Update simplejson in third_party to v2.6.2

Now simplejson.loads supports loading into an OrderedDict.

Review URL: https://codereview.chromium.org/11420077

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168629 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 354 insertions, 131 deletions

diff --git a/third_party/simplejson/__init__.py b/third_party/simplejson/__init__.py
index 38d6229..fe2bd5a 100644
--- a/third_party/simplejson/__init__.py
+++ b/third_party/simplejson/__init__.py
@@ -1,99 +1,130 @@
-r"""
-A simple, fast, extensible JSON encoder and decoder
-
-JSON (JavaScript Object Notation) <http://json.org> is a subset of
+r"""JSON (JavaScript Object Notation) <http://json.org> is a subset of
 JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data
 interchange format.
 
-simplejson exposes an API familiar to uses of the standard library
-marshal and pickle modules.
+:mod:`simplejson` exposes an API familiar to users of the standard library
+:mod:`marshal` and :mod:`pickle` modules. It is the externally maintained
+version of the :mod:`json` library contained in Python 2.6, but maintains
+compatibility with Python 2.4 and Python 2.5 and (currently) has
+significant performance advantages, even without using the optional C
+extension for speedups.
 
 Encoding basic Python object hierarchies::
-    
-    >>> import simplejson
-    >>> simplejson.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])
+
+    >>> import simplejson as json
+    >>> json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])
     '["foo", {"bar": ["baz", null, 1.0, 2]}]'
-    >>> print simplejson.dumps("\"foo\bar")
+    >>> print json.dumps("\"foo\bar")
     "\"foo\bar"
-    >>> print simplejson.dumps(u'\u1234')
+    >>> print json.dumps(u'\u1234')
     "\u1234"
-    >>> print simplejson.dumps('\\')
+    >>> print json.dumps('\\')
     "\\"
-    >>> print simplejson.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)
+    >>> print json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)
     {"a": 0, "b": 0, "c": 0}
     >>> from StringIO import StringIO
     >>> io = StringIO()
-    >>> simplejson.dump(['streaming API'], io)
+    >>> json.dump(['streaming API'], io)
     >>> io.getvalue()
     '["streaming API"]'
 
 Compact encoding::
 
-    >>> import simplejson
-    >>> simplejson.dumps([1,2,3,{'4': 5, '6': 7}], separators=(',',':'))
+    >>> import simplejson as json
+    >>> json.dumps([1,2,3,{'4': 5, '6': 7}], separators=(',',':'))
     '[1,2,3,{"4":5,"6":7}]'
 
 Pretty printing::
 
-    >>> import simplejson
-    >>> print simplejson.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4)
+    >>> import simplejson as json
+    >>> s = json.dumps({'4': 5, '6': 7}, sort_keys=True, indent='    ')
+    >>> print '\n'.join([l.rstrip() for l in  s.splitlines()])
     {
-        "4": 5, 
+        "4": 5,
         "6": 7
     }
 
 Decoding JSON::
-    
-    >>> import simplejson
-    >>> simplejson.loads('["foo", {"bar":["baz", null, 1.0, 2]}]')
-    [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]
-    >>> simplejson.loads('"\\"foo\\bar"')
-    u'"foo\x08ar'
+
+    >>> import simplejson as json
+    >>> obj = [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]
+    >>> json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]') == obj
+    True
+    >>> json.loads('"\\"foo\\bar"') == u'"foo\x08ar'
+    True
     >>> from StringIO import StringIO
     >>> io = StringIO('["streaming API"]')
-    >>> simplejson.load(io)
-    [u'streaming API']
+    >>> json.load(io)[0] == 'streaming API'
+    True
 
 Specializing JSON object decoding::
 
-    >>> import simplejson
+    >>> import simplejson as json
     >>> def as_complex(dct):
     ...     if '__complex__' in dct:
     ...         return complex(dct['real'], dct['imag'])
     ...     return dct
-    ... 
-    >>> simplejson.loads('{"__complex__": true, "real": 1, "imag": 2}',
+    ...
+    >>> json.loads('{"__complex__": true, "real": 1, "imag": 2}',
     ...     object_hook=as_complex)
     (1+2j)
-
-Extending JSONEncoder::
-    
-    >>> import simplejson
-    >>> class ComplexEncoder(simplejson.JSONEncoder):
-    ...     def default(self, obj):
-    ...         if isinstance(obj, complex):
-    ...             return [obj.real, obj.imag]
-    ...         return simplejson.JSONEncoder.default(self, obj)
-    ... 
-    >>> dumps(2 + 1j, cls=ComplexEncoder)
+    >>> from decimal import Decimal
+    >>> json.loads('1.1', parse_float=Decimal) == Decimal('1.1')
+    True
+
+Specializing JSON object encoding::
+
+    >>> import simplejson as json
+    >>> def encode_complex(obj):
+    ...     if isinstance(obj, complex):
+    ...         return [obj.real, obj.imag]
+    ...     raise TypeError(repr(o) + " is not JSON serializable")
+    ...
+    >>> json.dumps(2 + 1j, default=encode_complex)
+    '[2.0, 1.0]'
+    >>> json.JSONEncoder(default=encode_complex).encode(2 + 1j)
     '[2.0, 1.0]'
-    >>> ComplexEncoder().encode(2 + 1j)
+    >>> ''.join(json.JSONEncoder(default=encode_complex).iterencode(2 + 1j))
     '[2.0, 1.0]'
-    >>> list(ComplexEncoder().iterencode(2 + 1j))
-    ['[', '2.0', ', ', '1.0', ']']
-    
 
-Note that the JSON produced by this module's default settings
-is a subset of YAML, so it may be used as a serializer for that as well.
+
+Using simplejson.tool from the shell to validate and pretty-print::
+
+    $ echo '{"json":"obj"}' | python -m simplejson.tool
+    {
+        "json": "obj"
+    }
+    $ echo '{ 1.2:3.4}' | python -m simplejson.tool
+    Expecting property name: line 1 column 2 (char 2)
 """
-__version__ = '1.7.3'
+__version__ = '2.6.2'
 __all__ = [
     'dump', 'dumps', 'load', 'loads',
-    'JSONDecoder', 'JSONEncoder',
+    'JSONDecoder', 'JSONDecodeError', 'JSONEncoder',
+    'OrderedDict', 'simple_first',
 ]
 
-from decoder import JSONDecoder
-from encoder import JSONEncoder
+__author__ = 'Bob Ippolito <bob@redivi.com>'
+
+from decimal import Decimal
+
+from decoder import JSONDecoder, JSONDecodeError
+from encoder import JSONEncoder, JSONEncoderForHTML
+def _import_OrderedDict():
+    import collections
+    try:
+        return collections.OrderedDict
+    except AttributeError:
+        import ordered_dict
+        return ordered_dict.OrderedDict
+OrderedDict = _import_OrderedDict()
+
+def _import_c_make_encoder():
+    try:
+        from simplejson._speedups import make_encoder
+        return make_encoder
+    except ImportError:
+        return None
 
 _default_encoder = JSONEncoder(
     skipkeys=False,
@@ -102,38 +133,49 @@ _default_encoder = JSONEncoder(
     allow_nan=True,
     indent=None,
     separators=None,
-    encoding='utf-8'
+    encoding='utf-8',
+    default=None,
+    use_decimal=True,
+    namedtuple_as_object=True,
+    tuple_as_array=True,
+    bigint_as_string=False,
+    item_sort_key=None,
 )
 
 def dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True,
         allow_nan=True, cls=None, indent=None, separators=None,
-        encoding='utf-8', **kw):
-    """
-    Serialize ``obj`` as a JSON formatted stream to ``fp`` (a
+        encoding='utf-8', default=None, use_decimal=True,
+        namedtuple_as_object=True, tuple_as_array=True,
+        bigint_as_string=False, sort_keys=False, item_sort_key=None,
+        **kw):
+    """Serialize ``obj`` as a JSON formatted stream to ``fp`` (a
     ``.write()``-supporting file-like object).
 
-    If ``skipkeys`` is ``True`` then ``dict`` keys that are not basic types
-    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``) 
+    If ``skipkeys`` is true then ``dict`` keys that are not basic types
+    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``)
     will be skipped instead of raising a ``TypeError``.
 
-    If ``ensure_ascii`` is ``False``, then the some chunks written to ``fp``
+    If ``ensure_ascii`` is false, then the some chunks written to ``fp``
     may be ``unicode`` instances, subject to normal Python ``str`` to
     ``unicode`` coercion rules. Unless ``fp.write()`` explicitly
     understands ``unicode`` (as in ``codecs.getwriter()``) this is likely
     to cause an error.
 
-    If ``check_circular`` is ``False``, then the circular reference check
+    If ``check_circular`` is false, then the circular reference check
     for container types will be skipped and a circular reference will
     result in an ``OverflowError`` (or worse).
 
-    If ``allow_nan`` is ``False``, then it will be a ``ValueError`` to
+    If ``allow_nan`` is false, then it will be a ``ValueError`` to
     serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``)
     in strict compliance of the JSON specification, instead of using the
     JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).
 
-    If ``indent`` is a non-negative integer, then JSON array elements and object
-    members will be pretty-printed with that indent level. An indent level
-    of 0 will only insert newlines. ``None`` is the most compact representation.
+    If *indent* is a string, then JSON array elements and object members
+    will be pretty-printed with a newline followed by that string repeated
+    for each level of nesting. ``None`` (the default) selects the most compact
+    representation without any newlines. For backwards compatibility with
+    versions of simplejson earlier than 2.1.0, an integer is also accepted
+    and is converted to a string with that many spaces.
 
     If ``separators`` is an ``(item_separator, dict_separator)`` tuple
     then it will be used instead of the default ``(', ', ': ')`` separators.
@@ -141,22 +183,59 @@ def dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True,
 
     ``encoding`` is the character encoding for str instances, default is UTF-8.
 
+    ``default(obj)`` is a function that should return a serializable version
+    of obj or raise TypeError. The default simply raises TypeError.
+
+    If *use_decimal* is true (default: ``True``) then decimal.Decimal
+    will be natively serialized to JSON with full precision.
+
+    If *namedtuple_as_object* is true (default: ``True``),
+    :class:`tuple` subclasses with ``_asdict()`` methods will be encoded
+    as JSON objects.
+
+    If *tuple_as_array* is true (default: ``True``),
+    :class:`tuple` (and subclasses) will be encoded as JSON arrays.
+
+    If *bigint_as_string* is true (default: ``False``), ints 2**53 and higher
+    or lower than -2**53 will be encoded as strings. This is to avoid the
+    rounding that happens in Javascript otherwise. Note that this is still a
+    lossy operation that will not round-trip correctly and should be used
+    sparingly.
+
+    If specified, *item_sort_key* is a callable used to sort the items in
+    each dictionary. This is useful if you want to sort items other than
+    in alphabetical order by key. This option takes precedence over
+    *sort_keys*.
+
+    If *sort_keys* is true (default: ``False``), the output of dictionaries
+    will be sorted by item.
+
     To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
     ``.default()`` method to serialize additional types), specify it with
     the ``cls`` kwarg.
+
     """
     # cached encoder
-    if (skipkeys is False and ensure_ascii is True and
-        check_circular is True and allow_nan is True and
+    if (not skipkeys and ensure_ascii and
+        check_circular and allow_nan and
         cls is None and indent is None and separators is None and
-        encoding == 'utf-8' and not kw):
+        encoding == 'utf-8' and default is None and use_decimal
+        and namedtuple_as_object and tuple_as_array
+        and not bigint_as_string and not item_sort_key and not kw):
         iterable = _default_encoder.iterencode(obj)
     else:
         if cls is None:
             cls = JSONEncoder
         iterable = cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii,
             check_circular=check_circular, allow_nan=allow_nan, indent=indent,
-            separators=separators, encoding=encoding, **kw).iterencode(obj)
+            separators=separators, encoding=encoding,
+            default=default, use_decimal=use_decimal,
+            namedtuple_as_object=namedtuple_as_object,
+            tuple_as_array=tuple_as_array,
+            bigint_as_string=bigint_as_string,
+            sort_keys=sort_keys,
+            item_sort_key=item_sort_key,
+            **kw).iterencode(obj)
     # could accelerate with writelines in some versions of Python, at
     # a debuggability cost
     for chunk in iterable:
@@ -165,31 +244,35 @@ def dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True,
 
 def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
         allow_nan=True, cls=None, indent=None, separators=None,
-        encoding='utf-8', **kw):
-    """
-    Serialize ``obj`` to a JSON formatted ``str``.
-
-    If ``skipkeys`` is ``True`` then ``dict`` keys that are not basic types
-    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``) 
+        encoding='utf-8', default=None, use_decimal=True,
+        namedtuple_as_object=True, tuple_as_array=True,
+        bigint_as_string=False, sort_keys=False, item_sort_key=None,
+        **kw):
+    """Serialize ``obj`` to a JSON formatted ``str``.
+
+    If ``skipkeys`` is false then ``dict`` keys that are not basic types
+    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``)
     will be skipped instead of raising a ``TypeError``.
 
-    If ``ensure_ascii`` is ``False``, then the return value will be a
+    If ``ensure_ascii`` is false, then the return value will be a
     ``unicode`` instance subject to normal Python ``str`` to ``unicode``
     coercion rules instead of being escaped to an ASCII ``str``.
 
-    If ``check_circular`` is ``False``, then the circular reference check
+    If ``check_circular`` is false, then the circular reference check
     for container types will be skipped and a circular reference will
     result in an ``OverflowError`` (or worse).
 
-    If ``allow_nan`` is ``False``, then it will be a ``ValueError`` to
+    If ``allow_nan`` is false, then it will be a ``ValueError`` to
     serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in
     strict compliance of the JSON specification, instead of using the
     JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).
 
-    If ``indent`` is a non-negative integer, then JSON array elements and
-    object members will be pretty-printed with that indent level. An indent
-    level of 0 will only insert newlines. ``None`` is the most compact
-    representation.
+    If ``indent`` is a string, then JSON array elements and object members
+    will be pretty-printed with a newline followed by that string repeated
+    for each level of nesting. ``None`` (the default) selects the most compact
+    representation without any newlines. For backwards compatibility with
+    versions of simplejson earlier than 2.1.0, an integer is also accepted
+    and is converted to a string with that many spaces.
 
     If ``separators`` is an ``(item_separator, dict_separator)`` tuple
     then it will be used instead of the default ``(', ', ': ')`` separators.
@@ -197,91 +280,231 @@ def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
 
     ``encoding`` is the character encoding for str instances, default is UTF-8.
 
+    ``default(obj)`` is a function that should return a serializable version
+    of obj or raise TypeError. The default simply raises TypeError.
+
+    If *use_decimal* is true (default: ``True``) then decimal.Decimal
+    will be natively serialized to JSON with full precision.
+
+    If *namedtuple_as_object* is true (default: ``True``),
+    :class:`tuple` subclasses with ``_asdict()`` methods will be encoded
+    as JSON objects.
+
+    If *tuple_as_array* is true (default: ``True``),
+    :class:`tuple` (and subclasses) will be encoded as JSON arrays.
+
+    If *bigint_as_string* is true (not the default), ints 2**53 and higher
+    or lower than -2**53 will be encoded as strings. This is to avoid the
+    rounding that happens in Javascript otherwise.
+
+    If specified, *item_sort_key* is a callable used to sort the items in
+    each dictionary. This is useful if you want to sort items other than
+    in alphabetical order by key. This option takes precendence over
+    *sort_keys*.
+
+    If *sort_keys* is true (default: ``False``), the output of dictionaries
+    will be sorted by item.
+
     To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
     ``.default()`` method to serialize additional types), specify it with
     the ``cls`` kwarg.
+
     """
     # cached encoder
-    if (skipkeys is False and ensure_ascii is True and
-        check_circular is True and allow_nan is True and
+    if (not skipkeys and ensure_ascii and
+        check_circular and allow_nan and
         cls is None and indent is None and separators is None and
-        encoding == 'utf-8' and not kw):
+        encoding == 'utf-8' and default is None and use_decimal
+        and namedtuple_as_object and tuple_as_array
+        and not bigint_as_string and not sort_keys
+        and not item_sort_key and not kw):
         return _default_encoder.encode(obj)
     if cls is None:
         cls = JSONEncoder
     return cls(
         skipkeys=skipkeys, ensure_ascii=ensure_ascii,
         check_circular=check_circular, allow_nan=allow_nan, indent=indent,
-        separators=separators, encoding=encoding,
+        separators=separators, encoding=encoding, default=default,
+        use_decimal=use_decimal,
+        namedtuple_as_object=namedtuple_as_object,
+        tuple_as_array=tuple_as_array,
+        bigint_as_string=bigint_as_string,
+        sort_keys=sort_keys,
+        item_sort_key=item_sort_key,
         **kw).encode(obj)
 
-_default_decoder = JSONDecoder(encoding=None, object_hook=None)
 
-def load(fp, encoding=None, cls=None, object_hook=None, **kw):
-    """
-    Deserialize ``fp`` (a ``.read()``-supporting file-like object containing
+_default_decoder = JSONDecoder(encoding=None, object_hook=None,
+                               object_pairs_hook=None)
+
+
+def load(fp, encoding=None, cls=None, object_hook=None, parse_float=None,
+        parse_int=None, parse_constant=None, object_pairs_hook=None,
+        use_decimal=False, namedtuple_as_object=True, tuple_as_array=True,
+        **kw):
+    """Deserialize ``fp`` (a ``.read()``-supporting file-like object containing
     a JSON document) to a Python object.
 
-    If the contents of ``fp`` is encoded with an ASCII based encoding other
-    than utf-8 (e.g. latin-1), then an appropriate ``encoding`` name must
-    be specified. Encodings that are not ASCII based (such as UCS-2) are
-    not allowed, and should be wrapped with
-    ``codecs.getreader(fp)(encoding)``, or simply decoded to a ``unicode``
-    object and passed to ``loads()``
-
-    ``object_hook`` is an optional function that will be called with the
-    result of any object literal decode (a ``dict``). The return value of
-    ``object_hook`` will be used instead of the ``dict``. This feature
-    can be used to implement custom decoders (e.g. JSON-RPC class hinting).
-    
+    *encoding* determines the encoding used to interpret any
+    :class:`str` objects decoded by this instance (``'utf-8'`` by
+    default).  It has no effect when decoding :class:`unicode` objects.
+
+    Note that currently only encodings that are a superset of ASCII work,
+    strings of other encodings should be passed in as :class:`unicode`.
+
+    *object_hook*, if specified, will be called with the result of every
+    JSON object decoded and its return value will be used in place of the
+    given :class:`dict`.  This can be used to provide custom
+    deserializations (e.g. to support JSON-RPC class hinting).
+
+    *object_pairs_hook* is an optional function that will be called with
+    the result of any object literal decode with an ordered list of pairs.
+    The return value of *object_pairs_hook* will be used instead of the
+    :class:`dict`.  This feature can be used to implement custom decoders
+    that rely on the order that the key and value pairs are decoded (for
+    example, :func:`collections.OrderedDict` will remember the order of
+    insertion). If *object_hook* is also defined, the *object_pairs_hook*
+    takes priority.
+
+    *parse_float*, if specified, will be called with the string of every
+    JSON float to be decoded.  By default, this is equivalent to
+    ``float(num_str)``. This can be used to use another datatype or parser
+    for JSON floats (e.g. :class:`decimal.Decimal`).
+
+    *parse_int*, if specified, will be called with the string of every
+    JSON int to be decoded.  By default, this is equivalent to
+    ``int(num_str)``.  This can be used to use another datatype or parser
+    for JSON integers (e.g. :class:`float`).
+
+    *parse_constant*, if specified, will be called with one of the
+    following strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``.  This
+    can be used to raise an exception if invalid JSON numbers are
+    encountered.
+
+    If *use_decimal* is true (default: ``False``) then it implies
+    parse_float=decimal.Decimal for parity with ``dump``.
+
     To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
     kwarg.
+
     """
     return loads(fp.read(),
-        encoding=encoding, cls=cls, object_hook=object_hook, **kw)
+        encoding=encoding, cls=cls, object_hook=object_hook,
+        parse_float=parse_float, parse_int=parse_int,
+        parse_constant=parse_constant, object_pairs_hook=object_pairs_hook,
+        use_decimal=use_decimal, **kw)
 
-def loads(s, encoding=None, cls=None, object_hook=None, **kw):
-    """
-    Deserialize ``s`` (a ``str`` or ``unicode`` instance containing a JSON
-    document) to a Python object.
 
-    If ``s`` is a ``str`` instance and is encoded with an ASCII based encoding
-    other than utf-8 (e.g. latin-1) then an appropriate ``encoding`` name
-    must be specified. Encodings that are not ASCII based (such as UCS-2)
-    are not allowed and should be decoded to ``unicode`` first.
+def loads(s, encoding=None, cls=None, object_hook=None, parse_float=None,
+        parse_int=None, parse_constant=None, object_pairs_hook=None,
+        use_decimal=False, **kw):
+    """Deserialize ``s`` (a ``str`` or ``unicode`` instance containing a JSON
+    document) to a Python object.
 
-    ``object_hook`` is an optional function that will be called with the
-    result of any object literal decode (a ``dict``). The return value of
-    ``object_hook`` will be used instead of the ``dict``. This feature
-    can be used to implement custom decoders (e.g. JSON-RPC class hinting).
+    *encoding* determines the encoding used to interpret any
+    :class:`str` objects decoded by this instance (``'utf-8'`` by
+    default).  It has no effect when decoding :class:`unicode` objects.
+
+    Note that currently only encodings that are a superset of ASCII work,
+    strings of other encodings should be passed in as :class:`unicode`.
+
+    *object_hook*, if specified, will be called with the result of every
+    JSON object decoded and its return value will be used in place of the
+    given :class:`dict`.  This can be used to provide custom
+    deserializations (e.g. to support JSON-RPC class hinting).
+
+    *object_pairs_hook* is an optional function that will be called with
+    the result of any object literal decode with an ordered list of pairs.
+    The return value of *object_pairs_hook* will be used instead of the
+    :class:`dict`.  This feature can be used to implement custom decoders
+    that rely on the order that the key and value pairs are decoded (for
+    example, :func:`collections.OrderedDict` will remember the order of
+    insertion). If *object_hook* is also defined, the *object_pairs_hook*
+    takes priority.
+
+    *parse_float*, if specified, will be called with the string of every
+    JSON float to be decoded.  By default, this is equivalent to
+    ``float(num_str)``. This can be used to use another datatype or parser
+    for JSON floats (e.g. :class:`decimal.Decimal`).
+
+    *parse_int*, if specified, will be called with the string of every
+    JSON int to be decoded.  By default, this is equivalent to
+    ``int(num_str)``.  This can be used to use another datatype or parser
+    for JSON integers (e.g. :class:`float`).
+
+    *parse_constant*, if specified, will be called with one of the
+    following strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``.  This
+    can be used to raise an exception if invalid JSON numbers are
+    encountered.
+
+    If *use_decimal* is true (default: ``False``) then it implies
+    parse_float=decimal.Decimal for parity with ``dump``.
 
     To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
     kwarg.
+
     """
-    if cls is None and encoding is None and object_hook is None and not kw:
+    if (cls is None and encoding is None and object_hook is None and
+            parse_int is None and parse_float is None and
+            parse_constant is None and object_pairs_hook is None
+            and not use_decimal and not kw):
         return _default_decoder.decode(s)
     if cls is None:
         cls = JSONDecoder
     if object_hook is not None:
         kw['object_hook'] = object_hook
+    if object_pairs_hook is not None:
+        kw['object_pairs_hook'] = object_pairs_hook
+    if parse_float is not None:
+        kw['parse_float'] = parse_float
+    if parse_int is not None:
+        kw['parse_int'] = parse_int
+    if parse_constant is not None:
+        kw['parse_constant'] = parse_constant
+    if use_decimal:
+        if parse_float is not None:
+            raise TypeError("use_decimal=True implies parse_float=Decimal")
+        kw['parse_float'] = Decimal
     return cls(encoding=encoding, **kw).decode(s)
 
-def read(s):
-    """
-    json-py API compatibility hook. Use loads(s) instead.
-    """
-    import warnings
-    warnings.warn("simplejson.loads(s) should be used instead of read(s)",
-        DeprecationWarning)
-    return loads(s)
 
-def write(obj):
-    """
-    json-py API compatibility hook. Use dumps(s) instead.
+def _toggle_speedups(enabled):
+    import simplejson.decoder as dec
+    import simplejson.encoder as enc
+    import simplejson.scanner as scan
+    c_make_encoder = _import_c_make_encoder()
+    if enabled:
+        dec.scanstring = dec.c_scanstring or dec.py_scanstring
+        enc.c_make_encoder = c_make_encoder
+        enc.encode_basestring_ascii = (enc.c_encode_basestring_ascii or
+            enc.py_encode_basestring_ascii)
+        scan.make_scanner = scan.c_make_scanner or scan.py_make_scanner
+    else:
+        dec.scanstring = dec.py_scanstring
+        enc.c_make_encoder = None
+        enc.encode_basestring_ascii = enc.py_encode_basestring_ascii
+        scan.make_scanner = scan.py_make_scanner
+    dec.make_scanner = scan.make_scanner
+    global _default_decoder
+    _default_decoder = JSONDecoder(
+        encoding=None,
+        object_hook=None,
+        object_pairs_hook=None,
+    )
+    global _default_encoder
+    _default_encoder = JSONEncoder(
+       skipkeys=False,
+       ensure_ascii=True,
+       check_circular=True,
+       allow_nan=True,
+       indent=None,
+       separators=None,
+       encoding='utf-8',
+       default=None,
+   )
+
+def simple_first(kv):
+    """Helper function to pass to item_sort_key to sort simple
+    elements to the top, then container elements.
     """
-    import warnings
-    warnings.warn("simplejson.dumps(s) should be used instead of write(s)",
-        DeprecationWarning)
-    return dumps(obj)
-
-
+    return (isinstance(kv[1], (list, dict, tuple)), kv[0])