[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(str) do { PyErr_SetString(buferr, str); goto end; } while (0)

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

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;
  buf_init(&me->b, q, in.sz);
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("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;							\
    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 -----------------------------------------------------*/

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 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;
  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)
{
  struct bin in;
  if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
  ensure(me, in.sz);
  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);	\
    ensure(me, SZ_##n);							\
    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");		\
    ensure(me, in.sz + SZ_##n);						\
    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);
  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);
  ensure(me, EC_ATINF(&pt) ? 2 : 6 + 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 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 ----------------------------------------------------*/

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
	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
de2b80a2	49	#define BUFERR(str) do { PyErr_SetString(buferr, str); goto end; } while (0)
46e6ad89	50
	51	/----- Read buffers ------------------------------------------------------/
	52
	53	static PyObject rbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	54	{
67c75893 MW	55	struct bin in;
67c75893 MW	56	void *q;
46e6ad89	57	buf_pyobj *me = 0;
827f89d7	58	static const char *const kwlist[] = { "data", 0 };
46e6ad89	59
67c75893	60	if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &in))
46e6ad89	61	goto end;
67c75893 MW	62	q = xmalloc(in.sz);
67c75893 MW	63	memcpy(q, in.p, in.sz);
0463996f	64	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
0463996f	65	me->sub = 0;
67c75893	66	buf_init(&me->b, q, in.sz);
46e6ad89	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;
de2b80a2	91	if (!buf_get(BUF_B(me), n)) BUFERR("buffer exhausted");
46e6ad89	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;
de2b80a2	103	if ((p = buf_get(BUF_B(me), n)) == 0) BUFERR("buffer exhausted");
46e6ad89	104	return (bytestring_pywrap(p, n));
	105	end:
	106	return (0);
	107	}
	108
	109	#define RBMETH_GETU_(n, W, w) \
91e56f06	110	static PyObject rbmeth_getu##w(PyObject me) \
46e6ad89	111	{ \
46e6ad89	112	uint##n x; \
de2b80a2	113	if (buf_getu##w(BUF_B(me), &x)) BUFERR("buffer exhausted"); \
2da7a9c0 MW	114	if (MASK##W <= ULONG_MAX) return (getulong(x)); \
2da7a9c0 MW	115	else { kludge64 y; ASSIGN64(y, x); return (getk64(y)); } \
46e6ad89	116	end: \
	117	return (0); \
	118	}
	119	DOUINTCONV(RBMETH_GETU_)
	120
	121	#define RBMETH_GETBLK_(n, W, w) \
91e56f06	122	static PyObject rbmeth_getblk##w(PyObject me) \
46e6ad89	123	{ \
	124	size_t sz; \
	125	char *q; \
de2b80a2 MW	126	if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0) \
de2b80a2 MW	127	BUFERR("buffer exhausted"); \
46e6ad89	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) \
91e56f06	135	static PyObject rbmeth_getbuf##w(PyObject me) \
0463996f	136	{ \
	137	buf_pyobj *b; \
	138	buf bb; \
de2b80a2	139	if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR("buffer exhausted"); \
0463996f	140	b = PyObject_NEW(buf_pyobj, rbuf_pytype); \
	141	b->b = bb; \
	142	b->sub = me; \
	143	Py_INCREF(me); \
	144	return ((PyObject *)b); \
	145	end: \
	146	return (0); \
	147	}
	148	BUF_DOSUFFIXES(RBMETH_GETBUF_)
	149
91e56f06	150	static PyObject rbmeth_getmp(PyObject me)
46e6ad89	151	{
46e6ad89	152	mp *x;
de2b80a2	153	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
46e6ad89	154	return (mp_pywrap(x));
	155	end:
	156	return (0);
	157	}
	158
91e56f06	159	static PyObject rbmeth_getgf(PyObject me)
46e6ad89	160	{
46e6ad89	161	mp *x;
de2b80a2	162	if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
46e6ad89	163	return (gf_pywrap(x));
	164	end:
	165	return (0);
	166	}
	167
	168	static PyObject rbmeth_getecpt(PyObject me, PyObject arg, PyObject kw)
	169	{
	170	PyObject *cobj = Py_None;
827f89d7	171	static const char *const kwlist[] = { "curve", 0 };
46e6ad89	172	ec pt = EC_INIT;
827f89d7	173	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O:getecpt", KWLIST, &cobj))
46e6ad89	174	goto end;
	175	if (cobj == Py_None) cobj = (PyObject *)ecpt_pytype;
	176	if (!PyType_Check(cobj) \|\|
	177	!PyType_IsSubtype((PyTypeObject *)cobj, ecpt_pytype))
	178	TYERR("expected elliptic curve type");
de2b80a2	179	if (buf_getec(BUF_B(me), &pt)) BUFERR("buffer exhausted");
46e6ad89	180	return (ecpt_pywrapout(cobj, &pt));
	181	end:
	182	return (0);
	183	}
b2687a0a	184
46e6ad89	185	static PyObject rbmeth_getecptraw(PyObject me, PyObject *arg)
46e6ad89	186	{
8a431988	187	PyObject *cobj;
46e6ad89	188	ec pt = EC_INIT;
7c7a6f8e	189	PyObject *rc = 0;
46e6ad89	190	if (!PyArg_ParseTuple(arg, "O!:getecptraw", eccurve_pytype, &cobj))
46e6ad89	191	goto end;
de2b80a2	192	if (ec_getraw(ECCURVE_C(cobj), BUF_B(me), &pt)) BUFERR("buffer exhausted");
7c7a6f8e	193	rc = ecpt_pywrapout(cobj, &pt);
46e6ad89	194	end:
7c7a6f8e	195	return (rc);
46e6ad89	196	}
	197
	198	static PyObject rbmeth_getge(PyObject me, PyObject *arg)
	199	{
	200	PyObject *gobj;
	201	ge *x = 0;
	202	if (!PyArg_ParseTuple(arg, "O!:getge", group_pytype, &gobj)) goto end;
	203	x = G_CREATE(GROUP_G(gobj));
de2b80a2	204	if (G_FROMBUF(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
46e6ad89	205	return (ge_pywrap(gobj, x));
	206	end:
	207	if (x) G_DESTROY(GROUP_G(gobj), x);
	208	return (0);
	209	}
	210
	211	static PyObject rbmeth_getgeraw(PyObject me, PyObject *arg)
	212	{
	213	PyObject *gobj;
	214	ge *x = 0;
	215	if (!PyArg_ParseTuple(arg, "O!:getgeraw", group_pytype, &gobj)) goto end;
	216	x = G_CREATE(GROUP_G(gobj));
de2b80a2	217	if (G_FROMRAW(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
46e6ad89	218	return (ge_pywrap(gobj, x));
	219	end:
	220	if (x) G_DESTROY(GROUP_G(gobj), x);
	221	return (0);
	222	}
	223
	224	static PyObject rbget_size(PyObject me, void *hunoz)
	225	{ return (PyInt_FromLong(BSZ(BUF_B(me)))); }
	226	static PyObject rbget_left(PyObject me, void *hunoz)
	227	{ return (PyInt_FromLong(BLEFT(BUF_B(me)))); }
	228	static PyObject rbget_endp(PyObject me, void *hunoz)
	229	{ return (getbool(!BLEFT(BUF_B(me)))); }
0463996f	230	static PyObject rbget_offset(PyObject me, void *hunoz)
	231	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
	232	static int rbset_offset(PyObject me, PyObject x, void *hunoz)
	233	{
	234	size_t n;
f368b46e	235	if (!x) NIERR("__del__");
0463996f	236	if (!convszt(x, &n)) goto end;
	237	if (n > BSZ(BUF_B(me))) VALERR("out of range");
	238	BCUR(BUF_B(me)) = BBASE(BUF_B(me)) + n;
	239	return (0);
	240	end:
	241	return (-1);
	242	}
46e6ad89	243
c90f712e	244	static const PyGetSetDef rbuf_pygetset[] = {
46e6ad89	245	#define GETSETNAME(op, name) rb##op##_##name
d96c882e MW	246	GET (size, "RBUF.size -> SIZE")
	247	GET (left, "RBUF.left -> REMAINDER")
	248	GET (endp, "RBUF.endp -> BOOL")
	249	GETSET(offset, "RBUF.offset -> OFFSET")
46e6ad89	250	#undef GETSETNAME
	251	{ 0 }
	252	};
	253
c90f712e	254	static const PyMethodDef rbuf_pymethods[] = {
46e6ad89	255	#define METHNAME(func) rbmeth_##func
d96c882e MW	256	METH (skip, "RBUF.skip(N)")
d96c882e MW	257	METH (get, "RBUF.get(N) -> BYTES")
46e6ad89	258	#define RBMETH_DECL_GETU_(n, W, w) \
91e56f06	259	NAMETH(getu##w, "RBUF.getu" #w "() -> INT")
46e6ad89	260	DOUINTCONV(RBMETH_DECL_GETU_)
46e6ad89	261	#define RBMETH_DECL_GETBLK_(n, W, w) \
91e56f06	262	NAMETH(getblk##w, "RBUF.getblk" #w "() -> BYTES")
46e6ad89	263	BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
0463996f	264	#define RBMETH_DECL_GETBUF_(n, W, w) \
91e56f06	265	NAMETH(getbuf##w, "RBUF.getbuf" #w "() -> RBUF'")
0463996f	266	BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
91e56f06 MW	267	NAMETH(getmp, "RBUF.getmp() -> X")
91e56f06 MW	268	NAMETH(getgf, "RBUF.getgf() -> X")
d96c882e MW	269	KWMETH(getecpt, "RBUF.getecpt([curve = None]) -> P")
	270	METH (getecptraw, "RBUF.getecptraw(CURVE) -> P")
	271	METH (getge, "RBUF.getge(GROUP) -> X")
	272	METH (getgeraw, "RBUF.getgeraw(GROUP) -> X")
46e6ad89	273	#undef METHNAME
	274	{ 0 }
	275	};
	276
c90f712e	277	static const PyBufferProcs rbuf_pybuffer = {
46e6ad89	278	rbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	279	0, /* @bf_getwritebuffer@ */
	280	rbuf_pysegcount, /* @bf_getsegcount@ */
	281	0 /* @bf_getcharbuffer@ */
	282	};
	283
c263b05c	284	static const PyTypeObject rbuf_pytype_skel = {
591bf41b	285	PyVarObject_HEAD_INIT(0, 0) /* Header */
c461c9b3	286	"ReadBuffer", /* @tp_name@ */
46e6ad89	287	sizeof(buf_pyobj), /* @tp_basicsize@ */
	288	0, /* @tp_itemsize@ */
	289
	290	buf_pydealloc, /* @tp_dealloc@ */
	291	0, /* @tp_print@ */
	292	0, /* @tp_getattr@ */
	293	0, /* @tp_setattr@ */
	294	0, /* @tp_compare@ */
	295	0, /* @tp_repr@ */
	296	0, /* @tp_as_number@ */
	297	0, /* @tp_as_sequence@ */
	298	0, /* @tp_as_mapping@ */
	299	0, /* @tp_hash@ */
	300	0, /* @tp_call@ */
	301	0, /* @tp_str@ */
	302	0, /* @tp_getattro@ */
	303	0, /* @tp_setattro@ */
c90f712e	304	PYBUFFER(rbuf), /* @tp_as_buffer@ */
46e6ad89	305	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	306	Py_TPFLAGS_BASETYPE,
	307
	308	/* @tp_doc@ */
d96c882e	309	"ReadBuffer(STR): a read buffer.",
46e6ad89	310
	311	0, /* @tp_traverse@ */
	312	0, /* @tp_clear@ */
	313	0, /* @tp_richcompare@ */
	314	0, /* @tp_weaklistoffset@ */
	315	0, /* @tp_iter@ */
963a6148	316	0, /* @tp_iternext@ */
c90f712e	317	PYMETHODS(rbuf), /* @tp_methods@ */
46e6ad89	318	0, /* @tp_members@ */
c90f712e	319	PYGETSET(rbuf), /* @tp_getset@ */
46e6ad89	320	0, /* @tp_base@ */
	321	0, /* @tp_dict@ */
	322	0, /* @tp_descr_get@ */
	323	0, /* @tp_descr_set@ */
	324	0, /* @tp_dictoffset@ */
	325	0, /* @tp_init@ */
	326	PyType_GenericAlloc, /* @tp_alloc@ */
	327	rbuf_pynew, /* @tp_new@ */
	328	0, /* @tp_free@ */
	329	0 /* @tp_is_gc@ */
	330	};
	331
	332	/----- Write buffers -----------------------------------------------------/
	333
	334	static void ensure(PyObject *me, size_t n)
	335	{
	336	buf *b = BUF_B(me);
	337
	338	if (BLEFT(b) < n) {
	339	size_t nn = BSZ(b);
	340	octet *p;
c4ca600f	341	size_t want = BLEN(b) + n;
46e6ad89	342	while (nn < want) nn <<= 1;
	343	p = xrealloc(BBASE(b), nn, BSZ(b));
	344	BCUR(b) = p + BLEN(b);
	345	BLIM(b) = p + nn;
	346	BBASE(b) = p;
	347	}
	348	}
	349
	350	static PyObject wbuf_pynew(PyTypeObject ty, PyObject arg, PyObject kw)
	351	{
	352	char *p;
	353	size_t n = 64;
	354	buf_pyobj *me = 0;
827f89d7	355	static const char *const kwlist[] = { "size", 0 };
46e6ad89	356
827f89d7	357	if (!PyArg_ParseTupleAndKeywords(arg, kw, "\|O&:new", KWLIST,
46e6ad89	358	convszt, &n))
	359	goto end;
	360	me = (buf_pyobj *)ty->tp_alloc(ty, 0);
	361	p = xmalloc(n);
0463996f	362	me->sub = 0;
46e6ad89	363	buf_init(&me->b, p, n);
	364	end:
	365	return ((PyObject *)me);
	366	}
	367
3d8f5f7c	368	static Py_ssize_t wbuf_pysegcount(PyObject me, Py_ssize_t nn)
46e6ad89	369	{ if (nn) *nn = BLEN(BUF_B(me)); return (1); }
46e6ad89	370
3d8f5f7c	371	static Py_ssize_t wbuf_pyreadbuf(PyObject me, Py_ssize_t seg, void *q)
46e6ad89	372	{ assert(seg == 0); *q = BBASE(BUF_B(me)); return (BLEN(BUF_B(me))); }
	373
	374	static PyObject wbmeth_zero(PyObject me, PyObject *arg)
	375	{
	376	void *p;
	377	size_t n;
	378	if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
	379	ensure(me, n);
	380	p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
	381	memset(p, 0, n);
	382	RETURN_ME;
	383	}
	384
	385	static PyObject wbmeth_put(PyObject me, PyObject *arg)
	386	{
67c75893 MW	387	struct bin in;
	388	if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
	389	ensure(me, in.sz);
	390	buf_put(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));
46e6ad89	391	RETURN_ME;
	392	}
	393
	394	#define WBMETH_PUTU_(n, W, w) \
	395	static PyObject wbmeth_putu##w(PyObject me, PyObject *arg) \
	396	{ \
	397	uint##n i; \
	398	if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0); \
	399	ensure(me, SZ_##n); \
	400	buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me))); \
	401	RETURN_ME; \
	402	}
	403	DOUINTCONV(WBMETH_PUTU_)
	404
9fa70ff7	405	#define MASKz 0
46e6ad89	406	#define SZ_z 1
	407	#define WBMETH_PUTBLK_(n, W, w) \
	408	static PyObject wbmeth_putblk##w(PyObject me, PyObject *arg) \
	409	{ \
67c75893 MW	410	struct bin in; \
	411	if (!PyArg_ParseTuple(arg, "O&:putblk" #w, convbin, &in)) goto end; \
	412	if (MASK##W && in.sz > MASK##W) VALERR("too large"); \
	413	ensure(me, in.sz + SZ_##n); \
	414	buf_putmem##w(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me))); \
46e6ad89	415	RETURN_ME; \
9fa70ff7 MW	416	end: \
9fa70ff7 MW	417	return (0); \
46e6ad89	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);
f52568b4	444	ensure(me, EC_ATINF(&pt) ? 2 : 6 + mp_octets(pt.x) + mp_octets(pt.y));
46e6ad89	445	buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	446	EC_DESTROY(&pt);
	447	RETURN_ME;
	448	}
	449
	450	static PyObject wbmeth_putecptraw(PyObject me, PyObject *arg)
	451	{
	452	PyObject *ptobj;
	453	ec pt = EC_INIT;
	454	if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
	455	return (0);
	456	EC_OUT(ECPT_C(ptobj), &pt, ECPT_P(ptobj));
	457	ensure(me, ECPT_C(ptobj)->f->noctets * 2 + 1);
	458	ec_putraw(ECPT_C(ptobj), BUF_B(me), &pt); assert(BOK(BUF_B(me)));
	459	EC_DESTROY(&pt);
	460	RETURN_ME;
	461	}
	462
	463	static PyObject wbmeth_putge(PyObject me, PyObject *arg)
	464	{
	465	PyObject *geobj;
	466	if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
	467	ensure(me, GE_G(geobj)->noctets);
	468	G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
	469	RETURN_ME;
	470	}
	471
	472	static PyObject wbmeth_putgeraw(PyObject me, PyObject *arg)
	473	{
	474	PyObject *geobj;
	475	if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
	476	ensure(me, GE_G(geobj)->noctets);
	477	G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
	478	RETURN_ME;
	479	}
	480
	481	static PyObject wbget_size(PyObject me, void *hunoz)
	482	{ return (PyInt_FromLong(BLEN(BUF_B(me)))); }
	483
0051d10f MW	484	static PyObject wbget_contents(PyObject me, void *hunoz)
	485	{ return (bytestring_pywrap(BBASE(BUF_B(me)), BLEN(BUF_B(me)))); }
	486
c90f712e	487	static const PyGetSetDef wbuf_pygetset[] = {
46e6ad89	488	#define GETSETNAME(op, name) wb##op##_##name
d96c882e MW	489	GET (size, "WBUF.size -> SIZE")
d96c882e MW	490	GET (contents, "WBUF.contents -> STR")
46e6ad89	491	#undef GETSETNAME
	492	{ 0 }
	493	};
	494
c90f712e	495	static const PyMethodDef wbuf_pymethods[] = {
46e6ad89	496	#define METHNAME(func) wbmeth_##func
d96c882e MW	497	METH (zero, "WBUF.zero(N)")
d96c882e MW	498	METH (put, "WBUF.put(BYTES)")
46e6ad89	499	#define WBMETH_DECL_PUTU_(n, W, w) \
d96c882e	500	METH(putu##w, "WBUF.putu" #w "(INT)")
46e6ad89	501	DOUINTCONV(WBMETH_DECL_PUTU_)
46e6ad89	502	#define WBMETH_DECL_PUTBLK_(n, W, w) \
d96c882e	503	METH(putblk##w, "WBUF.putblk" #w "(BYTES)")
46e6ad89	504	BUF_DOSUFFIXES(WBMETH_DECL_PUTBLK_)
d96c882e MW	505	METH (putmp, "WBUF.putmp(X)")
	506	METH (putgf, "WBUF.putgf(X)")
	507	METH (putecpt, "WBUF.putecpt(P)")
	508	METH (putecptraw, "WBUF.putecptraw(P)")
	509	METH (putge, "WBUF.putge(X)")
	510	METH (putgeraw, "WBUF.putgeraw(X)")
46e6ad89	511	#undef METHNAME
	512	{ 0 }
	513	};
	514
c90f712e	515	static const PyBufferProcs wbuf_pybuffer = {
46e6ad89	516	wbuf_pyreadbuf, /* @bf_getreadbuffer@ */
	517	0, /* @bf_getwritebuffer@ */
	518	wbuf_pysegcount, /* @bf_getsegcount@ */
	519	0 /* @bf_getcharbuffer@ */
	520	};
	521
c263b05c	522	static const PyTypeObject wbuf_pytype_skel = {
591bf41b	523	PyVarObject_HEAD_INIT(0, 0) /* Header */
c461c9b3	524	"WriteBuffer", /* @tp_name@ */
46e6ad89	525	sizeof(buf_pyobj), /* @tp_basicsize@ */
	526	0, /* @tp_itemsize@ */
	527
	528	buf_pydealloc, /* @tp_dealloc@ */
	529	0, /* @tp_print@ */
	530	0, /* @tp_getattr@ */
	531	0, /* @tp_setattr@ */
	532	0, /* @tp_compare@ */
	533	0, /* @tp_repr@ */
	534	0, /* @tp_as_number@ */
	535	0, /* @tp_as_sequence@ */
	536	0, /* @tp_as_mapping@ */
	537	0, /* @tp_hash@ */
	538	0, /* @tp_call@ */
	539	0, /* @tp_str@ */
	540	0, /* @tp_getattro@ */
	541	0, /* @tp_setattro@ */
c90f712e	542	PYBUFFER(wbuf), /* @tp_as_buffer@ */
46e6ad89	543	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	544	Py_TPFLAGS_BASETYPE,
	545
	546	/* @tp_doc@ */
d96c882e	547	"WriteBuffer([size = ?]): a write buffer.",
46e6ad89	548
	549	0, /* @tp_traverse@ */
	550	0, /* @tp_clear@ */
	551	0, /* @tp_richcompare@ */
	552	0, /* @tp_weaklistoffset@ */
	553	0, /* @tp_iter@ */
963a6148	554	0, /* @tp_iternext@ */
c90f712e	555	PYMETHODS(wbuf), /* @tp_methods@ */
46e6ad89	556	0, /* @tp_members@ */
c90f712e	557	PYGETSET(wbuf), /* @tp_getset@ */
46e6ad89	558	0, /* @tp_base@ */
	559	0, /* @tp_dict@ */
	560	0, /* @tp_descr_get@ */
	561	0, /* @tp_descr_set@ */
	562	0, /* @tp_dictoffset@ */
	563	0, /* @tp_init@ */
	564	PyType_GenericAlloc, /* @tp_alloc@ */
	565	wbuf_pynew, /* @tp_new@ */
	566	0, /* @tp_free@ */
	567	0 /* @tp_is_gc@ */
	568	};
	569
	570	/----- Initialization ----------------------------------------------------/
	571
	572	void buffer_pyinit(void)
	573	{
	574	INITTYPE(rbuf, root);
	575	INITTYPE(wbuf, root);
	576	}
	577
	578	void buffer_pyinsert(PyObject *mod)
	579	{
	580	INSEXC("BufferError", buferr, PyExc_Exception, 0);
	581	INSERT("ReadBuffer", rbuf_pytype);
	582	INSERT("WriteBuffer", wbuf_pytype);
	583	}
	584
	585	/----- That's all, folks -------------------------------------------------/