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c2ebd2857c
yap-6.3/packages/python/pybips.c
Vitor Santos Costa 31423fcf90 yapi
2018-12-21 20:57:53 +00:00

1157 lines
29 KiB
C
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/**
*
* @defgroup Py4YAP-Bips Python Built-Ins
* @ingroup Py4YAP
*
* The Python engine includes a large number of Python built-ins. Some
* of them are interfaced here.
*/
//@{
#include "py4yap.h"
static PyObject *finalLookup(PyObject *i, const char *s) {
PyObject *os = PyUnicode_FromString(s), *rc = NULL;
if (i == NULL)
return NULL;
if (strcmp(s, "none") == 0)
return Py_None;
if (PyModule_Check(i)) {
i = PyModule_GetDict(i);
}
if (PyDict_Check(i))
{
if (PyDict_Contains(i, os) == 1) {
rc = PyDict_GetItem(i, os);
}
}
if (!rc && PyObject_HasAttr(i, os)) {
rc = PyObject_GetAttr(i, os);
}
if (rc)
{
Py_IncRef(rc);
return rc;
}
return NULL;
}
PyObject *PythonLookupSpecial(const char *s) {
if (s == NULL)
return NULL;
if (strcmp(s, "true") == 0) {
return Py_True;
}
if (strcmp(s, "false") == 0) {
return Py_False;
}
if (strcmp(s, "[]") == 0) {
return PyList_New(0);
}
if (strcmp(s, "{}") == 0) {
return PyDict_New();
/* return __main__,s */
}
return NULL;
}
static PyObject *builtin(const char *sp) {
return PyDict_GetItemString(py_Builtin, sp);
}
PyObject *lookupPySymbol(const char *sp, PyObject *pContext, PyObject **duc) {
PyObject *out = NULL;
if (!sp)
return NULL;
if ((out = finalLookup(pContext, sp))) {
return out;
}
if ((out = finalLookup(py_Context, sp))) {
return out;
}
if ((out = finalLookup(py_Builtin, sp))) {
return out;
}
if ((out = finalLookup(py_Atoms, sp)))
{
return out;
}
if ((out = finalLookup(py_Local, sp)) && out != Py_None) {
return out;
}
if ((out = finalLookup(py_Global, sp))) {
return out;
}
if ((out = finalLookup(py_ModDict, sp))) {
return out;
}
if ((out = finalLookup(py_Main, sp))) {
return out;
}
return NULL;
}
PyObject *PythonLookup(const char *s, PyObject *oo) {
PyObject *o;
if ((o = PythonLookupSpecial(s)))
return o;
if ((o = lookupPySymbol(s, oo, NULL)) == NULL)
return NULL;
else {
Py_INCREF(o);
return o;
}
}
PyObject *
find_obj(PyObject *ob, term_t l, bool eval) {
YAP_Term hd, yt;
py_Context = NULL;
yt = YAP_GetFromSlot(l);
// Yap_DebugPlWriteln(yt);
while (YAP_IsPairTerm(yt)) {
hd = YAP_HeadOfTerm(yt);
yt = YAP_TailOfTerm(yt);
YAP_PutInSlot(l, yt);
ob = yap_to_python(hd, true, ob, false);
if (!ob) {
return Py_None;
}
}
return ob;
}
PyObject *find_term_obj(PyObject *ob, YAP_Term *yt, bool eval) {
YAP_Term hd;
py_Context = NULL;
// Yap_DebugPlWriteln(yt);
while (YAP_IsPairTerm(*yt)) {
hd = YAP_HeadOfTerm(*yt);
*yt = YAP_TailOfTerm(*yt);
ob = yap_to_python(hd, true, ob, false);
if (!ob) {
return Py_None;
}
}
return ob;
}
/**
* Python abs
*
* @param t Prolog term with a number
*
* @return a Python object with the number's absolute value
*/
static PyObject *bip_abs(term_t t) {
PyObject *pVal, *nVal;
AOK(PL_get_arg(1, t, t), NULL);
pVal = term_to_python(t, true, NULL, true);
pVal = CHECKNULL(t, pVal);
nVal = PyNumber_Absolute(pVal);
Py_DecRef(pVal);
return nVal;
}
/**
* Python all
*
* @param t Prolog term with a previously constructed Python iterator
> *
* @return the Python boolean `True` if all elements of the iterator are `True`,
* `False` otherwise.
*/
static PyObject *bip_all(term_t t) {
PyObject *it, *item, *v;
PyObject *(*iternext)(PyObject *);
int cmp;
AOK(PL_get_arg(1, t, t), NULL);
(v = term_to_python(t, true, NULL, true));
v = CHECKNULL(t, v);
it = PyObject_GetIter(v);
if (CHECKNULL(t, it) == NULL)
return Py_None;
iternext = *Py_TYPE(it)->tp_iternext;
if (PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_StopIteration))
PyErr_Clear();
else
return Py_None;
}
// PyObject_Print(v, stderr, 0);
for (;;) {
item = iternext(it);
if (CHECKNULL(t, item) == NULL)
break;
cmp = PyObject_IsTrue(item);
Py_DECREF(item);
if (cmp < 0) {
Py_DECREF(it);
return Py_None;
}
if (cmp == 0) {
Py_DECREF(it);
return Py_False;
}
}
Py_DECREF(it);
return Py_True;
}
/**
* Python any
*
* @param t Prolog term with a previously constructed Python iterator
*
* @return the Python boolean `True` if any element of the iterator is `True`,
* `False` if all of them are false.
*/
static PyObject *bip_any(term_t t) {
PyObject *it, *item, *v;
PyObject *(*iternext)(PyObject *);
int cmp;
AOK(PL_get_arg(1, t, t), NULL);
v = term_to_python(t, true, NULL, true);
it = PyObject_GetIter(v);
if (CHECKNULL(t, it) == NULL)
return Py_None;
iternext = *Py_TYPE(it)->tp_iternext;
for (;;) {
item = iternext(it);
if (CHECKNULL(t, item) == NULL)
break;
cmp = PyObject_IsTrue(item);
Py_DECREF(item);
if (cmp < 0) {
Py_DECREF(it);
return Py_None;
}
if (cmp == 1) {
Py_DECREF(it);
Py_RETURN_TRUE;
}
}
Py_DECREF(it);
if (PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_StopIteration))
PyErr_Clear();
else
return CHECKNULL(t, NULL);
}
Py_RETURN_FALSE;
}
static PyObject *bip_bin(term_t t) {
PyObject *v;
AOK(PL_get_arg(1, t, t), NULL);
v = term_to_python(t, true, NULL, true);
return PyNumber_ToBase(v, 2);
}
static PyObject *bip_float(term_t t, bool eval) {
PyObject *pVal, *o;
AOK(PL_get_arg(1, t, t), NULL);
pVal = term_to_python(t, eval, NULL, eval);
if (PyLong_Check(pVal)) {
o = PyFloat_FromDouble(PyLong_AsLong(pVal));
#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(pVal)) {
o = PyFloat_FromDouble(PyInt_AsLong(pVal));
#endif
} else if (PyFloat_Check(pVal)) {
return pVal;
} else
return Py_None;
Py_DECREF(pVal);
return o;
}
static PyObject *bip_int(term_t t) {
PyObject *pVal, *o;
AOK(PL_get_arg(1, t, t), NULL);
pVal = term_to_python(t, true, NULL, true);
#if PY_MAJOR_VERSION < 3
if (PyLong_Check(pVal)) {
o = PyInt_FromLong(PyLong_AsLong(pVal));
} else if (PyInt_Check(pVal)) {
return pVal;
#else
if (PyLong_Check(pVal)) {
return pVal;
#endif
} else if (PyFloat_Check(pVal)) {
#if PY_MAJOR_VERSION < 3
o = PyInt_FromLong(PyFloat_AsDouble(pVal));
#else
o = PyLong_FromDouble(PyFloat_AsDouble(pVal));
#endif
} else
return Py_None;
Py_DECREF(pVal);
return o;
}
static PyObject *bip_long(term_t t) {
PyObject *pVal, *o;
AOK(PL_get_arg(1, t, t), NULL);
pVal = term_to_python(t, true, NULL, true);
if (PyLong_Check(pVal)) {
return pVal;
#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(pVal)) {
o = PyLong_FromLong(PyInt_AsLong(pVal));
#endif
} else if (PyFloat_Check(pVal)) {
o = pVal;
} else
return Py_None;
Py_DECREF(pVal);
return o;
}
static PyObject *bip_iter(term_t t) {
PyObject *v;
AOK(PL_get_arg(1, t, t), NULL);
v = term_to_python(t, true, NULL, true);
return PyObject_GetIter(v);
}
static PyObject *bip_ord(term_t t) {
PyObject *pVal;
Py_ssize_t size;
AOK(PL_get_arg(1, t, t), NULL);
pVal = term_to_python(t, true, NULL, true);
if (PyUnicode_Check(pVal)) {
#if PY_MAJOR_VERSION < 3
size = PyUnicode_GET_SIZE(pVal);
#else
size = PyUnicode_GetLength(pVal);
#endif
if (size == 1) {
#if PY_MAJOR_VERSION < 3
long ord = (long)*PyUnicode_AS_UNICODE(pVal);
return PyInt_FromLong(ord);
#else
Py_UCS4 ord = PyUnicode_ReadChar(pVal, 0);
return PyLong_FromLong(ord);
#endif
}
return Py_None;
} else if (PyByteArray_Check(pVal)) {
char *s = PyByteArray_AsString(pVal);
if (s[1])
return Py_None;
#if PY_MAJOR_VERSION < 3
return PyInt_FromLong(s[0]);
} else if (PyString_Check(pVal)) {
char *s = PyString_AsString(pVal);
if (s[1])
return Py_None;
return PyInt_FromLong(s[0]);
#else
return PyLong_FromLong(s[0]);
#endif
} else
return NULL;
}
static PyObject *bip_sum(term_t t) {
PyObject *seq;
PyObject *result = NULL;
PyObject *temp, *item, *iter;
AOK(PL_get_arg(1, t, t), NULL);
seq = term_to_python(t, true, NULL, true);
iter = PyObject_GetIter(seq);
if (iter == NULL)
return NULL;
if (result == NULL) {
#if PY_MAJOR_VERSION < 3
result = PyInt_FromLong(0);
#else
result = PyLong_FromLong(0);
#endif
if (result == NULL) {
Py_DECREF(iter);
return NULL;
}
} else {
#if PY_MAJOR_VERSION < 3
/* reject string values for 'start' parameter */
if (PyObject_TypeCheck(result, &PyBaseString_Type)) {
PyErr_SetString(PyExc_TypeError,
"sum() can't sum strings [use ''.join(seq) instead]");
Py_DECREF(iter);
return NULL;
}
Py_INCREF(result);
#endif
}
#ifndef SLOW_SUM
/* Fast addition by keeping temporary sums in C instead of new Python objects.
Assumes all inputs are the same type. If the assumption fails, default
to the more general routine.
*/
#if PY_MAJOR_VERSION < 3
if (PyInt_CheckExact(result)) {
long i_result = PyInt_AS_LONG(result);
#else
if (PyLong_CheckExact(result)) {
long i_result = PyLong_AS_LONG(result);
#endif
Py_DECREF(result);
result = NULL;
while (result == NULL) {
item = PyIter_Next(iter);
if (item == NULL) {
Py_DECREF(iter);
if (PyErr_Occurred())
return NULL;
#if PY_MAJOR_VERSION < 3
return PyInt_FromLong(i_result);
#else
return PyLong_FromLong(i_result);
#endif
}
#if PY_MAJOR_VERSION < 3
if (PyInt_CheckExact(item)) {
long b = PyInt_AS_LONG(item);
#else
if (PyLong_CheckExact(item)) {
long b = PyLong_AS_LONG(item);
#endif
long x = i_result + b;
if ((x ^ i_result) >= 0 || (x ^ b) >= 0) {
i_result = x;
Py_DECREF(item);
continue;
}
}
/* Either overflowed or is not an int. Restore real objects and process normally
*/
#if PY_MAJOR_VERSION < 3
result = PyInt_FromLong(i_result);
#else
result = PyLong_FromLong(i_result);
#endif
temp = PyNumber_Add(result, item);
Py_DECREF(result);
Py_DECREF(item);
result = temp;
if (result == NULL) {
Py_DECREF(iter);
return NULL;
}
}
}
if (PyFloat_CheckExact(result)) {
double f_result = PyFloat_AS_DOUBLE(result);
Py_DECREF(result);
result = NULL;
while (result == NULL) {
item = PyIter_Next(iter);
if (item == NULL) {
Py_DECREF(iter);
if (PyErr_Occurred())
return NULL;
return PyFloat_FromDouble(f_result);
}
if (PyFloat_CheckExact(item)) {
PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
f_result += PyFloat_AS_DOUBLE(item);
PyFPE_END_PROTECT(f_result) Py_DECREF(item);
continue;
}
#if PY_MAJOR_VERSION < 3
if (PyInt_CheckExact(item)) {
PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter);
return 0)f_result += (double)PyInt_AS_LONG(item);
PyFPE_END_PROTECT(f_result) Py_DECREF(item);
continue;
}
#else
if (PyLong_CheckExact(item)) {
PyFPE_START_PROTECT("add", Py_DECREF(item); Py_DECREF(iter); return 0)
f_result += PyLong_AsDouble(item);
PyFPE_END_PROTECT(f_result) Py_DECREF(item);
continue;
}
#endif
result = PyFloat_FromDouble(f_result);
temp = PyNumber_Add(result, item);
Py_DECREF(result);
Py_DECREF(item);
result = temp;
if (result == NULL) {
Py_DECREF(iter);
return NULL;
}
}
#endif
}
for (;;) {
item = PyIter_Next(iter);
if (item == NULL) {
/* error, or end-of-sequence */
if (PyErr_Occurred()) {
Py_DECREF(result);
result = NULL;
}
break;
}
/* It's tempting to use PyNumber_InPlaceAdd instead of
PyNumber_Add here, to avoid quadratic running time
when doing 'sum(list_of_lists, [])'. However, this
would produce a change in behaviour: a snippet like
empty = []
sum([[x] for x in range(10)], empty)
would change the value of empty. */
temp = PyNumber_Add(result, item);
Py_DECREF(result);
Py_DECREF(item);
result = temp;
if (result == NULL)
break;
}
Py_DECREF(iter);
return result;
}
//@}
static long get_int(term_t arg, bool eval) {
long low;
if (!PL_get_long(arg, &low)) {
PyObject *low = term_to_python(arg, eval, NULL, eval);
if (PyLong_Check(low)) {
return PyLong_AsLong(low);
#if PY_MAJOR_VERSION < 3
} else if (PyInt_Check(low)) {
return PyInt_AsLong(low);
#endif
} else {
return 0;
}
}
return low;
}
/* 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;
}
#if PY_MAJOR_VERSION >= 3
static PyStructSequence_Field pnull[] = {
{"A1", NULL}, {"A2", NULL}, {"A3", NULL}, {"A4", NULL}, {"A5", NULL},
{"A6", NULL}, {"A7", NULL}, {"A8", NULL}, {"A9", NULL}, {"A9", NULL},
{"A10", NULL}, {"A11", NULL}, {"A12", NULL}, {"A13", NULL}, {"A14", NULL},
{"A15", NULL}, {"A16", NULL}, {"A17", NULL}, {"A18", NULL}, {"A19", NULL},
{"A19", NULL}, {"A20", NULL}, {"A21", NULL}, {"A22", NULL}, {"A23", NULL},
{"A24", NULL}, {"A25", NULL}, {"A26", NULL}, {"A27", NULL}, {"A28", NULL},
{"A29", NULL}, {"A29", NULL}, {"A30", NULL}, {"A31", NULL}, {"A32", NULL},
{NULL, NULL}};
static PyObject *structseq_str(PyStructSequence *obj ) {
/* buffer and type size were chosen well considered. */
#define REPR_BUFFER_SIZE 512
#define TYPE_MAXSIZE 100
bool removelast = false;
PyTypeObject *typ = Py_TYPE(obj);
const char *type_name = typ->tp_name;
Py_ssize_t len, i;
char buf[REPR_BUFFER_SIZE];
char *endofbuf, *pbuf = buf;
/* pointer to end of writeable buffer; safes space for "...)\0" */
endofbuf = &buf[REPR_BUFFER_SIZE - 5];
/* "typename(", limited to TYPE_MAXSIZE */
len =
strnlen(type_name, TYPE_MAXSIZE);
strncpy(pbuf, type_name, len);
pbuf += len;
*pbuf++ = '(';
for (i = 0; i < ((PyStructSequence *)obj)->ob_base.ob_size; i++) {
PyObject *val, *repr;
const char *crepr;
val = PyStructSequence_GET_ITEM(obj, i);
repr = PyObject_Str(val);
if (repr == NULL)
return Py_None;
crepr = PyUnicode_AsUTF8(repr);
if (crepr == NULL) {
Py_DECREF(repr);
return Py_None;
}
/* + 3: keep space for ", " */
len = strlen(crepr) + 2;
if ((pbuf + len) <= endofbuf) {
strcpy(pbuf, crepr);
pbuf += strlen(crepr);
*pbuf++ = ',';
*pbuf++ = ' ';
removelast = 1;
Py_DECREF(repr);
} else {
strcpy(pbuf, "...");
pbuf += 3;
removelast = 0;
Py_DECREF(repr);
break;
}
}
if (removelast) {
/* overwrite last ", " */
pbuf -= 2;
}
*pbuf++ = ')';
*pbuf = '\0';
return PyUnicode_FromString(buf);
}
static PyObject *structseq_repr(PyObject *iobj) {
/* buffer and type size were chosen well considered. */
#define REPR_BUFFER_SIZE 512
#define TYPE_MAXSIZE 100
PyStructSequence *obj = (PyStructSequence *)iobj;
PyTypeObject *typ = Py_TYPE(obj);
const char *type_name = typ->tp_name;
bool removelast = false;
Py_ssize_t len, i;
char buf[REPR_BUFFER_SIZE];
char *endofbuf, *pbuf = buf;
/* pointer to end of writeable buffer; safes space for "...)\0" */
endofbuf = &buf[REPR_BUFFER_SIZE - 5];
/* "typename(", limited to TYPE_MAXSIZE */
len =
strnlen(type_name, TYPE_MAXSIZE);
strncpy(pbuf, type_name, len);
pbuf += len;
*pbuf++ = '(';
for (i = 0; i < ((PyStructSequence *)obj)->ob_base.ob_size; i++) {
PyObject *val, *repr;
const char *crepr;
val = PyStructSequence_GET_ITEM(obj, i);
repr = PyObject_Repr(val);
if (repr == NULL)
return NULL;
crepr = PyUnicode_AsUTF8(repr);
if (crepr == NULL) {
Py_DECREF(repr);
return NULL;
}
/* + 3: keep space for ", " */
len = strlen(crepr) + 2;
if ((pbuf + len) <= endofbuf) {
strcpy(pbuf, crepr);
pbuf += strlen(crepr);
*pbuf++ = ',';
*pbuf++ = ' ';
removelast = 1;
Py_DECREF(repr);
} else {
strcpy(pbuf, "...");
pbuf += 3;
removelast = 0;
Py_DECREF(repr);
break;
}
}
if (removelast) {
/* overwrite last ", " */
pbuf -= 2;
}
*pbuf++ = ')';
*pbuf = '\0';
return PyUnicode_FromString(buf);
}
#endif
static bool legal_symbol(const char *s) {
int ch;
while (((ch = *s++) != '\0')) {
if (isalnum(ch) || ch == '_')
continue;
return false;
}
return true;
}
PyObject *term_to_nametuple(const char *s, arity_t arity, PyObject *tuple) {
PyTypeObject *typp;
PyObject *key = PyUnicode_FromString(s), *d;
if (legal_symbol(s)) {
if (!Py_f2p) {
PyObject *o1;
o1 = PyTuple_New(2);
PyTuple_SET_ITEM(o1, 0, PyUnicode_FromString(s));
PyTuple_SET_ITEM(o1, 1, tuple);
return o1;
}
size_t l = 0;
if ((l = PyList_Size(Py_f2p)) < arity) {
for (; l < arity; l++) {
PyList_Append(Py_f2p, PyDict_New());
}
}
if ((d = PyList_GetItem(Py_f2p, arity - 1)) && PyDict_Contains(d, key)) {
typp = (PyTypeObject *)d;
} else {
PyStructSequence_Desc *desc = PyMem_Calloc(sizeof(PyStructSequence_Desc), 1);
desc->name = PyMem_Malloc(strlen(s) + 1);
strcpy(desc->name, s);
desc->doc = "YAPTerm";
desc->fields = pnull;
desc->n_in_sequence = arity;
typp = PyStructSequence_NewType(desc);
typp->tp_name = desc->name;
if (PyStructSequence_InitType2(typp, desc) < 0)
return NULL;
typp->tp_traverse = NULL;
typp->tp_flags |=
Py_TPFLAGS_TUPLE_SUBCLASS|
Py_TPFLAGS_BASETYPE|
Py_TPFLAGS_HEAPTYPE;
// don't do this: we cannot add a type as an atribute.
// PyModule_AddGObject(py_Main, s, (PyObject *)typp);
if (d && !PyDict_Contains(d, key)) {
PyDict_SetItem(d, key, (void*)typp);
Py_INCREF(key);
Py_INCREF(typp);
}
typp->tp_repr = structseq_repr;
typp->tp_str = structseq_str;
}
PyObject *o = PyStructSequence_New(typp);
Py_INCREF(typp);
arity_t i;
for (i = 0; i < arity; i++) {
PyObject *pArg = PyTuple_GET_ITEM(tuple, i);
if (pArg) {
Py_INCREF(pArg);
PyStructSequence_SET_ITEM(o, i, pArg);
}
// PyObject_Print(pArg,stderr,0);fputc('\n',stderr);
}
//((PyStructSequence *)o)->ob_base.ob_size = arity;
// PyObject_Print(o,stderr,0);fputc('\n',stderr);
Py_INCREF(o);
return o;
}
return NULL;
}
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;
AOK(PL_get_arg(1, t, arg), NULL);
ilow = get_int(arg, true);
if (arity == 1) {
ihigh = ilow;
ilow = 0;
} else {
AOK(PL_get_arg(2, t, arg), NULL);
ihigh = get_int(arg, true);
if (arity == 3) {
AOK(PL_get_arg(3, t, arg), NULL);
istep = get_int(arg, true);
}
}
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;
AOK(((bign >= 0 && (long)n == bign) || "range() result has too many items"),
NULL);
v = PyList_New(n);
if (v == NULL)
return Py_None;
for (i = 0; i < n; i++) {
#if PY_MAJOR_VERSION < 3
PyObject *w = PyInt_FromLong(ilow);
#else
PyObject *w = PyLong_FromLong(ilow);
#endif
if (w == NULL) {
Py_DECREF(v);
return NULL;
}
PyList_SET_ITEM(v, i, w);
Py_INCREF(w);
ilow += istep;
}
return v;
}
PyObject *compound_to_pytree(term_t t, PyObject *context, bool cvt) {
PyObject *o = py_Main;
functor_t fun;
atom_t name;
int arity;
if (PL_is_variable(t)) {
return term_to_python(t, false, context, cvt);
}
o = find_obj(context, t, false);
AOK(PL_get_name_arity(t, &name, &arity), NULL);
if (arity == 0)
return term_to_python(t, false, o, false);
AOK(PL_get_functor(t, &fun), NULL);
if (!arity) {
char *s = NULL;
AOK(!PL_get_atom_chars(t, &s), NULL);
// this should never happen
return term_to_python(t, false, o, cvt);
} else {
const char *s;
if (!(s = PL_atom_chars(name))) {
return NULL;
}
Term tleft;
int i;
PyObject *out = PyTuple_New(arity);
if (CHECKNULL(t, out) == NULL) {
PyErr_Print();
return NULL;
}
//DebugPrintf("Tuple %s/%d = %p\n", name, arity, out);
for (i = 0; i < arity; i++) {
PyObject *pArg;
tleft = ArgOfTerm(i + 1, Yap_GetFromSlot(t));
pArg = yap_to_python(tleft, false, NULL, cvt);
if (pArg) {
/* pArg reference stolen here: */
PyTuple_SET_ITEM(out, i, pArg);
Py_INCREF(pArg);
}
}
PyObject *c = lookupPySymbol(s, out, NULL);
if (c && PyCallable_Check(c)) {
PyObject *n = PyTuple_New(arity);
PyTuple_SET_ITEM(n, 0, c);
PyTuple_SET_ITEM(n, 1, out);
return n;
}
return term_to_nametuple(s, arity, out);
}
}
PyObject *compound_to_pyeval(term_t t, PyObject *context, bool cvt) {
PyObject *o = NULL;
atom_t name;
int arity;
functor_t fun;
o = find_obj(context, t, true);
AOK(PL_get_name_arity(t, &name, &arity), NULL);
if (arity == 0) {
return term_to_python(t, true, o, cvt);
}
if (!PL_get_functor(t, &fun))
return NULL;
if (fun == FUNCTOR_abs1) {
return bip_abs(t);
} else if (fun == FUNCTOR_all1) {
return bip_all(t);
} else if (fun == FUNCTOR_any1) {
return bip_any(t);
} else if (fun == FUNCTOR_bin1) {
return bip_bin(t);
} else if (fun == FUNCTOR_ord1) {
return bip_ord(t);
} else if (fun == FUNCTOR_int1) {
return bip_int(t);
} else if (fun == FUNCTOR_long1) {
return bip_long(t);
} else if (fun == FUNCTOR_float1) {
return bip_float(t, true);
} 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);
}
if (fun == FUNCTOR_len1) {
term_t targ = PL_new_term_ref();
PyObject *ptr;
AOK(PL_get_arg(1, t, targ), NULL);
ptr = term_to_python(targ, true, NULL, true);
return PyLong_FromLong(PyObject_Length(ptr));
}
if (fun == FUNCTOR_div2) {
term_t targ = PL_new_term_ref();
PyObject *lhs, *rhs;
AOK(PL_get_arg(1, t, targ), NULL);
lhs = term_to_python(targ, true, NULL, false);
if (!PyNumber_Check(lhs))
return NULL;
AOK(PL_get_arg(2, t, targ), NULL);
rhs = term_to_python(targ, true, NULL, false);
if (!PyNumber_Check(rhs))
return NULL;
#if PY_MAJOR_VERSION < 3
return PyNumber_Divide(lhs, rhs);
#else
return PyNumber_TrueDivide(lhs, rhs);
#endif
}
if (fun == FUNCTOR_dir1) {
term_t targ = PL_new_term_ref();
PyObject *ptr;
AOK(PL_get_arg(1, t, targ), NULL);
ptr = term_to_python(targ, true, NULL, true);
if (!ptr) return NULL;
return PyObject_Dir(ptr);
{}
}
else if (fun == FUNCTOR_plus2) {
term_t targ = PL_new_term_ref();
PyObject *lhs, *rhs;
if (!PL_get_arg(1, t, targ))
return NULL;
// Yap_DebugPlWriteln(YAP_GetFromSlot(t));
lhs = term_to_python(targ, true, NULL, true);
AOK(PL_get_arg(2, t, targ), NULL);
rhs = term_to_python(targ, true, NULL, true);
if (PySequence_Check(lhs) && PySequence_Check(rhs)) {
return PySequence_Concat(lhs, rhs);
}
if (PyNumber_Check(lhs) && PyNumber_Check(rhs))
return PyNumber_Add(lhs, rhs);
return CALL_BIP2(builtin("+"), 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, true, NULL, true);
if (!PL_get_arg(2, t, targ))
return NULL;
rhs = term_to_python(targ, true, NULL, true);
if (PyNumber_Check(rhs) && PyNumber_Check(lhs))
return PyNumber_Subtract(lhs, rhs);
return CALL_BIP2(builtin("-"), lhs, rhs);
} else if (fun == FUNCTOR_mul2) {
term_t targ = PL_new_term_ref();
PyObject *lhs, *rhs;
AOK(PL_get_arg(1, t, targ), NULL);
/* YAP_DebugPlWriteln(YAP_GetTermSlot(arg)); */
(lhs = term_to_python(targ, true, NULL, true));
CHECKNULL(targ, lhs);
AOK(PL_get_arg(2, t, targ), NULL);
(rhs = term_to_python(targ, true, NULL, true));
CHECKNULL(targ, rhs);
if (PySequence_Check(lhs) && (
#if PY_MAJOR_VERSION < 3
PyInt_Check(rhs) ||
#endif
PyLong_Check(rhs))) {
return PySequence_Repeat(lhs, get_p_int(rhs, 0));
}
if (PyNumber_Check(lhs) && PyNumber_Check(rhs))
return PyNumber_Multiply(lhs, rhs);
return PyObject_CallFunctionObjArgs(builtin("*"), lhs, rhs);
}
if (!arity) {
char *s = NULL;
PyObject *pValue;
AOK(PL_get_atom_chars(t, &s), NULL);
PyObject_Print(o, stderr, 0);
pValue = PyObject_GetAttrString(o, s);
if (CHECKNULL(t, pValue) == NULL) {
PyErr_Print();
return NULL;
}
return pValue;
} else {
char *s = PL_atom_chars(name);
if (!strcmp(s,"t") || !strcmp(s,"tuple")) {
YAP_Term tt = YAP_GetFromSlot(t), tleft;
int i;
PyObject *rc = PyTuple_New(arity);
PyObject *pArg;
for (i=0;i<arity;i++) {
AOK((tleft = YAP_ArgOfTerm(i+1, tt)), NULL);
pArg = yap_to_python(tleft, true, NULL, true);
if (pArg == NULL) {
pArg = Py_None;
}
/* pArg reference stolen here: */
Py_INCREF(pArg);
PyTuple_SetItem(rc, i, pArg);
}
return rc;
}
PyObject *ys = lookupPySymbol(s, o, NULL), *pArgs;
int i;
term_t tleft = PL_new_term_ref();
bool indict = true;
PyObject *pyDict = PyDict_New();
pArgs = Py_None;
for (i = arity; i > 0; i--) {
PyObject *pArg;
AOK(PL_get_arg(i, t, tleft), NULL);
/* ignore (_) */
if (indict) {
if (PL_get_functor(tleft, &fun) && fun == FUNCTOR_equal2) {
Term tatt = ArgOfTerm(1,Yap_GetFromSlot(tleft));
const char *sk;
if (IsAtomTerm(tatt))
sk = RepAtom(AtomOfTerm(tatt))->StrOfAE;
else if (IsStringTerm(tatt))
sk = StringOfTerm(tatt);
else
return NULL;
PyObject *key = PyUnicode_FromString(sk);
AOK(PL_get_arg(2, tleft, tleft), NULL);
PyObject *val = term_to_python(tleft, true, o, cvt);
if (val == NULL)
return NULL;
PyDict_SetItem(pyDict, key, val);
} else {
indict = false;
pArgs = PyTuple_New(i);
}
}
// fprintf(stderr, "Tuple %p: %s\n", pyDict,
// PyUnicode_AsUTF8(PyObject_Str(pyDict)));
if (!indict) {
if (PL_is_variable(tleft)) {
pArg = Py_None;
} else {
pArg = term_to_python(tleft, true, o, cvt);
// PyObject_Print(pArg,fdopen(2,"w"),0);
if (pArg == NULL) {
pArg = Py_None;
}
/* pArg reference stolen here: */
Py_INCREF(pArg);
}
PyTuple_SetItem(pArgs, i - 1, pArg);
}
}
if (pArgs == Py_None) {
pArgs = PyTuple_New(0);
}
PyObject *rc;
if ( PyCallable_Check(ys)) {
//PyObject_Print(ys, stderr, 0);
// PyObject_Print(pArgs, stderr, 0);
// PyObject_Print(pyDict, stderr, 0);
// PyObject_Print(pArgs, stderr, 0);
// PyObject_Print(o, stderr, 0);
CHECK_CALL(ys, pArgs, pyDict);
Py_DECREF(pArgs);
Py_DECREF(ys);
// PyObject_Print(rc, stderr, 0);
// DebugPrintf("CallObject %p\n", rc);
} else {
rc = term_to_nametuple(s, arity, pArgs);
}
return rc;
}
}
// @}
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