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authorBenjamin Peterson <benjamin@python.org>2009-03-04 00:14:51 (GMT)
committerBenjamin Peterson <benjamin@python.org>2009-03-04 00:14:51 (GMT)
commit4fa88fa0ba35e25ad9be66ebbdaba9aca553dc8b (patch)
tree8486abb218ed5bb1f7713416fb64104f7e2537b0 /Modules
parent03ad812435f51261ba78bc5920d254ea0e123b37 (diff)
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merge the io-c branch: C implementation of the io module
The main io module now uses the C implementation. The Python one still exists in Lib/_pyio.py for ease of testing new features and usefulness to other implementers. The rewrite was done by Antoine Pitrou and Amaury Forgeot d'Arc. I was slightly helpful at the end. :) Following are the log messages from the io-c branch: Merged revisions 68683-68685,68687-68689,68693,68704,68741-68743,68745,68747,68752-68754,68756,68758,68812,68816-68817,68820-68822,68824-68825,68828,68876-68877,69037,69044,69104,69115,69194,69626-69629,69636,69638,69641-69642,69644-69654,69656-69661,69671,69677,69812-69815,69817,69827-69830,69839,69841-69845,69848,69850,69852,69854,69860,69865-69866,69868,69872-69873,69885,69888,69891-69893,69911,69913-69916,69963,70033,70035,70038,70041-70048,70067-70070,70075,70112,70133,70135,70140 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/io-c ........ r68683 | antoine.pitrou | 2009-01-17 17:13:48 -0600 (Sat, 17 Jan 2009) | 3 lines Merge in changes from the io-c sandbox. Tests will follow in separate commits. ........ r68684 | antoine.pitrou | 2009-01-17 17:17:26 -0600 (Sat, 17 Jan 2009) | 3 lines Fixes and additions to test_io.py ........ r68685 | antoine.pitrou | 2009-01-17 17:22:04 -0600 (Sat, 17 Jan 2009) | 1 line Fix test_fileio ........ r68687 | antoine.pitrou | 2009-01-17 17:35:11 -0600 (Sat, 17 Jan 2009) | 3 lines Add dependency to _iomodule.h for the various C sources ........ r68688 | antoine.pitrou | 2009-01-17 17:38:18 -0600 (Sat, 17 Jan 2009) | 3 lines These precautions are not needed anymore! ........ r68689 | antoine.pitrou | 2009-01-17 17:41:48 -0600 (Sat, 17 Jan 2009) | 3 lines Fix another test ........ r68693 | antoine.pitrou | 2009-01-17 17:49:58 -0600 (Sat, 17 Jan 2009) | 3 lines Fix test_uu (which was using private attributes of TextIOWrapper) ........ r68704 | antoine.pitrou | 2009-01-17 18:45:29 -0600 (Sat, 17 Jan 2009) | 3 lines Most io sources are Py_ssize_t-clean (I don't know about bytesio and stringio) ........ r68741 | antoine.pitrou | 2009-01-18 15:20:30 -0600 (Sun, 18 Jan 2009) | 3 lines Check return type in TextIOWrapper.__next__ ........ r68742 | antoine.pitrou | 2009-01-18 15:28:48 -0600 (Sun, 18 Jan 2009) | 4 lines Make binary buffered readline and iteration much faster (8x as fast as the IOBase generic implementation) ........ r68743 | antoine.pitrou | 2009-01-18 15:47:47 -0600 (Sun, 18 Jan 2009) | 3 lines Reinsert test_io_after_close (was removed by mistake) ........ r68745 | antoine.pitrou | 2009-01-18 16:16:06 -0600 (Sun, 18 Jan 2009) | 3 lines Add read, read1 and write methods to BufferedIOBase ........ r68747 | antoine.pitrou | 2009-01-18 16:35:58 -0600 (Sun, 18 Jan 2009) | 3 lines Kill test failure ........ r68752 | amaury.forgeotdarc | 2009-01-18 17:05:43 -0600 (Sun, 18 Jan 2009) | 3 lines Fix a segfault when e.g a BufferedReader is created with a FileIO in read mode. ........ r68753 | antoine.pitrou | 2009-01-18 17:13:09 -0600 (Sun, 18 Jan 2009) | 3 lines Add truncate() to text IO objects ........ r68754 | antoine.pitrou | 2009-01-18 17:51:08 -0600 (Sun, 18 Jan 2009) | 3 lines Remove IOBase.__del__ and replace it with custom code with tp_dealloc ........ r68756 | antoine.pitrou | 2009-01-18 18:10:16 -0600 (Sun, 18 Jan 2009) | 3 lines Remove irrelevant comment. ........ r68758 | antoine.pitrou | 2009-01-18 18:36:16 -0600 (Sun, 18 Jan 2009) | 3 lines in importlib:_fileio._FileIO -> _io.FileIO ........ r68812 | antoine.pitrou | 2009-01-20 14:15:51 -0600 (Tue, 20 Jan 2009) | 3 lines Add garbage collection support to FileIO objects ........ r68816 | antoine.pitrou | 2009-01-20 14:56:28 -0600 (Tue, 20 Jan 2009) | 3 lines Add GC support to Buffered and Text IO objects ........ r68817 | antoine.pitrou | 2009-01-20 15:19:45 -0600 (Tue, 20 Jan 2009) | 3 lines Add some file headers ........ r68820 | antoine.pitrou | 2009-01-20 15:29:59 -0600 (Tue, 20 Jan 2009) | 3 lines Add class TextIOBase ........ r68821 | antoine.pitrou | 2009-01-20 15:36:16 -0600 (Tue, 20 Jan 2009) | 3 lines Add properties to TextIOBase ........ r68822 | antoine.pitrou | 2009-01-20 15:41:19 -0600 (Tue, 20 Jan 2009) | 3 lines Disable the pure Python TextIOBase class, and inject C the implementation instead ........ r68824 | antoine.pitrou | 2009-01-20 16:36:28 -0600 (Tue, 20 Jan 2009) | 3 lines Fix two leaks ........ r68825 | antoine.pitrou | 2009-01-20 16:38:29 -0600 (Tue, 20 Jan 2009) | 3 lines FileIO.name is just a plain attribute, we can set it directly ........ r68828 | antoine.pitrou | 2009-01-20 17:06:33 -0600 (Tue, 20 Jan 2009) | 3 lines Speed up closed checks on text IO objects. Good for a 25% speedup on small ops. ........ r68876 | antoine.pitrou | 2009-01-23 17:01:25 -0600 (Fri, 23 Jan 2009) | 3 lines Two typos ........ r68877 | antoine.pitrou | 2009-01-23 18:13:20 -0600 (Fri, 23 Jan 2009) | 3 lines Remove two unused functions ........ r69037 | amaury.forgeotdarc | 2009-01-27 17:10:25 -0600 (Tue, 27 Jan 2009) | 2 lines Update the win32 project files ........ r69044 | antoine.pitrou | 2009-01-27 18:51:07 -0600 (Tue, 27 Jan 2009) | 3 lines Improve heuristic in IncrementalNewlineDecoder + some micro-optimizations ........ r69104 | antoine.pitrou | 2009-01-29 15:23:42 -0600 (Thu, 29 Jan 2009) | 3 lines Fix some crashers found by Victor ........ r69115 | hirokazu.yamamoto | 2009-01-29 20:36:28 -0600 (Thu, 29 Jan 2009) | 1 line Updated VC6 project file. ........ r69194 | antoine.pitrou | 2009-02-01 16:57:18 -0600 (Sun, 01 Feb 2009) | 3 lines Fix downcasting warnings in 32-bit mode with 64-bit offsets (Windows) ........ r69626 | benjamin.peterson | 2009-02-14 17:33:34 -0600 (Sat, 14 Feb 2009) | 1 line only catch AttributeError and UnsupportedOperation ........ r69627 | benjamin.peterson | 2009-02-14 21:35:28 -0600 (Sat, 14 Feb 2009) | 1 line give the IO module its own state and store the os and locale modules in it ........ r69628 | benjamin.peterson | 2009-02-14 22:08:32 -0600 (Sat, 14 Feb 2009) | 1 line put interned strings in the module state structure ........ r69629 | benjamin.peterson | 2009-02-14 22:15:29 -0600 (Sat, 14 Feb 2009) | 1 line put UnsupportedOperation in the module state ........ r69636 | benjamin.peterson | 2009-02-15 08:31:42 -0600 (Sun, 15 Feb 2009) | 1 line dealloc unsupported_operation ........ r69638 | benjamin.peterson | 2009-02-15 09:24:45 -0600 (Sun, 15 Feb 2009) | 1 line actually test the C implementation ........ r69641 | benjamin.peterson | 2009-02-15 10:12:37 -0600 (Sun, 15 Feb 2009) | 5 lines make interned strings globals again ;( putting them in the module state was asking for trouble when the module was dealloced before the classes in it were ........ r69642 | benjamin.peterson | 2009-02-15 10:19:45 -0600 (Sun, 15 Feb 2009) | 1 line actually test the python implementations ........ r69644 | antoine.pitrou | 2009-02-15 11:59:30 -0600 (Sun, 15 Feb 2009) | 3 lines Fix memory leak in destructor when a Python class inherits from IOBase (or an IOBase-derived type) ........ r69645 | antoine.pitrou | 2009-02-15 12:23:26 -0600 (Sun, 15 Feb 2009) | 3 lines Add a warning about the embarassing state of IOBase finalization ........ r69646 | antoine.pitrou | 2009-02-15 13:14:42 -0600 (Sun, 15 Feb 2009) | 3 lines Fix opening of 8-bit filenames with FileIO ........ r69647 | antoine.pitrou | 2009-02-15 13:20:22 -0600 (Sun, 15 Feb 2009) | 3 lines Fix leak in FileIO constructor ........ r69648 | antoine.pitrou | 2009-02-15 13:58:16 -0600 (Sun, 15 Feb 2009) | 3 lines Fix some refleaks ........ r69649 | antoine.pitrou | 2009-02-15 14:05:13 -0600 (Sun, 15 Feb 2009) | 3 lines Fix a leak in IOBase.writelines ........ r69650 | antoine.pitrou | 2009-02-15 14:11:56 -0600 (Sun, 15 Feb 2009) | 3 lines Fix memory leak in BufferedWriter.truncate ........ r69651 | antoine.pitrou | 2009-02-15 14:25:34 -0600 (Sun, 15 Feb 2009) | 3 lines Fix a leak in TextIOWrapper.seek ........ r69652 | antoine.pitrou | 2009-02-15 14:26:28 -0600 (Sun, 15 Feb 2009) | 3 lines Unify implementations of truncate for buffered objects ........ r69653 | antoine.pitrou | 2009-02-15 15:15:15 -0600 (Sun, 15 Feb 2009) | 3 lines Fix more leaks in TextIOWrapper ........ r69654 | antoine.pitrou | 2009-02-15 15:21:57 -0600 (Sun, 15 Feb 2009) | 3 lines Smaller chunk size for a faster test ........ r69656 | benjamin.peterson | 2009-02-15 17:29:48 -0600 (Sun, 15 Feb 2009) | 1 line braces make this much clearer ........ r69657 | benjamin.peterson | 2009-02-15 17:46:07 -0600 (Sun, 15 Feb 2009) | 1 line use the correct macro ........ r69658 | antoine.pitrou | 2009-02-15 19:38:59 -0600 (Sun, 15 Feb 2009) | 5 lines Fix crash in test_urllib2_localnet in debug mode. It was due to an HTTPResponse object being revived when calling its close() method in IOBase's tp_dealloc. _PyIOBase_finalize() starts looking scary... ........ r69659 | benjamin.peterson | 2009-02-15 20:55:48 -0600 (Sun, 15 Feb 2009) | 1 line fix segfault on initialization failing ........ r69660 | benjamin.peterson | 2009-02-15 21:09:31 -0600 (Sun, 15 Feb 2009) | 1 line apparently locale.getprefferedencoding() can raise a ImportError, too ........ r69661 | benjamin.peterson | 2009-02-15 21:54:15 -0600 (Sun, 15 Feb 2009) | 1 line it's amazing this worked at all; I was using the wrong structs! ........ r69671 | benjamin.peterson | 2009-02-16 08:38:27 -0600 (Mon, 16 Feb 2009) | 1 line add garbage collection support to bytesio ........ r69677 | benjamin.peterson | 2009-02-16 10:31:03 -0600 (Mon, 16 Feb 2009) | 5 lines reduce ImportError catching code duplication I'm not sure this makes the code clearer with its new gotos, but at least I added a big fat comment ........ r69812 | antoine.pitrou | 2009-02-20 13:50:16 -0600 (Fri, 20 Feb 2009) | 3 lines _StringIO now belongs to the _io modules, rather to its own _stringio module ........ r69813 | antoine.pitrou | 2009-02-20 13:58:22 -0600 (Fri, 20 Feb 2009) | 3 lines Add a test for StringIO properties ........ r69814 | antoine.pitrou | 2009-02-20 14:06:03 -0600 (Fri, 20 Feb 2009) | 3 lines Reimplement a few trivial StringIO functions and properties in C ........ r69815 | antoine.pitrou | 2009-02-20 14:13:11 -0600 (Fri, 20 Feb 2009) | 3 lines Add the line_buffering property to TextIOWrapper, and test for it ........ r69817 | antoine.pitrou | 2009-02-20 14:45:50 -0600 (Fri, 20 Feb 2009) | 4 lines Allow IncrementalNewlineDecoder to take unicode objects as decoding input if the decoder parameter is None This will help rewriting StringIO to C ........ r69827 | antoine.pitrou | 2009-02-20 19:00:30 -0600 (Fri, 20 Feb 2009) | 3 lines Rewrite most of StringIO in C. Some almost empty stubs remain to be converted. ........ r69828 | antoine.pitrou | 2009-02-20 19:09:25 -0600 (Fri, 20 Feb 2009) | 3 lines Plug a leak, and remove an unused string ........ r69829 | benjamin.peterson | 2009-02-20 20:02:28 -0600 (Fri, 20 Feb 2009) | 1 line this assertions makes more sense here ........ r69830 | benjamin.peterson | 2009-02-20 20:03:04 -0600 (Fri, 20 Feb 2009) | 1 line PyModule_AddObject can fail; simplify this code with a macro ........ r69839 | antoine.pitrou | 2009-02-21 12:54:01 -0600 (Sat, 21 Feb 2009) | 3 lines StringIO is now written entirely in C (and blazingly fast) ........ r69841 | benjamin.peterson | 2009-02-21 14:05:40 -0600 (Sat, 21 Feb 2009) | 1 line split the Python implementation of io into another module and rewrite the tests to test both implementations ........ r69842 | benjamin.peterson | 2009-02-21 14:10:00 -0600 (Sat, 21 Feb 2009) | 1 line closed is not a function ........ r69843 | benjamin.peterson | 2009-02-21 14:13:04 -0600 (Sat, 21 Feb 2009) | 1 line fix __all__ test ........ r69844 | benjamin.peterson | 2009-02-21 14:21:24 -0600 (Sat, 21 Feb 2009) | 1 line fix the rest of the Misc tests ........ r69845 | benjamin.peterson | 2009-02-21 14:26:59 -0600 (Sat, 21 Feb 2009) | 1 line RawIOBase is better for FileIO ........ r69848 | benjamin.peterson | 2009-02-21 15:33:53 -0600 (Sat, 21 Feb 2009) | 1 line fix some more tests broken by bag argument validation ........ r69850 | benjamin.peterson | 2009-02-21 16:16:42 -0600 (Sat, 21 Feb 2009) | 1 line make the python IncrementalNewineDecoder support a None decoder ........ r69852 | benjamin.peterson | 2009-02-21 16:36:09 -0600 (Sat, 21 Feb 2009) | 1 line fix a BlockingIOError.characters_written bug ........ r69854 | benjamin.peterson | 2009-02-21 16:49:02 -0600 (Sat, 21 Feb 2009) | 1 line check whence ........ r69860 | benjamin.peterson | 2009-02-21 17:42:50 -0600 (Sat, 21 Feb 2009) | 1 line fix some of these Misbehaving io tests ........ r69865 | benjamin.peterson | 2009-02-21 18:59:52 -0600 (Sat, 21 Feb 2009) | 1 line don't use super here() ........ r69866 | benjamin.peterson | 2009-02-21 19:05:28 -0600 (Sat, 21 Feb 2009) | 1 line use implementation specific classes ........ r69868 | benjamin.peterson | 2009-02-21 22:12:05 -0600 (Sat, 21 Feb 2009) | 1 line use a more DRY friendly approach to injecting module contents into test classes ........ r69872 | antoine.pitrou | 2009-02-22 13:39:45 -0600 (Sun, 22 Feb 2009) | 3 lines Sanitize destructor behaviour of IOBase. Now Python-defined attributes can be accessed from close(). ........ r69873 | antoine.pitrou | 2009-02-22 13:50:14 -0600 (Sun, 22 Feb 2009) | 4 lines Only set the internal fd after it has been checked to be valid (otherwise, the destructor will attempt to close it) ........ r69885 | benjamin.peterson | 2009-02-22 15:30:14 -0600 (Sun, 22 Feb 2009) | 1 line convert some other tests to use both io implementations ........ r69888 | antoine.pitrou | 2009-02-22 17:03:16 -0600 (Sun, 22 Feb 2009) | 3 lines Silence all exceptions when finalizing ........ r69891 | benjamin.peterson | 2009-02-22 17:27:24 -0600 (Sun, 22 Feb 2009) | 1 line convert another test to test both io implementations ........ r69892 | benjamin.peterson | 2009-02-22 17:32:15 -0600 (Sun, 22 Feb 2009) | 1 line help poor people like me to find their io tests (did I miss any?) ........ r69893 | benjamin.peterson | 2009-02-22 17:37:56 -0600 (Sun, 22 Feb 2009) | 1 line put a big note in the test telling people to write tests for both implementations now ........ r69911 | antoine.pitrou | 2009-02-23 13:57:18 -0600 (Mon, 23 Feb 2009) | 3 lines expose DEFAULT_BUFFER_SIZE again (fixes a bunch of test failures) ........ r69913 | antoine.pitrou | 2009-02-23 14:10:30 -0600 (Mon, 23 Feb 2009) | 4 lines Do the cyclic garbage collection tests only on the C version. The Python version is helpless as it uses __del__. ........ r69914 | antoine.pitrou | 2009-02-23 14:21:41 -0600 (Mon, 23 Feb 2009) | 3 lines Adapt test_largefile to test both implementations ........ r69915 | antoine.pitrou | 2009-02-23 14:25:14 -0600 (Mon, 23 Feb 2009) | 3 lines One small failure ........ r69916 | antoine.pitrou | 2009-02-23 14:28:33 -0600 (Mon, 23 Feb 2009) | 3 lines Add a comment, at BP's request ........ r69963 | antoine.pitrou | 2009-02-25 09:42:59 -0600 (Wed, 25 Feb 2009) | 3 lines Add a test of ABC inheritance ........ r70033 | antoine.pitrou | 2009-02-27 15:49:50 -0600 (Fri, 27 Feb 2009) | 3 lines The base classes now are ABCs. ........ r70035 | benjamin.peterson | 2009-02-27 15:57:41 -0600 (Fri, 27 Feb 2009) | 1 line good house keeping ........ r70038 | antoine.pitrou | 2009-02-27 17:05:23 -0600 (Fri, 27 Feb 2009) | 4 lines Make the buffer allocation overflow tests specific to the C implementation, since the Python implementation resizes its buffers when needed rather than allocating them up front. ........ r70041 | benjamin.peterson | 2009-02-27 18:26:12 -0600 (Fri, 27 Feb 2009) | 1 line kill java naming for sanity ........ r70042 | benjamin.peterson | 2009-02-27 18:28:53 -0600 (Fri, 27 Feb 2009) | 2 lines timingTest is superseded by iobench ........ r70043 | antoine.pitrou | 2009-02-27 19:13:50 -0600 (Fri, 27 Feb 2009) | 3 lines Remove the last traces of java naming in test_io ........ r70044 | antoine.pitrou | 2009-02-27 19:18:34 -0600 (Fri, 27 Feb 2009) | 3 lines Better resource cleanup ........ r70045 | antoine.pitrou | 2009-02-27 19:29:00 -0600 (Fri, 27 Feb 2009) | 3 lines Remove dubious uses of super(), and fix one test ........ r70046 | antoine.pitrou | 2009-02-27 19:31:00 -0600 (Fri, 27 Feb 2009) | 3 lines Bump up CHUNK_SIZE (no need to make the Python version look slower than it is) ........ r70047 | benjamin.peterson | 2009-02-27 20:03:26 -0600 (Fri, 27 Feb 2009) | 1 line fix typo ........ r70048 | benjamin.peterson | 2009-02-27 21:35:11 -0600 (Fri, 27 Feb 2009) | 1 line move code to a better place ........ r70067 | benjamin.peterson | 2009-02-28 10:43:20 -0600 (Sat, 28 Feb 2009) | 4 lines 1. make sure to undo buffered read aheads in BufferedRandom.seek() 2. refill the buffer if have <= 0 3. fix the last failing test_io test! ........ r70068 | benjamin.peterson | 2009-02-28 10:57:50 -0600 (Sat, 28 Feb 2009) | 1 line define read1() on the python implementation's BufferedIOBase ........ r70069 | benjamin.peterson | 2009-02-28 11:01:17 -0600 (Sat, 28 Feb 2009) | 1 line document read1() in BufferedIOBase ........ r70070 | benjamin.peterson | 2009-02-28 11:06:42 -0600 (Sat, 28 Feb 2009) | 1 line give credit where credit is due ........ r70075 | antoine.pitrou | 2009-02-28 13:34:59 -0600 (Sat, 28 Feb 2009) | 3 lines Amaury's name ........ r70112 | antoine.pitrou | 2009-03-02 17:11:55 -0600 (Mon, 02 Mar 2009) | 4 lines Looks like this is necessary in order to build cleanly under Windows (someone correct this if it's wrong, I'm no Windows user) ........ r70133 | benjamin.peterson | 2009-03-03 15:23:32 -0600 (Tue, 03 Mar 2009) | 1 line fix test_newline_property on _pyio.StringIO ........ r70135 | benjamin.peterson | 2009-03-03 15:47:30 -0600 (Tue, 03 Mar 2009) | 1 line fix typos and inconsistencies. thanks to Daniel Diniz ........ r70140 | benjamin.peterson | 2009-03-03 16:21:10 -0600 (Tue, 03 Mar 2009) | 1 line add the test from #5266 ........
Diffstat (limited to 'Modules')
-rw-r--r--Modules/Setup.dist7
-rw-r--r--Modules/_bufferedio.c2130
-rw-r--r--Modules/_bytesio.c90
-rw-r--r--Modules/_fileio.c230
-rw-r--r--Modules/_iobase.c905
-rw-r--r--Modules/_iomodule.h150
-rw-r--r--Modules/_stringio.c538
-rw-r--r--Modules/_textio.c2389
-rw-r--r--Modules/io.c760
9 files changed, 6964 insertions, 235 deletions
diff --git a/Modules/Setup.dist b/Modules/Setup.dist
index ef85db3..bfd74b5 100644
--- a/Modules/Setup.dist
+++ b/Modules/Setup.dist
@@ -111,10 +111,10 @@ pwd pwdmodule.c # this is needed to find out the user's home dir
# if $HOME is not set
_sre _sre.c # Fredrik Lundh's new regular expressions
_codecs _codecsmodule.c # access to the builtin codecs and codec registry
-_fileio _fileio.c # Standard I/O baseline
_weakref _weakref.c # weak references
-_bytesio _bytesio.c # For Lib/io.py
-_stringio _stringio.c # For Lib/io.py
+
+# Standard I/O baseline
+_io io.c _iobase.c _fileio.c _bytesio.c _bufferedio.c _textio.c _stringio.c
# The zipimport module is always imported at startup. Having it as a
# builtin module avoids some bootstrapping problems and reduces overhead.
@@ -164,7 +164,6 @@ _symtable symtablemodule.c
#_collections _collectionsmodule.c # Container types
#itertools itertoolsmodule.c # Functions creating iterators for efficient looping
#atexit atexitmodule.c # Register functions to be run at interpreter-shutdown
-#_functools _functoolsmodule.c # Tools for working with functions and callable objects
#_elementtree -I$(srcdir)/Modules/expat -DHAVE_EXPAT_CONFIG_H -DUSE_PYEXPAT_CAPI _elementtree.c # elementtree accelerator
#_pickle _pickle.c # pickle accelerator
#datetime datetimemodule.c # date/time type
diff --git a/Modules/_bufferedio.c b/Modules/_bufferedio.c
new file mode 100644
index 0000000..88f4fbc
--- /dev/null
+++ b/Modules/_bufferedio.c
@@ -0,0 +1,2130 @@
+/*
+ An implementation of Buffered I/O as defined by PEP 3116 - "New I/O"
+
+ Classes defined here: BufferedIOBase, BufferedReader, BufferedWriter,
+ BufferedRandom.
+
+ Written by Amaury Forgeot d'Arc and Antoine Pitrou
+*/
+
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+#include "structmember.h"
+#include "pythread.h"
+#include "_iomodule.h"
+
+/*
+ * BufferedIOBase class, inherits from IOBase.
+ */
+PyDoc_STRVAR(BufferedIOBase_doc,
+ "Base class for buffered IO objects.\n"
+ "\n"
+ "The main difference with RawIOBase is that the read() method\n"
+ "supports omitting the size argument, and does not have a default\n"
+ "implementation that defers to readinto().\n"
+ "\n"
+ "In addition, read(), readinto() and write() may raise\n"
+ "BlockingIOError if the underlying raw stream is in non-blocking\n"
+ "mode and not ready; unlike their raw counterparts, they will never\n"
+ "return None.\n"
+ "\n"
+ "A typical implementation should not inherit from a RawIOBase\n"
+ "implementation, but wrap one.\n"
+ );
+
+static PyObject *
+BufferedIOBase_readinto(PyObject *self, PyObject *args)
+{
+ Py_buffer buf;
+ Py_ssize_t len;
+ PyObject *data;
+
+ if (!PyArg_ParseTuple(args, "w*:readinto", &buf)) {
+ return NULL;
+ }
+
+ data = PyObject_CallMethod(self, "read", "n", buf.len);
+ if (data == NULL)
+ goto error;
+
+ if (!PyBytes_Check(data)) {
+ Py_DECREF(data);
+ PyErr_SetString(PyExc_TypeError, "read() should return bytes");
+ goto error;
+ }
+
+ len = Py_SIZE(data);
+ memcpy(buf.buf, PyBytes_AS_STRING(data), len);
+
+ PyBuffer_Release(&buf);
+ Py_DECREF(data);
+
+ return PyLong_FromSsize_t(len);
+
+ error:
+ PyBuffer_Release(&buf);
+ return NULL;
+}
+
+static PyObject *
+BufferedIOBase_unsupported(const char *message)
+{
+ PyErr_SetString(IO_STATE->unsupported_operation, message);
+ return NULL;
+}
+
+PyDoc_STRVAR(BufferedIOBase_read_doc,
+ "Read and return up to n bytes.\n"
+ "\n"
+ "If the argument is omitted, None, or negative, reads and\n"
+ "returns all data until EOF.\n"
+ "\n"
+ "If the argument is positive, and the underlying raw stream is\n"
+ "not 'interactive', multiple raw reads may be issued to satisfy\n"
+ "the byte count (unless EOF is reached first). But for\n"
+ "interactive raw streams (as well as sockets and pipes), at most\n"
+ "one raw read will be issued, and a short result does not imply\n"
+ "that EOF is imminent.\n"
+ "\n"
+ "Returns an empty bytes object on EOF.\n"
+ "\n"
+ "Returns None if the underlying raw stream was open in non-blocking\n"
+ "mode and no data is available at the moment.\n");
+
+static PyObject *
+BufferedIOBase_read(PyObject *self, PyObject *args)
+{
+ return BufferedIOBase_unsupported("read");
+}
+
+PyDoc_STRVAR(BufferedIOBase_read1_doc,
+ "Read and return up to n bytes, with at most one read() call\n"
+ "to the underlying raw stream. A short result does not imply\n"
+ "that EOF is imminent.\n"
+ "\n"
+ "Returns an empty bytes object on EOF.\n");
+
+static PyObject *
+BufferedIOBase_read1(PyObject *self, PyObject *args)
+{
+ return BufferedIOBase_unsupported("read1");
+}
+
+PyDoc_STRVAR(BufferedIOBase_write_doc,
+ "Write the given buffer to the IO stream.\n"
+ "\n"
+ "Returns the number of bytes written, which is never less than\n"
+ "len(b).\n"
+ "\n"
+ "Raises BlockingIOError if the buffer is full and the\n"
+ "underlying raw stream cannot accept more data at the moment.\n");
+
+static PyObject *
+BufferedIOBase_write(PyObject *self, PyObject *args)
+{
+ return BufferedIOBase_unsupported("write");
+}
+
+
+static PyMethodDef BufferedIOBase_methods[] = {
+ {"read", BufferedIOBase_read, METH_VARARGS, BufferedIOBase_read_doc},
+ {"read1", BufferedIOBase_read1, METH_VARARGS, BufferedIOBase_read1_doc},
+ {"readinto", BufferedIOBase_readinto, METH_VARARGS, NULL},
+ {"write", BufferedIOBase_write, METH_VARARGS, BufferedIOBase_write_doc},
+ {NULL, NULL}
+};
+
+PyTypeObject PyBufferedIOBase_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io._BufferedIOBase", /*tp_name*/
+ 0, /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ 0, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ BufferedIOBase_doc, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ BufferedIOBase_methods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ &PyIOBase_Type, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ 0, /* tp_new */
+};
+
+
+typedef struct {
+ PyObject_HEAD
+
+ PyObject *raw;
+ int ok; /* Initialized? */
+ int readable;
+ int writable;
+
+ /* Absolute position inside the raw stream (-1 if unknown). */
+ Py_off_t abs_pos;
+
+ /* A static buffer of size `buffer_size` */
+ char *buffer;
+ /* Current logical position in the buffer. */
+ Py_off_t pos;
+ /* Position of the raw stream in the buffer. */
+ Py_off_t raw_pos;
+
+ /* Just after the last buffered byte in the buffer, or -1 if the buffer
+ isn't ready for reading. */
+ Py_off_t read_end;
+
+ /* Just after the last byte actually written */
+ Py_off_t write_pos;
+ /* Just after the last byte waiting to be written, or -1 if the buffer
+ isn't ready for writing. */
+ Py_off_t write_end;
+
+ PyThread_type_lock lock;
+
+ Py_ssize_t buffer_size;
+ Py_ssize_t buffer_mask;
+
+ PyObject *dict;
+ PyObject *weakreflist;
+} BufferedObject;
+
+/*
+ Implementation notes:
+
+ * BufferedReader, BufferedWriter and BufferedRandom try to share most
+ methods (this is helped by the members `readable` and `writable`, which
+ are initialized in the respective constructors)
+ * They also share a single buffer for reading and writing. This enables
+ interleaved reads and writes without flushing. It also makes the logic
+ a bit trickier to get right.
+ * The absolute position of the raw stream is cached, if possible, in the
+ `abs_pos` member. It must be updated every time an operation is done
+ on the raw stream. If not sure, it can be reinitialized by calling
+ _Buffered_raw_tell(), which queries the raw stream (_Buffered_raw_seek()
+ also does it). To read it, use RAW_TELL().
+ * Three helpers, _BufferedReader_raw_read, _BufferedWriter_raw_write and
+ _BufferedWriter_flush_unlocked do a lot of useful housekeeping.
+
+ NOTE: we should try to maintain block alignment of reads and writes to the
+ raw stream (according to the buffer size), but for now it is only done
+ in read() and friends.
+
+ XXX: method naming is a bit messy.
+*/
+
+/* These macros protect the BufferedObject against concurrent operations. */
+
+#define ENTER_BUFFERED(self) \
+ Py_BEGIN_ALLOW_THREADS \
+ PyThread_acquire_lock(self->lock, 1); \
+ Py_END_ALLOW_THREADS
+
+#define LEAVE_BUFFERED(self) \
+ PyThread_release_lock(self->lock);
+
+#define CHECK_INITIALIZED(self) \
+ if (self->ok <= 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on uninitialized object"); \
+ return NULL; \
+ }
+
+#define CHECK_INITIALIZED_INT(self) \
+ if (self->ok <= 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on uninitialized object"); \
+ return -1; \
+ }
+
+#define VALID_READ_BUFFER(self) \
+ (self->readable && self->read_end != -1)
+
+#define VALID_WRITE_BUFFER(self) \
+ (self->writable && self->write_end != -1)
+
+#define ADJUST_POSITION(self, _new_pos) \
+ do { \
+ self->pos = _new_pos; \
+ if (VALID_READ_BUFFER(self) && self->read_end < self->pos) \
+ self->read_end = self->pos; \
+ } while(0)
+
+#define READAHEAD(self) \
+ ((self->readable && VALID_READ_BUFFER(self)) \
+ ? (self->read_end - self->pos) : 0)
+
+#define RAW_OFFSET(self) \
+ (((VALID_READ_BUFFER(self) || VALID_WRITE_BUFFER(self)) \
+ && self->raw_pos >= 0) ? self->raw_pos - self->pos : 0)
+
+#define RAW_TELL(self) \
+ (self->abs_pos != -1 ? self->abs_pos : _Buffered_raw_tell(self))
+
+#define MINUS_LAST_BLOCK(self, size) \
+ (self->buffer_mask ? \
+ (size & ~self->buffer_mask) : \
+ (self->buffer_size * (size / self->buffer_size)))
+
+
+static void
+BufferedObject_dealloc(BufferedObject *self)
+{
+ if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0)
+ return;
+ _PyObject_GC_UNTRACK(self);
+ self->ok = 0;
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject *)self);
+ Py_CLEAR(self->raw);
+ if (self->buffer) {
+ PyMem_Free(self->buffer);
+ self->buffer = NULL;
+ }
+ if (self->lock) {
+ PyThread_free_lock(self->lock);
+ self->lock = NULL;
+ }
+ Py_CLEAR(self->dict);
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static int
+Buffered_traverse(BufferedObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->raw);
+ Py_VISIT(self->dict);
+ return 0;
+}
+
+static int
+Buffered_clear(BufferedObject *self)
+{
+ if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0)
+ return -1;
+ self->ok = 0;
+ Py_CLEAR(self->raw);
+ Py_CLEAR(self->dict);
+ return 0;
+}
+
+/*
+ * _BufferedIOMixin methods
+ * This is not a class, just a collection of methods that will be reused
+ * by BufferedReader and BufferedWriter
+ */
+
+/* Flush and close */
+
+static PyObject *
+BufferedIOMixin_flush(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_flush, NULL);
+}
+
+static int
+BufferedIOMixin_closed(BufferedObject *self)
+{
+ int closed;
+ PyObject *res;
+ CHECK_INITIALIZED_INT(self)
+ res = PyObject_GetAttr(self->raw, _PyIO_str_closed);
+ if (res == NULL)
+ return -1;
+ closed = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ return closed;
+}
+
+static PyObject *
+BufferedIOMixin_closed_get(BufferedObject *self, void *context)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_GetAttr(self->raw, _PyIO_str_closed);
+}
+
+static PyObject *
+BufferedIOMixin_close(BufferedObject *self, PyObject *args)
+{
+ PyObject *res = NULL;
+ int r;
+
+ CHECK_INITIALIZED(self)
+ ENTER_BUFFERED(self)
+
+ r = BufferedIOMixin_closed(self);
+ if (r < 0)
+ goto end;
+ if (r > 0) {
+ res = Py_None;
+ Py_INCREF(res);
+ goto end;
+ }
+ /* flush() will most probably re-take the lock, so drop it first */
+ LEAVE_BUFFERED(self)
+ res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL);
+ ENTER_BUFFERED(self)
+ if (res == NULL) {
+ /* If flush() fails, just give up */
+ if (PyErr_ExceptionMatches(PyExc_IOError))
+ PyErr_Clear();
+ else
+ goto end;
+ }
+ Py_XDECREF(res);
+
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_close, NULL);
+
+end:
+ LEAVE_BUFFERED(self)
+ return res;
+}
+
+/* Inquiries */
+
+static PyObject *
+BufferedIOMixin_seekable(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seekable, NULL);
+}
+
+static PyObject *
+BufferedIOMixin_readable(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readable, NULL);
+}
+
+static PyObject *
+BufferedIOMixin_writable(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_writable, NULL);
+}
+
+static PyObject *
+BufferedIOMixin_name_get(BufferedObject *self, void *context)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_GetAttrString(self->raw, "name");
+}
+
+static PyObject *
+BufferedIOMixin_mode_get(BufferedObject *self, void *context)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_GetAttrString(self->raw, "mode");
+}
+
+/* Lower-level APIs */
+
+static PyObject *
+BufferedIOMixin_fileno(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_fileno, NULL);
+}
+
+static PyObject *
+BufferedIOMixin_isatty(BufferedObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self)
+ return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_isatty, NULL);
+}
+
+
+/* Forward decls */
+static PyObject *
+_BufferedWriter_flush_unlocked(BufferedObject *, int);
+static Py_ssize_t
+_BufferedReader_fill_buffer(BufferedObject *self);
+static void
+_BufferedReader_reset_buf(BufferedObject *self);
+static void
+_BufferedWriter_reset_buf(BufferedObject *self);
+static PyObject *
+_BufferedReader_peek_unlocked(BufferedObject *self, Py_ssize_t);
+static PyObject *
+_BufferedReader_read_unlocked(BufferedObject *self, Py_ssize_t);
+
+
+/*
+ * Helpers
+ */
+
+/* Returns the address of the `written` member if a BlockingIOError was
+ raised, NULL otherwise. The error is always re-raised. */
+static Py_ssize_t *
+_Buffered_check_blocking_error(void)
+{
+ PyObject *t, *v, *tb;
+ PyBlockingIOErrorObject *err;
+
+ PyErr_Fetch(&t, &v, &tb);
+ if (v == NULL || !PyErr_GivenExceptionMatches(v, PyExc_BlockingIOError)) {
+ PyErr_Restore(t, v, tb);
+ return NULL;
+ }
+ err = (PyBlockingIOErrorObject *) v;
+ /* TODO: sanity check (err->written >= 0) */
+ PyErr_Restore(t, v, tb);
+ return &err->written;
+}
+
+static Py_off_t
+_Buffered_raw_tell(BufferedObject *self)
+{
+ PyObject *res;
+ Py_off_t n;
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_tell, NULL);
+ if (res == NULL)
+ return -1;
+ n = PyNumber_AsOff_t(res, PyExc_ValueError);
+ Py_DECREF(res);
+ if (n < 0) {
+ if (!PyErr_Occurred())
+ PyErr_Format(PyExc_IOError,
+ "Raw stream returned invalid position %zd", n);
+ return -1;
+ }
+ self->abs_pos = n;
+ return n;
+}
+
+static Py_off_t
+_Buffered_raw_seek(BufferedObject *self, Py_off_t target, int whence)
+{
+ PyObject *res, *posobj, *whenceobj;
+ Py_off_t n;
+
+ posobj = PyLong_FromOff_t(target);
+ if (posobj == NULL)
+ return -1;
+ whenceobj = PyLong_FromLong(whence);
+ if (whenceobj == NULL) {
+ Py_DECREF(posobj);
+ return -1;
+ }
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seek,
+ posobj, whenceobj, NULL);
+ Py_DECREF(posobj);
+ Py_DECREF(whenceobj);
+ if (res == NULL)
+ return -1;
+ n = PyNumber_AsOff_t(res, PyExc_ValueError);
+ Py_DECREF(res);
+ if (n < 0) {
+ if (!PyErr_Occurred())
+ PyErr_Format(PyExc_IOError,
+ "Raw stream returned invalid position %zd", n);
+ return -1;
+ }
+ self->abs_pos = n;
+ return n;
+}
+
+static int
+_Buffered_init(BufferedObject *self)
+{
+ Py_ssize_t n;
+ if (self->buffer_size <= 0) {
+ PyErr_SetString(PyExc_ValueError,
+ "buffer size must be strictly positive");
+ return -1;
+ }
+ if (self->buffer)
+ PyMem_Free(self->buffer);
+ self->buffer = PyMem_Malloc(self->buffer_size);
+ if (self->buffer == NULL) {
+ PyErr_NoMemory();
+ return -1;
+ }
+ self->lock = PyThread_allocate_lock();
+ if (self->lock == NULL) {
+ PyErr_SetString(PyExc_RuntimeError, "can't allocate read lock");
+ return -1;
+ }
+ /* Find out whether buffer_size is a power of 2 */
+ /* XXX is this optimization useful? */
+ for (n = self->buffer_size - 1; n & 1; n >>= 1)
+ ;
+ if (n == 0)
+ self->buffer_mask = self->buffer_size - 1;
+ else
+ self->buffer_mask = 0;
+ if (_Buffered_raw_tell(self) == -1)
+ PyErr_Clear();
+ return 0;
+}
+
+/*
+ * Shared methods and wrappers
+ */
+
+static PyObject *
+Buffered_flush(BufferedObject *self, PyObject *args)
+{
+ PyObject *res;
+
+ CHECK_INITIALIZED(self)
+ if (BufferedIOMixin_closed(self)) {
+ PyErr_SetString(PyExc_ValueError, "flush of closed file");
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+ res = _BufferedWriter_flush_unlocked(self, 0);
+ if (res != NULL && self->readable) {
+ /* Rewind the raw stream so that its position corresponds to
+ the current logical position. */
+ Py_off_t n;
+ n = _Buffered_raw_seek(self, -RAW_OFFSET(self), 1);
+ if (n == -1)
+ Py_CLEAR(res);
+ _BufferedReader_reset_buf(self);
+ }
+ LEAVE_BUFFERED(self)
+
+ return res;
+}
+
+static PyObject *
+Buffered_peek(BufferedObject *self, PyObject *args)
+{
+ Py_ssize_t n = 0;
+ PyObject *res = NULL;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "|n:peek", &n)) {
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 1);
+ if (res == NULL)
+ goto end;
+ Py_CLEAR(res);
+ }
+ res = _BufferedReader_peek_unlocked(self, n);
+
+end:
+ LEAVE_BUFFERED(self)
+ return res;
+}
+
+static PyObject *
+Buffered_read(BufferedObject *self, PyObject *args)
+{
+ Py_ssize_t n = -1;
+ PyObject *res;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "|n:read", &n)) {
+ return NULL;
+ }
+ if (n < -1) {
+ PyErr_SetString(PyExc_ValueError,
+ "read length must be positive or -1");
+ return NULL;
+ }
+
+ if (BufferedIOMixin_closed(self)) {
+ PyErr_SetString(PyExc_ValueError, "read of closed file");
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+ res = _BufferedReader_read_unlocked(self, n);
+ LEAVE_BUFFERED(self)
+
+ return res;
+}
+
+static PyObject *
+Buffered_read1(BufferedObject *self, PyObject *args)
+{
+ Py_ssize_t n, have, r;
+ PyObject *res = NULL;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "n:read1", &n)) {
+ return NULL;
+ }
+
+ if (n < 0) {
+ PyErr_SetString(PyExc_ValueError,
+ "read length must be positive");
+ return NULL;
+ }
+ if (n == 0)
+ return PyBytes_FromStringAndSize(NULL, 0);
+
+ ENTER_BUFFERED(self)
+
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 1);
+ if (res == NULL)
+ goto end;
+ Py_CLEAR(res);
+ }
+
+ /* Return up to n bytes. If at least one byte is buffered, we
+ only return buffered bytes. Otherwise, we do one raw read. */
+
+ /* XXX: this mimicks the io.py implementation but is probably wrong.
+ If we need to read from the raw stream, then we could actually read
+ all `n` bytes asked by the caller (and possibly more, so as to fill
+ our buffer for the next reads). */
+
+ have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
+ if (have > 0) {
+ if (n > have)
+ n = have;
+ res = PyBytes_FromStringAndSize(self->buffer + self->pos, n);
+ if (res == NULL)
+ goto end;
+ self->pos += n;
+ goto end;
+ }
+
+ /* Fill the buffer from the raw stream, and copy it to the result. */
+ _BufferedReader_reset_buf(self);
+ r = _BufferedReader_fill_buffer(self);
+ if (r == -1)
+ goto end;
+ if (r == -2)
+ r = 0;
+ if (n > r)
+ n = r;
+ res = PyBytes_FromStringAndSize(self->buffer, n);
+ if (res == NULL)
+ goto end;
+ self->pos = n;
+
+end:
+ LEAVE_BUFFERED(self)
+ return res;
+}
+
+static PyObject *
+Buffered_readinto(BufferedObject *self, PyObject *args)
+{
+ PyObject *res = NULL;
+
+ CHECK_INITIALIZED(self)
+
+ /* TODO: use raw.readinto() instead! */
+ if (self->writable) {
+ ENTER_BUFFERED(self)
+ res = _BufferedWriter_flush_unlocked(self, 0);
+ LEAVE_BUFFERED(self)
+ if (res == NULL)
+ goto end;
+ Py_DECREF(res);
+ }
+ res = BufferedIOBase_readinto((PyObject *)self, args);
+
+end:
+ return res;
+}
+
+static PyObject *
+_Buffered_readline(BufferedObject *self, Py_ssize_t limit)
+{
+ PyObject *res = NULL;
+ PyObject *chunks = NULL;
+ Py_ssize_t n, written = 0;
+ const char *start, *s, *end;
+
+ if (BufferedIOMixin_closed(self)) {
+ PyErr_SetString(PyExc_ValueError, "readline of closed file");
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+
+ /* First, try to find a line in the buffer */
+ n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
+ if (limit >= 0 && n > limit)
+ n = limit;
+ start = self->buffer + self->pos;
+ end = start + n;
+ s = start;
+ while (s < end) {
+ if (*s++ == '\n') {
+ res = PyBytes_FromStringAndSize(start, s - start);
+ if (res != NULL)
+ self->pos += s - start;
+ goto end;
+ }
+ }
+ if (n == limit) {
+ res = PyBytes_FromStringAndSize(start, n);
+ if (res != NULL)
+ self->pos += n;
+ goto end;
+ }
+
+ /* Now we try to get some more from the raw stream */
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 1);
+ if (res == NULL)
+ goto end;
+ Py_CLEAR(res);
+ }
+ chunks = PyList_New(0);
+ if (chunks == NULL)
+ goto end;
+ if (n > 0) {
+ res = PyBytes_FromStringAndSize(start, n);
+ if (res == NULL)
+ goto end;
+ if (PyList_Append(chunks, res) < 0) {
+ Py_CLEAR(res);
+ goto end;
+ }
+ Py_CLEAR(res);
+ written += n;
+ if (limit >= 0)
+ limit -= n;
+ }
+
+ for (;;) {
+ _BufferedReader_reset_buf(self);
+ n = _BufferedReader_fill_buffer(self);
+ if (n == -1)
+ goto end;
+ if (n <= 0)
+ break;
+ if (limit >= 0 && n > limit)
+ n = limit;
+ start = self->buffer;
+ end = start + n;
+ s = start;
+ while (s < end) {
+ if (*s++ == '\n') {
+ res = PyBytes_FromStringAndSize(start, s - start);
+ if (res == NULL)
+ goto end;
+ self->pos = s - start;
+ goto found;
+ }
+ }
+ res = PyBytes_FromStringAndSize(start, n);
+ if (res == NULL)
+ goto end;
+ if (n == limit) {
+ self->pos = n;
+ break;
+ }
+ if (PyList_Append(chunks, res) < 0) {
+ Py_CLEAR(res);
+ goto end;
+ }
+ Py_CLEAR(res);
+ written += n;
+ if (limit >= 0)
+ limit -= n;
+ }
+found:
+ if (res != NULL && PyList_Append(chunks, res) < 0) {
+ Py_CLEAR(res);
+ goto end;
+ }
+ Py_CLEAR(res);
+ res = _PyBytes_Join(_PyIO_empty_bytes, chunks);
+
+end:
+ LEAVE_BUFFERED(self)
+ Py_XDECREF(chunks);
+ return res;
+}
+
+static PyObject *
+Buffered_readline(BufferedObject *self, PyObject *args)
+{
+ Py_ssize_t limit = -1;
+
+ CHECK_INITIALIZED(self)
+
+ if (!PyArg_ParseTuple(args, "|n:readline", &limit)) {
+ return NULL;
+ }
+ return _Buffered_readline(self, limit);
+}
+
+
+static PyObject *
+Buffered_tell(BufferedObject *self, PyObject *args)
+{
+ Py_off_t pos;
+
+ CHECK_INITIALIZED(self)
+ pos = _Buffered_raw_tell(self);
+ if (pos == -1)
+ return NULL;
+ pos -= RAW_OFFSET(self);
+ /* TODO: sanity check (pos >= 0) */
+ return PyLong_FromOff_t(pos);
+}
+
+static PyObject *
+Buffered_seek(BufferedObject *self, PyObject *args)
+{
+ Py_off_t target, n;
+ int whence = 0;
+ PyObject *targetobj, *res = NULL;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "O|i:seek", &targetobj, &whence)) {
+ return NULL;
+ }
+
+ if (whence < 0 || whence > 2) {
+ PyErr_Format(PyExc_ValueError,
+ "whence must be between 0 and 2, not %d", whence);
+ return NULL;
+ }
+ target = PyNumber_AsOff_t(targetobj, PyExc_ValueError);
+ if (target == -1 && PyErr_Occurred())
+ return NULL;
+
+ ENTER_BUFFERED(self)
+
+ if (whence != 2 && self->readable) {
+ Py_off_t current, avail;
+ /* Check if seeking leaves us inside the current buffer,
+ so as to return quickly if possible.
+ Don't know how to do that when whence == 2, though. */
+ current = RAW_TELL(self);
+ avail = READAHEAD(self);
+ if (avail > 0) {
+ Py_off_t offset;
+ if (whence == 0)
+ offset = target - (current - RAW_OFFSET(self));
+ else
+ offset = target;
+ if (offset >= -self->pos && offset <= avail) {
+ self->pos += offset;
+ res = PyLong_FromOff_t(current - avail + offset);
+ goto end;
+ }
+ }
+ }
+
+ /* Fallback: invoke raw seek() method and clear buffer */
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 0);
+ if (res == NULL)
+ goto end;
+ Py_CLEAR(res);
+ _BufferedWriter_reset_buf(self);
+ }
+
+ /* TODO: align on block boundary and read buffer if needed? */
+ if (whence == 1)
+ target -= RAW_OFFSET(self);
+ n = _Buffered_raw_seek(self, target, whence);
+ if (n == -1)
+ goto end;
+ self->raw_pos = -1;
+ res = PyLong_FromOff_t(n);
+ if (res != NULL && self->readable)
+ _BufferedReader_reset_buf(self);
+
+end:
+ LEAVE_BUFFERED(self)
+ return res;
+}
+
+static PyObject *
+Buffered_truncate(BufferedObject *self, PyObject *args)
+{
+ PyObject *pos = Py_None;
+ PyObject *res = NULL;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "|O:truncate", &pos)) {
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 0);
+ if (res == NULL)
+ goto end;
+ Py_CLEAR(res);
+ }
+ if (self->readable) {
+ if (pos == Py_None) {
+ /* Rewind the raw stream so that its position corresponds to
+ the current logical position. */
+ if (_Buffered_raw_seek(self, -RAW_OFFSET(self), 1) == -1)
+ goto end;
+ }
+ _BufferedReader_reset_buf(self);
+ }
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_truncate, pos, NULL);
+ if (res == NULL)
+ goto end;
+ /* Reset cached position */
+ if (_Buffered_raw_tell(self) == -1)
+ PyErr_Clear();
+
+end:
+ LEAVE_BUFFERED(self)
+ return res;
+}
+
+static PyObject *
+Buffered_iternext(BufferedObject *self)
+{
+ PyObject *line;
+ PyTypeObject *tp;
+
+ CHECK_INITIALIZED(self);
+
+ tp = Py_TYPE(self);
+ if (tp == &PyBufferedReader_Type ||
+ tp == &PyBufferedRandom_Type) {
+ /* Skip method call overhead for speed */
+ line = _Buffered_readline(self, -1);
+ }
+ else {
+ line = PyObject_CallMethodObjArgs((PyObject *)self,
+ _PyIO_str_readline, NULL);
+ if (line && !PyBytes_Check(line)) {
+ PyErr_Format(PyExc_IOError,
+ "readline() should have returned a bytes object, "
+ "not '%.200s'", Py_TYPE(line)->tp_name);
+ Py_DECREF(line);
+ return NULL;
+ }
+ }
+
+ if (line == NULL)
+ return NULL;
+
+ if (PyBytes_GET_SIZE(line) == 0) {
+ /* Reached EOF or would have blocked */
+ Py_DECREF(line);
+ return NULL;
+ }
+
+ return line;
+}
+
+/*
+ * class BufferedReader
+ */
+
+PyDoc_STRVAR(BufferedReader_doc,
+ "Create a new buffered reader using the given readable raw IO object.");
+
+static void _BufferedReader_reset_buf(BufferedObject *self)
+{
+ self->read_end = -1;
+}
+
+static int
+BufferedReader_init(BufferedObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"raw", "buffer_size", NULL};
+ Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE;
+ PyObject *raw;
+
+ self->ok = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedReader", kwlist,
+ &raw, &buffer_size)) {
+ return -1;
+ }
+
+ if (_PyIOBase_checkReadable(raw, Py_True) == NULL)
+ return -1;
+
+ Py_CLEAR(self->raw);
+ Py_INCREF(raw);
+ self->raw = raw;
+ self->buffer_size = buffer_size;
+ self->readable = 1;
+ self->writable = 0;
+
+ if (_Buffered_init(self) < 0)
+ return -1;
+ _BufferedReader_reset_buf(self);
+
+ self->ok = 1;
+ return 0;
+}
+
+static Py_ssize_t
+_BufferedReader_raw_read(BufferedObject *self, char *start, Py_ssize_t len)
+{
+ Py_buffer buf;
+ PyObject *memobj, *res;
+ Py_ssize_t n;
+ /* NOTE: the buffer needn't be released as its object is NULL. */
+ if (PyBuffer_FillInfo(&buf, NULL, start, len, 0, PyBUF_CONTIG) == -1)
+ return -1;
+ memobj = PyMemoryView_FromBuffer(&buf);
+ if (memobj == NULL)
+ return -1;
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readinto, memobj, NULL);
+ Py_DECREF(memobj);
+ if (res == NULL)
+ return -1;
+ if (res == Py_None) {
+ /* Non-blocking stream would have blocked. Special return code! */
+ Py_DECREF(res);
+ return -2;
+ }
+ n = PyNumber_AsSsize_t(res, PyExc_ValueError);
+ Py_DECREF(res);
+ if (n < 0 || n > len) {
+ PyErr_Format(PyExc_IOError,
+ "raw readinto() returned invalid length %zd "
+ "(should have been between 0 and %zd)", n, len);
+ return -1;
+ }
+ if (n > 0 && self->abs_pos != -1)
+ self->abs_pos += n;
+ return n;
+}
+
+static Py_ssize_t
+_BufferedReader_fill_buffer(BufferedObject *self)
+{
+ Py_ssize_t start, len, n;
+ if (VALID_READ_BUFFER(self))
+ start = Py_SAFE_DOWNCAST(self->read_end, Py_off_t, Py_ssize_t);
+ else
+ start = 0;
+ len = self->buffer_size - start;
+ n = _BufferedReader_raw_read(self, self->buffer + start, len);
+ if (n <= 0)
+ return n;
+ self->read_end = start + n;
+ self->raw_pos = start + n;
+ return n;
+}
+
+static PyObject *
+_BufferedReader_read_unlocked(BufferedObject *self, Py_ssize_t n)
+{
+ PyObject *data, *res = NULL;
+ Py_ssize_t current_size, remaining, written;
+ char *out;
+ static PyObject *sep = NULL;
+
+ /* Special case for when the number of bytes to read is unspecified. */
+ if (n == -1) {
+ PyObject *chunks = PyList_New(0);
+ if (chunks == NULL)
+ return NULL;
+
+ /* First copy what we have in the current buffer. */
+ current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
+ data = NULL;
+ if (current_size) {
+ data = PyBytes_FromStringAndSize(
+ self->buffer + self->pos, current_size);
+ if (data == NULL) {
+ Py_DECREF(chunks);
+ return NULL;
+ }
+ }
+ _BufferedReader_reset_buf(self);
+ /* We're going past the buffer's bounds, flush it */
+ if (self->writable) {
+ res = _BufferedWriter_flush_unlocked(self, 1);
+ if (res == NULL) {
+ Py_DECREF(chunks);
+ return NULL;
+ }
+ Py_CLEAR(res);
+ }
+ while (1) {
+ if (data) {
+ if (PyList_Append(chunks, data) < 0) {
+ Py_DECREF(data);
+ Py_DECREF(chunks);
+ return NULL;
+ }
+ Py_DECREF(data);
+ }
+
+ /* Read until EOF or until read() would block. */
+ data = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_read, NULL);
+ if (data == NULL) {
+ Py_DECREF(chunks);
+ return NULL;
+ }
+ if (data != Py_None && !PyBytes_Check(data)) {
+ Py_DECREF(data);
+ Py_DECREF(chunks);
+ PyErr_SetString(PyExc_TypeError, "read() should return bytes");
+ return NULL;
+ }
+ if (data == Py_None || PyBytes_GET_SIZE(data) == 0) {
+ if (current_size == 0) {
+ Py_DECREF(chunks);
+ return data;
+ }
+ else {
+ if (sep == NULL) {
+ sep = PyBytes_FromStringAndSize(NULL, 0);
+ if (sep == NULL) {
+ Py_DECREF(data);
+ Py_DECREF(chunks);
+ return NULL;
+ }
+ }
+ res =_PyBytes_Join(sep, chunks);
+ Py_DECREF(data);
+ Py_DECREF(chunks);
+ return res;
+ }
+ }
+ current_size += PyBytes_GET_SIZE(data);
+ if (self->abs_pos != -1)
+ self->abs_pos += PyBytes_GET_SIZE(data);
+ }
+ }
+
+ /* The number of bytes to read is specified, return at most n bytes. */
+ current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
+ if (n <= current_size) {
+ /* Fast path: the data to read is fully buffered. */
+ res = PyBytes_FromStringAndSize(self->buffer + self->pos, n);
+ if (res == NULL)
+ goto error;
+ self->pos += n;
+ return res;
+ }
+
+ /* Slow path: read from the stream until enough bytes are read,
+ * or until an EOF occurs or until read() would block.
+ */
+ res = PyBytes_FromStringAndSize(NULL, n);
+ if (res == NULL)
+ goto error;
+ out = PyBytes_AS_STRING(res);
+ remaining = n;
+ written = 0;
+ if (current_size > 0) {
+ memcpy(out, self->buffer + self->pos, current_size);
+ remaining -= current_size;
+ written += current_size;
+ }
+ _BufferedReader_reset_buf(self);
+ while (remaining > 0) {
+ /* We want to read a whole block at the end into buffer.
+ If we had readv() we could do this in one pass. */
+ Py_ssize_t r = MINUS_LAST_BLOCK(self, remaining);
+ if (r == 0)
+ break;
+ r = _BufferedReader_raw_read(self, out + written, r);
+ if (r == -1)
+ goto error;
+ if (r == 0 || r == -2) {
+ /* EOF occurred or read() would block. */
+ if (r == 0 || written > 0) {
+ if (_PyBytes_Resize(&res, written))
+ goto error;
+ return res;
+ }
+ Py_DECREF(res);
+ Py_INCREF(Py_None);
+ return Py_None;
+ }
+ remaining -= r;
+ written += r;
+ }
+ assert(remaining <= self->buffer_size);
+ self->pos = 0;
+ self->raw_pos = 0;
+ self->read_end = 0;
+ while (self->read_end < self->buffer_size) {
+ Py_ssize_t r = _BufferedReader_fill_buffer(self);
+ if (r == -1)
+ goto error;
+ if (r == 0 || r == -2) {
+ /* EOF occurred or read() would block. */
+ if (r == 0 || written > 0) {
+ if (_PyBytes_Resize(&res, written))
+ goto error;
+ return res;
+ }
+ Py_DECREF(res);
+ Py_INCREF(Py_None);
+ return Py_None;
+ }
+ if (remaining > r) {
+ memcpy(out + written, self->buffer + self->pos, r);
+ written += r;
+ self->pos += r;
+ remaining -= r;
+ }
+ else if (remaining > 0) {
+ memcpy(out + written, self->buffer + self->pos, remaining);
+ written += remaining;
+ self->pos += remaining;
+ remaining = 0;
+ }
+ if (remaining == 0)
+ break;
+ }
+
+ return res;
+
+error:
+ Py_XDECREF(res);
+ return NULL;
+}
+
+static PyObject *
+_BufferedReader_peek_unlocked(BufferedObject *self, Py_ssize_t n)
+{
+ Py_ssize_t have, r;
+
+ have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
+ /* Constraints:
+ 1. we don't want to advance the file position.
+ 2. we don't want to lose block alignment, so we can't shift the buffer
+ to make some place.
+ Therefore, we either return `have` bytes (if > 0), or a full buffer.
+ */
+ if (have > 0) {
+ return PyBytes_FromStringAndSize(self->buffer + self->pos, have);
+ }
+
+ /* Fill the buffer from the raw stream, and copy it to the result. */
+ _BufferedReader_reset_buf(self);
+ r = _BufferedReader_fill_buffer(self);
+ if (r == -1)
+ return NULL;
+ if (r == -2)
+ r = 0;
+ self->pos = 0;
+ return PyBytes_FromStringAndSize(self->buffer, r);
+}
+
+static PyMethodDef BufferedReader_methods[] = {
+ /* BufferedIOMixin methods */
+ {"flush", (PyCFunction)BufferedIOMixin_flush, METH_NOARGS},
+ {"close", (PyCFunction)BufferedIOMixin_close, METH_NOARGS},
+ {"seekable", (PyCFunction)BufferedIOMixin_seekable, METH_NOARGS},
+ {"readable", (PyCFunction)BufferedIOMixin_readable, METH_NOARGS},
+ {"writable", (PyCFunction)BufferedIOMixin_writable, METH_NOARGS},
+ {"fileno", (PyCFunction)BufferedIOMixin_fileno, METH_NOARGS},
+ {"isatty", (PyCFunction)BufferedIOMixin_isatty, METH_NOARGS},
+
+ {"read", (PyCFunction)Buffered_read, METH_VARARGS},
+ {"peek", (PyCFunction)Buffered_peek, METH_VARARGS},
+ {"read1", (PyCFunction)Buffered_read1, METH_VARARGS},
+ {"readline", (PyCFunction)Buffered_readline, METH_VARARGS},
+ {"seek", (PyCFunction)Buffered_seek, METH_VARARGS},
+ {"tell", (PyCFunction)Buffered_tell, METH_NOARGS},
+ {"truncate", (PyCFunction)Buffered_truncate, METH_VARARGS},
+ {NULL, NULL}
+};
+
+static PyMemberDef BufferedReader_members[] = {
+ {"raw", T_OBJECT, offsetof(BufferedObject, raw), 0},
+ {NULL}
+};
+
+static PyGetSetDef BufferedReader_getset[] = {
+ {"closed", (getter)BufferedIOMixin_closed_get, NULL, NULL},
+ {"name", (getter)BufferedIOMixin_name_get, NULL, NULL},
+ {"mode", (getter)BufferedIOMixin_mode_get, NULL, NULL},
+ {0}
+};
+
+
+PyTypeObject PyBufferedReader_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.BufferedReader", /*tp_name*/
+ sizeof(BufferedObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)BufferedObject_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ BufferedReader_doc, /* tp_doc */
+ (traverseproc)Buffered_traverse, /* tp_traverse */
+ (inquiry)Buffered_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(BufferedObject, weakreflist), /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ (iternextfunc)Buffered_iternext, /* tp_iternext */
+ BufferedReader_methods, /* tp_methods */
+ BufferedReader_members, /* tp_members */
+ BufferedReader_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(BufferedObject, dict), /* tp_dictoffset */
+ (initproc)BufferedReader_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/*
+ * class BufferedWriter
+ */
+PyDoc_STRVAR(BufferedWriter_doc,
+ "A buffer for a writeable sequential RawIO object.\n"
+ "\n"
+ "The constructor creates a BufferedWriter for the given writeable raw\n"
+ "stream. If the buffer_size is not given, it defaults to\n"
+ "DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n"
+ );
+
+static void
+_BufferedWriter_reset_buf(BufferedObject *self)
+{
+ self->write_pos = 0;
+ self->write_end = -1;
+}
+
+static int
+BufferedWriter_init(BufferedObject *self, PyObject *args, PyObject *kwds)
+{
+ /* TODO: properly deprecate max_buffer_size */
+ char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL};
+ Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE;
+ Py_ssize_t max_buffer_size = -1;
+ PyObject *raw;
+
+ self->ok = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist,
+ &raw, &buffer_size, &max_buffer_size)) {
+ return -1;
+ }
+
+ if (_PyIOBase_checkWritable(raw, Py_True) == NULL)
+ return -1;
+
+ Py_CLEAR(self->raw);
+ Py_INCREF(raw);
+ self->raw = raw;
+ self->readable = 0;
+ self->writable = 1;
+
+ self->buffer_size = buffer_size;
+ if (_Buffered_init(self) < 0)
+ return -1;
+ _BufferedWriter_reset_buf(self);
+ self->pos = 0;
+
+ self->ok = 1;
+ return 0;
+}
+
+static Py_ssize_t
+_BufferedWriter_raw_write(BufferedObject *self, char *start, Py_ssize_t len)
+{
+ Py_buffer buf;
+ PyObject *memobj, *res;
+ Py_ssize_t n;
+ /* NOTE: the buffer needn't be released as its object is NULL. */
+ if (PyBuffer_FillInfo(&buf, NULL, start, len, 1, PyBUF_CONTIG_RO) == -1)
+ return -1;
+ memobj = PyMemoryView_FromBuffer(&buf);
+ if (memobj == NULL)
+ return -1;
+ res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_write, memobj, NULL);
+ Py_DECREF(memobj);
+ if (res == NULL)
+ return -1;
+ n = PyNumber_AsSsize_t(res, PyExc_ValueError);
+ Py_DECREF(res);
+ if (n < 0 || n > len) {
+ PyErr_Format(PyExc_IOError,
+ "raw write() returned invalid length %zd "
+ "(should have been between 0 and %zd)", n, len);
+ return -1;
+ }
+ if (n > 0 && self->abs_pos != -1)
+ self->abs_pos += n;
+ return n;
+}
+
+/* `restore_pos` is 1 if we need to restore the raw stream position at
+ the end, 0 otherwise. */
+static PyObject *
+_BufferedWriter_flush_unlocked(BufferedObject *self, int restore_pos)
+{
+ Py_ssize_t written = 0;
+ Py_off_t n, rewind;
+
+ if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end)
+ goto end;
+ /* First, rewind */
+ rewind = RAW_OFFSET(self) + (self->pos - self->write_pos);
+ if (rewind != 0) {
+ n = _Buffered_raw_seek(self, -rewind, 1);
+ if (n < 0) {
+ goto error;
+ }
+ self->raw_pos -= rewind;
+ }
+ while (self->write_pos < self->write_end) {
+ n = _BufferedWriter_raw_write(self,
+ self->buffer + self->write_pos,
+ Py_SAFE_DOWNCAST(self->write_end - self->write_pos,
+ Py_off_t, Py_ssize_t));
+ if (n == -1) {
+ Py_ssize_t *w = _Buffered_check_blocking_error();
+ if (w == NULL)
+ goto error;
+ self->write_pos += *w;
+ self->raw_pos = self->write_pos;
+ written += *w;
+ *w = written;
+ /* Already re-raised */
+ goto error;
+ }
+ self->write_pos += n;
+ self->raw_pos = self->write_pos;
+ written += Py_SAFE_DOWNCAST(n, Py_off_t, Py_ssize_t);
+ }
+
+ if (restore_pos) {
+ Py_off_t forward = rewind - written;
+ if (forward != 0) {
+ n = _Buffered_raw_seek(self, forward, 1);
+ if (n < 0) {
+ goto error;
+ }
+ self->raw_pos += forward;
+ }
+ }
+ _BufferedWriter_reset_buf(self);
+
+end:
+ Py_RETURN_NONE;
+
+error:
+ return NULL;
+}
+
+static PyObject *
+BufferedWriter_write(BufferedObject *self, PyObject *args)
+{
+ PyObject *res = NULL;
+ Py_buffer buf;
+ Py_ssize_t written, avail, remaining, n;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "y*:write", &buf)) {
+ return NULL;
+ }
+
+ if (BufferedIOMixin_closed(self)) {
+ PyErr_SetString(PyExc_ValueError, "write to closed file");
+ PyBuffer_Release(&buf);
+ return NULL;
+ }
+
+ ENTER_BUFFERED(self)
+
+ /* Fast path: the data to write can be fully buffered. */
+ if (!VALID_READ_BUFFER(self) && !VALID_WRITE_BUFFER(self)) {
+ self->pos = 0;
+ self->raw_pos = 0;
+ }
+ avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t);
+ if (buf.len <= avail) {
+ memcpy(self->buffer + self->pos, buf.buf, buf.len);
+ if (!VALID_WRITE_BUFFER(self)) {
+ self->write_pos = self->pos;
+ }
+ ADJUST_POSITION(self, self->pos + buf.len);
+ if (self->pos > self->write_end)
+ self->write_end = self->pos;
+ written = buf.len;
+ goto end;
+ }
+
+ /* First write the current buffer */
+ res = _BufferedWriter_flush_unlocked(self, 0);
+ if (res == NULL) {
+ Py_ssize_t *w = _Buffered_check_blocking_error();
+ if (w == NULL)
+ goto error;
+ if (self->readable)
+ _BufferedReader_reset_buf(self);
+ /* Make some place by shifting the buffer. */
+ assert(VALID_WRITE_BUFFER(self));
+ memmove(self->buffer, self->buffer + self->write_pos,
+ Py_SAFE_DOWNCAST(self->write_end - self->write_pos,
+ Py_off_t, Py_ssize_t));
+ self->write_end -= self->write_pos;
+ self->raw_pos -= self->write_pos;
+ self->pos -= self->write_pos;
+ self->write_pos = 0;
+ avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end,
+ Py_off_t, Py_ssize_t);
+ if (buf.len <= avail) {
+ /* Everything can be buffered */
+ PyErr_Clear();
+ memcpy(self->buffer + self->write_end, buf.buf, buf.len);
+ self->write_end += buf.len;
+ written = buf.len;
+ goto end;
+ }
+ /* Buffer as much as possible. */
+ memcpy(self->buffer + self->write_end, buf.buf, avail);
+ self->write_end += avail;
+ /* Already re-raised */
+ *w = avail;
+ goto error;
+ }
+ Py_CLEAR(res);
+
+ /* Then write buf itself. At this point the buffer has been emptied. */
+ remaining = buf.len;
+ written = 0;
+ while (remaining > self->buffer_size) {
+ n = _BufferedWriter_raw_write(
+ self, (char *) buf.buf + written, buf.len - written);
+ if (n == -1) {
+ Py_ssize_t *w = _Buffered_check_blocking_error();
+ if (w == NULL)
+ goto error;
+ written += *w;
+ remaining -= *w;
+ if (remaining > self->buffer_size) {
+ /* Can't buffer everything, still buffer as much as possible */
+ memcpy(self->buffer,
+ (char *) buf.buf + written, self->buffer_size);
+ self->raw_pos = 0;
+ ADJUST_POSITION(self, self->buffer_size);
+ self->write_end = self->buffer_size;
+ *w = written + self->buffer_size;
+ /* Already re-raised */
+ goto error;
+ }
+ PyErr_Clear();
+ break;
+ }
+ written += n;
+ remaining -= n;
+ }
+ if (self->readable)
+ _BufferedReader_reset_buf(self);
+ if (remaining > 0) {
+ memcpy(self->buffer, (char *) buf.buf + written, remaining);
+ written += remaining;
+ }
+ self->write_pos = 0;
+ /* TODO: sanity check (remaining >= 0) */
+ self->write_end = remaining;
+ ADJUST_POSITION(self, remaining);
+ self->raw_pos = 0;
+
+end:
+ res = PyLong_FromSsize_t(written);
+
+error:
+ LEAVE_BUFFERED(self)
+ PyBuffer_Release(&buf);
+ return res;
+}
+
+static PyMethodDef BufferedWriter_methods[] = {
+ /* BufferedIOMixin methods */
+ {"close", (PyCFunction)BufferedIOMixin_close, METH_NOARGS},
+ {"seekable", (PyCFunction)BufferedIOMixin_seekable, METH_NOARGS},
+ {"readable", (PyCFunction)BufferedIOMixin_readable, METH_NOARGS},
+ {"writable", (PyCFunction)BufferedIOMixin_writable, METH_NOARGS},
+ {"fileno", (PyCFunction)BufferedIOMixin_fileno, METH_NOARGS},
+ {"isatty", (PyCFunction)BufferedIOMixin_isatty, METH_NOARGS},
+
+ {"write", (PyCFunction)BufferedWriter_write, METH_VARARGS},
+ {"truncate", (PyCFunction)Buffered_truncate, METH_VARARGS},
+ {"flush", (PyCFunction)Buffered_flush, METH_NOARGS},
+ {"seek", (PyCFunction)Buffered_seek, METH_VARARGS},
+ {"tell", (PyCFunction)Buffered_tell, METH_NOARGS},
+ {NULL, NULL}
+};
+
+static PyMemberDef BufferedWriter_members[] = {
+ {"raw", T_OBJECT, offsetof(BufferedObject, raw), 0},
+ {NULL}
+};
+
+static PyGetSetDef BufferedWriter_getset[] = {
+ {"closed", (getter)BufferedIOMixin_closed_get, NULL, NULL},
+ {"name", (getter)BufferedIOMixin_name_get, NULL, NULL},
+ {"mode", (getter)BufferedIOMixin_mode_get, NULL, NULL},
+ {0}
+};
+
+
+PyTypeObject PyBufferedWriter_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.BufferedWriter", /*tp_name*/
+ sizeof(BufferedObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)BufferedObject_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ BufferedWriter_doc, /* tp_doc */
+ (traverseproc)Buffered_traverse, /* tp_traverse */
+ (inquiry)Buffered_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(BufferedObject, weakreflist), /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ BufferedWriter_methods, /* tp_methods */
+ BufferedWriter_members, /* tp_members */
+ BufferedWriter_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(BufferedObject, dict), /* tp_dictoffset */
+ (initproc)BufferedWriter_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+
+/*
+ * BufferedRWPair
+ */
+
+PyDoc_STRVAR(BufferedRWPair_doc,
+ "A buffered reader and writer object together.\n"
+ "\n"
+ "A buffered reader object and buffered writer object put together to\n"
+ "form a sequential IO object that can read and write. This is typically\n"
+ "used with a socket or two-way pipe.\n"
+ "\n"
+ "reader and writer are RawIOBase objects that are readable and\n"
+ "writeable respectively. If the buffer_size is omitted it defaults to\n"
+ "DEFAULT_BUFFER_SIZE. The max_buffer_size (for the buffered writer)\n"
+ "defaults to twice the buffer size.\n"
+ );
+
+/* XXX The usefulness of this (compared to having two separate IO objects) is
+ * questionable.
+ */
+
+typedef struct {
+ PyObject_HEAD
+ BufferedObject *reader;
+ BufferedObject *writer;
+ PyObject *dict;
+ PyObject *weakreflist;
+} BufferedRWPairObject;
+
+static int
+BufferedRWPair_init(BufferedRWPairObject *self, PyObject *args,
+ PyObject *kwds)
+{
+ PyObject *reader, *writer;
+ Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE;
+ Py_ssize_t max_buffer_size = -1;
+
+ if (!PyArg_ParseTuple(args, "OO|nn:BufferedRWPair", &reader, &writer,
+ &buffer_size, &max_buffer_size)) {
+ return -1;
+ }
+
+ if (_PyIOBase_checkReadable(reader, Py_True) == NULL)
+ return -1;
+ if (_PyIOBase_checkWritable(writer, Py_True) == NULL)
+ return -1;
+
+ args = Py_BuildValue("(n)", buffer_size);
+ if (args == NULL) {
+ Py_CLEAR(self->reader);
+ return -1;
+ }
+ self->reader = (BufferedObject *)PyType_GenericNew(
+ &PyBufferedReader_Type, args, NULL);
+ Py_DECREF(args);
+ if (self->reader == NULL)
+ return -1;
+
+ args = Py_BuildValue("(nn)", buffer_size, max_buffer_size);
+ if (args == NULL) {
+ Py_CLEAR(self->reader);
+ return -1;
+ }
+ self->writer = (BufferedObject *)PyType_GenericNew(
+ &PyBufferedWriter_Type, args, NULL);
+ Py_DECREF(args);
+ if (self->writer == NULL) {
+ Py_CLEAR(self->reader);
+ return -1;
+ }
+ return 0;
+}
+
+static int
+BufferedRWPair_traverse(BufferedRWPairObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->dict);
+ return 0;
+}
+
+static int
+BufferedRWPair_clear(BufferedRWPairObject *self)
+{
+ Py_CLEAR(self->reader);
+ Py_CLEAR(self->writer);
+ Py_CLEAR(self->dict);
+ return 0;
+}
+
+static void
+BufferedRWPair_dealloc(BufferedRWPairObject *self)
+{
+ _PyObject_GC_UNTRACK(self);
+ Py_CLEAR(self->reader);
+ Py_CLEAR(self->writer);
+ Py_CLEAR(self->dict);
+ Py_TYPE(self)->tp_free((PyObject *) self);
+}
+
+static PyObject *
+_forward_call(BufferedObject *self, const char *name, PyObject *args)
+{
+ PyObject *func = PyObject_GetAttrString((PyObject *)self, name);
+ PyObject *ret;
+
+ if (func == NULL) {
+ PyErr_SetString(PyExc_AttributeError, name);
+ return NULL;
+ }
+
+ ret = PyObject_CallObject(func, args);
+ Py_DECREF(func);
+ return ret;
+}
+
+static PyObject *
+BufferedRWPair_read(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->reader, "read", args);
+}
+
+static PyObject *
+BufferedRWPair_peek(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->reader, "peek", args);
+}
+
+static PyObject *
+BufferedRWPair_read1(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->reader, "read1", args);
+}
+
+static PyObject *
+BufferedRWPair_write(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->writer, "write", args);
+}
+
+static PyObject *
+BufferedRWPair_flush(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->writer, "flush", args);
+}
+
+static PyObject *
+BufferedRWPair_readable(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->reader, "readable", args);
+}
+
+static PyObject *
+BufferedRWPair_writable(BufferedRWPairObject *self, PyObject *args)
+{
+ return _forward_call(self->writer, "writable", args);
+}
+
+static PyObject *
+BufferedRWPair_close(BufferedRWPairObject *self, PyObject *args)
+{
+ PyObject *ret = _forward_call(self->writer, "close", args);
+ if (ret == NULL)
+ return NULL;
+ Py_DECREF(ret);
+
+ return _forward_call(self->reader, "close", args);
+}
+
+static PyObject *
+BufferedRWPair_isatty(BufferedRWPairObject *self, PyObject *args)
+{
+ PyObject *ret = _forward_call(self->writer, "isatty", args);
+
+ if (ret != Py_False) {
+ /* either True or exception */
+ return ret;
+ }
+ Py_DECREF(ret);
+
+ return _forward_call(self->reader, "isatty", args);
+}
+
+
+static PyMethodDef BufferedRWPair_methods[] = {
+ {"read", (PyCFunction)BufferedRWPair_read, METH_VARARGS},
+ {"peek", (PyCFunction)BufferedRWPair_peek, METH_VARARGS},
+ {"read1", (PyCFunction)BufferedRWPair_read1, METH_VARARGS},
+ {"readinto", (PyCFunction)Buffered_readinto, METH_VARARGS},
+
+ {"write", (PyCFunction)BufferedRWPair_write, METH_VARARGS},
+ {"flush", (PyCFunction)BufferedRWPair_flush, METH_NOARGS},
+
+ {"readable", (PyCFunction)BufferedRWPair_readable, METH_NOARGS},
+ {"writable", (PyCFunction)BufferedRWPair_writable, METH_NOARGS},
+
+ {"close", (PyCFunction)BufferedRWPair_close, METH_NOARGS},
+ {"isatty", (PyCFunction)BufferedRWPair_isatty, METH_NOARGS},
+
+ {NULL, NULL}
+};
+
+PyTypeObject PyBufferedRWPair_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.BufferedRWPair", /*tp_name*/
+ sizeof(BufferedRWPairObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)BufferedRWPair_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /* tp_flags */
+ BufferedRWPair_doc, /* tp_doc */
+ (traverseproc)BufferedRWPair_traverse, /* tp_traverse */
+ (inquiry)BufferedRWPair_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(BufferedRWPairObject, weakreflist), /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ BufferedRWPair_methods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(BufferedRWPairObject, dict), /* tp_dictoffset */
+ (initproc)BufferedRWPair_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+
+/*
+ * BufferedRandom
+ */
+
+PyDoc_STRVAR(BufferedRandom_doc,
+ "A buffered interface to random access streams.\n"
+ "\n"
+ "The constructor creates a reader and writer for a seekable stream,\n"
+ "raw, given in the first argument. If the buffer_size is omitted it\n"
+ "defaults to DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n"
+ );
+
+static int
+BufferedRandom_init(BufferedObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL};
+ Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE;
+ Py_ssize_t max_buffer_size = -1;
+ PyObject *raw;
+
+ self->ok = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist,
+ &raw, &buffer_size, &max_buffer_size)) {
+ return -1;
+ }
+
+ if (_PyIOBase_checkSeekable(raw, Py_True) == NULL)
+ return -1;
+ if (_PyIOBase_checkReadable(raw, Py_True) == NULL)
+ return -1;
+ if (_PyIOBase_checkWritable(raw, Py_True) == NULL)
+ return -1;
+
+ Py_CLEAR(self->raw);
+ Py_INCREF(raw);
+ self->raw = raw;
+ self->buffer_size = buffer_size;
+ self->readable = 1;
+ self->writable = 1;
+
+ if (_Buffered_init(self) < 0)
+ return -1;
+ _BufferedReader_reset_buf(self);
+ _BufferedWriter_reset_buf(self);
+ self->pos = 0;
+
+ self->ok = 1;
+ return 0;
+}
+
+static PyMethodDef BufferedRandom_methods[] = {
+ /* BufferedIOMixin methods */
+ {"close", (PyCFunction)BufferedIOMixin_close, METH_NOARGS},
+ {"seekable", (PyCFunction)BufferedIOMixin_seekable, METH_NOARGS},
+ {"readable", (PyCFunction)BufferedIOMixin_readable, METH_NOARGS},
+ {"writable", (PyCFunction)BufferedIOMixin_writable, METH_NOARGS},
+ {"fileno", (PyCFunction)BufferedIOMixin_fileno, METH_NOARGS},
+ {"isatty", (PyCFunction)BufferedIOMixin_isatty, METH_NOARGS},
+
+ {"flush", (PyCFunction)Buffered_flush, METH_NOARGS},
+
+ {"seek", (PyCFunction)Buffered_seek, METH_VARARGS},
+ {"tell", (PyCFunction)Buffered_tell, METH_NOARGS},
+ {"truncate", (PyCFunction)Buffered_truncate, METH_VARARGS},
+ {"read", (PyCFunction)Buffered_read, METH_VARARGS},
+ {"read1", (PyCFunction)Buffered_read1, METH_VARARGS},
+ {"readinto", (PyCFunction)Buffered_readinto, METH_VARARGS},
+ {"readline", (PyCFunction)Buffered_readline, METH_VARARGS},
+ {"peek", (PyCFunction)Buffered_peek, METH_VARARGS},
+ {"write", (PyCFunction)BufferedWriter_write, METH_VARARGS},
+ {NULL, NULL}
+};
+
+static PyMemberDef BufferedRandom_members[] = {
+ {"raw", T_OBJECT, offsetof(BufferedObject, raw), 0},
+ {NULL}
+};
+
+static PyGetSetDef BufferedRandom_getset[] = {
+ {"closed", (getter)BufferedIOMixin_closed_get, NULL, NULL},
+ {"name", (getter)BufferedIOMixin_name_get, NULL, NULL},
+ {"mode", (getter)BufferedIOMixin_mode_get, NULL, NULL},
+ {0}
+};
+
+
+PyTypeObject PyBufferedRandom_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.BufferedRandom", /*tp_name*/
+ sizeof(BufferedObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)BufferedObject_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ BufferedRandom_doc, /* tp_doc */
+ (traverseproc)Buffered_traverse, /* tp_traverse */
+ (inquiry)Buffered_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(BufferedObject, weakreflist), /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ (iternextfunc)Buffered_iternext, /* tp_iternext */
+ BufferedRandom_methods, /* tp_methods */
+ BufferedRandom_members, /* tp_members */
+ BufferedRandom_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /*tp_dict*/
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(BufferedObject, dict), /*tp_dictoffset*/
+ (initproc)BufferedRandom_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
diff --git a/Modules/_bytesio.c b/Modules/_bytesio.c
index 2cea0fc..0068cb7 100644
--- a/Modules/_bytesio.c
+++ b/Modules/_bytesio.c
@@ -1,4 +1,6 @@
#include "Python.h"
+#include "structmember.h" /* for offsetof() */
+#include "_iomodule.h"
typedef struct {
PyObject_HEAD
@@ -6,6 +8,8 @@ typedef struct {
Py_ssize_t pos;
Py_ssize_t string_size;
size_t buf_size;
+ PyObject *dict;
+ PyObject *weakreflist;
} BytesIOObject;
#define CHECK_CLOSED(self) \
@@ -144,10 +148,12 @@ write_bytes(BytesIOObject *self, const char *bytes, Py_ssize_t len)
static PyObject *
bytesio_get_closed(BytesIOObject *self)
{
- if (self->buf == NULL)
+ if (self->buf == NULL) {
Py_RETURN_TRUE;
- else
+ }
+ else {
Py_RETURN_FALSE;
+ }
}
/* Generic getter for the writable, readable and seekable properties */
@@ -532,22 +538,22 @@ PyDoc_STRVAR(write_doc,
static PyObject *
bytesio_write(BytesIOObject *self, PyObject *obj)
{
- const char *bytes;
- Py_ssize_t size;
Py_ssize_t n = 0;
+ Py_buffer buf;
+ PyObject *result = NULL;
CHECK_CLOSED(self);
- if (PyObject_AsReadBuffer(obj, (void *)&bytes, &size) < 0)
+ if (PyObject_GetBuffer(obj, &buf, PyBUF_CONTIG_RO) < 0)
return NULL;
- if (size != 0) {
- n = write_bytes(self, bytes, size);
- if (n < 0)
- return NULL;
- }
+ if (buf.len != 0)
+ n = write_bytes(self, buf.buf, buf.len);
+ if (n >= 0)
+ result = PyLong_FromSsize_t(n);
- return PyLong_FromSsize_t(n);
+ PyBuffer_Release(&buf);
+ return result;
}
PyDoc_STRVAR(writelines_doc,
@@ -607,6 +613,7 @@ bytesio_dealloc(BytesIOObject *self)
PyMem_Free(self->buf);
self->buf = NULL;
}
+ Py_TYPE(self)->tp_clear((PyObject *)self);
Py_TYPE(self)->tp_free(self);
}
@@ -656,6 +663,24 @@ bytesio_init(BytesIOObject *self, PyObject *args, PyObject *kwds)
return 0;
}
+static int
+bytesio_traverse(BytesIOObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->dict);
+ Py_VISIT(self->weakreflist);
+ return 0;
+}
+
+static int
+bytesio_clear(BytesIOObject *self)
+{
+ Py_CLEAR(self->dict);
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject *)self);
+ return 0;
+}
+
+
static PyGetSetDef bytesio_getsetlist[] = {
{"closed", (getter)bytesio_get_closed, NULL,
"True if the file is closed."},
@@ -689,9 +714,9 @@ PyDoc_STRVAR(bytesio_doc,
"Create a buffered I/O implementation using an in-memory bytes\n"
"buffer, ready for reading and writing.");
-static PyTypeObject BytesIO_Type = {
+PyTypeObject PyBytesIO_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
- "_bytesio._BytesIO", /*tp_name*/
+ "_io.BytesIO", /*tp_name*/
sizeof(BytesIOObject), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)bytesio_dealloc, /*tp_dealloc*/
@@ -709,12 +734,13 @@ static PyTypeObject BytesIO_Type = {
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
+ Py_TPFLAGS_HAVE_GC, /*tp_flags*/
bytesio_doc, /*tp_doc*/
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
+ (traverseproc)bytesio_traverse, /*tp_traverse*/
+ (inquiry)bytesio_clear, /*tp_clear*/
0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
+ offsetof(BytesIOObject, weakreflist), /*tp_weaklistoffset*/
PyObject_SelfIter, /*tp_iter*/
(iternextfunc)bytesio_iternext, /*tp_iternext*/
bytesio_methods, /*tp_methods*/
@@ -724,36 +750,8 @@ static PyTypeObject BytesIO_Type = {
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
+ offsetof(BytesIOObject, dict), /*tp_dictoffset*/
(initproc)bytesio_init, /*tp_init*/
0, /*tp_alloc*/
bytesio_new, /*tp_new*/
};
-
-
-static struct PyModuleDef _bytesiomodule = {
- PyModuleDef_HEAD_INIT,
- "_bytesio",
- NULL,
- -1,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL
-};
-
-PyMODINIT_FUNC
-PyInit__bytesio(void)
-{
- PyObject *m;
-
- if (PyType_Ready(&BytesIO_Type) < 0)
- return NULL;
- m = PyModule_Create(&_bytesiomodule);
- if (m == NULL)
- return NULL;
- Py_INCREF(&BytesIO_Type);
- PyModule_AddObject(m, "_BytesIO", (PyObject *)&BytesIO_Type);
- return m;
-}
diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index 1ed6417..d6c14c6 100644
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -6,6 +6,7 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h> /* For offsetof */
+#include "_iomodule.h"
/*
* Known likely problems:
@@ -49,14 +50,19 @@ typedef struct {
int seekable : 2; /* -1 means unknown */
int closefd : 1;
PyObject *weakreflist;
+ PyObject *dict;
} PyFileIOObject;
PyTypeObject PyFileIO_Type;
#define PyFileIO_Check(op) (PyObject_TypeCheck((op), &PyFileIO_Type))
-static PyObject *
-portable_lseek(int fd, PyObject *posobj, int whence);
+
+int
+_PyFileIO_closed(PyObject *self)
+{
+ return ((PyFileIOObject *)self)->fd < 0;
+}
/* Returns 0 on success, -1 with exception set on failure. */
static int
@@ -88,14 +94,18 @@ fileio_close(PyFileIOObject *self)
self->fd = -1;
Py_RETURN_NONE;
}
- if (internal_close(self))
+ errno = internal_close(self);
+ if (errno < 0) {
+ PyErr_SetFromErrno(PyExc_IOError);
return NULL;
+ }
- Py_RETURN_NONE;
+ return PyObject_CallMethod((PyObject*)&PyRawIOBase_Type,
+ "close", "O", self);
}
static PyObject *
-fileio_new(PyTypeObject *type, PyObject *args, PyObject *kews)
+fileio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyFileIOObject *self;
@@ -119,7 +129,7 @@ fileio_new(PyTypeObject *type, PyObject *args, PyObject *kews)
directories, so we need a check. */
static int
-dircheck(PyFileIOObject* self, char *name)
+dircheck(PyFileIOObject* self, const char *name)
{
#if defined(HAVE_FSTAT) && defined(S_IFDIR) && defined(EISDIR)
struct stat buf;
@@ -146,7 +156,7 @@ check_fd(int fd)
{
#if defined(HAVE_FSTAT)
struct stat buf;
- if (!_PyVerify_fd(fd) || (fstat(fd, &buf) < 0 && errno == EBADF)) {
+ if (fstat(fd, &buf) < 0 && errno == EBADF) {
PyObject *exc;
char *msg = strerror(EBADF);
exc = PyObject_CallFunction(PyExc_OSError, "(is)",
@@ -165,7 +175,8 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
{
PyFileIOObject *self = (PyFileIOObject *) oself;
static char *kwlist[] = {"file", "mode", "closefd", NULL};
- char *name = NULL;
+ const char *name = NULL;
+ PyObject *nameobj;
char *mode = "r";
char *s;
#ifdef MS_WINDOWS
@@ -184,42 +195,58 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
return -1;
}
- if (PyArg_ParseTupleAndKeywords(args, kwds, "i|si:fileio",
- kwlist, &fd, &mode, &closefd)) {
- if (fd < 0) {
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|si:fileio",
+ kwlist, &nameobj, &mode, &closefd))
+ return -1;
+
+ if (PyFloat_Check(nameobj)) {
+ PyErr_SetString(PyExc_TypeError,
+ "integer argument expected, got float");
+ return -1;
+ }
+
+ fd = PyLong_AsLong(nameobj);
+ if (fd < 0) {
+ if (!PyErr_Occurred()) {
PyErr_SetString(PyExc_ValueError,
"Negative filedescriptor");
return -1;
}
- if (check_fd(fd))
- return -1;
- }
- else {
PyErr_Clear();
+ }
#ifdef Py_WIN_WIDE_FILENAMES
- if (GetVersion() < 0x80000000) {
+ if (GetVersion() < 0x80000000) {
/* On NT, so wide API available */
- PyObject *po;
- if (PyArg_ParseTupleAndKeywords(args, kwds, "U|si:fileio",
- kwlist, &po, &mode, &closefd)
- ) {
- widename = PyUnicode_AS_UNICODE(po);
- } else {
- /* Drop the argument parsing error as narrow
- strings are also valid. */
- PyErr_Clear();
- }
- }
- if (widename == NULL)
+ if (PyUnicode_Check(nameobj))
+ widename = PyUnicode_AS_UNICODE(nameobj);
+ }
+ if (widename == NULL)
#endif
- {
- if (!PyArg_ParseTupleAndKeywords(args, kwds, "et|si:fileio",
- kwlist,
- Py_FileSystemDefaultEncoding,
- &name, &mode, &closefd))
- return -1;
- }
+ if (fd < 0)
+ {
+ if (PyBytes_Check(nameobj) || PyByteArray_Check(nameobj)) {
+ if (PyObject_AsCharBuffer(nameobj, &name, NULL) < 0)
+ return -1;
+ }
+ else {
+ PyObject *s;
+ PyObject *u = PyUnicode_FromObject(nameobj);
+
+ if (u == NULL)
+ return -1;
+
+ s = PyUnicode_AsEncodedString(
+ u, Py_FileSystemDefaultEncoding, NULL);
+ Py_DECREF(u);
+ if (s == NULL)
+ return -1;
+ if (!PyBytes_Check(s)) {
+ PyErr_SetString(PyExc_TypeError,
+ "encoder failed to return bytes");
+ }
+ name = PyBytes_AS_STRING(s);
+ }
}
s = mode;
@@ -287,6 +314,8 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
if (fd >= 0) {
self->fd = fd;
self->closefd = closefd;
+ if (check_fd(fd))
+ goto error;
}
else {
self->closefd = 1;
@@ -318,15 +347,8 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
goto error;
}
- if (append) {
- /* For consistent behaviour, we explicitly seek to the
- end of file (otherwise, it might be done only on the
- first write()). */
- PyObject *pos = portable_lseek(self->fd, NULL, 2);
- if (pos == NULL)
- goto error;
- Py_DECREF(pos);
- }
+ if (PyObject_SetAttrString((PyObject *)self, "name", nameobj) < 0)
+ goto error;
goto done;
@@ -334,21 +356,32 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
ret = -1;
done:
- PyMem_Free(name);
return ret;
}
+static int
+fileio_traverse(PyFileIOObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->dict);
+ return 0;
+}
+
+static int
+fileio_clear(PyFileIOObject *self)
+{
+ Py_CLEAR(self->dict);
+ return 0;
+}
+
static void
fileio_dealloc(PyFileIOObject *self)
{
+ if (_PyIOBase_finalize((PyObject *) self) < 0)
+ return;
+ _PyObject_GC_UNTRACK(self);
if (self->weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) self);
-
- if (self->fd >= 0 && self->closefd) {
- if(internal_close(self))
- PyErr_WriteUnraisable((PyObject*)self);
- }
-
+ Py_CLEAR(self->dict);
Py_TYPE(self)->tp_free((PyObject *)self);
}
@@ -437,6 +470,31 @@ fileio_readinto(PyFileIOObject *self, PyObject *args)
return PyLong_FromSsize_t(n);
}
+static size_t
+new_buffersize(PyFileIOObject *self, size_t currentsize)
+{
+#ifdef HAVE_FSTAT
+ off_t pos, end;
+ struct stat st;
+ if (fstat(self->fd, &st) == 0) {
+ end = st.st_size;
+ pos = lseek(self->fd, 0L, SEEK_CUR);
+ if (end >= pos && pos >= 0)
+ return currentsize + end - pos + 1;
+ /* Add 1 so if the file were to grow we'd notice. */
+ }
+#endif
+ if (currentsize > SMALLCHUNK) {
+ /* Keep doubling until we reach BIGCHUNK;
+ then keep adding BIGCHUNK. */
+ if (currentsize <= BIGCHUNK)
+ return currentsize + currentsize;
+ else
+ return currentsize + BIGCHUNK;
+ }
+ return currentsize + SMALLCHUNK;
+}
+
static PyObject *
fileio_readall(PyFileIOObject *self)
{
@@ -449,17 +507,7 @@ fileio_readall(PyFileIOObject *self)
return NULL;
while (1) {
- Py_ssize_t newsize = (total < SMALLCHUNK) ? SMALLCHUNK : total;
-
- /* Keep doubling until we reach BIGCHUNK;
- then keep adding BIGCHUNK. */
- if (newsize <= BIGCHUNK) {
- newsize += newsize;
- }
- else {
- /* NOTE: overflow impossible due to limits on BUFSIZ */
- newsize += BIGCHUNK;
- }
+ Py_ssize_t newsize = new_buffersize(self, total);
if (PyBytes_GET_SIZE(result) < newsize) {
if (_PyBytes_Resize(&result, newsize) < 0) {
@@ -583,12 +631,6 @@ fileio_write(PyFileIOObject *self, PyObject *args)
/* XXX Windows support below is likely incomplete */
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
-typedef PY_LONG_LONG Py_off_t;
-#else
-typedef off_t Py_off_t;
-#endif
-
/* Cribbed from posix_lseek() */
static PyObject *
portable_lseek(int fd, PyObject *posobj, int whence)
@@ -755,9 +797,9 @@ static PyObject *
fileio_repr(PyFileIOObject *self)
{
if (self->fd < 0)
- return PyUnicode_FromFormat("_fileio._FileIO(-1)");
+ return PyUnicode_FromFormat("io.FileIO(-1)");
- return PyUnicode_FromFormat("_fileio._FileIO(%d, '%s')",
+ return PyUnicode_FromFormat("io.FileIO(%d, '%s')",
self->fd, mode_string(self));
}
@@ -899,15 +941,15 @@ static PyGetSetDef fileio_getsetlist[] = {
};
PyTypeObject PyFileIO_Type = {
- PyVarObject_HEAD_INIT(&PyType_Type, 0)
- "_FileIO",
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "FileIO",
sizeof(PyFileIOObject),
0,
(destructor)fileio_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
- 0, /* tp_reserved */
+ 0, /* tp_compare */
(reprfunc)fileio_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
@@ -918,10 +960,11 @@ PyTypeObject PyFileIO_Type = {
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /* tp_flags */
fileio_doc, /* tp_doc */
- 0, /* tp_traverse */
- 0, /* tp_clear */
+ (traverseproc)fileio_traverse, /* tp_traverse */
+ (inquiry)fileio_clear, /* tp_clear */
0, /* tp_richcompare */
offsetof(PyFileIOObject, weakreflist), /* tp_weaklistoffset */
0, /* tp_iter */
@@ -933,40 +976,9 @@ PyTypeObject PyFileIO_Type = {
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
- 0, /* tp_dictoffset */
+ offsetof(PyFileIOObject, dict), /* tp_dictoffset */
fileio_init, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
fileio_new, /* tp_new */
- PyObject_Del, /* tp_free */
-};
-
-static PyMethodDef module_methods[] = {
- {NULL, NULL}
+ PyObject_GC_Del, /* tp_free */
};
-
-static struct PyModuleDef fileiomodule = {
- PyModuleDef_HEAD_INIT,
- "_fileio",
- "Fast implementation of io.FileIO.",
- -1,
- module_methods,
- NULL,
- NULL,
- NULL,
- NULL
-};
-
-PyMODINIT_FUNC
-PyInit__fileio(void)
-{
- PyObject *m; /* a module object */
-
- m = PyModule_Create(&fileiomodule);
- if (m == NULL)
- return NULL;
- if (PyType_Ready(&PyFileIO_Type) < 0)
- return NULL;
- Py_INCREF(&PyFileIO_Type);
- PyModule_AddObject(m, "_FileIO", (PyObject *) &PyFileIO_Type);
- return m;
-}
diff --git a/Modules/_iobase.c b/Modules/_iobase.c
new file mode 100644
index 0000000..9ee2326
--- /dev/null
+++ b/Modules/_iobase.c
@@ -0,0 +1,905 @@
+/*
+ An implementation of the I/O abstract base classes hierarchy
+ as defined by PEP 3116 - "New I/O"
+
+ Classes defined here: IOBase, RawIOBase.
+
+ Written by Amaury Forgeot d'Arc and Antoine Pitrou
+*/
+
+
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+#include "structmember.h"
+#include "_iomodule.h"
+
+/*
+ * IOBase class, an abstract class
+ */
+
+typedef struct {
+ PyObject_HEAD
+
+ PyObject *dict;
+ PyObject *weakreflist;
+} IOBaseObject;
+
+PyDoc_STRVAR(IOBase_doc,
+ "The abstract base class for all I/O classes, acting on streams of\n"
+ "bytes. There is no public constructor.\n"
+ "\n"
+ "This class provides dummy implementations for many methods that\n"
+ "derived classes can override selectively; the default implementations\n"
+ "represent a file that cannot be read, written or seeked.\n"
+ "\n"
+ "Even though IOBase does not declare read, readinto, or write because\n"
+ "their signatures will vary, implementations and clients should\n"
+ "consider those methods part of the interface. Also, implementations\n"
+ "may raise a IOError when operations they do not support are called.\n"
+ "\n"
+ "The basic type used for binary data read from or written to a file is\n"
+ "bytes. bytearrays are accepted too, and in some cases (such as\n"
+ "readinto) needed. Text I/O classes work with str data.\n"
+ "\n"
+ "Note that calling any method (even inquiries) on a closed stream is\n"
+ "undefined. Implementations may raise IOError in this case.\n"
+ "\n"
+ "IOBase (and its subclasses) support the iterator protocol, meaning\n"
+ "that an IOBase object can be iterated over yielding the lines in a\n"
+ "stream.\n"
+ "\n"
+ "IOBase also supports the :keyword:`with` statement. In this example,\n"
+ "fp is closed after the suite of the with statment is complete:\n"
+ "\n"
+ "with open('spam.txt', 'r') as fp:\n"
+ " fp.write('Spam and eggs!')\n");
+
+/* Use this macro whenever you want to check the internal `closed` status
+ of the IOBase object rather than the virtual `closed` attribute as returned
+ by whatever subclass. */
+
+#define IS_CLOSED(self) \
+ PyObject_HasAttrString(self, "__IOBase_closed")
+
+/* Internal methods */
+static PyObject *
+IOBase_unsupported(const char *message)
+{
+ PyErr_SetString(IO_STATE->unsupported_operation, message);
+ return NULL;
+}
+
+/* Positionning */
+
+PyDoc_STRVAR(IOBase_seek_doc,
+ "Change stream position.\n"
+ "\n"
+ "Change the stream position to byte offset offset. offset is\n"
+ "interpreted relative to the position indicated by whence. Values\n"
+ "for whence are:\n"
+ "\n"
+ "* 0 -- start of stream (the default); offset should be zero or positive\n"
+ "* 1 -- current stream position; offset may be negative\n"
+ "* 2 -- end of stream; offset is usually negative\n"
+ "\n"
+ "Return the new absolute position.");
+
+static PyObject *
+IOBase_seek(PyObject *self, PyObject *args)
+{
+ return IOBase_unsupported("seek");
+}
+
+PyDoc_STRVAR(IOBase_tell_doc,
+ "Return current stream position.");
+
+static PyObject *
+IOBase_tell(PyObject *self, PyObject *args)
+{
+ return PyObject_CallMethod(self, "seek", "ii", 0, 1);
+}
+
+PyDoc_STRVAR(IOBase_truncate_doc,
+ "Truncate file to size bytes.\n"
+ "\n"
+ "Size defaults to the current IO position as reported by tell(). Return\n"
+ "the new size.");
+
+static PyObject *
+IOBase_truncate(PyObject *self, PyObject *args)
+{
+ return IOBase_unsupported("truncate");
+}
+
+/* Flush and close methods */
+
+PyDoc_STRVAR(IOBase_flush_doc,
+ "Flush write buffers, if applicable.\n"
+ "\n"
+ "This is not implemented for read-only and non-blocking streams.\n");
+
+static PyObject *
+IOBase_flush(PyObject *self, PyObject *args)
+{
+ /* XXX Should this return the number of bytes written??? */
+ if (IS_CLOSED(self)) {
+ PyErr_SetString(PyExc_ValueError, "I/O operation on closed file.");
+ return NULL;
+ }
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(IOBase_close_doc,
+ "Flush and close the IO object.\n"
+ "\n"
+ "This method has no effect if the file is already closed.\n");
+
+static int
+IOBase_closed(PyObject *self)
+{
+ PyObject *res;
+ int closed;
+ /* This gets the derived attribute, which is *not* __IOBase_closed
+ in most cases! */
+ res = PyObject_GetAttr(self, _PyIO_str_closed);
+ if (res == NULL)
+ return 0;
+ closed = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ return closed;
+}
+
+static PyObject *
+IOBase_closed_get(PyObject *self, void *context)
+{
+ return PyBool_FromLong(IS_CLOSED(self));
+}
+
+PyObject *
+_PyIOBase_checkClosed(PyObject *self, PyObject *args)
+{
+ if (IOBase_closed(self)) {
+ PyErr_SetString(PyExc_ValueError, "I/O operation on closed file.");
+ return NULL;
+ }
+ if (args == Py_True)
+ return Py_None;
+ else
+ Py_RETURN_NONE;
+}
+
+/* XXX: IOBase thinks it has to maintain its own internal state in
+ `__IOBase_closed` and call flush() by itself, but it is redundant with
+ whatever behaviour a non-trivial derived class will implement. */
+
+static PyObject *
+IOBase_close(PyObject *self, PyObject *args)
+{
+ PyObject *res;
+
+ if (IS_CLOSED(self))
+ Py_RETURN_NONE;
+
+ res = PyObject_CallMethodObjArgs(self, _PyIO_str_flush, NULL);
+ PyObject_SetAttrString(self, "__IOBase_closed", Py_True);
+ if (res == NULL) {
+ /* If flush() fails, just give up */
+ if (PyErr_ExceptionMatches(PyExc_IOError))
+ PyErr_Clear();
+ else
+ return NULL;
+ }
+ Py_XDECREF(res);
+ Py_RETURN_NONE;
+}
+
+/* Finalization and garbage collection support */
+
+int
+_PyIOBase_finalize(PyObject *self)
+{
+ PyObject *res;
+ PyObject *tp, *v, *tb;
+ int closed = 1;
+ int is_zombie;
+
+ /* If _PyIOBase_finalize() is called from a destructor, we need to
+ resurrect the object as calling close() can invoke arbitrary code. */
+ is_zombie = (Py_REFCNT(self) == 0);
+ if (is_zombie) {
+ ++Py_REFCNT(self);
+ }
+ PyErr_Fetch(&tp, &v, &tb);
+ /* If `closed` doesn't exist or can't be evaluated as bool, then the
+ object is probably in an unusable state, so ignore. */
+ res = PyObject_GetAttr(self, _PyIO_str_closed);
+ if (res == NULL)
+ PyErr_Clear();
+ else {
+ closed = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ if (closed == -1)
+ PyErr_Clear();
+ }
+ if (closed == 0) {
+ res = PyObject_CallMethodObjArgs((PyObject *) self, _PyIO_str_close,
+ NULL);
+ /* Silencing I/O errors is bad, but printing spurious tracebacks is
+ equally as bad, and potentially more frequent (because of
+ shutdown issues). */
+ if (res == NULL)
+ PyErr_Clear();
+ else
+ Py_DECREF(res);
+ }
+ PyErr_Restore(tp, v, tb);
+ if (is_zombie) {
+ if (--Py_REFCNT(self) != 0) {
+ /* The object lives again. The following code is taken from
+ slot_tp_del in typeobject.c. */
+ Py_ssize_t refcnt = Py_REFCNT(self);
+ _Py_NewReference(self);
+ Py_REFCNT(self) = refcnt;
+ /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so
+ * we need to undo that. */
+ _Py_DEC_REFTOTAL;
+ /* If Py_TRACE_REFS, _Py_NewReference re-added self to the object
+ * chain, so no more to do there.
+ * If COUNT_ALLOCS, the original decref bumped tp_frees, and
+ * _Py_NewReference bumped tp_allocs: both of those need to be
+ * undone.
+ */
+#ifdef COUNT_ALLOCS
+ --Py_TYPE(self)->tp_frees;
+ --Py_TYPE(self)->tp_allocs;
+#endif
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int
+IOBase_traverse(IOBaseObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->dict);
+ return 0;
+}
+
+static int
+IOBase_clear(IOBaseObject *self)
+{
+ if (_PyIOBase_finalize((PyObject *) self) < 0)
+ return -1;
+ Py_CLEAR(self->dict);
+ return 0;
+}
+
+/* Destructor */
+
+static void
+IOBase_dealloc(IOBaseObject *self)
+{
+ /* NOTE: since IOBaseObject has its own dict, Python-defined attributes
+ are still available here for close() to use.
+ However, if the derived class declares a __slots__, those slots are
+ already gone.
+ */
+ if (_PyIOBase_finalize((PyObject *) self) < 0) {
+ /* When called from a heap type's dealloc, the type will be
+ decref'ed on return (see e.g. subtype_dealloc in typeobject.c). */
+ if (PyType_HasFeature(Py_TYPE(self), Py_TPFLAGS_HEAPTYPE))
+ Py_INCREF(Py_TYPE(self));
+ return;
+ }
+ _PyObject_GC_UNTRACK(self);
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject *) self);
+ Py_CLEAR(self->dict);
+ Py_TYPE(self)->tp_free((PyObject *) self);
+}
+
+/* Inquiry methods */
+
+PyDoc_STRVAR(IOBase_seekable_doc,
+ "Return whether object supports random access.\n"
+ "\n"
+ "If False, seek(), tell() and truncate() will raise IOError.\n"
+ "This method may need to do a test seek().");
+
+static PyObject *
+IOBase_seekable(PyObject *self, PyObject *args)
+{
+ Py_RETURN_FALSE;
+}
+
+PyObject *
+_PyIOBase_checkSeekable(PyObject *self, PyObject *args)
+{
+ PyObject *res = PyObject_CallMethodObjArgs(self, _PyIO_str_seekable, NULL);
+ if (res == NULL)
+ return NULL;
+ if (res != Py_True) {
+ Py_CLEAR(res);
+ PyErr_SetString(PyExc_IOError, "File or stream is not seekable.");
+ return NULL;
+ }
+ if (args == Py_True) {
+ Py_DECREF(res);
+ }
+ return res;
+}
+
+PyDoc_STRVAR(IOBase_readable_doc,
+ "Return whether object was opened for reading.\n"
+ "\n"
+ "If False, read() will raise IOError.");
+
+static PyObject *
+IOBase_readable(PyObject *self, PyObject *args)
+{
+ Py_RETURN_FALSE;
+}
+
+/* May be called with any object */
+PyObject *
+_PyIOBase_checkReadable(PyObject *self, PyObject *args)
+{
+ PyObject *res = PyObject_CallMethodObjArgs(self, _PyIO_str_readable, NULL);
+ if (res == NULL)
+ return NULL;
+ if (res != Py_True) {
+ Py_CLEAR(res);
+ PyErr_SetString(PyExc_IOError, "File or stream is not readable.");
+ return NULL;
+ }
+ if (args == Py_True) {
+ Py_DECREF(res);
+ }
+ return res;
+}
+
+PyDoc_STRVAR(IOBase_writable_doc,
+ "Return whether object was opened for writing.\n"
+ "\n"
+ "If False, read() will raise IOError.");
+
+static PyObject *
+IOBase_writable(PyObject *self, PyObject *args)
+{
+ Py_RETURN_FALSE;
+}
+
+/* May be called with any object */
+PyObject *
+_PyIOBase_checkWritable(PyObject *self, PyObject *args)
+{
+ PyObject *res = PyObject_CallMethodObjArgs(self, _PyIO_str_writable, NULL);
+ if (res == NULL)
+ return NULL;
+ if (res != Py_True) {
+ Py_CLEAR(res);
+ PyErr_SetString(PyExc_IOError, "File or stream is not writable.");
+ return NULL;
+ }
+ if (args == Py_True) {
+ Py_DECREF(res);
+ }
+ return res;
+}
+
+/* Context manager */
+
+static PyObject *
+IOBase_enter(PyObject *self, PyObject *args)
+{
+ if (_PyIOBase_checkClosed(self, Py_True) == NULL)
+ return NULL;
+
+ Py_INCREF(self);
+ return self;
+}
+
+static PyObject *
+IOBase_exit(PyObject *self, PyObject *args)
+{
+ return PyObject_CallMethodObjArgs(self, _PyIO_str_close, NULL);
+}
+
+/* Lower-level APIs */
+
+/* XXX Should these be present even if unimplemented? */
+
+PyDoc_STRVAR(IOBase_fileno_doc,
+ "Returns underlying file descriptor if one exists.\n"
+ "\n"
+ "An IOError is raised if the IO object does not use a file descriptor.\n");
+
+static PyObject *
+IOBase_fileno(PyObject *self, PyObject *args)
+{
+ return IOBase_unsupported("fileno");
+}
+
+PyDoc_STRVAR(IOBase_isatty_doc,
+ "Return whether this is an 'interactive' stream.\n"
+ "\n"
+ "Return False if it can't be determined.\n");
+
+static PyObject *
+IOBase_isatty(PyObject *self, PyObject *args)
+{
+ if (_PyIOBase_checkClosed(self, Py_True) == NULL)
+ return NULL;
+ Py_RETURN_FALSE;
+}
+
+/* Readline(s) and writelines */
+
+PyDoc_STRVAR(IOBase_readline_doc,
+ "Read and return a line from the stream.\n"
+ "\n"
+ "If limit is specified, at most limit bytes will be read.\n"
+ "\n"
+ "The line terminator is always b'\n' for binary files; for text\n"
+ "files, the newlines argument to open can be used to select the line\n"
+ "terminator(s) recognized.\n");
+
+static PyObject *
+IOBase_readline(PyObject *self, PyObject *args)
+{
+ /* For backwards compatibility, a (slowish) readline(). */
+
+ Py_ssize_t limit = -1;
+ int has_peek = 0;
+ PyObject *buffer, *result;
+ Py_ssize_t old_size = -1;
+
+ if (!PyArg_ParseTuple(args, "|n:readline", &limit)) {
+ return NULL;
+ }
+
+ if (_PyIOBase_checkClosed(self, Py_True) == NULL)
+ return NULL;
+
+ if (PyObject_HasAttrString(self, "peek"))
+ has_peek = 1;
+
+ buffer = PyByteArray_FromStringAndSize(NULL, 0);
+ if (buffer == NULL)
+ return NULL;
+
+ while (limit < 0 || Py_SIZE(buffer) < limit) {
+ Py_ssize_t nreadahead = 1;
+ PyObject *b;
+
+ if (has_peek) {
+ PyObject *readahead = PyObject_CallMethod(self, "peek", "i", 1);
+ if (readahead == NULL)
+ goto fail;
+ if (!PyBytes_Check(readahead)) {
+ PyErr_Format(PyExc_IOError,
+ "peek() should have returned a bytes object, "
+ "not '%.200s'", Py_TYPE(readahead)->tp_name);
+ Py_DECREF(readahead);
+ goto fail;
+ }
+ if (PyBytes_GET_SIZE(readahead) > 0) {
+ Py_ssize_t n = 0;
+ const char *buf = PyBytes_AS_STRING(readahead);
+ if (limit >= 0) {
+ do {
+ if (n >= PyBytes_GET_SIZE(readahead) || n >= limit)
+ break;
+ if (buf[n++] == '\n')
+ break;
+ } while (1);
+ }
+ else {
+ do {
+ if (n >= PyBytes_GET_SIZE(readahead))
+ break;
+ if (buf[n++] == '\n')
+ break;
+ } while (1);
+ }
+ nreadahead = n;
+ }
+ Py_DECREF(readahead);
+ }
+
+ b = PyObject_CallMethod(self, "read", "n", nreadahead);
+ if (b == NULL)
+ goto fail;
+ if (!PyBytes_Check(b)) {
+ PyErr_Format(PyExc_IOError,
+ "read() should have returned a bytes object, "
+ "not '%.200s'", Py_TYPE(b)->tp_name);
+ Py_DECREF(b);
+ goto fail;
+ }
+ if (PyBytes_GET_SIZE(b) == 0) {
+ Py_DECREF(b);
+ break;
+ }
+
+ old_size = PyByteArray_GET_SIZE(buffer);
+ PyByteArray_Resize(buffer, old_size + PyBytes_GET_SIZE(b));
+ memcpy(PyByteArray_AS_STRING(buffer) + old_size,
+ PyBytes_AS_STRING(b), PyBytes_GET_SIZE(b));
+
+ Py_DECREF(b);
+
+ if (PyByteArray_AS_STRING(buffer)[PyByteArray_GET_SIZE(buffer) - 1] == '\n')
+ break;
+ }
+
+ result = PyBytes_FromStringAndSize(PyByteArray_AS_STRING(buffer),
+ PyByteArray_GET_SIZE(buffer));
+ Py_DECREF(buffer);
+ return result;
+ fail:
+ Py_DECREF(buffer);
+ return NULL;
+}
+
+static PyObject *
+IOBase_iter(PyObject *self)
+{
+ if (_PyIOBase_checkClosed(self, Py_True) == NULL)
+ return NULL;
+
+ Py_INCREF(self);
+ return self;
+}
+
+static PyObject *
+IOBase_iternext(PyObject *self)
+{
+ PyObject *line = PyObject_CallMethodObjArgs(self, _PyIO_str_readline, NULL);
+
+ if (line == NULL)
+ return NULL;
+
+ if (PyObject_Size(line) == 0) {
+ Py_DECREF(line);
+ return NULL;
+ }
+
+ return line;
+}
+
+PyDoc_STRVAR(IOBase_readlines_doc,
+ "Return a list of lines from the stream.\n"
+ "\n"
+ "hint can be specified to control the number of lines read: no more\n"
+ "lines will be read if the total size (in bytes/characters) of all\n"
+ "lines so far exceeds hint.");
+
+static PyObject *
+IOBase_readlines(PyObject *self, PyObject *args)
+{
+ Py_ssize_t hint = -1, length = 0;
+ PyObject *hintobj = Py_None, *result;
+
+ if (!PyArg_ParseTuple(args, "|O:readlines", &hintobj)) {
+ return NULL;
+ }
+ if (hintobj != Py_None) {
+ hint = PyNumber_AsSsize_t(hintobj, PyExc_ValueError);
+ if (hint == -1 && PyErr_Occurred())
+ return NULL;
+ }
+
+ result = PyList_New(0);
+ if (result == NULL)
+ return NULL;
+
+ if (hint <= 0) {
+ /* XXX special-casing this made sense in the Python version in order
+ to remove the bytecode interpretation overhead, but it could
+ probably be removed here. */
+ PyObject *ret = PyObject_CallMethod(result, "extend", "O", self);
+ if (ret == NULL) {
+ Py_DECREF(result);
+ return NULL;
+ }
+ Py_DECREF(ret);
+ return result;
+ }
+
+ while (1) {
+ PyObject *line = PyIter_Next(self);
+ if (line == NULL) {
+ if (PyErr_Occurred()) {
+ Py_DECREF(result);
+ return NULL;
+ }
+ else
+ break; /* StopIteration raised */
+ }
+
+ if (PyList_Append(result, line) < 0) {
+ Py_DECREF(line);
+ Py_DECREF(result);
+ return NULL;
+ }
+ length += PyObject_Size(line);
+ Py_DECREF(line);
+
+ if (length > hint)
+ break;
+ }
+ return result;
+}
+
+static PyObject *
+IOBase_writelines(PyObject *self, PyObject *args)
+{
+ PyObject *lines, *iter, *res;
+
+ if (!PyArg_ParseTuple(args, "O:writelines", &lines)) {
+ return NULL;
+ }
+
+ if (_PyIOBase_checkClosed(self, Py_True) == NULL)
+ return NULL;
+
+ iter = PyObject_GetIter(lines);
+ if (iter == NULL)
+ return NULL;
+
+ while (1) {
+ PyObject *line = PyIter_Next(iter);
+ if (line == NULL) {
+ if (PyErr_Occurred()) {
+ Py_DECREF(iter);
+ return NULL;
+ }
+ else
+ break; /* Stop Iteration */
+ }
+
+ res = PyObject_CallMethodObjArgs(self, _PyIO_str_write, line, NULL);
+ Py_DECREF(line);
+ if (res == NULL) {
+ Py_DECREF(iter);
+ return NULL;
+ }
+ Py_DECREF(res);
+ }
+ Py_DECREF(iter);
+ Py_RETURN_NONE;
+}
+
+static PyMethodDef IOBase_methods[] = {
+ {"seek", IOBase_seek, METH_VARARGS, IOBase_seek_doc},
+ {"tell", IOBase_tell, METH_NOARGS, IOBase_tell_doc},
+ {"truncate", IOBase_truncate, METH_VARARGS, IOBase_truncate_doc},
+ {"flush", IOBase_flush, METH_NOARGS, IOBase_flush_doc},
+ {"close", IOBase_close, METH_NOARGS, IOBase_close_doc},
+
+ {"seekable", IOBase_seekable, METH_NOARGS, IOBase_seekable_doc},
+ {"readable", IOBase_readable, METH_NOARGS, IOBase_readable_doc},
+ {"writable", IOBase_writable, METH_NOARGS, IOBase_writable_doc},
+
+ {"_checkClosed", _PyIOBase_checkClosed, METH_NOARGS},
+ {"_checkSeekable", _PyIOBase_checkSeekable, METH_NOARGS},
+ {"_checkReadable", _PyIOBase_checkReadable, METH_NOARGS},
+ {"_checkWritable", _PyIOBase_checkWritable, METH_NOARGS},
+
+ {"fileno", IOBase_fileno, METH_NOARGS, IOBase_fileno_doc},
+ {"isatty", IOBase_isatty, METH_NOARGS, IOBase_isatty_doc},
+
+ {"__enter__", IOBase_enter, METH_NOARGS},
+ {"__exit__", IOBase_exit, METH_VARARGS},
+
+ {"readline", IOBase_readline, METH_VARARGS, IOBase_readline_doc},
+ {"readlines", IOBase_readlines, METH_VARARGS, IOBase_readlines_doc},
+ {"writelines", IOBase_writelines, METH_VARARGS},
+
+ {NULL, NULL}
+};
+
+static PyGetSetDef IOBase_getset[] = {
+ {"closed", (getter)IOBase_closed_get, NULL, NULL},
+ {0}
+};
+
+
+PyTypeObject PyIOBase_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io._IOBase", /*tp_name*/
+ sizeof(IOBaseObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)IOBase_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ IOBase_doc, /* tp_doc */
+ (traverseproc)IOBase_traverse, /* tp_traverse */
+ (inquiry)IOBase_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(IOBaseObject, weakreflist), /* tp_weaklistoffset */
+ IOBase_iter, /* tp_iter */
+ IOBase_iternext, /* tp_iternext */
+ IOBase_methods, /* tp_methods */
+ 0, /* tp_members */
+ IOBase_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(IOBaseObject, dict), /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/*
+ * RawIOBase class, Inherits from IOBase.
+ */
+PyDoc_STRVAR(RawIOBase_doc,
+ "Base class for raw binary I/O.");
+
+/*
+ * The read() method is implemented by calling readinto(); derived classes
+ * that want to support read() only need to implement readinto() as a
+ * primitive operation. In general, readinto() can be more efficient than
+ * read().
+ *
+ * (It would be tempting to also provide an implementation of readinto() in
+ * terms of read(), in case the latter is a more suitable primitive operation,
+ * but that would lead to nasty recursion in case a subclass doesn't implement
+ * either.)
+*/
+
+static PyObject *
+RawIOBase_read(PyObject *self, PyObject *args)
+{
+ Py_ssize_t n = -1;
+ PyObject *b, *res;
+
+ if (!PyArg_ParseTuple(args, "|n:read", &n)) {
+ return NULL;
+ }
+
+ if (n < 0)
+ return PyObject_CallMethod(self, "readall", NULL);
+
+ /* TODO: allocate a bytes object directly instead and manually construct
+ a writable memoryview pointing to it. */
+ b = PyByteArray_FromStringAndSize(NULL, n);
+ if (b == NULL)
+ return NULL;
+
+ res = PyObject_CallMethodObjArgs(self, _PyIO_str_readinto, b, NULL);
+ if (res == NULL) {
+ Py_DECREF(b);
+ return NULL;
+ }
+
+ n = PyNumber_AsSsize_t(res, PyExc_ValueError);
+ Py_DECREF(res);
+ if (n == -1 && PyErr_Occurred()) {
+ Py_DECREF(b);
+ return NULL;
+ }
+
+ res = PyBytes_FromStringAndSize(PyByteArray_AsString(b), n);
+ Py_DECREF(b);
+ return res;
+}
+
+
+PyDoc_STRVAR(RawIOBase_readall_doc,
+ "Read until EOF, using multiple read() call.");
+
+static PyObject *
+RawIOBase_readall(PyObject *self, PyObject *args)
+{
+ PyObject *b = NULL;
+ Py_ssize_t cursize = 0;
+
+ while (1) {
+ Py_ssize_t length;
+ PyObject *data = PyObject_CallMethod(self, "read",
+ "i", DEFAULT_BUFFER_SIZE);
+
+ if (!data) {
+ Py_XDECREF(b);
+ return NULL;
+ }
+
+ if (!PyBytes_Check(data)) {
+ Py_XDECREF(b);
+ Py_DECREF(data);
+ PyErr_SetString(PyExc_TypeError, "read() should return bytes");
+ return NULL;
+ }
+
+ length = Py_SIZE(data);
+
+ if (b == NULL)
+ b = data;
+ else if (length != 0) {
+
+ _PyBytes_Resize(&b, cursize + length);
+ if (b == NULL) {
+ Py_DECREF(data);
+ return NULL;
+ }
+
+ memcpy(PyBytes_AS_STRING(b) + cursize,
+ PyBytes_AS_STRING(data), length);
+ Py_DECREF(data);
+ }
+
+ if (length == 0)
+ break;
+ }
+
+ return b;
+
+}
+
+static PyMethodDef RawIOBase_methods[] = {
+ {"read", RawIOBase_read, METH_VARARGS},
+ {"readall", RawIOBase_readall, METH_NOARGS, RawIOBase_readall_doc},
+ {NULL, NULL}
+};
+
+PyTypeObject PyRawIOBase_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io._RawIOBase", /*tp_name*/
+ 0, /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ 0, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ RawIOBase_doc, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ RawIOBase_methods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ &PyIOBase_Type, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ 0, /* tp_new */
+};
diff --git a/Modules/_iomodule.h b/Modules/_iomodule.h
new file mode 100644
index 0000000..a2f2413
--- /dev/null
+++ b/Modules/_iomodule.h
@@ -0,0 +1,150 @@
+/*
+ * Declarations shared between the different parts of the io module
+ */
+
+/* ABCs */
+extern PyTypeObject PyIOBase_Type;
+extern PyTypeObject PyRawIOBase_Type;
+extern PyTypeObject PyBufferedIOBase_Type;
+extern PyTypeObject PyTextIOBase_Type;
+
+/* Concrete classes */
+extern PyTypeObject PyFileIO_Type;
+extern PyTypeObject PyBytesIO_Type;
+extern PyTypeObject PyStringIO_Type;
+extern PyTypeObject PyBufferedReader_Type;
+extern PyTypeObject PyBufferedWriter_Type;
+extern PyTypeObject PyBufferedRWPair_Type;
+extern PyTypeObject PyBufferedRandom_Type;
+extern PyTypeObject PyTextIOWrapper_Type;
+extern PyTypeObject PyIncrementalNewlineDecoder_Type;
+
+/* These functions are used as METH_NOARGS methods, are normally called
+ * with args=NULL, and return a new reference.
+ * BUT when args=Py_True is passed, they return a borrowed reference.
+ */
+extern PyObject* _PyIOBase_checkReadable(PyObject *self, PyObject *args);
+extern PyObject* _PyIOBase_checkWritable(PyObject *self, PyObject *args);
+extern PyObject* _PyIOBase_checkSeekable(PyObject *self, PyObject *args);
+extern PyObject* _PyIOBase_checkClosed(PyObject *self, PyObject *args);
+
+/* Helper for finalization.
+ This function will revive an object ready to be deallocated and try to
+ close() it. It returns 0 if the object can be destroyed, or -1 if it
+ is alive again. */
+extern int _PyIOBase_finalize(PyObject *self);
+
+/* Returns true if the given FileIO object is closed.
+ Doesn't check the argument type, so be careful! */
+extern int _PyFileIO_closed(PyObject *self);
+
+/* Shortcut to the core of the IncrementalNewlineDecoder.decode method */
+extern PyObject *_PyIncrementalNewlineDecoder_decode(
+ PyObject *self, PyObject *input, int final);
+
+/* Finds the first line ending between `start` and `end`.
+ If found, returns the index after the line ending and doesn't touch
+ `*consumed`.
+ If not found, returns -1 and sets `*consumed` to the number of characters
+ which can be safely put aside until another search.
+
+ NOTE: for performance reasons, `end` must point to a NUL character ('\0').
+ Otherwise, the function will scan further and return garbage. */
+extern Py_ssize_t _PyIO_find_line_ending(
+ int translated, int universal, PyObject *readnl,
+ Py_UNICODE *start, Py_UNICODE *end, Py_ssize_t *consumed);
+
+
+#define DEFAULT_BUFFER_SIZE (8 * 1024) /* bytes */
+
+typedef struct {
+ PyException_HEAD
+ PyObject *myerrno;
+ PyObject *strerror;
+ PyObject *filename; /* Not used, but part of the IOError object */
+ Py_ssize_t written;
+} PyBlockingIOErrorObject;
+PyObject *PyExc_BlockingIOError;
+
+/*
+ * Offset type for positioning.
+ */
+
+#if defined(MS_WIN64) || defined(MS_WINDOWS)
+
+/* Windows uses long long for offsets */
+typedef PY_LONG_LONG Py_off_t;
+# define PyLong_AsOff_t PyLong_AsLongLong
+# define PyLong_FromOff_t PyLong_FromLongLong
+# define PY_OFF_T_MAX PY_LLONG_MAX
+# define PY_OFF_T_MIN PY_LLONG_MIN
+
+#else
+
+/* Other platforms use off_t */
+typedef off_t Py_off_t;
+#if (SIZEOF_OFF_T == SIZEOF_SIZE_T)
+# define PyLong_AsOff_t PyLong_AsSsize_t
+# define PyLong_FromOff_t PyLong_FromSsize_t
+# define PY_OFF_T_MAX PY_SSIZE_T_MAX
+# define PY_OFF_T_MIN PY_SSIZE_T_MIN
+#elif (SIZEOF_OFF_T == SIZEOF_LONG_LONG)
+# define PyLong_AsOff_t PyLong_AsLongLong
+# define PyLong_FromOff_t PyLong_FromLongLong
+# define PY_OFF_T_MAX PY_LLONG_MAX
+# define PY_OFF_T_MIN PY_LLONG_MIN
+#elif (SIZEOF_OFF_T == SIZEOF_LONG)
+# define PyLong_AsOff_t PyLong_AsLong
+# define PyLong_FromOff_t PyLong_FromLong
+# define PY_OFF_T_MAX LONG_MAX
+# define PY_OFF_T_MIN LONG_MIN
+#else
+# error off_t does not match either size_t, long, or long long!
+#endif
+
+#endif
+
+extern Py_off_t PyNumber_AsOff_t(PyObject *item, PyObject *err);
+
+/* Implementation details */
+
+/* IO module structure */
+
+extern PyModuleDef _PyIO_Module;
+
+typedef struct {
+ int initialized;
+ PyObject *os_module;
+ PyObject *locale_module;
+
+ PyObject *unsupported_operation;
+} _PyIO_State;
+
+#define IO_MOD_STATE(mod) ((_PyIO_State *)PyModule_GetState(mod))
+#define IO_STATE IO_MOD_STATE(PyState_FindModule(&_PyIO_Module))
+
+extern PyObject *_PyIO_str_close;
+extern PyObject *_PyIO_str_closed;
+extern PyObject *_PyIO_str_decode;
+extern PyObject *_PyIO_str_encode;
+extern PyObject *_PyIO_str_fileno;
+extern PyObject *_PyIO_str_flush;
+extern PyObject *_PyIO_str_getstate;
+extern PyObject *_PyIO_str_isatty;
+extern PyObject *_PyIO_str_newlines;
+extern PyObject *_PyIO_str_nl;
+extern PyObject *_PyIO_str_read;
+extern PyObject *_PyIO_str_read1;
+extern PyObject *_PyIO_str_readable;
+extern PyObject *_PyIO_str_readinto;
+extern PyObject *_PyIO_str_readline;
+extern PyObject *_PyIO_str_reset;
+extern PyObject *_PyIO_str_seek;
+extern PyObject *_PyIO_str_seekable;
+extern PyObject *_PyIO_str_tell;
+extern PyObject *_PyIO_str_truncate;
+extern PyObject *_PyIO_str_writable;
+extern PyObject *_PyIO_str_write;
+
+extern PyObject *_PyIO_empty_str;
+extern PyObject *_PyIO_empty_bytes;
diff --git a/Modules/_stringio.c b/Modules/_stringio.c
index e627258..a88fcb7 100644
--- a/Modules/_stringio.c
+++ b/Modules/_stringio.c
@@ -1,8 +1,11 @@
+#define PY_SSIZE_T_CLEAN
#include "Python.h"
+#include "structmember.h"
+#include "_iomodule.h"
-/* This module is a stripped down version of _bytesio.c with a Py_UNICODE
- buffer. Most of the functionality is provided by subclassing _StringIO. */
-
+/* Implementation note: the buffer is always at least one character longer
+ than the enclosed string, for proper functioning of _PyIO_find_line_ending.
+*/
typedef struct {
PyObject_HEAD
@@ -10,8 +13,39 @@ typedef struct {
Py_ssize_t pos;
Py_ssize_t string_size;
size_t buf_size;
+
+ char ok; /* initialized? */
+ char closed;
+ char readuniversal;
+ char readtranslate;
+ PyObject *decoder;
+ PyObject *readnl;
+ PyObject *writenl;
+
+ PyObject *dict;
+ PyObject *weakreflist;
} StringIOObject;
+#define CHECK_INITIALIZED(self) \
+ if (self->ok <= 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on uninitialized object"); \
+ return NULL; \
+ }
+
+#define CHECK_CLOSED(self) \
+ if (self->closed) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on closed file"); \
+ return NULL; \
+ }
+
+PyDoc_STRVAR(stringio_doc,
+ "Text I/O implementation using an in-memory buffer.\n"
+ "\n"
+ "The initial_value argument sets the value of object. The newline\n"
+ "argument is like the one of TextIOWrapper's constructor.");
+
/* Internal routine for changing the size, in terms of characters, of the
buffer of StringIO objects. The caller should ensure that the 'size'
@@ -26,6 +60,8 @@ resize_buffer(StringIOObject *self, size_t size)
assert(self->buf != NULL);
+ /* Reserve one more char for line ending detection. */
+ size = size + 1;
/* For simplicity, stay in the range of the signed type. Anyway, Python
doesn't allow strings to be longer than this. */
if (size > PY_SSIZE_T_MAX)
@@ -67,13 +103,38 @@ resize_buffer(StringIOObject *self, size_t size)
return -1;
}
-/* Internal routine for writing a string of characters to the buffer of a
- StringIO object. Returns the number of bytes wrote, or -1 on error. */
+/* Internal routine for writing a whole PyUnicode object to the buffer of a
+ StringIO object. Returns 0 on success, or -1 on error. */
static Py_ssize_t
-write_str(StringIOObject *self, const Py_UNICODE *str, Py_ssize_t len)
+write_str(StringIOObject *self, PyObject *obj)
{
+ Py_UNICODE *str;
+ Py_ssize_t len;
+ PyObject *decoded = NULL;
assert(self->buf != NULL);
assert(self->pos >= 0);
+
+ if (self->decoder != NULL) {
+ decoded = _PyIncrementalNewlineDecoder_decode(
+ self->decoder, obj, 1 /* always final */);
+ }
+ else {
+ decoded = obj;
+ Py_INCREF(decoded);
+ }
+ if (self->writenl) {
+ PyObject *translated = PyUnicode_Replace(
+ decoded, _PyIO_str_nl, self->writenl, -1);
+ Py_DECREF(decoded);
+ decoded = translated;
+ }
+ if (decoded == NULL)
+ return -1;
+
+ assert(PyUnicode_Check(decoded));
+ str = PyUnicode_AS_UNICODE(decoded);
+ len = PyUnicode_GET_SIZE(decoded);
+
assert(len >= 0);
/* This overflow check is not strictly necessary. However, it avoids us to
@@ -82,11 +143,11 @@ write_str(StringIOObject *self, const Py_UNICODE *str, Py_ssize_t len)
if (self->pos > PY_SSIZE_T_MAX - len) {
PyErr_SetString(PyExc_OverflowError,
"new position too large");
- return -1;
+ goto fail;
}
if (self->pos + len > self->string_size) {
if (resize_buffer(self, self->pos + len) < 0)
- return -1;
+ goto fail;
}
if (self->pos > self->string_size) {
@@ -108,26 +169,47 @@ write_str(StringIOObject *self, const Py_UNICODE *str, Py_ssize_t len)
memcpy(self->buf + self->pos, str, len * sizeof(Py_UNICODE));
self->pos += len;
- /* Set the new length of the internal string if it has changed */
+ /* Set the new length of the internal string if it has changed. */
if (self->string_size < self->pos) {
self->string_size = self->pos;
}
- return len;
+ Py_DECREF(decoded);
+ return 0;
+
+fail:
+ Py_XDECREF(decoded);
+ return -1;
}
+PyDoc_STRVAR(stringio_getvalue_doc,
+ "Retrieve the entire contents of the object.");
+
static PyObject *
stringio_getvalue(StringIOObject *self)
{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
return PyUnicode_FromUnicode(self->buf, self->string_size);
}
+PyDoc_STRVAR(stringio_tell_doc,
+ "Tell the current file position.");
+
static PyObject *
stringio_tell(StringIOObject *self)
{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
return PyLong_FromSsize_t(self->pos);
}
+PyDoc_STRVAR(stringio_read_doc,
+ "Read at most n characters, returned as a string.\n"
+ "\n"
+ "If the argument is negative or omitted, read until EOF\n"
+ "is reached. Return an empty string at EOF.\n");
+
static PyObject *
stringio_read(StringIOObject *self, PyObject *args)
{
@@ -135,11 +217,13 @@ stringio_read(StringIOObject *self, PyObject *args)
Py_UNICODE *output;
PyObject *arg = Py_None;
+ CHECK_INITIALIZED(self);
if (!PyArg_ParseTuple(args, "|O:read", &arg))
return NULL;
+ CHECK_CLOSED(self);
- if (PyLong_Check(arg)) {
- size = PyLong_AsSsize_t(arg);
+ if (PyNumber_Check(arg)) {
+ size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
if (size == -1 && PyErr_Occurred())
return NULL;
}
@@ -161,24 +245,127 @@ stringio_read(StringIOObject *self, PyObject *args)
size = 0;
}
- assert(self->buf != NULL);
output = self->buf + self->pos;
self->pos += size;
-
return PyUnicode_FromUnicode(output, size);
}
+/* Internal helper, used by stringio_readline and stringio_iternext */
+static PyObject *
+_stringio_readline(StringIOObject *self, Py_ssize_t limit)
+{
+ Py_UNICODE *start, *end, old_char;
+ Py_ssize_t len, consumed;
+
+ /* In case of overseek, return the empty string */
+ if (self->pos >= self->string_size)
+ return PyUnicode_FromString("");
+
+ start = self->buf + self->pos;
+ if (limit < 0 || limit > self->string_size - self->pos)
+ limit = self->string_size - self->pos;
+
+ end = start + limit;
+ old_char = *end;
+ *end = '\0';
+ len = _PyIO_find_line_ending(
+ self->readtranslate, self->readuniversal, self->readnl,
+ start, end, &consumed);
+ *end = old_char;
+ /* If we haven't found any line ending, we just return everything
+ (`consumed` is ignored). */
+ if (len < 0)
+ len = limit;
+ self->pos += len;
+ return PyUnicode_FromUnicode(start, len);
+}
+
+PyDoc_STRVAR(stringio_readline_doc,
+ "Read until newline or EOF.\n"
+ "\n"
+ "Returns an empty string if EOF is hit immediately.\n");
+
+static PyObject *
+stringio_readline(StringIOObject *self, PyObject *args)
+{
+ PyObject *arg = Py_None;
+ Py_ssize_t limit = -1;
+
+ CHECK_INITIALIZED(self);
+ if (!PyArg_ParseTuple(args, "|O:readline", &arg))
+ return NULL;
+ CHECK_CLOSED(self);
+
+ if (PyNumber_Check(arg)) {
+ limit = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
+ if (limit == -1 && PyErr_Occurred())
+ return NULL;
+ }
+ else if (arg != Py_None) {
+ PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
+ Py_TYPE(arg)->tp_name);
+ return NULL;
+ }
+ return _stringio_readline(self, limit);
+}
+
+static PyObject *
+stringio_iternext(StringIOObject *self)
+{
+ PyObject *line;
+
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+
+ if (Py_TYPE(self) == &PyStringIO_Type) {
+ /* Skip method call overhead for speed */
+ line = _stringio_readline(self, -1);
+ }
+ else {
+ /* XXX is subclassing StringIO really supported? */
+ line = PyObject_CallMethodObjArgs((PyObject *)self,
+ _PyIO_str_readline, NULL);
+ if (line && !PyUnicode_Check(line)) {
+ PyErr_Format(PyExc_IOError,
+ "readline() should have returned an str object, "
+ "not '%.200s'", Py_TYPE(line)->tp_name);
+ Py_DECREF(line);
+ return NULL;
+ }
+ }
+
+ if (line == NULL)
+ return NULL;
+
+ if (PyUnicode_GET_SIZE(line) == 0) {
+ /* Reached EOF */
+ Py_DECREF(line);
+ return NULL;
+ }
+
+ return line;
+}
+
+PyDoc_STRVAR(stringio_truncate_doc,
+ "Truncate size to pos.\n"
+ "\n"
+ "The pos argument defaults to the current file position, as\n"
+ "returned by tell(). Imply an absolute seek to pos.\n"
+ "Returns the new absolute position.\n");
+
static PyObject *
stringio_truncate(StringIOObject *self, PyObject *args)
{
Py_ssize_t size;
PyObject *arg = Py_None;
+ CHECK_INITIALIZED(self);
if (!PyArg_ParseTuple(args, "|O:truncate", &arg))
return NULL;
+ CHECK_CLOSED(self);
- if (PyLong_Check(arg)) {
- size = PyLong_AsSsize_t(arg);
+ if (PyNumber_Check(arg)) {
+ size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
if (size == -1 && PyErr_Occurred())
return NULL;
}
@@ -199,23 +386,34 @@ stringio_truncate(StringIOObject *self, PyObject *args)
}
if (size < self->string_size) {
- self->string_size = size;
if (resize_buffer(self, size) < 0)
return NULL;
+ self->string_size = size;
}
self->pos = size;
return PyLong_FromSsize_t(size);
}
+PyDoc_STRVAR(stringio_seek_doc,
+ "Change stream position.\n"
+ "\n"
+ "Seek to character offset pos relative to position indicated by whence:\n"
+ " 0 Start of stream (the default). pos should be >= 0;\n"
+ " 1 Current position - pos must be 0;\n"
+ " 2 End of stream - pos must be 0.\n"
+ "Returns the new absolute position.\n");
+
static PyObject *
stringio_seek(StringIOObject *self, PyObject *args)
{
Py_ssize_t pos;
int mode = 0;
+ CHECK_INITIALIZED(self);
if (!PyArg_ParseTuple(args, "n|i:seek", &pos, &mode))
return NULL;
+ CHECK_CLOSED(self);
if (mode != 0 && mode != 1 && mode != 2) {
PyErr_Format(PyExc_ValueError,
@@ -248,36 +446,76 @@ stringio_seek(StringIOObject *self, PyObject *args)
return PyLong_FromSsize_t(self->pos);
}
+PyDoc_STRVAR(stringio_write_doc,
+ "Write string to file.\n"
+ "\n"
+ "Returns the number of characters written, which is always equal to\n"
+ "the length of the string.\n");
+
static PyObject *
stringio_write(StringIOObject *self, PyObject *obj)
{
- const Py_UNICODE *str;
Py_ssize_t size;
- Py_ssize_t n = 0;
- if (PyUnicode_Check(obj)) {
- str = PyUnicode_AsUnicode(obj);
- size = PyUnicode_GetSize(obj);
- }
- else {
+ CHECK_INITIALIZED(self);
+ if (!PyUnicode_Check(obj)) {
PyErr_Format(PyExc_TypeError, "string argument expected, got '%s'",
Py_TYPE(obj)->tp_name);
return NULL;
}
+ CHECK_CLOSED(self);
+ size = PyUnicode_GET_SIZE(obj);
- if (size != 0) {
- n = write_str(self, str, size);
- if (n < 0)
- return NULL;
- }
+ if (size > 0 && write_str(self, obj) < 0)
+ return NULL;
+
+ return PyLong_FromSsize_t(size);
+}
+
+PyDoc_STRVAR(stringio_close_doc,
+ "Close the IO object. Attempting any further operation after the\n"
+ "object is closed will raise a ValueError.\n"
+ "\n"
+ "This method has no effect if the file is already closed.\n");
+
+static PyObject *
+stringio_close(StringIOObject *self)
+{
+ self->closed = 1;
+ /* Free up some memory */
+ if (resize_buffer(self, 0) < 0)
+ return NULL;
+ Py_CLEAR(self->readnl);
+ Py_CLEAR(self->writenl);
+ Py_CLEAR(self->decoder);
+ Py_RETURN_NONE;
+}
+
+static int
+stringio_traverse(StringIOObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->dict);
+ return 0;
+}
- return PyLong_FromSsize_t(n);
+static int
+stringio_clear(StringIOObject *self)
+{
+ Py_CLEAR(self->dict);
+ return 0;
}
static void
stringio_dealloc(StringIOObject *self)
{
- PyMem_Free(self->buf);
+ _PyObject_GC_UNTRACK(self);
+ Py_CLEAR(self->readnl);
+ Py_CLEAR(self->writenl);
+ Py_CLEAR(self->decoder);
+ if (self->buf)
+ PyMem_Free(self->buf);
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject *) self);
Py_TYPE(self)->tp_free(self);
}
@@ -303,19 +541,194 @@ stringio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
return (PyObject *)self;
}
+static int
+stringio_init(StringIOObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"initial_value", "newline", NULL};
+ PyObject *value = NULL;
+ char *newline = "\n";
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oz:__init__", kwlist,
+ &value, &newline))
+ return -1;
+
+ if (newline && newline[0] != '\0'
+ && !(newline[0] == '\n' && newline[1] == '\0')
+ && !(newline[0] == '\r' && newline[1] == '\0')
+ && !(newline[0] == '\r' && newline[1] == '\n' && newline[2] == '\0')) {
+ PyErr_Format(PyExc_ValueError,
+ "illegal newline value: %s", newline);
+ return -1;
+ }
+ if (value && value != Py_None && !PyUnicode_Check(value)) {
+ PyErr_Format(PyExc_ValueError,
+ "initial_value must be str or None, not %.200s",
+ Py_TYPE(value)->tp_name);
+ return -1;
+ }
+
+ self->ok = 0;
+
+ Py_CLEAR(self->readnl);
+ Py_CLEAR(self->writenl);
+ Py_CLEAR(self->decoder);
+
+ if (newline) {
+ self->readnl = PyUnicode_FromString(newline);
+ if (self->readnl == NULL)
+ return -1;
+ }
+ self->readuniversal = (newline == NULL || newline[0] == '\0');
+ self->readtranslate = (newline == NULL);
+ /* If newline == "", we don't translate anything.
+ If newline == "\n" or newline == None, we translate to "\n", which is
+ a no-op.
+ (for newline == None, TextIOWrapper translates to os.sepline, but it
+ is pointless for StringIO)
+ */
+ if (newline != NULL && newline[0] == '\r') {
+ self->writenl = self->readnl;
+ Py_INCREF(self->writenl);
+ }
+
+ if (self->readuniversal) {
+ self->decoder = PyObject_CallFunction(
+ (PyObject *)&PyIncrementalNewlineDecoder_Type,
+ "Oi", Py_None, (int) self->readtranslate);
+ if (self->decoder == NULL)
+ return -1;
+ }
+
+ /* Now everything is set up, resize buffer to size of initial value,
+ and copy it */
+ self->string_size = 0;
+ if (value && value != Py_None) {
+ Py_ssize_t len = PyUnicode_GetSize(value);
+ /* This is a heuristic, for newline translation might change
+ the string length. */
+ if (resize_buffer(self, len) < 0)
+ return -1;
+ self->pos = 0;
+ if (write_str(self, value) < 0)
+ return -1;
+ }
+ else {
+ if (resize_buffer(self, 0) < 0)
+ return -1;
+ }
+ self->pos = 0;
+
+ self->closed = 0;
+ self->ok = 1;
+ return 0;
+}
+
+/* Properties and pseudo-properties */
+static PyObject *
+stringio_seekable(StringIOObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ Py_RETURN_TRUE;
+}
+
+static PyObject *
+stringio_readable(StringIOObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ Py_RETURN_TRUE;
+}
+
+static PyObject *
+stringio_writable(StringIOObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ Py_RETURN_TRUE;
+}
+
+static PyObject *
+stringio_buffer(StringIOObject *self, void *context)
+{
+ PyErr_SetString(IO_STATE->unsupported_operation,
+ "buffer attribute is unsupported on type StringIO");
+ return NULL;
+}
+
+static PyObject *
+stringio_closed(StringIOObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ return PyBool_FromLong(self->closed);
+}
+
+static PyObject *
+stringio_encoding(StringIOObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+ return PyUnicode_FromString("utf-8");
+}
+
+static PyObject *
+stringio_errors(StringIOObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+ return PyUnicode_FromString("strict");
+}
+
+static PyObject *
+stringio_line_buffering(StringIOObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+ Py_RETURN_FALSE;
+}
+
+static PyObject *
+stringio_newlines(StringIOObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+ if (self->decoder == NULL)
+ Py_RETURN_NONE;
+ return PyObject_GetAttr(self->decoder, _PyIO_str_newlines);
+}
+
static struct PyMethodDef stringio_methods[] = {
- {"getvalue", (PyCFunction)stringio_getvalue, METH_VARARGS, NULL},
- {"read", (PyCFunction)stringio_read, METH_VARARGS, NULL},
- {"tell", (PyCFunction)stringio_tell, METH_NOARGS, NULL},
- {"truncate", (PyCFunction)stringio_truncate, METH_VARARGS, NULL},
- {"seek", (PyCFunction)stringio_seek, METH_VARARGS, NULL},
- {"write", (PyCFunction)stringio_write, METH_O, NULL},
+ {"close", (PyCFunction)stringio_close, METH_NOARGS, stringio_close_doc},
+ {"getvalue", (PyCFunction)stringio_getvalue, METH_VARARGS, stringio_getvalue_doc},
+ {"read", (PyCFunction)stringio_read, METH_VARARGS, stringio_read_doc},
+ {"readline", (PyCFunction)stringio_readline, METH_VARARGS, stringio_readline_doc},
+ {"tell", (PyCFunction)stringio_tell, METH_NOARGS, stringio_tell_doc},
+ {"truncate", (PyCFunction)stringio_truncate, METH_VARARGS, stringio_truncate_doc},
+ {"seek", (PyCFunction)stringio_seek, METH_VARARGS, stringio_seek_doc},
+ {"write", (PyCFunction)stringio_write, METH_O, stringio_write_doc},
+
+ {"seekable", (PyCFunction)stringio_seekable, METH_NOARGS},
+ {"readable", (PyCFunction)stringio_readable, METH_NOARGS},
+ {"writable", (PyCFunction)stringio_writable, METH_NOARGS},
{NULL, NULL} /* sentinel */
};
-static PyTypeObject StringIO_Type = {
+static PyGetSetDef stringio_getset[] = {
+ {"closed", (getter)stringio_closed, NULL, NULL},
+ {"newlines", (getter)stringio_newlines, NULL, NULL},
+ /* (following comments straight off of the original Python wrapper:)
+ XXX Cruft to support the TextIOWrapper API. This would only
+ be meaningful if StringIO supported the buffer attribute.
+ Hopefully, a better solution, than adding these pseudo-attributes,
+ will be found.
+ */
+ {"buffer", (getter)stringio_buffer, NULL, NULL},
+ {"encoding", (getter)stringio_encoding, NULL, NULL},
+ {"errors", (getter)stringio_errors, NULL, NULL},
+ {"line_buffering", (getter)stringio_line_buffering, NULL, NULL},
+ {0}
+};
+
+PyTypeObject PyStringIO_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
- "_stringio._StringIO", /*tp_name*/
+ "_io.StringIO", /*tp_name*/
sizeof(StringIOObject), /*tp_basicsize*/
0, /*tp_itemsize*/
(destructor)stringio_dealloc, /*tp_dealloc*/
@@ -333,51 +746,24 @@ static PyTypeObject StringIO_Type = {
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
- 0, /*tp_doc*/
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ stringio_doc, /*tp_doc*/
+ (traverseproc)stringio_traverse, /*tp_traverse*/
+ (inquiry)stringio_clear, /*tp_clear*/
0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
+ offsetof(StringIOObject, weakreflist), /*tp_weaklistoffset*/
0, /*tp_iter*/
- 0, /*tp_iternext*/
+ (iternextfunc)stringio_iternext, /*tp_iternext*/
stringio_methods, /*tp_methods*/
0, /*tp_members*/
- 0, /*tp_getset*/
+ stringio_getset, /*tp_getset*/
0, /*tp_base*/
0, /*tp_dict*/
0, /*tp_descr_get*/
0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
- 0, /*tp_init*/
+ offsetof(StringIOObject, dict), /*tp_dictoffset*/
+ (initproc)stringio_init, /*tp_init*/
0, /*tp_alloc*/
stringio_new, /*tp_new*/
};
-
-static struct PyModuleDef _stringiomodule = {
- PyModuleDef_HEAD_INIT,
- "_stringio",
- NULL,
- -1,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL
-};
-
-PyMODINIT_FUNC
-PyInit__stringio(void)
-{
- PyObject *m;
-
- if (PyType_Ready(&StringIO_Type) < 0)
- return NULL;
- m = PyModule_Create(&_stringiomodule);
- if (m == NULL)
- return NULL;
- Py_INCREF(&StringIO_Type);
- if (PyModule_AddObject(m, "_StringIO", (PyObject *)&StringIO_Type) < 0)
- return NULL;
- return m;
-}
diff --git a/Modules/_textio.c b/Modules/_textio.c
new file mode 100644
index 0000000..54bf055
--- /dev/null
+++ b/Modules/_textio.c
@@ -0,0 +1,2389 @@
+/*
+ An implementation of Text I/O as defined by PEP 3116 - "New I/O"
+
+ Classes defined here: TextIOBase, IncrementalNewlineDecoder, TextIOWrapper.
+
+ Written by Amaury Forgeot d'Arc and Antoine Pitrou
+*/
+
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+#include "structmember.h"
+#include "_iomodule.h"
+
+/* TextIOBase */
+
+PyDoc_STRVAR(TextIOBase_doc,
+ "Base class for text I/O.\n"
+ "\n"
+ "This class provides a character and line based interface to stream\n"
+ "I/O. There is no readinto method because Python's character strings\n"
+ "are immutable. There is no public constructor.\n"
+ );
+
+static PyObject *
+_unsupported(const char *message)
+{
+ PyErr_SetString(IO_STATE->unsupported_operation, message);
+ return NULL;
+}
+
+PyDoc_STRVAR(TextIOBase_read_doc,
+ "Read at most n characters from stream.\n"
+ "\n"
+ "Read from underlying buffer until we have n characters or we hit EOF.\n"
+ "If n is negative or omitted, read until EOF.\n"
+ );
+
+static PyObject *
+TextIOBase_read(PyObject *self, PyObject *args)
+{
+ return _unsupported("read");
+}
+
+PyDoc_STRVAR(TextIOBase_readline_doc,
+ "Read until newline or EOF.\n"
+ "\n"
+ "Returns an empty string if EOF is hit immediately.\n"
+ );
+
+static PyObject *
+TextIOBase_readline(PyObject *self, PyObject *args)
+{
+ return _unsupported("readline");
+}
+
+PyDoc_STRVAR(TextIOBase_write_doc,
+ "Write string to stream.\n"
+ "Returns the number of characters written (which is always equal to\n"
+ "the length of the string).\n"
+ );
+
+static PyObject *
+TextIOBase_write(PyObject *self, PyObject *args)
+{
+ return _unsupported("write");
+}
+
+PyDoc_STRVAR(TextIOBase_encoding_doc,
+ "Encoding of the text stream.\n"
+ "\n"
+ "Subclasses should override.\n"
+ );
+
+static PyObject *
+TextIOBase_encoding_get(PyObject *self, void *context)
+{
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(TextIOBase_newlines_doc,
+ "Line endings translated so far.\n"
+ "\n"
+ "Only line endings translated during reading are considered.\n"
+ "\n"
+ "Subclasses should override.\n"
+ );
+
+static PyObject *
+TextIOBase_newlines_get(PyObject *self, void *context)
+{
+ Py_RETURN_NONE;
+}
+
+
+static PyMethodDef TextIOBase_methods[] = {
+ {"read", TextIOBase_read, METH_VARARGS, TextIOBase_read_doc},
+ {"readline", TextIOBase_readline, METH_VARARGS, TextIOBase_readline_doc},
+ {"write", TextIOBase_write, METH_VARARGS, TextIOBase_write_doc},
+ {NULL, NULL}
+};
+
+static PyGetSetDef TextIOBase_getset[] = {
+ {"encoding", (getter)TextIOBase_encoding_get, NULL, TextIOBase_encoding_doc},
+ {"newlines", (getter)TextIOBase_newlines_get, NULL, TextIOBase_newlines_doc},
+ {0}
+};
+
+PyTypeObject PyTextIOBase_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io._TextIOBase", /*tp_name*/
+ 0, /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ 0, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ TextIOBase_doc, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ TextIOBase_methods, /* tp_methods */
+ 0, /* tp_members */
+ TextIOBase_getset, /* tp_getset */
+ &PyIOBase_Type, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ 0, /* tp_new */
+};
+
+
+/* IncrementalNewlineDecoder */
+
+PyDoc_STRVAR(IncrementalNewlineDecoder_doc,
+ "Codec used when reading a file in universal newlines mode. It wraps\n"
+ "another incremental decoder, translating \\r\\n and \\r into \\n. It also\n"
+ "records the types of newlines encountered. When used with\n"
+ "translate=False, it ensures that the newline sequence is returned in\n"
+ "one piece. When used with decoder=None, it expects unicode strings as\n"
+ "decode input and translates newlines without first invoking an external\n"
+ "decoder.\n"
+ );
+
+typedef struct {
+ PyObject_HEAD
+ PyObject *decoder;
+ PyObject *errors;
+ int pendingcr:1;
+ int translate:1;
+ unsigned int seennl:3;
+} PyNewLineDecoderObject;
+
+static int
+IncrementalNewlineDecoder_init(PyNewLineDecoderObject *self,
+ PyObject *args, PyObject *kwds)
+{
+ PyObject *decoder;
+ int translate;
+ PyObject *errors = NULL;
+ char *kwlist[] = {"decoder", "translate", "errors", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "Oi|O:IncrementalNewlineDecoder",
+ kwlist, &decoder, &translate, &errors))
+ return -1;
+
+ self->decoder = decoder;
+ Py_INCREF(decoder);
+
+ if (errors == NULL) {
+ self->errors = PyUnicode_FromString("strict");
+ if (self->errors == NULL)
+ return -1;
+ }
+ else {
+ Py_INCREF(errors);
+ self->errors = errors;
+ }
+
+ self->translate = translate;
+ self->seennl = 0;
+ self->pendingcr = 0;
+
+ return 0;
+}
+
+static void
+IncrementalNewlineDecoder_dealloc(PyNewLineDecoderObject *self)
+{
+ Py_CLEAR(self->decoder);
+ Py_CLEAR(self->errors);
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+#define SEEN_CR 1
+#define SEEN_LF 2
+#define SEEN_CRLF 4
+#define SEEN_ALL (SEEN_CR | SEEN_LF | SEEN_CRLF)
+
+PyObject *
+_PyIncrementalNewlineDecoder_decode(PyObject *_self,
+ PyObject *input, int final)
+{
+ PyObject *output;
+ Py_ssize_t output_len;
+ PyNewLineDecoderObject *self = (PyNewLineDecoderObject *) _self;
+
+ if (self->decoder == NULL) {
+ PyErr_SetString(PyExc_ValueError,
+ "IncrementalNewlineDecoder.__init__ not called");
+ return NULL;
+ }
+
+ /* decode input (with the eventual \r from a previous pass) */
+ if (self->decoder != Py_None) {
+ output = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_decode, input, final ? Py_True : Py_False, NULL);
+ }
+ else {
+ output = input;
+ Py_INCREF(output);
+ }
+
+ if (output == NULL)
+ return NULL;
+
+ if (!PyUnicode_Check(output)) {
+ PyErr_SetString(PyExc_TypeError,
+ "decoder should return a string result");
+ goto error;
+ }
+
+ output_len = PyUnicode_GET_SIZE(output);
+ if (self->pendingcr && (final || output_len > 0)) {
+ Py_UNICODE *out;
+ PyObject *modified = PyUnicode_FromUnicode(NULL, output_len + 1);
+ if (modified == NULL)
+ goto error;
+ out = PyUnicode_AS_UNICODE(modified);
+ out[0] = '\r';
+ memcpy(out + 1, PyUnicode_AS_UNICODE(output),
+ output_len * sizeof(Py_UNICODE));
+ Py_DECREF(output);
+ output = modified;
+ self->pendingcr = 0;
+ output_len++;
+ }
+
+ /* retain last \r even when not translating data:
+ * then readline() is sure to get \r\n in one pass
+ */
+ if (!final) {
+ if (output_len > 0
+ && PyUnicode_AS_UNICODE(output)[output_len - 1] == '\r') {
+
+ if (Py_REFCNT(output) == 1) {
+ if (PyUnicode_Resize(&output, output_len - 1) < 0)
+ goto error;
+ }
+ else {
+ PyObject *modified = PyUnicode_FromUnicode(
+ PyUnicode_AS_UNICODE(output),
+ output_len - 1);
+ if (modified == NULL)
+ goto error;
+ Py_DECREF(output);
+ output = modified;
+ }
+ self->pendingcr = 1;
+ }
+ }
+
+ /* Record which newlines are read and do newline translation if desired,
+ all in one pass. */
+ {
+ Py_UNICODE *in_str;
+ Py_ssize_t len;
+ int seennl = self->seennl;
+ int only_lf = 0;
+
+ in_str = PyUnicode_AS_UNICODE(output);
+ len = PyUnicode_GET_SIZE(output);
+
+ if (len == 0)
+ return output;
+
+ /* If, up to now, newlines are consistently \n, do a quick check
+ for the \r *byte* with the libc's optimized memchr.
+ */
+ if (seennl == SEEN_LF || seennl == 0) {
+ int has_cr, has_lf;
+ has_lf = (seennl == SEEN_LF) ||
+ (memchr(in_str, '\n', len * sizeof(Py_UNICODE)) != NULL);
+ has_cr = (memchr(in_str, '\r', len * sizeof(Py_UNICODE)) != NULL);
+ if (has_lf && !has_cr) {
+ only_lf = 1;
+ seennl = SEEN_LF;
+ }
+ }
+
+ if (!self->translate) {
+ Py_UNICODE *s, *end;
+ if (seennl == SEEN_ALL)
+ goto endscan;
+ if (only_lf)
+ goto endscan;
+ s = in_str;
+ end = in_str + len;
+ for (;;) {
+ Py_UNICODE c;
+ /* Fast loop for non-control characters */
+ while (*s > '\r')
+ s++;
+ c = *s++;
+ if (c == '\n')
+ seennl |= SEEN_LF;
+ else if (c == '\r') {
+ if (*s == '\n') {
+ seennl |= SEEN_CRLF;
+ s++;
+ }
+ else
+ seennl |= SEEN_CR;
+ }
+ if (s > end)
+ break;
+ if (seennl == SEEN_ALL)
+ break;
+ }
+ endscan:
+ ;
+ }
+ else if (!only_lf) {
+ PyObject *translated = NULL;
+ Py_UNICODE *out_str;
+ Py_UNICODE *in, *out, *end;
+ if (Py_REFCNT(output) != 1) {
+ /* We could try to optimize this so that we only do a copy
+ when there is something to translate. On the other hand,
+ most decoders should only output non-shared strings, i.e.
+ translation is done in place. */
+ translated = PyUnicode_FromUnicode(NULL, len);
+ if (translated == NULL)
+ goto error;
+ assert(Py_REFCNT(translated) == 1);
+ memcpy(PyUnicode_AS_UNICODE(translated),
+ PyUnicode_AS_UNICODE(output),
+ len * sizeof(Py_UNICODE));
+ }
+ else {
+ translated = output;
+ }
+ out_str = PyUnicode_AS_UNICODE(translated);
+ in = in_str;
+ out = out_str;
+ end = in_str + len;
+ for (;;) {
+ Py_UNICODE c;
+ /* Fast loop for non-control characters */
+ while ((c = *in++) > '\r')
+ *out++ = c;
+ if (c == '\n') {
+ *out++ = c;
+ seennl |= SEEN_LF;
+ continue;
+ }
+ if (c == '\r') {
+ if (*in == '\n') {
+ in++;
+ seennl |= SEEN_CRLF;
+ }
+ else
+ seennl |= SEEN_CR;
+ *out++ = '\n';
+ continue;
+ }
+ if (in > end)
+ break;
+ *out++ = c;
+ }
+ if (translated != output) {
+ Py_DECREF(output);
+ output = translated;
+ }
+ if (out - out_str != len) {
+ if (PyUnicode_Resize(&output, out - out_str) < 0)
+ goto error;
+ }
+ }
+ self->seennl |= seennl;
+ }
+
+ return output;
+
+ error:
+ Py_DECREF(output);
+ return NULL;
+}
+
+static PyObject *
+IncrementalNewlineDecoder_decode(PyNewLineDecoderObject *self,
+ PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"input", "final", NULL};
+ PyObject *input;
+ int final = 0;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|i:IncrementalNewlineDecoder",
+ kwlist, &input, &final))
+ return NULL;
+ return _PyIncrementalNewlineDecoder_decode((PyObject *) self, input, final);
+}
+
+static PyObject *
+IncrementalNewlineDecoder_getstate(PyNewLineDecoderObject *self, PyObject *args)
+{
+ PyObject *buffer;
+ unsigned PY_LONG_LONG flag;
+
+ if (self->decoder != Py_None) {
+ PyObject *state = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_getstate, NULL);
+ if (state == NULL)
+ return NULL;
+ if (!PyArg_Parse(state, "(OK)", &buffer, &flag)) {
+ Py_DECREF(state);
+ return NULL;
+ }
+ Py_INCREF(buffer);
+ Py_DECREF(state);
+ }
+ else {
+ buffer = PyBytes_FromString("");
+ flag = 0;
+ }
+ flag <<= 1;
+ if (self->pendingcr)
+ flag |= 1;
+ return Py_BuildValue("NK", buffer, flag);
+}
+
+static PyObject *
+IncrementalNewlineDecoder_setstate(PyNewLineDecoderObject *self, PyObject *state)
+{
+ PyObject *buffer;
+ unsigned PY_LONG_LONG flag;
+
+ if (!PyArg_Parse(state, "(OK)", &buffer, &flag))
+ return NULL;
+
+ self->pendingcr = (int) flag & 1;
+ flag >>= 1;
+
+ if (self->decoder != Py_None)
+ return PyObject_CallMethod(self->decoder,
+ "setstate", "((OK))", buffer, flag);
+ else
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+IncrementalNewlineDecoder_reset(PyNewLineDecoderObject *self, PyObject *args)
+{
+ self->seennl = 0;
+ self->pendingcr = 0;
+ if (self->decoder != Py_None)
+ return PyObject_CallMethodObjArgs(self->decoder, _PyIO_str_reset, NULL);
+ else
+ Py_RETURN_NONE;
+}
+
+static PyObject *
+IncrementalNewlineDecoder_newlines_get(PyNewLineDecoderObject *self, void *context)
+{
+ switch (self->seennl) {
+ case SEEN_CR:
+ return PyUnicode_FromString("\r");
+ case SEEN_LF:
+ return PyUnicode_FromString("\n");
+ case SEEN_CRLF:
+ return PyUnicode_FromString("\r\n");
+ case SEEN_CR | SEEN_LF:
+ return Py_BuildValue("ss", "\r", "\n");
+ case SEEN_CR | SEEN_CRLF:
+ return Py_BuildValue("ss", "\r", "\r\n");
+ case SEEN_LF | SEEN_CRLF:
+ return Py_BuildValue("ss", "\n", "\r\n");
+ case SEEN_CR | SEEN_LF | SEEN_CRLF:
+ return Py_BuildValue("sss", "\r", "\n", "\r\n");
+ default:
+ Py_RETURN_NONE;
+ }
+
+}
+
+
+static PyMethodDef IncrementalNewlineDecoder_methods[] = {
+ {"decode", (PyCFunction)IncrementalNewlineDecoder_decode, METH_VARARGS|METH_KEYWORDS},
+ {"getstate", (PyCFunction)IncrementalNewlineDecoder_getstate, METH_NOARGS},
+ {"setstate", (PyCFunction)IncrementalNewlineDecoder_setstate, METH_O},
+ {"reset", (PyCFunction)IncrementalNewlineDecoder_reset, METH_NOARGS},
+ {0}
+};
+
+static PyGetSetDef IncrementalNewlineDecoder_getset[] = {
+ {"newlines", (getter)IncrementalNewlineDecoder_newlines_get, NULL, NULL},
+ {0}
+};
+
+PyTypeObject PyIncrementalNewlineDecoder_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.IncrementalNewlineDecoder", /*tp_name*/
+ sizeof(PyNewLineDecoderObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)IncrementalNewlineDecoder_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ IncrementalNewlineDecoder_doc, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ IncrementalNewlineDecoder_methods, /* tp_methods */
+ 0, /* tp_members */
+ IncrementalNewlineDecoder_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)IncrementalNewlineDecoder_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/* TextIOWrapper */
+
+PyDoc_STRVAR(TextIOWrapper_doc,
+ "Character and line based layer over a BufferedIOBase object, buffer.\n"
+ "\n"
+ "encoding gives the name of the encoding that the stream will be\n"
+ "decoded or encoded with. It defaults to locale.getpreferredencoding.\n"
+ "\n"
+ "errors determines the strictness of encoding and decoding (see the\n"
+ "codecs.register) and defaults to \"strict\".\n"
+ "\n"
+ "newline can be None, '', '\\n', '\\r', or '\\r\\n'. It controls the\n"
+ "handling of line endings. If it is None, universal newlines is\n"
+ "enabled. With this enabled, on input, the lines endings '\\n', '\\r',\n"
+ "or '\\r\\n' are translated to '\\n' before being returned to the\n"
+ "caller. Conversely, on output, '\\n' is translated to the system\n"
+ "default line seperator, os.linesep. If newline is any other of its\n"
+ "legal values, that newline becomes the newline when the file is read\n"
+ "and it is returned untranslated. On output, '\\n' is converted to the\n"
+ "newline.\n"
+ "\n"
+ "If line_buffering is True, a call to flush is implied when a call to\n"
+ "write contains a newline character."
+ );
+
+typedef PyObject *
+ (*encodefunc_t)(PyObject *, PyObject *);
+
+typedef struct
+{
+ PyObject_HEAD
+ int ok; /* initialized? */
+ Py_ssize_t chunk_size;
+ PyObject *buffer;
+ PyObject *encoding;
+ PyObject *encoder;
+ PyObject *decoder;
+ PyObject *readnl;
+ PyObject *errors;
+ const char *writenl; /* utf-8 encoded, NULL stands for \n */
+ char line_buffering;
+ char readuniversal;
+ char readtranslate;
+ char writetranslate;
+ char seekable;
+ char telling;
+ /* Specialized encoding func (see below) */
+ encodefunc_t encodefunc;
+
+ /* Reads and writes are internally buffered in order to speed things up.
+ However, any read will first flush the write buffer if itsn't empty.
+
+ Please also note that text to be written is first encoded before being
+ buffered. This is necessary so that encoding errors are immediately
+ reported to the caller, but it unfortunately means that the
+ IncrementalEncoder (whose encode() method is always written in Python)
+ becomes a bottleneck for small writes.
+ */
+ PyObject *decoded_chars; /* buffer for text returned from decoder */
+ Py_ssize_t decoded_chars_used; /* offset into _decoded_chars for read() */
+ PyObject *pending_bytes; /* list of bytes objects waiting to be
+ written, or NULL */
+ Py_ssize_t pending_bytes_count;
+ PyObject *snapshot;
+ /* snapshot is either None, or a tuple (dec_flags, next_input) where
+ * dec_flags is the second (integer) item of the decoder state and
+ * next_input is the chunk of input bytes that comes next after the
+ * snapshot point. We use this to reconstruct decoder states in tell().
+ */
+
+ /* Cache raw object if it's a FileIO object */
+ PyObject *raw;
+
+ PyObject *weakreflist;
+ PyObject *dict;
+} PyTextIOWrapperObject;
+
+
+/* A couple of specialized cases in order to bypass the slow incremental
+ encoding methods for the most popular encodings. */
+
+static PyObject *
+ascii_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ return PyUnicode_EncodeASCII(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors));
+}
+
+static PyObject *
+utf16be_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ return PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors), 1);
+}
+
+static PyObject *
+utf16le_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ return PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors), -1);
+}
+
+static PyObject *
+utf16_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ PyObject *res;
+ res = PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors), 0);
+ if (res == NULL)
+ return NULL;
+ /* Next writes will skip the BOM and use native byte ordering */
+#if defined(WORDS_BIGENDIAN)
+ self->encodefunc = (encodefunc_t) utf16be_encode;
+#else
+ self->encodefunc = (encodefunc_t) utf16le_encode;
+#endif
+ return res;
+}
+
+
+static PyObject *
+utf8_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ return PyUnicode_EncodeUTF8(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors));
+}
+
+static PyObject *
+latin1_encode(PyTextIOWrapperObject *self, PyObject *text)
+{
+ return PyUnicode_EncodeLatin1(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text),
+ PyBytes_AS_STRING(self->errors));
+}
+
+/* Map normalized encoding names onto the specialized encoding funcs */
+
+typedef struct {
+ const char *name;
+ encodefunc_t encodefunc;
+} encodefuncentry;
+
+encodefuncentry encodefuncs[] = {
+ {"ascii", (encodefunc_t) ascii_encode},
+ {"iso8859-1", (encodefunc_t) latin1_encode},
+ {"utf-16-be", (encodefunc_t) utf16be_encode},
+ {"utf-16-le", (encodefunc_t) utf16le_encode},
+ {"utf-16", (encodefunc_t) utf16_encode},
+ {"utf-8", (encodefunc_t) utf8_encode},
+ {NULL, NULL}
+};
+
+
+static int
+TextIOWrapper_init(PyTextIOWrapperObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"buffer", "encoding", "errors",
+ "newline", "line_buffering",
+ NULL};
+ PyObject *buffer, *raw;
+ char *encoding = NULL;
+ char *errors = NULL;
+ char *newline = NULL;
+ int line_buffering = 0;
+ _PyIO_State *state = IO_STATE;
+
+ PyObject *res;
+ int r;
+
+ self->ok = 0;
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|zzzi:fileio",
+ kwlist, &buffer, &encoding, &errors,
+ &newline, &line_buffering))
+ return -1;
+
+ if (newline && newline[0] != '\0'
+ && !(newline[0] == '\n' && newline[1] == '\0')
+ && !(newline[0] == '\r' && newline[1] == '\0')
+ && !(newline[0] == '\r' && newline[1] == '\n' && newline[2] == '\0')) {
+ PyErr_Format(PyExc_ValueError,
+ "illegal newline value: %s", newline);
+ return -1;
+ }
+
+ Py_CLEAR(self->buffer);
+ Py_CLEAR(self->encoding);
+ Py_CLEAR(self->encoder);
+ Py_CLEAR(self->decoder);
+ Py_CLEAR(self->readnl);
+ Py_CLEAR(self->decoded_chars);
+ Py_CLEAR(self->pending_bytes);
+ Py_CLEAR(self->snapshot);
+ Py_CLEAR(self->errors);
+ Py_CLEAR(self->raw);
+ self->decoded_chars_used = 0;
+ self->pending_bytes_count = 0;
+ self->encodefunc = NULL;
+
+ if (encoding == NULL) {
+ /* Try os.device_encoding(fileno) */
+ PyObject *fileno;
+ fileno = PyObject_CallMethod(buffer, "fileno", NULL);
+ /* Ignore only AttributeError and UnsupportedOperation */
+ if (fileno == NULL) {
+ if (PyErr_ExceptionMatches(PyExc_AttributeError) ||
+ PyErr_ExceptionMatches(state->unsupported_operation)) {
+ PyErr_Clear();
+ }
+ else {
+ goto error;
+ }
+ }
+ else {
+ self->encoding = PyObject_CallMethod(state->os_module,
+ "device_encoding",
+ "N", fileno);
+ if (self->encoding == NULL)
+ goto error;
+ else if (!PyUnicode_Check(self->encoding))
+ Py_CLEAR(self->encoding);
+ }
+ }
+ if (encoding == NULL && self->encoding == NULL) {
+ if (state->locale_module == NULL) {
+ state->locale_module = PyImport_ImportModule("locale");
+ if (state->locale_module == NULL)
+ goto catch_ImportError;
+ else
+ goto use_locale;
+ }
+ else {
+ use_locale:
+ self->encoding = PyObject_CallMethod(
+ state->locale_module, "getpreferredencoding", NULL);
+ if (self->encoding == NULL) {
+ catch_ImportError:
+ /*
+ Importing locale can raise a ImportError because of
+ _functools, and locale.getpreferredencoding can raise a
+ ImportError if _locale is not available. These will happen
+ during module building.
+ */
+ if (PyErr_ExceptionMatches(PyExc_ImportError)) {
+ PyErr_Clear();
+ self->encoding = PyUnicode_FromString("ascii");
+ }
+ else
+ goto error;
+ }
+ else if (!PyUnicode_Check(self->encoding))
+ Py_CLEAR(self->encoding);
+ }
+ }
+ if (self->encoding != NULL)
+ encoding = _PyUnicode_AsString(self->encoding);
+ else if (encoding != NULL) {
+ self->encoding = PyUnicode_FromString(encoding);
+ if (self->encoding == NULL)
+ goto error;
+ }
+ else {
+ PyErr_SetString(PyExc_IOError,
+ "could not determine default encoding");
+ }
+
+ if (errors == NULL)
+ errors = "strict";
+ self->errors = PyBytes_FromString(errors);
+ if (self->errors == NULL)
+ goto error;
+
+ self->chunk_size = 8192;
+ self->readuniversal = (newline == NULL || newline[0] == '\0');
+ self->line_buffering = line_buffering;
+ self->readtranslate = (newline == NULL);
+ if (newline) {
+ self->readnl = PyUnicode_FromString(newline);
+ if (self->readnl == NULL)
+ return -1;
+ }
+ self->writetranslate = (newline == NULL || newline[0] != '\0');
+ if (!self->readuniversal && self->readnl) {
+ self->writenl = _PyUnicode_AsString(self->readnl);
+ if (!strcmp(self->writenl, "\n"))
+ self->writenl = NULL;
+ }
+#ifdef MS_WINDOWS
+ else
+ self->writenl = "\r\n";
+#endif
+
+ /* Build the decoder object */
+ res = PyObject_CallMethod(buffer, "readable", NULL);
+ if (res == NULL)
+ goto error;
+ r = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ if (r == -1)
+ goto error;
+ if (r == 1) {
+ self->decoder = PyCodec_IncrementalDecoder(
+ encoding, errors);
+ if (self->decoder == NULL)
+ goto error;
+
+ if (self->readuniversal) {
+ PyObject *incrementalDecoder = PyObject_CallFunction(
+ (PyObject *)&PyIncrementalNewlineDecoder_Type,
+ "Oi", self->decoder, (int)self->readtranslate);
+ if (incrementalDecoder == NULL)
+ goto error;
+ Py_CLEAR(self->decoder);
+ self->decoder = incrementalDecoder;
+ }
+ }
+
+ /* Build the encoder object */
+ res = PyObject_CallMethod(buffer, "writable", NULL);
+ if (res == NULL)
+ goto error;
+ r = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ if (r == -1)
+ goto error;
+ if (r == 1) {
+ PyObject *ci;
+ self->encoder = PyCodec_IncrementalEncoder(
+ encoding, errors);
+ if (self->encoder == NULL)
+ goto error;
+ /* Get the normalized named of the codec */
+ ci = _PyCodec_Lookup(encoding);
+ if (ci == NULL)
+ goto error;
+ res = PyObject_GetAttrString(ci, "name");
+ Py_DECREF(ci);
+ if (res == NULL)
+ PyErr_Clear();
+ else if (PyUnicode_Check(res)) {
+ encodefuncentry *e = encodefuncs;
+ while (e->name != NULL) {
+ if (!PyUnicode_CompareWithASCIIString(res, e->name)) {
+ self->encodefunc = e->encodefunc;
+ break;
+ }
+ e++;
+ }
+ }
+ Py_XDECREF(res);
+ }
+
+ self->buffer = buffer;
+ Py_INCREF(buffer);
+
+ if (Py_TYPE(buffer) == &PyBufferedReader_Type ||
+ Py_TYPE(buffer) == &PyBufferedWriter_Type ||
+ Py_TYPE(buffer) == &PyBufferedRandom_Type) {
+ raw = PyObject_GetAttrString(buffer, "raw");
+ /* Cache the raw FileIO object to speed up 'closed' checks */
+ if (raw == NULL)
+ PyErr_Clear();
+ else if (Py_TYPE(raw) == &PyFileIO_Type)
+ self->raw = raw;
+ else
+ Py_DECREF(raw);
+ }
+
+ res = PyObject_CallMethod(buffer, "seekable", NULL);
+ if (res == NULL)
+ goto error;
+ self->seekable = self->telling = PyObject_IsTrue(res);
+ Py_DECREF(res);
+
+ self->ok = 1;
+ return 0;
+
+ error:
+ return -1;
+}
+
+static int
+_TextIOWrapper_clear(PyTextIOWrapperObject *self)
+{
+ if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0)
+ return -1;
+ self->ok = 0;
+ Py_CLEAR(self->buffer);
+ Py_CLEAR(self->encoding);
+ Py_CLEAR(self->encoder);
+ Py_CLEAR(self->decoder);
+ Py_CLEAR(self->readnl);
+ Py_CLEAR(self->decoded_chars);
+ Py_CLEAR(self->pending_bytes);
+ Py_CLEAR(self->snapshot);
+ Py_CLEAR(self->errors);
+ Py_CLEAR(self->raw);
+ return 0;
+}
+
+static void
+TextIOWrapper_dealloc(PyTextIOWrapperObject *self)
+{
+ if (_TextIOWrapper_clear(self) < 0)
+ return;
+ _PyObject_GC_UNTRACK(self);
+ if (self->weakreflist != NULL)
+ PyObject_ClearWeakRefs((PyObject *)self);
+ Py_CLEAR(self->dict);
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static int
+TextIOWrapper_traverse(PyTextIOWrapperObject *self, visitproc visit, void *arg)
+{
+ Py_VISIT(self->buffer);
+ Py_VISIT(self->encoding);
+ Py_VISIT(self->encoder);
+ Py_VISIT(self->decoder);
+ Py_VISIT(self->readnl);
+ Py_VISIT(self->decoded_chars);
+ Py_VISIT(self->pending_bytes);
+ Py_VISIT(self->snapshot);
+ Py_VISIT(self->errors);
+ Py_VISIT(self->raw);
+
+ Py_VISIT(self->dict);
+ return 0;
+}
+
+static int
+TextIOWrapper_clear(PyTextIOWrapperObject *self)
+{
+ if (_TextIOWrapper_clear(self) < 0)
+ return -1;
+ Py_CLEAR(self->dict);
+ return 0;
+}
+
+static PyObject *
+TextIOWrapper_closed_get(PyTextIOWrapperObject *self, void *context);
+
+/* This macro takes some shortcuts to make the common case faster. */
+#define CHECK_CLOSED(self) \
+ do { \
+ int r; \
+ PyObject *_res; \
+ if (Py_TYPE(self) == &PyTextIOWrapper_Type) { \
+ if (self->raw != NULL) \
+ r = _PyFileIO_closed(self->raw); \
+ else { \
+ _res = TextIOWrapper_closed_get(self, NULL); \
+ if (_res == NULL) \
+ return NULL; \
+ r = PyObject_IsTrue(_res); \
+ Py_DECREF(_res); \
+ if (r < 0) \
+ return NULL; \
+ } \
+ if (r > 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on closed file."); \
+ return NULL; \
+ } \
+ } \
+ else if (_PyIOBase_checkClosed((PyObject *)self, Py_True) == NULL) \
+ return NULL; \
+ } while (0)
+
+#define CHECK_INITIALIZED(self) \
+ if (self->ok <= 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on uninitialized object"); \
+ return NULL; \
+ }
+
+#define CHECK_INITIALIZED_INT(self) \
+ if (self->ok <= 0) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on uninitialized object"); \
+ return -1; \
+ }
+
+
+Py_LOCAL_INLINE(const Py_UNICODE *)
+findchar(const Py_UNICODE *s, Py_ssize_t size, Py_UNICODE ch)
+{
+ /* like wcschr, but doesn't stop at NULL characters */
+ while (size-- > 0) {
+ if (*s == ch)
+ return s;
+ s++;
+ }
+ return NULL;
+}
+
+/* Flush the internal write buffer. This doesn't explicitly flush the
+ underlying buffered object, though. */
+static int
+_TextIOWrapper_writeflush(PyTextIOWrapperObject *self)
+{
+ PyObject *b, *ret;
+
+ if (self->pending_bytes == NULL)
+ return 0;
+ b = _PyBytes_Join(_PyIO_empty_bytes, self->pending_bytes);
+ if (b == NULL)
+ return -1;
+ ret = PyObject_CallMethodObjArgs(self->buffer,
+ _PyIO_str_write, b, NULL);
+ Py_DECREF(b);
+ if (ret == NULL)
+ return -1;
+ Py_DECREF(ret);
+ Py_CLEAR(self->pending_bytes);
+ self->pending_bytes_count = 0;
+ return 0;
+}
+
+static PyObject *
+TextIOWrapper_write(PyTextIOWrapperObject *self, PyObject *args)
+{
+ PyObject *ret;
+ PyObject *text; /* owned reference */
+ PyObject *b;
+ Py_ssize_t textlen;
+ int haslf = 0;
+ int needflush = 0;
+
+ CHECK_INITIALIZED(self);
+
+ if (!PyArg_ParseTuple(args, "U:write", &text)) {
+ return NULL;
+ }
+
+ CHECK_CLOSED(self);
+
+ Py_INCREF(text);
+
+ textlen = PyUnicode_GetSize(text);
+
+ if ((self->writetranslate && self->writenl != NULL) || self->line_buffering)
+ if (findchar(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text), '\n'))
+ haslf = 1;
+
+ if (haslf && self->writetranslate && self->writenl != NULL) {
+ PyObject *newtext = PyObject_CallMethod(
+ text, "replace", "ss", "\n", self->writenl);
+ Py_DECREF(text);
+ if (newtext == NULL)
+ return NULL;
+ text = newtext;
+ }
+
+ if (self->line_buffering &&
+ (haslf ||
+ findchar(PyUnicode_AS_UNICODE(text),
+ PyUnicode_GET_SIZE(text), '\r')))
+ needflush = 1;
+
+ /* XXX What if we were just reading? */
+ if (self->encodefunc != NULL)
+ b = (*self->encodefunc)((PyObject *) self, text);
+ else
+ b = PyObject_CallMethodObjArgs(self->encoder,
+ _PyIO_str_encode, text, NULL);
+ Py_DECREF(text);
+ if (b == NULL)
+ return NULL;
+
+ if (self->pending_bytes == NULL) {
+ self->pending_bytes = PyList_New(0);
+ if (self->pending_bytes == NULL) {
+ Py_DECREF(b);
+ return NULL;
+ }
+ self->pending_bytes_count = 0;
+ }
+ if (PyList_Append(self->pending_bytes, b) < 0) {
+ Py_DECREF(b);
+ return NULL;
+ }
+ self->pending_bytes_count += PyBytes_GET_SIZE(b);
+ Py_DECREF(b);
+ if (self->pending_bytes_count > self->chunk_size || needflush) {
+ if (_TextIOWrapper_writeflush(self) < 0)
+ return NULL;
+ }
+
+ if (needflush) {
+ ret = PyObject_CallMethodObjArgs(self->buffer, _PyIO_str_flush, NULL);
+ if (ret == NULL)
+ return NULL;
+ Py_DECREF(ret);
+ }
+
+ Py_CLEAR(self->snapshot);
+
+ if (self->decoder) {
+ ret = PyObject_CallMethod(self->decoder, "reset", NULL);
+ if (ret == NULL)
+ return NULL;
+ Py_DECREF(ret);
+ }
+
+ return PyLong_FromSsize_t(textlen);
+}
+
+/* Steal a reference to chars and store it in the decoded_char buffer;
+ */
+static void
+TextIOWrapper_set_decoded_chars(PyTextIOWrapperObject *self, PyObject *chars)
+{
+ Py_CLEAR(self->decoded_chars);
+ self->decoded_chars = chars;
+ self->decoded_chars_used = 0;
+}
+
+static PyObject *
+TextIOWrapper_get_decoded_chars(PyTextIOWrapperObject *self, Py_ssize_t n)
+{
+ PyObject *chars;
+ Py_ssize_t avail;
+
+ if (self->decoded_chars == NULL)
+ return PyUnicode_FromStringAndSize(NULL, 0);
+
+ avail = (PyUnicode_GET_SIZE(self->decoded_chars)
+ - self->decoded_chars_used);
+
+ assert(avail >= 0);
+
+ if (n < 0 || n > avail)
+ n = avail;
+
+ if (self->decoded_chars_used > 0 || n < avail) {
+ chars = PyUnicode_FromUnicode(
+ PyUnicode_AS_UNICODE(self->decoded_chars)
+ + self->decoded_chars_used, n);
+ if (chars == NULL)
+ return NULL;
+ }
+ else {
+ chars = self->decoded_chars;
+ Py_INCREF(chars);
+ }
+
+ self->decoded_chars_used += n;
+ return chars;
+}
+
+/* Read and decode the next chunk of data from the BufferedReader.
+ */
+static int
+TextIOWrapper_read_chunk(PyTextIOWrapperObject *self)
+{
+ PyObject *dec_buffer = NULL;
+ PyObject *dec_flags = NULL;
+ PyObject *input_chunk = NULL;
+ PyObject *decoded_chars, *chunk_size;
+ int eof;
+
+ /* The return value is True unless EOF was reached. The decoded string is
+ * placed in self._decoded_chars (replacing its previous value). The
+ * entire input chunk is sent to the decoder, though some of it may remain
+ * buffered in the decoder, yet to be converted.
+ */
+
+ if (self->decoder == NULL) {
+ PyErr_SetString(PyExc_ValueError, "no decoder");
+ return -1;
+ }
+
+ if (self->telling) {
+ /* To prepare for tell(), we need to snapshot a point in the file
+ * where the decoder's input buffer is empty.
+ */
+
+ PyObject *state = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_getstate, NULL);
+ if (state == NULL)
+ return -1;
+ /* Given this, we know there was a valid snapshot point
+ * len(dec_buffer) bytes ago with decoder state (b'', dec_flags).
+ */
+ if (PyArg_Parse(state, "(OO)", &dec_buffer, &dec_flags) < 0) {
+ Py_DECREF(state);
+ return -1;
+ }
+ Py_INCREF(dec_buffer);
+ Py_INCREF(dec_flags);
+ Py_DECREF(state);
+ }
+
+ /* Read a chunk, decode it, and put the result in self._decoded_chars. */
+ chunk_size = PyLong_FromSsize_t(self->chunk_size);
+ if (chunk_size == NULL)
+ goto fail;
+ input_chunk = PyObject_CallMethodObjArgs(self->buffer,
+ _PyIO_str_read1, chunk_size, NULL);
+ Py_DECREF(chunk_size);
+ if (input_chunk == NULL)
+ goto fail;
+ assert(PyBytes_Check(input_chunk));
+
+ eof = (PyBytes_Size(input_chunk) == 0);
+
+ if (Py_TYPE(self->decoder) == &PyIncrementalNewlineDecoder_Type) {
+ decoded_chars = _PyIncrementalNewlineDecoder_decode(
+ self->decoder, input_chunk, eof);
+ }
+ else {
+ decoded_chars = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_decode, input_chunk, eof ? Py_True : Py_False, NULL);
+ }
+
+ /* TODO sanity check: isinstance(decoded_chars, unicode) */
+ if (decoded_chars == NULL)
+ goto fail;
+ TextIOWrapper_set_decoded_chars(self, decoded_chars);
+ if (PyUnicode_GET_SIZE(decoded_chars) > 0)
+ eof = 0;
+
+ if (self->telling) {
+ /* At the snapshot point, len(dec_buffer) bytes before the read, the
+ * next input to be decoded is dec_buffer + input_chunk.
+ */
+ PyObject *next_input = PyNumber_Add(dec_buffer, input_chunk);
+ if (next_input == NULL)
+ goto fail;
+ assert (PyBytes_Check(next_input));
+ Py_DECREF(dec_buffer);
+ Py_CLEAR(self->snapshot);
+ self->snapshot = Py_BuildValue("NN", dec_flags, next_input);
+ }
+ Py_DECREF(input_chunk);
+
+ return (eof == 0);
+
+ fail:
+ Py_XDECREF(dec_buffer);
+ Py_XDECREF(dec_flags);
+ Py_XDECREF(input_chunk);
+ return -1;
+}
+
+static PyObject *
+TextIOWrapper_read(PyTextIOWrapperObject *self, PyObject *args)
+{
+ Py_ssize_t n = -1;
+ PyObject *result = NULL, *chunks = NULL;
+
+ CHECK_INITIALIZED(self);
+
+ if (!PyArg_ParseTuple(args, "|n:read", &n))
+ return NULL;
+
+ CHECK_CLOSED(self);
+
+ if (_TextIOWrapper_writeflush(self) < 0)
+ return NULL;
+
+ if (n < 0) {
+ /* Read everything */
+ PyObject *bytes = PyObject_CallMethod(self->buffer, "read", NULL);
+ PyObject *decoded;
+ if (bytes == NULL)
+ goto fail;
+ decoded = PyObject_CallMethodObjArgs(self->decoder, _PyIO_str_decode,
+ bytes, Py_True, NULL);
+ Py_DECREF(bytes);
+ if (decoded == NULL)
+ goto fail;
+
+ result = TextIOWrapper_get_decoded_chars(self, -1);
+
+ if (result == NULL) {
+ Py_DECREF(decoded);
+ return NULL;
+ }
+
+ PyUnicode_AppendAndDel(&result, decoded);
+ if (result == NULL)
+ goto fail;
+
+ Py_CLEAR(self->snapshot);
+ return result;
+ }
+ else {
+ int res = 1;
+ Py_ssize_t remaining = n;
+
+ result = TextIOWrapper_get_decoded_chars(self, n);
+ if (result == NULL)
+ goto fail;
+ remaining -= PyUnicode_GET_SIZE(result);
+
+ /* Keep reading chunks until we have n characters to return */
+ while (remaining > 0) {
+ res = TextIOWrapper_read_chunk(self);
+ if (res < 0)
+ goto fail;
+ if (res == 0) /* EOF */
+ break;
+ if (chunks == NULL) {
+ chunks = PyList_New(0);
+ if (chunks == NULL)
+ goto fail;
+ }
+ if (PyList_Append(chunks, result) < 0)
+ goto fail;
+ Py_DECREF(result);
+ result = TextIOWrapper_get_decoded_chars(self, remaining);
+ if (result == NULL)
+ goto fail;
+ remaining -= PyUnicode_GET_SIZE(result);
+ }
+ if (chunks != NULL) {
+ if (result != NULL && PyList_Append(chunks, result) < 0)
+ goto fail;
+ Py_CLEAR(result);
+ result = PyUnicode_Join(_PyIO_empty_str, chunks);
+ if (result == NULL)
+ goto fail;
+ Py_CLEAR(chunks);
+ }
+ return result;
+ }
+ fail:
+ Py_XDECREF(result);
+ Py_XDECREF(chunks);
+ return NULL;
+}
+
+
+/* NOTE: `end` must point to the real end of the Py_UNICODE storage,
+ that is to the NUL character. Otherwise the function will produce
+ incorrect results. */
+static Py_UNICODE *
+find_control_char(Py_UNICODE *start, Py_UNICODE *end, Py_UNICODE ch)
+{
+ Py_UNICODE *s = start;
+ for (;;) {
+ while (*s > ch)
+ s++;
+ if (*s == ch)
+ return s;
+ if (s == end)
+ return NULL;
+ s++;
+ }
+}
+
+Py_ssize_t
+_PyIO_find_line_ending(
+ int translated, int universal, PyObject *readnl,
+ Py_UNICODE *start, Py_UNICODE *end, Py_ssize_t *consumed)
+{
+ Py_ssize_t len = end - start;
+
+ if (translated) {
+ /* Newlines are already translated, only search for \n */
+ Py_UNICODE *pos = find_control_char(start, end, '\n');
+ if (pos != NULL)
+ return pos - start + 1;
+ else {
+ *consumed = len;
+ return -1;
+ }
+ }
+ else if (universal) {
+ /* Universal newline search. Find any of \r, \r\n, \n
+ * The decoder ensures that \r\n are not split in two pieces
+ */
+ Py_UNICODE *s = start;
+ for (;;) {
+ Py_UNICODE ch;
+ /* Fast path for non-control chars. The loop always ends
+ since the Py_UNICODE storage is NUL-terminated. */
+ while (*s > '\r')
+ s++;
+ if (s >= end) {
+ *consumed = len;
+ return -1;
+ }
+ ch = *s++;
+ if (ch == '\n')
+ return s - start;
+ if (ch == '\r') {
+ if (*s == '\n')
+ return s - start + 1;
+ else
+ return s - start;
+ }
+ }
+ }
+ else {
+ /* Non-universal mode. */
+ Py_ssize_t readnl_len = PyUnicode_GET_SIZE(readnl);
+ Py_UNICODE *nl = PyUnicode_AS_UNICODE(readnl);
+ if (readnl_len == 1) {
+ Py_UNICODE *pos = find_control_char(start, end, nl[0]);
+ if (pos != NULL)
+ return pos - start + 1;
+ *consumed = len;
+ return -1;
+ }
+ else {
+ Py_UNICODE *s = start;
+ Py_UNICODE *e = end - readnl_len + 1;
+ Py_UNICODE *pos;
+ if (e < s)
+ e = s;
+ while (s < e) {
+ Py_ssize_t i;
+ Py_UNICODE *pos = find_control_char(s, end, nl[0]);
+ if (pos == NULL || pos >= e)
+ break;
+ for (i = 1; i < readnl_len; i++) {
+ if (pos[i] != nl[i])
+ break;
+ }
+ if (i == readnl_len)
+ return pos - start + readnl_len;
+ s = pos + 1;
+ }
+ pos = find_control_char(e, end, nl[0]);
+ if (pos == NULL)
+ *consumed = len;
+ else
+ *consumed = pos - start;
+ return -1;
+ }
+ }
+}
+
+static PyObject *
+_TextIOWrapper_readline(PyTextIOWrapperObject *self, Py_ssize_t limit)
+{
+ PyObject *line = NULL, *chunks = NULL, *remaining = NULL;
+ Py_ssize_t start, endpos, chunked, offset_to_buffer;
+ int res;
+
+ CHECK_CLOSED(self);
+
+ if (_TextIOWrapper_writeflush(self) < 0)
+ return NULL;
+
+ chunked = 0;
+
+ while (1) {
+ Py_UNICODE *ptr;
+ Py_ssize_t line_len;
+ Py_ssize_t consumed = 0;
+
+ /* First, get some data if necessary */
+ res = 1;
+ while (!self->decoded_chars ||
+ !PyUnicode_GET_SIZE(self->decoded_chars)) {
+ res = TextIOWrapper_read_chunk(self);
+ if (res < 0)
+ goto error;
+ if (res == 0)
+ break;
+ }
+ if (res == 0) {
+ /* end of file */
+ TextIOWrapper_set_decoded_chars(self, NULL);
+ Py_CLEAR(self->snapshot);
+ start = endpos = offset_to_buffer = 0;
+ break;
+ }
+
+ if (remaining == NULL) {
+ line = self->decoded_chars;
+ start = self->decoded_chars_used;
+ offset_to_buffer = 0;
+ Py_INCREF(line);
+ }
+ else {
+ assert(self->decoded_chars_used == 0);
+ line = PyUnicode_Concat(remaining, self->decoded_chars);
+ start = 0;
+ offset_to_buffer = PyUnicode_GET_SIZE(remaining);
+ Py_CLEAR(remaining);
+ if (line == NULL)
+ goto error;
+ }
+
+ ptr = PyUnicode_AS_UNICODE(line);
+ line_len = PyUnicode_GET_SIZE(line);
+
+ endpos = _PyIO_find_line_ending(
+ self->readtranslate, self->readuniversal, self->readnl,
+ ptr + start, ptr + line_len, &consumed);
+ if (endpos >= 0) {
+ endpos += start;
+ if (limit >= 0 && (endpos - start) + chunked >= limit)
+ endpos = start + limit - chunked;
+ break;
+ }
+
+ /* We can put aside up to `endpos` */
+ endpos = consumed + start;
+ if (limit >= 0 && (endpos - start) + chunked >= limit) {
+ /* Didn't find line ending, but reached length limit */
+ endpos = start + limit - chunked;
+ break;
+ }
+
+ if (endpos > start) {
+ /* No line ending seen yet - put aside current data */
+ PyObject *s;
+ if (chunks == NULL) {
+ chunks = PyList_New(0);
+ if (chunks == NULL)
+ goto error;
+ }
+ s = PyUnicode_FromUnicode(ptr + start, endpos - start);
+ if (s == NULL)
+ goto error;
+ if (PyList_Append(chunks, s) < 0) {
+ Py_DECREF(s);
+ goto error;
+ }
+ chunked += PyUnicode_GET_SIZE(s);
+ Py_DECREF(s);
+ }
+ /* There may be some remaining bytes we'll have to prepend to the
+ next chunk of data */
+ if (endpos < line_len) {
+ remaining = PyUnicode_FromUnicode(
+ ptr + endpos, line_len - endpos);
+ if (remaining == NULL)
+ goto error;
+ }
+ Py_CLEAR(line);
+ /* We have consumed the buffer */
+ TextIOWrapper_set_decoded_chars(self, NULL);
+ }
+
+ if (line != NULL) {
+ /* Our line ends in the current buffer */
+ self->decoded_chars_used = endpos - offset_to_buffer;
+ if (start > 0 || endpos < PyUnicode_GET_SIZE(line)) {
+ if (start == 0 && Py_REFCNT(line) == 1) {
+ if (PyUnicode_Resize(&line, endpos) < 0)
+ goto error;
+ }
+ else {
+ PyObject *s = PyUnicode_FromUnicode(
+ PyUnicode_AS_UNICODE(line) + start, endpos - start);
+ Py_CLEAR(line);
+ if (s == NULL)
+ goto error;
+ line = s;
+ }
+ }
+ }
+ if (remaining != NULL) {
+ if (chunks == NULL) {
+ chunks = PyList_New(0);
+ if (chunks == NULL)
+ goto error;
+ }
+ if (PyList_Append(chunks, remaining) < 0)
+ goto error;
+ Py_CLEAR(remaining);
+ }
+ if (chunks != NULL) {
+ if (line != NULL && PyList_Append(chunks, line) < 0)
+ goto error;
+ Py_CLEAR(line);
+ line = PyUnicode_Join(_PyIO_empty_str, chunks);
+ if (line == NULL)
+ goto error;
+ Py_DECREF(chunks);
+ }
+ if (line == NULL)
+ line = PyUnicode_FromStringAndSize(NULL, 0);
+
+ return line;
+
+ error:
+ Py_XDECREF(chunks);
+ Py_XDECREF(remaining);
+ Py_XDECREF(line);
+ return NULL;
+}
+
+static PyObject *
+TextIOWrapper_readline(PyTextIOWrapperObject *self, PyObject *args)
+{
+ Py_ssize_t limit = -1;
+
+ CHECK_INITIALIZED(self);
+ if (!PyArg_ParseTuple(args, "|n:readline", &limit)) {
+ return NULL;
+ }
+ return _TextIOWrapper_readline(self, limit);
+}
+
+/* Seek and Tell */
+
+typedef struct {
+ Py_off_t start_pos;
+ int dec_flags;
+ int bytes_to_feed;
+ int chars_to_skip;
+ char need_eof;
+} CookieStruct;
+
+/*
+ To speed up cookie packing/unpacking, we store the fields in a temporary
+ string and call _PyLong_FromByteArray() or _PyLong_AsByteArray (resp.).
+ The following macros define at which offsets in the intermediary byte
+ string the various CookieStruct fields will be stored.
+ */
+
+#define COOKIE_BUF_LEN (sizeof(Py_off_t) + 3 * sizeof(int) + sizeof(char))
+
+#if defined(WORDS_BIGENDIAN)
+
+# define IS_LITTLE_ENDIAN 0
+
+/* We want the least significant byte of start_pos to also be the least
+ significant byte of the cookie, which means that in big-endian mode we
+ must copy the fields in reverse order. */
+
+# define OFF_START_POS (sizeof(char) + 3 * sizeof(int))
+# define OFF_DEC_FLAGS (sizeof(char) + 2 * sizeof(int))
+# define OFF_BYTES_TO_FEED (sizeof(char) + sizeof(int))
+# define OFF_CHARS_TO_SKIP (sizeof(char))
+# define OFF_NEED_EOF 0
+
+#else
+
+# define IS_LITTLE_ENDIAN 1
+
+/* Little-endian mode: the least significant byte of start_pos will
+ naturally end up the least significant byte of the cookie. */
+
+# define OFF_START_POS 0
+# define OFF_DEC_FLAGS (sizeof(Py_off_t))
+# define OFF_BYTES_TO_FEED (sizeof(Py_off_t) + sizeof(int))
+# define OFF_CHARS_TO_SKIP (sizeof(Py_off_t) + 2 * sizeof(int))
+# define OFF_NEED_EOF (sizeof(Py_off_t) + 3 * sizeof(int))
+
+#endif
+
+static int
+TextIOWrapper_parseCookie(CookieStruct *cookie, PyObject *cookieObj)
+{
+ unsigned char buffer[COOKIE_BUF_LEN];
+ PyLongObject *cookieLong = (PyLongObject *)PyNumber_Long(cookieObj);
+ if (cookieLong == NULL)
+ return -1;
+
+ if (_PyLong_AsByteArray(cookieLong, buffer, sizeof(buffer),
+ IS_LITTLE_ENDIAN, 0) < 0) {
+ Py_DECREF(cookieLong);
+ return -1;
+ }
+ Py_DECREF(cookieLong);
+
+ cookie->start_pos = * (Py_off_t *)(buffer + OFF_START_POS);
+ cookie->dec_flags = * (int *) (buffer + OFF_DEC_FLAGS);
+ cookie->bytes_to_feed = * (int *) (buffer + OFF_BYTES_TO_FEED);
+ cookie->chars_to_skip = * (int *) (buffer + OFF_CHARS_TO_SKIP);
+ cookie->need_eof = * (char *) (buffer + OFF_NEED_EOF);
+
+ return 0;
+}
+
+static PyObject *
+TextIOWrapper_buildCookie(CookieStruct *cookie)
+{
+ unsigned char buffer[COOKIE_BUF_LEN];
+
+ * (Py_off_t *)(buffer + OFF_START_POS) = cookie->start_pos;
+ * (int *) (buffer + OFF_DEC_FLAGS) = cookie->dec_flags;
+ * (int *) (buffer + OFF_BYTES_TO_FEED) = cookie->bytes_to_feed;
+ * (int *) (buffer + OFF_CHARS_TO_SKIP) = cookie->chars_to_skip;
+ * (char *) (buffer + OFF_NEED_EOF) = cookie->need_eof;
+
+ return _PyLong_FromByteArray(buffer, sizeof(buffer), IS_LITTLE_ENDIAN, 0);
+}
+#undef IS_LITTLE_ENDIAN
+
+static int
+_TextIOWrapper_decoder_setstate(PyTextIOWrapperObject *self,
+ CookieStruct *cookie)
+{
+ PyObject *res;
+ /* When seeking to the start of the stream, we call decoder.reset()
+ rather than decoder.getstate().
+ This is for a few decoders such as utf-16 for which the state value
+ at start is not (b"", 0) but e.g. (b"", 2) (meaning, in the case of
+ utf-16, that we are expecting a BOM).
+ */
+ if (cookie->start_pos == 0 && cookie->dec_flags == 0)
+ res = PyObject_CallMethodObjArgs(self->decoder, _PyIO_str_reset, NULL);
+ else
+ res = PyObject_CallMethod(self->decoder, "setstate",
+ "((yi))", "", cookie->dec_flags);
+ if (res == NULL)
+ return -1;
+ Py_DECREF(res);
+ return 0;
+}
+
+static PyObject *
+TextIOWrapper_seek(PyTextIOWrapperObject *self, PyObject *args)
+{
+ PyObject *cookieObj, *posobj;
+ CookieStruct cookie;
+ int whence = 0;
+ static PyObject *zero = NULL;
+ PyObject *res;
+ int cmp;
+
+ CHECK_INITIALIZED(self);
+
+ if (zero == NULL) {
+ zero = PyLong_FromLong(0L);
+ if (zero == NULL)
+ return NULL;
+ }
+
+ if (!PyArg_ParseTuple(args, "O|i:seek", &cookieObj, &whence))
+ return NULL;
+ CHECK_CLOSED(self);
+
+ Py_INCREF(cookieObj);
+
+ if (!self->seekable) {
+ PyErr_SetString(PyExc_IOError,
+ "underlying stream is not seekable");
+ goto fail;
+ }
+
+ if (whence == 1) {
+ /* seek relative to current position */
+ cmp = PyObject_RichCompareBool(cookieObj, zero, Py_EQ);
+ if (cmp < 0)
+ goto fail;
+
+ if (cmp == 0) {
+ PyErr_SetString(PyExc_IOError,
+ "can't do nonzero cur-relative seeks");
+ goto fail;
+ }
+
+ /* Seeking to the current position should attempt to
+ * sync the underlying buffer with the current position.
+ */
+ Py_DECREF(cookieObj);
+ cookieObj = PyObject_CallMethod((PyObject *)self, "tell", NULL);
+ if (cookieObj == NULL)
+ goto fail;
+ }
+ else if (whence == 2) {
+ /* seek relative to end of file */
+
+ cmp = PyObject_RichCompareBool(cookieObj, zero, Py_EQ);
+ if (cmp < 0)
+ goto fail;
+
+ if (cmp == 0) {
+ PyErr_SetString(PyExc_IOError,
+ "can't do nonzero end-relative seeks");
+ goto fail;
+ }
+
+ res = PyObject_CallMethod((PyObject *)self, "flush", NULL);
+ if (res == NULL)
+ goto fail;
+ Py_DECREF(res);
+
+ TextIOWrapper_set_decoded_chars(self, NULL);
+ Py_CLEAR(self->snapshot);
+ if (self->decoder) {
+ res = PyObject_CallMethod(self->decoder, "reset", NULL);
+ if (res == NULL)
+ goto fail;
+ Py_DECREF(res);
+ }
+
+ res = PyObject_CallMethod(self->buffer, "seek", "ii", 0, 2);
+ Py_XDECREF(cookieObj);
+ return res;
+ }
+ else if (whence != 0) {
+ PyErr_Format(PyExc_ValueError,
+ "invalid whence (%d, should be 0, 1 or 2)", whence);
+ goto fail;
+ }
+
+ cmp = PyObject_RichCompareBool(cookieObj, zero, Py_LT);
+ if (cmp < 0)
+ goto fail;
+
+ if (cmp == 1) {
+ PyErr_Format(PyExc_ValueError,
+ "negative seek position %R", cookieObj);
+ goto fail;
+ }
+
+ res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL);
+ if (res == NULL)
+ goto fail;
+ Py_DECREF(res);
+
+ /* The strategy of seek() is to go back to the safe start point
+ * and replay the effect of read(chars_to_skip) from there.
+ */
+ if (TextIOWrapper_parseCookie(&cookie, cookieObj) < 0)
+ goto fail;
+
+ /* Seek back to the safe start point. */
+ posobj = PyLong_FromOff_t(cookie.start_pos);
+ if (posobj == NULL)
+ goto fail;
+ res = PyObject_CallMethodObjArgs(self->buffer,
+ _PyIO_str_seek, posobj, NULL);
+ Py_DECREF(posobj);
+ if (res == NULL)
+ goto fail;
+ Py_DECREF(res);
+
+ TextIOWrapper_set_decoded_chars(self, NULL);
+ Py_CLEAR(self->snapshot);
+
+ /* Restore the decoder to its state from the safe start point. */
+ if (self->decoder) {
+ if (_TextIOWrapper_decoder_setstate(self, &cookie) < 0)
+ goto fail;
+ }
+
+ if (cookie.chars_to_skip) {
+ /* Just like _read_chunk, feed the decoder and save a snapshot. */
+ PyObject *input_chunk = PyObject_CallMethod(
+ self->buffer, "read", "i", cookie.bytes_to_feed);
+ PyObject *decoded;
+
+ if (input_chunk == NULL)
+ goto fail;
+
+ assert (PyBytes_Check(input_chunk));
+
+ self->snapshot = Py_BuildValue("iN", cookie.dec_flags, input_chunk);
+ if (self->snapshot == NULL) {
+ Py_DECREF(input_chunk);
+ goto fail;
+ }
+
+ decoded = PyObject_CallMethod(self->decoder, "decode",
+ "Oi", input_chunk, (int)cookie.need_eof);
+
+ if (decoded == NULL)
+ goto fail;
+
+ TextIOWrapper_set_decoded_chars(self, decoded);
+
+ /* Skip chars_to_skip of the decoded characters. */
+ if (PyUnicode_GetSize(self->decoded_chars) < cookie.chars_to_skip) {
+ PyErr_SetString(PyExc_IOError, "can't restore logical file position");
+ goto fail;
+ }
+ self->decoded_chars_used = cookie.chars_to_skip;
+ }
+ else {
+ self->snapshot = Py_BuildValue("iy", cookie.dec_flags, "");
+ if (self->snapshot == NULL)
+ goto fail;
+ }
+
+ return cookieObj;
+ fail:
+ Py_XDECREF(cookieObj);
+ return NULL;
+
+}
+
+static PyObject *
+TextIOWrapper_tell(PyTextIOWrapperObject *self, PyObject *args)
+{
+ PyObject *res;
+ PyObject *posobj = NULL;
+ CookieStruct cookie = {0,0,0,0,0};
+ PyObject *next_input;
+ Py_ssize_t chars_to_skip, chars_decoded;
+ PyObject *saved_state = NULL;
+ char *input, *input_end;
+
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+
+ if (!self->seekable) {
+ PyErr_SetString(PyExc_IOError,
+ "underlying stream is not seekable");
+ goto fail;
+ }
+ if (!self->telling) {
+ PyErr_SetString(PyExc_IOError,
+ "telling position disabled by next() call");
+ goto fail;
+ }
+
+ if (_TextIOWrapper_writeflush(self) < 0)
+ return NULL;
+ res = PyObject_CallMethod((PyObject *)self, "flush", NULL);
+ if (res == NULL)
+ goto fail;
+ Py_DECREF(res);
+
+ posobj = PyObject_CallMethod(self->buffer, "tell", NULL);
+ if (posobj == NULL)
+ goto fail;
+
+ if (self->decoder == NULL || self->snapshot == NULL) {
+ assert (self->decoded_chars == NULL || PyUnicode_GetSize(self->decoded_chars) == 0);
+ return posobj;
+ }
+
+#if defined(HAVE_LARGEFILE_SUPPORT)
+ cookie.start_pos = PyLong_AsLongLong(posobj);
+#else
+ cookie.start_pos = PyLong_AsLong(posobj);
+#endif
+ if (PyErr_Occurred())
+ goto fail;
+
+ /* Skip backward to the snapshot point (see _read_chunk). */
+ if (!PyArg_Parse(self->snapshot, "(iO)", &cookie.dec_flags, &next_input))
+ goto fail;
+
+ assert (PyBytes_Check(next_input));
+
+ cookie.start_pos -= PyBytes_GET_SIZE(next_input);
+
+ /* How many decoded characters have been used up since the snapshot? */
+ if (self->decoded_chars_used == 0) {
+ /* We haven't moved from the snapshot point. */
+ Py_DECREF(posobj);
+ return TextIOWrapper_buildCookie(&cookie);
+ }
+
+ chars_to_skip = self->decoded_chars_used;
+
+ /* Starting from the snapshot position, we will walk the decoder
+ * forward until it gives us enough decoded characters.
+ */
+ saved_state = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_getstate, NULL);
+ if (saved_state == NULL)
+ goto fail;
+
+ /* Note our initial start point. */
+ if (_TextIOWrapper_decoder_setstate(self, &cookie) < 0)
+ goto fail;
+
+ /* Feed the decoder one byte at a time. As we go, note the
+ * nearest "safe start point" before the current location
+ * (a point where the decoder has nothing buffered, so seek()
+ * can safely start from there and advance to this location).
+ */
+ chars_decoded = 0;
+ input = PyBytes_AS_STRING(next_input);
+ input_end = input + PyBytes_GET_SIZE(next_input);
+ while (input < input_end) {
+ PyObject *state;
+ char *dec_buffer;
+ Py_ssize_t dec_buffer_len;
+ int dec_flags;
+
+ PyObject *decoded = PyObject_CallMethod(
+ self->decoder, "decode", "y#", input, 1);
+ if (decoded == NULL)
+ goto fail;
+ assert (PyUnicode_Check(decoded));
+ chars_decoded += PyUnicode_GET_SIZE(decoded);
+ Py_DECREF(decoded);
+
+ cookie.bytes_to_feed += 1;
+
+ state = PyObject_CallMethodObjArgs(self->decoder,
+ _PyIO_str_getstate, NULL);
+ if (state == NULL)
+ goto fail;
+ if (!PyArg_Parse(state, "(y#i)", &dec_buffer, &dec_buffer_len, &dec_flags)) {
+ Py_DECREF(state);
+ goto fail;
+ }
+ Py_DECREF(state);
+
+ if (dec_buffer_len == 0 && chars_decoded <= chars_to_skip) {
+ /* Decoder buffer is empty, so this is a safe start point. */
+ cookie.start_pos += cookie.bytes_to_feed;
+ chars_to_skip -= chars_decoded;
+ cookie.dec_flags = dec_flags;
+ cookie.bytes_to_feed = 0;
+ chars_decoded = 0;
+ }
+ if (chars_decoded >= chars_to_skip)
+ break;
+ input++;
+ }
+ if (input == input_end) {
+ /* We didn't get enough decoded data; signal EOF to get more. */
+ PyObject *decoded = PyObject_CallMethod(
+ self->decoder, "decode", "yi", "", /* final = */ 1);
+ if (decoded == NULL)
+ goto fail;
+ assert (PyUnicode_Check(decoded));
+ chars_decoded += PyUnicode_GET_SIZE(decoded);
+ Py_DECREF(decoded);
+ cookie.need_eof = 1;
+
+ if (chars_decoded < chars_to_skip) {
+ PyErr_SetString(PyExc_IOError,
+ "can't reconstruct logical file position");
+ goto fail;
+ }
+ }
+
+ /* finally */
+ Py_XDECREF(posobj);
+ res = PyObject_CallMethod(self->decoder, "setstate", "(O)", saved_state);
+ Py_DECREF(saved_state);
+ if (res == NULL)
+ return NULL;
+ Py_DECREF(res);
+
+ /* The returned cookie corresponds to the last safe start point. */
+ cookie.chars_to_skip = Py_SAFE_DOWNCAST(chars_to_skip, Py_ssize_t, int);
+ return TextIOWrapper_buildCookie(&cookie);
+
+ fail:
+ Py_XDECREF(posobj);
+ if (saved_state) {
+ PyObject *type, *value, *traceback;
+ PyErr_Fetch(&type, &value, &traceback);
+
+ res = PyObject_CallMethod(self->decoder, "setstate", "(O)", saved_state);
+ Py_DECREF(saved_state);
+ if (res == NULL)
+ return NULL;
+ Py_DECREF(res);
+
+ PyErr_Restore(type, value, traceback);
+ }
+ return NULL;
+}
+
+static PyObject *
+TextIOWrapper_truncate(PyTextIOWrapperObject *self, PyObject *args)
+{
+ PyObject *pos = Py_None;
+ PyObject *res;
+
+ CHECK_INITIALIZED(self)
+ if (!PyArg_ParseTuple(args, "|O:truncate", &pos)) {
+ return NULL;
+ }
+
+ res = PyObject_CallMethodObjArgs((PyObject *) self, _PyIO_str_flush, NULL);
+ if (res == NULL)
+ return NULL;
+ Py_DECREF(res);
+
+ if (pos != Py_None) {
+ res = PyObject_CallMethodObjArgs((PyObject *) self,
+ _PyIO_str_seek, pos, NULL);
+ if (res == NULL)
+ return NULL;
+ Py_DECREF(res);
+ }
+
+ return PyObject_CallMethodObjArgs(self->buffer, _PyIO_str_truncate, NULL);
+}
+
+/* Inquiries */
+
+static PyObject *
+TextIOWrapper_fileno(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_CallMethod(self->buffer, "fileno", NULL);
+}
+
+static PyObject *
+TextIOWrapper_seekable(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_CallMethod(self->buffer, "seekable", NULL);
+}
+
+static PyObject *
+TextIOWrapper_readable(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_CallMethod(self->buffer, "readable", NULL);
+}
+
+static PyObject *
+TextIOWrapper_writable(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_CallMethod(self->buffer, "writable", NULL);
+}
+
+static PyObject *
+TextIOWrapper_isatty(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_CallMethod(self->buffer, "isatty", NULL);
+}
+
+static PyObject *
+TextIOWrapper_flush(PyTextIOWrapperObject *self, PyObject *args)
+{
+ CHECK_INITIALIZED(self);
+ CHECK_CLOSED(self);
+ self->telling = self->seekable;
+ if (_TextIOWrapper_writeflush(self) < 0)
+ return NULL;
+ return PyObject_CallMethod(self->buffer, "flush", NULL);
+}
+
+static PyObject *
+TextIOWrapper_close(PyTextIOWrapperObject *self, PyObject *args)
+{
+ PyObject *res;
+ CHECK_INITIALIZED(self);
+ res = PyObject_CallMethod((PyObject *)self, "flush", NULL);
+ if (res == NULL) {
+ /* If flush() fails, just give up */
+ PyErr_Clear();
+ }
+ else
+ Py_DECREF(res);
+
+ return PyObject_CallMethod(self->buffer, "close", NULL);
+}
+
+static PyObject *
+TextIOWrapper_iternext(PyTextIOWrapperObject *self)
+{
+ PyObject *line;
+
+ CHECK_INITIALIZED(self);
+
+ self->telling = 0;
+ if (Py_TYPE(self) == &PyTextIOWrapper_Type) {
+ /* Skip method call overhead for speed */
+ line = _TextIOWrapper_readline(self, -1);
+ }
+ else {
+ line = PyObject_CallMethodObjArgs((PyObject *)self,
+ _PyIO_str_readline, NULL);
+ if (line && !PyUnicode_Check(line)) {
+ PyErr_Format(PyExc_IOError,
+ "readline() should have returned an str object, "
+ "not '%.200s'", Py_TYPE(line)->tp_name);
+ Py_DECREF(line);
+ return NULL;
+ }
+ }
+
+ if (line == NULL)
+ return NULL;
+
+ if (PyUnicode_GET_SIZE(line) == 0) {
+ /* Reached EOF or would have blocked */
+ Py_DECREF(line);
+ Py_CLEAR(self->snapshot);
+ self->telling = self->seekable;
+ return NULL;
+ }
+
+ return line;
+}
+
+static PyObject *
+TextIOWrapper_name_get(PyTextIOWrapperObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_GetAttrString(self->buffer, "name");
+}
+
+static PyObject *
+TextIOWrapper_closed_get(PyTextIOWrapperObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ return PyObject_GetAttr(self->buffer, _PyIO_str_closed);
+}
+
+static PyObject *
+TextIOWrapper_newlines_get(PyTextIOWrapperObject *self, void *context)
+{
+ PyObject *res;
+ CHECK_INITIALIZED(self);
+ if (self->decoder == NULL)
+ Py_RETURN_NONE;
+ res = PyObject_GetAttr(self->decoder, _PyIO_str_newlines);
+ if (res == NULL) {
+ PyErr_Clear();
+ Py_RETURN_NONE;
+ }
+ return res;
+}
+
+static PyObject *
+TextIOWrapper_chunk_size_get(PyTextIOWrapperObject *self, void *context)
+{
+ CHECK_INITIALIZED(self);
+ return PyLong_FromSsize_t(self->chunk_size);
+}
+
+static int
+TextIOWrapper_chunk_size_set(PyTextIOWrapperObject *self,
+ PyObject *arg, void *context)
+{
+ Py_ssize_t n;
+ CHECK_INITIALIZED_INT(self);
+ n = PyNumber_AsSsize_t(arg, PyExc_TypeError);
+ if (n == -1 && PyErr_Occurred())
+ return -1;
+ if (n <= 0) {
+ PyErr_SetString(PyExc_ValueError,
+ "a strictly positive integer is required");
+ return -1;
+ }
+ self->chunk_size = n;
+ return 0;
+}
+
+static PyMethodDef TextIOWrapper_methods[] = {
+ {"write", (PyCFunction)TextIOWrapper_write, METH_VARARGS},
+ {"read", (PyCFunction)TextIOWrapper_read, METH_VARARGS},
+ {"readline", (PyCFunction)TextIOWrapper_readline, METH_VARARGS},
+ {"flush", (PyCFunction)TextIOWrapper_flush, METH_NOARGS},
+ {"close", (PyCFunction)TextIOWrapper_close, METH_NOARGS},
+
+ {"fileno", (PyCFunction)TextIOWrapper_fileno, METH_NOARGS},
+ {"seekable", (PyCFunction)TextIOWrapper_seekable, METH_NOARGS},
+ {"readable", (PyCFunction)TextIOWrapper_readable, METH_NOARGS},
+ {"writable", (PyCFunction)TextIOWrapper_writable, METH_NOARGS},
+ {"isatty", (PyCFunction)TextIOWrapper_isatty, METH_NOARGS},
+
+ {"seek", (PyCFunction)TextIOWrapper_seek, METH_VARARGS},
+ {"tell", (PyCFunction)TextIOWrapper_tell, METH_NOARGS},
+ {"truncate", (PyCFunction)TextIOWrapper_truncate, METH_VARARGS},
+ {NULL, NULL}
+};
+
+static PyMemberDef TextIOWrapper_members[] = {
+ {"encoding", T_OBJECT, offsetof(PyTextIOWrapperObject, encoding), READONLY},
+ {"buffer", T_OBJECT, offsetof(PyTextIOWrapperObject, buffer), READONLY},
+ {"line_buffering", T_BOOL, offsetof(PyTextIOWrapperObject, line_buffering), READONLY},
+ {NULL}
+};
+
+static PyGetSetDef TextIOWrapper_getset[] = {
+ {"name", (getter)TextIOWrapper_name_get, NULL, NULL},
+ {"closed", (getter)TextIOWrapper_closed_get, NULL, NULL},
+/* {"mode", (getter)TextIOWrapper_mode_get, NULL, NULL},
+*/
+ {"newlines", (getter)TextIOWrapper_newlines_get, NULL, NULL},
+ {"_CHUNK_SIZE", (getter)TextIOWrapper_chunk_size_get,
+ (setter)TextIOWrapper_chunk_size_set, NULL},
+ {0}
+};
+
+PyTypeObject PyTextIOWrapper_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_io.TextIOWrapper", /*tp_name*/
+ sizeof(PyTextIOWrapperObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)TextIOWrapper_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
+ | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ TextIOWrapper_doc, /* tp_doc */
+ (traverseproc)TextIOWrapper_traverse, /* tp_traverse */
+ (inquiry)TextIOWrapper_clear, /* tp_clear */
+ 0, /* tp_richcompare */
+ offsetof(PyTextIOWrapperObject, weakreflist), /*tp_weaklistoffset*/
+ 0, /* tp_iter */
+ (iternextfunc)TextIOWrapper_iternext, /* tp_iternext */
+ TextIOWrapper_methods, /* tp_methods */
+ TextIOWrapper_members, /* tp_members */
+ TextIOWrapper_getset, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ offsetof(PyTextIOWrapperObject, dict), /*tp_dictoffset*/
+ (initproc)TextIOWrapper_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
diff --git a/Modules/io.c b/Modules/io.c
new file mode 100644
index 0000000..58b5798
--- /dev/null
+++ b/Modules/io.c
@@ -0,0 +1,760 @@
+/*
+ An implementation of the new I/O lib as defined by PEP 3116 - "New I/O"
+
+ Classes defined here: UnsupportedOperation, BlockingIOError.
+ Functions defined here: open().
+
+ Mostly written by Amaury Forgeot d'Arc
+*/
+
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+#include "structmember.h"
+#include "_iomodule.h"
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif /* HAVE_SYS_STAT_H */
+
+
+/* Various interned strings */
+
+PyObject *_PyIO_str_close;
+PyObject *_PyIO_str_closed;
+PyObject *_PyIO_str_decode;
+PyObject *_PyIO_str_encode;
+PyObject *_PyIO_str_fileno;
+PyObject *_PyIO_str_flush;
+PyObject *_PyIO_str_getstate;
+PyObject *_PyIO_str_isatty;
+PyObject *_PyIO_str_newlines;
+PyObject *_PyIO_str_nl;
+PyObject *_PyIO_str_read;
+PyObject *_PyIO_str_read1;
+PyObject *_PyIO_str_readable;
+PyObject *_PyIO_str_readinto;
+PyObject *_PyIO_str_readline;
+PyObject *_PyIO_str_reset;
+PyObject *_PyIO_str_seek;
+PyObject *_PyIO_str_seekable;
+PyObject *_PyIO_str_tell;
+PyObject *_PyIO_str_truncate;
+PyObject *_PyIO_str_writable;
+PyObject *_PyIO_str_write;
+
+PyObject *_PyIO_empty_str;
+PyObject *_PyIO_empty_bytes;
+
+
+PyDoc_STRVAR(module_doc,
+"The io module provides the Python interfaces to stream handling. The\n"
+"builtin open function is defined in this module.\n"
+"\n"
+"At the top of the I/O hierarchy is the abstract base class IOBase. It\n"
+"defines the basic interface to a stream. Note, however, that there is no\n"
+"seperation between reading and writing to streams; implementations are\n"
+"allowed to throw an IOError if they do not support a given operation.\n"
+"\n"
+"Extending IOBase is RawIOBase which deals simply with the reading and\n"
+"writing of raw bytes to a stream. FileIO subc lasses RawIOBase to provide\n"
+"an interface to OS files.\n"
+"\n"
+"BufferedIOBase deals with buffering on a raw byte stream (RawIOBase). Its\n"
+"subclasses, BufferedWriter, BufferedReader, and BufferedRWPair buffer\n"
+"streams that are readable, writable, and both respectively.\n"
+"BufferedRandom provides a buffered interface to random access\n"
+"streams. BytesIO is a simple stream of in-memory bytes.\n"
+"\n"
+"Another IOBase subclass, TextIOBase, deals with the encoding and decoding\n"
+"of streams into text. TextIOWrapper, which extends it, is a buffered text\n"
+"interface to a buffered raw stream (`BufferedIOBase`). Finally, StringIO\n"
+"is a in-memory stream for text.\n"
+"\n"
+"Argument names are not part of the specification, and only the arguments\n"
+"of open() are intended to be used as keyword arguments.\n"
+"\n"
+"data:\n"
+"\n"
+"DEFAULT_BUFFER_SIZE\n"
+"\n"
+" An int containing the default buffer size used by the module's buffered\n"
+" I/O classes. open() uses the file's blksize (as obtained by os.stat) if\n"
+" possible.\n"
+ );
+
+
+/*
+ * BlockingIOError extends IOError
+ */
+
+static int
+BlockingIOError_init(PyBlockingIOErrorObject *self, PyObject *args,
+ PyObject *kwds)
+{
+ PyObject *myerrno = NULL, *strerror = NULL;
+ PyObject *baseargs = NULL;
+ Py_ssize_t written = 0;
+
+ assert(PyTuple_Check(args));
+
+ self->written = 0;
+ if (!PyArg_ParseTuple(args, "OO|n:BlockingIOError",
+ &myerrno, &strerror, &written))
+ return -1;
+
+ baseargs = PyTuple_Pack(2, myerrno, strerror);
+ if (baseargs == NULL)
+ return -1;
+ /* This will take care of initializing of myerrno and strerror members */
+ if (((PyTypeObject *)PyExc_IOError)->tp_init(
+ (PyObject *)self, baseargs, kwds) == -1) {
+ Py_DECREF(baseargs);
+ return -1;
+ }
+ Py_DECREF(baseargs);
+
+ self->written = written;
+ return 0;
+}
+
+static PyMemberDef BlockingIOError_members[] = {
+ {"characters_written", T_PYSSIZET, offsetof(PyBlockingIOErrorObject, written), 0},
+ {NULL} /* Sentinel */
+};
+
+static PyTypeObject _PyExc_BlockingIOError = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "BlockingIOError", /*tp_name*/
+ sizeof(PyBlockingIOErrorObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ 0, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare */
+ 0, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+ 0, /*tp_call*/
+ 0, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ PyDoc_STR("Exception raised when I/O would block "
+ "on a non-blocking I/O stream"), /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ 0, /* tp_methods */
+ BlockingIOError_members, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)BlockingIOError_init, /* tp_init */
+ 0, /* tp_alloc */
+ 0, /* tp_new */
+};
+PyObject *PyExc_BlockingIOError = (PyObject *)&_PyExc_BlockingIOError;
+
+
+/*
+ * The main open() function
+ */
+PyDoc_STRVAR(open_doc,
+"Open file and return a stream. Raise IOError upon failure.\n"
+"\n"
+"file is either a text or byte string giving the name (and the path\n"
+"if the file isn't in the current working directory) of the file to\n"
+"be opened or an integer file descriptor of the file to be\n"
+"wrapped. (If a file descriptor is given, it is closed when the\n"
+"returned I/O object is closed, unless closefd is set to False.)\n"
+"\n"
+"mode is an optional string that specifies the mode in which the file\n"
+"is opened. It defaults to 'r' which means open for reading in text\n"
+"mode. Other common values are 'w' for writing (truncating the file if\n"
+"it already exists), and 'a' for appending (which on some Unix systems,\n"
+"means that all writes append to the end of the file regardless of the\n"
+"current seek position). In text mode, if encoding is not specified the\n"
+"encoding used is platform dependent. (For reading and writing raw\n"
+"bytes use binary mode and leave encoding unspecified.) The available\n"
+"modes are:\n"
+"\n"
+"========= ===============================================================\n"
+"Character Meaning\n"
+"--------- ---------------------------------------------------------------\n"
+"'r' open for reading (default)\n"
+"'w' open for writing, truncating the file first\n"
+"'a' open for writing, appending to the end of the file if it exists\n"
+"'b' binary mode\n"
+"'t' text mode (default)\n"
+"'+' open a disk file for updating (reading and writing)\n"
+"'U' universal newline mode (for backwards compatibility; unneeded\n"
+" for new code)\n"
+"========= ===============================================================\n"
+"\n"
+"The default mode is 'rt' (open for reading text). For binary random\n"
+"access, the mode 'w+b' opens and truncates the file to 0 bytes, while\n"
+"'r+b' opens the file without truncation.\n"
+"\n"
+"Python distinguishes between files opened in binary and text modes,\n"
+"even when the underlying operating system doesn't. Files opened in\n"
+"binary mode (appending 'b' to the mode argument) return contents as\n"
+"bytes objects without any decoding. In text mode (the default, or when\n"
+"'t' is appended to the mode argument), the contents of the file are\n"
+"returned as strings, the bytes having been first decoded using a\n"
+"platform-dependent encoding or using the specified encoding if given.\n"
+"\n"
+"buffering is an optional integer used to set the buffering policy. By\n"
+"default full buffering is on. Pass 0 to switch buffering off (only\n"
+"allowed in binary mode), 1 to set line buffering, and an integer > 1\n"
+"for full buffering.\n"
+"\n"
+"encoding is the name of the encoding used to decode or encode the\n"
+"file. This should only be used in text mode. The default encoding is\n"
+"platform dependent, but any encoding supported by Python can be\n"
+"passed. See the codecs module for the list of supported encodings.\n"
+"\n"
+"errors is an optional string that specifies how encoding errors are to\n"
+"be handled---this argument should not be used in binary mode. Pass\n"
+"'strict' to raise a ValueError exception if there is an encoding error\n"
+"(the default of None has the same effect), or pass 'ignore' to ignore\n"
+"errors. (Note that ignoring encoding errors can lead to data loss.)\n"
+"See the documentation for codecs.register for a list of the permitted\n"
+"encoding error strings.\n"
+"\n"
+"newline controls how universal newlines works (it only applies to text\n"
+"mode). It can be None, '', '\\n', '\\r', and '\\r\\n'. It works as\n"
+"follows:\n"
+"\n"
+"* On input, if newline is None, universal newlines mode is\n"
+" enabled. Lines in the input can end in '\\n', '\\r', or '\\r\\n', and\n"
+" these are translated into '\\n' before being returned to the\n"
+" caller. If it is '', universal newline mode is enabled, but line\n"
+" endings are returned to the caller untranslated. If it has any of\n"
+" the other legal values, input lines are only terminated by the given\n"
+" string, and the line ending is returned to the caller untranslated.\n"
+"\n"
+"* On output, if newline is None, any '\\n' characters written are\n"
+" translated to the system default line separator, os.linesep. If\n"
+" newline is '', no translation takes place. If newline is any of the\n"
+" other legal values, any '\\n' characters written are translated to\n"
+" the given string.\n"
+"\n"
+"If closefd is False, the underlying file descriptor will be kept open\n"
+"when the file is closed. This does not work when a file name is given\n"
+"and must be True in that case.\n"
+"\n"
+"open() returns a file object whose type depends on the mode, and\n"
+"through which the standard file operations such as reading and writing\n"
+"are performed. When open() is used to open a file in a text mode ('w',\n"
+"'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open\n"
+"a file in a binary mode, the returned class varies: in read binary\n"
+"mode, it returns a BufferedReader; in write binary and append binary\n"
+"modes, it returns a BufferedWriter, and in read/write mode, it returns\n"
+"a BufferedRandom.\n"
+"\n"
+"It is also possible to use a string or bytearray as a file for both\n"
+"reading and writing. For strings StringIO can be used like a file\n"
+"opened in a text mode, and for bytes a BytesIO can be used like a file\n"
+"opened in a binary mode.\n"
+ );
+
+static PyObject *
+io_open(PyObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"file", "mode", "buffering",
+ "encoding", "errors", "newline",
+ "closefd", NULL};
+ PyObject *file;
+ char *mode = "r";
+ int buffering = -1, closefd = 1;
+ char *encoding = NULL, *errors = NULL, *newline = NULL;
+ unsigned i;
+
+ int reading = 0, writing = 0, appending = 0, updating = 0;
+ int text = 0, binary = 0, universal = 0;
+
+ char rawmode[5], *m;
+ int line_buffering, isatty;
+
+ PyObject *raw, *modeobj = NULL, *buffer = NULL, *wrapper = NULL;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|sizzzi:open", kwlist,
+ &file, &mode, &buffering,
+ &encoding, &errors, &newline,
+ &closefd)) {
+ return NULL;
+ }
+
+ if (!PyUnicode_Check(file) &&
+ !PyBytes_Check(file) &&
+ !PyNumber_Check(file)) {
+ PyErr_Format(PyExc_TypeError, "invalid file: %R", file);
+ return NULL;
+ }
+
+ /* Decode mode */
+ for (i = 0; i < strlen(mode); i++) {
+ char c = mode[i];
+
+ switch (c) {
+ case 'r':
+ reading = 1;
+ break;
+ case 'w':
+ writing = 1;
+ break;
+ case 'a':
+ appending = 1;
+ break;
+ case '+':
+ updating = 1;
+ break;
+ case 't':
+ text = 1;
+ break;
+ case 'b':
+ binary = 1;
+ break;
+ case 'U':
+ universal = 1;
+ reading = 1;
+ break;
+ default:
+ goto invalid_mode;
+ }
+
+ /* c must not be duplicated */
+ if (strchr(mode+i+1, c)) {
+ invalid_mode:
+ PyErr_Format(PyExc_ValueError, "invalid mode: '%s'", mode);
+ return NULL;
+ }
+
+ }
+
+ m = rawmode;
+ if (reading) *(m++) = 'r';
+ if (writing) *(m++) = 'w';
+ if (appending) *(m++) = 'a';
+ if (updating) *(m++) = '+';
+ *m = '\0';
+
+ /* Parameters validation */
+ if (universal) {
+ if (writing || appending) {
+ PyErr_SetString(PyExc_ValueError,
+ "can't use U and writing mode at once");
+ return NULL;
+ }
+ reading = 1;
+ }
+
+ if (text && binary) {
+ PyErr_SetString(PyExc_ValueError,
+ "can't have text and binary mode at once");
+ return NULL;
+ }
+
+ if (reading + writing + appending > 1) {
+ PyErr_SetString(PyExc_ValueError,
+ "must have exactly one of read/write/append mode");
+ return NULL;
+ }
+
+ if (binary && encoding != NULL) {
+ PyErr_SetString(PyExc_ValueError,
+ "binary mode doesn't take an encoding argument");
+ return NULL;
+ }
+
+ if (binary && errors != NULL) {
+ PyErr_SetString(PyExc_ValueError,
+ "binary mode doesn't take an errors argument");
+ return NULL;
+ }
+
+ if (binary && newline != NULL) {
+ PyErr_SetString(PyExc_ValueError,
+ "binary mode doesn't take a newline argument");
+ return NULL;
+ }
+
+ /* Create the Raw file stream */
+ raw = PyObject_CallFunction((PyObject *)&PyFileIO_Type,
+ "Osi", file, rawmode, closefd);
+ if (raw == NULL)
+ return NULL;
+
+ modeobj = PyUnicode_FromString(mode);
+ if (modeobj == NULL)
+ goto error;
+
+ /* buffering */
+ {
+ PyObject *res = PyObject_CallMethod(raw, "isatty", NULL);
+ if (res == NULL)
+ goto error;
+ isatty = PyLong_AsLong(res);
+ Py_DECREF(res);
+ if (isatty == -1 && PyErr_Occurred())
+ goto error;
+ }
+
+ if (buffering == 1 || (buffering < 0 && isatty)) {
+ buffering = -1;
+ line_buffering = 1;
+ }
+ else
+ line_buffering = 0;
+
+ if (buffering < 0) {
+ buffering = DEFAULT_BUFFER_SIZE;
+#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
+ {
+ struct stat st;
+ long fileno;
+ PyObject *res = PyObject_CallMethod(raw, "fileno", NULL);
+ if (res == NULL)
+ goto error;
+
+ fileno = PyLong_AsLong(res);
+ Py_DECREF(res);
+ if (fileno == -1 && PyErr_Occurred())
+ goto error;
+
+ if (fstat(fileno, &st) >= 0)
+ buffering = st.st_blksize;
+ }
+#endif
+ }
+ if (buffering < 0) {
+ PyErr_SetString(PyExc_ValueError,
+ "invalid buffering size");
+ goto error;
+ }
+
+ /* if not buffering, returns the raw file object */
+ if (buffering == 0) {
+ if (!binary) {
+ PyErr_SetString(PyExc_ValueError,
+ "can't have unbuffered text I/O");
+ goto error;
+ }
+
+ Py_DECREF(modeobj);
+ return raw;
+ }
+
+ /* wraps into a buffered file */
+ {
+ PyObject *Buffered_class;
+
+ if (updating)
+ Buffered_class = (PyObject *)&PyBufferedRandom_Type;
+ else if (writing || appending)
+ Buffered_class = (PyObject *)&PyBufferedWriter_Type;
+ else if (reading)
+ Buffered_class = (PyObject *)&PyBufferedReader_Type;
+ else {
+ PyErr_Format(PyExc_ValueError,
+ "unknown mode: '%s'", mode);
+ goto error;
+ }
+
+ buffer = PyObject_CallFunction(Buffered_class, "Oi", raw, buffering);
+ }
+ Py_CLEAR(raw);
+ if (buffer == NULL)
+ goto error;
+
+
+ /* if binary, returns the buffered file */
+ if (binary) {
+ Py_DECREF(modeobj);
+ return buffer;
+ }
+
+ /* wraps into a TextIOWrapper */
+ wrapper = PyObject_CallFunction((PyObject *)&PyTextIOWrapper_Type,
+ "Osssi",
+ buffer,
+ encoding, errors, newline,
+ line_buffering);
+ Py_CLEAR(buffer);
+ if (wrapper == NULL)
+ goto error;
+
+ if (PyObject_SetAttrString(wrapper, "mode", modeobj) < 0)
+ goto error;
+ Py_DECREF(modeobj);
+ return wrapper;
+
+ error:
+ Py_XDECREF(raw);
+ Py_XDECREF(modeobj);
+ Py_XDECREF(buffer);
+ Py_XDECREF(wrapper);
+ return NULL;
+}
+
+/*
+ * Private helpers for the io module.
+ */
+
+Py_off_t
+PyNumber_AsOff_t(PyObject *item, PyObject *err)
+{
+ Py_off_t result;
+ PyObject *runerr;
+ PyObject *value = PyNumber_Index(item);
+ if (value == NULL)
+ return -1;
+
+ /* We're done if PyLong_AsSsize_t() returns without error. */
+ result = PyLong_AsOff_t(value);
+ if (result != -1 || !(runerr = PyErr_Occurred()))
+ goto finish;
+
+ /* Error handling code -- only manage OverflowError differently */
+ if (!PyErr_GivenExceptionMatches(runerr, PyExc_OverflowError))
+ goto finish;
+
+ PyErr_Clear();
+ /* If no error-handling desired then the default clipping
+ is sufficient.
+ */
+ if (!err) {
+ assert(PyLong_Check(value));
+ /* Whether or not it is less than or equal to
+ zero is determined by the sign of ob_size
+ */
+ if (_PyLong_Sign(value) < 0)
+ result = PY_OFF_T_MIN;
+ else
+ result = PY_OFF_T_MAX;
+ }
+ else {
+ /* Otherwise replace the error with caller's error object. */
+ PyErr_Format(err,
+ "cannot fit '%.200s' into an offset-sized integer",
+ item->ob_type->tp_name);
+ }
+
+ finish:
+ Py_DECREF(value);
+ return result;
+}
+
+static int
+iomodule_traverse(PyObject *mod, visitproc visit, void *arg) {
+ _PyIO_State *state = IO_MOD_STATE(mod);
+ if (!state->initialized)
+ return 0;
+ Py_VISIT(state->os_module);
+ if (state->locale_module != NULL) {
+ Py_VISIT(state->locale_module);
+ }
+ Py_VISIT(state->unsupported_operation);
+ return 0;
+}
+
+static int
+iomodule_clear(PyObject *mod) {
+ _PyIO_State *state = IO_MOD_STATE(mod);
+ if (!state->initialized)
+ return 0;
+ Py_CLEAR(state->os_module);
+ if (state->locale_module != NULL)
+ Py_CLEAR(state->locale_module);
+ Py_CLEAR(state->unsupported_operation);
+ return 0;
+}
+
+static void
+iomodule_free(PyObject *mod) {
+ iomodule_clear(mod);
+}
+
+/*
+ * Module definition
+ */
+
+static PyMethodDef module_methods[] = {
+ {"open", (PyCFunction)io_open, METH_VARARGS|METH_KEYWORDS, open_doc},
+ {NULL, NULL}
+};
+
+struct PyModuleDef _PyIO_Module = {
+ PyModuleDef_HEAD_INIT,
+ "io",
+ module_doc,
+ sizeof(_PyIO_State),
+ module_methods,
+ NULL,
+ iomodule_traverse,
+ iomodule_clear,
+ (freefunc)iomodule_free,
+};
+
+PyMODINIT_FUNC
+PyInit__io(void)
+{
+ PyObject *m = PyModule_Create(&_PyIO_Module);
+ _PyIO_State *state = NULL;
+ if (m == NULL)
+ return NULL;
+ state = IO_MOD_STATE(m);
+ state->initialized = 0;
+
+ /* put os in the module state */
+ state->os_module = PyImport_ImportModule("os");
+ if (state->os_module == NULL)
+ goto fail;
+
+#define ADD_TYPE(type, name) \
+ if (PyType_Ready(type) < 0) \
+ goto fail; \
+ Py_INCREF(type); \
+ if (PyModule_AddObject(m, name, (PyObject *)type) < 0) { \
+ Py_DECREF(type); \
+ goto fail; \
+ }
+
+ /* DEFAULT_BUFFER_SIZE */
+ if (PyModule_AddIntMacro(m, DEFAULT_BUFFER_SIZE) < 0)
+ goto fail;
+
+ /* UnsupportedOperation inherits from ValueError and IOError */
+ state->unsupported_operation = PyObject_CallFunction(
+ (PyObject *)&PyType_Type, "s(OO){}",
+ "UnsupportedOperation", PyExc_ValueError, PyExc_IOError);
+ if (state->unsupported_operation == NULL)
+ goto fail;
+ Py_INCREF(state->unsupported_operation);
+ if (PyModule_AddObject(m, "UnsupportedOperation",
+ state->unsupported_operation) < 0)
+ goto fail;
+
+ /* BlockingIOError */
+ _PyExc_BlockingIOError.tp_base = (PyTypeObject *) PyExc_IOError;
+ ADD_TYPE(&_PyExc_BlockingIOError, "BlockingIOError");
+
+ /* Concrete base types of the IO ABCs.
+ (the ABCs themselves are declared through inheritance in io.py)
+ */
+ ADD_TYPE(&PyIOBase_Type, "_IOBase");
+ ADD_TYPE(&PyRawIOBase_Type, "_RawIOBase");
+ ADD_TYPE(&PyBufferedIOBase_Type, "_BufferedIOBase");
+ ADD_TYPE(&PyTextIOBase_Type, "_TextIOBase");
+
+ /* Implementation of concrete IO objects. */
+ /* FileIO */
+ PyFileIO_Type.tp_base = &PyRawIOBase_Type;
+ ADD_TYPE(&PyFileIO_Type, "FileIO");
+
+ /* BytesIO */
+ PyBytesIO_Type.tp_base = &PyBufferedIOBase_Type;
+ ADD_TYPE(&PyBytesIO_Type, "BytesIO");
+
+ /* StringIO */
+ PyStringIO_Type.tp_base = &PyTextIOBase_Type;
+ ADD_TYPE(&PyStringIO_Type, "StringIO");
+
+ /* BufferedReader */
+ PyBufferedReader_Type.tp_base = &PyBufferedIOBase_Type;
+ ADD_TYPE(&PyBufferedReader_Type, "BufferedReader");
+
+ /* BufferedWriter */
+ PyBufferedWriter_Type.tp_base = &PyBufferedIOBase_Type;
+ ADD_TYPE(&PyBufferedWriter_Type, "BufferedWriter");
+
+ /* BufferedRWPair */
+ PyBufferedRWPair_Type.tp_base = &PyBufferedIOBase_Type;
+ ADD_TYPE(&PyBufferedRWPair_Type, "BufferedRWPair");
+
+ /* BufferedRandom */
+ PyBufferedRandom_Type.tp_base = &PyBufferedIOBase_Type;
+ ADD_TYPE(&PyBufferedRandom_Type, "BufferedRandom");
+
+ /* TextIOWrapper */
+ PyTextIOWrapper_Type.tp_base = &PyTextIOBase_Type;
+ ADD_TYPE(&PyTextIOWrapper_Type, "TextIOWrapper");
+
+ /* IncrementalNewlineDecoder */
+ ADD_TYPE(&PyIncrementalNewlineDecoder_Type, "IncrementalNewlineDecoder");
+
+ /* Interned strings */
+ if (!(_PyIO_str_close = PyUnicode_InternFromString("close")))
+ goto fail;
+ if (!(_PyIO_str_closed = PyUnicode_InternFromString("closed")))
+ goto fail;
+ if (!(_PyIO_str_decode = PyUnicode_InternFromString("decode")))
+ goto fail;
+ if (!(_PyIO_str_encode = PyUnicode_InternFromString("encode")))
+ goto fail;
+ if (!(_PyIO_str_fileno = PyUnicode_InternFromString("fileno")))
+ goto fail;
+ if (!(_PyIO_str_flush = PyUnicode_InternFromString("flush")))
+ goto fail;
+ if (!(_PyIO_str_getstate = PyUnicode_InternFromString("getstate")))
+ goto fail;
+ if (!(_PyIO_str_isatty = PyUnicode_InternFromString("isatty")))
+ goto fail;
+ if (!(_PyIO_str_newlines = PyUnicode_InternFromString("newlines")))
+ goto fail;
+ if (!(_PyIO_str_nl = PyUnicode_InternFromString("\n")))
+ goto fail;
+ if (!(_PyIO_str_read = PyUnicode_InternFromString("read")))
+ goto fail;
+ if (!(_PyIO_str_read1 = PyUnicode_InternFromString("read1")))
+ goto fail;
+ if (!(_PyIO_str_readable = PyUnicode_InternFromString("readable")))
+ goto fail;
+ if (!(_PyIO_str_readinto = PyUnicode_InternFromString("readinto")))
+ goto fail;
+ if (!(_PyIO_str_readline = PyUnicode_InternFromString("readline")))
+ goto fail;
+ if (!(_PyIO_str_reset = PyUnicode_InternFromString("reset")))
+ goto fail;
+ if (!(_PyIO_str_seek = PyUnicode_InternFromString("seek")))
+ goto fail;
+ if (!(_PyIO_str_seekable = PyUnicode_InternFromString("seekable")))
+ goto fail;
+ if (!(_PyIO_str_tell = PyUnicode_InternFromString("tell")))
+ goto fail;
+ if (!(_PyIO_str_truncate = PyUnicode_InternFromString("truncate")))
+ goto fail;
+ if (!(_PyIO_str_write = PyUnicode_InternFromString("write")))
+ goto fail;
+ if (!(_PyIO_str_writable = PyUnicode_InternFromString("writable")))
+ goto fail;
+
+ if (!(_PyIO_empty_str = PyUnicode_FromStringAndSize(NULL, 0)))
+ goto fail;
+ if (!(_PyIO_empty_bytes = PyBytes_FromStringAndSize(NULL, 0)))
+ goto fail;
+
+ state->initialized = 1;
+
+ return m;
+
+ fail:
+ Py_XDECREF(state->os_module);
+ Py_XDECREF(state->unsupported_operation);
+ Py_DECREF(m);
+ return NULL;
+}
generated by cgit v0.12 at 2024-12-04 02:59:32 (GMT)