 438
 439 void restore_exception(struct excinfo *exc, const char *why, ...)
 440 {
 441   va_list ap;
 442   struct excinfo stash;
 443
 444   if (!PyErr_Occurred())
 445     RESTORE_EXCINFO(exc);
 446   else {
 447     va_start(ap, why);
 448     STASH_EXCINFO(&stash);
 449     report_lost_exception_v(exc, why, ap);
 450     RESTORE_EXCINFO(&stash);
 451     va_end(ap);
 452   }
 453 }
 454
 455 /*----- Generic dictionary methods ----------------------------------------*/
 456
 457 static PyTypeObject *itemiter_pytype, *valiter_pytype;
 458
 459 typedef struct iter_pyobj {
 460   PyObject_HEAD
 461   PyObject *map;
 462   PyObject *i;
 463 } iter_pyobj;
 464 #define ITER_MAP(o) (((iter_pyobj *)(o))->map)
 465 #define ITER_I(o) (((iter_pyobj *)(o))->i)
 466
 467 static void iter_pydealloc(PyObject *me)
 468   { Py_DECREF(ITER_MAP(me)); Py_DECREF(ITER_I(me)); FREEOBJ(me); }
 469
 470 static PyObject *itemiter_pynext(PyObject *me)
 471 {
 472   PyObject *k = 0, *v = 0, *rc = 0;
 473
 474   if ((k = PyIter_Next(ITER_I(me))) != 0 &&
 475       (v = PyObject_GetItem(ITER_MAP(me), k)) != 0)
 476     rc = Py_BuildValue("(OO)", k, v);
 477   Py_XDECREF(k); Py_XDECREF(v);
 478   return (rc);
 479 }
 480
 481 static PyTypeObject itemiter_pytype_skel = {
 482   PyObject_HEAD_INIT(0) 0,              /* Header */
 483   "ItemIter",                           /* @tp_name@ */
 484   sizeof(iter_pyobj),                   /* @tp_basicsize@ */
 485   0,                                    /* @tp_itemsize@ */
 486
 487   iter_pydealloc,                       /* @tp_dealloc@ */
 488   0,                                    /* @tp_print@ */
 489   0,                                    /* @tp_getattr@ */
 490   0,                                    /* @tp_setattr@ */
 491   0,                                    /* @tp_compare@ */
 492   0,                                    /* @tp_repr@ */
 493   0,                                    /* @tp_as_number@ */
 494   0,                                    /* @tp_as_sequence@ */
 495   0,                                    /* @tp_as_mapping@ */
 496   0,                                    /* @tp_hash@ */
 497   0,                                    /* @tp_call@ */
 498   0,                                    /* @tp_str@ */
 499   0,                                    /* @tp_getattro@ */
 500   0,                                    /* @tp_setattro@ */
 501   0,                                    /* @tp_as_buffer@ */
 502   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 503     Py_TPFLAGS_BASETYPE,
 504
 505   /* @tp_doc@ */
 506 "Iterates over the keys of a mapping.",
 507
 508   0,                                    /* @tp_traverse@ */
 509   0,                                    /* @tp_clear@ */
 510   0,                                    /* @tp_richcompare@ */
 511   0,                                    /* @tp_weaklistoffset@ */
 512   PyObject_SelfIter,                    /* @tp_iter@ */
 513   itemiter_pynext,                      /* @tp_iternext@ */
 514   0,                                    /* @tp_methods@ */
 515   0,                                    /* @tp_members@ */
 516   0,                                    /* @tp_getset@ */
 517   0,                                    /* @tp_base@ */
 518   0,                                    /* @tp_dict@ */
 519   0,                                    /* @tp_descr_get@ */
 520   0,                                    /* @tp_descr_set@ */
 521   0,                                    /* @tp_dictoffset@ */
 522   0,                                    /* @tp_init@ */
 523   PyType_GenericAlloc,                  /* @tp_alloc@ */
 524   abstract_pynew,                       /* @tp_new@ */
 525   0,                                    /* @tp_free@ */
 526   0                                     /* @tp_is_gc@ */
 527 };
 528
 529 static PyObject *valiter_pynext(PyObject *me)
 530 {
 531   PyObject *k = 0, *rc = 0;
 532
 533   if ((k = PyIter_Next(ITER_I(me))) != 0)
 534     rc = PyObject_GetItem(ITER_MAP(me), k);
 535   Py_XDECREF(k);
 536   return (rc);
 537 }
 538
 539 static PyTypeObject valiter_pytype_skel = {
 540   PyObject_HEAD_INIT(0) 0,              /* Header */
 541   "ValueIter",                          /* @tp_name@ */
 542   sizeof(iter_pyobj),                   /* @tp_basicsize@ */
 543   0,                                    /* @tp_itemsize@ */
 544
 545   iter_pydealloc,                       /* @tp_dealloc@ */
 546   0,                                    /* @tp_print@ */
 547   0,                                    /* @tp_getattr@ */
 548   0,                                    /* @tp_setattr@ */
 549   0,                                    /* @tp_compare@ */
 550   0,                                    /* @tp_repr@ */
 551   0,                                    /* @tp_as_number@ */
 552   0,                                    /* @tp_as_sequence@ */
 553   0,                                    /* @tp_as_mapping@ */
 554   0,                                    /* @tp_hash@ */
 555   0,                                    /* @tp_call@ */
 556   0,                                    /* @tp_str@ */
 557   0,                                    /* @tp_getattro@ */
 558   0,                                    /* @tp_setattro@ */
 559   0,                                    /* @tp_as_buffer@ */
 560   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 561     Py_TPFLAGS_BASETYPE,
 562
 563   /* @tp_doc@ */
 564 "Iterates over the values of a mapping.",
 565
 566   0,                                    /* @tp_traverse@ */
 567   0,                                    /* @tp_clear@ */
 568   0,                                    /* @tp_richcompare@ */
 569   0,                                    /* @tp_weaklistoffset@ */
 570   PyObject_SelfIter,                    /* @tp_iter@ */
 571   valiter_pynext,                       /* @tp_iternext@ */
 572   0,                                    /* @tp_methods@ */
 573   0,                                    /* @tp_members@ */
 574   0,                                    /* @tp_getset@ */
 575   0,                                    /* @tp_base@ */
 576   0,                                    /* @tp_dict@ */
 577   0,                                    /* @tp_descr_get@ */
 578   0,                                    /* @tp_descr_set@ */
 579   0,                                    /* @tp_dictoffset@ */
 580   0,                                    /* @tp_init@ */
 581   PyType_GenericAlloc,                  /* @tp_alloc@ */
 582   abstract_pynew,                       /* @tp_new@ */
 583   0,                                    /* @tp_free@ */
 584   0                                     /* @tp_is_gc@ */
 585 };
 586
 587 PySequenceMethods gmap_pysequence = {
 588   0,                                    /* @sq_length@ */
 589   0,                                    /* @sq_concat@ */
 590   0,                                    /* @sq_repeat@ */
 591   0,                                    /* @sq_item@ */
 592   0,                                    /* @sq_slice@ */
 593   0,                                    /* @sq_ass_item@ */
 594   0,                                    /* @sq_ass_slice@ */
 595   PyMapping_HasKey,                     /* @sq_contains@ */
 596   0,                                    /* @sq_inplace_concat@ */
 597   0                                     /* @sq_inplace_repeat@ */
 598 };
 599
 600 Py_ssize_t gmap_pysize(PyObject *me)
 601 {
 602   PyObject *i = 0, *x = 0;
 603   Py_ssize_t rc = -1, n = 0;
 604
 605   if ((i = PyObject_GetIter(me)) == 0) goto done;
 606   while ((x = PyIter_Next(i)) != 0) { n++; Py_DECREF(x); x = 0; }
 607   if (PyErr_Occurred()) goto done;
 608   rc = n;
 609 done:
 610   Py_XDECREF(i); Py_XDECREF(x);
 611   return (rc);
 612 }
 613
 614 PyObject *gmapmeth_has_key(PyObject *me, PyObject *arg)
 615 {
 616   PyObject *k;
 617   if (!PyArg_ParseTuple(arg, "O:has_key", &k)) return (0);
 618   return (getbool(PyMapping_HasKey(me, k)));
 619 }
 620
 621 PyObject *gmapmeth_keys(PyObject *me, PyObject *arg)
 622 {
 623   PyObject *l = 0, *i = 0, *k, *rc = 0;
 624   int err;
 625
 626   if (!PyArg_ParseTuple(arg, ":keys") ||
 627       (l = PyList_New(0)) == 0 ||
 628       (i = PyObject_GetIter(me)) == 0)
 629     goto done;
 630   while ((k = PyIter_Next(i)) != 0)
 631     { err = PyList_Append(l, k); Py_DECREF(k); if (err) goto done; }
 632   if (PyErr_Occurred()) goto done;
 633   rc = l; l = 0;
 634 done:
 635   Py_XDECREF(l); Py_XDECREF(i);
 636   return (rc);
 637 }
 638
 639 PyObject *gmapmeth_values(PyObject *me, PyObject *arg)
 640 {
 641   PyObject *l = 0, *i = 0, *k, *v, *rc = 0;
 642   int err = 0;
 643
 644   if (!PyArg_ParseTuple(arg, ":values") ||
 645       (l = PyList_New(0)) == 0 ||
 646       (i = PyObject_GetIter(me)) == 0)
 647     goto done;
 648   while ((k = PyIter_Next(i)) != 0) {
 649     if ((v = PyObject_GetItem(me, k)) == 0 ||
 650         PyList_Append(l, v))
 651       err = -1;
 652     Py_DECREF(k); Py_XDECREF(v);
 653     if (err) goto done;
 654   }
 655   if (PyErr_Occurred()) goto done;
 656   rc = l; l = 0;
 657 done:
 658   Py_XDECREF(l); Py_XDECREF(i);
 659   return (rc);
 660 }
 661
 662 PyObject *gmapmeth_items(PyObject *me, PyObject *arg)
 663 {
 664   PyObject *l = 0, *i = 0, *k, *v, *z, *rc = 0;
 665   int err = 0;
 666
 667   if (!PyArg_ParseTuple(arg, ":items") ||
 668       (l = PyList_New(0)) == 0 ||
 669       (i = PyObject_GetIter(me)) == 0)
 670     goto done;
 671   while ((k = PyIter_Next(i)) != 0) {
 672     z = 0;
 673     if ((v = PyObject_GetItem(me, k)) == 0 ||
 674         (z = Py_BuildValue("(OO)", k, v)) == 0 ||
 675         PyList_Append(l, z))
 676       err = -1;
 677     Py_DECREF(k); Py_XDECREF(v); Py_XDECREF(z);
 678     if (err) goto done;
 679   }
 680   if (PyErr_Occurred()) goto done;
 681   rc = l; l = 0;
 682 done:
 683   Py_XDECREF(l); Py_XDECREF(i);
 684   return (rc);
 685 }
 686
 687 PyObject *gmapmeth_iterkeys(PyObject *me, PyObject *arg)
 688 {
 689   if (!PyArg_ParseTuple(arg, ":iterkeys")) return (0);
 690   return (PyObject_GetIter(me));
 691 }
 692
 693 PyObject *gmapmeth_itervalues(PyObject *me, PyObject *arg)
 694 {
 695   PyObject *i;
 696   iter_pyobj *ii;
 697
 698   if (!PyArg_ParseTuple(arg, ":itervalues") ||
 699       (i = PyObject_GetIter(me)) == 0)
 700     return (0);
 701   ii = PyObject_NEW(iter_pyobj, valiter_pytype);
 702   ii->map = me; Py_INCREF(me);
 703   ii->i = i;
 704   return ((PyObject *)ii);
 705 }
 706
 707 PyObject *gmapmeth_iteritems(PyObject *me, PyObject *arg)
 708 {
 709   PyObject *i;
 710   iter_pyobj *ii;
 711
 712   if (!PyArg_ParseTuple(arg, ":iteritems") ||
 713       (i = PyObject_GetIter(me)) == 0)
 714     return (0);
 715   ii = PyObject_NEW(iter_pyobj, itemiter_pytype);
 716   ii->map = me; Py_INCREF(me);
 717   ii->i = i;
 718   return ((PyObject *)ii);
 719 }
 720
 721 PyObject *gmapmeth_clear(PyObject *me, PyObject *arg)
 722 {
 723   PyObject *i = 0, *k = 0, *rc = 0;
 724
 725   if (!PyArg_ParseTuple(arg, ":clear") ||
 726       (i = PyObject_GetIter(me)) == 0)
 727     goto end;
 728   while ((k = PyIter_Next(i)) != 0) {
 729     PyObject_DelItem(me, k);
 730     Py_DECREF(k);
 731   }
 732   if (PyErr_Occurred()) goto end;
 733   rc = me; Py_INCREF(me);
 734 end:
 735   Py_XDECREF(i);
 736   return (rc);
 737 }
 738
 739 static char *def_kwlist[] = { "key", "default", 0 };
 740
 741 PyObject *gmapmeth_get(PyObject *me, PyObject *arg, PyObject *kw)
 742 {
 743   PyObject *k, *def = Py_None, *v;
 744
 745   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO:get", def_kwlist, &k, &def))
 746     return (0);
 747   if ((v = PyObject_GetItem(me, k)) != 0) return (v);
 748   PyErr_Clear();
 749   RETURN_OBJ(def);
 750 }
 751
 752 PyObject *gmapmeth_setdefault(PyObject *me, PyObject *arg, PyObject *kw)
 753 {
 754   PyObject *k, *def = Py_None, *v;
 755
 756   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO:setdefault",
 757                                    def_kwlist, &k, &def))
 758     return (0);
 759   if ((v = PyObject_GetItem(me, k)) != 0) return (v);
 760   PyErr_Clear();
 761   if (PyObject_SetItem(me, k, def)) return (0);
 762   RETURN_OBJ(def);
 763 }
 764
 765 PyObject *gmapmeth_pop(PyObject *me, PyObject *arg, PyObject *kw)
 766 {
 767   PyObject *k, *def = 0, *v;
 768
 769   if (!PyArg_ParseTupleAndKeywords(arg, kw, "OO:pop", def_kwlist, &k, &def))
 770     return (0);
 771   if ((v = PyObject_GetItem(me, k)) != 0) {
 772     PyObject_DelItem(me, k);
 773     return (v);
 774   }
 775   PyErr_Clear();
 776   RETURN_OBJ(def);
 777 }
 778
 779 PyObject *gmapmeth_update(PyObject *me, PyObject *arg)
 780 {
 781   PyObject *map, *i = 0, *k, *v, *rc = 0;
 782   int err = 0;
 783
 784   if (!PyArg_ParseTuple(arg, "O:update", &map) ||
 785       (i = PyObject_GetIter(map)) == 0)
 786     goto end;
 787   while ((k = PyIter_Next(i)) != 0) {
 788     if ((v = PyObject_GetItem(map, k)) == 0 ||
 789         PyObject_SetItem(me, k, v))
 790       err = -1;
 791     Py_DECREF(k); Py_XDECREF(v);
 792     if (err) goto end;
 793   }
 794   if (PyErr_Occurred()) goto end;
 795   rc = me; Py_INCREF(me);
 796 end:
 797   Py_XDECREF(i);
 798   return (rc);
 799 }
 800
 801 PyObject *gmapmeth_popitem(PyObject *me, PyObject *arg)
 802 {
 803   PyObject *i = 0, *k = 0, *v = 0, *rc = 0;
 804
 805   if (!PyArg_ParseTuple(arg, ":popitem") ||
 806       (i = PyObject_GetIter(me)))
 807     goto end;
 808   if ((k = PyIter_Next(i)) == 0) {
 809     if (!PyErr_Occurred()) VALERR("popitem(): mapping is empty");
 810     goto end;
 811   }
 812   if ((v = PyObject_GetItem(me, k)) == 0 ||
 813       PyObject_DelItem(me, k))
 814     goto end;
 815   rc = Py_BuildValue("(OO)", k, v);
 816 end:
 817   Py_XDECREF(i); Py_XDECREF(k); Py_XDECREF(v);
 818   return (rc);
 819 }
 820
 821 PyMethodDef gmap_pymethods[] = {
 822   GMAP_METHODS
 823   { 0 }
 824 };
 825
 826 /*----- Initialization ----------------------------------------------------*/
 827
 828 static PyObject *meth__set_home_module(PyObject *me, PyObject *arg)
 829 {
 830   PyObject *mod;
 831
 832   if (!PyArg_ParseTuple(arg, "O!:_set_home_module", &PyModule_Type, &mod))
 833     return (0);
 834   Py_XDECREF(home_module); home_module = mod; Py_INCREF(home_module);
 835   RETURN_NONE;
 836 }
 837
 838 static const PyMethodDef methods[] = {
 839 #define METHNAME(func) meth_##func
 840   METH  (_set_home_module,      "_set_home_module(MOD)")
 841 #undef METHNAME
 842   { 0 }
 843 };
 844
 845 void util_pyinit(void)
 846 {
 847   modname = PyString_FromString("catacomb");
 848   INITTYPE(itemiter, root);
 849   INITTYPE(valiter, root);
 850   addmethods(methods);
 851 }
 852
 853 void util_pyinsert(PyObject *mod)
 854 {
 855   INSERT("ItemIter", itemiter_pytype);
 856   INSERT("ValueIter", valiter_pytype);
 857 }
 858
 859 /*----- That's all, folks -------------------------------------------------*/