363 lines
10 KiB
C
363 lines
10 KiB
C
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#include "py4yap.h"
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#include <frameobject.h>
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void YAPPy_ThrowError__(const char *file, const char *function, int lineno,
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yap_error_number type, term_t where, ...) {
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va_list ap;
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char tmpbuf[MAXPATHLEN];
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YAP_Term wheret = YAP_GetFromSlot(where);
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PyObject *ptype;
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if ((ptype = PyErr_Occurred()) == NULL) {
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PyErr_Print();
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}
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va_start(ap, where);
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char *format = va_arg(ap, char *);
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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: ");
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Yap_ThrowError__(file, function, lineno, type, wheret, tmpbuf);
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} else {
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Yap_ThrowError__(file, function, lineno, type, wheret);
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}
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}
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static foreign_t repr_term(PyObject *pVal, 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_pointer(t1, pVal);
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PL_cons_functor(to, FUNCTOR_pointer1, t1);
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Py_INCREF(pVal);
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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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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;
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if (!lookupPySymbol(s, NULL, &dic))
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dic = py_Main;
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return PyObject_SetAttrString(dic, s, e) == 0;
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}
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foreign_t python_to_term(PyObject *pVal, term_t t) {
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bool rc = true;
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term_t to = PL_new_term_ref();
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// fputs(" <<*** ",stderr); PyObject_Print(pVal,stderr,0);
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// fputs("<<***\n",stderr);
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if (pVal == Py_None) {
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// fputs("<<*** ",stderr);Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
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// >>***\n",stderr);
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rc = PL_unify_atom(t, ATOM_none);
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// fputs("<<*** ",stderr);Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
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// >>***\n",stderr);
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} else if (PyBool_Check(pVal)) {
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rc = rc && PL_unify_bool(t, PyObject_IsTrue(pVal));
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} else if (PyLong_Check(pVal)) {
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rc = rc && 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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rc = rc && 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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rc = rc && PL_unify_float(t, PyFloat_AsDouble(pVal));
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} else if (PyComplex_Check(pVal)) {
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term_t t1 = PL_new_term_ref(), 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 = rc && PL_unify(t, to);
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}
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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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size_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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tmp_atom = PL_new_atom_wchars(sz, ptr);
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free(ptr);
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#else
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const char *s = PyUnicode_AsUTF8(pVal);
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tmp_atom = PL_new_atom(s);
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#endif
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rc = rc && 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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rc = rc && 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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rc = rc && 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 (sz == 0) {
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rc = rc && PL_unify_atom(t, ATOM_brackets);
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} else {
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if ((s = (Py_TYPE(pVal)->tp_name))) {
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if (!strcmp(s, "v")) {
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pVal = PyTuple_GetItem(pVal, 0);
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if (pVal == NULL) {
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pVal = Py_None;
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PyErr_Clear();
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}
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term_t v = YAP_InitSlot(PyLong_AsLong(pVal));
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return PL_unify(v, t);
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}
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if (s[0] == '$') {
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char *ns = malloc(strlen(s) + 5);
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strcpy(ns, "__");
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strcat(ns, s + 1);
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strcat(ns, "__");
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f = PL_new_functor(PL_new_atom(ns), sz);
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} else {
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f = PL_new_functor(PL_new_atom(s), sz);
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}
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} else {
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f = PL_new_functor(ATOM_t, sz);
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}
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if (PL_unify_functor(t, f)) {
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for (i = 0; i < sz; i++) {
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if (!PL_get_arg(i + 1, t, to))
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rc = false;
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PyObject *p = PyTuple_GetItem(pVal, i);
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if (p == NULL) {
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PyErr_Clear();
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p = Py_None;
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}
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rc = rc && python_to_term(p, to);
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}
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} else {
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rc = false;
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}
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// fputs(" ||*** ",stderr); Yap_DebugPlWrite(YAP_GetFromSlot(t)); fputs("
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// ||***\n",stderr);
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}
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} else if (PyList_Check(pVal)) {
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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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PyObject *obj;
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rc = rc && PL_unify_list(t, to, t);
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if ((obj = PyList_GetItem(pVal, i - 1)) == NULL) {
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obj = Py_None;
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}
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rc = rc && python_to_term(obj, to);
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if (!rc)
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return false;
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}
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return rc && PL_unify_nil(t);
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// fputs("[***] ", stderr);
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// Yap_DebugPlWrite(yt); fputs("[***]\n", stderr);
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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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if (left == 0) {
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rc = rc && PL_unify_atom(t, ATOM_curly_brackets);
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} else {
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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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continue;
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}
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if (!python_to_term(value, tval)) {
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continue;
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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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rc = false;
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continue;
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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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PL_reset_term_refs(tkey);
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rc = false;
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}
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if (!PL_unify(ti, tint)) {
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rc = false;
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}
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ti = tnew;
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PL_reset_term_refs(tkey);
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}
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rc = rc && PL_unify(t, to);
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}
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} else {
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rc = rc && repr_term(pVal, t);
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}
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PL_reset_term_refs(to);
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return rc;
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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 (pVal == NULL || !python_to_term(pVal, t)) {
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PL_reset_term_refs(t);
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return 0;
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}
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YAP_Term tt = YAP_GetFromSlot(t);
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PL_reset_term_refs(t);
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Py_DECREF(pVal);
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return tt;
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}
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PyObject *py_Local, *py_Global;
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/**
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* 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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bool python_assign(term_t t, PyObject *exp, PyObject *context) {
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context = find_obj(context, t, false);
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// Yap_DebugPlWriteln(yt);
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switch (PL_term_type(t)) {
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case PL_VARIABLE: {
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if (context == NULL) // prevent a.V= N*N[N-1]
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return python_to_term(exp, t);
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}
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case PL_ATOM: {
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char *s = NULL;
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PL_get_atom_chars(t, &s);
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if (!context)
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context = py_Main;
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if (PyObject_SetAttrString(context, s, exp) == 0)
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return true;
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PyErr_Print();
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return false;
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}
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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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// domain or type erro?
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return false;
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default: {
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term_t tail = PL_new_term_ref(), arg = PL_new_term_ref();
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size_t len, i;
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if (PL_is_pair(t)) {
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if (PL_skip_list(t, tail, &len) &&
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PL_get_nil(tail)) { // true list
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bool o = true;
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if (PySequence_Check(exp) && PySequence_Length(exp) == len)
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for (i = 0; i < len; i++) {
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PyObject *p;
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if (!PL_get_list(t, arg, t)) {
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PL_reset_term_refs(tail);
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o = false;
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p = Py_None;
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}
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if ((p = PySequence_GetItem(exp, i)) == NULL)
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p = Py_None;
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if (!python_assign(arg, p, context)) {
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PL_reset_term_refs(tail);
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o = false;
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}
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}
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}
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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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PL_reset_term_refs(tail);
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return false;
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}
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if (fun == FUNCTOR_sqbrackets2) {
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// tail is the object o
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if (!PL_get_arg(2, t, tail)) {
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PL_reset_term_refs(tail);
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return false;
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}
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PyObject *o = term_to_python(tail, true, context, false);
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// t now refers to the index
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if (!PL_get_arg(1, t, t) || !PL_get_list(t, t, tail) ||
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!PL_get_nil(tail)) {
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PL_reset_term_refs(tail);
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return false;
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}
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PyObject *i = term_to_python(t, true, NULL, false);
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// check numeric
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if (PySequence_Check(o) && PyLong_Check(i)) {
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long int j;
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j = PyLong_AsLong(i);
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return PySequence_SetItem(o, j, exp) == 0;
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}
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#if PY_MAJOR_VERSION < 3
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if (PySequence_Check(o) && PyInt_Check(i)) {
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long int j;
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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) {
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return true;
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}
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} else {
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atom_t s;
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int n, i;
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PL_get_name_arity(t, &s, &n);
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PyObject *o = term_to_python(t, true, context, true);
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if (PySequence_Check(o) && PySequence_Length(o) == n) {
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for (i = 1; i <= n; i++) {
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PyObject *p;
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if (!PL_get_arg(i, t, arg)) {
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PL_reset_term_refs(tail);
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o = false;
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p = Py_None;
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}
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if ((p = PySequence_GetItem(exp, i - 1)) == NULL)
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p = Py_None;
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else if (!python_assign(arg, p, NULL)) {
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PL_reset_term_refs(tail);
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o = NULL;
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}
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}
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return true;
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}
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}
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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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}
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}
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