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

   1 /* -*-c-*-
   2  *
   3  * Reading and writing buffers of stuff
   4  *
   5  * (c) 2005 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Python interface to Catacomb.
  11  *
  12  * Catacomb/Python is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Catacomb/Python is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with Catacomb/Python; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include "catacomb-python.h"
  30
  31 /*----- Read buffers ------------------------------------------------------*/
  32
  33 PyTypeObject *rbuf_pytype;
  34
  35 static PyObject *rbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
  36 {
  37   struct bin in;
  38   void *q;
  39   buf_pyobj *me = 0;
  40   static const char *const kwlist[] = { "data", 0 };
  41
  42   if (!PyArg_ParseTupleAndKeywords(arg, kw, "O&:new", KWLIST, convbin, &in))
  43     goto end;
  44   q = xmalloc(in.sz);
  45   memcpy(q, in.p, in.sz);
  46   me = (buf_pyobj *)ty->tp_alloc(ty, 0);
  47   me->sub = 0; me->lk = 0;
  48   buf_init(&me->b, q, in.sz);
  49 end:
  50   return ((PyObject *)me);
  51 }
  52
  53 static void buf_pydealloc(PyObject *me)
  54 {
  55   assert(!BUF_LK(me));
  56   if (BUF_SUB(me)) Py_DECREF(BUF_SUB(me));
  57   else xfree(BBASE(BUF_B(me)));
  58   FREEOBJ(me);
  59 }
  60
  61 #ifdef PY3
  62   static int rbuf_pygetbuf(PyObject *me, Py_buffer *vw, int f)
  63   {
  64     buf *b = BUF_B(me);
  65     return (PyBuffer_FillInfo(vw, me, BCUR(b), BLEFT(b), 1, f));
  66   }
  67 #else
  68   static Py_ssize_t rbuf_pysegcount(PyObject *me, Py_ssize_t *nn)
  69     { if (nn) *nn = BSZ(BUF_B(me)); return (1); }
  70   static Py_ssize_t rbuf_pyreadbuf(PyObject *me, Py_ssize_t seg, void **q)
  71     { assert(seg == 0); *q = BCUR(BUF_B(me)); return (BLEFT(BUF_B(me))); }
  72 #endif
  73
  74 static PyObject *rbmeth_skip(PyObject *me, PyObject *arg)
  75 {
  76   size_t n;
  77
  78   if (!PyArg_ParseTuple(arg, "O&:skip", convszt, &n)) goto end;
  79   if (!buf_get(BUF_B(me), n)) BUFERR("buffer exhausted");
  80   RETURN_ME;
  81 end:
  82   return (0);
  83 }
  84
  85 static PyObject *rbmeth_get(PyObject *me, PyObject *arg)
  86 {
  87   void *p;
  88   size_t n;
  89
  90   if (!PyArg_ParseTuple(arg, "O&:get", convszt, &n)) goto end;
  91   if ((p = buf_get(BUF_B(me), n)) == 0) BUFERR("buffer exhausted");
  92   return (bytestring_pywrap(p, n));
  93 end:
  94   return (0);
  95 }
  96
  97 #define RBMETH_GETU_(n, W, w)                                           \
  98   static PyObject *rbmeth_getu##w(PyObject *me)                         \
  99   {                                                                     \
 100     uint##n x;                                                          \
 101     if (buf_getu##w(BUF_B(me), &x)) BUFERR("buffer exhausted");         \
 102     if (MASK##W <= ULONG_MAX) return (getulong(x));                     \
 103     else { kludge64 y; ASSIGN64(y, x); return (getk64(y)); }            \
 104   end:                                                                  \
 105     return (0);                                                         \
 106   }
 107 DOUINTCONV(RBMETH_GETU_)
 108
 109 #define RBMETH_GETBLK_(n, W, w)                                         \
 110   static PyObject *rbmeth_getblk##w(PyObject *me)                       \
 111   {                                                                     \
 112     size_t sz;                                                          \
 113     char *q;                                                            \
 114     if ((q = buf_getmem##w(BUF_B(me), &sz)) == 0)                       \
 115       BUFERR("buffer exhausted");                                       \
 116     return (bytestring_pywrap(q, sz));                                  \
 117   end:                                                                  \
 118     return (0);                                                         \
 119   }
 120 BUF_DOSUFFIXES(RBMETH_GETBLK_)
 121
 122 #define RBMETH_GETBUF_(n, W, w)                                         \
 123   static PyObject *rbmeth_getbuf##w(PyObject *me)                       \
 124   {                                                                     \
 125     buf_pyobj *b;                                                       \
 126     buf bb;                                                             \
 127     if (buf_getbuf##w(BUF_B(me), &bb)) BUFERR("buffer exhausted");      \
 128     b = PyObject_NEW(buf_pyobj, rbuf_pytype);                           \
 129     b->b = bb;                                                          \
 130     b->sub = me;                                                        \
 131     b->lk = 0;                                                          \
 132     Py_INCREF(me);                                                      \
 133     return ((PyObject *)b);                                             \
 134   end:                                                                  \
 135     return (0);                                                         \
 136   }
 137 BUF_DOSUFFIXES(RBMETH_GETBUF_)
 138
 139 static PyObject *rbmeth_getmp(PyObject *me)
 140 {
 141   mp *x;
 142   if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
 143   return (mp_pywrap(x));
 144 end:
 145   return (0);
 146 }
 147
 148 static PyObject *rbmeth_getgf(PyObject *me)
 149 {
 150   mp *x;
 151   if ((x = buf_getmp(BUF_B(me))) == 0) BUFERR("buffer exhausted");
 152   return (gf_pywrap(x));
 153 end:
 154   return (0);
 155 }
 156
 157 static PyObject *rbmeth_getecpt(PyObject *me, PyObject *arg, PyObject *kw)
 158 {
 159   PyObject *cobj = Py_None;
 160   static const char *const kwlist[] = { "curve", 0 };
 161   ec pt = EC_INIT;
 162   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:getecpt", KWLIST, &cobj))
 163     goto end;
 164   if (cobj == Py_None) cobj = (PyObject *)ecpt_pytype;
 165   if (!PyType_Check(cobj) ||
 166       !PyType_IsSubtype((PyTypeObject *)cobj, ecpt_pytype))
 167     TYERR("expected elliptic curve type");
 168   if (buf_getec(BUF_B(me), &pt)) BUFERR("buffer exhausted");
 169   return (ecpt_pywrapout(cobj, &pt));
 170 end:
 171   return (0);
 172 }
 173
 174 static PyObject *rbmeth_getecptraw(PyObject *me, PyObject *arg)
 175 {
 176   PyObject *cobj;
 177   ec pt = EC_INIT;
 178   PyObject *rc = 0;
 179   if (!PyArg_ParseTuple(arg, "O!:getecptraw", eccurve_pytype, &cobj))
 180     goto end;
 181   if (ec_getraw(ECCURVE_C(cobj), BUF_B(me), &pt)) BUFERR("buffer exhausted");
 182   rc = ecpt_pywrapout(cobj, &pt);
 183 end:
 184   return (rc);
 185 }
 186
 187 static PyObject *rbmeth_getge(PyObject *me, PyObject *arg)
 188 {
 189   PyObject *gobj;
 190   ge *x = 0;
 191   if (!PyArg_ParseTuple(arg, "O!:getge", group_pytype, &gobj)) goto end;
 192   x = G_CREATE(GROUP_G(gobj));
 193   if (G_FROMBUF(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
 194   return (ge_pywrap(gobj, x));
 195 end:
 196   if (x) G_DESTROY(GROUP_G(gobj), x);
 197   return (0);
 198 }
 199
 200 static PyObject *rbmeth_getgeraw(PyObject *me, PyObject *arg)
 201 {
 202   PyObject *gobj;
 203   ge *x = 0;
 204   if (!PyArg_ParseTuple(arg, "O!:getgeraw", group_pytype, &gobj)) goto end;
 205   x = G_CREATE(GROUP_G(gobj));
 206   if (G_FROMRAW(GROUP_G(gobj), BUF_B(me), x)) BUFERR("buffer exhausted");
 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 *rbget_size(PyObject *me, void *hunoz)
 214   { return (PyInt_FromLong(BSZ(BUF_B(me)))); }
 215 static PyObject *rbget_left(PyObject *me, void *hunoz)
 216   { return (PyInt_FromLong(BLEFT(BUF_B(me)))); }
 217 static PyObject *rbget_endp(PyObject *me, void *hunoz)
 218   { return (getbool(!BLEFT(BUF_B(me)))); }
 219 static PyObject *rbget_offset(PyObject *me, void *hunoz)
 220   { return (PyInt_FromLong(BLEN(BUF_B(me)))); }
 221 static int rbset_offset(PyObject *me, PyObject *x, void *hunoz)
 222 {
 223   size_t n;
 224   if (!x) NIERR("__del__");
 225   if (!convszt(x, &n)) goto end;
 226   if (n > BSZ(BUF_B(me))) VALERR("out of range");
 227   BCUR(BUF_B(me)) = BBASE(BUF_B(me)) + n;
 228   return (0);
 229 end:
 230   return (-1);
 231 }
 232
 233 static const PyGetSetDef rbuf_pygetset[] = {
 234 #define GETSETNAME(op, name) rb##op##_##name
 235   GET   (size,          "RBUF.size -> SIZE")
 236   GET   (left,          "RBUF.left -> REMAINDER")
 237   GET   (endp,          "RBUF.endp -> BOOL")
 238   GETSET(offset,        "RBUF.offset -> OFFSET")
 239 #undef GETSETNAME
 240   { 0 }
 241 };
 242
 243 static const PyMethodDef rbuf_pymethods[] = {
 244 #define METHNAME(func) rbmeth_##func
 245   METH  (skip,          "RBUF.skip(N)")
 246   METH  (get,           "RBUF.get(N) -> BYTES")
 247 #define RBMETH_DECL_GETU_(n, W, w)                                      \
 248     NAMETH(getu##w,     "RBUF.getu" #w "() -> INT")
 249   DOUINTCONV(RBMETH_DECL_GETU_)
 250 #define RBMETH_DECL_GETBLK_(n, W, w)                                    \
 251     NAMETH(getblk##w,   "RBUF.getblk" #w "() -> BYTES")
 252   BUF_DOSUFFIXES(RBMETH_DECL_GETBLK_)
 253 #define RBMETH_DECL_GETBUF_(n, W, w)                                    \
 254     NAMETH(getbuf##w,   "RBUF.getbuf" #w "() -> RBUF'")
 255   BUF_DOSUFFIXES(RBMETH_DECL_GETBUF_)
 256   NAMETH(getmp,         "RBUF.getmp() -> X")
 257   NAMETH(getgf,         "RBUF.getgf() -> X")
 258   KWMETH(getecpt,       "RBUF.getecpt([curve = None]) -> P")
 259   METH  (getecptraw,    "RBUF.getecptraw(CURVE) -> P")
 260   METH  (getge,         "RBUF.getge(GROUP) -> X")
 261   METH  (getgeraw,      "RBUF.getgeraw(GROUP) -> X")
 262 #undef METHNAME
 263   { 0 }
 264 };
 265
 266 static const PyBufferProcs rbuf_pybuffer = {
 267 #ifdef PY3
 268   rbuf_pygetbuf,                        /* @bf_getbuffer@ */
 269   0,                                    /* @bf_releasebuffer@ */
 270 #else
 271   rbuf_pyreadbuf,                       /* @bf_getreadbuffer@ */
 272   0,                                    /* @bf_getwritebuffer@ */
 273   rbuf_pysegcount,                      /* @bf_getsegcount@ */
 274   0                                     /* @bf_getcharbuffer@ */
 275 #endif
 276 };
 277
 278 static const PyTypeObject rbuf_pytype_skel = {
 279   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 280   "ReadBuffer",                         /* @tp_name@ */
 281   sizeof(buf_pyobj),                    /* @tp_basicsize@ */
 282   0,                                    /* @tp_itemsize@ */
 283
 284   buf_pydealloc,                        /* @tp_dealloc@ */
 285   0,                                    /* @tp_print@ */
 286   0,                                    /* @tp_getattr@ */
 287   0,                                    /* @tp_setattr@ */
 288   0,                                    /* @tp_compare@ */
 289   0,                                    /* @tp_repr@ */
 290   0,                                    /* @tp_as_number@ */
 291   0,                                    /* @tp_as_sequence@ */
 292   0,                                    /* @tp_as_mapping@ */
 293   0,                                    /* @tp_hash@ */
 294   0,                                    /* @tp_call@ */
 295   0,                                    /* @tp_str@ */
 296   0,                                    /* @tp_getattro@ */
 297   0,                                    /* @tp_setattro@ */
 298   PYBUFFER(rbuf),                       /* @tp_as_buffer@ */
 299   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 300     Py_TPFLAGS_BASETYPE,
 301
 302   /* @tp_doc@ */
 303   "ReadBuffer(STR): a read buffer.",
 304
 305   0,                                    /* @tp_traverse@ */
 306   0,                                    /* @tp_clear@ */
 307   0,                                    /* @tp_richcompare@ */
 308   0,                                    /* @tp_weaklistoffset@ */
 309   0,                                    /* @tp_iter@ */
 310   0,                                    /* @tp_iternext@ */
 311   PYMETHODS(rbuf),                      /* @tp_methods@ */
 312   0,                                    /* @tp_members@ */
 313   PYGETSET(rbuf),                       /* @tp_getset@ */
 314   0,                                    /* @tp_base@ */
 315   0,                                    /* @tp_dict@ */
 316   0,                                    /* @tp_descr_get@ */
 317   0,                                    /* @tp_descr_set@ */
 318   0,                                    /* @tp_dictoffset@ */
 319   0,                                    /* @tp_init@ */
 320   PyType_GenericAlloc,                  /* @tp_alloc@ */
 321   rbuf_pynew,                           /* @tp_new@ */
 322   0,                                    /* @tp_free@ */
 323   0                                     /* @tp_is_gc@ */
 324 };
 325
 326 /*----- Write buffers -----------------------------------------------------*/
 327
 328 PyTypeObject *wbuf_pytype;
 329
 330 int ensurebuf(PyObject *me, size_t n)
 331 {
 332   buf *b = BUF_B(me);
 333   size_t nn = BSZ(b);
 334   octet *p;
 335   size_t want = BLEN(b) + n;
 336
 337   if (BLEFT(b) >= n)
 338     return (0);
 339   else if (BUF_LK(me))
 340     BUFERR("buffer locked");
 341   else {
 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     return (0);
 348   }
 349 end:
 350   return (-1);
 351 }
 352
 353 static PyObject *wbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
 354 {
 355   char *p;
 356   size_t n = 64;
 357   buf_pyobj *me = 0;
 358   static const char *const kwlist[] = { "size", 0 };
 359
 360   if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O&:new", KWLIST,
 361                                    convszt, &n))
 362     goto end;
 363   me = (buf_pyobj *)ty->tp_alloc(ty, 0);
 364   p = xmalloc(n);
 365   me->sub = 0; me->lk = 0;
 366   buf_init(&me->b, p, n);
 367 end:
 368   return ((PyObject *)me);
 369 }
 370
 371 #ifdef PY3
 372   static int wbuf_pygetbuf(PyObject *me, Py_buffer *vw, int f)
 373   {
 374     buf *b = BUF_B(me);
 375     if (PyBuffer_FillInfo(vw, me, BBASE(b), BLEN(b), 0, f)) return (-1);
 376     BUF_LK(me)++; return (0);
 377   }
 378   static void wbuf_pyrlsbuf(PyObject *me, Py_buffer *vw)
 379     { BUF_LK(me)--; }
 380 #else
 381   static Py_ssize_t wbuf_pysegcount(PyObject *me, Py_ssize_t *nn)
 382     { if (nn) *nn = BLEN(BUF_B(me)); return (1); }
 383   static Py_ssize_t wbuf_pyreadbuf(PyObject *me, Py_ssize_t seg, void **q)
 384     { assert(seg == 0); *q = BBASE(BUF_B(me)); return (BLEN(BUF_B(me))); }
 385 #endif
 386
 387 static PyObject *wbmeth_zero(PyObject *me, PyObject *arg)
 388 {
 389   void *p;
 390   size_t n;
 391   if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
 392   if (ensurebuf(me, n)) return (0);
 393   p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
 394   memset(p, 0, n);
 395   RETURN_ME;
 396 }
 397
 398 static PyObject *wbmeth_put(PyObject *me, PyObject *arg)
 399 {
 400   struct bin in;
 401   if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
 402   if (ensurebuf(me, in.sz)) return (0);
 403   buf_put(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));
 404   RETURN_ME;
 405 }
 406
 407 #define WBMETH_PUTU_(n, W, w)                                           \
 408   static PyObject *wbmeth_putu##w(PyObject *me, PyObject *arg)          \
 409   {                                                                     \
 410     uint##n i;                                                          \
 411     if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0); \
 412     if (ensurebuf(me, SZ_##n)) return (0);                              \
 413     buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me)));                  \
 414     RETURN_ME;                                                          \
 415   }
 416 DOUINTCONV(WBMETH_PUTU_)
 417
 418 #define MASKz 0
 419 #define SZ_z 1
 420 #define WBMETH_PUTBLK_(n, W, w)                                         \
 421   static PyObject *wbmeth_putblk##w(PyObject *me, PyObject *arg)        \
 422   {                                                                     \
 423     struct bin in;                                                      \
 424     if (!PyArg_ParseTuple(arg, "O&:putblk" #w, convbin, &in)) goto end; \
 425     if (MASK##W && in.sz > MASK##W) VALERR("too large");                \
 426     if (ensurebuf(me, in.sz + SZ_##n)) return (0);                      \
 427     buf_putmem##w(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));      \
 428     RETURN_ME;                                                          \
 429   end:                                                                  \
 430     return (0);                                                         \
 431   }
 432 BUF_DOSUFFIXES(WBMETH_PUTBLK_)
 433
 434 static PyObject *wbmeth_putmp(PyObject *me, PyObject *arg)
 435 {
 436   mp *x = 0;
 437   if (!PyArg_ParseTuple(arg, "O&:putmp", convmp, &x)) return (0);
 438   if (ensurebuf(me, mp_octets(x) + 2)) return (0);
 439   buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
 440   RETURN_ME;
 441 }
 442
 443 static PyObject *wbmeth_putgf(PyObject *me, PyObject *arg)
 444 {
 445   mp *x = 0;
 446   if (!PyArg_ParseTuple(arg, "O&:putgf", convgf, &x)) return (0);
 447   if (ensurebuf(me, mp_octets(x) + 2)) return (0);
 448   buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
 449   MP_DROP(x);
 450   RETURN_ME;
 451 }
 452
 453 static PyObject *wbmeth_putecpt(PyObject *me, PyObject *arg)
 454 {
 455   ec pt = EC_INIT;
 456   if (!PyArg_ParseTuple(arg, "O&:putecpt", convecpt, &pt)) return (0);
 457   if (ensurebuf(me, EC_ATINF(&pt) ? 2 :
 458                 6 + mp_octets(pt.x) + mp_octets(pt.y)))
 459     return (0);
 460   buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
 461   EC_DESTROY(&pt);
 462   RETURN_ME;
 463 }
 464
 465 static PyObject *wbmeth_putecptraw(PyObject *me, PyObject *arg)
 466 {
 467   PyObject *ptobj;
 468   ec_curve *cc;
 469   ec pt = EC_INIT;
 470   if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
 471     return (0);
 472   cc = ECPT_C(ptobj);
 473   EC_OUT(cc, &pt, ECPT_P(ptobj));
 474   if (ensurebuf(me, 2*cc->f->noctets + 1)) return (0);
 475   ec_putraw(cc, BUF_B(me), &pt); assert(BOK(BUF_B(me)));
 476   EC_DESTROY(&pt);
 477   RETURN_ME;
 478 }
 479
 480 static PyObject *wbmeth_putge(PyObject *me, PyObject *arg)
 481 {
 482   PyObject *geobj;
 483   if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
 484   if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
 485   G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
 486   RETURN_ME;
 487 }
 488
 489 static PyObject *wbmeth_putgeraw(PyObject *me, PyObject *arg)
 490 {
 491   PyObject *geobj;
 492   if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
 493   if (ensurebuf(me, GE_G(geobj)->noctets)) return (0);
 494   G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
 495   RETURN_ME;
 496 }
 497
 498 static PyObject *wbget_size(PyObject *me, void *hunoz)
 499   { return (PyInt_FromLong(BLEN(BUF_B(me)))); }
 500
 501 static PyObject *wbget_contents(PyObject *me, void *hunoz)
 502   { return (bytestring_pywrap(BBASE(BUF_B(me)), BLEN(BUF_B(me)))); }
 503
 504 static const PyGetSetDef wbuf_pygetset[] = {
 505 #define GETSETNAME(op, name) wb##op##_##name
 506   GET   (size,          "WBUF.size -> SIZE")
 507   GET   (contents,      "WBUF.contents -> STR")
 508 #undef GETSETNAME
 509   { 0 }
 510 };
 511
 512 static const PyMethodDef wbuf_pymethods[] = {
 513 #define METHNAME(func) wbmeth_##func
 514   METH  (zero,          "WBUF.zero(N)")
 515   METH  (put,           "WBUF.put(BYTES)")
 516 #define WBMETH_DECL_PUTU_(n, W, w)                                      \
 517     METH(putu##w,       "WBUF.putu" #w "(INT)")
 518   DOUINTCONV(WBMETH_DECL_PUTU_)
 519 #define WBMETH_DECL_PUTBLK_(n, W, w)                                    \
 520     METH(putblk##w,     "WBUF.putblk" #w "(BYTES)")
 521   BUF_DOSUFFIXES(WBMETH_DECL_PUTBLK_)
 522   METH  (putmp,         "WBUF.putmp(X)")
 523   METH  (putgf,         "WBUF.putgf(X)")
 524   METH  (putecpt,       "WBUF.putecpt(P)")
 525   METH  (putecptraw,    "WBUF.putecptraw(P)")
 526   METH  (putge,         "WBUF.putge(X)")
 527   METH  (putgeraw,      "WBUF.putgeraw(X)")
 528 #undef METHNAME
 529   { 0 }
 530 };
 531
 532 static const PyBufferProcs wbuf_pybuffer = {
 533 #ifdef PY3
 534   wbuf_pygetbuf,                        /* @bf_getbuffer@ */
 535   wbuf_pyrlsbuf                         /* @bf_releasebuffer@ */
 536 #else
 537   wbuf_pyreadbuf,                       /* @bf_getreadbuffer@ */
 538   0,                                    /* @bf_getwritebuffer@ */
 539   wbuf_pysegcount,                      /* @bf_getsegcount@ */
 540   0                                     /* @bf_getcharbuffer@ */
 541 #endif
 542 };
 543
 544 static const PyTypeObject wbuf_pytype_skel = {
 545   PyVarObject_HEAD_INIT(0, 0)           /* Header */
 546   "WriteBuffer",                        /* @tp_name@ */
 547   sizeof(buf_pyobj),                    /* @tp_basicsize@ */
 548   0,                                    /* @tp_itemsize@ */
 549
 550   buf_pydealloc,                        /* @tp_dealloc@ */
 551   0,                                    /* @tp_print@ */
 552   0,                                    /* @tp_getattr@ */
 553   0,                                    /* @tp_setattr@ */
 554   0,                                    /* @tp_compare@ */
 555   0,                                    /* @tp_repr@ */
 556   0,                                    /* @tp_as_number@ */
 557   0,                                    /* @tp_as_sequence@ */
 558   0,                                    /* @tp_as_mapping@ */
 559   0,                                    /* @tp_hash@ */
 560   0,                                    /* @tp_call@ */
 561   0,                                    /* @tp_str@ */
 562   0,                                    /* @tp_getattro@ */
 563   0,                                    /* @tp_setattro@ */
 564   PYBUFFER(wbuf),                       /* @tp_as_buffer@ */
 565   Py_TPFLAGS_DEFAULT |                  /* @tp_flags@ */
 566     Py_TPFLAGS_BASETYPE,
 567
 568   /* @tp_doc@ */
 569   "WriteBuffer([size = ?]): a write buffer.",
 570
 571   0,                                    /* @tp_traverse@ */
 572   0,                                    /* @tp_clear@ */
 573   0,                                    /* @tp_richcompare@ */
 574   0,                                    /* @tp_weaklistoffset@ */
 575   0,                                    /* @tp_iter@ */
 576   0,                                    /* @tp_iternext@ */
 577   PYMETHODS(wbuf),                      /* @tp_methods@ */
 578   0,                                    /* @tp_members@ */
 579   PYGETSET(wbuf),                       /* @tp_getset@ */
 580   0,                                    /* @tp_base@ */
 581   0,                                    /* @tp_dict@ */
 582   0,                                    /* @tp_descr_get@ */
 583   0,                                    /* @tp_descr_set@ */
 584   0,                                    /* @tp_dictoffset@ */
 585   0,                                    /* @tp_init@ */
 586   PyType_GenericAlloc,                  /* @tp_alloc@ */
 587   wbuf_pynew,                           /* @tp_new@ */
 588   0,                                    /* @tp_free@ */
 589   0                                     /* @tp_is_gc@ */
 590 };
 591
 592 /*----- Initialization ----------------------------------------------------*/
 593
 594 PyObject *buferr;
 595
 596 void buffer_pyinit(void)
 597 {
 598   INITTYPE(rbuf, root);
 599   INITTYPE(wbuf, root);
 600 }
 601
 602 void buffer_pyinsert(PyObject *mod)
 603 {
 604   INSEXC("BufferError", buferr, PyExc_Exception, 0);
 605   INSERT("ReadBuffer", rbuf_pytype);
 606   INSERT("WriteBuffer", wbuf_pytype);
 607 }
 608
 609 /*----- That's all, folks -------------------------------------------------*/