[catacomb-python] / bytestring.c

/* -*-c-*-
 *
 * 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;

static PyObject *dowrap(PyTypeObject *ty, const void *p, size_t n)
{
  PyStringObject *x = (PyStringObject *)ty->tp_alloc(ty, n);
  if (p) memcpy(x->ob_sval, p, n);
  x->ob_sval[n] = 0;
#if defined(CACHE_HASH) || PY_VERSION_HEX >= 0x02030000
  x->ob_shash = -1;
#endif
  x->ob_sstate = SSTATE_NOT_INTERNED;
  return ((PyObject *)x);
}

PyObject *bytestring_pywrap(const void *p, size_t n)
  { return (dowrap(bytestring_pytype, p, n)); }

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

static PyObject *bytestring_pynew(PyTypeObject *ty,
				  PyObject *arg, PyObject *kw)
{
  const char *p;
  Py_ssize_t n;
  static char *kwlist[] = { "data", 0 };
  if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n))
    return (0);
  return (dowrap(ty, p, n));
}

static PyObject *meth_ctstreq(PyObject *me, PyObject *arg)
{
  char *p, *q;
  Py_ssize_t psz, qsz;
  if (!PyArg_ParseTuple(arg, "s#s#:ctstreq", &p, &psz, &q, &qsz))
    goto end;
  if (psz == qsz && ct_memeq(p, q, psz)) RETURN_TRUE;
  else RETURN_FALSE;
end:
  return (0);
}

static PyObject *meth__ByteString_zero(PyObject *me, PyObject *arg)
{
  size_t sz;
  PyObject *rc = 0;
  if (!PyArg_ParseTuple(arg, "OO&:zero", &me, convszt, &sz)) goto end;
  rc = bytestring_pywrap(0, sz);
  memset(PyString_AS_STRING(rc), 0, sz);
end:
  return (rc);
}

static PyObject *bytestring_pyrichcompare(PyObject *me,
					  PyObject *you, int op)
{
  int b;
  void *mystr, *yourstr;
  Py_ssize_t mylen, yourlen, minlen;

  if (!PyString_Check(me) || !PyString_Check(you)) RETURN_NOTIMPL;
  mystr = PyString_AS_STRING(me); mylen = PyString_GET_SIZE(me);
  yourstr = PyString_AS_STRING(you); yourlen = PyString_GET_SIZE(you);

  switch (op) {
    case Py_EQ:
      b = mylen == yourlen && ct_memeq(mystr, yourstr, mylen);
      break;
    case Py_NE:
      b = mylen != yourlen || !ct_memeq(mystr, yourstr, mylen);
      break;
    default:
      minlen = mylen < yourlen ? mylen : yourlen;
      b = memcmp(mystr, yourstr, minlen);
      if (!b) b = mylen < yourlen ? -1 : mylen > yourlen ? +1 : 0;
      switch (op) {
	case Py_LT: b = b <  0; break;
	case Py_LE: b = b <= 0; break;
	case Py_GE: b = b >= 0; break;
	case Py_GT: b = b >  0; break;
	default: abort();
      }
  }
  if (b) RETURN_TRUE;
  else RETURN_FALSE;
}

#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;							\
    Py_ssize_t 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;							\
    Py_ssize_t 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(0) 0,		/* Header */
  "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@ */
  bytestring_pyrichcompare,		/* @tp_richcompare@ */
  0,					/* @tp_weaklistoffset@ */
  0,					/* @tp_iter@ */
  0,					/* @tp_iternext@ */
  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@ */
  bytestring_pynew,			/* @tp_new@ */
  0,					/* @tp_free@ */
  0					/* @tp_is_gc@ */
};

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

static PyMethodDef methods[] = {
#define METHNAME(func) meth_##func
  METH  (ctstreq,		"ctstreq(S, T) -> BOOL")
  METH	(_ByteString_zero,	"zero(N) -> 0000...00")
#undef METHNAME
  { 0 }
};

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

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

/*----- That's all, folks -------------------------------------------------*/
Commit	Line	Data
d7ab1bab	1	/* --c--
d7ab1bab	2	*
	3	* Byte strings
	4	*
	5	* (c) 2004 Straylight/Edgeware
	6	*/
	7
b2687a0a	8	/----- Licensing notice --------------------------------------------------
d7ab1bab	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	*
d7ab1bab	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	*
d7ab1bab	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	/----- Main code ---------------------------------------------------------/
	32
	33	PyTypeObject *bytestring_pytype;
	34
46e6ad89	35	static PyObject dowrap(PyTypeObject ty, const void *p, size_t n)
d7ab1bab	36	{
46e6ad89	37	PyStringObject x = (PyStringObject )ty->tp_alloc(ty, n);
d7ab1bab	38	if (p) memcpy(x->ob_sval, p, n);
d7ab1bab	39	x->ob_sval[n] = 0;
69e13768	40	#if defined(CACHE_HASH) \|\| PY_VERSION_HEX >= 0x02030000
d7ab1bab	41	x->ob_shash = -1;
d7ab1bab	42	#endif
3aa33042	43	x->ob_sstate = SSTATE_NOT_INTERNED;
d7ab1bab	44	return ((PyObject *)x);
	45	}
	46
46e6ad89	47	PyObject bytestring_pywrap(const void p, size_t n)
	48	{ return (dowrap(bytestring_pytype, p, n)); }
	49
d7ab1bab	50	PyObject bytestring_pywrapbuf(buf b)
46e6ad89	51	{ return (dowrap(bytestring_pytype, BCUR(b), BLEFT(b))); }
	52
	53	static PyObject bytestring_pynew(PyTypeObject ty,
	54	PyObject arg, PyObject kw)
	55	{
	56	const char *p;
6b54260d	57	Py_ssize_t n;
46e6ad89	58	static char *kwlist[] = { "data", 0 };
	59	if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", kwlist, &p, &n))
	60	return (0);
	61	return (dowrap(ty, p, n));
	62	}
d7ab1bab	63
2a21aec7	64	static PyObject meth_ctstreq(PyObject me, PyObject *arg)
bfb450cc MW	65	{
	66	char p, q;
	67	Py_ssize_t psz, qsz;
2a21aec7	68	if (!PyArg_ParseTuple(arg, "s#s#:ctstreq", &p, &psz, &q, &qsz))
bfb450cc MW	69	goto end;
	70	if (psz == qsz && ct_memeq(p, q, psz)) RETURN_TRUE;
	71	else RETURN_FALSE;
	72	end:
	73	return (0);
	74	}
	75
5a8b43b3 MW	76	static PyObject meth__ByteString_zero(PyObject me, PyObject *arg)
	77	{
	78	size_t sz;
	79	PyObject *rc = 0;
	80	if (!PyArg_ParseTuple(arg, "OO&:zero", &me, convszt, &sz)) goto end;
	81	rc = bytestring_pywrap(0, sz);
	82	memset(PyString_AS_STRING(rc), 0, sz);
	83	end:
	84	return (rc);
	85	}
	86
bfb450cc MW	87	static PyObject bytestring_pyrichcompare(PyObject me,
	88	PyObject *you, int op)
	89	{
	90	int b;
	91	void mystr, yourstr;
	92	Py_ssize_t mylen, yourlen, minlen;
	93
	94	if (!PyString_Check(me) \|\| !PyString_Check(you)) RETURN_NOTIMPL;
	95	mystr = PyString_AS_STRING(me); mylen = PyString_GET_SIZE(me);
	96	yourstr = PyString_AS_STRING(you); yourlen = PyString_GET_SIZE(you);
	97
	98	switch (op) {
	99	case Py_EQ:
	100	b = mylen == yourlen && ct_memeq(mystr, yourstr, mylen);
	101	break;
	102	case Py_NE:
	103	b = mylen != yourlen \|\| !ct_memeq(mystr, yourstr, mylen);
	104	break;
	105	default:
	106	minlen = mylen < yourlen ? mylen : yourlen;
	107	b = memcmp(mystr, yourstr, minlen);
	108	if (!b) b = mylen < yourlen ? -1 : mylen > yourlen ? +1 : 0;
	109	switch (op) {
	110	case Py_LT: b = b < 0; break;
	111	case Py_LE: b = b <= 0; break;
	112	case Py_GE: b = b >= 0; break;
	113	case Py_GT: b = b > 0; break;
	114	default: abort();
	115	}
	116	}
	117	if (b) RETURN_TRUE;
	118	else RETURN_FALSE;
	119	}
	120
d7ab1bab	121	#define BINOP(name, op) \
	122	static PyObject bytestring_py##name(PyObject x, PyObject *y) { \
	123	const void xv, yv; \
	124	const unsigned char xp, yp; \
	125	unsigned char *zp; \
87d705a8	126	Py_ssize_t xsz, ysz; \
d7ab1bab	127	int i; \
	128	PyObject *rc = 0; \
	129	if (PyObject_AsReadBuffer(x, &xv, &xsz) \|\| \
	130	PyObject_AsReadBuffer(y, &yv, &ysz)) \
	131	goto end; \
	132	if (xsz != ysz) VALERR("length mismatch"); \
	133	rc = bytestring_pywrap(0, xsz); \
	134	xp = xv; yp = yv; zp = (unsigned char *)PyString_AS_STRING(rc); \
	135	for (i = xsz; i > 0; i--) zp++ = xp++ op *yp++; \
	136	end: \
	137	return (rc); \
	138	}
	139	BINOP(and, &)
	140	BINOP(or, \|)
	141	BINOP(xor, ^)
	142
	143	#define UNOP(name, op) \
	144	static PyObject bytestring_py##name(PyObject x) { \
	145	const void *xv; \
	146	const unsigned char *xp; \
	147	unsigned char *zp; \
87d705a8	148	Py_ssize_t xsz; \
d7ab1bab	149	int i; \
	150	PyObject *rc = 0; \
	151	if (PyObject_AsReadBuffer(x, &xv, &xsz)) goto end; \
	152	rc = bytestring_pywrap(0, xsz); \
	153	xp = xv; zp = (unsigned char *)PyString_AS_STRING(rc); \
	154	for (i = xsz; i > 0; i--) zp++ = op xp++; \
	155	end: \
	156	return (rc); \
	157	}
	158	UNOP(not, ~)
	159
	160	static PyNumberMethods bytestring_pynumber = {
	161	0, /* @nb_add@ */
	162	0, /* @nb_subtract@ */
	163	0, /* @nb_multiply@ */
	164	0, /* @nb_divide@ */
	165	0, /* @nb_remainder@ */
	166	0, /* @nb_divmod@ */
	167	0, /* @nb_power@ */
	168	0, /* @nb_negative@ */
	169	0, /* @nb_positive@ */
	170	0, /* @nb_absolute@ */
	171	0, /* @nb_nonzero@ */
	172	bytestring_pynot, /* @nb_invert@ */
	173	0, /* @nb_lshift@ */
	174	0, /* @nb_rshift@ */
	175	bytestring_pyand, /* @nb_and@ */
	176	bytestring_pyxor, /* @nb_xor@ */
	177	bytestring_pyor, /* @nb_or@ */
	178	0, /* @nb_coerce@ */
	179	0, /* @nb_int@ */
	180	0, /* @nb_long@ */
	181	0, /* @nb_float@ */
	182	0, /* @nb_oct@ */
	183	0, /* @nb_hex@ */
	184	};
	185
	186	static PyBufferProcs bytestring_pybuffer;
	187
	188	static PyTypeObject bytestring_pytype_skel = {
6d4db0bf	189	PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3	190	"ByteString", /* @tp_name@ */
d7ab1bab	191	0, /* @tp_basicsize@ */
	192	0, /* @tp_itemsize@ */
	193
	194	0, /* @tp_dealloc@ */
	195	0, /* @tp_print@ */
	196	0, /* @tp_getattr@ */
	197	0, /* @tp_setattr@ */
	198	0, /* @tp_compare@ */
	199	0, /* @tp_repr@ */
	200	&bytestring_pynumber, /* @tp_as_number@ */
	201	0, /* @tp_as_sequence@ */
	202	0, /* @tp_as_mapping@ */
	203	0, /* @tp_hash@ */
	204	0, /* @tp_call@ */
	205	0, /* @tp_str@ */
	206	0, /* @tp_getattro@ */
	207	0, /* @tp_setattro@ */
	208	&bytestring_pybuffer, /* @tp_as_buffer@ */
	209	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	210	Py_TPFLAGS_CHECKTYPES \|
	211	Py_TPFLAGS_BASETYPE,
	212
	213	/* @tp_doc@ */
	214	"Byte string class.",
	215
	216	0, /* @tp_traverse@ */
	217	0, /* @tp_clear@ */
bfb450cc	218	bytestring_pyrichcompare, /* @tp_richcompare@ */
d7ab1bab	219	0, /* @tp_weaklistoffset@ */
d7ab1bab	220	0, /* @tp_iter@ */
963a6148	221	0, /* @tp_iternext@ */
d7ab1bab	222	0, /* @tp_methods@ */
	223	0, /* @tp_members@ */
	224	0, /* @tp_getset@ */
	225	0, /* @tp_base@ */
	226	0, /* @tp_dict@ */
	227	0, /* @tp_descr_get@ */
	228	0, /* @tp_descr_set@ */
	229	0, /* @tp_dictoffset@ */
	230	0, /* @tp_init@ */
	231	PyType_GenericAlloc, /* @tp_alloc@ */
46e6ad89	232	bytestring_pynew, /* @tp_new@ */
3aa33042	233	0, /* @tp_free@ */
d7ab1bab	234	0 /* @tp_is_gc@ */
	235	};
	236
	237	/----- Initialization ----------------------------------------------------/
	238
bfb450cc MW	239	static PyMethodDef methods[] = {
	240	#define METHNAME(func) meth_##func
	241	METH (ctstreq, "ctstreq(S, T) -> BOOL")
5a8b43b3	242	METH (_ByteString_zero, "zero(N) -> 0000...00")
bfb450cc MW	243	#undef METHNAME
	244	{ 0 }
	245	};
	246
d7ab1bab	247	#define string_pytype &PyString_Type
	248	void bytestring_pyinit(void)
	249	{
	250	INITTYPE(bytestring, string);
bfb450cc	251	addmethods(methods);
d7ab1bab	252	}
	253
	254	void bytestring_pyinsert(PyObject *mod)
	255	{
	256	INSERT("ByteString", bytestring_pytype);
	257	}
	258
	259	/----- That's all, folks -------------------------------------------------/