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yap-6.3/packages/python/python.c

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2012-10-08 23:58:22 +01:00
#include <SWI-Stream.h>
#include <SWI-Prolog.h>
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#ifdef HAVE_STAT
#undef HAVE_STAT
#endif
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#include <Python.h>
#include <assert.h>
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static atom_t ATOM_true,
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ATOM_colon,
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ATOM_false,
ATOM_t;
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static functor_t FUNCTOR_dollar1,
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FUNCTOR_abs1,
FUNCTOR_all1,
FUNCTOR_any1,
FUNCTOR_bin1,
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FUNCTOR_dir1,
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FUNCTOR_float1,
FUNCTOR_int1,
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FUNCTOR_iter1,
FUNCTOR_iter2,
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FUNCTOR_long1,
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FUNCTOR_len1,
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FUNCTOR_curly1,
FUNCTOR_ord1,
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FUNCTOR_range1,
FUNCTOR_range2,
FUNCTOR_range3,
FUNCTOR_sum1,
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FUNCTOR_pointer1,
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FUNCTOR_complex2,
FUNCTOR_plus2,
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FUNCTOR_sub2,
FUNCTOR_mul2,
FUNCTOR_div2,
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FUNCTOR_hat2,
FUNCTOR_colon2,
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FUNCTOR_comma2,
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FUNCTOR_equal2;
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static PyObject *py_Main;
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static PyObject *term_to_python(term_t t);
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static PyObject *ActiveModules[32];
static int active_modules = 0;
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static inline int
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proper_ascii_string(char *s)
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{
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unsigned char c;
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while ((c = *s++)) {
if (c > 127)
return FALSE;
}
return TRUE;
}
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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);
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#if PY_MAJOR_VERSION < 3
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} else if (PyInt_Check(o)) {
return PyInt_AsLong(o);
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#endif
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}
return def;
}
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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) {
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#if PY_MAJOR_VERSION<3
pName = PyString_FromString(s);
#else
pName = PyUnicode_FromString(s);
#endif
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if (pName == NULL) {
return NULL;
}
if (( out = PyImport_Import(pName))) {
return out;
}
}
if (!ob && py_Main && (out = PyObject_GetAttrString(py_Main, s) ) )
return out;
return NULL;
}
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static int
copy_to_dictionary(PyObject *dict, term_t targ, term_t taux)
{
PyObject *lhs, *rhs;
term_t tleft = taux, tright = tleft;
if (!PL_get_arg(1, targ, tleft)) {
return FALSE;
}
lhs = term_to_python(tleft);
if (!PL_get_arg(2, targ, 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);
return TRUE;
}
static PyObject *
bip_abs(term_t t)
{
PyObject *pVal;
if (! PL_get_arg(1, t, t) )
return NULL;
pVal = term_to_python(t);
return PyNumber_Absolute(pVal);
}
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;
}
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);
}
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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) );
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#if PY_MAJOR_VERSION<3
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} else if (PyInt_Check(pVal)) {
o = PyFloat_FromDouble( PyInt_AsLong(pVal) );
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#endif
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} 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);
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#if PY_MAJOR_VERSION<3
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if (PyLong_Check(pVal)) {
o = PyInt_FromLong( PyLong_AsLong(pVal) );
} else if (PyInt_Check(pVal)) {
return pVal;
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#else
if (PyLong_Check(pVal)) {
return pVal;
#endif
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} else if (PyFloat_Check(pVal)) {
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#if PY_MAJOR_VERSION<3
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o = PyInt_FromLong( PyFloat_AsDouble(pVal) );
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#else
o = PyLong_FromDouble( PyFloat_AsDouble(pVal) );
#endif
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} 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;
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#if PY_MAJOR_VERSION<3
} else if (PyInt_Check(pVal)) {
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o = PyLong_FromLong( PyInt_AsLong(pVal) );
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#endif
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} else if (PyFloat_Check(pVal)) {
o = PyLong_FromLong( PyFloat_AsDouble(pVal) );
} else
return NULL;
Py_DECREF(pVal);
return o;
}
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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);
}
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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)) {
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#if PY_MAJOR_VERSION < 3
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size = PyUnicode_GET_SIZE(pVal);
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#else
size = PyUnicode_GetLength(pVal);
#endif
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if (size == 1) {
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#if PY_MAJOR_VERSION < 3
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long ord = (long)*PyUnicode_AS_UNICODE(pVal);
return PyInt_FromLong(ord);
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#else
Py_UCS4 ord = PyUnicode_ReadChar(pVal, 0);
return PyLong_FromLong(ord);
#endif
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}
return NULL;
} else if (PyByteArray_Check(pVal)) {
char *s = PyByteArray_AsString(pVal);
if (s[1])
return NULL;
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#if PY_MAJOR_VERSION < 3
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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]);
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#else
return PyLong_FromLong(s[0]);
#endif
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} else
return NULL;
}
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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) {
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#if PY_MAJOR_VERSION < 3
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result = PyInt_FromLong(0);
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#else
result = PyLong_FromLong(0);
#endif
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if (result == NULL) {
Py_DECREF(iter);
return NULL;
}
} else {
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#if PY_MAJOR_VERSION < 3
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/* 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);
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#endif
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}
#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.
*/
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#if PY_MAJOR_VERSION < 3
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if (PyInt_CheckExact(result)) {
long i_result = PyInt_AS_LONG(result);
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#else
if (PyLong_CheckExact(result)) {
long i_result = PyLong_AS_LONG(result);
#endif
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Py_DECREF(result);
result = NULL;
while(result == NULL) {
item = PyIter_Next(iter);
if (item == NULL) {
Py_DECREF(iter);
if (PyErr_Occurred())
return NULL;
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#if PY_MAJOR_VERSION < 3
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return PyInt_FromLong(i_result);
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#else
return PyLong_FromLong(i_result);
#endif
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}
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#if PY_MAJOR_VERSION < 3
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if (PyInt_CheckExact(item)) {
long b = PyInt_AS_LONG(item);
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#else
if (PyLong_CheckExact(item)) {
long b = PyLong_AS_LONG(item);
#endif
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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 */
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#if PY_MAJOR_VERSION < 3
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result = PyInt_FromLong(i_result);
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#else
result = PyLong_FromLong(i_result);
#endif
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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;
}
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#if PY_MAJOR_VERSION < 3
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if (PyInt_CheckExact(item)) {
PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
f_result += (double)PyInt_AS_LONG(item);
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#else
if (PyLong_CheckExact(item)) {
PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
f_result += PyLong_AsDouble(item);
#endif
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PyFPE_END_PROTECT(f_result)
Py_DECREF(item);
continue;
}
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);
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#if PY_MAJOR_VERSION < 3
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} else if (PyInt_Check(low)) {
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return PyInt_AsLong(low);
#endif
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} 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++) {
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#if PY_MAJOR_VERSION < 3
PyObject *w = PyInt_FromLong(ilow);
#else
PyObject *w = PyLong_FromLong(ilow);
#endif
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if (w == NULL) {
Py_DECREF(v);
return NULL;
}
PyList_SET_ITEM(v, i, w);
ilow += istep;
}
return v;
}
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static PyObject *
term_to_python(term_t t)
{
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// Yap_DebugPlWrite(YAP_GetFromSlot(t)); fprintf(stderr, " here I am\n");
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switch (PL_term_type(t)) {
case PL_VARIABLE:
return NULL;
case PL_ATOM:
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case PL_STRING:
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{
char *s;
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atom_t at;
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if (PL_get_atom(t, &at)) {
if (at == ATOM_true) return Py_True;
if (at == ATOM_false) return Py_False;
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}
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if (!PL_get_chars(t, &s, REP_UTF8|CVT_ATOM|CVT_STRING|BUF_DISCARDABLE) ) {
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return NULL;
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}
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#if PY_MAJOR_VERSION < 3
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if (proper_ascii_string(s)) {
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return PyString_FromStringAndSize(s, strlen(s) );
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} else
#endif
{
PyObject *pobj = PyUnicode_DecodeUTF8(s, strlen(s), NULL);
//fprintf(stderr, "%s\n", s);
return pobj;
}
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}
case PL_INTEGER:
{
int64_t j;
if (!PL_get_int64_ex(t, &j))
return NULL;
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#if PY_MAJOR_VERSION < 3
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return PyInt_FromLong(j);
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#else
return PyLong_FromLong(j);
#endif
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}
case PL_FLOAT:
{
double fl;
if (!PL_get_float(t, &fl))
return NULL;
return PyFloat_FromDouble( fl );
}
case PL_TERM:
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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;
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} 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;
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Py_INCREF((PyObject *)ptr);
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/* return __main__,s */
return (PyObject *)ptr;
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} 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);
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} 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);
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} 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);
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} 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) {
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term_t targ = PL_new_term_ref();
PyObject *lhs, *rhs;
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double d1, d2;
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if (! PL_get_arg(1, t, targ) )
return NULL;
lhs = term_to_python(targ);
if (!PyNumber_Check(lhs))
return NULL;
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if (PyFloat_Check(lhs)) {
d1 = PyFloat_AsDouble(lhs);
} else if (PyLong_Check(lhs)) {
d1 = PyLong_AsLong(lhs);
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#if PY_MAJOR_VERSION < 3
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} else if (PyInt_Check(lhs)) {
d1 = PyInt_AsLong(lhs);
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#endif
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} 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);
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#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(rhs)) {
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d2 = PyInt_AsLong(rhs);
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#endif
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} else {
return NULL;
}
return PyComplex_FromDoubles(d1, d2);
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} 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;
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} 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);
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if (! PL_get_arg(2, t, targ) )
return NULL;
rhs = term_to_python(targ);
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if (PySequence_Check(lhs) && PySequence_Check(rhs)) {
return PySequence_Concat(lhs, rhs);
}
if (!PyNumber_Check(lhs))
return NULL;
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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);
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if (PySequence_Check(lhs) && (
#if PY_MAJOR_VERSION < 3
PyInt_Check(rhs) ||
#endif
PyLong_Check(rhs)) ){
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return PySequence_Repeat(lhs, get_p_int(rhs, 0));
}
if (!PyNumber_Check(lhs)+!PyNumber_Check(rhs))
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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;
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#if PY_MAJOR_VERSION < 3
return
PyNumber_Divide(lhs, rhs);
#else
return
PyNumber_TrueDivide(lhs, rhs);
#endif
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} else if (fun == FUNCTOR_hat2) {
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term_t targ = PL_new_term_ref(), trhs = PL_new_term_ref();
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PyObject *lhs, *rhs;
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if (! PL_get_arg(1, t, targ))
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return NULL;
lhs = term_to_python(targ);
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if (! PL_get_arg(2, t, targ) || !PL_is_list(targ) || !PL_get_list(targ, trhs, targ) )
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return NULL;
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if (PL_is_functor(trhs, FUNCTOR_colon2) ) {
Py_ssize_t left, right;
if (!PL_get_arg(1, trhs, targ))
return NULL;
left = get_p_int(term_to_python(targ), 0);
if (!PL_get_arg(2, trhs, targ))
return NULL;
right = get_p_int(term_to_python(targ), PyObject_Size(lhs) );
if (!PySequence_Check(lhs))
return NULL;
return PySequence_GetSlice(lhs, left, right);
} else {
rhs = term_to_python(trhs);
return PyObject_GetItem(lhs, rhs);
}
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} else if (fun == FUNCTOR_colon2) {
term_t tleft = PL_new_term_ref();
PyObject *pArgs, *o;
long i;
int arity;
atom_t name;
o = NULL;
while (fun == FUNCTOR_colon2) {
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);
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} 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;
}
if (PyTuple_SetItem(out, i, term_to_python(targ)) < 0)
return NULL;
}
return out;
}
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}
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}
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return NULL;
}
return NULL;
}
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static int
assign_python(PyObject *root, term_t t, PyObject *e)
{
switch (PL_term_type(t)) {
case PL_VARIABLE:
return -1;
case PL_ATOM:
{
char *s;
if (!PL_get_atom_chars(t, &s)) {
wchar_t *w;
atom_t at;
size_t len;
PyObject *wo;
if (!PL_get_atom(t, &at))
return -1;
if (!(w = PL_atom_wchars(at, &len)))
return -1;
wo = PyUnicode_FromWideChar(w, wcslen(w) );
return PyObject_SetAttr(root, wo, e);
}
if (proper_ascii_string(s)) {
return PyObject_SetAttrString(root, s, e);
} else {
PyObject *wo= PyUnicode_DecodeLatin1(s, strlen(s), NULL);
return PyObject_SetAttr(root, wo, e);
}
}
case PL_INTEGER:
case PL_STRING:
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) {
char *s;
if (! PL_get_arg(1, t, t) )
return -1;
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 -1;
}
if (!(w = PL_atom_wchars(at, &len)))
return -1;
attr = PyUnicode_FromWideChar(w, wcslen(w) );
if (!attr)
return -1;
return PyObject_SetAttr(py_Main, attr, e);
}
if (proper_ascii_string(s)) {
return PyObject_SetAttrString(py_Main, s, e);
} else {
PyObject *attr= PyUnicode_DecodeLatin1(s, strlen(s), NULL);
if (!attr)
return -1;
return PyObject_SetAttr(py_Main, attr, e);
}
} else if (fun == FUNCTOR_pointer1) {
return -1;
} else if (fun == FUNCTOR_hat2) {
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;
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if (PL_is_functor(trhs, FUNCTOR_colon2) ) {
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);
}
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}
}
return -1;
}
return -1;
}
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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);
return PL_unify(t, to);
}
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static foreign_t
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python_to_term(PyObject *pVal, term_t t)
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{
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if (PyBool_Check(pVal)) {
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if (PyObject_IsTrue(pVal)) {
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return PL_unify_atom(t, ATOM_true);
} else {
return PL_unify_atom(t, ATOM_false);
}
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} else if (PyLong_Check(pVal)) {
return PL_unify_int64(t, PyLong_AsLong(pVal));
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#if PY_MAJOR_VERSION < 3
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} else if (PyInt_Check(pVal)) {
return PL_unify_int64(t, PyInt_AsLong(pVal));
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#endif
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} else if (PyFloat_Check(pVal)) {
return PL_unify_float(t, PyFloat_AsDouble(pVal));
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} else if (PyComplex_Check(pVal)) {
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) )
return FALSE;
return PL_unify(t, to);
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} else if (PyUnicode_Check(pVal)) {
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atom_t tmp_atom;
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#if PY_MAJOR_VERSION < 3
Py_ssize_t sz = PyUnicode_GetSize(pVal)+1;
wchar_t *ptr = malloc(sizeof(wchar_t)*sz);
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sz = PyUnicode_AsWideChar((PyUnicodeObject *)pVal, ptr, sz-1);
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#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);
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free(ptr);
return PL_unify_atom(t, tmp_atom);
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} else if (PyByteArray_Check(pVal)) {
atom_t tmp_atom = PL_new_atom(PyByteArray_AsString(pVal));
return PL_unify_atom(t, tmp_atom);
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#if PY_MAJOR_VERSION < 3
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} else if (PyString_Check(pVal)) {
atom_t tmp_atom = PL_new_atom(PyString_AsString(pVal));
return PL_unify_atom(t, tmp_atom);
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#endif
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} else if (PyTuple_Check(pVal)) {
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Py_ssize_t i, sz = PyTuple_Size(pVal);
functor_t f = PL_new_functor(ATOM_t, sz);
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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;
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} 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) ||
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!python_to_term(PyList_GetItem(pVal, i), to))
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return FALSE;
}
return PL_unify_nil(t);
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} 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);
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} else {
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return address_to_term(pVal, t);
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}
}
static int
python_import(term_t mname, term_t mod)
{
char *s;
size_t len;
PyObject *pName, *pModule;
if ( !PL_get_nchars(mname, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
return FALSE;
}
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#if PY_MAJOR_VERSION < 3
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pName = PyString_FromString(s);
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#else
pName = PyUnicode_FromString(s);
#endif
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if (pName == NULL) {
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return FALSE;
}
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pModule = PyImport_Import(pName);
Py_DECREF(pName);
if (pModule == NULL) {
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PyErr_Clear();
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return FALSE;
}
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ActiveModules[active_modules++] = pModule;
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return python_to_term(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;
}
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#if PY_MAJOR_VERSION < 3
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pName = PyString_FromString(s);
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#else
pName = PyUnicode_FromString(s);
#endif
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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);
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PyErr_Print();
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Py_DECREF(pModule);
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if (pF == NULL || ! PyCallable_Check(pF)) {
return FALSE;
}
return python_to_term(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_term(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_term(dir, tf);
}
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_term(o, tf);
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}
static foreign_t
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python_apply(term_t tin, term_t targs, term_t keywds, term_t tf)
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{
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PyObject *pF, *pValue;
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PyObject *pArgs, *pKeywords;
int i, arity;
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atom_t aname;
foreign_t out;
term_t targ = PL_new_term_ref();
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pF = term_to_python(tin);
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if ( pF == NULL ) {
return FALSE;
}
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if (PL_is_atom(keywds) )
pKeywords = NULL;
else
pKeywords = term_to_python(keywds);
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if (! PL_get_name_arity( targs, &aname, &arity) ) {
return FALSE;
}
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if (aname == ATOM_t) {
if (arity == 0)
pArgs = NULL;
else
pArgs = term_to_python( targs );
} else {
pArgs = PyTuple_New(arity);
if (!pArgs)
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return FALSE;
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for (i = 0 ; i < arity; i++) {
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PyObject *pArg;
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if (! PL_get_arg(i+1, targs, targ) )
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return FALSE;
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/* ignore (_) */
if (i == 0 && PL_is_variable(targ)) {
Py_DECREF(pArgs);
pArgs = NULL;
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break;
}
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pArg = term_to_python(targ);
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if (pArg == NULL)
return FALSE;
/* pArg reference stolen here: */
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PyTuple_SetItem(pArgs, i, pArg);
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}
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}
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if (PyCallable_Check(pF)) {
if (!pKeywords)
pValue = PyObject_CallObject(pF, pArgs);
else {
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pValue = PyObject_Call(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");
}
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if (!pValue)
PyErr_Print();
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} else {
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PyErr_Print();
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return FALSE;
}
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if (pArgs)
Py_DECREF(pArgs);
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Py_DECREF(pF);
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if (pValue == NULL)
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return FALSE;
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out = python_to_term(pValue, tf);
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Py_DECREF(pValue);
return out;
}
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static foreign_t
python_assign(term_t name, term_t exp)
{
PyObject *e = term_to_python(exp);
if (e == NULL)
return FALSE;
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return assign_python(py_Main, name, e) >= 0;
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}
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;
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if ((pValue = PyObject_GetAttrString(o, s)) == NULL) {
PyErr_Print();
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return FALSE;
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}
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return python_to_term(pValue, out);
}
if (! PL_get_name_arity( f, &name, &arity) ) {
return FALSE;
}
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/* follow chains of the form a.b.c.d.e() */
while (name == ATOM_colon && 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;
}
}
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s = PL_atom_chars(name);
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if ((pF = PyObject_GetAttrString(o, s)) == NULL) {
PyErr_Print();
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return FALSE;
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}
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pArgs = PyTuple_New(arity);
for (i = 0 ; i < arity; i++) {
PyObject *pArg;
if (! PL_get_arg(i+1, f, targ) )
return FALSE;
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/* ignore (_) */
if (i == 0 && PL_is_variable(targ)) {
Py_DECREF(pArgs);
pArgs = NULL;
}
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pArg = term_to_python(targ);
if (pArg == NULL)
return FALSE;
/* pArg reference stolen here: */
PyTuple_SetItem(pArgs, i, pArg);
}
pValue = PyObject_CallObject(pF, pArgs);
if (pValue == NULL) {
Py_DECREF(pArgs);
Py_DECREF(pF);
return FALSE;
}
Py_DECREF(pArgs);
Py_DECREF(pF);
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return python_to_term(pValue, out);
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}
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static foreign_t
python_field(term_t f, term_t tobj, term_t tname, term_t tout)
{
PyObject *o = NULL, *pF;
atom_t name;
char *s;
int arity;
if (! PL_get_name_arity( f, &name, &arity) ) {
return FALSE;
}
/* follow chains of the form a.b.c.d.e() */
while (name == ATOM_colon && 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 == NULL) {
o = lhs;
} else if ((o = PyObject_GetAttr(o, lhs)) == NULL) {
// PyErr_Print();
PyErr_Clear();
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 || !o) {
return FALSE;
} else if ((pF = PyObject_GetAttrString(o, s)) == NULL) {
// PyErr_Print();
PyErr_Clear();
return FALSE;
}
return
address_to_term(pF, tobj) &&
PL_unify_atom(tname, name) &&
PL_unify(tout, f);
}
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);
}
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static foreign_t
python_run_command(term_t cmd)
{
char *s;
size_t len;
if ( PL_get_nchars(cmd, &len, &s, CVT_ALL|CVT_EXCEPTION) ) {
PyRun_SimpleString(s);
return TRUE;
}
return FALSE;
}
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static foreign_t
init_python(void)
{
Py_Initialize();
py_Main = PyImport_AddModule("__main__");
return TRUE;
}
static foreign_t
end_python(void)
{
Py_Finalize();
return TRUE;
}
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install_t install_python(void);
install_t
install_python(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);
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ATOM_colon = PL_new_atom(":");
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ATOM_true = PL_new_atom("true");
ATOM_false = PL_new_atom("false");
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ATOM_t = PL_new_atom("t");
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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);
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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);
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FUNCTOR_curly1 = PL_new_functor(PL_new_atom("{}"), 1);
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FUNCTOR_dollar1 = PL_new_functor(PL_new_atom("$"), 1);
FUNCTOR_pointer1 = PL_new_functor(PL_new_atom("__obj__"), 1);
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FUNCTOR_dir1 = PL_new_functor(PL_new_atom("dir"), 1);
FUNCTOR_iter1 = PL_new_functor(PL_new_atom("iter"), 1);
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FUNCTOR_iter2 = PL_new_functor(PL_new_atom("iter"), 2);
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FUNCTOR_len1 = PL_new_functor(PL_new_atom("len"), 1);
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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);
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FUNCTOR_complex2 = PL_new_functor(PL_new_atom("complex"), 2);
FUNCTOR_plus2 = PL_new_functor(PL_new_atom("+"), 2);
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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);
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FUNCTOR_colon2 = PL_new_functor(PL_new_atom(":"), 2);
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FUNCTOR_comma2 = PL_new_functor(PL_new_atom(","), 2);
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FUNCTOR_equal2 = PL_new_functor(PL_new_atom("="), 2);
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PL_register_foreign("init_python", 0, init_python, 0);
PL_register_foreign("end_python", 0, end_python, 0);
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PL_register_foreign("python_import", 2, python_import, 0);
PL_register_foreign("python_f", 3, python_f, 0);
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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);
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PL_register_foreign("python_apply", 4, python_apply, 0);
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PL_register_foreign("python_access", 3, python_access, 0);
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PL_register_foreign("python_field", 4, python_field, 0);
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PL_register_foreign("python_assign", 2, python_assign, 0);
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PL_register_foreign("python_function", 1, python_function, 0);
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PL_register_foreign("python_run_command", 1, python_run_command, 0);
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PL_register_foreign("python_main_module", 1, python_main_module, 0);
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}
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