271 lines
7.6 KiB
C
271 lines
7.6 KiB
C
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#include "python.h"
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static foreign_t repr_term(const char *pVal, size_t sz, term_t t) {
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term_t to = PL_new_term_ref(), t1 = PL_new_term_ref();
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PL_put_string_chars(t1, pVal);
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PL_cons_functor(to, FUNCTOR_pointer1, t1);
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Py_INCREF(pVal);
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PL_reset_term_refs(to);
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return PL_unify(t, to);
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}
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foreign_t assign_to_symbol(term_t t, PyObject *e);
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/**
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* assign_python assigns the Python RHS to a Prolog term LHS, ie LHS = RHS
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*
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* @param root Python environment
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* @param t left hand side, in Prolog, may be
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* - a Prolog variable, exports the term to Prolog, A <- RHS
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* - Python variable A, A <- RHS
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* - Python variable $A, A <- RHS
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* - Python string "A", A <- RHS
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* - Python array range
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* @param e the right-hand side
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*
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* @return -1 on failure.
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*
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* Note that this is an auxiliary routine to the Prolog
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*python_assign.
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*/
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int assign_python(PyObject *root, term_t t, PyObject *e) {
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switch (PL_term_type(t)) {
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case PL_VARIABLE:
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if (python_to_ptr(e, t))
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return 1;
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else
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return -1;
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case PL_ATOM:
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return assign_to_symbol(t, e);
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case PL_STRING:
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case PL_INTEGER:
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case PL_FLOAT:
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return -1;
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case PL_TERM:
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if (PL_is_list(t)) {
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return -1;
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} else {
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functor_t fun;
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if (!PL_get_functor(t, &fun))
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return -1;
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if (fun == FUNCTOR_dollar1) {
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if (!PL_get_arg(1, t, t))
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return -1;
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return assign_to_symbol(t, e);
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}
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if (fun == FUNCTOR_pointer1) {
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return -1;
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}
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if (fun == FUNCTOR_sqbrackets2) {
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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 -1;
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lhs = term_to_python(targ, true);
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if (!PL_get_arg(2, t, targ) || !PL_is_list(targ) ||
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!PL_get_list(targ, trhs, targ))
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return -1;
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if (PL_is_functor(trhs, FUNCTOR_dot2)) {
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Py_ssize_t left, right;
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if (!PL_get_arg(1, trhs, targ))
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return -1;
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left = get_p_int(term_to_python(targ, true), 0);
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if (!PL_get_arg(2, trhs, targ))
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return -1;
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right = get_p_int(term_to_python(targ, true), PyObject_Size(lhs));
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if (!PySequence_Check(lhs))
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return -1;
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PL_reset_term_refs(targ);
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return PySequence_SetSlice(lhs, left, right, e);
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} else {
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rhs = term_to_python(trhs, true);
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PL_reset_term_refs(targ);
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return PyObject_SetItem(lhs, rhs, e);
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}
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}
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}
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}
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return -1;
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}
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foreign_t assign_to_symbol(term_t t, PyObject *e) {
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char *s;
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PyErr_Clear();
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if (!PL_get_atom_chars(t, &s)) {
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wchar_t *w;
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atom_t at;
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size_t len;
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PyObject *attr;
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if (!PL_get_atom(t, &at)) {
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return false;
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}
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if (!(w = PL_atom_wchars(at, &len)))
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return false;
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attr = PyUnicode_FromWideChar(w, wcslen(w));
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if (attr) {
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return PyObject_SetAttr(py_Main, attr, e) >= 0;
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} else {
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PyErr_Print();
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return false;
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}
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} else if (proper_ascii_string(s)) {
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return PyObject_SetAttrString(py_Main, s, e) >= 0;
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} else {
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PyObject *attr = PyUnicode_DecodeLatin1(s, strlen(s), NULL);
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if (!attr)
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return -1;
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return PyObject_SetAttr(py_Main, attr, e) >= 0;
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}
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}
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foreign_t python_to_ptr(PyObject *pVal, term_t t) {
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Py_IncRef(pVal);
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return address_to_term(pVal, t);
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}
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foreign_t python_to_term(PyObject *pVal, term_t t) {
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if (pVal == Py_None) {
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return PL_unify_atom(t, ATOM_none);
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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);
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} else {
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return PL_unify_atom(t, ATOM_false);
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}
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} else if (PyLong_Check(pVal)) {
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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)) {
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return PL_unify_int64(t, PyInt_AsLong(pVal));
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#endif
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} else if (PyFloat_Check(pVal)) {
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return PL_unify_float(t, PyFloat_AsDouble(pVal));
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} else if (PyComplex_Check(pVal)) {
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bool rc;
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term_t to = PL_new_term_ref(), t1 = PL_new_term_ref(),
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t2 = PL_new_term_ref();
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if (!PL_put_float(t1, PyComplex_RealAsDouble(pVal)) ||
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!PL_put_float(t2, PyComplex_ImagAsDouble(pVal)) ||
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!PL_cons_functor(to, FUNCTOR_complex2, t1, t2)) {
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rc = FALSE;
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} else {
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rc = PL_unify(t, to);
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}
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PL_reset_term_refs(to);
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return rc;
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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
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Py_ssize_t sz = PyUnicode_GetSize(pVal) + 1;
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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
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Py_ssize_t sz = PyUnicode_GetLength(pVal) + 1;
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wchar_t *ptr = malloc(sizeof(wchar_t) * sz);
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sz = PyUnicode_AsWideChar(pVal, ptr, sz);
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#endif
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tmp_atom = PL_new_atom_wchars(sz, ptr);
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free(ptr);
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return PL_unify_atom(t, tmp_atom);
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} else if (PyByteArray_Check(pVal)) {
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atom_t tmp_atom = PL_new_atom(PyByteArray_AsString(pVal));
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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)) {
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atom_t tmp_atom = PL_new_atom(PyString_AsString(pVal));
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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);
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functor_t f;
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const char *s;
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if ((s = (Py_TYPE(pVal)->tp_name)))
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f = PL_new_functor(PL_new_atom(s), sz);
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else
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f = PL_new_functor(ATOM_t, sz);
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if (!PL_unify_functor(t, f))
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return FALSE;
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for (i = 0; i < sz; i++) {
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term_t to = PL_new_term_ref();
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if (!PL_unify_arg(i + 1, t, to))
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return FALSE;
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if (!python_to_term(PyTuple_GetItem(pVal, i), to))
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return FALSE;
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}
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return TRUE;
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} else if (PyList_Check(pVal)) {
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term_t to = PL_new_term_ref();
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Py_ssize_t i, sz = PyList_GET_SIZE(pVal);
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for (i = 0; i < sz; i++) {
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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;
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}
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return PL_unify_nil(t);
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} else if (PyDict_Check(pVal)) {
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Py_ssize_t pos = 0;
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term_t to = PL_new_term_ref(), ti = to;
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int left = PyDict_Size(pVal);
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PyObject *key, *value;
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while (PyDict_Next(pVal, &pos, &key, &value)) {
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term_t tkey = PL_new_term_ref(), tval = PL_new_term_ref(), tint,
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tnew = PL_new_term_ref();
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/* do something interesting with the values... */
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if (!python_to_term(key, tkey)) {
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return FALSE;
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}
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if (!python_to_term(value, tval)) {
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return FALSE;
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}
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/* reuse */
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tint = tkey;
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if (!PL_cons_functor(tint, FUNCTOR_colon2, tkey, tval)) {
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return FALSE;
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}
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if (--left) {
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if (!PL_cons_functor(tint, FUNCTOR_comma2, tint, tnew))
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return FALSE;
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}
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if (!PL_unify(ti, tint))
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return FALSE;
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ti = tnew;
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}
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PL_cons_functor(to, FUNCTOR_curly1, to);
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return PL_unify(t, to);
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} else {
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PyObject *pValR = PyObject_Repr(pVal);
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if (pValR == NULL)
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return address_to_term(pVal, t);
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Py_ssize_t sz = PyUnicode_GetSize(pValR) + 1;
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#if PY_MAJOR_VERSION < 3
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char *s = malloc(sizeof(char) * sz);
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PyObject *us = PyUnicode_EncodeUTF8((const Py_UNICODE *)pValR, sz, NULL);
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PyString_AsStringAndSize(us, &s, &sz);
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foreign_t rc = repr_term(s, sz, t);
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free((void *)s);
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return rc;
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#else
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// new interface
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char *s = PyUnicode_AsUTF8AndSize(pVal, &sz);
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return repr_term(s, sz, t);
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#endif
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}
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}
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X_API YAP_Term pythonToYAP(PyObject *pVal) {
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term_t t = PL_new_term_ref();
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if (!python_to_term(pVal, t))
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return 0;
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YAP_Term tt = YAP_GetFromSlot(t);
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YAP_RecoverSlots(1, t);
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return tt;
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}
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