Various other little bits.

[catacomb-python] / bytestring.c

/* -*-c-*-
 *
 * $Id$
 *
 * Byte strings
 *
 * (c) 2004 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"

/*----- Main code ---------------------------------------------------------*/

PyTypeObject *bytestring_pytype;

PyObject *bytestring_pywrap(const void *p, size_t n)
{
  PyStringObject *x = PyObject_NewVar(PyStringObject, bytestring_pytype, n);
  if (p) memcpy(x->ob_sval, p, n);
  x->ob_sval[n] = 0;
#ifdef CACHE_HASH
  x->ob_shash = -1;
#endif
  x->ob_sstate = SSTATE_NOT_INTERNED;
  return ((PyObject *)x);
}

PyObject *bytestring_pywrapbuf(buf *b)
  { return bytestring_pywrap(BCUR(b), BLEFT(b)); }

#define BINOP(name, op)							\
  static PyObject *bytestring_py##name(PyObject *x, PyObject *y) {	\
    const void *xv, *yv;						\
    const unsigned char *xp, *yp;					\
    unsigned char *zp;							\
    int xsz, ysz;							\
    int i;								\
    PyObject *rc = 0;							\
    if (PyObject_AsReadBuffer(x, &xv, &xsz) ||				\
	PyObject_AsReadBuffer(y, &yv, &ysz))				\
      goto end;								\
    if (xsz != ysz) VALERR("length mismatch");				\
    rc = bytestring_pywrap(0, xsz);					\
    xp = xv; yp = yv; zp = (unsigned char *)PyString_AS_STRING(rc);	\
    for (i = xsz; i > 0; i--) *zp++ = *xp++ op *yp++;			\
  end:									\
    return (rc);							\
  }
BINOP(and, &)
BINOP(or, |)
BINOP(xor, ^)

#define UNOP(name, op)							\
  static PyObject *bytestring_py##name(PyObject *x) {			\
    const void *xv;							\
    const unsigned char *xp;						\
    unsigned char *zp;							\
    int xsz;								\
    int i;								\
    PyObject *rc = 0;							\
    if (PyObject_AsReadBuffer(x, &xv, &xsz)) goto end;			\
    rc = bytestring_pywrap(0, xsz);					\
    xp = xv; zp = (unsigned char *)PyString_AS_STRING(rc);		\
    for (i = xsz; i > 0; i--) *zp++ = op *xp++;				\
  end:									\
    return (rc);							\
  }
UNOP(not, ~)

static PyNumberMethods bytestring_pynumber = {
  0,					/* @nb_add@ */
  0,					/* @nb_subtract@ */
  0,					/* @nb_multiply@ */
  0,					/* @nb_divide@ */
  0,					/* @nb_remainder@ */
  0,					/* @nb_divmod@ */
  0,					/* @nb_power@ */
  0,					/* @nb_negative@ */
  0,					/* @nb_positive@ */
  0,					/* @nb_absolute@ */
  0,					/* @nb_nonzero@ */
  bytestring_pynot,			/* @nb_invert@ */
  0,					/* @nb_lshift@ */
  0,					/* @nb_rshift@ */
  bytestring_pyand,			/* @nb_and@ */
  bytestring_pyxor,			/* @nb_xor@ */
  bytestring_pyor,			/* @nb_or@ */
  0,					/* @nb_coerce@ */
  0,					/* @nb_int@ */
  0,					/* @nb_long@ */
  0,					/* @nb_float@ */
  0,					/* @nb_oct@ */
  0,					/* @nb_hex@ */
};

static PyBufferProcs bytestring_pybuffer;

static PyTypeObject bytestring_pytype_skel = {
  PyObject_HEAD_INIT(&PyType_Type) 0,	/* Header */
  "catacomb.ByteString",		/* @tp_name@ */
  0,					/* @tp_basicsize@ */
  0,					/* @tp_itemsize@ */

  0,					/* @tp_dealloc@ */
  0,					/* @tp_print@ */
  0,					/* @tp_getattr@ */
  0,					/* @tp_setattr@ */
  0,					/* @tp_compare@ */
  0,					/* @tp_repr@ */
  &bytestring_pynumber,			/* @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@ */
  &bytestring_pybuffer,			/* @tp_as_buffer@ */
  Py_TPFLAGS_DEFAULT |			/* @tp_flags@ */
    Py_TPFLAGS_CHECKTYPES |
    Py_TPFLAGS_BASETYPE,

  /* @tp_doc@ */
"Byte string class.",

  0,					/* @tp_traverse@ */
  0,					/* @tp_clear@ */
  0,					/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternexr@ */
  0,					/* @tp_methods@ */
  0,					/* @tp_members@ */
  0,					/* @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@ */
  0,					/* @tp_new@ */
  0,					/* @tp_free@ */
  0					/* @tp_is_gc@ */
};

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

#define string_pytype &PyString_Type
void bytestring_pyinit(void)
{
  INITTYPE(bytestring, string);
}

void bytestring_pyinsert(PyObject *mod)
{
  INSERT("ByteString", bytestring_pytype);
}

/*----- That's all, folks -------------------------------------------------*/