#include "python.h"

/**
*
* @section Python Built-Ins
*
* The Python engine includes a large number of Python built-ins. Some
* of them are interfaced here.
*/

//@{

static PyObject *find_obj(PyObject *ob, term_t lhs) {
  char *s;
  PyObject *out, *pName;
  int arity = 0;

  if (!PL_get_atom_chars(lhs, &s)) {
    atom_t name;
    if (!PL_get_name_arity(lhs, &name, &arity))
      return NULL;
    s = PL_atom_chars(name);
  }
  if (ob) {
    out = PyObject_GetAttrString(ob, s);
    return out;
  }
  if (!ob && !arity) {
#if PY_MAJOR_VERSION < 3
    pName = PyString_FromString(s);
#else
    pName = PyUnicode_FromString(s);
#endif
    if (pName == NULL) {
      return NULL;
    }
    if ((out = PyImport_Import(pName))) {
      Py_IncRef(out);
      //      Py_DecRef(pName); ??
      return out;
    }
  }
  if (!ob && py_Main && (out = PyObject_GetAttrString(py_Main, s)))
    return out;
  return NULL;
}

/**
* Python abs
*
* @param t Prolog term with a number
*
* @return a Python object with the number's absolute value
*/

static PyObject *bip_abs(term_t t) {
  PyObject *pVal, *nVal;

  if (!PL_get_arg(1, t, t))
    return NULL;
  pVal = term_to_python(t, true);
  nVal = PyNumber_Absolute(pVal);
  Py_DecRef(pVal);
  return nVal;
}

/**
* Python all
*
* @param t Prolog term with a previously constructed Python iterator
*
* @return the Python boolean `True` if all elements of the iterator are `True`,
*    `False`  otherwise.
*/
static PyObject *bip_all(term_t t) {
  PyObject *it, *item, *v;
  PyObject *(*iternext)(PyObject *);
  int cmp;

  if (!PL_get_arg(1, t, t))
    return NULL;
  v = term_to_python(t, true);
  it = PyObject_GetIter(v);
  if (it == NULL)
    return NULL;
  iternext = *Py_TYPE(it)->tp_iternext;

  //  PyObject_Print(v, stderr, 0);
  for (;;) {
    item = iternext(it);
    if (item == NULL)
      break;
    cmp = PyObject_IsTrue(item);
    Py_DECREF(item);
    if (cmp < 0) {
      Py_DECREF(it);
      return NULL;
    }
    if (cmp == 0) {
      Py_DECREF(it);
      return Py_False;
    }
  }
  Py_DECREF(it);
  if (PyErr_Occurred()) {
    if (PyErr_ExceptionMatches(PyExc_StopIteration))
      PyErr_Clear();
    else
      return NULL;
  }
  return Py_True;
}

/**
* Python any
*
* @param t Prolog term with a previously constructed Python iterator
*
* @return the Python boolean `True` if any element of the iterator is `True`,
*    `False`  if all of them are false.
*/
static PyObject *bip_any(term_t t) {
  PyObject *it, *item, *v;
  PyObject *(*iternext)(PyObject *);
  int cmp;

  if (!PL_get_arg(1, t, t))
    return NULL;
  v = term_to_python(t, true);
  it = PyObject_GetIter(v);
  if (it == NULL)
    return NULL;
  iternext = *Py_TYPE(it)->tp_iternext;

  for (;;) {
    item = iternext(it);
    if (item == NULL)
      break;
    cmp = PyObject_IsTrue(item);
    Py_DECREF(item);
    if (cmp < 0) {
      Py_DECREF(it);
      return NULL;
    }
    if (cmp == 1) {
      Py_DECREF(it);
      Py_RETURN_TRUE;
    }
  }
  Py_DECREF(it);
  if (PyErr_Occurred()) {
    if (PyErr_ExceptionMatches(PyExc_StopIteration))
      PyErr_Clear();
    else
      return NULL;
  }
  Py_RETURN_FALSE;
}

static PyObject *bip_bin(term_t t) {
  PyObject *v;

  if (!PL_get_arg(1, t, t))
    return NULL;
  v = term_to_python(t, true);
  return PyNumber_ToBase(v, 2);
}

static PyObject *bip_float(term_t t, bool eval) {
  PyObject *pVal, *o;

  if (!PL_get_arg(1, t, t))
    return NULL;
  pVal = term_to_python(t, eval);
  if (PyLong_Check(pVal)) {
    o = PyFloat_FromDouble(PyLong_AsLong(pVal));
#if PY_MAJOR_VERSION < 3
  } else if (PyInt_Check(pVal)) {
    o = PyFloat_FromDouble(PyInt_AsLong(pVal));
#endif
  } else if (PyFloat_Check(pVal)) {
    return pVal;
  } else
    return NULL;
  Py_DECREF(pVal);
  return o;
}

static PyObject *bip_int(term_t t) {
  PyObject *pVal, *o;

  if (!PL_get_arg(1, t, t))
    return NULL;
  pVal = term_to_python(t, true);
#if PY_MAJOR_VERSION < 3
  if (PyLong_Check(pVal)) {
    o = PyInt_FromLong(PyLong_AsLong(pVal));
  } else if (PyInt_Check(pVal)) {
    return pVal;
#else
  if (PyLong_Check(pVal)) {
    return pVal;
#endif
  } else if (PyFloat_Check(pVal)) {
#if PY_MAJOR_VERSION < 3
    o = PyInt_FromLong(PyFloat_AsDouble(pVal));
#else
    o = PyLong_FromDouble(PyFloat_AsDouble(pVal));
#endif
  } else
    return NULL;
  Py_DECREF(pVal);
  return o;
}

static PyObject *bip_long(term_t t) {
  PyObject *pVal, *o;

  if (!PL_get_arg(1, t, t))
    return NULL;
  pVal = term_to_python(t, true);
  if (PyLong_Check(pVal)) {
    return pVal;
#if PY_MAJOR_VERSION < 3
  } else if (PyInt_Check(pVal)) {
    o = PyLong_FromLong(PyInt_AsLong(pVal));
#endif
  } else if (PyFloat_Check(pVal)) {
    o = pVal;
  } else
    return NULL;
  Py_DECREF(pVal);
  return o;
}

static PyObject *bip_iter(term_t t) {
  PyObject *v;

  if (!PL_get_arg(1, t, t))
    return NULL;
  v = term_to_python(t, true);
  return PyObject_GetIter(v);
}

static PyObject *bip_ord(term_t t) {
  PyObject *pVal;
  Py_ssize_t size;

  if (!PL_get_arg(1, t, t))
    return NULL;
  pVal = term_to_python(t, true);
  if (PyUnicode_Check(pVal)) {
#if PY_MAJOR_VERSION < 3
    size = PyUnicode_GET_SIZE(pVal);
#else
    size = PyUnicode_GetLength(pVal);
#endif
    if (size == 1) {
#if PY_MAJOR_VERSION < 3
      long ord = (long)*PyUnicode_AS_UNICODE(pVal);
      return PyInt_FromLong(ord);
#else
      Py_UCS4 ord = PyUnicode_ReadChar(pVal, 0);
      return PyLong_FromLong(ord);
#endif
    }
    return NULL;
  } else if (PyByteArray_Check(pVal)) {
    char *s = PyByteArray_AsString(pVal);

    if (s[1])
      return NULL;
#if PY_MAJOR_VERSION < 3
    return PyInt_FromLong(s[0]);
  } else if (PyString_Check(pVal)) {
    char *s = PyString_AsString(pVal);

    if (s[1])
      return NULL;
    return PyInt_FromLong(s[0]);
#else
    return PyLong_FromLong(s[0]);
#endif
  } else
    return NULL;
}

static PyObject *bip_sum(term_t t) {
  PyObject *seq;
  PyObject *result = NULL;
  PyObject *temp, *item, *iter;

  if (!PL_get_arg(1, t, t))
    return NULL;
  seq = term_to_python(t, true);
  iter = PyObject_GetIter(seq);
  if (iter == NULL)
    return NULL;

  if (result == NULL) {
#if PY_MAJOR_VERSION < 3
    result = PyInt_FromLong(0);
#else
    result = PyLong_FromLong(0);
#endif
    if (result == NULL) {
      Py_DECREF(iter);
      return NULL;
    }
  } else {
#if PY_MAJOR_VERSION < 3
    /* reject string values for 'start' parameter */
    if (PyObject_TypeCheck(result, &PyBaseString_Type)) {
      PyErr_SetString(PyExc_TypeError,
                      "sum() can't sum strings [use ''.join(seq) instead]");
      Py_DECREF(iter);
      return NULL;
    }
    Py_INCREF(result);
#endif
  }

#ifndef SLOW_SUM
/* Fast addition by keeping temporary sums in C instead of new Python objects.
Assumes all inputs are the same type.  If the assumption fails, default
to the more general routine.
*/
#if PY_MAJOR_VERSION < 3
  if (PyInt_CheckExact(result)) {
    long i_result = PyInt_AS_LONG(result);
#else
  if (PyLong_CheckExact(result)) {
    long i_result = PyLong_AS_LONG(result);
#endif
    Py_DECREF(result);
    result = NULL;
    while (result == NULL) {
      item = PyIter_Next(iter);
      if (item == NULL) {
        Py_DECREF(iter);
        if (PyErr_Occurred())
          return NULL;
#if PY_MAJOR_VERSION < 3
        return PyInt_FromLong(i_result);
#else
        return PyLong_FromLong(i_result);
#endif
      }
#if PY_MAJOR_VERSION < 3
      if (PyInt_CheckExact(item)) {
        long b = PyInt_AS_LONG(item);
#else
      if (PyLong_CheckExact(item)) {
        long b = PyLong_AS_LONG(item);
#endif
        long x = i_result + b;
        if ((x ^ i_result) >= 0 || (x ^ b) >= 0) {
          i_result = x;
          Py_DECREF(item);
          continue;
        }
      }
/* Either overflowed or is not an int. Restore real objects and process normally
 */
#if PY_MAJOR_VERSION < 3
      result = PyInt_FromLong(i_result);
#else
      result = PyLong_FromLong(i_result);
#endif
      temp = PyNumber_Add(result, item);
      Py_DECREF(result);
      Py_DECREF(item);
      result = temp;
      if (result == NULL) {
        Py_DECREF(iter);
        return NULL;
      }
    }
  }

  if (PyFloat_CheckExact(result)) {
    double f_result = PyFloat_AS_DOUBLE(result);
    Py_DECREF(result);
    result = NULL;
    while (result == NULL) {
      item = PyIter_Next(iter);
      if (item == NULL) {
        Py_DECREF(iter);
        if (PyErr_Occurred())
          return NULL;
        return PyFloat_FromDouble(f_result);
      }
      if (PyFloat_CheckExact(item)) {
        PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
            f_result += PyFloat_AS_DOUBLE(item);
        PyFPE_END_PROTECT(f_result) Py_DECREF(item);
        continue;
      }
#if PY_MAJOR_VERSION < 3
      if (PyInt_CheckExact(item)) {
        PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
            f_result += (double)PyInt_AS_LONG(item);
        PyFPE_END_PROTECT(f_result) Py_DECREF(item);
        continue;
      }
#else
      if (PyLong_CheckExact(item)) {
        PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
            f_result += PyLong_AsDouble(item);
        PyFPE_END_PROTECT(f_result) Py_DECREF(item);
        continue;
      }
#endif
      result = PyFloat_FromDouble(f_result);
      temp = PyNumber_Add(result, item);
      Py_DECREF(result);
      Py_DECREF(item);
      result = temp;
      if (result == NULL) {
        Py_DECREF(iter);
        return NULL;
      }
    }
#endif
  }

  for (;;) {
    item = PyIter_Next(iter);
    if (item == NULL) {
      /* error, or end-of-sequence */
      if (PyErr_Occurred()) {
        Py_DECREF(result);
        result = NULL;
      }
      break;
    }
    /* It's tempting to use PyNumber_InPlaceAdd instead of
    PyNumber_Add here, to avoid quadratic running time
    when doing 'sum(list_of_lists, [])'.  However, this
    would produce a change in behaviour: a snippet like

    empty = []
    sum([[x] for x in range(10)], empty)

    would change the value of empty. */
    temp = PyNumber_Add(result, item);
    Py_DECREF(result);
    Py_DECREF(item);
    result = temp;
    if (result == NULL)
      break;
  }
  Py_DECREF(iter);
  return result;
}

//@}

static long get_int(term_t arg, bool eval) {
  long low;

  if (!PL_get_long(arg, &low)) {
    PyObject *low = term_to_python(arg, eval);
    if (PyLong_Check(low)) {
      return PyLong_AsLong(low);
#if PY_MAJOR_VERSION < 3
    } else if (PyInt_Check(low)) {
      return PyInt_AsLong(low);
#endif
    } else {
      return 0;
    }
  }
  return low;
}

/* Return number of items in range/xrange (lo, hi, step).  step > 0
* required.  Return a value < 0 if & only if the true value is too
* large to fit in a signed long.
*/
static long get_len_of_range(long lo, long hi, long step) {
  /* -------------------------------------------------------------
  If lo >= hi, the range is empty.
  Else if n values are in the range, the last one is
  lo + (n-1)*step, which must be <= hi-1.  Rearranging,
  n <= (hi - lo - 1)/step + 1, so taking the floor of the RHS gives
  the proper value.  Since lo < hi in this case, hi-lo-1 >= 0, so
  the RHS is non-negative and so truncation is the same as the
  floor.  Letting M be the largest positive long, the worst case
  for the RHS numerator is hi=M, lo=-M-1, and then
  hi-lo-1 = M-(-M-1)-1 = 2*M.  Therefore unsigned long has enough
  precision to compute the RHS exactly.
  ---------------------------------------------------------------*/
  long n = 0;
  if (lo < hi) {
    unsigned long uhi = (unsigned long)hi;
    unsigned long ulo = (unsigned long)lo;
    unsigned long diff = uhi - ulo - 1;
    n = (long)(diff / (unsigned long)step + 1);
  }
  return n;
}

static PyStructSequence_Field pnull[] = {
        {"A1", NULL},  {"A2", NULL},  {"A3", NULL},  {"A4", NULL},
        {"A5", NULL},  {"A6", NULL},  {"A7", NULL},  {"A8", NULL},
        {"A9", NULL},  {"A9", NULL},  {"A10", NULL}, {"A11", NULL},
        {"A12", NULL}, {"A13", NULL}, {"A14", NULL}, {"A15", NULL},
        {"A16", NULL}, {"A17", NULL}, {"A18", NULL}, {"A19", NULL},
        {"A19", NULL}, {"A20", NULL}, {"A21", NULL}, {"A22", NULL},
        {"A23", NULL}, {"A24", NULL}, {"A25", NULL}, {"A26", NULL},
        {"A27", NULL}, {"A28", NULL}, {"A29", NULL}, {"A29", NULL},
        {"A30", NULL}, {"A31", NULL}, {"A32", NULL}, {0}};

static PyObject *
structseq_str(PyObject *iobj)
{

    /* buffer and type size were chosen well considered. */
#define REPR_BUFFER_SIZE 512
#define TYPE_MAXSIZE 100

    PyStructSequence *obj = (PyStructSequence *)iobj;
    PyTypeObject *typ = Py_TYPE(obj);
    bool removelast = false;
    Py_ssize_t len, i;
    char buf[REPR_BUFFER_SIZE];
    char *endofbuf, *pbuf = buf;
    /* pointer to end of writeable buffer; safes space for "...)\0" */
    endofbuf= &buf[REPR_BUFFER_SIZE-5];

    /* "typename(", limited to  TYPE_MAXSIZE */
    len = strlen(typ->tp_name) > TYPE_MAXSIZE ? TYPE_MAXSIZE :
          strlen(typ->tp_name);
    strncpy(pbuf, typ->tp_name, len);
    pbuf += len;
    *pbuf++ = '(';

    for (i=0; i < ((PyStructSequence *)obj)->ob_base.ob_size; i++) {
        PyObject *val, *repr;
        char *crepr;

        val = PyStructSequence_GET_ITEM(obj, i);
        repr = PyObject_Str(val);
        if (repr == NULL)
            return NULL;
        crepr = PyUnicode_AsUTF8(repr);
        if (crepr == NULL) {
            Py_DECREF(repr);
            return NULL;
        }

        /* + 3: keep space for ", " */
        len = strlen(crepr) + 2;
        if ((pbuf+len) <= endofbuf) {
            strcpy(pbuf, crepr);
            pbuf += strlen(crepr);
            *pbuf++ = ',';
            *pbuf++ = ' ';
            removelast = 1;
            Py_DECREF(repr);
        }
        else {
            strcpy(pbuf, "...");
            pbuf += 3;
            removelast = 0;
            Py_DECREF(repr);
            break;
        }
    }
    if (removelast) {
        /* overwrite last ", " */
        pbuf-=2;
    }
    *pbuf++ = ')';
    *pbuf = '\0';

    return PyUnicode_FromString(buf);
}


static PyObject *
structseq_repr(PyObject *iobj)
{

    /* buffer and type size were chosen well considered. */
#define REPR_BUFFER_SIZE 512
#define TYPE_MAXSIZE 100

    PyStructSequence *obj = (PyStructSequence *)iobj;
    PyTypeObject *typ = Py_TYPE(obj);
    bool removelast = false;
    Py_ssize_t len, i;
    char buf[REPR_BUFFER_SIZE];
    char *endofbuf, *pbuf = buf;
    /* pointer to end of writeable buffer; safes space for "...)\0" */
    endofbuf= &buf[REPR_BUFFER_SIZE-5];

    /* "typename(", limited to  TYPE_MAXSIZE */
    len = strlen(typ->tp_name) > TYPE_MAXSIZE ? TYPE_MAXSIZE :
          strlen(typ->tp_name);
    strncpy(pbuf, typ->tp_name, len);
    pbuf += len;
    *pbuf++ = '(';

    for (i=0; i < ((PyStructSequence *)obj)->ob_base.ob_size; i++) {
        PyObject *val, *repr;
        char *crepr;

        val = PyStructSequence_GET_ITEM(obj, i);
        repr = PyObject_Repr(val);
        if (repr == NULL)
            return NULL;
        crepr = PyUnicode_AsUTF8(repr);
        if (crepr == NULL) {
            Py_DECREF(repr);
            return NULL;
        }

        /* + 3: keep space for ", " */
        len = strlen(crepr) + 2;
        if ((pbuf+len) <= endofbuf) {
            strcpy(pbuf, crepr);
            pbuf += strlen(crepr);
            *pbuf++ = ',';
            *pbuf++ = ' ';
            removelast = 1;
            Py_DECREF(repr);
        }
        else {
            strcpy(pbuf, "...");
            pbuf += 3;
            removelast = 0;
            Py_DECREF(repr);
            break;
        }
    }
    if (removelast) {
        /* overwrite last ", " */
        pbuf-=2;
    }
    *pbuf++ = ')';
    *pbuf = '\0';

    return PyUnicode_FromString(buf);
}

static PyObject *
term_to_nametuple( const char *s, int arity, term_t t) {
  PyTypeObject *typp;
    PyObject *o;
PyObject *key = PyUnicode_FromString(s);
if (PyDict_Contains(py_F2P, key)) {
  typp = (PyTypeObject*)PyDict_GetItem(py_F2P, key);
} else {

  typp = PyMem_Malloc(sizeof(PyTypeObject));
  PyStructSequence_Desc *desc = PyMem_Malloc(sizeof(PyStructSequence_Desc));

  desc->name = PyUnicode_AsUTF8(key);
  desc->doc = "YAPTerm";
  desc->fields = pnull;
  desc->n_in_sequence = 32;
  if (PyStructSequence_InitType2(typp, desc) < 0)
      return NULL;
    typp->tp_str = structseq_str;
    typp->tp_repr = structseq_repr;
  //     typp = PyStructSequence_NewType(desc);
  Py_INCREF(typp);
  //	typp->tp_flags |= Py_TPFLAGS_HEAPTYPE;
  PyModule_AddObject(py_Yapex, s, (PyObject *)typp);
  PyDict_SetItem(py_F2P, key, (PyObject *)typp);
}
o = PyStructSequence_New(typp);
term_t tleft = PL_new_term_ref();
    for (int i = 0; i < arity; i++) {
  PyObject *pArg;
  if (!PL_get_arg(i + 1, t, tleft))
    return NULL;
  pArg = term_to_python(tleft, false);
  if (pArg == NULL)
    return NULL;
  /* pArg reference stolen here: */
  PyStructSequence_SET_ITEM(o, i, pArg);
  }
    ((PyStructSequence *)o)->ob_base.ob_size = arity;

    return o;
}

static PyObject *bip_range(term_t t) {
  long ilow = 0, ihigh = 0, istep = 1;
  long bign;
  Py_ssize_t i, n;
  int arity;
  atom_t name;
  term_t arg = PL_new_term_ref();

  PyObject *v;

  if (!PL_get_name_arity(t, &name, &arity))
    return NULL;
  if (!PL_get_arg(1, t, arg))
    return NULL;
  ilow = get_int(arg, true);
  if (arity == 1) {
    ihigh = ilow;
    ilow = 0;
  } else {
    if (!PL_get_arg(2, t, arg))
      return NULL;
    ihigh = get_int(arg, true);
    if (arity == 3) {
      if (!PL_get_arg(3, t, arg))
        return NULL;
      istep = get_int(arg, true);
    }
  }
  if (istep == 0) {
    PyErr_SetString(PyExc_ValueError, "range() step argument must not be zero");
    return NULL;
  }
  if (istep > 0)
    bign = get_len_of_range(ilow, ihigh, istep);
  else
    bign = get_len_of_range(ihigh, ilow, -istep);
  n = (Py_ssize_t)bign;
  if (bign < 0 || (long)n != bign) {
    PyErr_SetString(PyExc_OverflowError, "range() result has too many items");
    return NULL;
  }
  v = PyList_New(n);
  if (v == NULL)
    return NULL;
  for (i = 0; i < n; i++) {
#if PY_MAJOR_VERSION < 3
    PyObject *w = PyInt_FromLong(ilow);
#else
    PyObject *w = PyLong_FromLong(ilow);
#endif
    if (w == NULL) {
      Py_DECREF(v);
      return NULL;
    }
    PyList_SET_ITEM(v, i, w);
    ilow += istep;
  }
  return v;
}
static int copy_to_dictionary(PyObject *dict, term_t targ, term_t taux,
                              bool eval) {
  PyObject *lhs, *rhs;
  term_t tleft = PL_new_term_ref(), tright = PL_new_term_ref();

  while (true) {
    functor_t fun;

    if (!PL_get_functor(targ, &fun))
      return false;
    if (fun == FUNCTOR_comma2) {
      if (!PL_get_arg(1, targ, taux)) {
        return false;
      }
      if (!PL_get_arg(1, taux, tleft)) {
        return FALSE;
      }
      lhs = term_to_python(tleft, eval);
      if (!PL_get_arg(2, taux, tright)) {
        return FALSE;
      }
      rhs = term_to_python(tright, eval);
      if (PyDict_SetItem(dict, lhs, rhs) < 0) {
        return FALSE;
      }
      // PyObject_Print(dict, stderr, 0); fprintf(stderr,"\n");
      // Py_DECREF(lhs);
      // Py_DECREF(rhs);

      if (!PL_get_arg(1, targ, targ)) {
        return FALSE;
      }
    } else {
      if (!PL_get_arg(1, targ, tleft)) {
        return FALSE;
      }
      lhs = atom_to_python_string(tleft);
      if (lhs == NULL) {
        return FALSE;
      }
      if (!PL_get_arg(2, targ, tright)) {
        return FALSE;
      }
      rhs = term_to_python(tright, eval);
      if (rhs == NULL) {
        PyErr_Print();
        return FALSE;
      }
      if (PyDict_SetItem(dict, lhs, rhs) < 0) {
        return FALSE;
      }
      // PyObject_Print(dict, stderr, 0); fprintf(stderr,"\n");
      // Py_DECREF(lhs);
      // Py_DECREF(rhs);
      break;
    }
  }
  return TRUE;
}

PyObject *compound_to_pytree(term_t t, functor_t fun) {
    PyObject *o;
    o = py_Main;
  atom_t name = PL_functor_name(fun);
  int arity = PL_functor_arity(fun);

  if (fun == FUNCTOR_dollar1) {
    char *s;
    term_t targ = PL_new_term_ref();
    if (!PL_get_arg(1, t, targ))
      return NULL;
    if (!PL_get_atom_chars(targ, &s))
      return NULL;
    /* return __main__,s */
    return PyObject_GetAttrString(py_Main, s);
  } else if (fun == FUNCTOR_pointer1) {
    void *ptr;
    term_t targ = PL_new_term_ref();

    if (!PL_get_arg(1, t, targ))
      return NULL;
    if (!PL_get_pointer(targ, &ptr))
      return NULL;
    /* return __main__.s */
    return (PyObject *)ptr;
  } else if (fun == FUNCTOR_brackets1) {
    if (!PL_get_arg(1, t, t))
      return NULL;
    return term_to_python(t, false);
  } else if (fun == FUNCTOR_complex2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;
    double d1 =0.0, d2=0.0;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, false);
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, false);
      if (lhs == NULL || rhs == NULL)
          return NULL;
    if (PyFloat_Check(lhs)) {
      d1 = PyFloat_AsDouble(lhs);
    } else if (PyLong_Check(lhs)) {
      d1 = PyLong_AsDouble(lhs);
#if PY_MAJOR_VERSION < 3
    } else if (PyInt_Check(lhs)) {
      d1 = PyInt_AsLong(lhs);
#endif
    } else {
      lhs = NULL;
    }
    if (PyFloat_Check(rhs)) {
      d2 = PyFloat_AsDouble(rhs);
    } else if (PyLong_Check(rhs)) {
      d2 = PyLong_AsDouble(rhs);
#if PY_MAJOR_VERSION < 3
    } else if (PyInt_Check(rhs)) {
      d2 = PyInt_AsLong(rhs);
#endif
    } else {
      lhs = NULL;
    }
    if (lhs && rhs)
      return PyComplex_FromDoubles(d1, d2);
  } else if (fun == FUNCTOR_curly1) {
    term_t targ = PL_new_term_ref(), taux = PL_new_term_ref();
    PyObject *dict;

    if (!PL_get_arg(1, t, t))
      return NULL;
    if (!(dict = PyDict_New()))
      return NULL;
    while (PL_is_functor(t, FUNCTOR_comma2)) {
      if (!PL_get_arg(1, t, targ))
        return NULL;
      if (PL_is_functor(targ, FUNCTOR_colon2)) {
        if (!copy_to_dictionary(dict, targ, taux, false))
          return NULL;
        if (!PL_get_arg(2, t, t))
          return NULL;
      } else {
        return NULL;
      }
    }
    if (PL_is_functor(t, FUNCTOR_colon2)) {
      if (!copy_to_dictionary(dict, t, taux, false))
        return NULL;
    } else {
      return NULL;
    }
    return dict;
  } else if (fun == FUNCTOR_sqbrackets2) {
    //
    term_t targ = PL_new_term_ref(), trhs = PL_new_term_ref();
    PyObject *v;
    Py_ssize_t min, max;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    v = term_to_python(targ, true);
    if (!PL_get_arg(2, t, targ) || !PL_get_list(targ, trhs, targ))
      return NULL;
    if (PL_is_functor(targ, FUNCTOR_colon2)) {
      if (!PL_get_arg(1, trhs, targ))
        return NULL;
      min = get_p_int(term_to_python(targ, true), 0);
      if (!PL_get_arg(2, trhs, targ))
        return NULL;
      if (PL_is_functor(targ, FUNCTOR_colon2)) {
        return NULL;
      }
      max = get_p_int(term_to_python(targ, true), PyObject_Size(v));
      if (!PySequence_Check(v))
        return NULL;
      return PySequence_GetSlice(v, min, max);
    }
  } else if (fun == FUNCTOR_dot2) {
    term_t tleft = PL_new_term_ref();
    PyObject *o = py_Main;
    while (fun == FUNCTOR_dot2) {
      if (!PL_get_arg(1, t, tleft))
        return FALSE;
      o = find_obj(o, tleft);
      if (!o)
        return FALSE;
      if (!PL_get_arg(2, t, t))
        return FALSE;
      if (!PL_get_functor(t, &fun))
        break;
    }
  }
  if (!arity) {
    char *s;

    if (!PL_get_atom_chars(t, &s) )
      return NULL;
      // this should never happen
      return term_to_python( t, false);
  } else {
      const char *s;
      if (!(s = PL_atom_chars(name)))
          return NULL;
      return term_to_nametuple(s, arity, t);
  }
#if 0
        PyObject *c, *o1;
    o = PyTuple_New(arity);
    tleft = PL_new_term_ref();
    for (i = 0; i < arity; i++) {
      PyObject *pArg;
      if (!PL_get_arg(i + 1, t, tleft))
        return NULL;
      pArg = term_to_python(tleft, false);
      if (pArg == NULL)
        return NULL;
      /* pArg reference stolen here: */
      PyTuple_SET_ITEM(o, i, pArg);
    }
    if (PyObject_HasAttrString(py_Yapex, "T"))
      c = PyObject_GetAttrString(py_Yapex, "T");
    o1 = PyTuple_New(2);
    PyTuple_SET_ITEM(o1, 0, PyUnicode_FromString(s));
    PyTuple_SET_ITEM(o1, 1, o);
    return o1;
#endif
}

PyObject *compound_to_pyeval(term_t t, functor_t fun) {
  if (fun == FUNCTOR_dollar1) {
    char *s;
    term_t targ = PL_new_term_ref();
    if (!PL_get_arg(1, t, targ))
      return NULL;
    if (!PL_get_atom_chars(targ, &s))
      return NULL;
    /* return __main__,s */
    return PyObject_GetAttrString(py_Main, s);
  } else if (fun == FUNCTOR_pointer1) {
    void *ptr;
    term_t targ = PL_new_term_ref();

    if (!PL_get_arg(1, t, targ))
      return NULL;
    if (!PL_get_pointer(targ, &ptr))
      return NULL;
    /* return __main__,s */
    return (PyObject *)ptr;
  } else if (fun == FUNCTOR_brackets1) {
    if (!PL_get_arg(1, t, t))
      return NULL;
    return term_to_python(t, true);
  } else if (fun == FUNCTOR_abs1) {
    return bip_abs(t);
  } else if (fun == FUNCTOR_all1) {
    return bip_all(t);
  } else if (fun == FUNCTOR_any1) {
    return bip_any(t);
  } else if (fun == FUNCTOR_bin1) {
    return bip_bin(t);
  } else if (fun == FUNCTOR_ord1) {
    return bip_ord(t);
  } else if (fun == FUNCTOR_int1) {
    return bip_int(t);
  } else if (fun == FUNCTOR_long1) {
    return bip_long(t);
  } else if (fun == FUNCTOR_float1) {
    return bip_float(t, true);
  } else if (fun == FUNCTOR_iter1) {
    return bip_iter(t);
  } else if (fun == FUNCTOR_range1 || fun == FUNCTOR_range2 ||
             fun == FUNCTOR_range3) {
    return bip_range(t);
  } else if (fun == FUNCTOR_sum1) {
    return bip_sum(t);
  } else if (fun == FUNCTOR_len1) {
    term_t targ = PL_new_term_ref();
    PyObject *ptr;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    ptr = term_to_python(targ, true);
    return PyLong_FromLong(PyObject_Length(ptr));
  } else if (fun == FUNCTOR_dir1) {
    term_t targ = PL_new_term_ref();
    PyObject *ptr;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    ptr = term_to_python(targ, true);
    return PyObject_Dir(ptr);
  } else if (fun == FUNCTOR_complex2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;
    double d1, d2;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, true);
    if (!PyNumber_Check(lhs))
      return NULL;
    if (PyFloat_Check(lhs)) {
      d1 = PyFloat_AsDouble(lhs);
    } else if (PyLong_Check(lhs)) {
      d1 = PyLong_AsLong(lhs);
#if PY_MAJOR_VERSION < 3
    } else if (PyInt_Check(lhs)) {
      d1 = PyInt_AsLong(lhs);
#endif
    } else {
      return NULL;
    }
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, true);
    if (!PyNumber_Check(rhs))
      return NULL;
    if (PyFloat_Check(rhs)) {
      d2 = PyFloat_AsDouble(rhs);
    } else if (PyLong_Check(rhs)) {
      d2 = PyLong_AsLong(rhs);
#if PY_MAJOR_VERSION < 3
    } else if (PyInt_Check(rhs)) {
      d2 = PyInt_AsLong(rhs);
#endif
    } else {
      return NULL;
    }

    return PyComplex_FromDoubles(d1, d2);
  } else if (fun == FUNCTOR_curly1) {
    term_t targ = PL_new_term_ref(), taux = PL_new_term_ref();
    PyObject *dict;

    if (!PL_get_arg(1, t, t))
      return NULL;
    if (!(dict = PyDict_New()))
      return NULL;
    while (PL_is_functor(t, FUNCTOR_comma2)) {
      if (!PL_get_arg(1, t, targ))
        return NULL;
      if (PL_is_functor(targ, FUNCTOR_colon2)) {
        if (!copy_to_dictionary(dict, targ, taux, true))
          return NULL;
        if (!PL_get_arg(2, t, t))
          return NULL;
      } else {
        return NULL;
      }
    }
    if (PL_is_functor(t, FUNCTOR_colon2)) {
      if (!copy_to_dictionary(dict, t, taux, true))
        return NULL;
    } else {
      return NULL;
    }
    return dict;
  } else if (fun == FUNCTOR_plus2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, true);
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, true);
    if (PySequence_Check(lhs) && PySequence_Check(rhs)) {
      return PySequence_Concat(lhs, rhs);
    }
    if (!PyNumber_Check(lhs))
      return NULL;
    if (!PyNumber_Check(rhs))
      return NULL;
    return PyNumber_Add(lhs, rhs);
  } else if (fun == FUNCTOR_sub2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, true);
    if (!PyNumber_Check(lhs))
      return NULL;
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, true);
    if (!PyNumber_Check(rhs))
      return NULL;
    return PyNumber_Subtract(lhs, rhs);
  } else if (fun == FUNCTOR_mul2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, true);
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, true);
    if (PySequence_Check(lhs) && (
#if PY_MAJOR_VERSION < 3
                                     PyInt_Check(rhs) ||
#endif
                                     PyLong_Check(rhs))) {
      return PySequence_Repeat(lhs, get_p_int(rhs, 0));
    }
    if (!PyNumber_Check(lhs) + !PyNumber_Check(rhs))
      return NULL;
    return PyNumber_Multiply(lhs, rhs);
  } else if (fun == FUNCTOR_div2) {
    term_t targ = PL_new_term_ref();
    PyObject *lhs, *rhs;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    lhs = term_to_python(targ, true);
    if (!PyNumber_Check(lhs))
      return NULL;
    if (!PL_get_arg(2, t, targ))
      return NULL;
    rhs = term_to_python(targ, true);
    if (!PyNumber_Check(rhs))
      return NULL;
#if PY_MAJOR_VERSION < 3
    return PyNumber_Divide(lhs, rhs);
#else
    return PyNumber_TrueDivide(lhs, rhs);
#endif
  } else if (fun == FUNCTOR_sqbrackets2) {
    //
    term_t targ = PL_new_term_ref(), trhs = PL_new_term_ref();
    PyObject *v;
    Py_ssize_t min, max;

    if (!PL_get_arg(1, t, targ))
      return NULL;
    v = term_to_python(targ, true);
    if (!PL_get_arg(2, t, targ) || !PL_get_list(targ, trhs, targ))
      return NULL;
    if (PL_is_functor(targ, FUNCTOR_colon2)) {
      if (!PL_get_arg(1, trhs, targ))
        return NULL;
      min = get_p_int(term_to_python(targ, true), 0);
      if (!PL_get_arg(2, trhs, targ))
        return NULL;
      if (PL_is_functor(targ, FUNCTOR_colon2)) {
        return NULL;
      }
      max = get_p_int(term_to_python(targ, true), PyObject_Size(v));
      if (!PySequence_Check(v))
        return NULL;
      return PySequence_GetSlice(v, min, max);
    }
  } else if (fun == FUNCTOR_dot2) {
    term_t tleft = PL_new_term_ref();
    PyObject *pArgs, *o;
    long i;
    int arity;
    atom_t name;

    o = NULL;
    while (fun == FUNCTOR_dot2) {
      if (!PL_get_arg(1, t, tleft))
        return FALSE;
      o = find_obj(o, tleft);
      if (!o)
        return FALSE;
      if (!PL_get_arg(2, t, t))
        return FALSE;
      if (!PL_get_functor(t, &fun))
        break;
    }
    if (!PL_get_name_arity(t, &name, &arity)) {
      return NULL;
    }
    if (!arity) {
      char *s;
      PyObject *pValue;

      if (!PL_get_atom_chars(t, &s))
        return NULL;
      if ((pValue = PyObject_GetAttrString(o, s)) == NULL) {
        PyErr_Print();
        return NULL;
      }
      return pValue;
    }
    o = PyObject_GetAttrString(o, PL_atom_chars(name));
    if (!o || !PyCallable_Check(o)) {
      return NULL;
    }
    pArgs = PyTuple_New(arity);
    for (i = 0; i < arity; i++) {
      PyObject *pArg;
      if (!PL_get_arg(i + 1, t, tleft))
        return NULL;
      /* ignore (_) */
      if (i == 0 && PL_is_variable(tleft)) {
        Py_DECREF(pArgs);
        pArgs = NULL;
      }
      pArg = term_to_python(tleft, true);
      if (pArg == NULL)
        return NULL;
      /* pArg reference stolen here: */
      PyTuple_SetItem(pArgs, i, pArg);
    }
    return PyObject_CallObject(o, pArgs);
  } else {
    atom_t name;
    int len;

    if (!PL_get_name_arity(t, &name, &len)) {
      return NULL;
    }
    if (name == ATOM_t) {
      term_t targ = PL_new_term_ref();
      PyObject *out;
      int i;

      out = PyTuple_New(len);
      if (!out)
        return NULL;
      for (i = 0; i < len; i++) {
        if (!PL_get_arg(i + 1, t, targ)) {
          return NULL;
        }
        PyErr_Clear();
        PyObject *oa = term_to_python(targ, true);
        PyObject *rc = PyTuple_SET_ITEM(out, i, oa);
        if (rc)
          PyErr_Print();
      }
      return out;
    }
  }
  return NULL;
}