[pyke] / pyke.c

/* -*-c-*-
 *
 * Pyke: the Python Kit for Extensions
 *
 * (c) 2019 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------*
 *
 * This file is part of Pyke: the Python Kit for Extensions.
 *
 * Pyke is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * Pyke is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Pyke.  If not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*----- Header files ------------------------------------------------------*/

#include "pyke.h"

/*----- External variables ------------------------------------------------*/

PyObject *modname;
PyObject *home_module;

/*----- Conversions -------------------------------------------------------*/

PyObject *getulong(unsigned long w)
{
  if (w <= LONG_MAX) return (PyInt_FromLong(w));
  else return (PyLong_FromUnsignedLong(w));
}

PyObject *getbool(int b)
  { if (b) RETURN_TRUE; else RETURN_FALSE; }

int convulong(PyObject *o, void *pp)
{
  unsigned long *p = pp;
  PyObject *t;

  if (!o) VALERR("can't delete");
  if (PyInt_Check(o)) {
    long i = PyInt_AS_LONG(o);
    if (i < 0) VALERR("must be nonnegative");
    *p = i;
  } else
  {
    if ((t = PyNumber_Long(o)) == 0) goto end;
    *p = PyLong_AsUnsignedLong(t);
    Py_DECREF(t);
    if (PyErr_Occurred()) goto end;
  }
  return (1);
end:
  return (0);
}

int convuint(PyObject *o, void *pp)
{
  unsigned long u;
  unsigned *p = pp;

  if (!convulong(o, &u)) goto end;
  if (u > UINT_MAX) VALERR("out of range");
  *p = u;
  return (1);
end:
  return (0);
}

int convszt(PyObject *o, void *pp)
{
  unsigned long u;
  size_t *p = pp;

  if (!convulong(o, &u)) goto end;
  if (u > ~(size_t)0) VALERR("out of range");
  *p = u;
  return (1);
end:
  return (0);
}

int convbool(PyObject *o, void *pp)
{
  if (!o) VALERR("can't delete");
  *(int *)pp = PyObject_IsTrue(o);
  return (1);
end:
  return (0);
}

int convbin(PyObject *o, void *pp)
{
  struct bin *r = pp;

  if (BIN_CHECK(o)) {
    r->p = BIN_PTR(o);
    r->sz = BIN_LEN(o);
    return (1);
  }
  if (PyUnicode_Check(o)) {
    o = _PyUnicode_AsDefaultEncodedString(o, 0);
    if (!o) return (0);
    r->p = PyString_AS_STRING(o);
    r->sz = PyString_GET_SIZE(o);
    return (1);
  }
  return (PyObject_AsReadBuffer(o, &r->p, &r->sz) ? 0 : 1);
}

/*----- Miscellaneous utilities -------------------------------------------*/

PyObject *abstract_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
{
  PyErr_SetString(PyExc_TypeError, "can't instantiate this class");
  return (0);
}

PyObject *enrich_compare(int op, int cmp)
{
  int r = -1;

  switch (op) {
    case Py_LT: r = cmp <  0; break;
    case Py_LE: r = cmp <= 0; break;
    case Py_EQ: r = cmp == 0; break;
    case Py_NE: r = cmp != 0; break;
    case Py_GE: r = cmp >= 0; break;
    case Py_GT: r = cmp >  0; break;
    default: assert(0);
  }
  return (getbool(r));
}

/*----- Saving and restoring exceptions ----------------------------------*/

void report_lost_exception_v(struct excinfo *exc,
			     const char *why, va_list ap)
{
  PyObject *hookfn = 0;
  PyObject *whyobj = 0;
  PyObject *obj = 0;

  /* Make sure we start out without a pending exception, or this will get
   * really confusing.
   */
  assert(!PyErr_Occurred());

  /* Format the explanation. */
  if (why) whyobj = TEXT_VFORMAT(why, ap);
  else { whyobj = Py_None; Py_INCREF(whyobj); }

  /* Find our home module's `lostexchook' function.  This won't work if
   * there's no module, or the function isn't defined, or it's `None'.
   */
  if (!home_module) goto sys;
  hookfn = PyObject_GetAttrString(home_module, "lostexchook");
  if (hookfn == Py_None) goto sys;
  else if (hookfn) ;
  else if (!PyErr_ExceptionMatches(PyExc_AttributeError)) goto ouch;
  else { PyErr_Clear(); goto sys; }

  /* Call the hook function. */
  obj = PyObject_CallFunction(hookfn, "(OOOO)",
			      whyobj, exc->ty, exc->val, exc->tb);
  if (!obj) goto ouch;
  goto end;

  /* Something went wrong reporting the problem. */
ouch:
  PySys_WriteStderr("\n!!! FAILURE REPORTING LOST EXCEPTION\n");
  PyErr_Print();
  /* drop through... */

  /* There was no hook, so try to do something sensible using
   * `sys.excepthook'.
   */
sys:
  PySys_WriteStderr("\n!!! LOST EXCEPTION: %s\n", TEXT_PTR(whyobj));
  RESTORE_EXCINFO(exc);
  PyErr_Print();
  /* drop through... */

  /* Clean up afterwards. */
end:
  Py_XDECREF(hookfn);
  Py_XDECREF(whyobj);
  Py_XDECREF(obj);
}

void report_lost_exception(struct excinfo *exc, const char *why, ...)
{
  va_list ap;

  va_start(ap, why);
  report_lost_exception_v(exc, why, ap);
  va_end(ap);
}

void stash_exception(struct excinfo *exc, const char *why, ...)
{
  va_list ap;
  struct excinfo stash;

  if (!exc->ty)
    STASH_EXCINFO(exc);
  else {
    va_start(ap, why);
    STASH_EXCINFO(&stash);
    report_lost_exception_v(&stash, why, ap);
    va_end(ap);
  }
}

void restore_exception(struct excinfo *exc, const char *why, ...)
{
  va_list ap;
  struct excinfo stash;

  if (!PyErr_Occurred())
    RESTORE_EXCINFO(exc);
  else {
    va_start(ap, why);
    STASH_EXCINFO(&stash);
    report_lost_exception_v(exc, why, ap);
    RESTORE_EXCINFO(&stash);
    va_end(ap);
  }
}

/*----- Type definitions --------------------------------------------------*/

static const PyTypeObject emptytype = { 0 };

void *newtype(PyTypeObject *metaty,
	      const PyTypeObject *skel,
	      const char *name)
{
  PyHeapTypeObject *ty =
    (PyHeapTypeObject *)_PyObject_GC_Malloc(_PyObject_VAR_SIZE(metaty, 0));
  if (!skel) skel = &emptytype;
  memcpy(ty, skel, sizeof(*skel));
#define COPY(blah) do {							\
    if (ty->ht_type.tp_as_##blah) {					\
      memcpy(&ty->as_##blah,						\
	     ty->ht_type.tp_as_##blah,					\
	     sizeof(ty->as_##blah));					\
      ty->ht_type.tp_as_##blah = &ty->as_##blah;			\
    }									\
  } while (0)
  COPY(number);
  COPY(sequence);
  COPY(mapping);
  COPY(buffer);
#undef COPY
  if (name)
    ty->ht_name = TEXT_FROMSTR(name);
  else if (ty->ht_type.tp_name)
    ty->ht_name = TEXT_FROMSTR(ty->ht_type.tp_name);
  else
    ty->ht_name = 0;
  if (ty->ht_name)
    ty->ht_type.tp_name = TEXT_STR(ty->ht_name);
  ty->ht_slots = 0;
  (void)PyObject_INIT(&ty->ht_type, metaty);
  Py_INCREF(metaty);
  return (ty);
}

void typeready(PyTypeObject *ty)
{
  PyType_Ready(ty);
  PyDict_SetItemString(ty->tp_dict, "__module__", modname);
}

PyTypeObject *inittype(const PyTypeObject *tyskel,
		       PyTypeObject *base, PyTypeObject *meta)
{
  PyTypeObject *ty = newtype(meta, tyskel, 0);
  if (base) { ty->tp_base = base; Py_INCREF(base); }
  ty->tp_flags |= Py_TPFLAGS_HEAPTYPE;
  typeready(ty);
  return (ty);
}

/*----- Populating modules ------------------------------------------------*/

PyObject *mkexc(PyObject *mod, PyObject *base,
		const char *name, const PyMethodDef *mm)
{
  PyObject *nameobj = 0;
  PyObject *dict = 0;
  PyObject *exc = 0;
  PyObject *func = 0;
  PyObject *meth = 0;

  if ((dict = PyDict_New()) == 0) goto fail;

  if (mm) {
    while (mm->ml_name) {
      if ((func = PyCFunction_NewEx((/*unconst*/ PyMethodDef *)mm,
				    0, mod)) == 0 ||
	  (meth = PyMethod_New(func, 0, exc)) == 0 ||
	  PyDict_SetItemString(dict, mm->ml_name, meth))
	goto fail;
      Py_DECREF(func); func = 0;
      Py_DECREF(meth); meth = 0;
      mm++;
    }
  }

  if ((nameobj = TEXT_FORMAT("%s.%s", PyModule_GetName(mod), name)) == 0 ||
      (exc = PyErr_NewException(TEXT_STR(nameobj), base, dict)) == 0)
    goto fail;

done:
  Py_XDECREF(nameobj);
  Py_XDECREF(dict);
  return (exc);

fail:
  Py_XDECREF(exc);
  Py_XDECREF(func);
  Py_XDECREF(meth);
  exc = 0;
  goto done;
}

void setconstants(PyObject *mod, const struct nameval *c)
{
  PyObject *x;
  unsigned long u;

  while (c->name) {
    u = c->value;
    if (u <= LONG_MAX) x = PyInt_FromLong(u);
    else if (c->f&CF_SIGNED) x = PyInt_FromLong(-1 - (long)(ULONG_MAX - u));
    else x = PyLong_FromUnsignedLong(u);
    PyModule_AddObject(mod, (/*unconst*/ char *)c->name, x);
    c++;
  }
}

/*----- Submodules --------------------------------------------------------*/

static PyMethodDef *global_methods;
static size_t nmethods, methodsz;

void addmethods(const PyMethodDef *m)
{
  size_t n, want, newsz;

  for (n = 0; m[n].ml_name; n++);
  want = nmethods + n + 1;
  if (want > methodsz) {
    newsz = methodsz ? 2*methodsz : 16;
    while (want > newsz) newsz *= 2;
    if (!global_methods)
      global_methods = PyObject_Malloc(newsz*sizeof(PyMethodDef));
    else
      global_methods = PyObject_Realloc(global_methods,
					newsz*sizeof(PyMethodDef));
    assert(global_methods);
    methodsz = newsz;
  }
  memcpy(global_methods + nmethods, m, n*sizeof(PyMethodDef));
  nmethods += n;
  global_methods[nmethods].ml_name = 0;
}

PyMethodDef *donemethods(void) { return (global_methods); }

/*----- Low-level Python interface ----------------------------------------*/

static PyObject *meth__set_home_module(PyObject *me, PyObject *arg)
{
  PyObject *mod;

  if (!PyArg_ParseTuple(arg, "O!:_set_home_module", &PyModule_Type, &mod))
    return (0);
  Py_XDECREF(home_module); home_module = mod; Py_INCREF(home_module);
  RETURN_NONE;
}

static const PyMethodDef methods[] = {
#define METHNAME(func) meth_##func
  METH	(_set_home_module, "_set_home_module(MOD)")
#undef METHNAME
  { 0 }
};

void pyke_core_pyinit(void) { addmethods(methods); }
void pyke_core_pyinsert(PyObject *mod) { ; }

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
c1756f78 MW	1	/* --c--
	2	*
	3	* Pyke: the Python Kit for Extensions
	4	*
	5	* (c) 2019 Straylight/Edgeware
	6	*/
	7
	8	/----- Licensing notice --------------------------------------------------
	9	*
	10	* This file is part of Pyke: the Python Kit for Extensions.
	11	*
	12	* Pyke is free software: you can redistribute it and/or modify it under
	13	* the terms of the GNU General Public License as published by the Free
	14	* Software Foundation; either version 2 of the License, or (at your
	15	* option) any later version.
	16	*
	17	* Pyke is distributed in the hope that it will be useful, but WITHOUT
	18	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	19	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	20	* for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with Pyke. If not, write to the Free Software Foundation, Inc.,
	24	* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	25	*/
	26
	27	/----- Header files ------------------------------------------------------/
	28
	29	#include "pyke.h"
	30
	31	/----- External variables ------------------------------------------------/
	32
	33	PyObject *modname;
	34	PyObject *home_module;
	35
	36	/----- Conversions -------------------------------------------------------/
	37
	38	PyObject *getulong(unsigned long w)
	39	{
	40	if (w <= LONG_MAX) return (PyInt_FromLong(w));
	41	else return (PyLong_FromUnsignedLong(w));
	42	}
	43
	44	PyObject *getbool(int b)
	45	{ if (b) RETURN_TRUE; else RETURN_FALSE; }
	46
	47	int convulong(PyObject o, void pp)
	48	{
c1756f78 MW	49	unsigned long *p = pp;
	50	PyObject *t;
	51
	52	if (!o) VALERR("can't delete");
	53	if (PyInt_Check(o)) {
83a72c0d	54	long i = PyInt_AS_LONG(o);
c1756f78 MW	55	if (i < 0) VALERR("must be nonnegative");
c1756f78 MW	56	*p = i;
83a72c0d MW	57	} else
83a72c0d MW	58	{
c1756f78 MW	59	if ((t = PyNumber_Long(o)) == 0) goto end;
	60	*p = PyLong_AsUnsignedLong(t);
	61	Py_DECREF(t);
	62	if (PyErr_Occurred()) goto end;
	63	}
	64	return (1);
	65	end:
	66	return (0);
	67	}
	68
	69	int convuint(PyObject o, void pp)
	70	{
	71	unsigned long u;
	72	unsigned *p = pp;
	73
	74	if (!convulong(o, &u)) goto end;
	75	if (u > UINT_MAX) VALERR("out of range");
	76	*p = u;
	77	return (1);
	78	end:
	79	return (0);
	80	}
	81
	82	int convszt(PyObject o, void pp)
	83	{
	84	unsigned long u;
	85	size_t *p = pp;
	86
	87	if (!convulong(o, &u)) goto end;
	88	if (u > ~(size_t)0) VALERR("out of range");
	89	*p = u;
	90	return (1);
	91	end:
	92	return (0);
	93	}
	94
	95	int convbool(PyObject o, void pp)
	96	{
	97	if (!o) VALERR("can't delete");
	98	(int )pp = PyObject_IsTrue(o);
	99	return (1);
	100	end:
	101	return (0);
	102	}
	103
7e18a150 MW	104	int convbin(PyObject o, void pp)
	105	{
	106	struct bin *r = pp;
	107
e0a7dece MW	108	if (BIN_CHECK(o)) {
	109	r->p = BIN_PTR(o);
	110	r->sz = BIN_LEN(o);
7e18a150 MW	111	return (1);
	112	}
	113	if (PyUnicode_Check(o)) {
	114	o = _PyUnicode_AsDefaultEncodedString(o, 0);
	115	if (!o) return (0);
	116	r->p = PyString_AS_STRING(o);
	117	r->sz = PyString_GET_SIZE(o);
	118	return (1);
	119	}
	120	return (PyObject_AsReadBuffer(o, &r->p, &r->sz) ? 0 : 1);
	121	}
	122
c1756f78 MW	123	/----- Miscellaneous utilities -------------------------------------------/
	124
	125	PyObject abstract_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	126	{
	127	PyErr_SetString(PyExc_TypeError, "can't instantiate this class");
	128	return (0);
	129	}
	130
1c0e9c88 MW	131	PyObject *enrich_compare(int op, int cmp)
	132	{
	133	int r = -1;
	134
	135	switch (op) {
	136	case Py_LT: r = cmp < 0; break;
	137	case Py_LE: r = cmp <= 0; break;
	138	case Py_EQ: r = cmp == 0; break;
	139	case Py_NE: r = cmp != 0; break;
	140	case Py_GE: r = cmp >= 0; break;
	141	case Py_GT: r = cmp > 0; break;
	142	default: assert(0);
	143	}
	144	return (getbool(r));
	145	}
	146
c1756f78 MW	147	/----- Saving and restoring exceptions ----------------------------------/
	148
	149	void report_lost_exception_v(struct excinfo *exc,
	150	const char *why, va_list ap)
	151	{
	152	PyObject *hookfn = 0;
	153	PyObject *whyobj = 0;
	154	PyObject *obj = 0;
	155
	156	/* Make sure we start out without a pending exception, or this will get
	157	* really confusing.
	158	*/
	159	assert(!PyErr_Occurred());
	160
	161	/* Format the explanation. */
e0a7dece	162	if (why) whyobj = TEXT_VFORMAT(why, ap);
c1756f78 MW	163	else { whyobj = Py_None; Py_INCREF(whyobj); }
	164
	165	/* Find our home module's `lostexchook' function. This won't work if
	166	* there's no module, or the function isn't defined, or it's `None'.
	167	*/
	168	if (!home_module) goto sys;
	169	hookfn = PyObject_GetAttrString(home_module, "lostexchook");
	170	if (hookfn == Py_None) goto sys;
	171	else if (hookfn) ;
	172	else if (!PyErr_ExceptionMatches(PyExc_AttributeError)) goto ouch;
	173	else { PyErr_Clear(); goto sys; }
	174
	175	/* Call the hook function. */
	176	obj = PyObject_CallFunction(hookfn, "(OOOO)",
	177	whyobj, exc->ty, exc->val, exc->tb);
	178	if (!obj) goto ouch;
	179	goto end;
	180
	181	/* Something went wrong reporting the problem. */
	182	ouch:
	183	PySys_WriteStderr("\n!!! FAILURE REPORTING LOST EXCEPTION\n");
	184	PyErr_Print();
	185	/* drop through... */
	186
	187	/* There was no hook, so try to do something sensible using
	188	* `sys.excepthook'.
	189	*/
	190	sys:
e0a7dece	191	PySys_WriteStderr("\n!!! LOST EXCEPTION: %s\n", TEXT_PTR(whyobj));
c1756f78 MW	192	RESTORE_EXCINFO(exc);
	193	PyErr_Print();
	194	/* drop through... */
	195
	196	/* Clean up afterwards. */
	197	end:
	198	Py_XDECREF(hookfn);
	199	Py_XDECREF(whyobj);
	200	Py_XDECREF(obj);
	201	}
	202
	203	void report_lost_exception(struct excinfo exc, const char why, ...)
	204	{
	205	va_list ap;
	206
	207	va_start(ap, why);
	208	report_lost_exception_v(exc, why, ap);
	209	va_end(ap);
	210	}
	211
	212	void stash_exception(struct excinfo exc, const char why, ...)
	213	{
	214	va_list ap;
	215	struct excinfo stash;
	216
	217	if (!exc->ty)
	218	STASH_EXCINFO(exc);
	219	else {
	220	va_start(ap, why);
	221	STASH_EXCINFO(&stash);
	222	report_lost_exception_v(&stash, why, ap);
	223	va_end(ap);
	224	}
	225	}
	226
	227	void restore_exception(struct excinfo exc, const char why, ...)
	228	{
	229	va_list ap;
	230	struct excinfo stash;
	231
	232	if (!PyErr_Occurred())
	233	RESTORE_EXCINFO(exc);
	234	else {
	235	va_start(ap, why);
	236	STASH_EXCINFO(&stash);
	237	report_lost_exception_v(exc, why, ap);
	238	RESTORE_EXCINFO(&stash);
	239	va_end(ap);
	240	}
	241	}
	242
	243	/----- Type definitions --------------------------------------------------/
	244
	245	static const PyTypeObject emptytype = { 0 };
	246
	247	void newtype(PyTypeObject metaty,
	248	const PyTypeObject *skel,
	249	const char *name)
	250	{
	251	PyHeapTypeObject *ty =
	252	(PyHeapTypeObject *)_PyObject_GC_Malloc(_PyObject_VAR_SIZE(metaty, 0));
	253	if (!skel) skel = &emptytype;
	254	memcpy(ty, skel, sizeof(*skel));
c1756f78 MW	255	#define COPY(blah) do { \
	256	if (ty->ht_type.tp_as_##blah) { \
	257	memcpy(&ty->as_##blah, \
	258	ty->ht_type.tp_as_##blah, \
	259	sizeof(ty->as_##blah)); \
	260	ty->ht_type.tp_as_##blah = &ty->as_##blah; \
	261	} \
	262	} while (0)
	263	COPY(number);
	264	COPY(sequence);
	265	COPY(mapping);
	266	COPY(buffer);
	267	#undef COPY
	268	if (name)
e0a7dece	269	ty->ht_name = TEXT_FROMSTR(name);
c1756f78	270	else if (ty->ht_type.tp_name)
e0a7dece MW	271	ty->ht_name = TEXT_FROMSTR(ty->ht_type.tp_name);
	272	else
	273	ty->ht_name = 0;
c1756f78	274	if (ty->ht_name)
e0a7dece	275	ty->ht_type.tp_name = TEXT_STR(ty->ht_name);
1b026fd1	276	ty->ht_slots = 0;
c1756f78 MW	277	(void)PyObject_INIT(&ty->ht_type, metaty);
	278	Py_INCREF(metaty);
	279	return (ty);
	280	}
	281
	282	void typeready(PyTypeObject *ty)
	283	{
	284	PyType_Ready(ty);
	285	PyDict_SetItemString(ty->tp_dict, "__module__", modname);
	286	}
	287
747ddb1b MW	288	PyTypeObject inittype(const PyTypeObject tyskel,
747ddb1b MW	289	PyTypeObject base, PyTypeObject meta)
c1756f78 MW	290	{
c1756f78 MW	291	PyTypeObject *ty = newtype(meta, tyskel, 0);
747ddb1b	292	if (base) { ty->tp_base = base; Py_INCREF(base); }
c1756f78 MW	293	ty->tp_flags \|= Py_TPFLAGS_HEAPTYPE;
	294	typeready(ty);
	295	return (ty);
	296	}
	297
	298	/----- Populating modules ------------------------------------------------/
	299
	300	PyObject mkexc(PyObject mod, PyObject *base,
87fa2d56	301	const char name, const PyMethodDef mm)
c1756f78 MW	302	{
	303	PyObject *nameobj = 0;
	304	PyObject *dict = 0;
	305	PyObject *exc = 0;
	306	PyObject *func = 0;
	307	PyObject *meth = 0;
	308
	309	if ((dict = PyDict_New()) == 0) goto fail;
	310
	311	if (mm) {
	312	while (mm->ml_name) {
87fa2d56 MW	313	if ((func = PyCFunction_NewEx((/unconst/ PyMethodDef *)mm,
87fa2d56 MW	314	0, mod)) == 0 \|\|
c1756f78 MW	315	(meth = PyMethod_New(func, 0, exc)) == 0 \|\|
	316	PyDict_SetItemString(dict, mm->ml_name, meth))
	317	goto fail;
	318	Py_DECREF(func); func = 0;
	319	Py_DECREF(meth); meth = 0;
	320	mm++;
	321	}
	322	}
	323
e0a7dece MW	324	if ((nameobj = TEXT_FORMAT("%s.%s", PyModule_GetName(mod), name)) == 0 \|\|
e0a7dece MW	325	(exc = PyErr_NewException(TEXT_STR(nameobj), base, dict)) == 0)
c1756f78 MW	326	goto fail;
	327
	328	done:
	329	Py_XDECREF(nameobj);
	330	Py_XDECREF(dict);
	331	return (exc);
	332
	333	fail:
	334	Py_XDECREF(exc);
	335	Py_XDECREF(func);
	336	Py_XDECREF(meth);
	337	exc = 0;
	338	goto done;
	339	}
	340
	341	void setconstants(PyObject mod, const struct nameval c)
	342	{
	343	PyObject *x;
	344	unsigned long u;
	345
	346	while (c->name) {
	347	u = c->value;
	348	if (u <= LONG_MAX) x = PyInt_FromLong(u);
	349	else if (c->f&CF_SIGNED) x = PyInt_FromLong(-1 - (long)(ULONG_MAX - u));
	350	else x = PyLong_FromUnsignedLong(u);
	351	PyModule_AddObject(mod, (/unconst/ char *)c->name, x);
	352	c++;
	353	}
	354	}
	355
	356	/----- Submodules --------------------------------------------------------/
	357
	358	static PyMethodDef *global_methods;
	359	static size_t nmethods, methodsz;
	360
	361	void addmethods(const PyMethodDef *m)
	362	{
	363	size_t n, want, newsz;
	364
	365	for (n = 0; m[n].ml_name; n++);
	366	want = nmethods + n + 1;
	367	if (want > methodsz) {
	368	newsz = methodsz ? 2*methodsz : 16;
	369	while (want > newsz) newsz *= 2;
	370	if (!global_methods)
	371	global_methods = PyObject_Malloc(newsz*sizeof(PyMethodDef));
	372	else
	373	global_methods = PyObject_Realloc(global_methods,
	374	newsz*sizeof(PyMethodDef));
	375	assert(global_methods);
	376	methodsz = newsz;
	377	}
	378	memcpy(global_methods + nmethods, m, n*sizeof(PyMethodDef));
	379	nmethods += n;
	380	global_methods[nmethods].ml_name = 0;
	381	}
	382
	383	PyMethodDef *donemethods(void) { return (global_methods); }
	384
	385	/----- Low-level Python interface ----------------------------------------/
	386
	387	static PyObject meth__set_home_module(PyObject me, PyObject *arg)
	388	{
	389	PyObject *mod;
390
391	if (!PyArg_ParseTuple(arg, "O!:_set_home_module", &PyModule_Type, &mod))
392	return (0);
393	Py_XDECREF(home_module); home_module = mod; Py_INCREF(home_module);
394	RETURN_NONE;
395	}
396
397	static const PyMethodDef methods[] = {
398	#define METHNAME(func) meth_##func
399	METH (_set_home_module, "_set_home_module(MOD)")
400	#undef METHNAME
401	{ 0 }
402	};
403
404	void pyke_core_pyinit(void) { addmethods(methods); }
405	void pyke_core_pyinsert(PyObject *mod) { ; }
406
407	/----- That's all, folks -------------------------------------------------/