diff options
Diffstat (limited to 'Modules/cPickle.c')
| -rw-r--r-- | Modules/cPickle.c | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/Modules/cPickle.c b/Modules/cPickle.c index 6f09c17..c8b194b 100644 --- a/Modules/cPickle.c +++ b/Modules/cPickle.c @@ -109,6 +109,9 @@ static PyObject *inverted_registry; /* copy_reg._extension_cache, {code: object} */ static PyObject *extension_cache; +/* For looking up name pairs in copy_reg._extension_registry. */ +static PyObject *two_tuple; + static PyObject *__class___str, *__getinitargs___str, *__dict___str, *__getstate___str, *__setstate___str, *__name___str, *__reduce___str, *write_str, *append_str, @@ -1931,12 +1934,70 @@ save_global(Picklerobject *self, PyObject *args, PyObject *name) if (klass != args) { Py_DECREF(klass); cPickle_ErrFormat(PicklingError, - "Can't pickle %s: it's not the same object as %s.%s", + "Can't pickle %s: it's not the same object " + "as %s.%s", "OSS", args, module, global_name); goto finally; } Py_DECREF(klass); + if (self->proto >= 2) { + /* See whether this is in the extension registry, and if + * so generate an EXT opcode. + */ + PyObject *py_code; /* extension code as Python object */ + long code; /* extensoin code as C value */ + char c_str[5]; + int n; + + PyTuple_SET_ITEM(two_tuple, 0, module); + PyTuple_SET_ITEM(two_tuple, 1, global_name); + py_code = PyDict_GetItem(extension_registry, two_tuple); + if (py_code == NULL) + goto gen_global; /* not registered */ + + /* Verify py_code has the right type and value. */ + if (!PyInt_Check(py_code)) { + cPickle_ErrFormat(PicklingError, "Can't pickle %s: " + "extension code %s isn't n integer", + "OO", args, py_code); + goto finally; + } + code = PyInt_AS_LONG(py_code); + if (code <= 0 || code > 0x7fffffffL) { + cPickle_ErrFormat(PicklingError, "Can't pickle %s: " + "extension code %ld is out of range", + "Ol", args, code); + goto finally; + } + + /* Generate an EXT opcode. */ + if (code <= 0xff) { + c_str[0] = EXT1; + c_str[1] = (char)code; + n = 2; + } + else if (code <= 0xffff) { + c_str[0] = EXT2; + c_str[1] = (char)(code & 0xff); + c_str[2] = (char)((code >> 8) & 0xff); + n = 3; + } + else { + c_str[0] = EXT4; + c_str[1] = (char)(code & 0xff); + c_str[2] = (char)((code >> 8) & 0xff); + c_str[3] = (char)((code >> 16) & 0xff); + c_str[4] = (char)((code >> 24) & 0xff); + n = 5; + } + + if (self->write_func(self, c_str, n) >= 0) + res = 0; + goto finally; /* and don't memoize */ + } + + gen_global: if (self->write_func(self, &global, 1) < 0) goto finally; @@ -5213,7 +5274,11 @@ init_stuff(PyObject *module_dict) Py_DECREF(copy_reg); - if (!( empty_tuple = PyTuple_New(0))) + if (!(empty_tuple = PyTuple_New(0))) + return -1; + + two_tuple = PyTuple_New(2); + if (two_tuple == NULL) return -1; /* Ugh */ |