Issue #6472: The xml.etree package is updated to ElementTree 1.3. The cElementTree module is updated too.

1 files changed, 506 insertions, 253 deletions

diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index 684081c..62aee85 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -1,21 +1,15 @@
 /*
  * ElementTree
- * $Id: _elementtree.c 2657 2006-03-12 20:50:32Z fredrik $
+ * $Id: _elementtree.c 3473 2009-01-11 22:53:55Z fredrik $
  *
  * elementtree accelerator
  *
  * History:
  * 1999-06-20 fl  created (as part of sgmlop)
  * 2001-05-29 fl  effdom edition
- * 2001-06-05 fl  backported to unix; fixed bogus free in clear
- * 2001-07-10 fl  added findall helper
  * 2003-02-27 fl  elementtree edition (alpha)
  * 2004-06-03 fl  updates for elementtree 1.2
- * 2005-01-05 fl  added universal name cache, Element/SubElement factories
- * 2005-01-06 fl  moved python helpers into C module; removed 1.5.2 support
- * 2005-01-07 fl  added 2.1 support; work around broken __copy__ in 2.3
- * 2005-01-08 fl  added makeelement method; fixed path support
- * 2005-01-10 fl  optimized memory usage
+ * 2005-01-05 fl  major optimization effort
  * 2005-01-11 fl  first public release (cElementTree 0.8)
  * 2005-01-12 fl  split element object into base and extras
  * 2005-01-13 fl  use tagged pointers for tail/text (cElementTree 0.9)
@@ -35,16 +29,23 @@
  * 2005-12-16 fl  added support for non-standard encodings
  * 2006-03-08 fl  fixed a couple of potential null-refs and leaks
  * 2006-03-12 fl  merge in 2.5 ssize_t changes
+ * 2007-08-25 fl  call custom builder's close method from XMLParser
+ * 2007-08-31 fl  added iter, extend from ET 1.3
+ * 2007-09-01 fl  fixed ParseError exception, setslice source type, etc
+ * 2007-09-03 fl  fixed handling of negative insert indexes
+ * 2007-09-04 fl  added itertext from ET 1.3
+ * 2007-09-06 fl  added position attribute to ParseError exception
+ * 2008-06-06 fl  delay error reporting in iterparse (from Hrvoje Niksic)
  *
- * Copyright (c) 1999-2006 by Secret Labs AB.  All rights reserved.
- * Copyright (c) 1999-2006 by Fredrik Lundh.
+ * Copyright (c) 1999-2009 by Secret Labs AB.  All rights reserved.
+ * Copyright (c) 1999-2009 by Fredrik Lundh.
  *
  * info@pythonware.com
  * http://www.pythonware.com
  */
 
 /* Licensed to PSF under a Contributor Agreement. */
-/* See http://www.python.org/2.4/license for licensing details. */
+/* See http://www.python.org/psf/license for licensing details. */
 
 #include "Python.h"
 
@@ -56,7 +57,7 @@
 /* Leave defined to include the expat-based XMLParser type */
 #define USE_EXPAT
 
-/* Define to to all expat calls via pyexpat's embedded expat library */
+/* Define to do all expat calls via pyexpat's embedded expat library */
 /* #define USE_PYEXPAT_CAPI */
 
 /* An element can hold this many children without extra memory
@@ -94,6 +95,11 @@ do { memory -= size; printf("%8d - %s\n", memory, comment); } while (0)
 #endif
 
 /* compatibility macros */
+#if (PY_VERSION_HEX < 0x02060000)
+#define Py_REFCNT(ob) (((PyObject*)(ob))->ob_refcnt)
+#define Py_TYPE(ob) (((PyObject*)(ob))->ob_type)
+#endif
+
 #if (PY_VERSION_HEX < 0x02050000)
 typedef int Py_ssize_t;
 #define lenfunc inquiry
@@ -101,18 +107,11 @@ typedef int Py_ssize_t;
 
 #if (PY_VERSION_HEX < 0x02040000)
 #define PyDict_CheckExact PyDict_Check
-#if (PY_VERSION_HEX < 0x02020000)
-#define PyList_CheckExact PyList_Check
-#define PyString_CheckExact PyString_Check
-#if (PY_VERSION_HEX >= 0x01060000)
-#define Py_USING_UNICODE /* always enabled for 2.0 and 2.1 */
-#endif
-#endif
-#endif
 
 #if !defined(Py_RETURN_NONE)
 #define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None
 #endif
+#endif
 
 /* macros used to store 'join' flags in string object pointers.  note
    that all use of text and tail as object pointers must be wrapped in
@@ -123,9 +122,11 @@ typedef int Py_ssize_t;
 #define JOIN_OBJ(p) ((PyObject*) ((Py_uintptr_t) (p) & ~1))
 
 /* glue functions (see the init function for details) */
+static PyObject* elementtree_parseerror_obj;
 static PyObject* elementtree_copyelement_obj;
 static PyObject* elementtree_deepcopy_obj;
-static PyObject* elementtree_getiterator_obj;
+static PyObject* elementtree_iter_obj;
+static PyObject* elementtree_itertext_obj;
 static PyObject* elementpath_obj;
 
 /* helpers */
@@ -209,23 +210,6 @@ list_join(PyObject* list)
     return result;
 }
 
-#if (PY_VERSION_HEX < 0x02020000)
-LOCAL(int)
-PyDict_Update(PyObject* dict, PyObject* other)
-{
-    /* PyDict_Update emulation for 2.1 and earlier */
-
-    PyObject* res;
-    
-    res = PyObject_CallMethod(dict, "update", "O", other);
-    if (!res)
-        return -1;
-
-    Py_DECREF(res);
-    return 0;
-}
-#endif
-
 /* -------------------------------------------------------------------- */
 /* the element type */
 
@@ -330,7 +314,7 @@ element_new(PyObject* tag, PyObject* attrib)
         if (element_new_extra(self, attrib) < 0) {
             PyObject_Del(self);
             return NULL;
-	}
+        }
 
         self->extra->length = 0;
         self->extra->allocated = STATIC_CHILDREN;
@@ -428,6 +412,7 @@ element_get_attrib(ElementObject* self)
     PyObject* res = self->extra->attrib;
 
     if (res == Py_None) {
+        Py_DECREF(res);
         /* create missing dictionary */
         res = PyDict_New();
         if (!res)
@@ -709,6 +694,8 @@ element_deepcopy(ElementObject* self, PyObject* args)
 
     /* add object to memo dictionary (so deepcopy won't visit it again) */
     id = PyInt_FromLong((Py_uintptr_t) self);
+    if (!id)
+        goto error;
 
     i = PyDict_SetItem(memo, id, (PyObject*) element);
 
@@ -732,7 +719,8 @@ checkpath(PyObject* tag)
 
     /* check if a tag contains an xpath character */
 
-#define PATHCHAR(ch) (ch == '/' || ch == '*' || ch == '[' || ch == '@')
+#define PATHCHAR(ch) \
+    (ch == '/' || ch == '*' || ch == '[' || ch == '@' || ch == '.')
 
 #if defined(Py_USING_UNICODE)
     if (PyUnicode_Check(tag)) {
@@ -765,17 +753,51 @@ checkpath(PyObject* tag)
 }
 
 static PyObject*
+element_extend(ElementObject* self, PyObject* args)
+{
+    PyObject* seq;
+    Py_ssize_t i, seqlen = 0;
+
+    PyObject* seq_in;
+    if (!PyArg_ParseTuple(args, "O:extend", &seq_in))
+        return NULL;
+
+    seq = PySequence_Fast(seq_in, "");
+    if (!seq) {
+        PyErr_Format(
+            PyExc_TypeError,
+            "expected sequence, not \"%.200s\"", Py_TYPE(seq_in)->tp_name
+            );
+        return NULL;
+    }
+
+    seqlen = PySequence_Size(seq);
+    for (i = 0; i < seqlen; i++) {
+        PyObject* element = PySequence_Fast_GET_ITEM(seq, i);
+        if (element_add_subelement(self, element) < 0) {
+            Py_DECREF(seq);
+            return NULL;
+        }
+    }
+
+    Py_DECREF(seq);
+
+    Py_RETURN_NONE;
+}
+
+static PyObject*
 element_find(ElementObject* self, PyObject* args)
 {
     int i;
 
     PyObject* tag;
-    if (!PyArg_ParseTuple(args, "O:find", &tag))
+    PyObject* namespaces = Py_None;
+    if (!PyArg_ParseTuple(args, "O|O:find", &tag, &namespaces))
         return NULL;
 
-    if (checkpath(tag))
+    if (checkpath(tag) || namespaces != Py_None)
         return PyObject_CallMethod(
-            elementpath_obj, "find", "OO", self, tag
+            elementpath_obj, "find", "OOO", self, tag, namespaces
             );
 
     if (!self->extra)
@@ -800,12 +822,13 @@ element_findtext(ElementObject* self, PyObject* args)
 
     PyObject* tag;
     PyObject* default_value = Py_None;
-    if (!PyArg_ParseTuple(args, "O|O:findtext", &tag, &default_value))
+    PyObject* namespaces = Py_None;
+    if (!PyArg_ParseTuple(args, "O|OO:findtext", &tag, &default_value, &namespaces))
         return NULL;
 
-    if (checkpath(tag))
+    if (checkpath(tag) || namespaces != Py_None)
         return PyObject_CallMethod(
-            elementpath_obj, "findtext", "OOO", self, tag, default_value
+            elementpath_obj, "findtext", "OOOO", self, tag, default_value, namespaces
             );
 
     if (!self->extra) {
@@ -835,12 +858,13 @@ element_findall(ElementObject* self, PyObject* args)
     PyObject* out;
 
     PyObject* tag;
-    if (!PyArg_ParseTuple(args, "O:findall", &tag))
+    PyObject* namespaces = Py_None;
+    if (!PyArg_ParseTuple(args, "O|O:findall", &tag, &namespaces))
         return NULL;
 
-    if (checkpath(tag))
+    if (checkpath(tag) || namespaces != Py_None)
         return PyObject_CallMethod(
-            elementpath_obj, "findall", "OO", self, tag
+            elementpath_obj, "findall", "OOO", self, tag, namespaces
             );
 
     out = PyList_New(0);
@@ -865,6 +889,19 @@ element_findall(ElementObject* self, PyObject* args)
 }
 
 static PyObject*
+element_iterfind(ElementObject* self, PyObject* args)
+{
+    PyObject* tag;
+    PyObject* namespaces = Py_None;
+    if (!PyArg_ParseTuple(args, "O|O:iterfind", &tag, &namespaces))
+        return NULL;
+
+    return PyObject_CallMethod(
+        elementpath_obj, "iterfind", "OOO", self, tag, namespaces
+        );
+}
+
+static PyObject*
 element_get(ElementObject* self, PyObject* args)
 {
     PyObject* value;
@@ -892,6 +929,8 @@ element_getchildren(ElementObject* self, PyObject* args)
     int i;
     PyObject* list;
 
+    /* FIXME: report as deprecated? */
+
     if (!PyArg_ParseTuple(args, ":getchildren"))
         return NULL;
 
@@ -912,18 +951,18 @@ element_getchildren(ElementObject* self, PyObject* args)
 }
 
 static PyObject*
-element_getiterator(ElementObject* self, PyObject* args)
+element_iter(ElementObject* self, PyObject* args)
 {
     PyObject* result;
     
     PyObject* tag = Py_None;
-    if (!PyArg_ParseTuple(args, "|O:getiterator", &tag))
+    if (!PyArg_ParseTuple(args, "|O:iter", &tag))
         return NULL;
 
-    if (!elementtree_getiterator_obj) {
+    if (!elementtree_iter_obj) {
         PyErr_SetString(
             PyExc_RuntimeError,
-            "getiterator helper not found"
+            "iter helper not found"
             );
         return NULL;
     }
@@ -935,61 +974,58 @@ element_getiterator(ElementObject* self, PyObject* args)
     Py_INCREF(self); PyTuple_SET_ITEM(args, 0, (PyObject*) self);
     Py_INCREF(tag);  PyTuple_SET_ITEM(args, 1, (PyObject*) tag);
 
-    result = PyObject_CallObject(elementtree_getiterator_obj, args);
+    result = PyObject_CallObject(elementtree_iter_obj, args);
 
     Py_DECREF(args);
 
     return result;
 }
 
+
 static PyObject*
-element_getitem(PyObject* self_, Py_ssize_t index)
+element_itertext(ElementObject* self, PyObject* args)
 {
-    ElementObject* self = (ElementObject*) self_;
+    PyObject* result;
+    
+    if (!PyArg_ParseTuple(args, ":itertext"))
+        return NULL;
 
-    if (!self->extra || index < 0 || index >= self->extra->length) {
+    if (!elementtree_itertext_obj) {
         PyErr_SetString(
-            PyExc_IndexError,
-            "child index out of range"
+            PyExc_RuntimeError,
+            "itertext helper not found"
             );
         return NULL;
     }
 
-    Py_INCREF(self->extra->children[index]);
-    return self->extra->children[index];
+    args = PyTuple_New(1);
+    if (!args)
+        return NULL;
+
+    Py_INCREF(self); PyTuple_SET_ITEM(args, 0, (PyObject*) self);
+
+    result = PyObject_CallObject(elementtree_itertext_obj, args);
+
+    Py_DECREF(args);
+
+    return result;
 }
 
 static PyObject*
-element_getslice(PyObject* self_, Py_ssize_t start, Py_ssize_t end)
+element_getitem(PyObject* self_, Py_ssize_t index)
 {
     ElementObject* self = (ElementObject*) self_;
-    Py_ssize_t i;
-    PyObject* list;
 
-    if (!self->extra)
-        return PyList_New(0);
-
-    /* standard clamping */
-    if (start < 0)
-        start = 0;
-    if (end < 0)
-        end = 0;
-    if (end > self->extra->length)
-        end = self->extra->length;
-    if (start > end)
-        start = end;
-
-    list = PyList_New(end - start);
-    if (!list)
+    if (!self->extra || index < 0 || index >= self->extra->length) {
+        PyErr_SetString(
+            PyExc_IndexError,
+            "child index out of range"
+            );
         return NULL;
-
-    for (i = start; i < end; i++) {
-        PyObject* item = self->extra->children[i];
-        Py_INCREF(item);
-        PyList_SET_ITEM(list, i - start, item);
     }
 
-    return list;
+    Py_INCREF(self->extra->children[index]);
+    return self->extra->children[index];
 }
 
 static PyObject*
@@ -1006,8 +1042,11 @@ element_insert(ElementObject* self, PyObject* args)
     if (!self->extra)
         element_new_extra(self, NULL);
 
-    if (index < 0)
-        index = 0;
+    if (index < 0) {
+        index += self->extra->length;
+        if (index < 0)
+            index = 0;
+    }
     if (index > self->extra->length)
         index = self->extra->length;
 
@@ -1188,77 +1227,6 @@ element_set(ElementObject* self, PyObject* args)
 }
 
 static int
-element_setslice(PyObject* self_, Py_ssize_t start, Py_ssize_t end, PyObject* item)
-{
-    ElementObject* self = (ElementObject*) self_;
-    Py_ssize_t i, new, old;
-    PyObject* recycle = NULL;
-
-    if (!self->extra)
-        element_new_extra(self, NULL);
-
-    /* standard clamping */
-    if (start < 0)
-        start = 0;
-    if (end < 0)
-        end = 0;
-    if (end > self->extra->length)
-        end = self->extra->length;
-    if (start > end)
-        start = end;
-
-    old = end - start;
-
-    if (item == NULL)
-        new = 0;
-    else if (PyList_CheckExact(item)) {
-        new = PyList_GET_SIZE(item);
-    } else {
-        /* FIXME: support arbitrary sequences? */
-        PyErr_Format(
-            PyExc_TypeError,
-            "expected list, not \"%.200s\"", Py_TYPE(item)->tp_name
-            );
-        return -1;
-    }
-
-    if (old > 0) {
-        /* to avoid recursive calls to this method (via decref), move
-           old items to the recycle bin here, and get rid of them when
-           we're done modifying the element */
-        recycle = PyList_New(old);
-        for (i = 0; i < old; i++)
-            PyList_SET_ITEM(recycle, i, self->extra->children[i + start]);
-    }
-
-    if (new < old) {
-        /* delete slice */
-        for (i = end; i < self->extra->length; i++)
-            self->extra->children[i + new - old] = self->extra->children[i];
-    } else if (new > old) {
-        /* insert slice */
-        if (element_resize(self, new - old) < 0)
-            return -1;
-        for (i = self->extra->length-1; i >= end; i--)
-            self->extra->children[i + new - old] = self->extra->children[i];
-    }
-
-    /* replace the slice */
-    for (i = 0; i < new; i++) {
-        PyObject* element = PyList_GET_ITEM(item, i);
-        Py_INCREF(element);
-        self->extra->children[i + start] = element;
-    }
-
-    self->extra->length += new - old;
-
-    /* discard the recycle bin, and everything in it */
-    Py_XDECREF(recycle);
-
-    return 0;
-}
-
-static int
 element_setitem(PyObject* self_, Py_ssize_t index, PyObject* item)
 {
     ElementObject* self = (ElementObject*) self_;
@@ -1288,6 +1256,190 @@ element_setitem(PyObject* self_, Py_ssize_t index, PyObject* item)
     return 0;
 }
 
+static PyObject*
+element_subscr(PyObject* self_, PyObject* item)
+{
+    ElementObject* self = (ElementObject*) self_;
+
+#if (PY_VERSION_HEX < 0x02050000)
+    if (PyInt_Check(item) || PyLong_Check(item)) {
+        long i = PyInt_AsLong(item);
+#else
+    if (PyIndex_Check(item)) {
+        Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
+#endif
+
+        if (i == -1 && PyErr_Occurred()) {
+            return NULL;
+        }
+        if (i < 0 && self->extra)
+            i += self->extra->length;
+        return element_getitem(self_, i);
+    }
+    else if (PySlice_Check(item)) {
+        Py_ssize_t start, stop, step, slicelen, cur, i;
+        PyObject* list;
+
+        if (!self->extra)
+            return PyList_New(0);
+
+        if (PySlice_GetIndicesEx((PySliceObject *)item,
+                self->extra->length,
+                &start, &stop, &step, &slicelen) < 0) {
+            return NULL;
+        }
+
+        if (slicelen <= 0)
+            return PyList_New(0);
+        else {
+            list = PyList_New(slicelen);
+            if (!list)
+                return NULL;
+
+            for (cur = start, i = 0; i < slicelen;
+                 cur += step, i++) {
+                PyObject* item = self->extra->children[cur];
+                Py_INCREF(item);
+                PyList_SET_ITEM(list, i, item);
+            }
+
+            return list;
+        }
+    }
+    else {
+        PyErr_SetString(PyExc_TypeError,
+                "element indices must be integers");
+        return NULL;
+    }
+}
+
+static int
+element_ass_subscr(PyObject* self_, PyObject* item, PyObject* value)
+{
+    ElementObject* self = (ElementObject*) self_;
+
+#if (PY_VERSION_HEX < 0x02050000)
+    if (PyInt_Check(item) || PyLong_Check(item)) {
+        long i = PyInt_AsLong(item);
+#else
+    if (PyIndex_Check(item)) {
+        Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
+#endif
+
+        if (i == -1 && PyErr_Occurred()) {
+            return -1;
+        }
+        if (i < 0 && self->extra)
+            i += self->extra->length;
+        return element_setitem(self_, i, value);
+    }
+    else if (PySlice_Check(item)) {
+        Py_ssize_t start, stop, step, slicelen, newlen, cur, i;
+
+        PyObject* recycle = NULL;
+        PyObject* seq = NULL;
+
+        if (!self->extra)
+            element_new_extra(self, NULL);
+
+        if (PySlice_GetIndicesEx((PySliceObject *)item,
+                self->extra->length,
+                &start, &stop, &step, &slicelen) < 0) {
+            return -1;
+        }
+
+        if (value == NULL)
+            newlen = 0;
+        else {
+            seq = PySequence_Fast(value, "");
+            if (!seq) {
+                PyErr_Format(
+                    PyExc_TypeError,
+                    "expected sequence, not \"%.200s\"", Py_TYPE(value)->tp_name
+                    );
+                return -1;
+            }
+            newlen = PySequence_Size(seq);
+        }
+
+        if (step !=  1 && newlen != slicelen)
+        {
+            PyErr_Format(PyExc_ValueError,
+#if (PY_VERSION_HEX < 0x02050000)
+                "attempt to assign sequence of size %d "
+                "to extended slice of size %d",
+#else
+                "attempt to assign sequence of size %zd "
+                "to extended slice of size %zd",
+#endif
+                newlen, slicelen
+                );
+            return -1;
+        }
+
+
+        /* Resize before creating the recycle bin, to prevent refleaks. */
+        if (newlen > slicelen) {
+            if (element_resize(self, newlen - slicelen) < 0) {
+                if (seq) {
+                    Py_DECREF(seq);
+                }
+                return -1;
+            }
+        }
+
+        if (slicelen > 0) {
+            /* to avoid recursive calls to this method (via decref), move
+               old items to the recycle bin here, and get rid of them when
+               we're done modifying the element */
+            recycle = PyList_New(slicelen);
+            if (!recycle) {
+                if (seq) {
+                    Py_DECREF(seq);
+                }
+                return -1;
+            }
+            for (cur = start, i = 0; i < slicelen;
+                 cur += step, i++)
+                PyList_SET_ITEM(recycle, i, self->extra->children[cur]);
+        }
+
+        if (newlen < slicelen) {
+            /* delete slice */
+            for (i = stop; i < self->extra->length; i++)
+                self->extra->children[i + newlen - slicelen] = self->extra->children[i];
+        } else if (newlen > slicelen) {
+            /* insert slice */
+            for (i = self->extra->length-1; i >= stop; i--)
+                self->extra->children[i + newlen - slicelen] = self->extra->children[i];
+        }
+
+        /* replace the slice */
+        for (cur = start, i = 0; i < newlen;
+             cur += step, i++) {
+            PyObject* element = PySequence_Fast_GET_ITEM(seq, i);
+            Py_INCREF(element);
+            self->extra->children[cur] = element;
+        }
+
+        self->extra->length += newlen - slicelen;
+
+        if (seq) {
+            Py_DECREF(seq);
+        }
+
+        /* discard the recycle bin, and everything in it */
+        Py_XDECREF(recycle);
+
+        return 0;
+    }
+    else {
+        PyErr_SetString(PyExc_TypeError,
+                "element indices must be integers");
+        return -1;
+    }
+}
+
 static PyMethodDef element_methods[] = {
 
     {"clear", (PyCFunction) element_clear, METH_VARARGS},
@@ -1300,10 +1452,15 @@ static PyMethodDef element_methods[] = {
     {"findall", (PyCFunction) element_findall, METH_VARARGS},
 
     {"append", (PyCFunction) element_append, METH_VARARGS},
+    {"extend", (PyCFunction) element_extend, METH_VARARGS},
     {"insert", (PyCFunction) element_insert, METH_VARARGS},
     {"remove", (PyCFunction) element_remove, METH_VARARGS},
 
-    {"getiterator", (PyCFunction) element_getiterator, METH_VARARGS},
+    {"iter", (PyCFunction) element_iter, METH_VARARGS},
+    {"itertext", (PyCFunction) element_itertext, METH_VARARGS},
+    {"iterfind", (PyCFunction) element_iterfind, METH_VARARGS},
+
+    {"getiterator", (PyCFunction) element_iter, METH_VARARGS},
     {"getchildren", (PyCFunction) element_getchildren, METH_VARARGS},
 
     {"items", (PyCFunction) element_items, METH_VARARGS},
@@ -1334,22 +1491,31 @@ element_getattr(ElementObject* self, char* name)
 {
     PyObject* res;
 
+    /* handle common attributes first */
+    if (strcmp(name, "tag") == 0) {
+        res = self->tag;
+        Py_INCREF(res);
+        return res;
+    } else if (strcmp(name, "text") == 0) {
+        res = element_get_text(self);
+        Py_INCREF(res);
+        return res;
+    }
+
+    /* methods */
     res = Py_FindMethod(element_methods, (PyObject*) self, name);
     if (res)
-	return res;
+        return res;
 
     PyErr_Clear();
 
-    if (strcmp(name, "tag") == 0)
-	res = self->tag;
-    else if (strcmp(name, "text") == 0)
-        res = element_get_text(self);
-    else if (strcmp(name, "tail") == 0) {
+    /* less common attributes */
+    if (strcmp(name, "tail") == 0) {
         res = element_get_tail(self);
     } else if (strcmp(name, "attrib") == 0) {
         if (!self->extra)
             element_new_extra(self, NULL);
-	res = element_get_attrib(self);
+        res = element_get_attrib(self);
     } else {
         PyErr_SetString(PyExc_AttributeError, name);
         return NULL;
@@ -1404,9 +1570,15 @@ static PySequenceMethods element_as_sequence = {
     0, /* sq_concat */
     0, /* sq_repeat */
     element_getitem,
-    element_getslice,
+    0,
     element_setitem,
-    element_setslice,
+    0,
+};
+
+static PyMappingMethods element_as_mapping = {
+    (lenfunc) element_length,
+    (binaryfunc) element_subscr,
+    (objobjargproc) element_ass_subscr,
 };
 
 statichere PyTypeObject Element_Type = {
@@ -1421,6 +1593,7 @@ statichere PyTypeObject Element_Type = {
     (reprfunc)element_repr, /* tp_repr */
     0, /* tp_as_number */
     &element_as_sequence, /* tp_as_sequence */
+    &element_as_mapping, /* tp_as_mapping */
 };
 
 /* ==================================================================== */
@@ -1558,7 +1731,7 @@ treebuilder_handle_start(TreeBuilderObject* self, PyObject* tag,
     } else {
         if (self->root) {
             PyErr_SetString(
-                PyExc_SyntaxError,
+                elementtree_parseerror_obj,
                 "multiple elements on top level"
                 );
             goto error;
@@ -1699,7 +1872,7 @@ treebuilder_handle_end(TreeBuilderObject* self, PyObject* tag)
 
 LOCAL(void)
 treebuilder_handle_namespace(TreeBuilderObject* self, int start,
-                             const char* prefix, const char *uri)
+                             PyObject *prefix, PyObject *uri)
 {
     PyObject* res;
     PyObject* action;
@@ -1712,8 +1885,7 @@ treebuilder_handle_namespace(TreeBuilderObject* self, int start,
         if (!self->start_ns_event_obj)
             return;
         action = self->start_ns_event_obj;
-        /* FIXME: prefix and uri use utf-8 encoding! */
-        parcel = Py_BuildValue("ss", (prefix) ? prefix : "", uri);
+        parcel = Py_BuildValue("OO", prefix, uri);
         if (!parcel)
             return;
         Py_INCREF(action);
@@ -1857,6 +2029,7 @@ typedef struct {
     PyObject* names;
 
     PyObject* handle_xml;
+
     PyObject* handle_start;
     PyObject* handle_data;
     PyObject* handle_end;
@@ -1864,6 +2037,8 @@ typedef struct {
     PyObject* handle_comment;
     PyObject* handle_pi;
 
+    PyObject* handle_close;
+
 } XMLParserObject;
 
 staticforward PyTypeObject XMLParser_Type;
@@ -1971,6 +2146,36 @@ makeuniversal(XMLParserObject* self, const char* string)
     return value;
 }
 
+static void
+expat_set_error(const char* message, int line, int column)
+{
+    PyObject *error;
+    PyObject *position;
+    char buffer[256];
+
+    sprintf(buffer, "%s: line %d, column %d", message, line, column);
+
+    error = PyObject_CallFunction(elementtree_parseerror_obj, "s", buffer);
+    if (!error)
+        return;
+
+    /* add position attribute */
+    position = Py_BuildValue("(ii)", line, column);
+    if (!position) {
+        Py_DECREF(error);
+        return;
+    }
+    if (PyObject_SetAttrString(error, "position", position) == -1) {
+        Py_DECREF(error);
+        Py_DECREF(position);
+        return;
+    }
+    Py_DECREF(position);
+
+    PyErr_SetObject(elementtree_parseerror_obj, error);
+    Py_DECREF(error);
+}
+
 /* -------------------------------------------------------------------- */
 /* handlers */
 
@@ -2001,10 +2206,12 @@ expat_default_handler(XMLParserObject* self, const XML_Char* data_in,
         else
             res = NULL;
         Py_XDECREF(res);
-    } else {
-        PyErr_Format(
-            PyExc_SyntaxError, "undefined entity &%s;: line %ld, column %ld",
-            PyString_AS_STRING(key),
+    } else if (!PyErr_Occurred()) {
+        /* Report the first error, not the last */
+        char message[128];
+        sprintf(message, "undefined entity &%.100s;", PyString_AS_STRING(key));
+        expat_set_error(
+            message,
             EXPAT(GetErrorLineNumber)(self->parser),
             EXPAT(GetErrorColumnNumber)(self->parser)
             );
@@ -2059,9 +2266,15 @@ expat_start_handler(XMLParserObject* self, const XML_Char* tag_in,
         /* shortcut */
         res = treebuilder_handle_start((TreeBuilderObject*) self->target,
                                        tag, attrib);
-    else if (self->handle_start)
+    else if (self->handle_start) {
+        if (attrib == Py_None) {
+            Py_DECREF(attrib);
+            attrib = PyDict_New();
+            if (!attrib)
+                return;
+        }
         res = PyObject_CallFunction(self->handle_start, "OO", tag, attrib);
-    else
+    } else
         res = NULL;
 
     Py_DECREF(tag);
@@ -2121,9 +2334,28 @@ static void
 expat_start_ns_handler(XMLParserObject* self, const XML_Char* prefix,
                        const XML_Char *uri)
 {
+    PyObject* sprefix = NULL;
+    PyObject* suri = NULL;
+
+    suri = makestring(uri, strlen(uri));
+    if (!suri)
+        return;
+
+    if (prefix)
+        sprefix = makestring(prefix, strlen(prefix));
+    else
+        sprefix = PyString_FromStringAndSize("", 0);
+    if (!sprefix) {
+        Py_DECREF(suri);
+        return;
+    }
+
     treebuilder_handle_namespace(
-        (TreeBuilderObject*) self->target, 1, prefix, uri
+        (TreeBuilderObject*) self->target, 1, sprefix, suri
         );
+
+    Py_DECREF(sprefix);
+    Py_DECREF(suri);
 }
 
 static void
@@ -2200,10 +2432,10 @@ expat_unknown_encoding_handler(XMLParserObject *self, const XML_Char *name,
     p = PyUnicode_AS_UNICODE(u);
 
     for (i = 0; i < 256; i++) {
-	if (p[i] != Py_UNICODE_REPLACEMENT_CHARACTER)
-	    info->map[i] = p[i];
+        if (p[i] != Py_UNICODE_REPLACEMENT_CHARACTER)
+            info->map[i] = p[i];
         else
-	    info->map[i] = -1;
+            info->map[i] = -1;
     }
 
     Py_DECREF(u);
@@ -2288,6 +2520,7 @@ xmlparser(PyObject* self_, PyObject* args, PyObject* kw)
     self->handle_end = PyObject_GetAttrString(target, "end");
     self->handle_comment = PyObject_GetAttrString(target, "comment");
     self->handle_pi = PyObject_GetAttrString(target, "pi");
+    self->handle_close = PyObject_GetAttrString(target, "close");
 
     PyErr_Clear();
 
@@ -2333,6 +2566,7 @@ xmlparser_dealloc(XMLParserObject* self)
 {
     EXPAT(ParserFree)(self->parser);
 
+    Py_XDECREF(self->handle_close);
     Py_XDECREF(self->handle_pi);
     Py_XDECREF(self->handle_comment);
     Py_XDECREF(self->handle_end);
@@ -2363,8 +2597,7 @@ expat_parse(XMLParserObject* self, char* data, int data_len, int final)
         return NULL;
 
     if (!ok) {
-        PyErr_Format(
-            PyExc_SyntaxError, "%s: line %ld, column %ld",
+        expat_set_error(
             EXPAT(ErrorString)(EXPAT(GetErrorCode)(self->parser)),
             EXPAT(GetErrorLineNumber)(self->parser),
             EXPAT(GetErrorColumnNumber)(self->parser)
@@ -2385,13 +2618,17 @@ xmlparser_close(XMLParserObject* self, PyObject* args)
         return NULL;
 
     res = expat_parse(self, "", 0, 1);
+    if (!res)
+        return NULL;
 
-    if (res && TreeBuilder_CheckExact(self->target)) {
+    if (TreeBuilder_CheckExact(self->target)) {
         Py_DECREF(res);
         return treebuilder_done((TreeBuilderObject*) self->target);
-    }
-
-    return res;
+    } if (self->handle_close) {
+        Py_DECREF(res);
+        return PyObject_CallFunction(self->handle_close, "");
+    } else
+        return res;
 }
 
 static PyObject*
@@ -2575,14 +2812,14 @@ xmlparser_getattr(XMLParserObject* self, char* name)
 
     res = Py_FindMethod(xmlparser_methods, (PyObject*) self, name);
     if (res)
-	return res;
+        return res;
 
     PyErr_Clear();
 
     if (strcmp(name, "entity") == 0)
-	res = self->entity;
+        res = self->entity;
     else if (strcmp(name, "target") == 0)
-	res = self->target;
+        res = self->target;
     else if (strcmp(name, "version") == 0) {
         char buffer[100];
         sprintf(buffer, "Expat %d.%d.%d", XML_MAJOR_VERSION,
@@ -2628,9 +2865,6 @@ init_elementtree(void)
     PyObject* m;
     PyObject* g;
     char* bootstrap;
-#if defined(USE_PYEXPAT_CAPI)
-    struct PyExpat_CAPI* capi;
-#endif
 
     /* Patch object type */
     Py_TYPE(&Element_Type) = Py_TYPE(&TreeBuilder_Type) = &PyType_Type;
@@ -2652,10 +2886,6 @@ init_elementtree(void)
 
     bootstrap = (
 
-#if (PY_VERSION_HEX >= 0x02020000 && PY_VERSION_HEX < 0x02030000)
-        "from __future__ import generators\n" /* enable yield under 2.2 */
-#endif
-
         "from copy import copy, deepcopy\n"
 
         "try:\n"
@@ -2673,11 +2903,14 @@ init_elementtree(void)
         "  def copyelement(elem):\n"
         "    return elem\n"
 
-        "def Comment(text=None):\n" /* public */
+        "class CommentProxy:\n"
+        " def __call__(self, text=None):\n"
         "  element = cElementTree.Element(ET.Comment)\n"
         "  element.text = text\n"
         "  return element\n"
-        "cElementTree.Comment = Comment\n"
+        " def __cmp__(self, other):\n"
+        "  return cmp(ET.Comment, other)\n"
+        "cElementTree.Comment = CommentProxy()\n"
 
         "class ElementTree(ET.ElementTree):\n" /* public */
         "  def parse(self, source, parser=None):\n"
@@ -2696,23 +2929,23 @@ init_elementtree(void)
         "    return self._root\n"
         "cElementTree.ElementTree = ElementTree\n"
 
-        "def getiterator(node, tag=None):\n" /* helper */
+        "def iter(node, tag=None):\n" /* helper */
         "  if tag == '*':\n"
         "    tag = None\n"
-#if (PY_VERSION_HEX < 0x02020000)
-        "  nodes = []\n" /* 2.1 doesn't have yield */
-        "  if tag is None or node.tag == tag:\n"
-        "    nodes.append(node)\n"
-        "  for node in node:\n"
-        "    nodes.extend(getiterator(node, tag))\n"
-        "  return nodes\n"
-#else
         "  if tag is None or node.tag == tag:\n"
         "    yield node\n"
         "  for node in node:\n"
-        "    for node in getiterator(node, tag):\n"
+        "    for node in iter(node, tag):\n"
         "      yield node\n"
-#endif
+
+        "def itertext(node):\n" /* helper */
+        "  if node.text:\n"
+        "    yield node.text\n"
+        "  for e in node:\n"
+        "    for s in e.itertext():\n"
+        "      yield s\n"
+        "    if e.tail:\n"
+        "      yield e.tail\n"
 
         "def parse(source, parser=None):\n" /* public */
         "  tree = ElementTree()\n"
@@ -2720,48 +2953,52 @@ init_elementtree(void)
         "  return tree\n"
         "cElementTree.parse = parse\n"
 
-#if (PY_VERSION_HEX < 0x02020000)
-        "if hasattr(ET, 'iterparse'):\n"
-        "    cElementTree.iterparse = ET.iterparse\n" /* delegate on 2.1 */
-#else
         "class iterparse(object):\n"
         " root = None\n"
         " def __init__(self, file, events=None):\n"
         "  if not hasattr(file, 'read'):\n"
         "    file = open(file, 'rb')\n"
         "  self._file = file\n"
-        "  self._events = events\n"
-        " def __iter__(self):\n" 
-        "  events = []\n"
+        "  self._events = []\n"
+        "  self._index = 0\n"
+        "  self.root = self._root = None\n"
         "  b = cElementTree.TreeBuilder()\n"
-        "  p = cElementTree.XMLParser(b)\n"
-        "  p._setevents(events, self._events)\n"
+        "  self._parser = cElementTree.XMLParser(b)\n"
+        "  self._parser._setevents(self._events, events)\n"
+        " def next(self):\n"
         "  while 1:\n"
-        "    data = self._file.read(16384)\n"
-        "    if not data:\n"
-        "      break\n"
-        "    p.feed(data)\n"
-        "    for event in events:\n"
-        "      yield event\n"
-        "    del events[:]\n"
-        "  root = p.close()\n"
-        "  for event in events:\n"
-        "    yield event\n"
-        "  self.root = root\n"
+        "    try:\n"
+        "      item = self._events[self._index]\n"
+        "    except IndexError:\n"
+        "      if self._parser is None:\n"
+        "        self.root = self._root\n"
+        "        raise StopIteration\n"
+        "      # load event buffer\n"
+        "      del self._events[:]\n"
+        "      self._index = 0\n"
+        "      data = self._file.read(16384)\n"
+        "      if data:\n"
+        "        self._parser.feed(data)\n"
+        "      else:\n"
+        "        self._root = self._parser.close()\n"
+        "        self._parser = None\n"
+        "    else:\n"
+        "      self._index = self._index + 1\n"
+        "      return item\n"
+        " def __iter__(self):\n"
+        "  return self\n"
         "cElementTree.iterparse = iterparse\n"
-#endif
 
-        "def PI(target, text=None):\n" /* public */
-        "  element = cElementTree.Element(ET.ProcessingInstruction)\n"
+        "class PIProxy:\n"
+        " def __call__(self, target, text=None):\n"
+        "  element = cElementTree.Element(ET.PI)\n"
         "  element.text = target\n"
         "  if text:\n"
         "    element.text = element.text + ' ' + text\n"
         "  return element\n"
-
-        "  elem = cElementTree.Element(ET.PI)\n"
-        "  elem.text = text\n"
-        "  return elem\n"
-        "cElementTree.PI = cElementTree.ProcessingInstruction = PI\n"
+        " def __cmp__(self, other):\n"
+        "  return cmp(ET.PI, other)\n"
+        "cElementTree.PI = cElementTree.ProcessingInstruction = PIProxy()\n"
 
         "def XML(text):\n" /* public */
         "  parser = cElementTree.XMLParser()\n"
@@ -2772,25 +3009,34 @@ init_elementtree(void)
         "def XMLID(text):\n" /* public */
         "  tree = XML(text)\n"
         "  ids = {}\n"
-        "  for elem in tree.getiterator():\n"
+        "  for elem in tree.iter():\n"
         "    id = elem.get('id')\n"
         "    if id:\n"
         "      ids[id] = elem\n"
         "  return tree, ids\n"
         "cElementTree.XMLID = XMLID\n"
 
+        "try:\n"
+        " register_namespace = ET.register_namespace\n"
+        "except AttributeError:\n"
+        " def register_namespace(prefix, uri):\n"
+        "  ET._namespace_map[uri] = prefix\n"
+        "cElementTree.register_namespace = register_namespace\n"
+
         "cElementTree.dump = ET.dump\n"
         "cElementTree.ElementPath = ElementPath = ET.ElementPath\n"
         "cElementTree.iselement = ET.iselement\n"
         "cElementTree.QName = ET.QName\n"
         "cElementTree.tostring = ET.tostring\n"
+        "cElementTree.fromstringlist = ET.fromstringlist\n"
+        "cElementTree.tostringlist = ET.tostringlist\n"
         "cElementTree.VERSION = '" VERSION "'\n"
         "cElementTree.__version__ = '" VERSION "'\n"
-        "cElementTree.XMLParserError = SyntaxError\n"
 
        );
 
-    PyRun_String(bootstrap, Py_file_input, g, NULL);
+    if (!PyRun_String(bootstrap, Py_file_input, g, NULL))
+        return;
 
     elementpath_obj = PyDict_GetItemString(g, "ElementPath");
 
@@ -2805,21 +3051,28 @@ init_elementtree(void)
             }
     } else
         PyErr_Clear();
+
     elementtree_deepcopy_obj = PyDict_GetItemString(g, "deepcopy");
-    elementtree_getiterator_obj = PyDict_GetItemString(g, "getiterator");
+    elementtree_iter_obj = PyDict_GetItemString(g, "iter");
+    elementtree_itertext_obj = PyDict_GetItemString(g, "itertext");
 
 #if defined(USE_PYEXPAT_CAPI)
     /* link against pyexpat, if possible */
-    capi = PyCObject_Import("pyexpat", "expat_CAPI");
-    if (capi &&
-        strcmp(capi->magic, PyExpat_CAPI_MAGIC) == 0 &&
-        capi->size <= sizeof(*expat_capi) &&
-        capi->MAJOR_VERSION == XML_MAJOR_VERSION &&
-        capi->MINOR_VERSION == XML_MINOR_VERSION &&
-        capi->MICRO_VERSION == XML_MICRO_VERSION)
-        expat_capi = capi;
-    else
-        expat_capi = NULL;
+    expat_capi = PyCObject_Import("pyexpat", "expat_CAPI");
+    if (expat_capi) {
+        /* check that it's usable */
+        if (strcmp(expat_capi->magic, PyExpat_CAPI_MAGIC) != 0 ||
+            expat_capi->size < sizeof(struct PyExpat_CAPI) ||
+            expat_capi->MAJOR_VERSION != XML_MAJOR_VERSION ||
+            expat_capi->MINOR_VERSION != XML_MINOR_VERSION ||
+            expat_capi->MICRO_VERSION != XML_MICRO_VERSION)
+            expat_capi = NULL;
+    }
 #endif
 
+    elementtree_parseerror_obj = PyErr_NewException(
+        "cElementTree.ParseError", PyExc_SyntaxError, NULL
+        );
+    Py_INCREF(elementtree_parseerror_obj);
+    PyModule_AddObject(m, "ParseError", elementtree_parseerror_obj);
 }