[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"

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

PyTypeObject *rbuf_pytype;

static PyObject *rbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
{
  struct bin in;
  void *q;
  buf_pyobj *me = 0;
  static const char *const kwlist[] = { "data", 0 };

  if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &in))
    goto end;
  q = xmalloc(in.sz);
  memcpy(q, in.p, in.sz);
  me = (buf_pyobj *)ty->tp_alloc(ty, 0);
  me->sub = 0; me->lk = 0;
  buf_init(&me->b, q, in.sz);
end:
  return ((PyObject *)me);
}

static void buf_pydealloc(PyObject *me)
{
  assert(!BUF_LK(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("buffer exhausted");
  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("buffer exhausted");
  return (bytestring_pywrap(p, n));
end:
  return (0);
}

#define RBMETH_GETU_(n, W, w)						\
  static PyObject *rbmeth_getu##w(PyObject *me)				\
  {									\
    uint##n x;								\
    if (buf_getu##w(BUF_B(me), &x)) BUFERR("buffer exhausted");		\
    if (MASK##W <= ULONG_MAX) return (getulong(x));			\
    else { kludge64 y; ASSIGN64(y, x); return (getk64(y)); }		\
  end:									\
    return (0);								\
  }
DOUINTCONV(RBMETH_GETU_)

#define RBMETH_GETBLK_(n, W, w)						\
  static PyObject *rbmeth_getblk##w(PyObject *me)			\
  {									\
    size_t sz;								\
    char *q;								\
    if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0)			\
      BUFERR("buffer exhausted");					\
    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)			\
  {									\
    buf_pyobj *b;							\
    buf bb;								\
    if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR("buffer exhausted");	\
    b = PyObject_NEW(buf_pyobj, rbuf_pytype);				\
    b->b = bb;								\
    b->sub = me;							\
    b->lk = 0;								\
    Py_INCREF(me);							\
    return ((PyObject *)b);						\
  end:									\
    return (0);								\
  }
BUF_DOSUFFIXES(RBMETH_GETBUF_)

static PyObject *rbmeth_getmp(PyObject *me)
{
  mp *x;
  if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
  return (mp_pywrap(x));
end:
  return (0);
}

static PyObject *rbmeth_getgf(PyObject *me)
{
  mp *x;
  if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
  return (gf_pywrap(x));
end:
  return (0);
}

static PyObject *rbmeth_getecpt(PyObject *me, PyObject *arg, PyObject *kw)
{
  PyObject *cobj = Py_None;
  static const char *const 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("buffer exhausted");
  return (ecpt_pywrapout(cobj, &pt));
end:
  return (0);
}

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

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("buffer exhausted");
  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("buffer exhausted");
  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 const 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 const 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)					\
    NAMETH(getu##w,	"RBUF.getu" #w "() -> INT")
  DOUINTCONV(RBMETH_DECL_GETU_)
#define RBMETH_DECL_GETBLK_(n, W, w)					\
    NAMETH(getblk##w,	"RBUF.getblk" #w "() -> BYTES")
  BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
#define RBMETH_DECL_GETBUF_(n, W, w)					\
    NAMETH(getbuf##w,	"RBUF.getbuf" #w "() -> RBUF'")
  BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
  NAMETH(getmp,		"RBUF.getmp() -> X")
  NAMETH(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 const PyBufferProcs rbuf_pybuffer = {
  rbuf_pyreadbuf,			/* @bf_getreadbuffer@ */
  0,					/* @bf_getwritebuffer@ */
  rbuf_pysegcount,			/* @bf_getsegcount@ */
  0					/* @bf_getcharbuffer@ */
};

static const PyTypeObject rbuf_pytype_skel = {
  PyVarObject_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@ */
  PYBUFFER(rbuf),			/* @tp_as_buffer@ */
  Py_TPFLAGS_DEFAULT |			/* @tp_flags@ */
    Py_TPFLAGS_BASETYPE,

  /* @tp_doc@ */
  "ReadBuffer(STR): a read buffer.",

  0,					/* @tp_traverse@ */
  0,					/* @tp_clear@ */
  0,					/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternext@ */
  PYMETHODS(rbuf),			/* @tp_methods@ */
  0,					/* @tp_members@ */
  PYGETSET(rbuf),			/* @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 -----------------------------------------------------*/

PyTypeObject *wbuf_pytype;

int ensurebuf(PyObject *me, size_t n)
{
  buf *b = BUF_B(me);
  size_t nn = BSZ(b);
  octet *p;
  size_t want = BLEN(b) + n;

  if (BLEFT(b) >= n)
    return (0);
  else if (BUF_LK(me))
    BUFERR("buffer locked");
  else {
    while (nn < want) nn <<= 1;
    p = xrealloc(BBASE(b), nn, BSZ(b));
    BCUR(b) = p + BLEN(b);
    BLIM(b) = p + nn;
    BBASE(b) = p;
    return (0);
  }
end:
  return (-1);
}

static PyObject *wbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
{
  char *p;
  size_t n = 64;
  buf_pyobj *me = 0;
  static const char *const 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; me->lk = 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);
  if (ensurebuf(me, n)) return (0);
  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)
{
  struct bin in;
  if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
  if (ensurebuf(me, in.sz)) return (0);
  buf_put(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));
  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);	\
    if (ensurebuf(me, SZ_##n)) return (0);				\
    buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me)));			\
    RETURN_ME;								\
  }
DOUINTCONV(WBMETH_PUTU_)

#define MASKz 0
#define SZ_z 1
#define WBMETH_PUTBLK_(n, W, w)						\
  static PyObject *wbmeth_putblk##w(PyObject *me, PyObject *arg)	\
  {									\
    struct bin in;							\
    if (!PyArg_ParseTuple(arg, "O&:putblk" #w, convbin, &in)) goto end;	\
    if (MASK##W && in.sz > MASK##W) VALERR("too large");		\
    if (ensurebuf(me, in.sz + SZ_##n)) return (0);			\
    buf_putmem##w(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));	\
    RETURN_ME;								\
  end:									\
    return (0);								\
  }
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);
  if (ensurebuf(me, mp_octets(x) + 2)) return (0);
  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);
  if (ensurebuf(me, mp_octets(x) + 2)) return (0);
  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 (ensurebuf(me, EC_ATINF(&pt) ? 2 :
		6 + mp_octets(pt.x) + mp_octets(pt.y)))
    return (0);
  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));
  if (ensurebuf(me, ECPT_C(ptobj)->f->noctets * 2 + 1)) return (0);
  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);
  if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
  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);
  if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
  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 PyObject *wbget_contents(PyObject *me, void *hunoz)
  { return (bytestring_pywrap(BBASE(BUF_B(me)), BLEN(BUF_B(me)))); }

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

static const 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)")
  METH	(putecpt,	"WBUF.putecpt(P)")
  METH	(putecptraw,	"WBUF.putecptraw(P)")
  METH	(putge,		"WBUF.putge(X)")
  METH	(putgeraw,	"WBUF.putgeraw(X)")
#undef METHNAME
  { 0 }
};

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

static const PyTypeObject wbuf_pytype_skel = {
  PyVarObject_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@ */
  PYBUFFER(wbuf),			/* @tp_as_buffer@ */
  Py_TPFLAGS_DEFAULT |			/* @tp_flags@ */
    Py_TPFLAGS_BASETYPE,

  /* @tp_doc@ */
  "WriteBuffer([size = ?]): a write buffer.",

  0,					/* @tp_traverse@ */
  0,					/* @tp_clear@ */
  0,					/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternext@ */
  PYMETHODS(wbuf),			/* @tp_methods@ */
  0,					/* @tp_members@ */
  PYGETSET(wbuf),			/* @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 ----------------------------------------------------*/

PyObject *buferr;

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	*
46e6ad89	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
46e6ad89	31	/----- Read buffers ------------------------------------------------------/
46e6ad89	32
128fdfb4 MW	33	PyTypeObject *rbuf_pytype;
128fdfb4 MW	34
46e6ad89	35	static PyObject rbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
46e6ad89	36	{
be17c8c2 MW	37	struct bin in;
be17c8c2 MW	38	void *q;
46e6ad89	39	buf_pyobj *me = 0;
827f89d7	40	static const char *const kwlist[] = { "data", 0 };
46e6ad89	41
be17c8c2	42	if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &in))
46e6ad89	43	goto end;
be17c8c2 MW	44	q = xmalloc(in.sz);
be17c8c2 MW	45	memcpy(q, in.p, in.sz);
0463996f	46	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
1d460442	47	me->sub = 0; me->lk = 0;
be17c8c2	48	buf_init(&me->b, q, in.sz);
46e6ad89	49	end:
	50	return ((PyObject *)me);
	51	}
	52
	53	static void buf_pydealloc(PyObject *me)
0463996f	54	{
1d460442 MW	55	assert(!BUF_LK(me));
	56	if (BUF_SUB(me)) Py_DECREF(BUF_SUB(me));
	57	else xfree(BBASE(BUF_B(me)));
0463996f	58	FREEOBJ(me);
0463996f	59	}
46e6ad89	60
3d8f5f7c	61	static Py_ssize_t rbuf_pysegcount(PyObject me, Py_ssize_t nn)
46e6ad89	62	{ if (nn) *nn = BSZ(BUF_B(me)); return (1); }
46e6ad89	63
3d8f5f7c	64	static Py_ssize_t rbuf_pyreadbuf(PyObject me, Py_ssize_t seg, void *q)
f368b46e	65	{ assert(seg == 0); *q = BCUR(BUF_B(me)); return (BLEFT(BUF_B(me))); }
46e6ad89	66
	67	static PyObject rbmeth_skip(PyObject me, PyObject *arg)
	68	{
	69	size_t n;
	70
	71	if (!PyArg_ParseTuple(arg, "O&:skip", convszt, &n)) goto end;
326f6eb0	72	if (!buf_get(BUF_B(me), n)) BUFERR("buffer exhausted");
46e6ad89	73	RETURN_ME;
	74	end:
	75	return (0);
	76	}
	77
	78	static PyObject rbmeth_get(PyObject me, PyObject *arg)
	79	{
	80	void *p;
	81	size_t n;
	82
	83	if (!PyArg_ParseTuple(arg, "O&:get", convszt, &n)) goto end;
326f6eb0	84	if ((p = buf_get(BUF_B(me), n)) == 0) BUFERR("buffer exhausted");
46e6ad89	85	return (bytestring_pywrap(p, n));
	86	end:
	87	return (0);
	88	}
	89
	90	#define RBMETH_GETU_(n, W, w) \
7a75bb76	91	static PyObject rbmeth_getu##w(PyObject me) \
46e6ad89	92	{ \
46e6ad89	93	uint##n x; \
326f6eb0	94	if (buf_getu##w(BUF_B(me), &x)) BUFERR("buffer exhausted"); \
2da7a9c0 MW	95	if (MASK##W <= ULONG_MAX) return (getulong(x)); \
2da7a9c0 MW	96	else { kludge64 y; ASSIGN64(y, x); return (getk64(y)); } \
46e6ad89	97	end: \
	98	return (0); \
	99	}
	100	DOUINTCONV(RBMETH_GETU_)
	101
	102	#define RBMETH_GETBLK_(n, W, w) \
7a75bb76	103	static PyObject rbmeth_getblk##w(PyObject me) \
46e6ad89	104	{ \
	105	size_t sz; \
	106	char *q; \
326f6eb0 MW	107	if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0) \
326f6eb0 MW	108	BUFERR("buffer exhausted"); \
46e6ad89	109	return (bytestring_pywrap(q, sz)); \
	110	end: \
	111	return (0); \
	112	}
	113	BUF_DOSUFFIXES(RBMETH_GETBLK_)
	114
0463996f	115	#define RBMETH_GETBUF_(n, W, w) \
7a75bb76	116	static PyObject rbmeth_getbuf##w(PyObject me) \
0463996f	117	{ \
	118	buf_pyobj *b; \
	119	buf bb; \
326f6eb0	120	if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR("buffer exhausted"); \
0463996f	121	b = PyObject_NEW(buf_pyobj, rbuf_pytype); \
	122	b->b = bb; \
	123	b->sub = me; \
1d460442	124	b->lk = 0; \
0463996f	125	Py_INCREF(me); \
	126	return ((PyObject *)b); \
	127	end: \
	128	return (0); \
	129	}
	130	BUF_DOSUFFIXES(RBMETH_GETBUF_)
	131
7a75bb76	132	static PyObject rbmeth_getmp(PyObject me)
46e6ad89	133	{
46e6ad89	134	mp *x;
326f6eb0	135	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
46e6ad89	136	return (mp_pywrap(x));
	137	end:
	138	return (0);
	139	}
	140
7a75bb76	141	static PyObject rbmeth_getgf(PyObject me)
46e6ad89	142	{
46e6ad89	143	mp *x;
326f6eb0	144	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
46e6ad89	145	return (gf_pywrap(x));
	146	end:
	147	return (0);
	148	}
	149
	150	static PyObject rbmeth_getecpt(PyObject me, PyObject arg, PyObject kw)
	151	{
	152	PyObject *cobj = Py_None;
827f89d7	153	static const char *const kwlist[] = { "curve", 0 };
46e6ad89	154	ec pt = EC_INIT;
827f89d7	155	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O:getecpt", KWLIST, &cobj))
46e6ad89	156	goto end;
	157	if (cobj == Py_None) cobj = (PyObject *)ecpt_pytype;
	158	if (!PyType_Check(cobj) \|\|
	159	!PyType_IsSubtype((PyTypeObject *)cobj, ecpt_pytype))
	160	TYERR("expected elliptic curve type");
326f6eb0	161	if (buf_getec(BUF_B(me), &pt)) BUFERR("buffer exhausted");
46e6ad89	162	return (ecpt_pywrapout(cobj, &pt));
	163	end:
	164	return (0);
	165	}
b2687a0a	166
46e6ad89	167	static PyObject rbmeth_getecptraw(PyObject me, PyObject *arg)
46e6ad89	168	{
5b1ef02a	169	PyObject *cobj;
46e6ad89	170	ec pt = EC_INIT;
45fb29bc	171	PyObject *rc = 0;
46e6ad89	172	if (!PyArg_ParseTuple(arg, "O!:getecptraw", eccurve_pytype, &cobj))
46e6ad89	173	goto end;
326f6eb0	174	if (ec_getraw(ECCURVE_C(cobj), BUF_B(me), &pt)) BUFERR("buffer exhausted");
45fb29bc	175	rc = ecpt_pywrapout(cobj, &pt);
46e6ad89	176	end:
45fb29bc	177	return (rc);
46e6ad89	178	}
	179
	180	static PyObject rbmeth_getge(PyObject me, PyObject *arg)
	181	{
	182	PyObject *gobj;
	183	ge *x = 0;
	184	if (!PyArg_ParseTuple(arg, "O!:getge", group_pytype, &gobj)) goto end;
	185	x = G_CREATE(GROUP_G(gobj));
326f6eb0	186	if (G_FROMBUF(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
46e6ad89	187	return (ge_pywrap(gobj, x));
	188	end:
	189	if (x) G_DESTROY(GROUP_G(gobj), x);
	190	return (0);
	191	}
	192
	193	static PyObject rbmeth_getgeraw(PyObject me, PyObject *arg)
	194	{
	195	PyObject *gobj;
	196	ge *x = 0;
	197	if (!PyArg_ParseTuple(arg, "O!:getgeraw", group_pytype, &gobj)) goto end;
	198	x = G_CREATE(GROUP_G(gobj));
326f6eb0	199	if (G_FROMRAW(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
46e6ad89	200	return (ge_pywrap(gobj, x));
	201	end:
	202	if (x) G_DESTROY(GROUP_G(gobj), x);
	203	return (0);
	204	}
	205
	206	static PyObject rbget_size(PyObject me, void *hunoz)
	207	{ return (PyInt_FromLong(BSZ(BUF_B(me)))); }
	208	static PyObject rbget_left(PyObject me, void *hunoz)
	209	{ return (PyInt_FromLong(BLEFT(BUF_B(me)))); }
	210	static PyObject rbget_endp(PyObject me, void *hunoz)
	211	{ return (getbool(!BLEFT(BUF_B(me)))); }
0463996f	212	static PyObject rbget_offset(PyObject me, void *hunoz)
	213	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
	214	static int rbset_offset(PyObject me, PyObject x, void *hunoz)
	215	{
	216	size_t n;
f368b46e	217	if (!x) NIERR("__del__");
0463996f	218	if (!convszt(x, &n)) goto end;
	219	if (n > BSZ(BUF_B(me))) VALERR("out of range");
	220	BCUR(BUF_B(me)) = BBASE(BUF_B(me)) + n;
	221	return (0);
	222	end:
	223	return (-1);
	224	}
46e6ad89	225
637b9140	226	static const PyGetSetDef rbuf_pygetset[] = {
46e6ad89	227	#define GETSETNAME(op, name) rb##op##_##name
ef783f91 MW	228	GET (size, "RBUF.size -> SIZE")
	229	GET (left, "RBUF.left -> REMAINDER")
	230	GET (endp, "RBUF.endp -> BOOL")
	231	GETSET(offset, "RBUF.offset -> OFFSET")
46e6ad89	232	#undef GETSETNAME
	233	{ 0 }
	234	};
	235
637b9140	236	static const PyMethodDef rbuf_pymethods[] = {
46e6ad89	237	#define METHNAME(func) rbmeth_##func
ef783f91 MW	238	METH (skip, "RBUF.skip(N)")
ef783f91 MW	239	METH (get, "RBUF.get(N) -> BYTES")
46e6ad89	240	#define RBMETH_DECL_GETU_(n, W, w) \
7a75bb76	241	NAMETH(getu##w, "RBUF.getu" #w "() -> INT")
46e6ad89	242	DOUINTCONV(RBMETH_DECL_GETU_)
46e6ad89	243	#define RBMETH_DECL_GETBLK_(n, W, w) \
7a75bb76	244	NAMETH(getblk##w, "RBUF.getblk" #w "() -> BYTES")
46e6ad89	245	BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
0463996f	246	#define RBMETH_DECL_GETBUF_(n, W, w) \
7a75bb76	247	NAMETH(getbuf##w, "RBUF.getbuf" #w "() -> RBUF'")
0463996f	248	BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
7a75bb76 MW	249	NAMETH(getmp, "RBUF.getmp() -> X")
7a75bb76 MW	250	NAMETH(getgf, "RBUF.getgf() -> X")
ef783f91 MW	251	KWMETH(getecpt, "RBUF.getecpt([curve = None]) -> P")
	252	METH (getecptraw, "RBUF.getecptraw(CURVE) -> P")
	253	METH (getge, "RBUF.getge(GROUP) -> X")
	254	METH (getgeraw, "RBUF.getgeraw(GROUP) -> X")
46e6ad89	255	#undef METHNAME
	256	{ 0 }
	257	};
	258
637b9140	259	static const PyBufferProcs rbuf_pybuffer = {
46e6ad89	260	rbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	261	0, /* @bf_getwritebuffer@ */
	262	rbuf_pysegcount, /* @bf_getsegcount@ */
	263	0 /* @bf_getcharbuffer@ */
	264	};
	265
ddd4720b	266	static const PyTypeObject rbuf_pytype_skel = {
4648f560	267	PyVarObject_HEAD_INIT(0, 0) /* Header */
c461c9b3	268	"ReadBuffer", /* @tp_name@ */
46e6ad89	269	sizeof(buf_pyobj), /* @tp_basicsize@ */
	270	0, /* @tp_itemsize@ */
	271
	272	buf_pydealloc, /* @tp_dealloc@ */
	273	0, /* @tp_print@ */
	274	0, /* @tp_getattr@ */
	275	0, /* @tp_setattr@ */
	276	0, /* @tp_compare@ */
	277	0, /* @tp_repr@ */
	278	0, /* @tp_as_number@ */
	279	0, /* @tp_as_sequence@ */
	280	0, /* @tp_as_mapping@ */
	281	0, /* @tp_hash@ */
	282	0, /* @tp_call@ */
	283	0, /* @tp_str@ */
	284	0, /* @tp_getattro@ */
	285	0, /* @tp_setattro@ */
637b9140	286	PYBUFFER(rbuf), /* @tp_as_buffer@ */
46e6ad89	287	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	288	Py_TPFLAGS_BASETYPE,
	289
	290	/* @tp_doc@ */
ef783f91	291	"ReadBuffer(STR): a read buffer.",
46e6ad89	292
	293	0, /* @tp_traverse@ */
	294	0, /* @tp_clear@ */
	295	0, /* @tp_richcompare@ */
	296	0, /* @tp_weaklistoffset@ */
	297	0, /* @tp_iter@ */
963a6148	298	0, /* @tp_iternext@ */
637b9140	299	PYMETHODS(rbuf), /* @tp_methods@ */
46e6ad89	300	0, /* @tp_members@ */
637b9140	301	PYGETSET(rbuf), /* @tp_getset@ */
46e6ad89	302	0, /* @tp_base@ */
	303	0, /* @tp_dict@ */
	304	0, /* @tp_descr_get@ */
	305	0, /* @tp_descr_set@ */
	306	0, /* @tp_dictoffset@ */
	307	0, /* @tp_init@ */
	308	PyType_GenericAlloc, /* @tp_alloc@ */
	309	rbuf_pynew, /* @tp_new@ */
	310	0, /* @tp_free@ */
	311	0 /* @tp_is_gc@ */
	312	};
	313
	314	/----- Write buffers -----------------------------------------------------/
	315
128fdfb4 MW	316	PyTypeObject *wbuf_pytype;
	317
	318	int ensurebuf(PyObject *me, size_t n)
46e6ad89	319	{
46e6ad89	320	buf *b = BUF_B(me);
1d460442 MW	321	size_t nn = BSZ(b);
	322	octet *p;
	323	size_t want = BLEN(b) + n;
46e6ad89	324
1d460442 MW	325	if (BLEFT(b) >= n)
	326	return (0);
	327	else if (BUF_LK(me))
	328	BUFERR("buffer locked");
	329	else {
46e6ad89	330	while (nn < want) nn <<= 1;
	331	p = xrealloc(BBASE(b), nn, BSZ(b));
	332	BCUR(b) = p + BLEN(b);
	333	BLIM(b) = p + nn;
	334	BBASE(b) = p;
1d460442	335	return (0);
46e6ad89	336	}
1d460442 MW	337	end:
1d460442 MW	338	return (-1);
46e6ad89	339	}
	340
	341	static PyObject wbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	342	{
	343	char *p;
	344	size_t n = 64;
	345	buf_pyobj *me = 0;
827f89d7	346	static const char *const kwlist[] = { "size", 0 };
46e6ad89	347
827f89d7	348	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O&:new", KWLIST,
46e6ad89	349	convszt, &n))
	350	goto end;
	351	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
	352	p = xmalloc(n);
1d460442	353	me->sub = 0; me->lk = 0;
46e6ad89	354	buf_init(&me->b, p, n);
	355	end:
	356	return ((PyObject *)me);
	357	}
	358
3d8f5f7c	359	static Py_ssize_t wbuf_pysegcount(PyObject me, Py_ssize_t nn)
46e6ad89	360	{ if (nn) *nn = BLEN(BUF_B(me)); return (1); }
46e6ad89	361
3d8f5f7c	362	static Py_ssize_t wbuf_pyreadbuf(PyObject me, Py_ssize_t seg, void *q)
46e6ad89	363	{ assert(seg == 0); *q = BBASE(BUF_B(me)); return (BLEN(BUF_B(me))); }
	364
	365	static PyObject wbmeth_zero(PyObject me, PyObject *arg)
	366	{
	367	void *p;
	368	size_t n;
	369	if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
128fdfb4	370	if (ensurebuf(me, n)) return (0);
46e6ad89	371	p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
	372	memset(p, 0, n);
	373	RETURN_ME;
	374	}
	375
	376	static PyObject wbmeth_put(PyObject me, PyObject *arg)
	377	{
be17c8c2 MW	378	struct bin in;
be17c8c2 MW	379	if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
128fdfb4	380	if (ensurebuf(me, in.sz)) return (0);
be17c8c2	381	buf_put(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));
46e6ad89	382	RETURN_ME;
	383	}
	384
	385	#define WBMETH_PUTU_(n, W, w) \
	386	static PyObject wbmeth_putu##w(PyObject me, PyObject *arg) \
	387	{ \
	388	uint##n i; \
	389	if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0); \
128fdfb4	390	if (ensurebuf(me, SZ_##n)) return (0); \
46e6ad89	391	buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me))); \
	392	RETURN_ME; \
	393	}
	394	DOUINTCONV(WBMETH_PUTU_)
	395
9fa70ff7	396	#define MASKz 0
46e6ad89	397	#define SZ_z 1
	398	#define WBMETH_PUTBLK_(n, W, w) \
	399	static PyObject wbmeth_putblk##w(PyObject me, PyObject *arg) \
	400	{ \
be17c8c2 MW	401	struct bin in; \
	402	if (!PyArg_ParseTuple(arg, "O&:putblk" #w, convbin, &in)) goto end; \
	403	if (MASK##W && in.sz > MASK##W) VALERR("too large"); \
128fdfb4	404	if (ensurebuf(me, in.sz + SZ_##n)) return (0); \
be17c8c2	405	buf_putmem##w(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me))); \
46e6ad89	406	RETURN_ME; \
9fa70ff7 MW	407	end: \
9fa70ff7 MW	408	return (0); \
46e6ad89	409	}
	410	BUF_DOSUFFIXES(WBMETH_PUTBLK_)
	411
	412	static PyObject wbmeth_putmp(PyObject me, PyObject *arg)
	413	{
	414	mp *x = 0;
	415	if (!PyArg_ParseTuple(arg, "O&:putmp", convmp, &x)) return (0);
128fdfb4	416	if (ensurebuf(me, mp_octets(x) + 2)) return (0);
46e6ad89	417	buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
	418	RETURN_ME;
	419	}
	420
	421	static PyObject wbmeth_putgf(PyObject me, PyObject *arg)
	422	{
	423	mp *x = 0;
	424	if (!PyArg_ParseTuple(arg, "O&:putgf", convgf, &x)) return (0);
128fdfb4	425	if (ensurebuf(me, mp_octets(x) + 2)) return (0);
46e6ad89	426	buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
	427	MP_DROP(x);
	428	RETURN_ME;
	429	}
	430
	431	static PyObject wbmeth_putecpt(PyObject me, PyObject *arg)
	432	{
	433	ec pt = EC_INIT;
	434	if (!PyArg_ParseTuple(arg, "O&:putecpt", convecpt, &pt)) return (0);
128fdfb4 MW	435	if (ensurebuf(me, EC_ATINF(&pt) ? 2 :
128fdfb4 MW	436	6 + mp_octets(pt.x) + mp_octets(pt.y)))
1d460442	437	return (0);
46e6ad89	438	buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	439	EC_DESTROY(&pt);
	440	RETURN_ME;
	441	}
	442
	443	static PyObject wbmeth_putecptraw(PyObject me, PyObject *arg)
	444	{
	445	PyObject *ptobj;
	446	ec pt = EC_INIT;
	447	if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
	448	return (0);
	449	EC_OUT(ECPT_C(ptobj), &pt, ECPT_P(ptobj));
128fdfb4	450	if (ensurebuf(me, ECPT_C(ptobj)->f->noctets * 2 + 1)) return (0);
46e6ad89	451	ec_putraw(ECPT_C(ptobj), BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	452	EC_DESTROY(&pt);
	453	RETURN_ME;
	454	}
	455
	456	static PyObject wbmeth_putge(PyObject me, PyObject *arg)
	457	{
	458	PyObject *geobj;
	459	if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
128fdfb4	460	if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
46e6ad89	461	G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
	462	RETURN_ME;
	463	}
	464
	465	static PyObject wbmeth_putgeraw(PyObject me, PyObject *arg)
	466	{
	467	PyObject *geobj;
	468	if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
128fdfb4	469	if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
46e6ad89	470	G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
	471	RETURN_ME;
	472	}
	473
	474	static PyObject wbget_size(PyObject me, void *hunoz)
	475	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
	476
0051d10f MW	477	static PyObject wbget_contents(PyObject me, void *hunoz)
	478	{ return (bytestring_pywrap(BBASE(BUF_B(me)), BLEN(BUF_B(me)))); }
	479
637b9140	480	static const PyGetSetDef wbuf_pygetset[] = {
46e6ad89	481	#define GETSETNAME(op, name) wb##op##_##name
ef783f91 MW	482	GET (size, "WBUF.size -> SIZE")
ef783f91 MW	483	GET (contents, "WBUF.contents -> STR")
46e6ad89	484	#undef GETSETNAME
	485	{ 0 }
	486	};
	487
637b9140	488	static const PyMethodDef wbuf_pymethods[] = {
46e6ad89	489	#define METHNAME(func) wbmeth_##func
ef783f91 MW	490	METH (zero, "WBUF.zero(N)")
ef783f91 MW	491	METH (put, "WBUF.put(BYTES)")
46e6ad89	492	#define WBMETH_DECL_PUTU_(n, W, w) \
ef783f91	493	METH(putu##w, "WBUF.putu" #w "(INT)")
46e6ad89	494	DOUINTCONV(WBMETH_DECL_PUTU_)
46e6ad89	495	#define WBMETH_DECL_PUTBLK_(n, W, w) \
ef783f91	496	METH(putblk##w, "WBUF.putblk" #w "(BYTES)")
46e6ad89	497	BUF_DOSUFFIXES(WBMETH_DECL_PUTBLK_)
ef783f91 MW	498	METH (putmp, "WBUF.putmp(X)")
	499	METH (putgf, "WBUF.putgf(X)")
	500	METH (putecpt, "WBUF.putecpt(P)")
	501	METH (putecptraw, "WBUF.putecptraw(P)")
	502	METH (putge, "WBUF.putge(X)")
	503	METH (putgeraw, "WBUF.putgeraw(X)")
46e6ad89	504	#undef METHNAME
	505	{ 0 }
	506	};
	507
637b9140	508	static const PyBufferProcs wbuf_pybuffer = {
46e6ad89	509	wbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	510	0, /* @bf_getwritebuffer@ */
	511	wbuf_pysegcount, /* @bf_getsegcount@ */
	512	0 /* @bf_getcharbuffer@ */
	513	};
	514
ddd4720b	515	static const PyTypeObject wbuf_pytype_skel = {
4648f560	516	PyVarObject_HEAD_INIT(0, 0) /* Header */
c461c9b3	517	"WriteBuffer", /* @tp_name@ */
46e6ad89	518	sizeof(buf_pyobj), /* @tp_basicsize@ */
	519	0, /* @tp_itemsize@ */
	520
	521	buf_pydealloc, /* @tp_dealloc@ */
	522	0, /* @tp_print@ */
	523	0, /* @tp_getattr@ */
	524	0, /* @tp_setattr@ */
	525	0, /* @tp_compare@ */
	526	0, /* @tp_repr@ */
	527	0, /* @tp_as_number@ */
	528	0, /* @tp_as_sequence@ */
	529	0, /* @tp_as_mapping@ */
	530	0, /* @tp_hash@ */
	531	0, /* @tp_call@ */
	532	0, /* @tp_str@ */
	533	0, /* @tp_getattro@ */
	534	0, /* @tp_setattro@ */
637b9140	535	PYBUFFER(wbuf), /* @tp_as_buffer@ */
46e6ad89	536	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	537	Py_TPFLAGS_BASETYPE,
	538
	539	/* @tp_doc@ */
ef783f91	540	"WriteBuffer([size = ?]): a write buffer.",
46e6ad89	541
	542	0, /* @tp_traverse@ */
	543	0, /* @tp_clear@ */
	544	0, /* @tp_richcompare@ */
	545	0, /* @tp_weaklistoffset@ */
	546	0, /* @tp_iter@ */
963a6148	547	0, /* @tp_iternext@ */
637b9140	548	PYMETHODS(wbuf), /* @tp_methods@ */
46e6ad89	549	0, /* @tp_members@ */
637b9140	550	PYGETSET(wbuf), /* @tp_getset@ */
46e6ad89	551	0, /* @tp_base@ */
	552	0, /* @tp_dict@ */
	553	0, /* @tp_descr_get@ */
	554	0, /* @tp_descr_set@ */
	555	0, /* @tp_dictoffset@ */
	556	0, /* @tp_init@ */
	557	PyType_GenericAlloc, /* @tp_alloc@ */
	558	wbuf_pynew, /* @tp_new@ */
	559	0, /* @tp_free@ */
	560	0 /* @tp_is_gc@ */
	561	};
	562
	563	/----- Initialization ----------------------------------------------------/
	564
128fdfb4 MW	565	PyObject *buferr;
128fdfb4 MW	566
46e6ad89	567	void buffer_pyinit(void)
	568	{
	569	INITTYPE(rbuf, root);
	570	INITTYPE(wbuf, root);
	571	}
	572
	573	void buffer_pyinsert(PyObject *mod)
	574	{
	575	INSEXC("BufferError", buferr, PyExc_Exception, 0);
	576	INSERT("ReadBuffer", rbuf_pytype);
	577	INSERT("WriteBuffer", wbuf_pytype);
	578	}
	579
	580	/----- That's all, folks -------------------------------------------------/