Merge branch 'undingen-codecs'

Makefile

@@ -291,7 +291,7 @@ STDLIB_OBJS := stdlib.bc.o stdlib.stripped.bc.o
 STDLIB_RELEASE_OBJS := stdlib.release.bc.o
 ASM_SRCS := $(wildcard src/runtime/*.S)
 
-STDMODULE_SRCS := errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c pwdmodule.c posixmodule.c _struct.c datetimemodule.c _functoolsmodule.c _collectionsmodule.c itertoolsmodule.c resource.c signalmodule.c selectmodule.c fcntlmodule.c timemodule.c arraymodule.c zlibmodule.c $(EXTRA_STDMODULE_SRCS)
+STDMODULE_SRCS := errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c pwdmodule.c posixmodule.c _struct.c datetimemodule.c _functoolsmodule.c _collectionsmodule.c itertoolsmodule.c resource.c signalmodule.c selectmodule.c fcntlmodule.c timemodule.c arraymodule.c zlibmodule.c _codecsmodule.c $(EXTRA_STDMODULE_SRCS)
 STDOBJECT_SRCS := structseq.c capsule.c stringobject.c $(EXTRA_STDOBJECT_SRCS)
 STDPYTHON_SRCS := pyctype.c getargs.c formatter_string.c pystrtod.c dtoa.c $(EXTRA_STDPYTHON_SRCS)
 FROM_CPYTHON_SRCS := $(addprefix from_cpython/Modules/,$(STDMODULE_SRCS)) $(addprefix from_cpython/Objects/,$(STDOBJECT_SRCS)) $(addprefix from_cpython/Python/,$(STDPYTHON_SRCS))

from_cpython/CMakeLists.txt

@@ -15,7 +15,7 @@ endforeach(STDLIB_FILE)
 add_custom_target(copy_stdlib ALL DEPENDS ${STDLIB_TARGETS})
 
 # compile specified files in from_cpython/Modules
-file(GLOB_RECURSE STDMODULE_SRCS Modules errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c pwdmodule.c posixmodule.c _struct.c datetimemodule.c _functoolsmodule.c _collectionsmodule.c itertoolsmodule.c resource.c signalmodule.c selectmodule.c fcntlmodule.c timemodule.c arraymodule.c zlibmodule.c)
+file(GLOB_RECURSE STDMODULE_SRCS Modules errnomodule.c shamodule.c sha256module.c sha512module.c _math.c mathmodule.c md5.c md5module.c _randommodule.c _sre.c operator.c binascii.c pwdmodule.c posixmodule.c _struct.c datetimemodule.c _functoolsmodule.c _collectionsmodule.c itertoolsmodule.c resource.c signalmodule.c selectmodule.c fcntlmodule.c timemodule.c arraymodule.c zlibmodule.c _codecsmodule.c)
 
 # compile specified files in from_cpython/Objects
 file(GLOB_RECURSE STDOBJECT_SRCS Objects structseq.c capsule.c stringobject.c)

from_cpython/Include/Python.h

@@ -72,6 +72,7 @@
 #include "descrobject.h"
 #include "warnings.h"
 
+#include "codecs.h"
 #include "pyerrors.h"
 
 #include "pystate.h"

from_cpython/Include/abstract.h

@@ -326,7 +326,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
        */
 
      PyAPI_FUNC(PyObject *) PyObject_CallFunction(PyObject *callable_object,
-                                                 char *format, ...) PYSTON_NOEXCEPT;
+                                                 const char *format, ...) PYSTON_NOEXCEPT;
 
        /*
      Call a callable Python object, callable_object, with a
@@ -339,8 +339,8 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
        */
 
 
-     PyAPI_FUNC(PyObject *) PyObject_CallMethod(PyObject *o, char *m,
-                                               char *format, ...) PYSTON_NOEXCEPT;
+     PyAPI_FUNC(PyObject *) PyObject_CallMethod(PyObject *o, const char *m,
+                                               const char *format, ...) PYSTON_NOEXCEPT;
 
        /*
      Call the method named m of object o with a variable number of
@@ -352,10 +352,10 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
        */
 
      PyAPI_FUNC(PyObject *) _PyObject_CallFunction_SizeT(PyObject *callable,
-                                                         char *format, ...) PYSTON_NOEXCEPT;
+                                                         const char *format, ...) PYSTON_NOEXCEPT;
      PyAPI_FUNC(PyObject *) _PyObject_CallMethod_SizeT(PyObject *o,
-                                                       char *name,
-                                                       char *format, ...) PYSTON_NOEXCEPT;
+                                                       const char *name,
+                                                       const char *format, ...) PYSTON_NOEXCEPT;
 
      PyAPI_FUNC(PyObject *) PyObject_CallFunctionObjArgs(PyObject *callable,
                                                         ...) PYSTON_NOEXCEPT;

from_cpython/Include/codecs.h

+// This file is originally from CPython 2.7, with modifications for Pyston
+
+#ifndef Py_CODECREGISTRY_H
+#define Py_CODECREGISTRY_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* ------------------------------------------------------------------------
+
+   Python Codec Registry and support functions
+
+
+Written by Marc-Andre Lemburg (mal@lemburg.com).
+
+Copyright (c) Corporation for National Research Initiatives.
+
+   ------------------------------------------------------------------------ */
+
+/* Register a new codec search function.
+
+   As side effect, this tries to load the encodings package, if not
+   yet done, to make sure that it is always first in the list of
+   search functions.
+
+   The search_function's refcount is incremented by this function. */
+
+PyAPI_FUNC(int) PyCodec_Register(PyObject *search_function) PYSTON_NOEXCEPT;
+
+/* Codec register lookup API.
+
+   Looks up the given encoding and returns a CodecInfo object with
+   function attributes which implement the different aspects of
+   processing the encoding.
+
+   The encoding string is looked up converted to all lower-case
+   characters. This makes encodings looked up through this mechanism
+   effectively case-insensitive.
+
+   If no codec is found, a KeyError is set and NULL returned.
+
+   As side effect, this tries to load the encodings package, if not
+   yet done. This is part of the lazy load strategy for the encodings
+   package.
+
+ */
+
+PyAPI_FUNC(PyObject *) _PyCodec_Lookup(const char *encoding) PYSTON_NOEXCEPT;
+
+/* Generic codec based encoding API.
+
+   object is passed through the encoder function found for the given
+   encoding using the error handling method defined by errors. errors
+   may be NULL to use the default method defined for the codec.
+   
+   Raises a LookupError in case no encoder can be found.
+
+ */
+
+PyAPI_FUNC(PyObject *) PyCodec_Encode(PyObject *object, const char *encoding, const char *errors) PYSTON_NOEXCEPT;
+
+/* Generic codec based decoding API.
+
+   object is passed through the decoder function found for the given
+   encoding using the error handling method defined by errors. errors
+   may be NULL to use the default method defined for the codec.
+   
+   Raises a LookupError in case no encoder can be found.
+
+ */
+
+PyAPI_FUNC(PyObject *) PyCodec_Decode(PyObject *object, const char *encoding, const char *errors) PYSTON_NOEXCEPT;
+
+/* --- Codec Lookup APIs -------------------------------------------------- 
+
+   All APIs return a codec object with incremented refcount and are
+   based on _PyCodec_Lookup().  The same comments w/r to the encoding
+   name also apply to these APIs.
+
+*/
+
+/* Get an encoder function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_Encoder(const char *encoding) PYSTON_NOEXCEPT;
+
+/* Get a decoder function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_Decoder(const char *encoding) PYSTON_NOEXCEPT;
+
+/* Get a IncrementalEncoder object for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_IncrementalEncoder(const char *encoding, const char *errors) PYSTON_NOEXCEPT;
+
+/* Get a IncrementalDecoder object function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_IncrementalDecoder(const char *encoding, const char *errors) PYSTON_NOEXCEPT;
+
+/* Get a StreamReader factory function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_StreamReader(const char *encoding, PyObject *stream,
+                                            const char *errors) PYSTON_NOEXCEPT;
+
+/* Get a StreamWriter factory function for the given encoding. */
+
+PyAPI_FUNC(PyObject *) PyCodec_StreamWriter(const char *encoding, PyObject *stream,
+                                            const char *errors) PYSTON_NOEXCEPT;
+
+/* Unicode encoding error handling callback registry API */
+
+/* Register the error handling callback function error under the given
+   name. This function will be called by the codec when it encounters
+   unencodable characters/undecodable bytes and doesn't know the
+   callback name, when name is specified as the error parameter
+   in the call to the encode/decode function.
+   Return 0 on success, -1 on error */
+PyAPI_FUNC(int) PyCodec_RegisterError(const char *name, PyObject *error) PYSTON_NOEXCEPT;
+
+/* Lookup the error handling callback function registered under the given
+   name. As a special case NULL can be passed, in which case
+   the error handling callback for "strict" will be returned. */
+PyAPI_FUNC(PyObject *) PyCodec_LookupError(const char *name) PYSTON_NOEXCEPT;
+
+/* raise exc as an exception */
+PyAPI_FUNC(PyObject *) PyCodec_StrictErrors(PyObject *exc) PYSTON_NOEXCEPT;
+
+/* ignore the unicode error, skipping the faulty input */
+PyAPI_FUNC(PyObject *) PyCodec_IgnoreErrors(PyObject *exc) PYSTON_NOEXCEPT;
+
+/* replace the unicode encode error with ? or U+FFFD */
+PyAPI_FUNC(PyObject *) PyCodec_ReplaceErrors(PyObject *exc) PYSTON_NOEXCEPT;
+
+/* replace the unicode encode error with XML character references */
+PyAPI_FUNC(PyObject *) PyCodec_XMLCharRefReplaceErrors(PyObject *exc) PYSTON_NOEXCEPT;
+
+/* replace the unicode encode error with backslash escapes (\x, \u and \U) */
+PyAPI_FUNC(PyObject *) PyCodec_BackslashReplaceErrors(PyObject *exc) PYSTON_NOEXCEPT;
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_CODECREGISTRY_H */

from_cpython/Include/import.h

@@ -9,14 +9,14 @@ extern "C" {
 #endif
 
 PyAPI_FUNC(long) PyImport_GetMagicNumber(void) PYSTON_NOEXCEPT;
-PyAPI_FUNC(PyObject *) PyImport_ExecCodeModule(char *name, PyObject *co) PYSTON_NOEXCEPT;
+PyAPI_FUNC(PyObject *) PyImport_ExecCodeModule(const char *name, PyObject *co) PYSTON_NOEXCEPT;
 PyAPI_FUNC(PyObject *) PyImport_ExecCodeModuleEx(
 	char *name, PyObject *co, char *pathname) PYSTON_NOEXCEPT;
 PyAPI_FUNC(PyObject *) PyImport_GetModuleDict(void) PYSTON_NOEXCEPT;
 PyAPI_FUNC(PyObject *) PyImport_AddModule(const char *name) PYSTON_NOEXCEPT;
 PyAPI_FUNC(PyObject *) PyImport_ImportModule(const char *name) PYSTON_NOEXCEPT;
 PyAPI_FUNC(PyObject *) PyImport_ImportModuleNoBlock(const char *) PYSTON_NOEXCEPT;
-PyAPI_FUNC(PyObject *) PyImport_ImportModuleLevel(char *name,
+PyAPI_FUNC(PyObject *) PyImport_ImportModuleLevel(const char *name,
 	PyObject *globals, PyObject *locals, PyObject *fromlist, int level) PYSTON_NOEXCEPT;
 
 #define PyImport_ImportModuleEx(n, g, l, f) \

from_cpython/Include/unicodeobject.h

@@ -986,7 +986,7 @@ PyObject *_PyUnicode_DecodeUnicodeInternal(
     const char *string,
     Py_ssize_t length,
     const char *errors
-    );
+    ) PYSTON_NOEXCEPT;
 
 /* --- Latin-1 Codecs -----------------------------------------------------
 

from_cpython/Lib/encodings/__init__.py

@@ -43,7 +43,9 @@ _norm_encoding_map = ('                                              . '
                       '                ')
 _aliases = aliases.aliases
 
-class CodecRegistryError(LookupError, SystemError):
+# Pyston change: we don't support multiple inheritance yet
+#class CodecRegistryError(LookupError, SystemError):
+class CodecRegistryError(LookupError):
     pass
 
 def normalize_encoding(encoding):

src/capi/abstract.cpp

@@ -300,6 +300,10 @@ extern "C" PyObject* PyObject_CallObject(PyObject* obj, PyObject* args) noexcept
     }
 }
 
+extern "C" int PyObject_AsReadBuffer(PyObject* obj, const void** buffer, Py_ssize_t* buffer_len) noexcept {
+    Py_FatalError("unimplemented");
+}
+
 static PyObject* call_function_tail(PyObject* callable, PyObject* args) {
     PyObject* retval;
 
@@ -324,11 +328,11 @@ static PyObject* call_function_tail(PyObject* callable, PyObject* args) {
     return retval;
 }
 
-extern "C" PyObject* PyObject_CallMethod(PyObject* o, char* name, char* format, ...) noexcept {
+extern "C" PyObject* PyObject_CallMethod(PyObject* o, const char* name, const char* format, ...) noexcept {
     Py_FatalError("unimplemented");
 }
 
-extern "C" PyObject* _PyObject_CallMethod_SizeT(PyObject* o, char* name, char* format, ...) noexcept {
+extern "C" PyObject* _PyObject_CallMethod_SizeT(PyObject* o, const char* name, const char* format, ...) noexcept {
     // TODO it looks like this could be made much more efficient by calling our callattr(), but
     // I haven't taken the time to verify that that has the same behavior
 
@@ -464,7 +468,7 @@ extern "C" int PyObject_IsSubclass(PyObject* derived, PyObject* cls) noexcept {
     return recursive_issubclass(derived, cls);
 }
 
-extern "C" PyObject* _PyObject_CallFunction_SizeT(PyObject* callable, char* format, ...) noexcept {
+extern "C" PyObject* _PyObject_CallFunction_SizeT(PyObject* callable, const char* format, ...) noexcept {
     Py_FatalError("unimplemented");
 }
 
@@ -615,7 +619,7 @@ extern "C" PyObject* PySequence_List(PyObject* v) noexcept {
     return result;
 }
 
-extern "C" PyObject* PyObject_CallFunction(PyObject* callable, char* format, ...) noexcept {
+extern "C" PyObject* PyObject_CallFunction(PyObject* callable, const char* format, ...) noexcept {
     Py_FatalError("unimplemented");
 }
 

src/capi/modsupport.cpp

@@ -97,6 +97,14 @@ static PyObject* do_mkvalue(const char** p_format, va_list* p_va, int flags) noe
             case 'H':
                 return PyInt_FromLong((long)va_arg(*p_va, unsigned int));
 
+            case 'n':
+#if SIZEOF_SIZE_T != SIZEOF_LONG
+                return PyInt_FromSsize_t(va_arg(*p_va, Py_ssize_t));
+#endif
+            /* Fall through from 'n' to 'l' if Py_ssize_t is long */
+            case 'l':
+                return PyInt_FromLong(va_arg(*p_va, long));
+
             case 'N':
             case 'S':
             case 'O':

src/runtime/builtin_modules/builtins.cpp

@@ -442,12 +442,22 @@ Box* issubclass_func(Box* child, Box* parent) {
     return boxBool(isSubclass(static_cast<BoxedClass*>(child), static_cast<BoxedClass*>(parent)));
 }
 
-Box* bltinImport(Box* arg) {
-    if (arg->cls != str_cls) {
-        raiseExcHelper(TypeError, "__import__() argument 1 must be string, not %s", getTypeName(arg));
+Box* bltinImport(Box* name, Box* globals, Box* locals, Box** args) {
+    Box* fromlist = args[0];
+    Box* level = args[1];
+
+    RELEASE_ASSERT(globals == None, "not implemented");
+    RELEASE_ASSERT(locals == None, "not implemented");
+
+    if (name->cls != str_cls) {
+        raiseExcHelper(TypeError, "__import__() argument 1 must be string, not %s", getTypeName(name));
+    }
+
+    if (level->cls != int_cls) {
+        raiseExcHelper(TypeError, "an integer is required");
     }
 
-    return import(-1, new BoxedTuple({}), &static_cast<BoxedString*>(arg)->s);
+    return import(((BoxedInt*)level)->n, fromlist, &static_cast<BoxedString*>(name)->s);
 }
 
 Box* getattrFunc(Box* obj, Box* _str, Box* default_value) {
@@ -575,7 +585,8 @@ BoxedClass* BaseException, *Exception, *StandardError, *AssertionError, *Attribu
     *NameError, *KeyError, *IndexError, *IOError, *OSError, *ZeroDivisionError, *ValueError, *UnboundLocalError,
     *RuntimeError, *ImportError, *StopIteration, *Warning, *SyntaxError, *OverflowError, *DeprecationWarning,
     *MemoryError, *LookupError, *EnvironmentError, *ArithmeticError, *BufferError, *KeyboardInterrupt, *SystemExit,
-    *SystemError, *NotImplementedError, *PendingDeprecationWarning, *EOFError;
+    *SystemError, *NotImplementedError, *PendingDeprecationWarning, *EOFError, *UnicodeError, *UnicodeEncodeError,
+    *UnicodeDecodeError, *UnicodeTranslateError;
 
 Box* PyExc_RecursionErrorInst;
 Box* PyExc_MemoryErrorInst;
@@ -1028,6 +1039,13 @@ void setupBuiltins() {
     PendingDeprecationWarning = makeBuiltinException(Warning, "PendingDeprecationWarning");
     EOFError = makeBuiltinException(StandardError, "EOFError");
 
+    // Unicode errors
+    UnicodeError = makeBuiltinException(ValueError, "UnicodeError");
+    UnicodeEncodeError = makeBuiltinException(UnicodeError, "UnicodeEncodeError");
+    UnicodeDecodeError = makeBuiltinException(UnicodeError, "UnicodeDecodeError");
+    UnicodeTranslateError = makeBuiltinException(UnicodeError, "UnicodeTranslateError");
+
+
     BaseException->giveAttr("__reduce__",
                             new BoxedFunction(boxRTFunction((void*)BoxedException::__reduce__, UNKNOWN, 1)));
     EnvironmentError->giveAttr("__reduce__",
@@ -1096,8 +1114,10 @@ void setupBuiltins() {
     Box* issubclass_obj = new BoxedBuiltinFunctionOrMethod(boxRTFunction((void*)issubclass_func, BOXED_BOOL, 2));
     builtins_module->giveAttr("issubclass", issubclass_obj);
 
+    CLFunction* import_func = boxRTFunction((void*)bltinImport, UNKNOWN, 5, 4, false, false,
+                                            ParamNames({ "name", "globals", "locals", "fromlist", "level" }, "", ""));
     builtins_module->giveAttr("__import__",
-                              new BoxedBuiltinFunctionOrMethod(boxRTFunction((void*)bltinImport, UNKNOWN, 1)));
+                              new BoxedBuiltinFunctionOrMethod(import_func, { None, None, None, new BoxedInt(-1) }));
 
     enumerate_cls
         = new BoxedHeapClass(object_cls, &BoxedEnumerate::gcHandler, 0, sizeof(BoxedEnumerate), false, "enumerate");

src/runtime/builtin_modules/sys.cpp

@@ -209,6 +209,12 @@ static std::string generateVersionString() {
     return oss.str();
 }
 
+static bool isLittleEndian() {
+    unsigned long number = 1;
+    char* s = (char*)&number;
+    return s[0] != 0;
+}
+
 void setupSys() {
     sys_modules_dict = new BoxedDict();
     gc::registerPermanentRoot(sys_modules_dict);
@@ -235,6 +241,7 @@ void setupSys() {
 
     sys_module->giveAttr("warnoptions", new BoxedList());
     sys_module->giveAttr("py3kwarning", False);
+    sys_module->giveAttr("byteorder", new BoxedString(isLittleEndian() ? "little" : "big"));
 
     sys_module->giveAttr("platform", boxStrConstant("unknown")); // seems like a reasonable, if poor, default
 

src/runtime/capi.cpp

@@ -426,7 +426,8 @@ extern "C" PyObject* PyObject_Call(PyObject* callable_object, PyObject* args, Py
         else
             return runtimeCall(callable_object, ArgPassSpec(0, 0, true, false), args, NULL, NULL, NULL, NULL);
     } catch (ExcInfo e) {
-        Py_FatalError("unimplemented");
+        setCAPIException(e);
+        return NULL;
     }
 }
 
@@ -712,7 +713,20 @@ extern "C" void PyErr_SetObject(PyObject* exception, PyObject* value) noexcept {
 }
 
 extern "C" PyObject* PyErr_Format(PyObject* exception, const char* format, ...) noexcept {
-    Py_FatalError("unimplemented");
+    va_list vargs;
+    PyObject* string;
+
+#ifdef HAVE_STDARG_PROTOTYPES
+    va_start(vargs, format);
+#else
+    va_start(vargs);
+#endif
+
+    string = PyString_FromFormatV(format, vargs);
+    PyErr_SetObject(exception, string);
+    Py_XDECREF(string);
+    va_end(vargs);
+    return NULL;
 }
 
 extern "C" int PyErr_BadArgument() noexcept {
@@ -1433,6 +1447,8 @@ extern "C" PyObject* Py_FindMethod(PyMethodDef* methods, PyObject* self, const c
 }
 
 extern "C" PyObject* PyCFunction_NewEx(PyMethodDef* ml, PyObject* self, PyObject* module) noexcept {
+    RELEASE_ASSERT(module == NULL, "not implemented");
+    assert((ml->ml_flags & (~(METH_VARARGS | METH_KEYWORDS | METH_NOARGS | METH_O))) == 0);
 
     return new BoxedCApiFunction(ml->ml_flags, self, ml->ml_name, ml->ml_meth);
 }

src/runtime/import.cpp

@@ -159,14 +159,16 @@ static Box* importSub(const std::string& name, const std::string& full_name, Box
     return NULL;
 }
 
-static Box* import(const std::string* name, bool return_first) {
+static Box* import(const std::string* name, bool return_first, int level) {
     assert(name);
     assert(name->size() > 0);
 
     static StatCounter slowpath_import("slowpath_import");
     slowpath_import.log();
 
-    BoxedDict* sys_modules = getSysModulesDict();
+    RELEASE_ASSERT(level == -1 || level == 0, "not implemented");
+    if (level == 0)
+        printf("Warning: import level 0 will be treated as -1!\n");
 
     size_t l = 0, r;
     Box* last_module = NULL;
@@ -210,6 +212,23 @@ extern "C" PyObject* PyImport_ImportModuleNoBlock(const char* name) noexcept {
     Py_FatalError("unimplemented");
 }
 
+// This function has the same behaviour as __import__()
+extern "C" PyObject* PyImport_ImportModuleLevel(const char* name, PyObject* globals, PyObject* locals,
+                                                PyObject* fromlist, int level) noexcept {
+    RELEASE_ASSERT(globals == NULL, "not implemented");
+    RELEASE_ASSERT(locals == NULL, "not implemented");
+    RELEASE_ASSERT(fromlist == NULL, "not implemented");
+    RELEASE_ASSERT(level == 0, "not implemented");
+
+    try {
+        std::string module_name = name;
+        return import(level, fromlist ? fromlist : None, &module_name);
+    } catch (ExcInfo e) {
+        setCAPIException(e);
+        return NULL;
+    }
+}
+
 // Named the same thing as the CPython method:
 static void ensure_fromlist(Box* module, Box* fromlist, const std::string& module_name, bool recursive) {
     if (module->getattr("__path__") == NULL) {
@@ -243,9 +262,9 @@ static void ensure_fromlist(Box* module, Box* fromlist, const std::string& modul
 }
 
 extern "C" Box* import(int level, Box* from_imports, const std::string* module_name) {
-    RELEASE_ASSERT(level == -1, "");
+    RELEASE_ASSERT(level == -1 || level == 0, "not implemented");
 
-    Box* module = import(module_name, from_imports == None);
+    Box* module = import(module_name, from_imports == None, level);
     assert(module);
 
     if (from_imports != None) {

src/runtime/tuple.cpp

@@ -305,8 +305,6 @@ extern "C" Box* tupleNew(Box* _cls, BoxedTuple* args, BoxedDict* kwargs) {
         raiseExcHelper(TypeError, "tuple.__new__(%s): %s is not a subtype of tuple", getNameOfClass(cls),
                        getNameOfClass(cls));
 
-    RELEASE_ASSERT(cls == tuple_cls, "");
-
     int args_sz = args->elts.size();
     int kwargs_sz = kwargs->d.size();
 
@@ -335,7 +333,7 @@ extern "C" Box* tupleNew(Box* _cls, BoxedTuple* args, BoxedDict* kwargs) {
             velts.push_back(e);
     }
 
-    return new BoxedTuple(std::move(velts));
+    return new (cls) BoxedTuple(std::move(velts));
 }
 
 extern "C" int PyTuple_SetItem(PyObject* op, Py_ssize_t i, PyObject* newitem) noexcept {

src/runtime/types.cpp

@@ -62,6 +62,7 @@ extern "C" void initfcntl();
 extern "C" void inittime();
 extern "C" void initarray();
 extern "C" void initzlib();
+extern "C" void init_codecs();
 
 namespace pyston {
 
@@ -1373,6 +1374,7 @@ void setupRuntime() {
     inittime();
     initarray();
     initzlib();
+    init_codecs();
 
     setupSysEnd();
 

src/runtime/unicode.cpp

@@ -373,6 +373,42 @@ extern "C" Py_UNICODE _PyUnicode_ToUppercase(Py_UNICODE ch) noexcept {
     Py_FatalError("unimplemented");
 }
 
+extern "C" int PyUnicodeEncodeError_GetStart(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" int PyUnicodeDecodeError_GetStart(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" int PyUnicodeTranslateError_GetStart(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" int PyUnicodeEncodeError_GetEnd(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" int PyUnicodeDecodeError_GetEnd(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" int PyUnicodeTranslateError_GetEnd(PyObject*, Py_ssize_t*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" PyObject* PyUnicodeEncodeError_GetObject(PyObject*) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" PyObject* _PyUnicode_DecodeUnicodeInternal(const char* s, Py_ssize_t size, const char* errors) noexcept {
+    Py_FatalError("unimplemented");
+}
+
+extern "C" PyObject* PyUnicode_BuildEncodingMap(PyObject* string) noexcept {
+    Py_FatalError("unimplemented");
+}
+
 // From CPython, unicodeobject.c
 // Used by Py_UNICODE_ISSPACE in unicodeobject.h
 /* Fast detection of the most frequent whitespace characters */

test/tests/optparse_test.py

 # allow-warning: converting unicode literal to str
+# allow-warning: import level 0 will be treated as -1
 # Simple optparse test, taken from the optparse.py docstring:
 
 from optparse import OptionParser

test/tests/str_encode_decode.py

+# allow-warning: converting unicode literal to str
+# allow-warning: import level 0 will be treated as -1!
+def test(string, encoding):
+ s = string.encode(encoding)
+ print encoding, s
+ assert string == s.decode(encoding)
+
+test("hello world", "hex")
+test("hello world", "base64")
+test("\r\n\\", "string-escape")
+

test/tests/sys_test.py

@@ -7,3 +7,4 @@ print sys.version[:3]
 print os.path.exists(sys.executable)
 print sys.prefix, sys.exec_prefix
 print sys.copyright[-200:]
+print sys.byteorder