To: vim_dev@googlegroups.com

Subject: Patch 7.4.151

Fcc: outbox

From: Bram Moolenaar <Bram@moolenaar.net>

Mime-Version: 1.0

Content-Type: text/plain; charset=UTF-8

Content-Transfer-Encoding: 8bit

------------

Patch 7.4.151

Problem:    Python: slices with steps are not supported.

Solution:   Support slices in Python vim.List. (ZyX)

Files:	    src/eval.c, src/if_py_both.h, src/if_python3.c, src/if_python.c,

	    src/proto/eval.pro, src/testdir/test86.in, src/testdir/test86.ok,

	    src/testdir/test87.in, src/testdir/test87.ok

*** ../vim-7.4.150/src/eval.c	2014-01-14 15:24:24.000000000 +0100

--- src/eval.c	2014-01-14 16:24:49.000000000 +0100

***************

*** 6425,6430 ****

--- 6425,6440 ----

      if (ni == NULL)

  	return FAIL;

      copy_tv(tv, &ni->li_tv);

+     list_insert(l, ni, item);

+     return OK;

+ }

+ 

+     void

+ list_insert(l, ni, item)

+     list_T	*l;

+     listitem_T	*ni;

+     listitem_T	*item;

+ {

      if (item == NULL)

  	/* Append new item at end of list. */

  	list_append(l, ni);

***************

*** 6446,6452 ****

  	item->li_prev = ni;

  	++l->lv_len;

      }

-     return OK;

  }

  /*

--- 6456,6461 ----

*** ../vim-7.4.150/src/if_py_both.h	2014-01-10 18:16:00.000000000 +0100

--- src/if_py_both.h	2014-01-14 16:31:49.000000000 +0100

***************

*** 36,43 ****

  #define PyErr_SET_STRING(exc, str) PyErr_SetString(exc, _(str))

  #define PyErr_SetVim(str) PyErr_SetString(VimError, str)

  #define PyErr_SET_VIM(str) PyErr_SET_STRING(VimError, str)

! #define PyErr_FORMAT(exc, str, tail) PyErr_Format(exc, _(str), tail)

! #define PyErr_VIM_FORMAT(str, tail) PyErr_FORMAT(VimError, str, tail)

  #define Py_TYPE_NAME(obj) (obj->ob_type->tp_name == NULL \

  	? "(NULL)" \

--- 36,44 ----

  #define PyErr_SET_STRING(exc, str) PyErr_SetString(exc, _(str))

  #define PyErr_SetVim(str) PyErr_SetString(VimError, str)

  #define PyErr_SET_VIM(str) PyErr_SET_STRING(VimError, str)

! #define PyErr_FORMAT(exc, str, arg) PyErr_Format(exc, _(str), arg)

! #define PyErr_FORMAT2(exc, str, arg1, arg2) PyErr_Format(exc, _(str), arg1,arg2)

! #define PyErr_VIM_FORMAT(str, arg) PyErr_FORMAT(VimError, str, arg)

  #define Py_TYPE_NAME(obj) (obj->ob_type->tp_name == NULL \

  	? "(NULL)" \

***************

*** 2108,2115 ****

  };

  static PyTypeObject ListType;

- static PySequenceMethods ListAsSeq;

- static PyMappingMethods ListAsMapping;

  typedef struct

  {

--- 2109,2114 ----

***************

*** 2253,2259 ****

  }

      static PyObject *

! ListItem(ListObject *self, Py_ssize_t index)

  {

      listitem_T	*li;

--- 2252,2258 ----

  }

      static PyObject *

! ListIndex(ListObject *self, Py_ssize_t index)

  {

      listitem_T	*li;

***************

*** 2273,2436 ****

      return ConvertToPyObject(&li->li_tv);

  }

- #define PROC_RANGE \

-     if (last < 0) {\

- 	if (last < -size) \

- 	    last = 0; \

- 	else \

- 	    last += size; \

-     } \

-     if (first < 0) \

- 	first = 0; \

-     if (first > size) \

- 	first = size; \

-     if (last > size) \

- 	last = size;

- 

      static PyObject *

! ListSlice(ListObject *self, Py_ssize_t first, Py_ssize_t last)

  {

      PyInt	i;

-     PyInt	size = ListLength(self);

-     PyInt	n;

      PyObject	*list;

-     int		reversed = 0;

!     PROC_RANGE

!     if (first >= last)

! 	first = last;

!     n = last-first;

!     list = PyList_New(n);

      if (list == NULL)

  	return NULL;

!     for (i = 0; i < n; ++i)

      {

! 	PyObject	*item = ListItem(self, first + i);

  	if (item == NULL)

  	{

  	    Py_DECREF(list);

  	    return NULL;

  	}

! 	PyList_SET_ITEM(list, ((reversed)?(n-i-1):(i)), item);

      }

      return list;

  }

- typedef struct

- {

-     listwatch_T	lw;

-     list_T	*list;

- } listiterinfo_T;

- 

-     static void

- ListIterDestruct(listiterinfo_T *lii)

- {

-     list_rem_watch(lii->list, &lii->lw);

-     PyMem_Free(lii);

- }

- 

      static PyObject *

! ListIterNext(listiterinfo_T **lii)

  {

!     PyObject	*ret;

! 

!     if (!((*lii)->lw.lw_item))

! 	return NULL;

! 

!     if (!(ret = ConvertToPyObject(&((*lii)->lw.lw_item->li_tv))))

! 	return NULL;

! 

!     (*lii)->lw.lw_item = (*lii)->lw.lw_item->li_next;

! 

!     return ret;

! }

! 

!     static PyObject *

! ListIter(ListObject *self)

! {

!     listiterinfo_T	*lii;

!     list_T	*l = self->list;

! 

!     if (!(lii = PyMem_New(listiterinfo_T, 1)))

      {

! 	PyErr_NoMemory();

! 	return NULL;

      }

! 

!     list_add_watch(l, &lii->lw);

!     lii->lw.lw_item = l->lv_first;

!     lii->list = l;

! 

!     return IterNew(lii,

! 	    (destructorfun) ListIterDestruct, (nextfun) ListIterNext,

! 	    NULL, NULL);

! }

! 

!     static int

! ListAssItem(ListObject *self, Py_ssize_t index, PyObject *obj)

! {

!     typval_T	tv;

!     list_T	*l = self->list;

!     listitem_T	*li;

!     Py_ssize_t	length = ListLength(self);

! 

!     if (l->lv_lock)

      {

! 	RAISE_LOCKED_LIST;

! 	return -1;

      }

!     if (index > length || (index == length && obj == NULL))

      {

! 	PyErr_SET_STRING(PyExc_IndexError, N_("list index out of range"));

! 	return -1;

!     }

!     if (obj == NULL)

      {

! 	li = list_find(l, (long) index);

! 	list_remove(l, li, li);

! 	clear_tv(&li->li_tv);

! 	vim_free(li);

! 	return 0;

      }

!     if (ConvertFromPyObject(obj, &tv) == -1)

! 	return -1;

! 

!     if (index == length)

      {

! 	if (list_append_tv(l, &tv) == FAIL)

! 	{

! 	    clear_tv(&tv;;

! 	    PyErr_SET_VIM(N_("failed to add item to list"));

! 	    return -1;

! 	}

      }

!     else

      {

! 	li = list_find(l, (long) index);

! 	clear_tv(&li->li_tv);

! 	copy_tv(&tv, &li->li_tv);

! 	clear_tv(&tv;;

      }

-     return 0;

  }

      static int

! ListAssSlice(ListObject *self, Py_ssize_t first, Py_ssize_t last, PyObject *obj)

  {

-     PyInt	size = ListLength(self);

      PyObject	*iterator;

      PyObject	*item;

      listitem_T	*li;

      listitem_T	*next;

      typval_T	v;

      list_T	*l = self->list;

      PyInt	i;

      if (l->lv_lock)

      {

--- 2272,2381 ----

      return ConvertToPyObject(&li->li_tv);

  }

      static PyObject *

! ListSlice(ListObject *self, Py_ssize_t first, Py_ssize_t step,

! 	  Py_ssize_t slicelen)

  {

      PyInt	i;

      PyObject	*list;

!     if (step == 0)

!     {

! 	PyErr_SET_STRING(PyExc_ValueError, N_("slice step cannot be zero"));

! 	return NULL;

!     }

!     list = PyList_New(slicelen);

      if (list == NULL)

  	return NULL;

!     for (i = 0; i < slicelen; ++i)

      {

! 	PyObject	*item;

! 

! 	item = ListIndex(self, first + i*step);

  	if (item == NULL)

  	{

  	    Py_DECREF(list);

  	    return NULL;

  	}

! 	PyList_SET_ITEM(list, i, item);

      }

      return list;

  }

      static PyObject *

! ListItem(ListObject *self, PyObject* idx)

  {

! #if PY_MAJOR_VERSION < 3

!     if (PyInt_Check(idx))

      {

! 	long _idx = PyInt_AsLong(idx);

! 	return ListIndex(self, _idx);

      }

!     else

! #endif

!     if (PyLong_Check(idx))

      {

! 	long _idx = PyLong_AsLong(idx);

! 	return ListIndex(self, _idx);

      }

!     else if (PySlice_Check(idx))

      {

! 	Py_ssize_t start, stop, step, slicelen;

! 	if (PySlice_GetIndicesEx(idx, ListLength(self),

! 				 &start, &stop, &step, &slicelen) < 0)

! 	    return NULL;

! 	return ListSlice(self, start, step, slicelen);

!     }

!     else

      {

! 	RAISE_INVALID_INDEX_TYPE(idx);

! 	return NULL;

      }

+ }

!     static void

! list_restore(Py_ssize_t numadded, Py_ssize_t numreplaced, Py_ssize_t slicelen,

! 	list_T *l, listitem_T **lis, listitem_T *lastaddedli)

! {

!     while (numreplaced--)

      {

! 	list_insert(l, lis[numreplaced], lis[slicelen + numreplaced]);

! 	listitem_remove(l, lis[slicelen + numreplaced]);

      }

!     while (numadded--)

      {

! 	listitem_T	*next;

! 

! 	next = lastaddedli->li_prev;

! 	listitem_remove(l, lastaddedli);

! 	lastaddedli = next;

      }

  }

      static int

! ListAssSlice(ListObject *self, Py_ssize_t first,

! 	     Py_ssize_t step, Py_ssize_t slicelen, PyObject *obj)

  {

      PyObject	*iterator;

      PyObject	*item;

      listitem_T	*li;

+     listitem_T	*lastaddedli = NULL;

      listitem_T	*next;

      typval_T	v;

      list_T	*l = self->list;

      PyInt	i;

+     PyInt	j;

+     PyInt	numreplaced = 0;

+     PyInt	numadded = 0;

+     PyInt	size;

+     listitem_T	**lis;

+ 

+     size = ListLength(self);

      if (l->lv_lock)

      {

***************

*** 2438,2444 ****

  	return -1;

      }

!     PROC_RANGE

      if (first == size)

  	li = NULL;

--- 2383,2424 ----

  	return -1;

      }

!     if (step == 0)

!     {

! 	PyErr_SET_STRING(PyExc_ValueError, N_("slice step cannot be zero"));

! 	return -1;

!     }

! 

!     if (step != 1 && slicelen == 0)

!     {

! 	/* Nothing to do. Only error out if obj has some items. */

! 	int		ret = 0;

! 

! 	if (obj == NULL)

! 	    return 0;

! 

! 	if (!(iterator = PyObject_GetIter(obj)))

! 	    return -1;

! 

! 	if ((item = PyIter_Next(iterator)))

! 	{

! 	    PyErr_FORMAT(PyExc_ValueError,

! 		    N_("attempt to assign sequence of size greater then %d "

! 			"to extended slice"), 0);

! 	    Py_DECREF(item);

! 	    ret = -1;

! 	}

! 	Py_DECREF(iterator);

! 	return ret;

!     }

! 

!     if (obj != NULL)

! 	/* XXX May allocate zero bytes. */

! 	if (!(lis = PyMem_New(listitem_T *, slicelen * 2)))

! 	{

! 	    PyErr_NoMemory();

! 	    return -1;

! 	}

      if (first == size)

  	li = NULL;

***************

*** 2449,2465 ****

  	{

  	    PyErr_VIM_FORMAT(N_("internal error: no vim list item %d"),

  		    (int)first);

  	    return -1;

  	}

! 	if (last > first)

  	{

! 	    i = last - first;

! 	    while (i-- && li != NULL)

! 	    {

! 		next = li->li_next;

  		listitem_remove(l, li);

! 		li = next;

! 	    }

  	}

      }

--- 2429,2461 ----

  	{

  	    PyErr_VIM_FORMAT(N_("internal error: no vim list item %d"),

  		    (int)first);

+ 	    if (obj != NULL)

+ 		PyMem_Free(lis);

  	    return -1;

  	}

! 	i = slicelen;

! 	while (i-- && li != NULL)

  	{

! 	    j = step;

! 	    next = li;

! 	    if (step > 0)

! 		while (next != NULL && ((next = next->li_next) != NULL) && --j);

! 	    else

! 		while (next != NULL && ((next = next->li_prev) != NULL) && ++j);

! 

! 	    if (obj == NULL)

  		listitem_remove(l, li);

! 	    else

! 		lis[slicelen - i - 1] = li;

! 

! 	    li = next;

! 	}

! 	if (li == NULL && i != -1)

! 	{

! 	    PyErr_SET_VIM(N_("internal error: not enough list items"));

! 	    if (obj != NULL)

! 		PyMem_Free(lis);

! 	    return -1;

  	}

      }

***************

*** 2467,2499 ****

  	return 0;

      if (!(iterator = PyObject_GetIter(obj)))

  	return -1;

      while ((item = PyIter_Next(iterator)))

      {

  	if (ConvertFromPyObject(item, &v) == -1)

  	{

  	    Py_DECREF(iterator);

  	    Py_DECREF(item);

  	    return -1;

  	}

  	Py_DECREF(item);

! 	if (list_insert_tv(l, &v, li) == FAIL)

  	{

  	    clear_tv(&v);

  	    PyErr_SET_VIM(N_("internal error: failed to add item to list"));

  	    return -1;

  	}

  	clear_tv(&v);

      }

      Py_DECREF(iterator);

      if (PyErr_Occurred())

  	return -1;

      return 0;

  }

      static PyObject *

  ListConcatInPlace(ListObject *self, PyObject *obj)

  {

--- 2463,2634 ----

  	return 0;

      if (!(iterator = PyObject_GetIter(obj)))

+     {

+ 	PyMem_Free(lis);

  	return -1;

+     }

+     i = 0;

      while ((item = PyIter_Next(iterator)))

      {

  	if (ConvertFromPyObject(item, &v) == -1)

  	{

  	    Py_DECREF(iterator);

  	    Py_DECREF(item);

+ 	    PyMem_Free(lis);

  	    return -1;

  	}

  	Py_DECREF(item);

! 	if (list_insert_tv(l, &v, numreplaced < slicelen

! 				    ? lis[numreplaced]

! 				    : li) == FAIL)

  	{

  	    clear_tv(&v);

  	    PyErr_SET_VIM(N_("internal error: failed to add item to list"));

+ 	    list_restore(numadded, numreplaced, slicelen, l, lis, lastaddedli);

+ 	    PyMem_Free(lis);

  	    return -1;

  	}

+ 	if (numreplaced < slicelen)

+ 	{

+ 	    lis[slicelen + numreplaced] = lis[numreplaced]->li_prev;

+ 	    list_remove(l, lis[numreplaced], lis[numreplaced]);

+ 	    numreplaced++;

+ 	}

+ 	else

+ 	{

+ 	    if (li)

+ 		lastaddedli = li->li_prev;

+ 	    else

+ 		lastaddedli = l->lv_last;

+ 	    numadded++;

+ 	}

  	clear_tv(&v);

+ 	if (step != 1 && i >= slicelen)

+ 	{

+ 	    Py_DECREF(iterator);

+ 	    PyErr_FORMAT(PyExc_ValueError,

+ 		    N_("attempt to assign sequence of size greater then %d "

+ 			"to extended slice"), slicelen);

+ 	    list_restore(numadded, numreplaced, slicelen, l, lis, lastaddedli);

+ 	    PyMem_Free(lis);

+ 	    return -1;

+ 	}

+ 	++i;

      }

      Py_DECREF(iterator);

+     if (step != 1 && i != slicelen)

+     {

+ 	PyErr_FORMAT2(PyExc_ValueError,

+ 		N_("attempt to assign sequence of size %d to extended slice "

+ 		    "of size %d"), i, slicelen);

+ 	list_restore(numadded, numreplaced, slicelen, l, lis, lastaddedli);

+ 	PyMem_Free(lis);

+ 	return -1;

+     }

+ 

      if (PyErr_Occurred())

+     {

+ 	list_restore(numadded, numreplaced, slicelen, l, lis, lastaddedli);

+ 	PyMem_Free(lis);

  	return -1;

+     }

+ 

+     for (i = 0; i < numreplaced; i++)

+ 	listitem_free(lis[i]);

+     if (step == 1)

+ 	for (i = numreplaced; i < slicelen; i++)

+ 	    listitem_remove(l, lis[i]);

+ 

+     PyMem_Free(lis);

      return 0;

  }

+     static int

+ ListAssIndex(ListObject *self, Py_ssize_t index, PyObject *obj)

+ {

+     typval_T	tv;

+     list_T	*l = self->list;

+     listitem_T	*li;

+     Py_ssize_t	length = ListLength(self);

+ 

+     if (l->lv_lock)

+     {

+ 	RAISE_LOCKED_LIST;

+ 	return -1;

+     }

+     if (index > length || (index == length && obj == NULL))

+     {

+ 	PyErr_SET_STRING(PyExc_IndexError, N_("list index out of range"));

+ 	return -1;

+     }

+ 

+     if (obj == NULL)

+     {

+ 	li = list_find(l, (long) index);

+ 	list_remove(l, li, li);

+ 	clear_tv(&li->li_tv);

+ 	vim_free(li);

+ 	return 0;

+     }

+ 

+     if (ConvertFromPyObject(obj, &tv) == -1)

+ 	return -1;

+ 

+     if (index == length)

+     {

+ 	if (list_append_tv(l, &tv) == FAIL)

+ 	{

+ 	    clear_tv(&tv;;

+ 	    PyErr_SET_VIM(N_("failed to add item to list"));

+ 	    return -1;

+ 	}

+     }

+     else

+     {

+ 	li = list_find(l, (long) index);

+ 	clear_tv(&li->li_tv);

+ 	copy_tv(&tv, &li->li_tv);

+ 	clear_tv(&tv;;

+     }

+     return 0;

+ }

+ 

+     static Py_ssize_t

+ ListAssItem(ListObject *self, PyObject *idx, PyObject *obj)

+ {

+ #if PY_MAJOR_VERSION < 3

+     if (PyInt_Check(idx))

+     {

+ 	long _idx = PyInt_AsLong(idx);

+ 	return ListAssIndex(self, _idx, obj);

+     }

+     else

+ #endif

+     if (PyLong_Check(idx))

+     {

+ 	long _idx = PyLong_AsLong(idx);

+ 	return ListAssIndex(self, _idx, obj);

+     }

+     else if (PySlice_Check(idx))

+     {

+ 	Py_ssize_t start, stop, step, slicelen;

+ 

+ 	if (PySlice_GetIndicesEx(idx, ListLength(self),

+ 				 &start, &stop, &step, &slicelen) < 0)

+ 	    return -1;

+ 	return ListAssSlice(self, start, step, slicelen,

+ 		obj);

+     }

+     else

+     {

+ 	RAISE_INVALID_INDEX_TYPE(idx);

+ 	return -1;

+     }

+ }

+ 

      static PyObject *

  ListConcatInPlace(ListObject *self, PyObject *obj)

  {

***************

*** 2520,2525 ****

--- 2655,2710 ----

      return (PyObject *)(self);

  }

+ typedef struct

+ {

+     listwatch_T	lw;

+     list_T	*list;

+ } listiterinfo_T;

+ 

+     static void

+ ListIterDestruct(listiterinfo_T *lii)

+ {

+     list_rem_watch(lii->list, &lii->lw);

+     PyMem_Free(lii);

+ }

+ 

+     static PyObject *

+ ListIterNext(listiterinfo_T **lii)

+ {

+     PyObject	*ret;

+ 

+     if (!((*lii)->lw.lw_item))

+ 	return NULL;

+ 

+     if (!(ret = ConvertToPyObject(&((*lii)->lw.lw_item->li_tv))))

+ 	return NULL;

+ 

+     (*lii)->lw.lw_item = (*lii)->lw.lw_item->li_next;

+ 

+     return ret;

+ }

+ 

+     static PyObject *

+ ListIter(ListObject *self)

+ {

+     listiterinfo_T	*lii;

+     list_T	*l = self->list;

+ 

+     if (!(lii = PyMem_New(listiterinfo_T, 1)))

+     {

+ 	PyErr_NoMemory();

+ 	return NULL;

+     }

+ 

+     list_add_watch(l, &lii->lw);

+     lii->lw.lw_item = l->lv_first;

+     lii->list = l;

+ 

+     return IterNew(lii,

+ 	    (destructorfun) ListIterDestruct, (nextfun) ListIterNext,

+ 	    NULL, NULL);

+ }

+ 

  static char *ListAttrs[] = {

      "locked",

      NULL

***************

*** 2567,2572 ****

--- 2752,2776 ----

      }

  }

+ static PySequenceMethods ListAsSeq = {

+     (lenfunc)		ListLength,	 /* sq_length,	  len(x)   */

+     (binaryfunc)	0,		 /* RangeConcat, sq_concat,  x+y   */

+     0,					 /* RangeRepeat, sq_repeat,  x*n   */

+     (PyIntArgFunc)	ListIndex,	 /* sq_item,	  x[i]	   */

+     0,					 /* was_sq_slice,     x[i:j]   */

+     (PyIntObjArgProc)	ListAssIndex,	 /* sq_as_item,  x[i]=v   */

+     0,					 /* was_sq_ass_slice, x[i:j]=v */

+     0,					 /* sq_contains */

+     (binaryfunc)	ListConcatInPlace,/* sq_inplace_concat */

+     0,					 /* sq_inplace_repeat */

+ };

+ 

+ static PyMappingMethods ListAsMapping = {

+     /* mp_length	*/ (lenfunc) ListLength,

+     /* mp_subscript     */ (binaryfunc) ListItem,

+     /* mp_ass_subscript */ (objobjargproc) ListAssItem,

+ };

+ 

  static struct PyMethodDef ListMethods[] = {

      {"extend",	(PyCFunction)ListConcatInPlace,	METH_O,		""},

      {"__dir__",	(PyCFunction)ListDir,		METH_NOARGS,	""},

*** ../vim-7.4.150/src/if_python3.c	2013-11-03 00:28:20.000000000 +0100

--- src/if_python3.c	2014-01-14 16:32:40.000000000 +0100

***************

*** 97,102 ****

--- 97,105 ----

  #define Py_ssize_t_fmt "n"

  #define Py_bytes_fmt "y"

+ #define PyIntArgFunc	ssizeargfunc

+ #define PyIntObjArgProc	ssizeobjargproc

+ 

  #if defined(DYNAMIC_PYTHON3) || defined(PROTO)

  # ifndef WIN3264

***************

*** 292,298 ****

  static int (*py3_PyMapping_Check)(PyObject *);

  static PyObject* (*py3_PyMapping_Keys)(PyObject *);

  static int (*py3_PySlice_GetIndicesEx)(PyObject *r, Py_ssize_t length,

! 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step, Py_ssize_t *slicelength);

  static PyObject* (*py3_PyErr_NoMemory)(void);

  static void (*py3_Py_Finalize)(void);

  static void (*py3_PyErr_SetString)(PyObject *, const char *);

--- 295,302 ----

  static int (*py3_PyMapping_Check)(PyObject *);

  static PyObject* (*py3_PyMapping_Keys)(PyObject *);

  static int (*py3_PySlice_GetIndicesEx)(PyObject *r, Py_ssize_t length,

! 		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,

! 		     Py_ssize_t *slicelen);

  static PyObject* (*py3_PyErr_NoMemory)(void);

  static void (*py3_Py_Finalize)(void);

  static void (*py3_PyErr_SetString)(PyObject *, const char *);

***************

*** 1478,1553 ****

  /* List object - Definitions

   */

- static PySequenceMethods ListAsSeq = {

-     (lenfunc)		ListLength,	 /* sq_length,	  len(x)   */

-     (binaryfunc)	0,		 /* RangeConcat, sq_concat,  x+y   */

-     (ssizeargfunc)	0,		 /* RangeRepeat, sq_repeat,  x*n   */

-     (ssizeargfunc)	ListItem,	 /* sq_item,	  x[i]	   */

-     (void *)		0,		 /* was_sq_slice,     x[i:j]   */

-     (ssizeobjargproc)	ListAssItem,	 /* sq_as_item,  x[i]=v   */

-     (void *)		0,		 /* was_sq_ass_slice, x[i:j]=v */

-     0,					 /* sq_contains */

-     (binaryfunc)	ListConcatInPlace,/* sq_inplace_concat */

-     0,					 /* sq_inplace_repeat */

- };

- 

- static PyObject *ListSubscript(PyObject *, PyObject *);

- static Py_ssize_t ListAsSubscript(PyObject *, PyObject *, PyObject *);

- 

- static PyMappingMethods ListAsMapping = {

-     /* mp_length	*/ (lenfunc) ListLength,

-     /* mp_subscript     */ (binaryfunc) ListSubscript,

-     /* mp_ass_subscript */ (objobjargproc) ListAsSubscript,

- };

- 

-     static PyObject *

- ListSubscript(PyObject *self, PyObject* idx)

- {

-     if (PyLong_Check(idx))

-     {

- 	long _idx = PyLong_AsLong(idx);

- 	return ListItem((ListObject *)(self), _idx);

-     }

-     else if (PySlice_Check(idx))

-     {

- 	Py_ssize_t start, stop, step, slicelen;

- 

- 	if (PySlice_GetIndicesEx(idx, ListLength((ListObject *)(self)),

- 				 &start, &stop, &step, &slicelen) < 0)

- 	    return NULL;

- 	return ListSlice((ListObject *)(self), start, stop);

-     }

-     else

-     {

- 	RAISE_INVALID_INDEX_TYPE(idx);

- 	return NULL;

-     }

- }

- 

-     static Py_ssize_t

- ListAsSubscript(PyObject *self, PyObject *idx, PyObject *obj)

- {

-     if (PyLong_Check(idx))

-     {

- 	long _idx = PyLong_AsLong(idx);

- 	return ListAssItem((ListObject *)(self), _idx, obj);

-     }

-     else if (PySlice_Check(idx))

-     {

- 	Py_ssize_t start, stop, step, slicelen;

- 

- 	if (PySlice_GetIndicesEx(idx, ListLength((ListObject *)(self)),

- 				 &start, &stop, &step, &slicelen) < 0)

- 	    return -1;

- 	return ListAssSlice((ListObject *)(self), start, stop, obj);

-     }

-     else

-     {

- 	RAISE_INVALID_INDEX_TYPE(idx);

- 	return -1;