[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 *empty, *bytev[256];

static PyObject *allocate(PyTypeObject *ty, size_t n)
{
  PyStringObject *x;
  x = (PyStringObject *)ty->tp_alloc(ty, 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);
}

static PyObject *dowrap(PyTypeObject *ty, const void *p, size_t n)
{
  PyObject *x;
  int ch;

  if (p && ty == bytestring_pytype) {
    if (!n) {
      if (!empty) empty = allocate(ty, 0);
      Py_INCREF(empty); return (empty);
    } else if (n == 1 && (ch = *(unsigned char *)p) < sizeof(bytev)) {
      if (!bytev[ch])
	{ bytev[ch] = allocate(ty, 1); *PyString_AS_STRING(bytev[ch]) = ch; }
      Py_INCREF(bytev[ch]); return (bytev[ch]);
    }
  }

  x = allocate(ty, n);
  if (p) memcpy(PyString_AS_STRING(x), p, n);
  return (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 const char *const 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@ */
"ByteString(STR): 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	*
d7ab1bab	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
4d09d07e MW	35	static PyObject empty, bytev[256];
4d09d07e MW	36
438b1639	37	static PyObject allocate(PyTypeObject ty, size_t n)
d7ab1bab	38	{
438b1639 MW	39	PyStringObject *x;
438b1639 MW	40	x = (PyStringObject *)ty->tp_alloc(ty, n);
d7ab1bab	41	x->ob_sval[n] = 0;
69e13768	42	#if defined(CACHE_HASH) \|\| PY_VERSION_HEX >= 0x02030000
d7ab1bab	43	x->ob_shash = -1;
d7ab1bab	44	#endif
3aa33042	45	x->ob_sstate = SSTATE_NOT_INTERNED;
d7ab1bab	46	return ((PyObject *)x);
	47	}
	48
438b1639 MW	49	static PyObject dowrap(PyTypeObject ty, const void *p, size_t n)
	50	{
	51	PyObject *x;
4d09d07e MW	52	int ch;
	53
	54	if (p && ty == bytestring_pytype) {
	55	if (!n) {
	56	if (!empty) empty = allocate(ty, 0);
	57	Py_INCREF(empty); return (empty);
	58	} else if (n == 1 && (ch = (unsigned char )p) < sizeof(bytev)) {
	59	if (!bytev[ch])
	60	{ bytev[ch] = allocate(ty, 1); *PyString_AS_STRING(bytev[ch]) = ch; }
	61	Py_INCREF(bytev[ch]); return (bytev[ch]);
	62	}
	63	}
438b1639 MW	64
	65	x = allocate(ty, n);
	66	if (p) memcpy(PyString_AS_STRING(x), p, n);
	67	return (x);
	68	}
	69
46e6ad89	70	PyObject bytestring_pywrap(const void p, size_t n)
	71	{ return (dowrap(bytestring_pytype, p, n)); }
	72
d7ab1bab	73	PyObject bytestring_pywrapbuf(buf b)
46e6ad89	74	{ return (dowrap(bytestring_pytype, BCUR(b), BLEFT(b))); }
	75
	76	static PyObject bytestring_pynew(PyTypeObject ty,
	77	PyObject arg, PyObject kw)
	78	{
	79	const char *p;
6b54260d	80	Py_ssize_t n;
827f89d7 MW	81	static const char *const kwlist[] = { "data", 0 };
827f89d7 MW	82	if (!PyArg_ParseTupleAndKeywords(arg, kw, "s#:new", KWLIST, &p, &n))
46e6ad89	83	return (0);
	84	return (dowrap(ty, p, n));
	85	}
d7ab1bab	86
2a21aec7	87	static PyObject meth_ctstreq(PyObject me, PyObject *arg)
bfb450cc MW	88	{
	89	char p, q;
	90	Py_ssize_t psz, qsz;
2a21aec7	91	if (!PyArg_ParseTuple(arg, "s#s#:ctstreq", &p, &psz, &q, &qsz))
bfb450cc MW	92	goto end;
	93	if (psz == qsz && ct_memeq(p, q, psz)) RETURN_TRUE;
	94	else RETURN_FALSE;
	95	end:
	96	return (0);
	97	}
	98
5a8b43b3 MW	99	static PyObject meth__ByteString_zero(PyObject me, PyObject *arg)
	100	{
	101	size_t sz;
	102	PyObject *rc = 0;
	103	if (!PyArg_ParseTuple(arg, "OO&:zero", &me, convszt, &sz)) goto end;
	104	rc = bytestring_pywrap(0, sz);
	105	memset(PyString_AS_STRING(rc), 0, sz);
	106	end:
	107	return (rc);
	108	}
	109
bfb450cc MW	110	static PyObject bytestring_pyrichcompare(PyObject me,
	111	PyObject *you, int op)
	112	{
	113	int b;
	114	void mystr, yourstr;
	115	Py_ssize_t mylen, yourlen, minlen;
	116
	117	if (!PyString_Check(me) \|\| !PyString_Check(you)) RETURN_NOTIMPL;
	118	mystr = PyString_AS_STRING(me); mylen = PyString_GET_SIZE(me);
	119	yourstr = PyString_AS_STRING(you); yourlen = PyString_GET_SIZE(you);
	120
	121	switch (op) {
	122	case Py_EQ:
	123	b = mylen == yourlen && ct_memeq(mystr, yourstr, mylen);
	124	break;
	125	case Py_NE:
	126	b = mylen != yourlen \|\| !ct_memeq(mystr, yourstr, mylen);
	127	break;
	128	default:
	129	minlen = mylen < yourlen ? mylen : yourlen;
	130	b = memcmp(mystr, yourstr, minlen);
	131	if (!b) b = mylen < yourlen ? -1 : mylen > yourlen ? +1 : 0;
	132	switch (op) {
	133	case Py_LT: b = b < 0; break;
	134	case Py_LE: b = b <= 0; break;
	135	case Py_GE: b = b >= 0; break;
	136	case Py_GT: b = b > 0; break;
	137	default: abort();
	138	}
	139	}
	140	if (b) RETURN_TRUE;
	141	else RETURN_FALSE;
	142	}
	143
d7ab1bab	144	#define BINOP(name, op) \
	145	static PyObject bytestring_py##name(PyObject x, PyObject *y) { \
	146	const void xv, yv; \
	147	const unsigned char xp, yp; \
	148	unsigned char *zp; \
87d705a8	149	Py_ssize_t xsz, ysz; \
d7ab1bab	150	int i; \
	151	PyObject *rc = 0; \
	152	if (PyObject_AsReadBuffer(x, &xv, &xsz) \|\| \
	153	PyObject_AsReadBuffer(y, &yv, &ysz)) \
	154	goto end; \
	155	if (xsz != ysz) VALERR("length mismatch"); \
	156	rc = bytestring_pywrap(0, xsz); \
	157	xp = xv; yp = yv; zp = (unsigned char *)PyString_AS_STRING(rc); \
	158	for (i = xsz; i > 0; i--) zp++ = xp++ op *yp++; \
	159	end: \
	160	return (rc); \
	161	}
	162	BINOP(and, &)
	163	BINOP(or, \|)
	164	BINOP(xor, ^)
	165
	166	#define UNOP(name, op) \
	167	static PyObject bytestring_py##name(PyObject x) { \
	168	const void *xv; \
	169	const unsigned char *xp; \
	170	unsigned char *zp; \
87d705a8	171	Py_ssize_t xsz; \
d7ab1bab	172	int i; \
	173	PyObject *rc = 0; \
	174	if (PyObject_AsReadBuffer(x, &xv, &xsz)) goto end; \
	175	rc = bytestring_pywrap(0, xsz); \
	176	xp = xv; zp = (unsigned char *)PyString_AS_STRING(rc); \
	177	for (i = xsz; i > 0; i--) zp++ = op xp++; \
	178	end: \
	179	return (rc); \
	180	}
	181	UNOP(not, ~)
	182
	183	static PyNumberMethods bytestring_pynumber = {
	184	0, /* @nb_add@ */
	185	0, /* @nb_subtract@ */
	186	0, /* @nb_multiply@ */
	187	0, /* @nb_divide@ */
	188	0, /* @nb_remainder@ */
	189	0, /* @nb_divmod@ */
	190	0, /* @nb_power@ */
	191	0, /* @nb_negative@ */
	192	0, /* @nb_positive@ */
	193	0, /* @nb_absolute@ */
	194	0, /* @nb_nonzero@ */
	195	bytestring_pynot, /* @nb_invert@ */
	196	0, /* @nb_lshift@ */
	197	0, /* @nb_rshift@ */
	198	bytestring_pyand, /* @nb_and@ */
	199	bytestring_pyxor, /* @nb_xor@ */
	200	bytestring_pyor, /* @nb_or@ */
	201	0, /* @nb_coerce@ */
	202	0, /* @nb_int@ */
	203	0, /* @nb_long@ */
	204	0, /* @nb_float@ */
	205	0, /* @nb_oct@ */
	206	0, /* @nb_hex@ */
	207	};
	208
	209	static PyBufferProcs bytestring_pybuffer;
	210
	211	static PyTypeObject bytestring_pytype_skel = {
6d4db0bf	212	PyObject_HEAD_INIT(0) 0, /* Header */
c461c9b3	213	"ByteString", /* @tp_name@ */
d7ab1bab	214	0, /* @tp_basicsize@ */
	215	0, /* @tp_itemsize@ */
	216
	217	0, /* @tp_dealloc@ */
	218	0, /* @tp_print@ */
	219	0, /* @tp_getattr@ */
	220	0, /* @tp_setattr@ */
	221	0, /* @tp_compare@ */
	222	0, /* @tp_repr@ */
	223	&bytestring_pynumber, /* @tp_as_number@ */
	224	0, /* @tp_as_sequence@ */
	225	0, /* @tp_as_mapping@ */
	226	0, /* @tp_hash@ */
	227	0, /* @tp_call@ */
	228	0, /* @tp_str@ */
	229	0, /* @tp_getattro@ */
	230	0, /* @tp_setattro@ */
	231	&bytestring_pybuffer, /* @tp_as_buffer@ */
	232	Py_TPFLAGS_DEFAULT \| /* @tp_flags@ */
	233	Py_TPFLAGS_CHECKTYPES \|
	234	Py_TPFLAGS_BASETYPE,
	235
	236	/* @tp_doc@ */
06cd26e8	237	"ByteString(STR): byte string class.",
d7ab1bab	238
	239	0, /* @tp_traverse@ */
	240	0, /* @tp_clear@ */
bfb450cc	241	bytestring_pyrichcompare, /* @tp_richcompare@ */
d7ab1bab	242	0, /* @tp_weaklistoffset@ */
d7ab1bab	243	0, /* @tp_iter@ */
963a6148	244	0, /* @tp_iternext@ */
d7ab1bab	245	0, /* @tp_methods@ */
	246	0, /* @tp_members@ */
	247	0, /* @tp_getset@ */
	248	0, /* @tp_base@ */
	249	0, /* @tp_dict@ */
	250	0, /* @tp_descr_get@ */
	251	0, /* @tp_descr_set@ */
	252	0, /* @tp_dictoffset@ */
	253	0, /* @tp_init@ */
	254	PyType_GenericAlloc, /* @tp_alloc@ */
46e6ad89	255	bytestring_pynew, /* @tp_new@ */
3aa33042	256	0, /* @tp_free@ */
d7ab1bab	257	0 /* @tp_is_gc@ */
	258	};
	259
	260	/----- Initialization ----------------------------------------------------/
	261
bfb450cc MW	262	static PyMethodDef methods[] = {
	263	#define METHNAME(func) meth_##func
	264	METH (ctstreq, "ctstreq(S, T) -> BOOL")
5a8b43b3	265	METH (_ByteString_zero, "zero(N) -> 0000...00")
bfb450cc MW	266	#undef METHNAME
	267	{ 0 }
	268	};
	269
d7ab1bab	270	#define string_pytype &PyString_Type
	271	void bytestring_pyinit(void)
	272	{
	273	INITTYPE(bytestring, string);
bfb450cc	274	addmethods(methods);
d7ab1bab	275	}
	276
	277	void bytestring_pyinsert(PyObject *mod)
	278	{
	279	INSERT("ByteString", bytestring_pytype);
	280	}
	281
	282	/----- That's all, folks -------------------------------------------------/