[catacomb-python] / buffer.c

/* -*-c-*-
 *
 * Reading and writing buffers of stuff
 *
 * (c) 2005 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------*
 *
 * This file is part of the Python interface to Catacomb.
 *
 * Catacomb/Python 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.
 *
 * Catacomb/Python 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 Catacomb/Python; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

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

#include "catacomb-python.h"

/*----- Data structures ---------------------------------------------------*/

typedef struct buf_pyobj {
  PyObject_HEAD
  buf b;
  PyObject *sub;
} buf_pyobj;

static PyTypeObject *rbuf_pytype, *wbuf_pytype;
#define RBUF_PYCHECK(o) PyObject_TypeCheck((o), rbuf_pytype)
#define WBUF_PYCHECK(o) PyObject_TypeCheck((o), wbuf_pytype)
#define BUF_B(o) (&((buf_pyobj *)(o))->b)
#define BUF_SUB(o) (((buf_pyobj *)(o))->sub)

/*----- Exceptions --------------------------------------------------------*/

static PyObject *buferr;

#define BUFERR() do { PyErr_SetNone(buferr); goto end; } while (0)

/*----- Read buffers ------------------------------------------------------*/

static PyObject *rbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
{
  char *p, *q;
  Py_ssize_t n;
  buf_pyobj *me = 0;
  static char *kwlist[] = { "data", 0 };

  if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n))
    goto end;
  q = xmalloc(n);
  memcpy(q, p, n);
  me = (buf_pyobj *)ty->tp_alloc(ty, 0);
  me->sub = 0;
  buf_init(&me->b, q, n);
end:
  return ((PyObject *)me);
}

static void buf_pydealloc(PyObject *me)
{
  if (BUF_SUB(me))
    Py_DECREF(BUF_SUB(me));
  else
    xfree(BBASE(BUF_B(me)));
  FREEOBJ(me);
}

static Py_ssize_t rbuf_pysegcount(PyObject *me, Py_ssize_t *nn)
  { if (nn) *nn = BSZ(BUF_B(me)); return (1); }

static Py_ssize_t rbuf_pyreadbuf(PyObject *me, Py_ssize_t seg, void **q)
  { assert(seg == 0); *q = BCUR(BUF_B(me)); return (BLEFT(BUF_B(me))); }

static PyObject *rbmeth_skip(PyObject *me, PyObject *arg)
{
  size_t n;

  if (!PyArg_ParseTuple(arg, "O&:skip", convszt, &n)) goto end;
  if (!buf_get(BUF_B(me), n)) BUFERR();
  RETURN_ME;
end:
  return (0);
}

static PyObject *rbmeth_get(PyObject *me, PyObject *arg)
{
  void *p;
  size_t n;

  if (!PyArg_ParseTuple(arg, "O&:get", convszt, &n)) goto end;
  if ((p = buf_get(BUF_B(me), n)) == 0) BUFERR();
  return (bytestring_pywrap(p, n));
end:
  return (0);
}

#define RBMETH_GETU_(n, W, w)						\
  static PyObject *rbmeth_getu##w(PyObject *me, PyObject *arg)		\
  {									\
    uint##n x;								\
    if (!PyArg_ParseTuple(arg, ":getu" #w)) goto end;			\
    if (buf_getu##w(BUF_B(me), &x)) BUFERR();				\
    return (getulong(x));						\
  end:									\
    return (0);								\
  }
DOUINTCONV(RBMETH_GETU_)

#define RBMETH_GETBLK_(n, W, w)						\
  static PyObject *rbmeth_getblk##w(PyObject *me, PyObject *arg)	\
  {									\
    size_t sz;								\
    char *q;								\
    if (!PyArg_ParseTuple(arg, ":getblk" #w)) goto end;			\
    if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0) BUFERR();		\
    return (bytestring_pywrap(q, sz));					\
  end:									\
    return (0);								\
  }
BUF_DOSUFFIXES(RBMETH_GETBLK_)

#define RBMETH_GETBUF_(n, W, w)						\
  static PyObject *rbmeth_getbuf##w(PyObject *me, PyObject *arg)	\
  {									\
    buf_pyobj *b;							\
    buf bb;								\
    if (!PyArg_ParseTuple(arg, ":getbuf" #w)) goto end;			\
    if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR();			\
    b = PyObject_NEW(buf_pyobj, rbuf_pytype);				\
    b->b = bb;								\
    b->sub = me;							\
    Py_INCREF(me);							\
    return ((PyObject *)b);						\
  end:									\
    return (0);								\
  }
BUF_DOSUFFIXES(RBMETH_GETBUF_)

static PyObject *rbmeth_getmp(PyObject *me, PyObject *arg)
{
  mp *x;
  if (!PyArg_ParseTuple(arg, ":getmp")) goto end;
  if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR();
  return (mp_pywrap(x));
end:
  return (0);
}

static PyObject *rbmeth_getgf(PyObject *me, PyObject *arg)
{
  mp *x;
  if (!PyArg_ParseTuple(arg, ":getgf")) goto end;
  if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR();
  return (gf_pywrap(x));
end:
  return (0);
}

static PyObject *rbmeth_getecpt(PyObject *me, PyObject *arg, PyObject *kw)
{
  PyObject *cobj = Py_None;
  static char *kwlist[] = { "curve", 0 };
  ec pt = EC_INIT;
  if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:getecpt", kwlist, &cobj))
    goto end;
  if (cobj == Py_None) cobj = (PyObject *)ecpt_pytype;
  if (!PyType_Check(cobj) ||
      !PyType_IsSubtype((PyTypeObject *)cobj, ecpt_pytype))
    TYERR("expected elliptic curve type");
  if (buf_getec(BUF_B(me), &pt)) BUFERR();
  return (ecpt_pywrapout(cobj, &pt));
end:
  return (0);
}

static PyObject *rbmeth_getecptraw(PyObject *me, PyObject *arg)
{
  PyTypeObject *cobj = ecpt_pytype;
  ec pt = EC_INIT;
  if (!PyArg_ParseTuple(arg, "O!:getecptraw", eccurve_pytype, &cobj))
    goto end;
  if (ec_getraw(ECCURVE_C(cobj), BUF_B(me), &pt)) BUFERR();
  return (ecpt_pywrapout(cobj, &pt));
end:
  return (0);
}

static PyObject *rbmeth_getge(PyObject *me, PyObject *arg)
{
  PyObject *gobj;
  ge *x = 0;
  if (!PyArg_ParseTuple(arg, "O!:getge", group_pytype, &gobj)) goto end;
  x = G_CREATE(GROUP_G(gobj));
  if (G_FROMBUF(GROUP_G(gobj), BUF_B(me), x)) BUFERR();
  return (ge_pywrap(gobj, x));
end:
  if (x) G_DESTROY(GROUP_G(gobj), x);
  return (0);
}

static PyObject *rbmeth_getgeraw(PyObject *me, PyObject *arg)
{
  PyObject *gobj;
  ge *x = 0;
  if (!PyArg_ParseTuple(arg, "O!:getgeraw", group_pytype, &gobj)) goto end;
  x = G_CREATE(GROUP_G(gobj));
  if (G_FROMRAW(GROUP_G(gobj), BUF_B(me), x)) BUFERR();
  return (ge_pywrap(gobj, x));
end:
  if (x) G_DESTROY(GROUP_G(gobj), x);
  return (0);
}

static PyObject *rbget_size(PyObject *me, void *hunoz)
  { return (PyInt_FromLong(BSZ(BUF_B(me)))); }
static PyObject *rbget_left(PyObject *me, void *hunoz)
  { return (PyInt_FromLong(BLEFT(BUF_B(me)))); }
static PyObject *rbget_endp(PyObject *me, void *hunoz)
  { return (getbool(!BLEFT(BUF_B(me)))); }
static PyObject *rbget_offset(PyObject *me, void *hunoz)
  { return (PyInt_FromLong(BLEN(BUF_B(me)))); }
static int rbset_offset(PyObject *me, PyObject *x, void *hunoz)
{
  size_t n;
  if (!x) NIERR("__del__");
  if (!convszt(x, &n)) goto end;
  if (n > BSZ(BUF_B(me))) VALERR("out of range");
  BCUR(BUF_B(me)) = BBASE(BUF_B(me)) + n;
  return (0);
end:
  return (-1);
}

static PyGetSetDef rbuf_pygetset[] = {
#define GETSETNAME(op, name) rb##op##_##name
  GET	(size,			"RBUF.size -> SIZE")
  GET	(left,			"RBUF.left -> REMAINDER")
  GET	(endp,			"RBUF.endp -> BOOL")
  GETSET(offset,		"RBUF.offset -> OFFSET")
#undef GETSETNAME
  { 0 }
};

static PyMethodDef rbuf_pymethods[] = {
#define METHNAME(func) rbmeth_##func
  METH	(skip,			"RBUF.skip(N)")
  METH	(get,			"RBUF.get(N) -> BYTES")
#define RBMETH_DECL_GETU_(n, W, w)					\
    METH(getu##w, "RBUF.getu" #w "() -> INT")
  DOUINTCONV(RBMETH_DECL_GETU_)
#define RBMETH_DECL_GETBLK_(n, W, w)					\
    METH(getblk##w, "RBUF.getblk" #w "() -> INT")
  BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
#define RBMETH_DECL_GETBUF_(n, W, w)					\
    METH(getbuf##w, "RBUF.getbuf" #w "() -> INT")
  BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
  METH	(getmp,			"RBUF.getmp() -> X")
  METH	(getgf,			"RBUF.getgf() -> X")
  KWMETH(getecpt,		"RBUF.getecpt(curve = None) -> P")
  METH	(getecptraw,		"RBUF.getecptraw(CURVE) -> P")
  METH	(getge,			"RBUF.getge(GROUP) -> X")
  METH	(getgeraw,		"RBUF.getgeraw(GROUP) -> X")
#undef METHNAME
  { 0 }
};

static PyBufferProcs rbuf_pybuffer = {
  rbuf_pyreadbuf,			/* @bf_getreadbuffer@ */
  0,					/* @bf_getwritebuffer@ */
  rbuf_pysegcount,			/* @bf_getsegcount@ */
  0					/* @bf_getcharbuffer@ */
};

static PyTypeObject rbuf_pytype_skel = {
  PyObject_HEAD_INIT(0) 0,		/* Header */
  "ReadBuffer",				/* @tp_name@ */
  sizeof(buf_pyobj),			/* @tp_basicsize@ */
  0,					/* @tp_itemsize@ */

  buf_pydealloc,			/* @tp_dealloc@ */
  0,					/* @tp_print@ */
  0,					/* @tp_getattr@ */
  0,					/* @tp_setattr@ */
  0,					/* @tp_compare@ */
  0,					/* @tp_repr@ */
  0,					/* @tp_as_number@ */
  0,					/* @tp_as_sequence@ */
  0,					/* @tp_as_mapping@ */
  0,					/* @tp_hash@ */
  0,					/* @tp_call@ */
  0,					/* @tp_str@ */
  0,					/* @tp_getattro@ */
  0,					/* @tp_setattro@ */
  &rbuf_pybuffer,			/* @tp_as_buffer@ */
  Py_TPFLAGS_DEFAULT |			/* @tp_flags@ */
    Py_TPFLAGS_BASETYPE,

  /* @tp_doc@ */
  "A read buffer.",

  0,					/* @tp_traverse@ */
  0,					/* @tp_clear@ */
  0,					/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternext@ */
  rbuf_pymethods,			/* @tp_methods@ */
  0,					/* @tp_members@ */
  rbuf_pygetset,			/* @tp_getset@ */
  0,					/* @tp_base@ */
  0,					/* @tp_dict@ */
  0,					/* @tp_descr_get@ */
  0,					/* @tp_descr_set@ */
  0,					/* @tp_dictoffset@ */
  0,					/* @tp_init@ */
  PyType_GenericAlloc,			/* @tp_alloc@ */
  rbuf_pynew,				/* @tp_new@ */
  0,					/* @tp_free@ */
  0					/* @tp_is_gc@ */
};

/*----- Write buffers -----------------------------------------------------*/

static void ensure(PyObject *me, size_t n)
{
  buf *b = BUF_B(me);

  if (BLEFT(b) < n) {
    size_t nn = BSZ(b);
    octet *p;
    size_t want = BLEN(b) + n;
    while (nn < want) nn <<= 1;
    p = xrealloc(BBASE(b), nn, BSZ(b));
    BCUR(b) = p + BLEN(b);
    BLIM(b) = p + nn;
    BBASE(b) = p;
  }
}

static PyObject *wbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
{
  char *p;
  size_t n = 64;
  buf_pyobj *me = 0;
  static char *kwlist[] = { "size", 0 };

  if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", kwlist,
				   convszt, &n))
    goto end;
  me = (buf_pyobj *)ty->tp_alloc(ty, 0);
  p = xmalloc(n);
  me->sub = 0;
  buf_init(&me->b, p, n);
end:
  return ((PyObject *)me);
}

static Py_ssize_t wbuf_pysegcount(PyObject *me, Py_ssize_t *nn)
  { if (nn) *nn = BLEN(BUF_B(me)); return (1); }

static Py_ssize_t wbuf_pyreadbuf(PyObject *me, Py_ssize_t seg, void **q)
  { assert(seg == 0); *q = BBASE(BUF_B(me)); return (BLEN(BUF_B(me))); }

static PyObject *wbmeth_zero(PyObject *me, PyObject *arg)
{
  void *p;
  size_t n;
  if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
  ensure(me, n);
  p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
  memset(p, 0, n);
  RETURN_ME;
}

static PyObject *wbmeth_put(PyObject *me, PyObject *arg)
{
  void *p;
  Py_ssize_t n;
  if (!PyArg_ParseTuple(arg, "s#:put", &p, &n)) return (0);
  ensure(me, n);
  buf_put(BUF_B(me), p, n); assert(BOK(BUF_B(m)));
  RETURN_ME;
}

#define WBMETH_PUTU_(n, W, w)						\
  static PyObject *wbmeth_putu##w(PyObject *me, PyObject *arg)		\
  {									\
    uint##n i;								\
    if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0);	\
    ensure(me, SZ_##n);							\
    buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me)));			\
    RETURN_ME;								\
  }
DOUINTCONV(WBMETH_PUTU_)

#define SZ_z 1
#define WBMETH_PUTBLK_(n, W, w)						\
  static PyObject *wbmeth_putblk##w(PyObject *me, PyObject *arg)	\
  {									\
    char *p;								\
    Py_ssize_t sz;							\
    if (!PyArg_ParseTuple(arg, "s#:putblk" #w, &p, &sz)) return (0);	\
    ensure(me, sz + SZ_##n);						\
    buf_putmem##w(BUF_B(me), p, sz); assert(BOK(BUF_B(me)));		\
    RETURN_ME;								\
  }
BUF_DOSUFFIXES(WBMETH_PUTBLK_)

static PyObject *wbmeth_putmp(PyObject *me, PyObject *arg)
{
  mp *x = 0;
  if (!PyArg_ParseTuple(arg, "O&:putmp", convmp, &x)) return (0);
  ensure(me, mp_octets(x) + 2);
  buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
  RETURN_ME;
}

static PyObject *wbmeth_putgf(PyObject *me, PyObject *arg)
{
  mp *x = 0;
  if (!PyArg_ParseTuple(arg, "O&:putgf", convgf, &x)) return (0);
  ensure(me, mp_octets(x) + 2);
  buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
  MP_DROP(x);
  RETURN_ME;
}

static PyObject *wbmeth_putecpt(PyObject *me, PyObject *arg)
{
  ec pt = EC_INIT;
  if (!PyArg_ParseTuple(arg, "O&:putecpt", convecpt, &pt)) return (0);
  if (EC_ATINF(&pt)) ensure(me, 2);
  else ensure(me, 4 + mp_octets(pt.x) + mp_octets(pt.y));
  buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
  EC_DESTROY(&pt);
  RETURN_ME;
}

static PyObject *wbmeth_putecptraw(PyObject *me, PyObject *arg)
{
  PyObject *ptobj;
  ec pt = EC_INIT;
  if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
    return (0);
  EC_OUT(ECPT_C(ptobj), &pt, ECPT_P(ptobj));
  ensure(me, ECPT_C(ptobj)->f->noctets * 2 + 1);
  ec_putraw(ECPT_C(ptobj), BUF_B(me), &pt); assert(BOK(BUF_B(me)));
  EC_DESTROY(&pt);
  RETURN_ME;
}

static PyObject *wbmeth_putge(PyObject *me, PyObject *arg)
{
  PyObject *geobj;
  if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
  ensure(me, GE_G(geobj)->noctets);
  G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
  RETURN_ME;
}

static PyObject *wbmeth_putgeraw(PyObject *me, PyObject *arg)
{
  PyObject *geobj;
  if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
  ensure(me, GE_G(geobj)->noctets);
  G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
  RETURN_ME;
}

static PyObject *wbget_size(PyObject *me, void *hunoz)
  { return (PyInt_FromLong(BLEN(BUF_B(me)))); }

static PyGetSetDef wbuf_pygetset[] = {
#define GETSETNAME(op, name) wb##op##_##name
  GET	(size,			"WBUF.size -> SIZE")
#undef GETSETNAME
  { 0 }
};

static PyMethodDef wbuf_pymethods[] = {
#define METHNAME(func) wbmeth_##func
  METH	(zero,			"WBUF.zero(N)")
  METH	(put,			"WBUF.put(BYTES)")
#define WBMETH_DECL_PUTU_(n, W, w)					\
    METH(putu##w, "WBUF.putu" #w "(INT)")
  DOUINTCONV(WBMETH_DECL_PUTU_)
#define WBMETH_DECL_PUTBLK_(n, W, w)					\
    METH(putblk##w, "WBUF.putblk" #w "(BYTES)")
  BUF_DOSUFFIXES(WBMETH_DECL_PUTBLK_)
  METH	(putmp,			"WBUF.putmp(X)")
  METH	(putgf,			"WBUF.putgf(X)")
  KWMETH(putecpt,		"WBUF.putecpt(P)")
  METH	(putecptraw,		"WBUF.putecptraw(P)")
  METH	(putge,			"WBUF.putge(X)")
  METH	(putgeraw,		"WBUF.putgeraw(X)")
#undef METHNAME
  { 0 }
};

static PyBufferProcs wbuf_pybuffer = {
  wbuf_pyreadbuf,			/* @bf_getreadbuffer@ */
  0,					/* @bf_getwritebuffer@ */
  wbuf_pysegcount,			/* @bf_getsegcount@ */
  0					/* @bf_getcharbuffer@ */
};

static PyTypeObject wbuf_pytype_skel = {
  PyObject_HEAD_INIT(0) 0,		/* Header */
  "WriteBuffer",			/* @tp_name@ */
  sizeof(buf_pyobj),			/* @tp_basicsize@ */
  0,					/* @tp_itemsize@ */

  buf_pydealloc,			/* @tp_dealloc@ */
  0,					/* @tp_print@ */
  0,					/* @tp_getattr@ */
  0,					/* @tp_setattr@ */
  0,					/* @tp_compare@ */
  0,					/* @tp_repr@ */
  0,					/* @tp_as_number@ */
  0,					/* @tp_as_sequence@ */
  0,					/* @tp_as_mapping@ */
  0,					/* @tp_hash@ */
  0,					/* @tp_call@ */
  0,					/* @tp_str@ */
  0,					/* @tp_getattro@ */
  0,					/* @tp_setattro@ */
  &wbuf_pybuffer,			/* @tp_as_buffer@ */
  Py_TPFLAGS_DEFAULT |			/* @tp_flags@ */
    Py_TPFLAGS_BASETYPE,

  /* @tp_doc@ */
  "A write buffer.",

  0,					/* @tp_traverse@ */
  0,					/* @tp_clear@ */
  0,					/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternext@ */
  wbuf_pymethods,			/* @tp_methods@ */
  0,					/* @tp_members@ */
  wbuf_pygetset,			/* @tp_getset@ */
  0,					/* @tp_base@ */
  0,					/* @tp_dict@ */
  0,					/* @tp_descr_get@ */
  0,					/* @tp_descr_set@ */
  0,					/* @tp_dictoffset@ */
  0,					/* @tp_init@ */
  PyType_GenericAlloc,			/* @tp_alloc@ */
  wbuf_pynew,				/* @tp_new@ */
  0,					/* @tp_free@ */
  0					/* @tp_is_gc@ */
};

/*----- Initialization ----------------------------------------------------*/

void buffer_pyinit(void)
{
  INITTYPE(rbuf, root);
  INITTYPE(wbuf, root);
}

void buffer_pyinsert(PyObject *mod)
{
  INSEXC("BufferError", buferr, PyExc_Exception, 0);
  INSERT("ReadBuffer", rbuf_pytype);
  INSERT("WriteBuffer", wbuf_pytype);
}

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
46e6ad89	1	/* --c--
46e6ad89	2	*
	3	* Reading and writing buffers of stuff
	4	*
	5	* (c) 2005 Straylight/Edgeware
	6	*/
	7
b2687a0a	8	/----- Licensing notice --------------------------------------------------
46e6ad89	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.
b2687a0a	16	*
46e6ad89	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.
b2687a0a	21	*
46e6ad89	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	/----- Data structures ---------------------------------------------------/
	32
	33	typedef struct buf_pyobj {
	34	PyObject_HEAD
	35	buf b;
0463996f	36	PyObject *sub;
46e6ad89	37	} buf_pyobj;
	38
	39	static PyTypeObject rbuf_pytype, wbuf_pytype;
	40	#define RBUF_PYCHECK(o) PyObject_TypeCheck((o), rbuf_pytype)
	41	#define WBUF_PYCHECK(o) PyObject_TypeCheck((o), wbuf_pytype)
	42	#define BUF_B(o) (&((buf_pyobj *)(o))->b)
0463996f	43	#define BUF_SUB(o) (((buf_pyobj *)(o))->sub)
46e6ad89	44
	45	/----- Exceptions --------------------------------------------------------/
	46
	47	static PyObject *buferr;
	48
	49	#define BUFERR() do { PyErr_SetNone(buferr); goto end; } while (0)
	50
	51	/----- Read buffers ------------------------------------------------------/
	52
	53	static PyObject rbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	54	{
	55	char p, q;
6b54260d	56	Py_ssize_t n;
46e6ad89	57	buf_pyobj *me = 0;
	58	static char *kwlist[] = { "data", 0 };
	59
	60	if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n))
	61	goto end;
46e6ad89	62	q = xmalloc(n);
46e6ad89	63	memcpy(q, p, n);
0463996f	64	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
0463996f	65	me->sub = 0;
46e6ad89	66	buf_init(&me->b, q, n);
	67	end:
	68	return ((PyObject *)me);
	69	}
	70
	71	static void buf_pydealloc(PyObject *me)
0463996f	72	{
	73	if (BUF_SUB(me))
	74	Py_DECREF(BUF_SUB(me));
	75	else
	76	xfree(BBASE(BUF_B(me)));
	77	FREEOBJ(me);
	78	}
46e6ad89	79
3d8f5f7c	80	static Py_ssize_t rbuf_pysegcount(PyObject me, Py_ssize_t nn)
46e6ad89	81	{ if (nn) *nn = BSZ(BUF_B(me)); return (1); }
46e6ad89	82
3d8f5f7c	83	static Py_ssize_t rbuf_pyreadbuf(PyObject me, Py_ssize_t seg, void *q)
f368b46e	84	{ assert(seg == 0); *q = BCUR(BUF_B(me)); return (BLEFT(BUF_B(me))); }
46e6ad89	85
	86	static PyObject rbmeth_skip(PyObject me, PyObject *arg)
	87	{
	88	size_t n;
	89
	90	if (!PyArg_ParseTuple(arg, "O&:skip", convszt, &n)) goto end;
	91	if (!buf_get(BUF_B(me), n)) BUFERR();
	92	RETURN_ME;
	93	end:
	94	return (0);
	95	}
	96
	97	static PyObject rbmeth_get(PyObject me, PyObject *arg)
	98	{
	99	void *p;
	100	size_t n;
	101
	102	if (!PyArg_ParseTuple(arg, "O&:get", convszt, &n)) goto end;
	103	if ((p = buf_get(BUF_B(me), n)) == 0) BUFERR();
	104	return (bytestring_pywrap(p, n));
	105	end:
	106	return (0);
	107	}
	108
	109	#define RBMETH_GETU_(n, W, w) \
	110	static PyObject rbmeth_getu##w(PyObject me, PyObject *arg) \
	111	{ \
	112	uint##n x; \
	113	if (!PyArg_ParseTuple(arg, ":getu" #w)) goto end; \
	114	if (buf_getu##w(BUF_B(me), &x)) BUFERR(); \
fbca05a1	115	return (getulong(x)); \
46e6ad89	116	end: \
	117	return (0); \
	118	}
	119	DOUINTCONV(RBMETH_GETU_)
	120
	121	#define RBMETH_GETBLK_(n, W, w) \
	122	static PyObject rbmeth_getblk##w(PyObject me, PyObject *arg) \
	123	{ \
	124	size_t sz; \
	125	char *q; \
	126	if (!PyArg_ParseTuple(arg, ":getblk" #w)) goto end; \
	127	if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0) BUFERR(); \
	128	return (bytestring_pywrap(q, sz)); \
	129	end: \
	130	return (0); \
	131	}
	132	BUF_DOSUFFIXES(RBMETH_GETBLK_)
	133
0463996f	134	#define RBMETH_GETBUF_(n, W, w) \
	135	static PyObject rbmeth_getbuf##w(PyObject me, PyObject *arg) \
	136	{ \
	137	buf_pyobj *b; \
	138	buf bb; \
	139	if (!PyArg_ParseTuple(arg, ":getbuf" #w)) goto end; \
	140	if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR(); \
	141	b = PyObject_NEW(buf_pyobj, rbuf_pytype); \
	142	b->b = bb; \
	143	b->sub = me; \
	144	Py_INCREF(me); \
	145	return ((PyObject *)b); \
	146	end: \
	147	return (0); \
	148	}
	149	BUF_DOSUFFIXES(RBMETH_GETBUF_)
	150
46e6ad89	151	static PyObject rbmeth_getmp(PyObject me, PyObject *arg)
	152	{
	153	mp *x;
	154	if (!PyArg_ParseTuple(arg, ":getmp")) goto end;
	155	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR();
	156	return (mp_pywrap(x));
	157	end:
	158	return (0);
	159	}
	160
	161	static PyObject rbmeth_getgf(PyObject me, PyObject *arg)
	162	{
	163	mp *x;
	164	if (!PyArg_ParseTuple(arg, ":getgf")) goto end;
	165	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR();
	166	return (gf_pywrap(x));
	167	end:
	168	return (0);
	169	}
	170
	171	static PyObject rbmeth_getecpt(PyObject me, PyObject arg, PyObject kw)
	172	{
	173	PyObject *cobj = Py_None;
	174	static char *kwlist[] = { "curve", 0 };
	175	ec pt = EC_INIT;
	176	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O:getecpt", kwlist, &cobj))
	177	goto end;
	178	if (cobj == Py_None) cobj = (PyObject *)ecpt_pytype;
	179	if (!PyType_Check(cobj) \|\|
	180	!PyType_IsSubtype((PyTypeObject *)cobj, ecpt_pytype))
	181	TYERR("expected elliptic curve type");
	182	if (buf_getec(BUF_B(me), &pt)) BUFERR();
	183	return (ecpt_pywrapout(cobj, &pt));
	184	end:
	185	return (0);
	186	}
b2687a0a	187
46e6ad89	188	static PyObject rbmeth_getecptraw(PyObject me, PyObject *arg)
	189	{
	190	PyTypeObject *cobj = ecpt_pytype;
	191	ec pt = EC_INIT;
	192	if (!PyArg_ParseTuple(arg, "O!:getecptraw", eccurve_pytype, &cobj))
	193	goto end;
	194	if (ec_getraw(ECCURVE_C(cobj), BUF_B(me), &pt)) BUFERR();
	195	return (ecpt_pywrapout(cobj, &pt));
	196	end:
	197	return (0);
	198	}
	199
	200	static PyObject rbmeth_getge(PyObject me, PyObject *arg)
	201	{
	202	PyObject *gobj;
	203	ge *x = 0;
	204	if (!PyArg_ParseTuple(arg, "O!:getge", group_pytype, &gobj)) goto end;
	205	x = G_CREATE(GROUP_G(gobj));
	206	if (G_FROMBUF(GROUP_G(gobj), BUF_B(me), x)) BUFERR();
	207	return (ge_pywrap(gobj, x));
	208	end:
	209	if (x) G_DESTROY(GROUP_G(gobj), x);
	210	return (0);
	211	}
	212
	213	static PyObject rbmeth_getgeraw(PyObject me, PyObject *arg)
	214	{
	215	PyObject *gobj;
	216	ge *x = 0;
	217	if (!PyArg_ParseTuple(arg, "O!:getgeraw", group_pytype, &gobj)) goto end;
	218	x = G_CREATE(GROUP_G(gobj));
	219	if (G_FROMRAW(GROUP_G(gobj), BUF_B(me), x)) BUFERR();
	220	return (ge_pywrap(gobj, x));
	221	end:
	222	if (x) G_DESTROY(GROUP_G(gobj), x);
	223	return (0);
	224	}
	225
	226	static PyObject rbget_size(PyObject me, void *hunoz)
	227	{ return (PyInt_FromLong(BSZ(BUF_B(me)))); }
	228	static PyObject rbget_left(PyObject me, void *hunoz)
	229	{ return (PyInt_FromLong(BLEFT(BUF_B(me)))); }
	230	static PyObject rbget_endp(PyObject me, void *hunoz)
	231	{ return (getbool(!BLEFT(BUF_B(me)))); }
0463996f	232	static PyObject rbget_offset(PyObject me, void *hunoz)
	233	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
	234	static int rbset_offset(PyObject me, PyObject x, void *hunoz)
	235	{
	236	size_t n;
f368b46e	237	if (!x) NIERR("__del__");
0463996f	238	if (!convszt(x, &n)) goto end;
	239	if (n > BSZ(BUF_B(me))) VALERR("out of range");
	240	BCUR(BUF_B(me)) = BBASE(BUF_B(me)) + n;
	241	return (0);
	242	end:
	243	return (-1);
	244	}
46e6ad89	245
	246	static PyGetSetDef rbuf_pygetset[] = {
	247	#define GETSETNAME(op, name) rb##op##_##name
	248	GET (size, "RBUF.size -> SIZE")
	249	GET (left, "RBUF.left -> REMAINDER")
	250	GET (endp, "RBUF.endp -> BOOL")
0463996f	251	GETSET(offset, "RBUF.offset -> OFFSET")
46e6ad89	252	#undef GETSETNAME
	253	{ 0 }
	254	};
	255
	256	static PyMethodDef rbuf_pymethods[] = {
	257	#define METHNAME(func) rbmeth_##func
	258	METH (skip, "RBUF.skip(N)")
	259	METH (get, "RBUF.get(N) -> BYTES")
	260	#define RBMETH_DECL_GETU_(n, W, w) \
	261	METH(getu##w, "RBUF.getu" #w "() -> INT")
	262	DOUINTCONV(RBMETH_DECL_GETU_)
	263	#define RBMETH_DECL_GETBLK_(n, W, w) \
	264	METH(getblk##w, "RBUF.getblk" #w "() -> INT")
	265	BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
0463996f	266	#define RBMETH_DECL_GETBUF_(n, W, w) \
	267	METH(getbuf##w, "RBUF.getbuf" #w "() -> INT")
	268	BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
46e6ad89	269	METH (getmp, "RBUF.getmp() -> X")
	270	METH (getgf, "RBUF.getgf() -> X")
	271	KWMETH(getecpt, "RBUF.getecpt(curve = None) -> P")
	272	METH (getecptraw, "RBUF.getecptraw(CURVE) -> P")
	273	METH (getge, "RBUF.getge(GROUP) -> X")
	274	METH (getgeraw, "RBUF.getgeraw(GROUP) -> X")
	275	#undef METHNAME
	276	{ 0 }
	277	};
	278
	279	static PyBufferProcs rbuf_pybuffer = {
	280	rbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	281	0, /* @bf_getwritebuffer@ */
	282	rbuf_pysegcount, /* @bf_getsegcount@ */
	283	0 /* @bf_getcharbuffer@ */
	284	};
	285
	286	static PyTypeObject rbuf_pytype_skel = {
	287	PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3	288	"ReadBuffer", /* @tp_name@ */
46e6ad89	289	sizeof(buf_pyobj), /* @tp_basicsize@ */
	290	0, /* @tp_itemsize@ */
	291
	292	buf_pydealloc, /* @tp_dealloc@ */
	293	0, /* @tp_print@ */
	294	0, /* @tp_getattr@ */
	295	0, /* @tp_setattr@ */
	296	0, /* @tp_compare@ */
	297	0, /* @tp_repr@ */
	298	0, /* @tp_as_number@ */
	299	0, /* @tp_as_sequence@ */
	300	0, /* @tp_as_mapping@ */
	301	0, /* @tp_hash@ */
	302	0, /* @tp_call@ */
	303	0, /* @tp_str@ */
	304	0, /* @tp_getattro@ */
	305	0, /* @tp_setattro@ */
	306	&rbuf_pybuffer, /* @tp_as_buffer@ */
	307	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	308	Py_TPFLAGS_BASETYPE,
	309
	310	/* @tp_doc@ */
	311	"A read buffer.",
	312
	313	0, /* @tp_traverse@ */
	314	0, /* @tp_clear@ */
	315	0, /* @tp_richcompare@ */
	316	0, /* @tp_weaklistoffset@ */
	317	0, /* @tp_iter@ */
963a6148	318	0, /* @tp_iternext@ */
46e6ad89	319	rbuf_pymethods, /* @tp_methods@ */
	320	0, /* @tp_members@ */
	321	rbuf_pygetset, /* @tp_getset@ */
	322	0, /* @tp_base@ */
	323	0, /* @tp_dict@ */
	324	0, /* @tp_descr_get@ */
	325	0, /* @tp_descr_set@ */
	326	0, /* @tp_dictoffset@ */
	327	0, /* @tp_init@ */
	328	PyType_GenericAlloc, /* @tp_alloc@ */
	329	rbuf_pynew, /* @tp_new@ */
	330	0, /* @tp_free@ */
	331	0 /* @tp_is_gc@ */
	332	};
	333
	334	/----- Write buffers -----------------------------------------------------/
	335
	336	static void ensure(PyObject *me, size_t n)
	337	{
	338	buf *b = BUF_B(me);
	339
	340	if (BLEFT(b) < n) {
	341	size_t nn = BSZ(b);
	342	octet *p;
c4ca600f	343	size_t want = BLEN(b) + n;
46e6ad89	344	while (nn < want) nn <<= 1;
	345	p = xrealloc(BBASE(b), nn, BSZ(b));
	346	BCUR(b) = p + BLEN(b);
	347	BLIM(b) = p + nn;
	348	BBASE(b) = p;
	349	}
	350	}
	351
	352	static PyObject wbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	353	{
	354	char *p;
	355	size_t n = 64;
	356	buf_pyobj *me = 0;
	357	static char *kwlist[] = { "size", 0 };
	358
	359	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O&:new", kwlist,
	360	convszt, &n))
	361	goto end;
	362	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
	363	p = xmalloc(n);
0463996f	364	me->sub = 0;
46e6ad89	365	buf_init(&me->b, p, n);
	366	end:
	367	return ((PyObject *)me);
	368	}
	369
3d8f5f7c	370	static Py_ssize_t wbuf_pysegcount(PyObject me, Py_ssize_t nn)
46e6ad89	371	{ if (nn) *nn = BLEN(BUF_B(me)); return (1); }
46e6ad89	372
3d8f5f7c	373	static Py_ssize_t wbuf_pyreadbuf(PyObject me, Py_ssize_t seg, void *q)
46e6ad89	374	{ assert(seg == 0); *q = BBASE(BUF_B(me)); return (BLEN(BUF_B(me))); }
	375
	376	static PyObject wbmeth_zero(PyObject me, PyObject *arg)
	377	{
	378	void *p;
	379	size_t n;
	380	if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
	381	ensure(me, n);
	382	p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
	383	memset(p, 0, n);
	384	RETURN_ME;
	385	}
	386
	387	static PyObject wbmeth_put(PyObject me, PyObject *arg)
	388	{
	389	void *p;
6b54260d	390	Py_ssize_t n;
46e6ad89	391	if (!PyArg_ParseTuple(arg, "s#:put", &p, &n)) return (0);
	392	ensure(me, n);
	393	buf_put(BUF_B(me), p, n); assert(BOK(BUF_B(m)));
	394	RETURN_ME;
	395	}
	396
	397	#define WBMETH_PUTU_(n, W, w) \
	398	static PyObject wbmeth_putu##w(PyObject me, PyObject *arg) \
	399	{ \
	400	uint##n i; \
	401	if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0); \
	402	ensure(me, SZ_##n); \
	403	buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me))); \
	404	RETURN_ME; \
	405	}
	406	DOUINTCONV(WBMETH_PUTU_)
	407
	408	#define SZ_z 1
	409	#define WBMETH_PUTBLK_(n, W, w) \
	410	static PyObject wbmeth_putblk##w(PyObject me, PyObject *arg) \
	411	{ \
	412	char *p; \
6b54260d	413	Py_ssize_t sz; \
46e6ad89	414	if (!PyArg_ParseTuple(arg, "s#:putblk" #w, &p, &sz)) return (0); \
	415	ensure(me, sz + SZ_##n); \
	416	buf_putmem##w(BUF_B(me), p, sz); assert(BOK(BUF_B(me))); \
	417	RETURN_ME; \
	418	}
	419	BUF_DOSUFFIXES(WBMETH_PUTBLK_)
	420
	421	static PyObject wbmeth_putmp(PyObject me, PyObject *arg)
	422	{
	423	mp *x = 0;
	424	if (!PyArg_ParseTuple(arg, "O&:putmp", convmp, &x)) return (0);
	425	ensure(me, mp_octets(x) + 2);
	426	buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
	427	RETURN_ME;
	428	}
	429
	430	static PyObject wbmeth_putgf(PyObject me, PyObject *arg)
	431	{
	432	mp *x = 0;
	433	if (!PyArg_ParseTuple(arg, "O&:putgf", convgf, &x)) return (0);
	434	ensure(me, mp_octets(x) + 2);
	435	buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
	436	MP_DROP(x);
	437	RETURN_ME;
	438	}
	439
	440	static PyObject wbmeth_putecpt(PyObject me, PyObject *arg)
	441	{
	442	ec pt = EC_INIT;
	443	if (!PyArg_ParseTuple(arg, "O&:putecpt", convecpt, &pt)) return (0);
	444	if (EC_ATINF(&pt)) ensure(me, 2);
	445	else ensure(me, 4 + mp_octets(pt.x) + mp_octets(pt.y));
	446	buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	447	EC_DESTROY(&pt);
	448	RETURN_ME;
	449	}
	450
	451	static PyObject wbmeth_putecptraw(PyObject me, PyObject *arg)
	452	{
	453	PyObject *ptobj;
	454	ec pt = EC_INIT;
	455	if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
	456	return (0);
	457	EC_OUT(ECPT_C(ptobj), &pt, ECPT_P(ptobj));
	458	ensure(me, ECPT_C(ptobj)->f->noctets * 2 + 1);
	459	ec_putraw(ECPT_C(ptobj), BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	460	EC_DESTROY(&pt);
	461	RETURN_ME;
	462	}
	463
	464	static PyObject wbmeth_putge(PyObject me, PyObject *arg)
	465	{
	466	PyObject *geobj;
	467	if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
	468	ensure(me, GE_G(geobj)->noctets);
	469	G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
	470	RETURN_ME;
	471	}
	472
	473	static PyObject wbmeth_putgeraw(PyObject me, PyObject *arg)
	474	{
	475	PyObject *geobj;
	476	if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
	477	ensure(me, GE_G(geobj)->noctets);
478	G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
479	RETURN_ME;
480	}
481
482	static PyObject wbget_size(PyObject me, void *hunoz)
483	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
484
485	static PyGetSetDef wbuf_pygetset[] = {
486	#define GETSETNAME(op, name) wb##op##_##name
487	GET (size, "WBUF.size -> SIZE")
488	#undef GETSETNAME
489	{ 0 }
490	};
491
492	static PyMethodDef wbuf_pymethods[] = {
493	#define METHNAME(func) wbmeth_##func
60ddd740	494	METH (zero, "WBUF.zero(N)")
46e6ad89	495	METH (put, "WBUF.put(BYTES)")
	496	#define WBMETH_DECL_PUTU_(n, W, w) \
	497	METH(putu##w, "WBUF.putu" #w "(INT)")
	498	DOUINTCONV(WBMETH_DECL_PUTU_)
	499	#define WBMETH_DECL_PUTBLK_(n, W, w) \
	500	METH(putblk##w, "WBUF.putblk" #w "(BYTES)")
	501	BUF_DOSUFFIXES(WBMETH_DECL_PUTBLK_)
	502	METH (putmp, "WBUF.putmp(X)")
	503	METH (putgf, "WBUF.putgf(X)")
	504	KWMETH(putecpt, "WBUF.putecpt(P)")
	505	METH (putecptraw, "WBUF.putecptraw(P)")
	506	METH (putge, "WBUF.putge(X)")
	507	METH (putgeraw, "WBUF.putgeraw(X)")
	508	#undef METHNAME
	509	{ 0 }
	510	};
	511
	512	static PyBufferProcs wbuf_pybuffer = {
	513	wbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	514	0, /* @bf_getwritebuffer@ */
	515	wbuf_pysegcount, /* @bf_getsegcount@ */
	516	0 /* @bf_getcharbuffer@ */
	517	};
	518
	519	static PyTypeObject wbuf_pytype_skel = {
	520	PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3	521	"WriteBuffer", /* @tp_name@ */
46e6ad89	522	sizeof(buf_pyobj), /* @tp_basicsize@ */
	523	0, /* @tp_itemsize@ */
	524
	525	buf_pydealloc, /* @tp_dealloc@ */
	526	0, /* @tp_print@ */
	527	0, /* @tp_getattr@ */
	528	0, /* @tp_setattr@ */
	529	0, /* @tp_compare@ */
	530	0, /* @tp_repr@ */
	531	0, /* @tp_as_number@ */
	532	0, /* @tp_as_sequence@ */
	533	0, /* @tp_as_mapping@ */
	534	0, /* @tp_hash@ */
	535	0, /* @tp_call@ */
	536	0, /* @tp_str@ */
	537	0, /* @tp_getattro@ */
	538	0, /* @tp_setattro@ */
	539	&wbuf_pybuffer, /* @tp_as_buffer@ */
	540	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	541	Py_TPFLAGS_BASETYPE,
	542
	543	/* @tp_doc@ */
	544	"A write buffer.",
	545
	546	0, /* @tp_traverse@ */
	547	0, /* @tp_clear@ */
	548	0, /* @tp_richcompare@ */
	549	0, /* @tp_weaklistoffset@ */
	550	0, /* @tp_iter@ */
963a6148	551	0, /* @tp_iternext@ */
46e6ad89	552	wbuf_pymethods, /* @tp_methods@ */
	553	0, /* @tp_members@ */
	554	wbuf_pygetset, /* @tp_getset@ */
	555	0, /* @tp_base@ */
	556	0, /* @tp_dict@ */
	557	0, /* @tp_descr_get@ */
	558	0, /* @tp_descr_set@ */
	559	0, /* @tp_dictoffset@ */
	560	0, /* @tp_init@ */
	561	PyType_GenericAlloc, /* @tp_alloc@ */
	562	wbuf_pynew, /* @tp_new@ */
	563	0, /* @tp_free@ */
	564	0 /* @tp_is_gc@ */
	565	};
	566
	567	/----- Initialization ----------------------------------------------------/
	568
	569	void buffer_pyinit(void)
	570	{
	571	INITTYPE(rbuf, root);
	572	INITTYPE(wbuf, root);
	573	}
	574
	575	void buffer_pyinsert(PyObject *mod)
	576	{
	577	INSEXC("BufferError", buferr, PyExc_Exception, 0);
	578	INSERT("ReadBuffer", rbuf_pytype);
	579	INSERT("WriteBuffer", wbuf_pytype);
	580	}
	581
	582	/----- That's all, folks -------------------------------------------------/