#ifdef _XOPEN_SOURCE
#undef _XOPEN_SOURCE // python does its own thing
#endif
#include <Python.h>
#include <SWI-Prolog.h>
#ifdef HAVE_STAT
#undef HAVE_STATa
#endif
#include <assert.h>
//@{
/** @brief Prolog to Python library
*
*
* Please look at python.pl for more information, and to real.pl and real.c
* for related work.
*/
static atom_t ATOM_true, ATOM_false, ATOM_colon, ATOM_dot, ATOM_none, ATOM_t,
ATOM_comma, ATOM_builtin;
static functor_t FUNCTOR_dollar1, FUNCTOR_abs1, FUNCTOR_all1, FUNCTOR_any1,
FUNCTOR_bin1, FUNCTOR_brackets1, FUNCTOR_comma2, FUNCTOR_dir1,
FUNCTOR_float1, FUNCTOR_int1, FUNCTOR_iter1, FUNCTOR_iter2, FUNCTOR_long1,
FUNCTOR_len1, FUNCTOR_curly1, FUNCTOR_ord1, FUNCTOR_range1, FUNCTOR_range2,
FUNCTOR_range3, FUNCTOR_sum1, FUNCTOR_pointer1, FUNCTOR_complex2,
FUNCTOR_plus2, FUNCTOR_sub2, FUNCTOR_mul2, FUNCTOR_div2, FUNCTOR_hat2,
FUNCTOR_colon2, FUNCTOR_comma2, FUNCTOR_equal2, FUNCTOR_sqbrackets2,
FUNCTOR_dot2;
static PyObject *py_Main;
static PyObject *py_Builtin;
static PyObject *term_to_python(term_t t);
static foreign_t python_to_ptr(PyObject *pVal, term_t t);
static PyObject *atom_to_python_string(term_t t);
static int assign_python(PyObject *root, term_t t, PyObject *e);
static PyObject *ActiveModules[32];
static int active_modules = 0;
static inline int proper_ascii_string(char *s) {
unsigned char c;
while ((c = *s++)) {
if (c > 127)
return FALSE;
}
return TRUE;
}
static Py_ssize_t get_p_int(PyObject *o, Py_ssize_t def) {
if (o == NULL)
return def;
if (PyLong_Check(o)) {
return PyLong_AsLong(o);
#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(o)) {
return PyInt_AsLong(o);
#endif
}
return def;
}
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;
}
static int copy_to_dictionary(PyObject *dict, term_t targ, term_t taux) {
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);
if (!PL_get_arg(2, taux, tright)) {
return FALSE;
}
rhs = term_to_python(tright);
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);
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;
}
/**
*
* @section Python Built-Ins
*
* The Python engine includes a large number of Python built-ins. Some
* of them are interfaced here.
*/
//@{
/**
* 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);
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);
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);
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);
return PyNumber_ToBase(v, 2);
}
static PyObject *bip_float(term_t t) {
PyObject *pVal, *o;
if (!PL_get_arg(1, t, t))
return NULL;
pVal = term_to_python(t);
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);
#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);
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 = PyLong_FromLong(PyFloat_AsDouble(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);
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);
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);
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) {
long ilow;
if (!PL_get_long(arg, &ilow)) {
PyObject *low = term_to_python(arg);
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 ilow;
}
/* 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 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);
if (arity == 1) {
ihigh = ilow;
ilow = 0;
} else {
if (!PL_get_arg(2, t, arg))
return NULL;
ihigh = get_int(arg);
if (arity == 3) {
if (!PL_get_arg(3, t, arg))
return NULL;
istep = get_int(arg);
}
}
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 PyObject *atom_to_python_string(term_t t) {
// Yap_DebugPlWrite(YAP_GetFromSlot(t)); fprintf(stderr, " here I
// am\n");
char *s;
if (!PL_get_atom_chars(t, &s))
return NULL;
/* return __main__,s */
#if PY_MAJOR_VERSION < 3
if (proper_ascii_string(s)) {
return PyString_FromStringAndSize(s, strlen(s));
} else
#endif
{
PyObject *pobj = PyUnicode_DecodeUTF8(s, strlen(s), NULL);
// fprintf(stderr, "%s\n", s);
return pobj;
}
}
/**
* term_to_python translates and evaluates from Prolog to Python
*
* @param t handle to Prolog term
*
* @return a Python object descriptor or NULL if failed
*/
static PyObject *term_to_python(term_t t) {
// Yap_DebugPlWrite(YAP_GetFromSlot(t)); fprintf(stderr, " here I
// am\n");
switch (PL_term_type(t)) {
case PL_VARIABLE:
return NULL;
case PL_ATOM: {
atom_t at;
if (PL_get_atom(t, &at)) {
if (at == ATOM_true)
return Py_True;
if (at == ATOM_false)
return Py_False;
if (at == ATOM_none)
return Py_None;
else {
char *s;
if (!PL_get_atom_chars(t, &s))
return NULL;
/* return __main__,s */
PyObject *o = PyObject_GetAttrString(py_Main, s);
if (o) {
Py_IncRef(o);
return o;
} else {
PyErr_Print();
return NULL;
}
}
}
} break;
case PL_STRING: {
char *s;
if (!PL_get_chars(t, &s,
REP_UTF8 | CVT_ATOM | CVT_STRING | BUF_DISCARDABLE)) {
return NULL;
}
#if PY_MAJOR_VERSION < 3
if (proper_ascii_string(s)) {
return PyString_FromStringAndSize(s, strlen(s));
} else
#endif
{
PyObject *pobj = PyUnicode_DecodeUTF8(s, strlen(s), NULL);
// fprintf(stderr, "%s\n", s);
return pobj;
}
} break;
case PL_INTEGER: {
int64_t j;
if (!PL_get_int64_ex(t, &j))
return NULL;
#if PY_MAJOR_VERSION < 3
return PyInt_FromLong(j);
#else
return PyLong_FromLong(j);
#endif
}
case PL_FLOAT: {
double fl;
if (!PL_get_float(t, &fl))
return NULL;
return PyFloat_FromDouble(fl);
}
case PL_TERM:
if (PL_is_list(t)) {
size_t len, i;
term_t tail = PL_new_term_ref(), arg;
PyObject *out;
PL_skip_list(t, tail, &len);
if (!PL_get_nil(tail))
return NULL;
arg = tail;
out = PyList_New(len);
if (!out)
return NULL;
for (i = 0; i < len; i++) {
if (!PL_get_list(t, arg, t)) {
return NULL;
}
if (PyList_SetItem(out, i, term_to_python(arg)) < 0)
return NULL;
}
return out;
} else {
functor_t fun;
if (!PL_get_functor(t, &fun))
return NULL;
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);
} 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);
} 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);
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);
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);
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);
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))
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))
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);
if (!PL_get_arg(2, t, targ))
return NULL;
rhs = term_to_python(targ);
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);
if (!PyNumber_Check(lhs))
return NULL;
if (!PL_get_arg(2, t, targ))
return NULL;
rhs = term_to_python(targ);
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);
if (!PL_get_arg(2, t, targ))
return NULL;
rhs = term_to_python(targ);
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);
if (!PyNumber_Check(lhs))
return NULL;
if (!PL_get_arg(2, t, targ))
return NULL;
rhs = term_to_python(targ);
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);
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), 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), 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);
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);
PyObject *rc = PyTuple_SET_ITEM(out, i, oa);
if (rc)
PyErr_Print();
}
return out;
}
}
}
return NULL;
}
return NULL;
}
static foreign_t assign_to_symbol(term_t t, PyObject *e) {
char *s;
PyErr_Clear();
if (!PL_get_atom_chars(t, &s)) {
wchar_t *w;
atom_t at;
size_t len;
PyObject *attr;
if (!PL_get_atom(t, &at)) {
return false;
}
if (!(w = PL_atom_wchars(at, &len)))
return false;
attr = PyUnicode_FromWideChar(w, wcslen(w));
if (attr) {
return PyObject_SetAttr(py_Main, attr, e) >= 0;
} else {
PyErr_Print();
return false;
}
} else if (proper_ascii_string(s)) {
return PyObject_SetAttrString(py_Main, s, e) >= 0;
} else {
PyObject *attr = PyUnicode_DecodeLatin1(s, strlen(s), NULL);
if (!attr)
return -1;
return PyObject_SetAttr(py_Main, attr, e) >= 0;
}
}
static int conj_size(term_t source) {
if (PL_is_functor(source, FUNCTOR_comma2)) {
term_t a1 = PL_new_term_ref(), a2 = PL_new_term_ref();
if (PL_get_arg(1, source, a1) <= 0 || PL_get_arg(2, source, a2) <= 0)
return -1;
return conj_size(a1) + conj_size(a2);
}
return 1;
}
static int conj_copy(term_t target, PyObject *e, int pos) {
if (PL_is_functor(target, FUNCTOR_comma2)) {
term_t a1 = PL_new_term_ref(), a2 = PL_new_term_ref();
if (PL_get_arg(1, target, a1) <= 0 || PL_get_arg(2, target, a2) <= 0)
return -1;
int p1 = conj_copy(a1, e, pos);
return conj_copy(a2, e, p1);
} else {
assign_python(py_Main, target, PyTuple_GetItem(e, pos));
return pos + 1;
}
}
/** assign a tuple to something:
*/
static foreign_t python_assign_tuple(term_t t_lhs, term_t t_rhs) {
PyObject *e = term_to_python(t_rhs);
Py_ssize_t sz;
functor_t f;
if (!e || !PyTuple_Check(e)) {
return -1;
}
sz = PyTuple_Size(e);
switch (PL_term_type(t_lhs)) {
case PL_VARIABLE:
return PL_unify(t_lhs, t_rhs);
case PL_ATOM:
return assign_python(py_Main, t_rhs, e);
case PL_TERM:
if (PL_get_functor(t_lhs, &f)) {
term_t targ = PL_new_term_ref();
// assign a tuple to a tuple
if (PL_functor_name(f) == ATOM_t && ((sz = PL_functor_arity(f)))) {
int i;
for (i = 0; i < sz; i++) {
PL_get_arg(i + 1, t_lhs, targ);
assign_python(py_Main, targ, PyTuple_GetItem(e, i));
}
} else if (PL_functor_name(f) == ATOM_comma) {
int n = conj_size(t_lhs);
if (n != sz)
return -1;
return conj_copy(t_lhs, e, 0);
} else if (PL_functor_name(f) == ATOM_dot) { // vectors
size_t len;
term_t tail = PL_new_term_ref();
PL_skip_list(t_lhs, tail, &len);
if (!PL_get_nil(tail))
return -1;
term_t arg = tail;
int i;
for (i = 0; i < len; i++) {
if (!PL_get_list(t_rhs, arg, t_rhs)) {
return -1;
}
if (assign_python(py_Main, arg, PyTuple_GetItem(e, i)) < 0)
return -1;
}
}
}
}
return -1;
}
/**
* assign_python assigns the Python RHS to a Prolog term LHS, ie LHS = RHS
*
* @param root Python environment
* @param t left hand side, in Prolog, may be
* - a Prolog variable, exports the term to Prolog, A <- RHS
* - Python variable A, A <- RHS
* - Python variable $A, A <- RHS
* - Python string "A", A <- RHS
* - Python array range
* @param e the right-hand side
*
* @return -1 on failure.
*
* Note that this is an auxiliary routine to the Prolog
*python_assign.
*/
static int assign_python(PyObject *root, term_t t, PyObject *e) {
switch (PL_term_type(t)) {
case PL_VARIABLE:
if (python_to_ptr(e, t))
return 1;
else
return -1;
case PL_ATOM:
return assign_to_symbol(t, e);
case PL_STRING:
case PL_INTEGER:
case PL_FLOAT:
return -1;
case PL_TERM:
if (PL_is_list(t)) {
return -1;
} else {
functor_t fun;
if (!PL_get_functor(t, &fun))
return -1;
if (fun == FUNCTOR_dollar1) {
if (!PL_get_arg(1, t, t))
return -1;
return assign_to_symbol(t, e);
}
if (fun == FUNCTOR_pointer1) {
return -1;
}
if (fun == FUNCTOR_sqbrackets2) {
term_t targ = PL_new_term_ref(), trhs = PL_new_term_ref();
PyObject *lhs, *rhs;
if (!PL_get_arg(1, t, targ))
return -1;
lhs = term_to_python(targ);
if (!PL_get_arg(2, t, targ) || !PL_is_list(targ) ||
!PL_get_list(targ, trhs, targ))
return -1;
if (PL_is_functor(trhs, FUNCTOR_dot2)) {
Py_ssize_t left, right;
if (!PL_get_arg(1, trhs, targ))
return -1;
left = get_p_int(term_to_python(targ), 0);
if (!PL_get_arg(2, trhs, targ))
return -1;
right = get_p_int(term_to_python(targ), PyObject_Size(lhs));
if (!PySequence_Check(lhs))
return -1;
return PySequence_SetSlice(lhs, left, right, e);
} else {
rhs = term_to_python(trhs);
return PyObject_SetItem(lhs, rhs, e);
}
PL_reset_term_refs(targ);
}
}
}
return -1;
}
static foreign_t address_to_term(PyObject *pVal, term_t t) {
term_t to = PL_new_term_ref(), t1 = PL_new_term_ref();
PL_put_pointer(t1, (void *)pVal);
PL_cons_functor(to, FUNCTOR_pointer1, t1);
Py_INCREF(pVal);
foreign_t rc = PL_unify(t, to);
PL_reset_term_refs(to);
return rc;
}
static foreign_t repr_term(const char *pVal, size_t sz, term_t t) {
term_t to = PL_new_term_ref(), t1 = PL_new_term_ref();
PL_put_string_chars(t1, pVal);
PL_cons_functor(to, FUNCTOR_pointer1, t1);
Py_INCREF(pVal);
PL_reset_term_refs(to);
return PL_unify(t, to);
}
static foreign_t python_to_ptr(PyObject *pVal, term_t t) {
Py_IncRef(pVal);
return address_to_term(pVal, t);
}
static foreign_t python_to_term(PyObject *pVal, term_t t) {
if (pVal == Py_None) {
return PL_unify_atom(t, ATOM_none);
}
if (PyBool_Check(pVal)) {
if (PyObject_IsTrue(pVal)) {
return PL_unify_atom(t, ATOM_true);
} else {
return PL_unify_atom(t, ATOM_false);
}
} else if (PyLong_Check(pVal)) {
return PL_unify_int64(t, PyLong_AsLong(pVal));
#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(pVal)) {
return PL_unify_int64(t, PyInt_AsLong(pVal));
#endif
} else if (PyFloat_Check(pVal)) {
return PL_unify_float(t, PyFloat_AsDouble(pVal));
} else if (PyComplex_Check(pVal)) {
bool rc;
term_t to = PL_new_term_ref(), t1 = PL_new_term_ref(),
t2 = PL_new_term_ref();
if (!PL_put_float(t1, PyComplex_RealAsDouble(pVal)) ||
!PL_put_float(t2, PyComplex_ImagAsDouble(pVal)) ||
!PL_cons_functor(to, FUNCTOR_complex2, t1, t2)) {
rc = FALSE;
} else {
rc = PL_unify(t, to);
}
PL_reset_term_refs(to);
return rc;
} else if (PyUnicode_Check(pVal)) {
atom_t tmp_atom;
#if PY_MAJOR_VERSION < 3
Py_ssize_t sz = PyUnicode_GetSize(pVal) + 1;
wchar_t *ptr = malloc(sizeof(wchar_t) * sz);
sz = PyUnicode_AsWideChar((PyUnicodeObject *)pVal, ptr, sz - 1);
#else
Py_ssize_t sz = PyUnicode_GetLength(pVal) + 1;
wchar_t *ptr = malloc(sizeof(wchar_t) * sz);
sz = PyUnicode_AsWideChar(pVal, ptr, sz);
#endif
tmp_atom = PL_new_atom_wchars(sz, ptr);
free(ptr);
return PL_unify_atom(t, tmp_atom);
} else if (PyByteArray_Check(pVal)) {
atom_t tmp_atom = PL_new_atom(PyByteArray_AsString(pVal));
return PL_unify_atom(t, tmp_atom);
#if PY_MAJOR_VERSION < 3
} else if (PyString_Check(pVal)) {
atom_t tmp_atom = PL_new_atom(PyString_AsString(pVal));
return PL_unify_atom(t, tmp_atom);
#endif
} else if (PyTuple_Check(pVal)) {
Py_ssize_t i, sz = PyTuple_Size(pVal);
functor_t f = PL_new_functor(ATOM_t, sz);
if (!PL_unify_functor(t, f))
return FALSE;
for (i = 0; i < sz; i++) {
term_t to = PL_new_term_ref();
if (!PL_unify_arg(i + 1, t, to))
return FALSE;
if (!python_to_term(PyTuple_GetItem(pVal, i), to))
return FALSE;
}
return TRUE;
} else if (PyList_Check(pVal)) {
term_t to = PL_new_term_ref();
Py_ssize_t i, sz = PyList_GET_SIZE(pVal);
for (i = 0; i < sz; i++) {
if (!PL_unify_list(t, to, t) ||
!python_to_term(PyList_GetItem(pVal, i), to))
return FALSE;
}
return PL_unify_nil(t);
} else if (PyDict_Check(pVal)) {
Py_ssize_t pos = 0;
term_t to = PL_new_term_ref(), ti = to;
int left = PyDict_Size(pVal);
PyObject *key, *value;
while (PyDict_Next(pVal, &pos, &key, &value)) {
term_t tkey = PL_new_term_ref(), tval = PL_new_term_ref(), tint,
tnew = PL_new_term_ref();
/* do something interesting with the values... */
if (!python_to_term(key, tkey)) {
return FALSE;
}
if (!python_to_term(value, tval)) {
return FALSE;
}
/* reuse */
tint = tkey;
if (!PL_cons_functor(tint, FUNCTOR_colon2, tkey, tval)) {
return FALSE;
}
if (--left) {
if (!PL_cons_functor(tint, FUNCTOR_comma2, tint, tnew))
return FALSE;
}
if (!PL_unify(ti, tint))
return FALSE;
ti = tnew;
}
PL_cons_functor(to, FUNCTOR_curly1, to);
return PL_unify(t, to);
} else {
PyObject *pValR = PyObject_Repr(pVal);
if (pValR == NULL)
return address_to_term(pVal, t);
Py_ssize_t sz = PyUnicode_GetSize(pValR) + 1;
#if PY_MAJOR_VERSION < 3
char *s = malloc(sizeof(char) * sz);
PyObject *us = PyUnicode_EncodeUTF8((const Py_UNICODE *)pValR, sz, NULL);
PyString_AsStringAndSize(us, &s, &sz);
foreign_t rc = repr_term(s, sz, t);
free((void *)s);
return rc;
#else
// new interface
char *s = PyUnicode_AsUTF8AndSize(pVal, &sz);
return repr_term(s, sz, t);
#endif
}
}
static foreign_t python_export(term_t t, term_t pl) {
foreign_t rc = false;
if (PL_is_functor(t, FUNCTOR_pointer1)) {
void *ptr;
term_t targ = PL_new_term_ref();
if (!PL_get_arg(1, t, targ))
return false;
if (!PL_get_pointer(targ, &ptr))
return false;
Py_INCREF((PyObject *)ptr);
/* return __main__,s */
rc = python_to_term((PyObject *)ptr, pl);
}
return rc;
}
static int python_import(term_t mname, term_t mod) {
char *s;
size_t len;
PyObject *pName, *pModule;
if (PL_is_list(mname)) {
char *s2;
char str[256];
term_t arg = PL_new_term_ref();
if (!PL_get_arg(1, mname, arg) || !PL_get_atom_chars(arg, &s) ||
!PL_get_arg(2, mname, mname) || !PL_get_arg(1, mname, arg) ||
!PL_get_atom_chars(arg, &s2))
return FALSE;
strcpy(str, s);
strcat(str, ".");
strcat(str, s2);
s = str;
} else if (!PL_get_nchars(mname, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
return FALSE;
}
#if PY_MAJOR_VERSION < 3
pName = PyString_FromString(s);
#else
printf("Module=%s\n", s);
pName = PyUnicode_FromString(s);
#endif
if (pName == NULL) {
return FALSE;
}
pModule = PyImport_Import(pName);
Py_DECREF(pName);
if (pModule == NULL) {
#if EXTRA_MESSSAGES
if (PyErr_Occurred())
PyErr_Print();
PyErr_Clear();
#endif
return FALSE;
}
ActiveModules[active_modules++] = pModule;
return python_to_ptr(pModule, mod);
}
static foreign_t python_f(term_t tmod, term_t fname, term_t tf) {
char *s;
size_t len;
PyObject *pF, *pModule;
/* if an atom, fetch again */
if (PL_is_atom(tmod)) {
PyObject *pName;
if (!PL_get_nchars(fname, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
return FALSE;
}
#if PY_MAJOR_VERSION < 3
pName = PyString_FromString(s);
#else
pName = PyUnicode_FromString(s);
#endif
if (pName == NULL) {
return FALSE;
}
pModule = PyImport_Import(pName);
} else if (!(pModule = term_to_python(tmod)))
return FALSE;
if (!PL_get_nchars(fname, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
return FALSE;
}
pF = PyObject_GetAttrString(pModule, s);
PyErr_Print();
Py_DECREF(pModule);
if (pF == NULL || !PyCallable_Check(pF)) {
return FALSE;
}
printf("Module=%s ok\n", s);
return python_to_ptr(pF, tf);
}
static foreign_t python_o(term_t tmod, term_t fname, term_t tf) {
char *s;
size_t len;
PyObject *pO, *pModule;
pModule = term_to_python(tmod);
if (!PL_get_nchars(fname, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
return FALSE;
}
pO = PyObject_GetAttrString(pModule, s);
if (pO == NULL) {
return FALSE;
}
return python_to_ptr(pO, tf);
}
static foreign_t python_len(term_t tobj, term_t tf) {
Py_ssize_t len;
PyObject *o;
o = term_to_python(tobj);
if (o == NULL)
return FALSE;
len = PyObject_Length(o);
return PL_unify_int64(tf, len);
}
static foreign_t python_dir(term_t tobj, term_t tf) {
PyObject *dir;
PyObject *o;
o = term_to_python(tobj);
if (o == NULL)
return FALSE;
dir = PyObject_Dir(o);
return python_to_ptr(dir, tf);
}
static foreign_t python_index(term_t tobj, term_t tindex, term_t val) {
PyObject *i;
PyObject *o;
PyObject *f;
o = term_to_python(tobj);
if (o == NULL)
return false;
if (!PySequence_Check(o))
return false;
i = term_to_python(tindex);
if (i == NULL)
return false;
#if PY_MAJOR_VERSION < 3
f = PyObject_CallMethodObjArgs(o, PyString_FromString("getitem"), i);
#else
f = PyObject_CallMethodObjArgs(o, PyUnicode_FromString("getitem"), i);
#endif
return python_to_ptr(f, val);
}
static foreign_t python_is(term_t tobj, term_t tf) {
PyObject *o;
o = term_to_python(tobj);
if (!o)
return FALSE;
return python_to_ptr(o, tf);
}
static foreign_t python_assign_item(term_t parent, term_t indx, term_t tobj) {
PyObject *pF, *pI;
PyObject *p;
// get Scope ...
pI = term_to_python(indx);
// got Scope.Exp
// get Scope ...
p = term_to_python(parent);
// Exp
// get Scope ...
pF = term_to_python(parent);
// Exp
if (!pI || !p) {
return false;
} else if (PyObject_SetItem(p, pI, pF)) {
PyErr_Print();
return FALSE;
}
Py_DecRef(pI);
Py_DecRef(p);
return true;
}
static foreign_t python_item(term_t parent, term_t indx, term_t tobj) {
PyObject *pF, *pI;
PyObject *p;
// get Scope ...
pI = term_to_python(indx);
// got Scope.Exp
// get Scope ...
p = term_to_python(parent);
// Exp
if (!pI || !p) {
return false;
} else if ((pF = PyObject_GetItem(p, pI)) == NULL) {
PyErr_Print();
return FALSE;
}
Py_DecRef(pI);
Py_DecRef(p);
return address_to_term(pF, tobj);
}
static foreign_t python_slice(term_t parent, term_t indx, term_t tobj) {
PyObject *pF, *pI;
PyObject *p;
// get Scope ...
pI = term_to_python(indx);
// got Scope.Exp
// get Scope ...
p = term_to_python(parent);
// Exp
if (!pI || !p) {
return false;
} else if ((pF = PySequence_GetSlice(p, 0, 0)) == NULL) {
PyErr_Print();
return FALSE;
}
Py_DecRef(pI);
Py_DecRef(p);
return address_to_term(pF, tobj);
}
static foreign_t python_apply(term_t tin, term_t targs, term_t keywds,
term_t tf) {
PyObject *pF;
PyObject *pArgs, *pKeywords;
PyObject *pValue;
int i, arity;
atom_t aname;
foreign_t out;
term_t targ = PL_new_term_ref();
pF = term_to_python(tin);
if (pF == NULL) {
return false;
}
if (PL_is_atom(targs)) {
pArgs = NULL;
} else {
if (!PL_get_name_arity(targs, &aname, &arity)) {
return FALSE;
}
if (arity == 1 && PL_get_arg(1, targs, targ) && PL_is_variable(targ)) {
/* ignore (_) */
pArgs = NULL;
} else {
pArgs = PyTuple_New(arity);
if (!pArgs)
return FALSE;
for (i = 0; i < arity; i++) {
PyObject *pArg;
if (!PL_get_arg(i + 1, targs, targ))
return FALSE;
pArg = term_to_python(targ);
if (pArg == NULL)
return FALSE;
/* pArg reference stolen here: */
PyTuple_SetItem(pArgs, i, pArg);
}
}
}
if (PL_is_atom(keywds)) {
pKeywords = NULL;
} else {
pKeywords = term_to_python(keywds);
}
if (PyCallable_Check(pF)) {
pValue = PyEval_CallObjectWithKeywords(pF, pArgs, pKeywords);
// PyObject_Print(pF,stderr,0);fprintf(stderr, "\n");
// PyObject_Print(pArgs,stderr,0);fprintf(stderr, " ");
// PyObject_Print(pKeywords,stderr,0);fprintf(stderr, "\n");
if (!pValue)
PyErr_Print();
else
Py_IncRef(pValue);
} else if (pArgs == NULL) {
pValue = pF;
if (pF) {
Py_IncRef(pValue);
}
} else {
PyErr_Print();
return FALSE;
}
if (pArgs)
Py_DECREF(pArgs);
Py_DECREF(pF);
if (pValue == NULL)
return FALSE;
out = python_to_ptr(pValue, tf);
return out;
}
static foreign_t python_assign(term_t name, term_t exp) {
PyObject *e = term_to_python(exp);
if (e == NULL)
return FALSE;
return assign_python(py_Main, name, e) >= 0;
}
static foreign_t python_assign_field(term_t source, term_t name, term_t exp) {
PyObject *e = term_to_python(exp), *root = term_to_python(source);
if (e == NULL)
return FALSE;
return assign_python(root, name, e) >= 0;
}
static foreign_t python_builtin_eval(term_t caller, term_t dict, term_t out) {
PyObject *pI, *pArgs, *pOut;
PyObject *env;
atom_t name;
char *s;
int i, arity;
term_t targ = PL_new_term_ref();
if ((env = py_Builtin) == NULL) {
// no point in even trying
return false;
}
if (PL_get_name_arity(caller, &name, &arity)) {
if (!(s = PL_atom_chars(name)))
return false;
if ((pI = PyObject_GetAttrString(env, s)) == NULL) {
PyErr_Print();
return false;
}
} else {
// Prolog should make sure this never happens.
return false;
}
pArgs = PyTuple_New(arity);
for (i = 0; i < arity; i++) {
PyObject *pArg;
if (!PL_get_arg(i + 1, caller, targ))
return FALSE;
/* ignore (_) */
if (i == 0 && PL_is_variable(targ)) {
pArg = Py_None;
} else {
pArg = term_to_python(targ);
if (pArg == NULL)
return FALSE;
}
/* pArg reference stolen here: */
if (PyTuple_SetItem(pArgs, i, pArg)) {
PyErr_Print();
return false;
}
}
pOut = PyObject_CallObject(pI, pArgs);
Py_DECREF(pArgs);
Py_DECREF(pI);
if (pOut == NULL) {
PyErr_Print();
return false;
}
return python_to_ptr(pOut, out);
}
static foreign_t python_access(term_t obj, term_t f, term_t out) {
PyObject *o = term_to_python(obj), *pValue, *pArgs, *pF;
atom_t name;
char *s;
int i, arity;
term_t targ = PL_new_term_ref();
if (o == NULL)
return FALSE;
if (PL_is_atom(f)) {
if (!PL_get_atom_chars(f, &s))
return FALSE;
if ((pValue = PyObject_GetAttrString(o, s)) == NULL) {
PyErr_Print();
return FALSE;
}
return python_to_term(pValue, out);
}
if (!PL_get_name_arity(f, &name, &arity)) {
return FALSE;
}
/* follow chains of the form a.b.c.d.e() */
while (name == ATOM_dot && arity == 2) {
term_t tleft = PL_new_term_ref();
PyObject *lhs;
if (!PL_get_arg(1, f, tleft))
return FALSE;
lhs = term_to_python(tleft);
if ((o = PyObject_GetAttr(o, lhs)) == NULL) {
PyErr_Print();
return FALSE;
}
if (!PL_get_arg(2, f, f))
return FALSE;
if (!PL_get_name_arity(f, &name, &arity)) {
return FALSE;
}
}
s = PL_atom_chars(name);
if (!s)
return false;
if ((pF = PyObject_GetAttrString(o, s)) == NULL) {
PyErr_Print();
return FALSE;
}
pArgs = PyTuple_New(arity);
for (i = 0; i < arity; i++) {
PyObject *pArg;
if (!PL_get_arg(i + 1, f, targ))
return FALSE;
/* ignore (_) */
if (i == 0 && PL_is_variable(targ)) {
pArgs = Py_None;
}
pArg = term_to_python(targ);
if (pArg == NULL)
return FALSE;
/* pArg reference stolen here: */
PyTuple_SetItem(pArgs, i, pArg);
}
pValue = PyObject_CallObject(pF, pArgs);
Py_DECREF(pArgs);
Py_DECREF(pF);
if (pValue == NULL) {
return FALSE;
}
return python_to_term(pValue, out);
}
static foreign_t python_field(term_t parent, term_t att, term_t tobj) {
PyObject *pF;
atom_t name;
char *s;
int arity;
if (!PL_get_name_arity(att, &name, &arity)) {
return false;
} else {
PyObject *p;
// got Scope.Exp
// get Scope ...
p = term_to_python(parent);
// Exp
if (!PL_get_name_arity(att, &name, &arity)) {
return false;
}
s = PL_atom_chars(name);
if (arity == 1 && !strcmp(s, "()")) {
if (!PL_get_arg(1, att, att))
return false;
if (!PL_get_name_arity(att, &name, &arity)) {
return false;
}
s = PL_atom_chars(name);
}
if (!s || !p) {
return false;
} else if ((pF = PyObject_GetAttrString(p, s)) == NULL) {
PyErr_Clear();
return FALSE;
}
}
return address_to_term(pF, tobj);
}
static foreign_t python_main_module(term_t mod) {
return address_to_term(py_Main, mod);
}
static foreign_t python_function(term_t tobj) {
PyObject *obj = term_to_python(tobj);
return PyFunction_Check(obj);
}
static foreign_t end_python(void) {
Py_Finalize();
return TRUE;
}
static foreign_t array_to_python_list(term_t addr, term_t type, term_t szt,
term_t py) {
void *src;
Py_ssize_t sz, i;
int is_float;
if (!PL_get_pointer(addr, &src) || !PL_get_bool(type, &is_float) ||
!PL_get_intptr(szt, &sz))
return false;
PyObject *list = PyList_New(sz);
if (!list)
return false;
if (is_float) {
double *v = (double *)src;
for (i = 0; i < sz; i++) {
PyObject *x = PyFloat_FromDouble(v[i]);
PyList_SET_ITEM(list, i, x);
}
} else {
YAP_Int *v = (YAP_Int *)src;
for (i = 0; i < sz; i++) {
PyObject *x = PyFloat_FromDouble(v[i]);
PyList_SET_ITEM(list, i, x);
}
}
if (PL_is_variable(py)) {
return python_to_ptr(list, py);
}
return assign_to_symbol(py, list);
}
static foreign_t array_to_python_tuple(term_t addr, term_t type, term_t szt,
term_t py) {
void *src;
Py_ssize_t sz, i;
int is_float;
if (!PL_get_pointer(addr, &src) || !PL_get_bool(type, &is_float) ||
!PL_get_intptr(szt, &sz))
return false;
PyObject *list = PyTuple_New(sz);
if (!list)
return false;
if (is_float) {
double *v = (double *)src;
for (i = 0; i < sz; i++) {
PyObject *x;
x = PyFloat_FromDouble(v[i]);
if (PyTuple_SetItem(list, i, x)) {
PyErr_Print();
return FALSE;
}
}
} else {
int32_t *v = (int32_t *)src;
PyObject *x;
for (i = 0; i < sz; i++) {
#if PY_MAJOR_VERSION < 3
x = PyInt_FromLong(v[i]);
#else
x = PyLong_FromLong(v[i]);
#endif
if (PyTuple_SetItem(list, i, x)) {
PyErr_Print();
return FALSE;
}
}
}
if (PL_is_variable(py)) {
return python_to_ptr(list, py);
}
return assign_to_symbol(py, list);
}
static foreign_t array_to_python_view(term_t addr, term_t type, term_t szt,
term_t colt, term_t py) {
void *src;
Py_ssize_t sz, rows;
int is_float;
Py_ssize_t shape[2];
if (!PL_get_pointer(addr, &src) || !PL_get_bool(type, &is_float) ||
!PL_get_intptr(szt, &sz) || !PL_get_intptr(colt, &rows))
return false;
Py_buffer buf;
buf.buf = src;
if (is_float) {
buf.len = sz * sizeof(double);
buf.itemsize = sizeof(double);
} else {
buf.len = sz * sizeof(YAP_Int);
buf.itemsize = sizeof(YAP_Int);
}
buf.readonly = false;
buf.format = NULL;
buf.ndim = 2;
buf.shape = shape;
buf.strides = NULL;
buf.suboffsets = NULL;
PyObject *o = PyMemoryView_FromBuffer(&buf);
if (!o) {
PyErr_Print();
return false;
}
if (PL_is_variable(py)) {
return python_to_ptr(o, py);
}
return assign_to_symbol(py, o);
}
static foreign_t python_run_file(term_t file) {
char *s;
size_t len;
char si[256];
s = si;
if (PL_get_nchars(file, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
#if PY_MAJOR_VERSION < 3
PyObject *PyFileObject = PyFile_FromString(si, "r");
PyRun_SimpleFileEx(PyFile_AsFile(PyFileObject), "test.py", 1);
#else
FILE *f = fopen(s, "r");
if (f == NULL)
return false;
PyRun_SimpleFileEx(f, s, 1);
#endif
return TRUE;
}
return false;
}
static foreign_t python_run_command(term_t cmd) {
char *s;
size_t len;
char si[256];
s = si;
if (PL_get_nchars(cmd, &len, &s, CVT_ALL | CVT_EXCEPTION)) {
PyRun_SimpleString(s);
}
return TRUE;
}
static foreign_t python_run_script(term_t cmd, term_t fun) {
char si[256], sf[256];
size_t len = 255, len1 = 255;
PyObject *pName, *pModule, *pFunc;
PyObject *pArgs = NULL, *pValue;
char *s;
s = si;
if (PL_get_nchars(cmd, &len, &s, CVT_ALL | CVT_EXCEPTION) &&
(s = sf) != NULL &&
PL_get_nchars(fun, &len1, &s, CVT_ALL | CVT_EXCEPTION)) {
#if PY_MAJOR_VERSION < 3
pName = PyString_FromString("rbm");
#else
// asssumes UTF-8
pName = PyUnicode_FromString("rbm");
#endif
/* Error checking of pName left out */
pModule = PyImport_Import(pName);
Py_DECREF(pName);
if (pModule != NULL) {
pFunc = PyObject_GetAttrString(pModule, sf);
/* pFunc is a new reference */
if (pFunc && PyCallable_Check(pFunc)) {
pValue = PyObject_CallObject(pFunc, pArgs);
if (pValue != NULL) {
Py_DECREF(pValue);
} else {
Py_DECREF(pFunc);
Py_DECREF(pModule);
PyErr_Print();
fprintf(stderr, "Call failed\n");
return false;
}
} else {
if (PyErr_Occurred())
PyErr_Print();
fprintf(stderr, "Cannot find function \"%s\"\n", sf);
}
Py_XDECREF(pFunc);
Py_DECREF(pModule);
} else {
PyErr_Print();
fprintf(stderr, "Failed to load \"%s\"\n", s);
return false;
}
return true;
}
return false;
}
static foreign_t python_builtin(term_t out) {
return address_to_term(py_Builtin, out);
}
static foreign_t init_python(void) {
char **argv;
term_t t = PL_new_term_ref();
YAP_Argv(&argv);
if (argv) {
#if PY_MAJOR_VERSION < 3
Py_SetProgramName(argv[0]);
#else
wchar_t *buf = Py_DecodeLocale(argv[0], NULL);
Py_SetProgramName(buf);
#endif
}
Py_Initialize();
py_Main = PyImport_AddModule("__main__");
py_Builtin = PyImport_AddModule("__builtin__");
// PL_put_atom( t, ATOM_builtin);
// py_Builtin = term_to_python(t);
PL_reset_term_refs(t);
return TRUE;
}
install_t install_libpython(void);
install_t install_libpython(void) {
FUNCTOR_dot2 = PL_new_functor(PL_new_atom("."), 2);
// FUNCTOR_equal2 = PL_new_functor(PL_new_atom("="), 2);
// FUNCTOR_boolop1 = PL_new_functor(PL_new_atom("@"), 1);
ATOM_builtin = PL_new_atom("__builtin__");
ATOM_comma = PL_new_atom(",");
ATOM_colon = PL_new_atom(":");
ATOM_true = PL_new_atom("true");
ATOM_false = PL_new_atom("false");
ATOM_dot = PL_new_atom(".");
ATOM_none = PL_new_atom("none");
ATOM_t = PL_new_atom("t");
FUNCTOR_abs1 = PL_new_functor(PL_new_atom("abs"), 1);
FUNCTOR_all1 = PL_new_functor(PL_new_atom("all"), 1);
FUNCTOR_any1 = PL_new_functor(PL_new_atom("any"), 1);
FUNCTOR_bin1 = PL_new_functor(PL_new_atom("bin"), 1);
FUNCTOR_ord1 = PL_new_functor(PL_new_atom("ord"), 1);
FUNCTOR_int1 = PL_new_functor(PL_new_atom("int"), 1);
FUNCTOR_long1 = PL_new_functor(PL_new_atom("long"), 1);
FUNCTOR_float1 = PL_new_functor(PL_new_atom("float"), 1);
FUNCTOR_curly1 = PL_new_functor(PL_new_atom("{}"), 1);
FUNCTOR_dollar1 = PL_new_functor(PL_new_atom("$"), 1);
FUNCTOR_pointer1 = PL_new_functor(PL_new_atom("__obj__"), 1);
FUNCTOR_dir1 = PL_new_functor(PL_new_atom("dir"), 1);
FUNCTOR_iter1 = PL_new_functor(PL_new_atom("iter"), 1);
FUNCTOR_iter2 = PL_new_functor(PL_new_atom("iter"), 2);
FUNCTOR_len1 = PL_new_functor(PL_new_atom("len"), 1);
FUNCTOR_range1 = PL_new_functor(PL_new_atom("range"), 1);
FUNCTOR_range2 = PL_new_functor(PL_new_atom("range"), 2);
FUNCTOR_range3 = PL_new_functor(PL_new_atom("range"), 3);
FUNCTOR_sum1 = PL_new_functor(PL_new_atom("sum"), 1);
FUNCTOR_complex2 = PL_new_functor(PL_new_atom("i"), 2);
FUNCTOR_plus2 = PL_new_functor(PL_new_atom("+"), 2);
FUNCTOR_sub2 = PL_new_functor(PL_new_atom("-"), 2);
FUNCTOR_mul2 = PL_new_functor(PL_new_atom("*"), 2);
FUNCTOR_div2 = PL_new_functor(PL_new_atom("/"), 2);
FUNCTOR_hat2 = PL_new_functor(PL_new_atom("^"), 2);
FUNCTOR_colon2 = PL_new_functor(PL_new_atom(":"), 2);
FUNCTOR_comma2 = PL_new_functor(PL_new_atom(","), 2);
FUNCTOR_equal2 = PL_new_functor(PL_new_atom("="), 2);
FUNCTOR_sqbrackets2 = PL_new_functor(PL_new_atom("[]"), 2);
PL_register_foreign("init_python", 0, init_python, 0);
PL_register_foreign("end_python", 0, end_python, 0);
PL_register_foreign("python_import", 2, python_import, 0);
PL_register_foreign("python_f", 3, python_f, 0);
PL_register_foreign("python_o", 3, python_o, 0);
PL_register_foreign("python_len", 2, python_len, 0);
PL_register_foreign("python_is", 2, python_is, 0);
PL_register_foreign("python_dir", 2, python_dir, 0);
PL_register_foreign("python_apply", 4, python_apply, 0);
PL_register_foreign("python_index", 3, python_index, 0);
PL_register_foreign("python_access", 3, python_access, 0);
PL_register_foreign("python_field", 3, python_field, 0);
PL_register_foreign("python_assign", 2, python_assign, 0);
PL_register_foreign("python_assign_field", 3, python_assign_field, 0);
PL_register_foreign("python_assign_tuple", 2, python_assign_tuple, 0);
PL_register_foreign("python_export", 2, python_export, 0);
PL_register_foreign("python_function", 1, python_function, 0);
PL_register_foreign("python_slice", 4, python_slice, 0);
PL_register_foreign("python_item", 3, python_item, 0);
PL_register_foreign("python_assign_item", 3, python_assign_item, 0);
PL_register_foreign("python_run_file", 1, python_run_file, 0);
PL_register_foreign("python_run_command", 1, python_run_command, 0);
PL_register_foreign("python_run_script", 2, python_run_script, 0);
PL_register_foreign("python_main_module", 1, python_main_module, 0);
PL_register_foreign("array_to_python_list", 4, array_to_python_list, 0);
PL_register_foreign("array_to_python_tuple", 4, array_to_python_tuple, 0);
PL_register_foreign("array_to_python_view", 5, array_to_python_view, 0);
PL_register_foreign("python_builtin_eval", 3, python_builtin_eval, 0);
PL_register_foreign("python_builtin", 1, python_builtin, 0);
}