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-rw-r--r--Lib/io.py89
-rw-r--r--Lib/test/test_io.py8
-rw-r--r--Lib/test/test_memoryio.py416
-rw-r--r--Modules/_bytesio.c755
-rw-r--r--Modules/_fileio.c64
-rw-r--r--Objects/bytesobject.c4
-rw-r--r--PC/VS8.0/pythoncore.vcproj4
-rw-r--r--PC/config.c2
-rw-r--r--PCbuild/pythoncore.vcproj4
-rw-r--r--setup.py2
10 files changed, 1284 insertions, 64 deletions
diff --git a/Lib/io.py b/Lib/io.py
index 14178d7..0b6907a 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -494,6 +494,7 @@ class IOBase(object):
files, the newlines argument to open can be used to select the line
terminator(s) recognized.
"""
+ self._checkClosed()
if hasattr(self, "peek"):
def nreadahead():
readahead = self.peek(1)
@@ -508,6 +509,8 @@ class IOBase(object):
return 1
if limit is None:
limit = -1
+ if not isinstance(limit, (int, long)):
+ raise TypeError("limit must be an integer")
res = bytearray()
while limit < 0 or len(res) < limit:
b = self.read(nreadahead())
@@ -536,6 +539,10 @@ class IOBase(object):
lines so far exceeds hint.
"""
if hint is None:
+ hint = -1
+ if not isinstance(hint, (int, long)):
+ raise TypeError("hint must be an integer")
+ if hint <= 0:
return list(self)
n = 0
lines = []
@@ -686,7 +693,7 @@ class BufferedIOBase(IOBase):
import array
if not isinstance(b, array.array):
raise err
- b[:n] = array.array('b', data)
+ b[:n] = array.array(b'b', data)
return n
def write(self, b):
@@ -729,6 +736,8 @@ class _BufferedIOMixin(BufferedIOBase):
if pos is None:
pos = self.tell()
+ # XXX: Should seek() be used, instead of passing the position
+ # XXX directly to truncate?
return self.raw.truncate(pos)
### Flush and close ###
@@ -768,7 +777,7 @@ class _BufferedIOMixin(BufferedIOBase):
return self.raw.isatty()
-class BytesIO(BufferedIOBase):
+class _BytesIO(BufferedIOBase):
"""Buffered I/O implementation using an in-memory bytes buffer."""
@@ -777,20 +786,28 @@ class BytesIO(BufferedIOBase):
def __init__(self, initial_bytes=None):
buf = bytearray()
if initial_bytes is not None:
- buf += initial_bytes
+ buf += bytearray(initial_bytes)
self._buffer = buf
self._pos = 0
def getvalue(self):
"""Return the bytes value (contents) of the buffer
"""
+ if self.closed:
+ raise ValueError("getvalue on closed file")
return bytes(self._buffer)
def read(self, n=None):
+ if self.closed:
+ raise ValueError("read from closed file")
if n is None:
n = -1
+ if not isinstance(n, (int, long)):
+ raise TypeError("argument must be an integer")
if n < 0:
n = len(self._buffer)
+ if len(self._buffer) <= self._pos:
+ return b""
newpos = min(len(self._buffer), self._pos + n)
b = self._buffer[self._pos : newpos]
self._pos = newpos
@@ -807,6 +824,8 @@ class BytesIO(BufferedIOBase):
if isinstance(b, unicode):
raise TypeError("can't write unicode to binary stream")
n = len(b)
+ if n == 0:
+ return 0
newpos = self._pos + n
if newpos > len(self._buffer):
# Inserts null bytes between the current end of the file
@@ -818,28 +837,38 @@ class BytesIO(BufferedIOBase):
return n
def seek(self, pos, whence=0):
+ if self.closed:
+ raise ValueError("seek on closed file")
try:
pos = pos.__index__()
except AttributeError as err:
raise TypeError("an integer is required") # from err
if whence == 0:
- self._pos = max(0, pos)
+ if pos < 0:
+ raise ValueError("negative seek position %r" % (pos,))
+ self._pos = pos
elif whence == 1:
self._pos = max(0, self._pos + pos)
elif whence == 2:
self._pos = max(0, len(self._buffer) + pos)
else:
- raise IOError("invalid whence value")
+ raise ValueError("invalid whence value")
return self._pos
def tell(self):
+ if self.closed:
+ raise ValueError("tell on closed file")
return self._pos
def truncate(self, pos=None):
+ if self.closed:
+ raise ValueError("truncate on closed file")
if pos is None:
pos = self._pos
+ elif pos < 0:
+ raise ValueError("negative truncate position %r" % (pos,))
del self._buffer[pos:]
- return pos
+ return self.seek(pos)
def readable(self):
return True
@@ -850,6 +879,16 @@ class BytesIO(BufferedIOBase):
def seekable(self):
return True
+# Use the faster implementation of BytesIO if available
+try:
+ import _bytesio
+
+ class BytesIO(_bytesio._BytesIO, BufferedIOBase):
+ __doc__ = _bytesio._BytesIO.__doc__
+
+except ImportError:
+ BytesIO = _BytesIO
+
class BufferedReader(_BufferedIOMixin):
@@ -983,6 +1022,12 @@ class BufferedWriter(_BufferedIOMixin):
raise BlockingIOError(e.errno, e.strerror, overage)
return written
+ def truncate(self, pos=None):
+ self.flush()
+ if pos is None:
+ pos = self.raw.tell()
+ return self.raw.truncate(pos)
+
def flush(self):
if self.closed:
raise ValueError("flush of closed file")
@@ -1102,6 +1147,13 @@ class BufferedRandom(BufferedWriter, BufferedReader):
else:
return self.raw.tell() - len(self._read_buf)
+ def truncate(self, pos=None):
+ if pos is None:
+ pos = self.tell()
+ # Use seek to flush the read buffer.
+ self.seek(pos)
+ return BufferedWriter.truncate(self)
+
def read(self, n=None):
if n is None:
n = -1
@@ -1150,11 +1202,7 @@ class TextIOBase(IOBase):
def truncate(self, pos = None):
"""Truncate size to pos."""
- self.flush()
- if pos is None:
- pos = self.tell()
- self.seek(pos)
- return self.buffer.truncate()
+ self._unsupported("truncate")
def readline(self):
"""Read until newline or EOF.
@@ -1351,6 +1399,12 @@ class TextIOWrapper(TextIOBase):
def seekable(self):
return self._seekable
+ def readable(self):
+ return self.buffer.readable()
+
+ def writable(self):
+ return self.buffer.writable()
+
def flush(self):
self.buffer.flush()
self._telling = self._seekable
@@ -1542,7 +1596,16 @@ class TextIOWrapper(TextIOBase):
finally:
decoder.setstate(saved_state)
+ def truncate(self, pos=None):
+ self.flush()
+ if pos is None:
+ pos = self.tell()
+ self.seek(pos)
+ return self.buffer.truncate()
+
def seek(self, cookie, whence=0):
+ if self.closed:
+ raise ValueError("tell on closed file")
if not self._seekable:
raise IOError("underlying stream is not seekable")
if whence == 1: # seek relative to current position
@@ -1629,8 +1692,12 @@ class TextIOWrapper(TextIOBase):
return line
def readline(self, limit=None):
+ if self.closed:
+ raise ValueError("read from closed file")
if limit is None:
limit = -1
+ if not isinstance(limit, (int, long)):
+ raise TypeError("limit must be an integer")
# Grab all the decoded text (we will rewind any extra bits later).
line = self._get_decoded_chars()
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index e193834..b93ce02 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -97,7 +97,7 @@ class IOTest(unittest.TestCase):
self.assertEqual(f.seek(-1, 2), 13)
self.assertEqual(f.tell(), 13)
self.assertEqual(f.truncate(12), 12)
- self.assertEqual(f.tell(), 13)
+ self.assertEqual(f.tell(), 12)
self.assertRaises(TypeError, f.seek, 0.0)
def read_ops(self, f, buffered=False):
@@ -142,7 +142,7 @@ class IOTest(unittest.TestCase):
self.assertEqual(f.tell(), self.LARGE + 2)
self.assertEqual(f.seek(0, 2), self.LARGE + 2)
self.assertEqual(f.truncate(self.LARGE + 1), self.LARGE + 1)
- self.assertEqual(f.tell(), self.LARGE + 2)
+ self.assertEqual(f.tell(), self.LARGE + 1)
self.assertEqual(f.seek(0, 2), self.LARGE + 1)
self.assertEqual(f.seek(-1, 2), self.LARGE)
self.assertEqual(f.read(2), b"x")
@@ -726,6 +726,7 @@ class TextIOWrapperTest(unittest.TestCase):
txt.write("BB\nCCC\n")
txt.write("X\rY\r\nZ")
txt.flush()
+ self.assertEquals(buf.closed, False)
self.assertEquals(buf.getvalue(), expected)
def testNewlines(self):
@@ -806,7 +807,8 @@ class TextIOWrapperTest(unittest.TestCase):
txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
txt.write(data)
txt.close()
- self.assertEquals(buf.getvalue(), expected)
+ self.assertEquals(buf.closed, True)
+ self.assertRaises(ValueError, buf.getvalue)
finally:
os.linesep = save_linesep
diff --git a/Lib/test/test_memoryio.py b/Lib/test/test_memoryio.py
new file mode 100644
index 0000000..0b5ec9f
--- /dev/null
+++ b/Lib/test/test_memoryio.py
@@ -0,0 +1,416 @@
+"""Unit tests for memory-based file-like objects.
+StringIO -- for unicode strings
+BytesIO -- for bytes
+"""
+
+from __future__ import unicode_literals
+
+import unittest
+from test import test_support
+
+import io
+import sys
+import array
+
+try:
+ import _bytesio
+ has_c_implementation = True
+except ImportError:
+ has_c_implementation = False
+
+
+class MemoryTestMixin:
+
+ def write_ops(self, f, t):
+ self.assertEqual(f.write(t("blah.")), 5)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(t("Hello.")), 6)
+ self.assertEqual(f.tell(), 6)
+ self.assertEqual(f.seek(5), 5)
+ self.assertEqual(f.tell(), 5)
+ self.assertEqual(f.write(t(" world\n\n\n")), 9)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(t("h")), 1)
+ self.assertEqual(f.truncate(12), 12)
+ self.assertEqual(f.tell(), 12)
+
+ def test_write(self):
+ buf = self.buftype("hello world\n")
+ memio = self.ioclass(buf)
+
+ self.write_ops(memio, self.buftype)
+ self.assertEqual(memio.getvalue(), buf)
+ memio = self.ioclass()
+ self.write_ops(memio, self.buftype)
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertRaises(TypeError, memio.write, None)
+ memio.close()
+ self.assertRaises(ValueError, memio.write, self.buftype(""))
+
+ def test_writelines(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass()
+
+ self.assertEqual(memio.writelines([buf] * 100), None)
+ self.assertEqual(memio.getvalue(), buf * 100)
+ memio.writelines([])
+ self.assertEqual(memio.getvalue(), buf * 100)
+ memio = self.ioclass()
+ self.assertRaises(TypeError, memio.writelines, [buf] + [1])
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertRaises(TypeError, memio.writelines, None)
+ memio.close()
+ self.assertRaises(ValueError, memio.writelines, [])
+
+ def test_writelines_error(self):
+ memio = self.ioclass()
+ def error_gen():
+ yield self.buftype('spam')
+ raise KeyboardInterrupt
+
+ self.assertRaises(KeyboardInterrupt, memio.writelines, error_gen())
+
+ def test_truncate(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertRaises(ValueError, memio.truncate, -1)
+ memio.seek(6)
+ self.assertEqual(memio.truncate(), 6)
+ self.assertEqual(memio.getvalue(), buf[:6])
+ self.assertEqual(memio.truncate(4), 4)
+ self.assertEqual(memio.getvalue(), buf[:4])
+ self.assertEqual(memio.tell(), 4)
+ memio.write(buf)
+ self.assertEqual(memio.getvalue(), buf[:4] + buf)
+ pos = memio.tell()
+ self.assertEqual(memio.truncate(None), pos)
+ self.assertEqual(memio.tell(), pos)
+ self.assertRaises(TypeError, memio.truncate, '0')
+ memio.close()
+ self.assertRaises(ValueError, memio.truncate, 0)
+
+ def test_init(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+ self.assertEqual(memio.getvalue(), buf)
+ memio = self.ioclass(None)
+ self.assertEqual(memio.getvalue(), self.EOF)
+ memio.__init__(buf * 2)
+ self.assertEqual(memio.getvalue(), buf * 2)
+ memio.__init__(buf)
+ self.assertEqual(memio.getvalue(), buf)
+
+ def test_read(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.read(0), self.EOF)
+ self.assertEqual(memio.read(1), buf[:1])
+ self.assertEqual(memio.read(4), buf[1:5])
+ self.assertEqual(memio.read(900), buf[5:])
+ self.assertEqual(memio.read(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(memio.read(), buf)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.tell(), 10)
+ memio.seek(0)
+ self.assertEqual(memio.read(-1), buf)
+ memio.seek(0)
+ self.assertEqual(type(memio.read()), type(buf))
+ memio.seek(100)
+ self.assertEqual(type(memio.read()), type(buf))
+ memio.seek(0)
+ self.assertEqual(memio.read(None), buf)
+ self.assertRaises(TypeError, memio.read, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.read)
+
+ def test_readline(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 2)
+
+ self.assertEqual(memio.readline(0), self.EOF)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(memio.readline(5), buf[:5])
+ self.assertEqual(memio.readline(5), buf[5:10])
+ self.assertEqual(memio.readline(5), buf[10:15])
+ memio.seek(0)
+ self.assertEqual(memio.readline(-1), buf)
+ memio.seek(0)
+ self.assertEqual(memio.readline(0), self.EOF)
+
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass((buf * 3)[:-1])
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf[:-1])
+ self.assertEqual(memio.readline(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(type(memio.readline()), type(buf))
+ self.assertEqual(memio.readline(None), buf)
+ self.assertRaises(TypeError, memio.readline, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.readline)
+
+ def test_readlines(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 10)
+
+ self.assertEqual(memio.readlines(), [buf] * 10)
+ memio.seek(5)
+ self.assertEqual(memio.readlines(), [buf[5:]] + [buf] * 9)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(15), [buf] * 2)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(-1), [buf] * 10)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(0), [buf] * 10)
+ memio.seek(0)
+ self.assertEqual(type(memio.readlines()[0]), type(buf))
+ memio.seek(0)
+ self.assertEqual(memio.readlines(None), [buf] * 10)
+ self.assertRaises(TypeError, memio.readlines, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.readlines)
+
+ def test_iterator(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 10)
+
+ self.assertEqual(iter(memio), memio)
+ self.failUnless(hasattr(memio, '__iter__'))
+ self.failUnless(hasattr(memio, 'next'))
+ i = 0
+ for line in memio:
+ self.assertEqual(line, buf)
+ i += 1
+ self.assertEqual(i, 10)
+ memio.seek(0)
+ i = 0
+ for line in memio:
+ self.assertEqual(line, buf)
+ i += 1
+ self.assertEqual(i, 10)
+ memio = self.ioclass(buf * 2)
+ memio.close()
+ self.assertRaises(ValueError, memio.next)
+
+ def test_getvalue(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.getvalue(), buf)
+ memio.read()
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertEqual(type(memio.getvalue()), type(buf))
+ memio = self.ioclass(buf * 1000)
+ self.assertEqual(memio.getvalue()[-3:], self.buftype("890"))
+ memio = self.ioclass(buf)
+ memio.close()
+ self.assertRaises(ValueError, memio.getvalue)
+
+ def test_seek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ memio.read(5)
+ self.assertRaises(ValueError, memio.seek, -1)
+ self.assertRaises(ValueError, memio.seek, 1, -1)
+ self.assertRaises(ValueError, memio.seek, 1, 3)
+ self.assertEqual(memio.seek(0), 0)
+ self.assertEqual(memio.seek(0, 0), 0)
+ self.assertEqual(memio.read(), buf)
+ self.assertEqual(memio.seek(3), 3)
+ self.assertEqual(memio.seek(0, 1), 3)
+ self.assertEqual(memio.read(), buf[3:])
+ self.assertEqual(memio.seek(len(buf)), len(buf))
+ self.assertEqual(memio.read(), self.EOF)
+ memio.seek(len(buf) + 1)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.seek(0, 2), len(buf))
+ self.assertEqual(memio.read(), self.EOF)
+ memio.close()
+ self.assertRaises(ValueError, memio.seek, 0)
+
+ def test_overseek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.seek(len(buf) + 1), 11)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.tell(), 11)
+ self.assertEqual(memio.getvalue(), buf)
+ memio.write(self.EOF)
+ self.assertEqual(memio.getvalue(), buf)
+ memio.write(buf)
+ self.assertEqual(memio.getvalue(), buf + self.buftype('\0') + buf)
+
+ def test_tell(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.tell(), 0)
+ memio.seek(5)
+ self.assertEqual(memio.tell(), 5)
+ memio.seek(10000)
+ self.assertEqual(memio.tell(), 10000)
+ memio.close()
+ self.assertRaises(ValueError, memio.tell)
+
+ def test_flush(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.flush(), None)
+
+ def test_flags(self):
+ memio = self.ioclass()
+
+ self.assertEqual(memio.writable(), True)
+ self.assertEqual(memio.readable(), True)
+ self.assertEqual(memio.seekable(), True)
+ self.assertEqual(memio.isatty(), False)
+ self.assertEqual(memio.closed, False)
+ memio.close()
+ self.assertEqual(memio.writable(), True)
+ self.assertEqual(memio.readable(), True)
+ self.assertEqual(memio.seekable(), True)
+ self.assertRaises(ValueError, memio.isatty)
+ self.assertEqual(memio.closed, True)
+
+ def test_subclassing(self):
+ buf = self.buftype("1234567890")
+ def test1():
+ class MemIO(self.ioclass):
+ pass
+ m = MemIO(buf)
+ return m.getvalue()
+ def test2():
+ class MemIO(self.ioclass):
+ def __init__(me, a, b):
+ self.ioclass.__init__(me, a)
+ m = MemIO(buf, None)
+ return m.getvalue()
+ self.assertEqual(test1(), buf)
+ self.assertEqual(test2(), buf)
+
+
+class PyBytesIOTest(MemoryTestMixin, unittest.TestCase):
+ @staticmethod
+ def buftype(s):
+ return s.encode("ascii")
+ ioclass = io._BytesIO
+ EOF = b""
+
+ def test_read1(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertRaises(TypeError, memio.read1)
+ self.assertEqual(memio.read(), buf)
+
+ def test_readinto(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ b = bytearray(b"hello")
+ self.assertEqual(memio.readinto(b), 5)
+ self.assertEqual(b, b"12345")
+ self.assertEqual(memio.readinto(b), 5)
+ self.assertEqual(b, b"67890")
+ self.assertEqual(memio.readinto(b), 0)
+ self.assertEqual(b, b"67890")
+ b = bytearray(b"hello world")
+ memio.seek(0)
+ self.assertEqual(memio.readinto(b), 10)
+ self.assertEqual(b, b"1234567890d")
+ b = bytearray(b"")
+ memio.seek(0)
+ self.assertEqual(memio.readinto(b), 0)
+ self.assertEqual(b, b"")
+ self.assertRaises(TypeError, memio.readinto, '')
+ a = array.array(b'b', map(ord, b"hello world"))
+ memio = self.ioclass(buf)
+ memio.readinto(a)
+ self.assertEqual(a.tostring(), b"1234567890d")
+ memio.close()
+ self.assertRaises(ValueError, memio.readinto, b)
+
+ def test_relative_seek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.seek(-1, 1), 0)
+ self.assertEqual(memio.seek(3, 1), 3)
+ self.assertEqual(memio.seek(-4, 1), 0)
+ self.assertEqual(memio.seek(-1, 2), 9)
+ self.assertEqual(memio.seek(1, 1), 10)
+ self.assertEqual(memio.seek(1, 2), 11)
+ memio.seek(-3, 2)
+ self.assertEqual(memio.read(), buf[-3:])
+ memio.seek(0)
+ memio.seek(1, 1)
+ self.assertEqual(memio.read(), buf[1:])
+
+ def test_unicode(self):
+ memio = self.ioclass()
+
+ self.assertRaises(TypeError, self.ioclass, "1234567890")
+ self.assertRaises(TypeError, memio.write, "1234567890")
+ self.assertRaises(TypeError, memio.writelines, ["1234567890"])
+
+ def test_bytes_array(self):
+ buf = b"1234567890"
+
+ a = array.array(b'b', map(ord, buf))
+ memio = self.ioclass(a)
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertEqual(memio.write(a), 10)
+ self.assertEqual(memio.getvalue(), buf)
+
+
+class PyStringIOTest(MemoryTestMixin, unittest.TestCase):
+ buftype = unicode
+ ioclass = io.StringIO
+ EOF = ""
+
+ def test_relative_seek(self):
+ memio = self.ioclass()
+
+ self.assertRaises(IOError, memio.seek, -1, 1)
+ self.assertRaises(IOError, memio.seek, 3, 1)
+ self.assertRaises(IOError, memio.seek, -3, 1)
+ self.assertRaises(IOError, memio.seek, -1, 2)
+ self.assertRaises(IOError, memio.seek, 1, 1)
+ self.assertRaises(IOError, memio.seek, 1, 2)
+
+ # XXX: For the Python version of io.StringIO, this is highly
+ # dependent on the encoding used for the underlying buffer.
+ # def test_widechar(self):
+ # buf = self.buftype("\U0002030a\U00020347")
+ # memio = self.ioclass(buf)
+ #
+ # self.assertEqual(memio.getvalue(), buf)
+ # self.assertEqual(memio.write(buf), len(buf))
+ # self.assertEqual(memio.tell(), len(buf))
+ # self.assertEqual(memio.getvalue(), buf)
+ # self.assertEqual(memio.write(buf), len(buf))
+ # self.assertEqual(memio.tell(), len(buf) * 2)
+ # self.assertEqual(memio.getvalue(), buf + buf)
+
+if has_c_implementation:
+ class CBytesIOTest(PyBytesIOTest):
+ ioclass = io.BytesIO
+
+def test_main():
+ tests = [PyBytesIOTest, PyStringIOTest]
+ if has_c_implementation:
+ tests.extend([CBytesIOTest])
+ test_support.run_unittest(*tests)
+
+if __name__ == '__main__':
+ test_main()
diff --git a/Modules/_bytesio.c b/Modules/_bytesio.c
new file mode 100644
index 0000000..8c5bb82
--- /dev/null
+++ b/Modules/_bytesio.c
@@ -0,0 +1,755 @@
+#include "Python.h"
+
+typedef struct {
+ PyObject_HEAD
+ char *buf;
+ Py_ssize_t pos;
+ Py_ssize_t string_size;
+ size_t buf_size;
+} BytesIOObject;
+
+#define CHECK_CLOSED(self) \
+ if ((self)->buf == NULL) { \
+ PyErr_SetString(PyExc_ValueError, \
+ "I/O operation on closed file."); \
+ return NULL; \
+ }
+
+/* Internal routine to get a line from the buffer of a BytesIO
+ object. Returns the length between the current position to the
+ next newline character. */
+static Py_ssize_t
+get_line(BytesIOObject *self, char **output)
+{
+ char *n;
+ const char *str_end;
+ Py_ssize_t len;
+
+ assert(self->buf != NULL);
+
+ /* Move to the end of the line, up to the end of the string, s. */
+ str_end = self->buf + self->string_size;
+ for (n = self->buf + self->pos;
+ n < str_end && *n != '\n';
+ n++);
+
+ /* Skip the newline character */
+ if (n < str_end)
+ n++;
+
+ /* Get the length from the current position to the end of the line. */
+ len = n - (self->buf + self->pos);
+ *output = self->buf + self->pos;
+
+ assert(len >= 0);
+ assert(self->pos < PY_SSIZE_T_MAX - len);
+ self->pos += len;
+
+ return len;
+}
+
+/* Internal routine for changing the size of the buffer of BytesIO objects.
+ The caller should ensure that the 'size' argument is non-negative. Returns
+ 0 on success, -1 otherwise. */
+static int
+resize_buffer(BytesIOObject *self, size_t size)
+{
+ /* Here, unsigned types are used to avoid dealing with signed integer
+ overflow, which is undefined in C. */
+ size_t alloc = self->buf_size;
+ char *new_buf = NULL;
+
+ assert(self->buf != NULL);
+
+ /* 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)
+ goto overflow;
+
+ if (size < alloc / 2) {
+ /* Major downsize; resize down to exact size. */
+ alloc = size + 1;
+ }
+ else if (size < alloc) {
+ /* Within allocated size; quick exit */
+ return 0;
+ }
+ else if (size <= alloc * 1.125) {
+ /* Moderate upsize; overallocate similar to list_resize() */
+ alloc = size + (size >> 3) + (size < 9 ? 3 : 6);
+ }
+ else {
+ /* Major upsize; resize up to exact size */
+ alloc = size + 1;
+ }
+
+ if (alloc > ((size_t)-1) / sizeof(char))
+ goto overflow;
+ new_buf = (char *)PyMem_Realloc(self->buf, alloc * sizeof(char));
+ if (new_buf == NULL) {
+ PyErr_NoMemory();
+ return -1;
+ }
+ self->buf_size = alloc;
+ self->buf = new_buf;
+
+ return 0;
+
+ overflow:
+ PyErr_SetString(PyExc_OverflowError,
+ "new buffer size too large");
+ return -1;
+}
+
+/* Internal routine for writing a string of bytes to the buffer of a BytesIO
+ object. Returns the number of bytes wrote, or -1 on error. */
+static Py_ssize_t
+write_bytes(BytesIOObject *self, const char *bytes, Py_ssize_t len)
+{
+ assert(self->buf != NULL);
+ assert(self->pos >= 0);
+ assert(len >= 0);
+
+ if ((size_t)self->pos + len > self->buf_size) {
+ if (resize_buffer(self, (size_t)self->pos + len) < 0)
+ return -1;
+ }
+
+ if (self->pos > self->string_size) {
+ /* In case of overseek, pad with null bytes the buffer region between
+ the end of stream and the current position.
+
+ 0 lo string_size hi
+ | |<---used--->|<----------available----------->|
+ | | <--to pad-->|<---to write---> |
+ 0 buf position
+ */
+ memset(self->buf + self->string_size, '\0',
+ (self->pos - self->string_size) * sizeof(char));
+ }
+
+ /* Copy the data to the internal buffer, overwriting some of the existing
+ data if self->pos < self->string_size. */
+ memcpy(self->buf + self->pos, bytes, len);
+ self->pos += len;
+
+ /* 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;
+}
+
+static PyObject *
+bytesio_get_closed(BytesIOObject *self)
+{
+ if (self->buf == NULL)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+}
+
+/* Generic getter for the writable, readable and seekable properties */
+static PyObject *
+return_true(BytesIOObject *self)
+{
+ Py_RETURN_TRUE;
+}
+
+PyDoc_STRVAR(flush_doc,
+"flush() -> None. Does nothing.");
+
+static PyObject *
+bytesio_flush(BytesIOObject *self)
+{
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(getval_doc,
+"getvalue() -> bytes.\n"
+"\n"
+"Retrieve the entire contents of the BytesIO object.");
+
+static PyObject *
+bytesio_getvalue(BytesIOObject *self)
+{
+ CHECK_CLOSED(self);
+ return PyString_FromStringAndSize(self->buf, self->string_size);
+}
+
+PyDoc_STRVAR(isatty_doc,
+"isatty() -> False.\n"
+"\n"
+"Always returns False since BytesIO objects are not connected\n"
+"to a tty-like device.");
+
+static PyObject *
+bytesio_isatty(BytesIOObject *self)
+{
+ CHECK_CLOSED(self);
+ Py_RETURN_FALSE;
+}
+
+PyDoc_STRVAR(tell_doc,
+"tell() -> current file position, an integer\n");
+
+static PyObject *
+bytesio_tell(BytesIOObject *self)
+{
+ CHECK_CLOSED(self);
+ return PyInt_FromSsize_t(self->pos);
+}
+
+PyDoc_STRVAR(read_doc,
+"read([size]) -> read at most size bytes, returned as a string.\n"
+"\n"
+"If the size argument is negative, read until EOF is reached.\n"
+"Return an empty string at EOF.");
+
+static PyObject *
+bytesio_read(BytesIOObject *self, PyObject *args)
+{
+ Py_ssize_t size, n;
+ char *output;
+ PyObject *arg = Py_None;
+
+ CHECK_CLOSED(self);
+
+ if (!PyArg_ParseTuple(args, "|O:read", &arg))
+ return NULL;
+
+ if (PyInt_Check(arg)) {
+ size = PyInt_AsSsize_t(arg);
+ }
+ else if (arg == Py_None) {
+ /* Read until EOF is reached, by default. */
+ size = -1;
+ }
+ else {
+ PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
+ Py_TYPE(arg)->tp_name);
+ return NULL;
+ }
+
+ /* adjust invalid sizes */
+ n = self->string_size - self->pos;
+ if (size < 0 || size > n) {
+ size = n;
+ if (size < 0)
+ size = 0;
+ }
+
+ assert(self->buf != NULL);
+ output = self->buf + self->pos;
+ self->pos += size;
+
+ return PyString_FromStringAndSize(output, size);
+}
+
+
+PyDoc_STRVAR(read1_doc,
+"read1(size) -> read at most size bytes, returned as a string.\n"
+"\n"
+"If the size argument is negative or omitted, read until EOF is reached.\n"
+"Return an empty string at EOF.");
+
+static PyObject *
+bytesio_read1(BytesIOObject *self, PyObject *n)
+{
+ PyObject *arg, *res;
+
+ arg = PyTuple_Pack(1, n);
+ if (arg == NULL)
+ return NULL;
+ res = bytesio_read(self, arg);
+ Py_DECREF(arg);
+ return res;
+}
+
+PyDoc_STRVAR(readline_doc,
+"readline([size]) -> next line from the file, as a string.\n"
+"\n"
+"Retain newline. A non-negative size argument limits the maximum\n"
+"number of bytes to return (an incomplete line may be returned then).\n"
+"Return an empty string at EOF.\n");
+
+static PyObject *
+bytesio_readline(BytesIOObject *self, PyObject *args)
+{
+ Py_ssize_t size, n;
+ char *output;
+ PyObject *arg = Py_None;
+
+ CHECK_CLOSED(self);
+
+ if (!PyArg_ParseTuple(args, "|O:readline", &arg))
+ return NULL;
+
+ if (PyInt_Check(arg)) {
+ size = PyInt_AsSsize_t(arg);
+ }
+ else if (arg == Py_None) {
+ /* No size limit, by default. */
+ size = -1;
+ }
+ else {
+ PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
+ Py_TYPE(arg)->tp_name);
+ return NULL;
+ }
+
+ n = get_line(self, &output);
+
+ if (size >= 0 && size < n) {
+ size = n - size;
+ n -= size;
+ self->pos -= size;
+ }
+
+ return PyString_FromStringAndSize(output, n);
+}
+
+PyDoc_STRVAR(readlines_doc,
+"readlines([size]) -> list of strings, each a line from the file.\n"
+"\n"
+"Call readline() repeatedly and return a list of the lines so read.\n"
+"The optional size argument, if given, is an approximate bound on the\n"
+"total number of bytes in the lines returned.\n");
+
+static PyObject *
+bytesio_readlines(BytesIOObject *self, PyObject *args)
+{
+ Py_ssize_t maxsize, size, n;
+ PyObject *result, *line;
+ char *output;
+ PyObject *arg = Py_None;
+
+ CHECK_CLOSED(self);
+
+ if (!PyArg_ParseTuple(args, "|O:readlines", &arg))
+ return NULL;
+
+ if (PyInt_Check(arg)) {
+ maxsize = PyInt_AsSsize_t(arg);
+ }
+ else if (arg == Py_None) {
+ /* No size limit, by default. */
+ maxsize = -1;
+ }
+ else {
+ PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
+ Py_TYPE(arg)->tp_name);
+ return NULL;
+ }
+
+ size = 0;
+ result = PyList_New(0);
+ if (!result)
+ return NULL;
+
+ while ((n = get_line(self, &output)) != 0) {
+ line = PyString_FromStringAndSize(output, n);
+ if (!line)
+ goto on_error;
+ if (PyList_Append(result, line) == -1) {
+ Py_DECREF(line);
+ goto on_error;
+ }
+ Py_DECREF(line);
+ size += n;
+ if (maxsize > 0 && size >= maxsize)
+ break;
+ }
+ return result;
+
+ on_error:
+ Py_DECREF(result);
+ return NULL;
+}
+
+PyDoc_STRVAR(readinto_doc,
+"readinto(bytearray) -> int. Read up to len(b) bytes into b.\n"
+"\n"
+"Returns number of bytes read (0 for EOF), or None if the object\n"
+"is set not to block as has no data to read.");
+
+static PyObject *
+bytesio_readinto(BytesIOObject *self, PyObject *buffer)
+{
+ void *raw_buffer;
+ Py_ssize_t len;
+
+ CHECK_CLOSED(self);
+
+ if (PyObject_AsWriteBuffer(buffer, &raw_buffer, &len) == -1)
+ return NULL;
+
+ if (self->pos + len > self->string_size)
+ len = self->string_size - self->pos;
+
+ memcpy(raw_buffer, self->buf + self->pos, len);
+ assert(self->pos + len < PY_SSIZE_T_MAX);
+ assert(len >= 0);
+ self->pos += len;
+
+ return PyInt_FromSsize_t(len);
+}
+
+PyDoc_STRVAR(truncate_doc,
+"truncate([size]) -> int. Truncate the file to at most size bytes.\n"
+"\n"
+"Size defaults to the current file position, as returned by tell().\n"
+"Returns the new size. Imply an absolute seek to the position size.");
+
+static PyObject *
+bytesio_truncate(BytesIOObject *self, PyObject *args)
+{
+ Py_ssize_t size;
+ PyObject *arg = Py_None;
+
+ CHECK_CLOSED(self);
+
+ if (!PyArg_ParseTuple(args, "|O:truncate", &arg))
+ return NULL;
+
+ if (PyInt_Check(arg)) {
+ size = PyInt_AsSsize_t(arg);
+ }
+ else if (arg == Py_None) {
+ /* Truncate to current position if no argument is passed. */
+ size = self->pos;
+ }
+ else {
+ PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
+ Py_TYPE(arg)->tp_name);
+ return NULL;
+ }
+
+ if (size < 0) {
+ PyErr_Format(PyExc_ValueError,
+ "negative size value %zd", size);
+ return NULL;
+ }
+
+ if (size < self->string_size) {
+ self->string_size = size;
+ if (resize_buffer(self, size) < 0)
+ return NULL;
+ }
+ self->pos = size;
+
+ return PyInt_FromSsize_t(size);
+}
+
+static PyObject *
+bytesio_iternext(BytesIOObject *self)
+{
+ char *next;
+ Py_ssize_t n;
+
+ CHECK_CLOSED(self);
+
+ n = get_line(self, &next);
+
+ if (!next || n == 0)
+ return NULL;
+
+ return PyString_FromStringAndSize(next, n);
+}
+
+PyDoc_STRVAR(seek_doc,
+"seek(pos, whence=0) -> int. Change stream position.\n"
+"\n"
+"Seek to byte offset pos relative to position indicated by whence:\n"
+" 0 Start of stream (the default). pos should be >= 0;\n"
+" 1 Current position - pos may be negative;\n"
+" 2 End of stream - pos usually negative.\n"
+"Returns the new absolute position.");
+
+static PyObject *
+bytesio_seek(BytesIOObject *self, PyObject *args)
+{
+ PyObject *pos_obj, *mode_obj;
+ Py_ssize_t pos;
+ int mode = 0;
+
+ CHECK_CLOSED(self);
+
+ /* Special-case for 2.x to prevent floats from passing through.
+ This only needed to make a test in test_io succeed. */
+ if (!PyArg_UnpackTuple(args, "seek", 1, 2, &pos_obj, &mode_obj))
+ return NULL;
+ if (PyFloat_Check(pos_obj)) {
+ PyErr_SetString(PyExc_TypeError,
+ "position argument must be an integer");
+ return NULL;
+ }
+
+ if (!PyArg_ParseTuple(args, "n|i:seek", &pos, &mode))
+ return NULL;
+
+ if (pos < 0 && mode == 0) {
+ PyErr_Format(PyExc_ValueError,
+ "negative seek value %zd", pos);
+ return NULL;
+ }
+
+ /* mode 0: offset relative to beginning of the string.
+ mode 1: offset relative to current position.
+ mode 2: offset relative the end of the string. */
+ if (mode == 1) {
+ if (pos > PY_SSIZE_T_MAX - self->pos) {
+ PyErr_SetString(PyExc_OverflowError,
+ "new position too large");
+ return NULL;
+ }
+ pos += self->pos;
+ }
+ else if (mode == 2) {
+ if (pos > PY_SSIZE_T_MAX - self->string_size) {
+ PyErr_SetString(PyExc_OverflowError,
+ "new position too large");
+ return NULL;
+ }
+ pos += self->string_size;
+ }
+ else if (mode != 0) {
+ PyErr_Format(PyExc_ValueError,
+ "invalid whence (%i, should be 0, 1 or 2)", mode);
+ return NULL;
+ }
+
+ if (pos < 0)
+ pos = 0;
+ self->pos = pos;
+
+ return PyInt_FromSsize_t(self->pos);
+}
+
+PyDoc_STRVAR(write_doc,
+"write(bytes) -> int. Write bytes to file.\n"
+"\n"
+"Return the number of bytes written.");
+
+static PyObject *
+bytesio_write(BytesIOObject *self, PyObject *obj)
+{
+ const char *bytes;
+ Py_ssize_t size;
+ Py_ssize_t n = 0;
+
+ CHECK_CLOSED(self);
+
+ /* Special-case in 2.x to prevent unicode objects to pass through. */
+ if (PyUnicode_Check(obj)) {
+ PyErr_SetString(PyExc_TypeError,
+ "expecting a bytes object, got unicode");
+ return NULL;
+ }
+
+ if (PyObject_AsReadBuffer(obj, (void *)&bytes, &size) < 0)
+ return NULL;
+
+ if (size != 0) {
+ n = write_bytes(self, bytes, size);
+ if (n < 0)
+ return NULL;
+ }
+
+ return PyInt_FromSsize_t(n);
+}
+
+PyDoc_STRVAR(writelines_doc,
+"writelines(sequence_of_strings) -> None. Write strings to the file.\n"
+"\n"
+"Note that newlines are not added. The sequence can be any iterable\n"
+"object producing strings. This is equivalent to calling write() for\n"
+"each string.");
+
+static PyObject *
+bytesio_writelines(BytesIOObject *self, PyObject *v)
+{
+ PyObject *it, *item;
+ PyObject *ret;
+
+ CHECK_CLOSED(self);
+
+ it = PyObject_GetIter(v);
+ if (it == NULL)
+ return NULL;
+
+ while ((item = PyIter_Next(it)) != NULL) {
+ ret = bytesio_write(self, item);
+ Py_DECREF(item);
+ if (ret == NULL) {
+ Py_DECREF(it);
+ return NULL;
+ }
+ Py_DECREF(ret);
+ }
+ Py_DECREF(it);
+
+ /* See if PyIter_Next failed */
+ if (PyErr_Occurred())
+ return NULL;
+
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(close_doc,
+"close() -> None. Disable all I/O operations.");
+
+static PyObject *
+bytesio_close(BytesIOObject *self)
+{
+ if (self->buf != NULL) {
+ PyMem_Free(self->buf);
+ self->buf = NULL;
+ }
+ Py_RETURN_NONE;
+}
+
+static void
+bytesio_dealloc(BytesIOObject *self)
+{
+ if (self->buf != NULL) {
+ PyMem_Free(self->buf);
+ self->buf = NULL;
+ }
+ Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject *
+bytesio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ BytesIOObject *self;
+
+ assert(type != NULL && type->tp_alloc != NULL);
+ self = (BytesIOObject *)type->tp_alloc(type, 0);
+ if (self == NULL)
+ return NULL;
+
+ self->string_size = 0;
+ self->pos = 0;
+ self->buf_size = 0;
+ self->buf = (char *)PyMem_Malloc(0);
+ if (self->buf == NULL) {
+ Py_DECREF(self);
+ return PyErr_NoMemory();
+ }
+
+ return (PyObject *)self;
+}
+
+static int
+bytesio_init(BytesIOObject *self, PyObject *args, PyObject *kwds)
+{
+ PyObject *initvalue = NULL;
+
+ if (!PyArg_ParseTuple(args, "|O:BytesIO", &initvalue))
+ return -1;
+
+ /* In case, __init__ is called multiple times. */
+ self->string_size = 0;
+ self->pos = 0;
+
+ if (initvalue && initvalue != Py_None) {
+ PyObject *res;
+ res = bytesio_write(self, initvalue);
+ if (res == NULL)
+ return -1;
+ Py_DECREF(res);
+ self->pos = 0;
+ }
+
+ return 0;
+}
+
+static PyGetSetDef bytesio_getsetlist[] = {
+ {"closed", (getter)bytesio_get_closed, NULL,
+ "True if the file is closed."},
+ {0}, /* sentinel */
+};
+
+static struct PyMethodDef bytesio_methods[] = {
+ {"readable", (PyCFunction)return_true, METH_NOARGS, NULL},
+ {"seekable", (PyCFunction)return_true, METH_NOARGS, NULL},
+ {"writable", (PyCFunction)return_true, METH_NOARGS, NULL},
+ {"close", (PyCFunction)bytesio_close, METH_NOARGS, close_doc},
+ {"flush", (PyCFunction)bytesio_flush, METH_NOARGS, flush_doc},
+ {"isatty", (PyCFunction)bytesio_isatty, METH_NOARGS, isatty_doc},
+ {"tell", (PyCFunction)bytesio_tell, METH_NOARGS, tell_doc},
+ {"write", (PyCFunction)bytesio_write, METH_O, write_doc},
+ {"writelines", (PyCFunction)bytesio_writelines, METH_O, writelines_doc},
+ {"read1", (PyCFunction)bytesio_read1, METH_O, read1_doc},
+ {"readinto", (PyCFunction)bytesio_readinto, METH_O, readinto_doc},
+ {"readline", (PyCFunction)bytesio_readline, METH_VARARGS, readline_doc},
+ {"readlines", (PyCFunction)bytesio_readlines, METH_VARARGS, readlines_doc},
+ {"read", (PyCFunction)bytesio_read, METH_VARARGS, read_doc},
+ {"getvalue", (PyCFunction)bytesio_getvalue, METH_VARARGS, getval_doc},
+ {"seek", (PyCFunction)bytesio_seek, METH_VARARGS, seek_doc},
+ {"truncate", (PyCFunction)bytesio_truncate, METH_VARARGS, truncate_doc},
+ {NULL, NULL} /* sentinel */
+};
+
+PyDoc_STRVAR(bytesio_doc,
+"BytesIO([buffer]) -> object\n"
+"\n"
+"Create a buffered I/O implementation using an in-memory bytes\n"
+"buffer, ready for reading and writing.");
+
+static PyTypeObject BytesIO_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_bytesio._BytesIO", /*tp_name*/
+ sizeof(BytesIOObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)bytesio_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*/
+ bytesio_doc, /*tp_doc*/
+ 0, /*tp_traverse*/
+ 0, /*tp_clear*/
+ 0, /*tp_richcompare*/
+ 0, /*tp_weaklistoffset*/
+ PyObject_SelfIter, /*tp_iter*/
+ (iternextfunc)bytesio_iternext, /*tp_iternext*/
+ bytesio_methods, /*tp_methods*/
+ 0, /*tp_members*/
+ bytesio_getsetlist, /*tp_getset*/
+ 0, /*tp_base*/
+ 0, /*tp_dict*/
+ 0, /*tp_descr_get*/
+ 0, /*tp_descr_set*/
+ 0, /*tp_dictoffset*/
+ (initproc)bytesio_init, /*tp_init*/
+ 0, /*tp_alloc*/
+ bytesio_new, /*tp_new*/
+};
+
+PyMODINIT_FUNC
+init_bytesio(void)
+{
+ PyObject *m;
+
+ if (PyType_Ready(&BytesIO_Type) < 0)
+ return;
+ m = Py_InitModule("_bytesio", NULL);
+ if (m == NULL)
+ return;
+ Py_INCREF(&BytesIO_Type);
+ PyModule_AddObject(m, "_BytesIO", (PyObject *)&BytesIO_Type);
+}
diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index 00689b3..1cb697b 100644
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -552,11 +552,10 @@ portable_lseek(int fd, PyObject *posobj, int whence)
PyErr_SetString(PyExc_TypeError, "an integer is required");
return NULL;
}
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- pos = PyLong_AsLong(posobj);
+#if defined(HAVE_LARGEFILE_SUPPORT)
+ pos = PyLong_AsLongLong(posobj);
#else
- pos = PyLong_Check(posobj) ?
- PyLong_AsLongLong(posobj) : PyLong_AsLong(posobj);
+ pos = PyLong_AsLong(posobj);
#endif
if (PyErr_Occurred())
return NULL;
@@ -572,10 +571,10 @@ portable_lseek(int fd, PyObject *posobj, int whence)
if (res < 0)
return PyErr_SetFromErrno(PyExc_IOError);
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- return PyLong_FromLong(res);
-#else
+#if defined(HAVE_LARGEFILE_SUPPORT)
return PyLong_FromLongLong(res);
+#else
+ return PyLong_FromLong(res);
#endif
}
@@ -622,48 +621,29 @@ fileio_truncate(PyFileIOObject *self, PyObject *args)
return NULL;
if (posobj == Py_None || posobj == NULL) {
+ /* Get the current position. */
posobj = portable_lseek(fd, NULL, 1);
if (posobj == NULL)
- return NULL;
+ return NULL;
}
else {
- Py_INCREF(posobj);
+ /* Move to the position to be truncated. */
+ posobj = portable_lseek(fd, posobj, 0);
}
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- pos = PyLong_AsLong(posobj);
+#if defined(HAVE_LARGEFILE_SUPPORT)
+ pos = PyLong_AsLongLong(posobj);
#else
- pos = PyLong_Check(posobj) ?
- PyLong_AsLongLong(posobj) : PyLong_AsLong(posobj);
+ pos = PyLong_AsLong(posobj);
#endif
- if (PyErr_Occurred()) {
- Py_DECREF(posobj);
+ if (PyErr_Occurred())
return NULL;
- }
#ifdef MS_WINDOWS
/* MS _chsize doesn't work if newsize doesn't fit in 32 bits,
so don't even try using it. */
{
HANDLE hFile;
- PyObject *pos2, *oldposobj;
-
- /* store the current position */
- oldposobj = portable_lseek(self->fd, NULL, 1);
- if (oldposobj == NULL) {
- Py_DECREF(posobj);
- return NULL;
- }
-
- /* Have to move current pos to desired endpoint on Windows. */
- errno = 0;
- pos2 = portable_lseek(fd, posobj, SEEK_SET);
- if (pos2 == NULL) {
- Py_DECREF(posobj);
- Py_DECREF(oldposobj);
- return NULL;
- }
- Py_DECREF(pos2);
/* Truncate. Note that this may grow the file! */
Py_BEGIN_ALLOW_THREADS
@@ -676,18 +656,6 @@ fileio_truncate(PyFileIOObject *self, PyObject *args)
errno = EACCES;
}
Py_END_ALLOW_THREADS
-
- if (ret == 0) {
- /* Move to the previous position in the file */
- pos2 = portable_lseek(fd, oldposobj, SEEK_SET);
- if (pos2 == NULL) {
- Py_DECREF(posobj);
- Py_DECREF(oldposobj);
- return NULL;
- }
- }
- Py_DECREF(pos2);
- Py_DECREF(oldposobj);
}
#else
Py_BEGIN_ALLOW_THREADS
@@ -697,7 +665,6 @@ fileio_truncate(PyFileIOObject *self, PyObject *args)
#endif /* !MS_WINDOWS */
if (ret != 0) {
- Py_DECREF(posobj);
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}
@@ -791,7 +758,8 @@ PyDoc_STRVAR(seek_doc,
PyDoc_STRVAR(truncate_doc,
"truncate([size: int]) -> None. Truncate the file to at most size bytes.\n"
"\n"
-"Size defaults to the current file position, as returned by tell().");
+"Size defaults to the current file position, as returned by tell()."
+"The current file position is changed to the value of size.");
#endif
PyDoc_STRVAR(tell_doc,
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 542f266..3b52147 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -315,8 +315,8 @@ bytes_iconcat(PyBytesObject *self, PyObject *other)
Py_buffer vo;
if (_getbuffer(other, &vo) < 0) {
- PyErr_Format(PyExc_TypeError, "can't concat bytes to %.100s",
- Py_TYPE(self)->tp_name);
+ PyErr_Format(PyExc_TypeError, "can't concat %.100s to %.100s",
+ Py_TYPE(other)->tp_name, Py_TYPE(self)->tp_name);
return NULL;
}
diff --git a/PC/VS8.0/pythoncore.vcproj b/PC/VS8.0/pythoncore.vcproj
index 45deec7..373a1a0 100644
--- a/PC/VS8.0/pythoncore.vcproj
+++ b/PC/VS8.0/pythoncore.vcproj
@@ -991,6 +991,10 @@
>
</File>
<File
+ RelativePath="..\..\Modules\_bytesio.c"
+ >
+ </File>
+ <File
RelativePath="..\..\Modules\_functoolsmodule.c"
>
</File>
diff --git a/PC/config.c b/PC/config.c
index f128382..a5e1530 100644
--- a/PC/config.c
+++ b/PC/config.c
@@ -53,6 +53,7 @@ extern void init_winreg(void);
extern void init_struct(void);
extern void initdatetime(void);
extern void init_fileio(void);
+extern void init_bytesio(void);
extern void init_functools(void);
extern void init_json(void);
extern void initzlib(void);
@@ -132,6 +133,7 @@ struct _inittab _PyImport_Inittab[] = {
{"_struct", init_struct},
{"datetime", initdatetime},
{"_fileio", init_fileio},
+ {"_bytesio", init_bytesio},
{"_functools", init_functools},
{"_json", init_json},
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index 583a32b..357f71a 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -995,6 +995,10 @@
>
</File>
<File
+ RelativePath="..\Modules\_bytesio.c"
+ >
+ </File>
+ <File
RelativePath="..\Modules\_functoolsmodule.c"
>
</File>
diff --git a/setup.py b/setup.py
index d7fac2f..34035ed 100644
--- a/setup.py
+++ b/setup.py
@@ -436,6 +436,8 @@ class PyBuildExt(build_ext):
exts.append( Extension('operator', ['operator.c']) )
# Python 3.0 _fileio module
exts.append( Extension("_fileio", ["_fileio.c"]) )
+ # Python 3.0 _bytesio module
+ exts.append( Extension("_bytesio", ["_bytesio.c"]) )
# _functools
exts.append( Extension("_functools", ["_functoolsmodule.c"]) )
# _json speedups
generated by cgit v0.12 at 2024-11-24 11:43:38 (GMT)