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yap-6.3/packages/python/py2pl.c

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#include "Yap.h"
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#include "py4yap.h"
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#include <frameobject.h>
void YAPPy_ThrowError__(const char *file, const char *function, int lineno,
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yap_error_number type, term_t where, ...) {
va_list ap;
char tmpbuf[MAXPATHLEN];
YAP_Term wheret = YAP_GetFromSlot(where);
PyObject *ptype;
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if ((ptype = PyErr_Occurred()) == NULL) {
PyErr_Print();
}
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va_start(ap, where);
char *format = va_arg(ap, char *);
if (format != NULL) {
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#if HAVE_VSNPRINTF
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(void)vsnprintf(tmpbuf, MAXPATHLEN - 1, format, ap);
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#else
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(void)vsprintf(tnpbuf, format, ap);
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#endif
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// fprintf(stderr, "warning: ");
Yap_ThrowError__(file, function, lineno, type, wheret, tmpbuf);
} else {
Yap_ThrowError__(file, function, lineno, type, wheret);
}
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}
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static Term repr_term(PyObject *pVal) {
Term t = MkAddressTerm(pVal);
return Yap_MkApplTerm(FunctorObj, 1, &t);
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}
foreign_t assign_to_symbol(term_t t, PyObject *e);
foreign_t assign_to_symbol(term_t t, PyObject *e) {
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char *s = NULL;
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if (!PL_get_atom_chars(t, &s)) {
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return false;
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}
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PyObject *dic;
if (!lookupPySymbol(s, NULL, &dic))
dic = py_Main;
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Py_INCREF(e);
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return PyObject_SetAttrString(dic, s, e) == 0;
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}
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static Term python_to_term__(PyObject *pVal) {
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if (pVal == Py_None) {
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// fputs("<<*** ",stderr);Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
// >>***\n",stderr);
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return YAP_MkVarTerm();
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// fputs("<<*** ",stderr);Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
// >>***\n",stderr);
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} else if (PyBool_Check(pVal)) {
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if(PyObject_IsTrue(pVal)) return TermTrue;
return TermFalse;
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} else if (PyLong_Check(pVal)) {
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return MkIntegerTerm(PyLong_AsLong(pVal));
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#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(pVal)) {
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return MkIntegerTerm(PyInt_AsLong(pVal));
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#endif
} else if (PyFloat_Check(pVal)) {
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return MkFloatTerm(PyFloat_AsDouble(pVal));
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} else if (PyComplex_Check(pVal)) {
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Term t[2];
t[0] = MkFloatTerm(PyComplex_RealAsDouble(pVal));
t[1] = MkFloatTerm(PyComplex_ImagAsDouble(pVal));
return Yap_MkApplTerm(FunctorI, 2, t);
}
else if (PyUnicode_Check(pVal)) {
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#if PY_MAJOR_VERSION < 3
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size_t sz = PyUnicode_GetSize(pVal) + 1;
wchar_t *s = malloc(sizeof(wchar_t) * sz);
sz = PyUnicode_AsWideChar((PyUnicodeObject *)pVal, a, sz - 1);
free(ptr);
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#else
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const char *s = PyUnicode_AsUTF8(pVal);
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#endif
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#if 0
if (false && Yap_AtomInUse(s))
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rc = rc && PL_unify_atom_chars(t, s);
else
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#endif
return MkStringTerm(s);
}
else if (PyByteArray_Check(pVal)) {
return MkStringTerm(PyByteArray_AsString(pVal));
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#if PY_MAJOR_VERSION < 3
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}
else if (PyString_Check(pVal)) {
return MkStringTerm(PyString_AsString(pVal));
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#endif
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}
else if (PyTuple_Check(pVal)) {
Py_ssize_t sz = PyTuple_Size(pVal);
const char *s;
s = Py_TYPE(pVal)->tp_name;
if (s == NULL)
s = "t";
if (sz == 0) {
return MkAtomTerm(YAP_LookupAtom(Py_TYPE(pVal)->tp_name));
}
else {
Functor f = Yap_MkFunctor(Yap_LookupAtom(s), sz);
Term t = Yap_MkNewApplTerm(f, sz);
long i;
CELL *ptr = RepAppl(t) + 1;
for (i = 0; i < sz; i++) {
PyObject *p = PyTuple_GetItem(pVal, i);
if (p == NULL) {
PyErr_Clear();
return false;
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}
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*ptr++ = python_to_term__(p);
}
return t;
}
// PL_reset_term_refs(to);
// fputs(" ||*** ",stderr); Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
// ||***\n",stderr);
}
else if (PyList_Check(pVal)) {
Py_ssize_t i, sz = PyList_GET_SIZE(pVal);
if (sz == 0)
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return repr_term(pVal);
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Term t = TermNil;
for (i = sz; i > 0; --i) {
PyObject *p = PyTuple_GetItem(pVal, i);
if (p == NULL) {
PyErr_Clear();
return false;
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}
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if (!python_to_term__(p))
return false;
t = MkPairTerm(python_to_term__(p), t);
}
return t;
}
else if (PyDict_Check(pVal)) {
Py_ssize_t pos = 0;
int left = PyDict_Size(pVal);
PyObject *key, *value;
Term f, *opt = &f, t;
if (left == 0) {
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return repr_term(pVal);
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} else {
while (PyDict_Next(pVal, &pos, &key, &value)) {
Term t0[2], to;
t0[0] = python_to_term__(key);
t0[1] = python_to_term__(value);
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to = Yap_MkApplTerm(FunctorModule, 2, t0);
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if (left--) {
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t = Yap_MkNewApplTerm(FunctorComma, 2);
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*opt = t;
CELL *pt = RepAppl(t) + 1;
pt[0] = to;
opt = pt + 1;
} else {
*opt = t = to;
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}
}
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return Yap_MkApplTerm(FunctorBraces, 1, &t);
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}
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}else {
return repr_term(pVal);
}
}
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foreign_t python_to_term(PyObject *pVal, term_t t) {
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Term o = python_to_term__(pVal);
return YAP_Unify(o,YAP_GetFromSlot(t));
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}
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// extern bool Yap_do_low_level_trace;
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X_API YAP_Term pythonToYAP(PyObject *pVal) {
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// Yap_do_low_level_trace=1;
/* fputs(" *** ", stderr); */
/* PyObject_Print(pVal, stderr, 0); */
/* fputs("***>>\n", stderr); */
if (pVal == NULL)
Yap_ThrowError(SYSTEM_ERROR_INTERNAL, 0, NULL);
Term t = python_to_term__(pVal);
/* fputs("<< *** ", stderr); */
/* Yap_DebugPlWrite(t); */
/* fputs(" ***\n", stderr); */
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// Py_DECREF(pVal);
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return t;
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}
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PyObject *py_Local, *py_Global;
/**
* 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.
*/
bool python_assign(term_t t, PyObject *exp, PyObject *context) {
context = find_obj(context, t, false);
// Yap_DebugPlWriteln(yt);
switch (PL_term_type(t)) {
case PL_VARIABLE: {
if (context == NULL) // prevent a.V= N*N[N-1]
return python_to_term(exp, t);
}
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case PL_STRING: {
char *s = NULL;
size_t l;
PL_get_string_chars(t, &s,&l);
if (!context)
context = py_Main;
if (PyObject_SetAttrString(context, s, exp) == 0)
return true;
PyErr_Print();
return false;
}
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case PL_ATOM: {
char *s = NULL;
PL_get_atom_chars(t, &s);
if (!context)
context = py_Main;
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if (PyObject_SetAttrString(context, s, exp) == 0)
return true;
PyErr_Print();
return false;
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}
case PL_INTEGER:
case PL_FLOAT:
// domain or type erro?
return false;
default: {
term_t tail = PL_new_term_ref(), arg = PL_new_term_ref();
size_t len, i;
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if (PL_is_pair(t)) {
if (PL_skip_list(t, tail, &len) &&
PL_get_nil(tail)) { // true list
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if (PySequence_Check(exp) && PySequence_Length(exp) == len)
for (i = 0; i < len; i++) {
PyObject *p;
if (!PL_get_list(t, arg, t)) {
PL_reset_term_refs(tail);
p = Py_None;
}
if ((p = PySequence_GetItem(exp, i)) == NULL)
p = Py_None;
if (!python_assign(arg, p, context)) {
PL_reset_term_refs(tail);
}
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}
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}
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} else {
functor_t fun;
if (!PL_get_functor(t, &fun)) {
PL_reset_term_refs(tail);
return false;
}
if (fun == FUNCTOR_sqbrackets2) {
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// tail is the object o
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if (!PL_get_arg(2, t, tail)) {
PL_reset_term_refs(tail);
return false;
}
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PyObject *o = term_to_python(tail, true, context, false);
// t now refers to the index
if (!PL_get_arg(1, t, t) || !PL_get_list(t, t, tail) ||
!PL_get_nil(tail)) {
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PL_reset_term_refs(tail);
return false;
}
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PyObject *i = term_to_python(t, true, NULL, false);
// check numeric
if (PySequence_Check(o) && PyLong_Check(i)) {
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long int j;
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j = PyLong_AsLong(i);
return PySequence_SetItem(o, j, exp) == 0;
}
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#if PY_MAJOR_VERSION < 3
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if (PySequence_Check(o) && PyInt_Check(i)) {
long int j;
j = PyInt_AsLong(i);
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return PySequence_SetItem(o, i, exp) == 0;
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}
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#endif
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if (PyDict_Check(o)) {
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if (PyDict_SetItem(o, i, exp) == 0) {
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return true;
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}
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}
if (PyObject_SetAttr(o, i, exp) == 0) {
return true;
}
} else {
atom_t s;
int n, i;
PL_get_name_arity(t, &s, &n);
PyObject *o = term_to_python(t, true, context, true);
if (PySequence_Check(o) && PySequence_Length(o) == n) {
for (i = 1; i <= n; i++) {
PyObject *p;
if (!PL_get_arg(i, t, arg)) {
PL_reset_term_refs(tail);
o = false;
p = Py_None;
}
if ((p = PySequence_GetItem(exp, i - 1)) == NULL)
p = Py_None;
else if (!python_assign(arg, p, NULL)) {
PL_reset_term_refs(tail);
o = NULL;
}
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}
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return true;
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}
}
}
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PL_reset_term_refs(tail);
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}
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return NULL;
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}
}