C++ PyTuple_GET_ITEM函数代码示例

//.........这里部分代码省略.........
		     vp;
		     vp = pairnext(&cursor), i++) {
			PyObject *pPair;

			/* The inside tuple has two only: */
			if ((pPair = PyTuple_New(2)) == NULL) {
				ret = RLM_MODULE_FAIL;
				goto finish;
			}

			if (mod_populate_vptuple(pPair, vp) == 0) {
				/* Put the tuple inside the container */
				PyTuple_SET_ITEM(pArgs, i, pPair);
			} else {
				Py_INCREF(Py_None);
				PyTuple_SET_ITEM(pArgs, i, Py_None);
				Py_DECREF(pPair);
			}
		}
	}

	/* Call Python function. */
	pRet = PyObject_CallFunctionObjArgs(pFunc, pArgs, NULL);

	if (!pRet) {
		ret = RLM_MODULE_FAIL;
		goto finish;
	}

	if (!request)
		goto finish;

	/*
	 *	The function returns either:
	 *  1. (returnvalue, replyTuple, configTuple), where
	 *   - returnvalue is one of the constants RLM_*
	 *   - replyTuple and configTuple are tuples of string
	 *      tuples of size 2
	 *
	 *  2. the function return value alone
	 *
	 *  3. None - default return value is set
	 *
	 * xxx This code is messy!
	 */
	if (PyTuple_CheckExact(pRet)) {
		PyObject *pTupleInt;

		if (PyTuple_GET_SIZE(pRet) != 3) {
			ERROR("rlm_python:%s: tuple must be (return, replyTuple, configTuple)", funcname);
			ret = RLM_MODULE_FAIL;
			goto finish;
		}

		pTupleInt = PyTuple_GET_ITEM(pRet, 0);
		if (!PyInt_CheckExact(pTupleInt)) {
			ERROR("rlm_python:%s: first tuple element not an integer", funcname);
			ret = RLM_MODULE_FAIL;
			goto finish;
		}
		/* Now have the return value */
		ret = PyInt_AsLong(pTupleInt);
		/* Reply item tuple */
		mod_vptuple(request->reply, &request->reply->vps,
			    PyTuple_GET_ITEM(pRet, 1), funcname);
		/* Config item tuple */
		mod_vptuple(request, &request->config_items,
			    PyTuple_GET_ITEM(pRet, 2), funcname);

	} else if (PyInt_CheckExact(pRet)) {
		/* Just an integer */
		ret = PyInt_AsLong(pRet);

	} else if (pRet == Py_None) {
		/* returned 'None', return value defaults to "OK, continue." */
		ret = RLM_MODULE_OK;
	} else {
		/* Not tuple or None */
		ERROR("rlm_python:%s: function did not return a tuple or None", funcname);
		ret = RLM_MODULE_FAIL;
		goto finish;
	}

finish:
	if (pArgs) {
		Py_DECREF(pArgs);
	}
	if (pRet) {
		Py_DECREF(pRet);
	}

#ifdef HAVE_PTHREAD_H
	if (worker) {
		PyThreadState_Swap(prev_thread_state);
	}
	PyGILState_Release(gstate);
#endif

	return ret;
}

/**
 * _py_args_combine_and_check_length:
 * @cache: PyGICallableCache
 * @py_args: the tuple of positional arguments.
 * @py_kwargs: the dict of keyword arguments to be merged with py_args.
 *
 * Returns: New value reference to the combined py_args and py_kwargs.
 */
static PyObject *
_py_args_combine_and_check_length (PyGICallableCache *cache,
                                   PyObject    *py_args,
                                   PyObject    *py_kwargs)
{
    PyObject *combined_py_args = NULL;
    Py_ssize_t n_py_args, n_py_kwargs, i;
    guint n_expected_args = cache->n_py_args;
    GSList *l;

    n_py_args = PyTuple_GET_SIZE (py_args);
    if (py_kwargs == NULL)
        n_py_kwargs = 0;
    else
        n_py_kwargs = PyDict_Size (py_kwargs);

    /* Fast path, we already have the exact number of args and not kwargs. */
    if (n_py_kwargs == 0 && n_py_args == n_expected_args && cache->user_data_varargs_index < 0) {
        Py_INCREF (py_args);
        return py_args;
    }

    if (cache->user_data_varargs_index < 0 && n_expected_args < n_py_args) {
        char *full_name = pygi_callable_cache_get_full_name (cache);
        PyErr_Format (PyExc_TypeError,
                      "%.200s() takes exactly %d %sargument%s (%zd given)",
                      full_name,
                      n_expected_args,
                      n_py_kwargs > 0 ? "non-keyword " : "",
                      n_expected_args == 1 ? "" : "s",
                      n_py_args);
        g_free (full_name);
        return NULL;
    }

    if (cache->user_data_varargs_index >= 0 && n_py_kwargs > 0 && n_expected_args < n_py_args) {
        char *full_name = pygi_callable_cache_get_full_name (cache);
        PyErr_Format (PyExc_TypeError,
                      "%.200s() cannot use variable user data arguments with keyword arguments",
                      full_name);
        g_free (full_name);
        return NULL;
    }

    if (n_py_kwargs > 0 && !_check_for_unexpected_kwargs (cache,
                                                          cache->arg_name_hash,
                                                          py_kwargs)) {
        return NULL;
    }

    /* will hold arguments from both py_args and py_kwargs
     * when they are combined into a single tuple */
    combined_py_args = PyTuple_New (n_expected_args);

    for (i = 0, l = cache->arg_name_list; i < n_expected_args && l; i++, l = l->next) {
        PyObject *py_arg_item = NULL;
        PyObject *kw_arg_item = NULL;
        const gchar *arg_name = l->data;
        int arg_cache_index = -1;
        gboolean is_varargs_user_data = FALSE;

        if (arg_name != NULL)
            arg_cache_index = GPOINTER_TO_INT (g_hash_table_lookup (cache->arg_name_hash, arg_name));

        is_varargs_user_data = cache->user_data_varargs_index >= 0 &&
                                arg_cache_index == cache->user_data_varargs_index;

        if (n_py_kwargs > 0 && arg_name != NULL) {
            /* NULL means this argument has no keyword name */
            /* ex. the first argument to a method or constructor */
            kw_arg_item = PyDict_GetItemString (py_kwargs, arg_name);
        }

        /* use a bounded retrieval of the original input */
        if (i < n_py_args)
            py_arg_item = PyTuple_GET_ITEM (py_args, i);

        if (kw_arg_item == NULL && py_arg_item != NULL) {
            if (is_varargs_user_data) {
                /* For tail end user_data varargs, pull a slice off and we are done. */
                PyObject *user_data = PyTuple_GetSlice (py_args, i, PY_SSIZE_T_MAX);
                PyTuple_SET_ITEM (combined_py_args, i, user_data);
                return combined_py_args;
            } else {
                Py_INCREF (py_arg_item);
                PyTuple_SET_ITEM (combined_py_args, i, py_arg_item);
            }
        } else if (kw_arg_item != NULL && py_arg_item == NULL) {
            if (is_varargs_user_data) {
                /* Special case where user_data is passed as a keyword argument (user_data=foo)
                 * Wrap the value in a tuple to represent variable args for marshaling later on.
                 */
//.........这里部分代码省略.........

PyCodeObject *
PyCode_New(int argcount, int nlocals, int stacksize, int flags,
	   PyObject *code, PyObject *consts, PyObject *names,
	   PyObject *varnames, PyObject *freevars, PyObject *cellvars,
	   PyObject *filename, PyObject *name, int firstlineno,
	   PyObject *lnotab) 
{
	PyCodeObject *co;
	int i;
	/* Check argument types */
	if (argcount < 0 || nlocals < 0 ||
	    code == NULL ||
	    consts == NULL || !PyTuple_Check(consts) ||
	    names == NULL || !PyTuple_Check(names) ||
	    varnames == NULL || !PyTuple_Check(varnames) ||
	    freevars == NULL || !PyTuple_Check(freevars) ||
	    cellvars == NULL || !PyTuple_Check(cellvars) ||
	    name == NULL || !PyString_Check(name) ||
	    filename == NULL || !PyString_Check(filename) ||
	    lnotab == NULL || !PyString_Check(lnotab) ||
	    !PyObject_CheckReadBuffer(code)) {
		PyErr_BadInternalCall();
		return NULL;
	}
	intern_strings(names);
	intern_strings(varnames);
	intern_strings(freevars);
	intern_strings(cellvars);
	/* Intern selected string constants */
	for (i = PyTuple_Size(consts); --i >= 0; ) {
		PyObject *v = PyTuple_GetItem(consts, i);
		if (!PyString_Check(v))
			continue;
		if (!all_name_chars((unsigned char *)PyString_AS_STRING(v)))
			continue;
		PyString_InternInPlace(&PyTuple_GET_ITEM(consts, i));
	}
	co = PyObject_NEW(PyCodeObject, &PyCode_Type);
	if (co != NULL) {
		co->co_argcount = argcount;
		co->co_nlocals = nlocals;
		co->co_stacksize = stacksize;
		co->co_flags = flags;
		co->co_code = optimize_code(code, consts);
		Py_INCREF(consts);
		co->co_consts = consts;
		Py_INCREF(names);
		co->co_names = names;
		Py_INCREF(varnames);
		co->co_varnames = varnames;
		Py_INCREF(freevars);
		co->co_freevars = freevars;
		Py_INCREF(cellvars);
		co->co_cellvars = cellvars;
		Py_INCREF(filename);
		co->co_filename = filename;
		Py_INCREF(name);
		co->co_name = name;
		co->co_firstlineno = firstlineno;
		Py_INCREF(lnotab);
		co->co_lnotab = lnotab;
		if (PyTuple_GET_SIZE(freevars) == 0 &&
		    PyTuple_GET_SIZE(cellvars) == 0)
		    co->co_flags |= CO_NOFREE;
	}
	return co;
}

static PyObj
array_sql_get_element(PyObj self, PyObj indexes_ob)
{
	PyObj tup, element_type, rob = NULL;
	PyPgTypeInfo atypinfo, typinfo;
	ArrayType *at;
	int i, nindexes, indexes[MAXDIM] = {0,};

	/*
	 * Convert the dimensions keyword into a tuple and extract the values
	 * into the dims[] array.
	 */

	tup = Py_Call((PyObj) &PyTuple_Type, indexes_ob);
	if (tup == NULL)
		return(NULL);

	at = DatumGetArrayTypeP(PyPgObject_GetDatum(self));
	Assert(at != NULL);

	nindexes = (int) PyTuple_GET_SIZE(tup);
	if (nindexes != ARR_NDIM(at))
	{
		Py_DECREF(tup);
		Py_INCREF(Py_None);
		return(Py_None);
	}

	for (i = 0; i < nindexes; ++i)
	{
		indexes[i] = (int) PyNumber_AsSsize_t(PyTuple_GET_ITEM(tup, i),
											NULL);
		if (PyErr_Occurred())
		{
			Py_DECREF(tup);
			return(NULL);
		}
	}

	Py_DECREF(tup);

	atypinfo = PyPgTypeInfo(Py_TYPE(self));
	element_type = PyPgType_GetElementType(Py_TYPE(self));
	typinfo = PyPgTypeInfo(element_type);

	/*
	 * Single dimenion array? Get an element.
	 */
	PG_TRY();
	{
		Datum rd;
		bool isnull = false;

		rd = array_ref(at, nindexes, indexes, atypinfo->typlen,
			typinfo->typlen, typinfo->typbyval, typinfo->typalign, &isnull);

		if (isnull)
		{
			rob = Py_None;
			Py_INCREF(rob);
		}
		else
		{
			/*
			 * It points into the array structure, so there's no need to free.
			 */
			rob = PyPgObject_New(element_type, rd);
		}
	}
	PG_CATCH();
	{
		PyErr_SetPgError(false);
	}
	PG_END_TRY();

	return(rob);
}

/*
 * Array.get_element(indexes) - Get an element from the array.
 *
 * This uses Python sequence semantics(zero-based indexes, IndexError's).
 */
static PyObj
array_get_element(PyObj self, PyObj indexes_ob)
{
	PyObj tup, element_type, rob = NULL;
	PyPgTypeInfo atypinfo, typinfo;
	ArrayType *at;
	int i, nindexes, indexes[MAXDIM] = {0,};

	/*
	 * Convert the indexes_ob into a tuple and extract the values
	 * into the indexes[] array. Do any necessary checks along the way.
	 */
	tup = Py_Call((PyObj) &PyTuple_Type, indexes_ob);
	if (tup == NULL)
		return(NULL);

	nindexes = (int) PyTuple_GET_SIZE(tup);

	if (!(nindexes > 0))
	{
		Py_DECREF(tup);
		PyErr_SetString(PyExc_ValueError, "empty index tuple");
		return(NULL);
	}

	at = DatumGetArrayTypeP(PyPgObject_GetDatum(self));
	Assert(at != NULL);

	if (nindexes != ARR_NDIM(at))
	{
		Py_DECREF(tup);
		if (ARR_NDIM(at) == 0)
			PyErr_SetString(PyExc_IndexError, "no elements in array");
		else
			PyErr_Format(PyExc_ValueError, "element access requires exactly %d indexes, given %d",
				ARR_NDIM(at), nindexes);
		return(NULL);
	}

	for (i = 0; i < nindexes; ++i)
	{
		int index;
		index = (int) PyNumber_AsSsize_t(PyTuple_GET_ITEM(tup, i),
											NULL);
		if (PyErr_Occurred())
		{
			Py_DECREF(tup);
			return(NULL);
		}

		/*
		 * Adjust for backwards based access. (feature of get_element)
		 */
		if (index < 0)
			indexes[i] = index + ARR_DIMS(at)[i];
		else
			indexes[i] = index;

		if (indexes[i] >= ARR_DIMS(at)[i] || indexes[i] < 0)
		{
			PyErr_Format(PyExc_IndexError, "index %d out of range %d for axis %d",
				index, ARR_DIMS(at)[0], i);
			Py_DECREF(tup);
			return(NULL);
		}

		/*
		 * Adjust by the lowerbounds..
		 */
		indexes[i] = indexes[i] + ARR_LBOUND(at)[i];
	}

	Py_DECREF(tup);

	atypinfo = PyPgTypeInfo(Py_TYPE(self));
	element_type = PyPgType_GetElementType(Py_TYPE(self));
	typinfo = PyPgTypeInfo(element_type);

	PG_TRY();
	{
		Datum rd;
		bool isnull = false;

		rd = array_ref(at, nindexes, indexes, atypinfo->typlen,
			typinfo->typlen, typinfo->typbyval, typinfo->typalign, &isnull);

		if (isnull)
		{
			rob = Py_None;
			Py_INCREF(rob);
		}
		else
		{
			/*
			 * It points into the array structure, so there's no need to free.
//.........这里部分代码省略.........

static int
find_named_args(DispatcherObject *self, PyObject **pargs, PyObject **pkws)
{
    PyObject *oldargs = *pargs, *newargs;
    PyObject *kws = *pkws;
    Py_ssize_t pos_args = PyTuple_GET_SIZE(oldargs);
    Py_ssize_t named_args, total_args, i;
    Py_ssize_t func_args = PyTuple_GET_SIZE(self->argnames);
    Py_ssize_t defaults = PyTuple_GET_SIZE(self->defargs);
    /* Last parameter with a default value */
    Py_ssize_t last_def = (self->has_stararg)
                          ? func_args - 2
                          : func_args - 1;
    /* First parameter with a default value */
    Py_ssize_t first_def = last_def - defaults + 1;
    /* Minimum number of required arguments */
    Py_ssize_t minargs = first_def;

    if (kws != NULL)
        named_args = PyDict_Size(kws);
    else
        named_args = 0;
    total_args = pos_args + named_args;
    if (!self->has_stararg && total_args > func_args) {
        PyErr_Format(PyExc_TypeError,
                     "too many arguments: expected %d, got %d",
                     (int) func_args, (int) total_args);
        return -1;
    }
    else if (total_args < minargs) {
        if (minargs == func_args)
            PyErr_Format(PyExc_TypeError,
                         "not enough arguments: expected %d, got %d",
                         (int) minargs, (int) total_args);
        else
            PyErr_Format(PyExc_TypeError,
                         "not enough arguments: expected at least %d, got %d",
                         (int) minargs, (int) total_args);
        return -1;
    }
    newargs = PyTuple_New(func_args);
    if (!newargs)
        return -1;
    /* First pack the stararg */
    if (self->has_stararg) {
        Py_ssize_t stararg_size = Py_MAX(0, pos_args - func_args + 1);
        PyObject *stararg = PyTuple_New(stararg_size);
        if (!stararg) {
            Py_DECREF(newargs);
            return -1;
        }
        for (i = 0; i < stararg_size; i++) {
            PyObject *value = PyTuple_GET_ITEM(oldargs, func_args - 1 + i);
            Py_INCREF(value);
            PyTuple_SET_ITEM(stararg, i, value);
        }
        /* Put it in last position */
        PyTuple_SET_ITEM(newargs, func_args - 1, stararg);

    }
    for (i = 0; i < pos_args; i++) {
        PyObject *value = PyTuple_GET_ITEM(oldargs, i);
        if (self->has_stararg && i >= func_args - 1) {
            /* Skip stararg */
            break;
        }
        Py_INCREF(value);
        PyTuple_SET_ITEM(newargs, i, value);
    }

    /* Iterate over missing positional arguments, try to find them in
       named arguments or default values. */
    for (i = pos_args; i < func_args; i++) {
        PyObject *name = PyTuple_GET_ITEM(self->argnames, i);
        if (self->has_stararg && i >= func_args - 1) {
            /* Skip stararg */
            break;
        }
        if (kws != NULL) {
            /* Named argument? */
            PyObject *value = PyDict_GetItem(kws, name);
            if (value != NULL) {
                Py_INCREF(value);
                PyTuple_SET_ITEM(newargs, i, value);
                named_args--;
                continue;
            }
        }
        if (i >= first_def && i <= last_def) {
            /* Argument has a default value? */
            PyObject *value = PyTuple_GET_ITEM(self->defargs, i - first_def);
            Py_INCREF(value);
            PyTuple_SET_ITEM(newargs, i, value);
            continue;
        }
        else if (i < func_args - 1 || !self->has_stararg) {
            PyErr_Format(PyExc_TypeError,
                         "missing argument '%s'",
                         PyString_AsString(name));
            Py_DECREF(newargs);
//.........这里部分代码省略.........

static PyObject*
decode_struct(DecodeBuffer* input, PyObject* output, PyObject* klass, PyObject* spec_seq, long string_limit, long container_limit) {
    int spec_seq_len = PyTuple_Size(spec_seq);
    bool immutable = output == Py_None;
    PyObject* kwargs = NULL;
    if (spec_seq_len == -1) {
        return NULL;
    }

    if (immutable) {
        kwargs = PyDict_New();
        if (!kwargs) {
            PyErr_SetString(PyExc_TypeError, "failed to prepare kwargument storage");
            return NULL;
        }
    }

    while (true) {
        TType type;
        int16_t tag;
        PyObject* item_spec;
        PyObject* fieldval = NULL;
        StructItemSpec parsedspec;

        type = readByte(input);
        if (type == -1) {
            goto error;
        }
        if (type == T_STOP) {
            break;
        }
        tag = readI16(input);
        if (INT_CONV_ERROR_OCCURRED(tag)) {
            goto error;
        }
        if (tag >= 0 && tag < spec_seq_len) {
            item_spec = PyTuple_GET_ITEM(spec_seq, tag);
        } else {
            item_spec = Py_None;
        }

        if (item_spec == Py_None) {
            if (!skip(input, type)) {
                goto error;
            } else {
                continue;
            }
        }

        if (!parse_struct_item_spec(&parsedspec, item_spec)) {
            goto error;
        }
        if (parsedspec.type != type) {
            if (!skip(input, type)) {
                PyErr_Format(PyExc_TypeError, "struct field had wrong type: expected %d but got %d", parsedspec.type, type);
                goto error;
            } else {
                continue;
            }
        }

        fieldval = decode_val(input, parsedspec.type, parsedspec.typeargs, string_limit, container_limit);
        if (fieldval == NULL) {
            goto error;
        }

        if ((immutable && PyDict_SetItem(kwargs, parsedspec.attrname, fieldval) == -1)
                || (!immutable && PyObject_SetAttr(output, parsedspec.attrname, fieldval) == -1)) {
            Py_DECREF(fieldval);
            goto error;
        }
        Py_DECREF(fieldval);
    }
    if (immutable) {
        PyObject* args = PyTuple_New(0);
        PyObject* ret = NULL;
        if (!args) {
            PyErr_SetString(PyExc_TypeError, "failed to prepare argument storage");
            goto error;
        }
        ret = PyObject_Call(klass, args, kwargs);
        Py_DECREF(kwargs);
        Py_DECREF(args);
        return ret;
    }
    Py_INCREF(output);
    return output;

error:
    Py_XDECREF(kwargs);
    return NULL;
}

PyCodeObject *
PyCode_New(int argcount, int kwonlyargcount,
           int nlocals, int stacksize, int flags,
           PyObject *code, PyObject *consts, PyObject *names,
           PyObject *varnames, PyObject *freevars, PyObject *cellvars,
           PyObject *filename, PyObject *name, int firstlineno,
           PyObject *lnotab)
{
    PyCodeObject *co;
    Py_ssize_t *cell2arg = NULL;
    Py_ssize_t i, n_cellvars, n_varnames, total_args;

    /* Check argument types */
    if (argcount < 0 || kwonlyargcount < 0 || nlocals < 0 ||
        code == NULL || !PyBytes_Check(code) ||
        consts == NULL || !PyTuple_Check(consts) ||
        names == NULL || !PyTuple_Check(names) ||
        varnames == NULL || !PyTuple_Check(varnames) ||
        freevars == NULL || !PyTuple_Check(freevars) ||
        cellvars == NULL || !PyTuple_Check(cellvars) ||
        name == NULL || !PyUnicode_Check(name) ||
        filename == NULL || !PyUnicode_Check(filename) ||
        lnotab == NULL || !PyBytes_Check(lnotab)) {
        PyErr_BadInternalCall();
        return NULL;
    }

    /* Ensure that the filename is a ready Unicode string */
    if (PyUnicode_READY(filename) < 0)
        return NULL;

    intern_strings(names);
    intern_strings(varnames);
    intern_strings(freevars);
    intern_strings(cellvars);
    intern_string_constants(consts);

    /* Check for any inner or outer closure references */
    n_cellvars = PyTuple_GET_SIZE(cellvars);
    if (!n_cellvars && !PyTuple_GET_SIZE(freevars)) {
        flags |= CO_NOFREE;
    } else {
        flags &= ~CO_NOFREE;
    }

    n_varnames = PyTuple_GET_SIZE(varnames);
    if (argcount <= n_varnames && kwonlyargcount <= n_varnames) {
        /* Never overflows. */
        total_args = (Py_ssize_t)argcount + (Py_ssize_t)kwonlyargcount +
                ((flags & CO_VARARGS) != 0) + ((flags & CO_VARKEYWORDS) != 0);
    }
    else {
        total_args = n_varnames + 1;
    }
    if (total_args > n_varnames) {
        PyErr_SetString(PyExc_ValueError, "code: varnames is too small");
        return NULL;
    }

    /* Create mapping between cells and arguments if needed. */
    if (n_cellvars) {
        bool used_cell2arg = false;
        cell2arg = PyMem_NEW(Py_ssize_t, n_cellvars);
        if (cell2arg == NULL) {
            PyErr_NoMemory();
            return NULL;
        }
        /* Find cells which are also arguments. */
        for (i = 0; i < n_cellvars; i++) {
            Py_ssize_t j;
            PyObject *cell = PyTuple_GET_ITEM(cellvars, i);
            cell2arg[i] = CO_CELL_NOT_AN_ARG;
            for (j = 0; j < total_args; j++) {
                PyObject *arg = PyTuple_GET_ITEM(varnames, j);
                int cmp = PyUnicode_Compare(cell, arg);
                if (cmp == -1 && PyErr_Occurred()) {
                    PyMem_FREE(cell2arg);
                    return NULL;
                }
                if (cmp == 0) {
                    cell2arg[i] = j;
                    used_cell2arg = true;
                    break;
                }
            }
        }
        if (!used_cell2arg) {
            PyMem_FREE(cell2arg);
            cell2arg = NULL;
        }
    }
    co = PyObject_NEW(PyCodeObject, &PyCode_Type);
    if (co == NULL) {
        if (cell2arg)
            PyMem_FREE(cell2arg);
        return NULL;
    }
    co->co_argcount = argcount;
    co->co_kwonlyargcount = kwonlyargcount;
    co->co_nlocals = nlocals;
//.........这里部分代码省略.........

static PyObject *
GMPy_MPZ_unpack(PyObject *self, PyObject *args)
{
    mp_bitcnt_t nbits, total_bits, guard_bit, extra_bits, temp_bits;
    Py_ssize_t index = 0, lst_count, i, lst_ptr = 0;
    PyObject *result;
    mpz_t temp;
    mp_limb_t extra = 0;
    MPZ_Object *item, *tempx = NULL;
    CTXT_Object *context = NULL;

    if (PyTuple_GET_SIZE(args) != 2) {
        TYPE_ERROR("unpack() requires 'int','int' arguments");
        return NULL;
    }

    nbits = mp_bitcnt_t_From_Integer(PyTuple_GET_ITEM(args, 1));
    if (nbits == (mp_bitcnt_t)(-1) && PyErr_Occurred()) {
        return NULL;
    }

    if (!(tempx = GMPy_MPZ_From_Integer(PyTuple_GET_ITEM(args, 0), context))) {
        TYPE_ERROR("unpack() requires 'int','int' arguments");
        return NULL;
    }

    if (mpz_sgn(tempx->z) < 0) {
        VALUE_ERROR("unpack() requires x >= 0");
        return NULL;
    }

    if (mpz_sgn(tempx->z) == 0) {
        total_bits = 0;
    }
    else {
        total_bits = mpz_sizeinbase(tempx->z, 2);
    }

    lst_count = total_bits / nbits;
    if ((total_bits % nbits) || !lst_count) {
        lst_count += 1;
    }

    if (!(result = PyList_New(lst_count))) {
        Py_DECREF((PyObject*)tempx);
        return NULL;
    }

    if (mpz_sgn(tempx->z) == 0) {
        if (!(item = GMPy_MPZ_New(context))) {
            Py_DECREF((PyObject*)tempx);
            Py_DECREF(result);
            return NULL;
        }
        mpz_set_ui(item->z, 0);
        PyList_SET_ITEM(result, 0, (PyObject*)item);
        Py_DECREF((PyObject*)tempx);
        return result;
    }

    mpz_init(temp);
    guard_bit = nbits + (2 * mp_bits_per_limb);
    extra_bits = 0;
    index = 0;

    while (lst_ptr < lst_count) {
        i = 0;
        temp_bits = 0;
        mpz_set_ui(temp, 0);
        mpz_setbit(temp, guard_bit);
        while (temp_bits + extra_bits < nbits) {
            temp->_mp_d[i++] = mpz_getlimbn(tempx->z, index++);
            temp_bits += mp_bits_per_limb;
        }
        mpz_clrbit(temp, guard_bit);
        mpz_mul_2exp(temp, temp, extra_bits);
        if (mpz_sgn(temp) == 0 && extra != 0) {
            mpz_set_ui(temp, 1);
            temp->_mp_d[0] = extra;
        }
        else {
           mpn_add_1(temp->_mp_d, temp->_mp_d, mpz_size(temp), extra);
        }
        temp_bits += extra_bits;

        while ((lst_ptr < lst_count) && (temp_bits >= nbits)) {
            if(!(item = GMPy_MPZ_New(context))) {
                mpz_clear(temp);
                Py_DECREF((PyObject*)tempx);
                Py_DECREF(result);
                return NULL;
            }
            mpz_tdiv_r_2exp(item->z, temp, nbits);
            PyList_SET_ITEM(result, lst_ptr++, (PyObject*)item);
            mpz_tdiv_q_2exp(temp, temp, nbits);
            temp_bits -= nbits;
        }
        extra = mpz_getlimbn(temp, 0);
        extra_bits = temp_bits;
    }
//.........这里部分代码省略.........

/* This function is called by the tp_dealloc handler to clear weak references.
 *
 * This iterates through the weak references for 'object' and calls callbacks
 * for those references which have one.  It returns when all callbacks have
 * been attempted.
 */
void
PyObject_ClearWeakRefs(PyObject *object)
{
    PyWeakReference **list;

    if (object == NULL
        || !PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))
        || object->ob_refcnt != 0) {
        PyErr_BadInternalCall();
        return;
    }
    list = GET_WEAKREFS_LISTPTR(object);
    /* Remove the callback-less basic and proxy references */
    if (*list != NULL && (*list)->wr_callback == NULL) {
        clear_weakref(*list);
        if (*list != NULL && (*list)->wr_callback == NULL)
            clear_weakref(*list);
    }
    if (*list != NULL) {
        PyWeakReference *current = *list;
        Py_ssize_t count = _PyWeakref_GetWeakrefCount(current);
        int restore_error = PyErr_Occurred() ? 1 : 0;
        PyObject *err_type, *err_value, *err_tb;

        if (restore_error)
            PyErr_Fetch(&err_type, &err_value, &err_tb);
        if (count == 1) {
            PyObject *callback = current->wr_callback;

            current->wr_callback = NULL;
            clear_weakref(current);
            if (callback != NULL) {
                if (((PyObject *)current)->ob_refcnt > 0)
                    handle_callback(current, callback);
                Py_DECREF(callback);
            }
        }
        else {
            PyObject *tuple;
            Py_ssize_t i = 0;

            tuple = PyTuple_New(count * 2);
            if (tuple == NULL) {
                if (restore_error)
                    PyErr_Fetch(&err_type, &err_value, &err_tb);
                return;
            }

            for (i = 0; i < count; ++i) {
                PyWeakReference *next = current->wr_next;

                if (((PyObject *)current)->ob_refcnt > 0)
                {
                    Py_INCREF(current);
                    PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
                    PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
                }
                else {
                    Py_DECREF(current->wr_callback);
                }
                current->wr_callback = NULL;
                clear_weakref(current);
                current = next;
            }
            for (i = 0; i < count; ++i) {
                PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1);

                /* The tuple may have slots left to NULL */
                if (callback != NULL) {
                    PyObject *item = PyTuple_GET_ITEM(tuple, i * 2);
                    handle_callback((PyWeakReference *)item, callback);
                }
            }
            Py_DECREF(tuple);
        }
        if (restore_error)
            PyErr_Restore(err_type, err_value, err_tb);
    }
}

PyObject*
_PyCode_ConstantKey(PyObject *op)
{
    PyObject *key;

    /* Py_None and Py_Ellipsis are singletons. */
    if (op == Py_None || op == Py_Ellipsis
       || PyLong_CheckExact(op)
       || PyUnicode_CheckExact(op)
          /* code_richcompare() uses _PyCode_ConstantKey() internally */
       || PyCode_Check(op))
    {
        /* Objects of these types are always different from object of other
         * type and from tuples. */
        Py_INCREF(op);
        key = op;
    }
    else if (PyBool_Check(op) || PyBytes_CheckExact(op)) {
        /* Make booleans different from integers 0 and 1.
         * Avoid BytesWarning from comparing bytes with strings. */
        key = PyTuple_Pack(2, Py_TYPE(op), op);
    }
    else if (PyFloat_CheckExact(op)) {
        double d = PyFloat_AS_DOUBLE(op);
        /* all we need is to make the tuple different in either the 0.0
         * or -0.0 case from all others, just to avoid the "coercion".
         */
        if (d == 0.0 && copysign(1.0, d) < 0.0)
            key = PyTuple_Pack(3, Py_TYPE(op), op, Py_None);
        else
            key = PyTuple_Pack(2, Py_TYPE(op), op);
    }
    else if (PyComplex_CheckExact(op)) {
        Py_complex z;
        int real_negzero, imag_negzero;
        /* For the complex case we must make complex(x, 0.)
           different from complex(x, -0.) and complex(0., y)
           different from complex(-0., y), for any x and y.
           All four complex zeros must be distinguished.*/
        z = PyComplex_AsCComplex(op);
        real_negzero = z.real == 0.0 && copysign(1.0, z.real) < 0.0;
        imag_negzero = z.imag == 0.0 && copysign(1.0, z.imag) < 0.0;
        /* use True, False and None singleton as tags for the real and imag
         * sign, to make tuples different */
        if (real_negzero && imag_negzero) {
            key = PyTuple_Pack(3, Py_TYPE(op), op, Py_True);
        }
        else if (imag_negzero) {
            key = PyTuple_Pack(3, Py_TYPE(op), op, Py_False);
        }
        else if (real_negzero) {
            key = PyTuple_Pack(3, Py_TYPE(op), op, Py_None);
        }
        else {
            key = PyTuple_Pack(2, Py_TYPE(op), op);
        }
    }
    else if (PyTuple_CheckExact(op)) {
        Py_ssize_t i, len;
        PyObject *tuple;

        len = PyTuple_GET_SIZE(op);
        tuple = PyTuple_New(len);
        if (tuple == NULL)
            return NULL;

        for (i=0; i < len; i++) {
            PyObject *item, *item_key;

            item = PyTuple_GET_ITEM(op, i);
            item_key = _PyCode_ConstantKey(item);
            if (item_key == NULL) {
                Py_DECREF(tuple);
                return NULL;
            }

            PyTuple_SET_ITEM(tuple, i, item_key);
        }

        key = PyTuple_Pack(2, tuple, op);
        Py_DECREF(tuple);
    }
    else if (PyFrozenSet_CheckExact(op)) {
        Py_ssize_t pos = 0;
        PyObject *item;
        Py_hash_t hash;
        Py_ssize_t i, len;
        PyObject *tuple, *set;

        len = PySet_GET_SIZE(op);
        tuple = PyTuple_New(len);
        if (tuple == NULL)
            return NULL;

        i = 0;
        while (_PySet_NextEntry(op, &pos, &item, &hash)) {
            PyObject *item_key;

            item_key = _PyCode_ConstantKey(item);
            if (item_key == NULL) {
//.........这里部分代码省略.........

static PyObject *next(PyObject *self)
{
	ligolw_RowDumper *rowdumper = (ligolw_RowDumper *) self;
	const Py_ssize_t n = PyTuple_GET_SIZE(rowdumper->attributes);
	PyObject *tokens;
	PyObject *row;
	PyObject *result;
	Py_ssize_t i;

	/*
	 * retrieve the next row object
	 */

	if(!PyIter_Check(rowdumper->iter)) {
		PyErr_SetObject(PyExc_TypeError, rowdumper->iter);
		return NULL;
	}
	row = PyIter_Next(rowdumper->iter);
	if(!row) {
		if(!PyErr_Occurred()) {
			Py_DECREF(rowdumper->iter);
			rowdumper->iter = Py_None;
			Py_INCREF(rowdumper->iter);
			PyErr_SetNone(PyExc_StopIteration);
		}
		return NULL;
	}

	/*
	 * wipe out the tuple of tokens from the previous row, and start a
	 * new tuple
	 */

	Py_DECREF(rowdumper->tokens);
	rowdumper->tokens = Py_None;
	Py_INCREF(rowdumper->tokens);

	tokens = PyTuple_New(n);
	if(!tokens) {
		Py_DECREF(row);
		return NULL;
	}

	/*
	 * retrieve attributes from the row object one-by-one, convert to
	 * strings, and insert into new token tuple
	 */

	for(i = 0; i < n; i++) {
		PyObject *val = PyObject_GetAttr(row, PyTuple_GET_ITEM(rowdumper->attributes, i));
		PyObject *token;

		if(!val) {
			Py_DECREF(tokens);
			Py_DECREF(row);
			return NULL;
		}

		if(val == Py_None)
			token = PyUnicode_FromUnicode(NULL, 0); /* u"" */
		else
			token = PyObject_CallFunctionObjArgs(PyTuple_GET_ITEM(rowdumper->formats, i), val, NULL);
		Py_DECREF(val);

		if(!token) {
			Py_DECREF(tokens);
			Py_DECREF(row);
			return NULL;
		}

		PyTuple_SET_ITEM(tokens, i, token);
	}
	Py_DECREF(row);

	/*
	 * that worked, so expose the new token tuple
	 */

	Py_DECREF(rowdumper->tokens);
	rowdumper->tokens = tokens;

	/*
	 * return tokens concatenated into a single string using the
	 * delimiter
	 */

	result = PyUnicode_Join(rowdumper->delimiter, rowdumper->tokens);

	rowdumper->rows_converted += result != NULL;

	return result;
}

//.........这里部分代码省略.........
      char* p;
      for (p=h; *p; p++) {
        if (*p=='-') *p='_';
      }
      dict_set(py_environ, hname, PyString_FromString(itr->value));
    }
  }

  dict_set(py_environ, "wsgi.url_scheme", PyString_FromString(conn->secure? "https" : "http"));

  if (req->content_length) {
    if (content_fd) {
      dict_set(py_environ, "nxweb.req.content_fd", PyInt_FromLong(content_fd));
    }
    else {
      dict_set(py_environ, "nxweb.req.content", PyByteArray_FromStringAndSize(req->content? req->content : "", req->content_received));
    }
  }
  if (req->if_modified_since) dict_set(py_environ, "nxweb.req.if_modified_since", PyLong_FromLong(req->if_modified_since));
  dict_set(py_environ, "nxweb.req.uid", PyLong_FromLongLong(req->uid));
  if (req->parent_req) {
    nxweb_http_request* preq=req->parent_req;
    while (preq->parent_req) preq=preq->parent_req; // find root request
    if (preq->uid) {
      dict_set(py_environ, "nxweb.req.root_uid", PyLong_FromLongLong(preq->uid));
    }
  }

  // call python
  PyTuple_SetItem(py_func_args, 0, py_environ);
  PyObject* py_result=PyObject_CallObject(py_nxweb_on_request_func, py_func_args);
  Py_DECREF(py_func_args);
  if (py_result && PyTuple_Check(py_result) && PyTuple_Size(py_result)==3) {
    PyObject* py_status=PyTuple_GET_ITEM(py_result, 0);
    PyObject* py_headers=PyTuple_GET_ITEM(py_result, 1);
    PyObject* py_body=PyTuple_GET_ITEM(py_result, 2);

    if (py_status && PyString_Check(py_status)) {
      const char* status_string=PyString_AS_STRING(py_status);
      int status_code=0;
      const char* p=status_string;
      while (*p && *p>='0' && *p<='9') {
        status_code=status_code*10+(*p-'0');
        p++;
      }
      while (*p && *p==' ') p++;
      if (status_code>=200 && status_code<600 && *p) {
        resp->status_code=status_code;
        resp->status=nxb_copy_str(nxb, p);
      }
    }

    if (py_headers && PyList_Check(py_headers)) {
      const int size=PyList_Size(py_headers);
      int i;
      for (i=0; i<size; i++) {
        PyObject* py_header_tuple=PyList_GET_ITEM(py_headers, i);
        if (py_header_tuple && PyTuple_Check(py_header_tuple) && PyTuple_Size(py_header_tuple)==2) {
          PyObject* py_name=PyTuple_GET_ITEM(py_header_tuple, 0);
          PyObject* py_value=PyTuple_GET_ITEM(py_header_tuple, 1);
          if (py_name && PyString_Check(py_name) && py_value && PyString_Check(py_value)) {
            nxweb_add_response_header_safe(resp, PyString_AS_STRING(py_name), PyString_AS_STRING(py_value));
          }
        }
      }
    }

static PyObject *
_lookup(lookup *self,
        PyObject *required, PyObject *provided, PyObject *name,
        PyObject *default_)
{
  PyObject *result, *key, *cache;

#ifdef PY3K
  if ( name && !PyUnicode_Check(name) )
#else
  if ( name && !PyString_Check(name) && !PyUnicode_Check(name) )
#endif
  {
    PyErr_SetString(PyExc_ValueError,
                    "name is not a string or unicode");
    return NULL;
  }
  cache = _getcache(self, provided, name);
  if (cache == NULL)
    return NULL;

  required = tuplefy(required);
  if (required == NULL)
    return NULL;

  if (PyTuple_GET_SIZE(required) == 1)
    key = PyTuple_GET_ITEM(required, 0);
  else
    key = required;

  result = PyDict_GetItem(cache, key);
  if (result == NULL)
    {
      int status;

      result = PyObject_CallMethodObjArgs(OBJECT(self), str_uncached_lookup,
                                          required, provided, name, NULL);
      if (result == NULL)
        {
          Py_DECREF(required);
          return NULL;
        }
      status = PyDict_SetItem(cache, key, result);
      Py_DECREF(required);
      if (status < 0)
        {
          Py_DECREF(result);
          return NULL;
        }
    }
  else
    {
      Py_INCREF(result);
      Py_DECREF(required);
    }

  if (result == Py_None && default_ != NULL)
    {
      Py_DECREF(Py_None);
      Py_INCREF(default_);
      return default_;
    }

  return result;
}

static PyObject *get(PyObject *self, PyObject *args) {
  int i, molid, frame;
  PyObject *selected;
  int num_selected;
  char *attr = 0;

  //
  // get molid, list, and attribute
  //
  if (!PyArg_ParseTuple(args, (char *)"iiO!s", 
                        &molid, &frame, &PyTuple_Type, &selected, &attr))
    return NULL;  // bad args

  //
  // check molecule
  //
  VMDApp *app = get_vmdapp();
  Molecule *mol = app->moleculeList->mol_from_id(molid);
  if (!mol) {
    PyErr_SetString(PyExc_ValueError, "molecule no longer exists");
    return NULL;
  }
  const int num_atoms = mol->nAtoms;
 
  // 
  // Check for a valid attribute
  //
  SymbolTable *table = app->atomSelParser;
  int attrib_index = table->find_attribute(attr);
  if (attrib_index == -1) {
    PyErr_SetString(PyExc_ValueError, "unknown atom attribute");
    return NULL;
  }
  SymbolTableElement *elem = table->fctns.data(attrib_index);
  if (elem->is_a != SymbolTableElement::KEYWORD &&
      elem->is_a != SymbolTableElement::SINGLEWORD) {
    PyErr_SetString(PyExc_ValueError, "attribute is not a keyword or singleword");
    return NULL;
  }
 
  // 
  // fetch the data
  //

  atomsel_ctxt context(table, mol, frame, attr);
  num_selected = PyTuple_Size(selected);
  PyObject *newlist = PyList_New(num_selected); 

  // XXX should check that selected contains valid indices
  int *flgs = new int[num_atoms];
  memset(flgs,0,num_atoms*sizeof(int));
  for (i=0; i<num_selected; i++) 
    flgs[PyInt_AsLong(PyTuple_GET_ITEM(selected,i))] = 1;

  if (elem->is_a == SymbolTableElement::SINGLEWORD) {
    int *tmp = new int[num_atoms];
    memcpy(tmp, flgs, num_atoms*sizeof(int));
    elem->keyword_single(&context, num_atoms, tmp);
    int j=0;
    for (i=0; i<num_atoms; i++) {
      if (flgs[i]) {
        if (tmp[i]) {
          PyList_SET_ITEM(newlist, j++, PyInt_FromLong(1));       
        } else {
          PyList_SET_ITEM(newlist, j++, PyInt_FromLong(0));       
        }
      }
    }
    delete [] tmp;
  } else {
    switch(table->fctns.data(attrib_index)->returns_a) {
      case (SymbolTableElement::IS_STRING):
      {
        const char **tmp= new const char *[num_atoms];
        elem->keyword_string(&context, num_atoms, tmp, flgs);
        int j=0;
        for (int i=0; i<num_atoms; i++) {
          if (flgs[i]) {
            PyList_SET_ITEM(newlist, j++, PyString_FromString(tmp[i]));
          }
        }
        delete [] tmp;
      }
      break;
      case (SymbolTableElement::IS_INT):
      {
        int *tmp = new int[num_atoms];
        elem->keyword_int(&context, num_atoms, tmp, flgs);
        int j=0;
        for (int i=0; i<num_atoms; i++) {
          if (flgs[i]) {
            PyList_SET_ITEM(newlist, j++, PyInt_FromLong(tmp[i]));
          }
        }
        delete [] tmp;
      }
      break;
      case (SymbolTableElement::IS_FLOAT):
      {
        double *tmp = new double[num_atoms];
//.........这里部分代码省略.........