Added fast alternate io.BytesIO implementation and its test suite.
Removed old test suite for StringIO. Modified truncate() to imply a seek to given argument value.
This commit is contained in:
Alexandre Vassalotti
parent
5d8da20dd1
commit
77250f4df7
75
Lib/io.py
75
Lib/io.py
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@ -490,6 +490,7 @@ class IOBase(metaclass=abc.ABCMeta):
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terminator(s) recognized.
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"""
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# For backwards compatibility, a (slowish) readline().
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self._checkClosed()
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if hasattr(self, "peek"):
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def nreadahead():
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readahead = self.peek(1)
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@ -531,7 +532,7 @@ class IOBase(metaclass=abc.ABCMeta):
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lines will be read if the total size (in bytes/characters) of all
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lines so far exceeds hint.
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"""
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if hint is None:
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if hint is None or hint <= 0:
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return list(self)
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n = 0
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lines = []
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@ -726,6 +727,8 @@ class _BufferedIOMixin(BufferedIOBase):
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if pos is None:
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pos = self.tell()
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# XXX: Should seek() be used, instead of passing the position
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# XXX directly to truncate?
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return self.raw.truncate(pos)
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### Flush and close ###
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@ -765,7 +768,7 @@ class _BufferedIOMixin(BufferedIOBase):
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return self.raw.isatty()
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class BytesIO(BufferedIOBase):
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class _BytesIO(BufferedIOBase):
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"""Buffered I/O implementation using an in-memory bytes buffer."""
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@ -779,13 +782,19 @@ class BytesIO(BufferedIOBase):
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def getvalue(self):
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"""Return the bytes value (contents) of the buffer
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"""
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if self.closed:
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raise ValueError("getvalue on closed file")
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return bytes(self._buffer)
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def read(self, n=None):
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if self.closed:
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raise ValueError("read from closed file")
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if n is None:
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n = -1
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if n < 0:
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n = len(self._buffer)
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if len(self._buffer) <= self._pos:
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return self._buffer[:0]
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newpos = min(len(self._buffer), self._pos + n)
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b = self._buffer[self._pos : newpos]
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self._pos = newpos
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@ -802,6 +811,8 @@ class BytesIO(BufferedIOBase):
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if isinstance(b, str):
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raise TypeError("can't write str to binary stream")
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n = len(b)
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if n == 0:
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return 0
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newpos = self._pos + n
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if newpos > len(self._buffer):
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# Inserts null bytes between the current end of the file
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@ -813,28 +824,38 @@ class BytesIO(BufferedIOBase):
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return n
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def seek(self, pos, whence=0):
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if self.closed:
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raise ValueError("seek on closed file")
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try:
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pos = pos.__index__()
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except AttributeError as err:
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raise TypeError("an integer is required") from err
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if whence == 0:
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self._pos = max(0, pos)
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if pos < 0:
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raise ValueError("negative seek position %r" % (pos,))
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elif whence == 1:
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self._pos = max(0, self._pos + pos)
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elif whence == 2:
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self._pos = max(0, len(self._buffer) + pos)
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else:
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raise IOError("invalid whence value")
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raise ValueError("invalid whence value")
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return self._pos
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def tell(self):
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if self.closed:
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raise ValueError("tell on closed file")
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return self._pos
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def truncate(self, pos=None):
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if self.closed:
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raise ValueError("truncate on closed file")
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if pos is None:
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pos = self._pos
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elif pos < 0:
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raise ValueError("negative truncate position %r" % (pos,))
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del self._buffer[pos:]
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return pos
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return self.seek(pos)
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def readable(self):
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return True
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@ -845,6 +866,16 @@ class BytesIO(BufferedIOBase):
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def seekable(self):
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return True
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# Use the faster implementation of BytesIO if available
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try:
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import _bytesio
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class BytesIO(_bytesio._BytesIO, BufferedIOBase):
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__doc__ = _bytesio._BytesIO.__doc__
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except ImportError:
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BytesIO = _BytesIO
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class BufferedReader(_BufferedIOMixin):
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@ -978,6 +1009,12 @@ class BufferedWriter(_BufferedIOMixin):
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raise BlockingIOError(e.errno, e.strerror, overage)
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return written
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def truncate(self, pos=None):
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self.flush()
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if pos is None:
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pos = self.raw.tell()
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return self.raw.truncate(pos)
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def flush(self):
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if self.closed:
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raise ValueError("flush of closed file")
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@ -1097,6 +1134,13 @@ class BufferedRandom(BufferedWriter, BufferedReader):
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else:
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return self.raw.tell() - len(self._read_buf)
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def truncate(self, pos=None):
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if pos is None:
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pos = self.tell()
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# Use seek to flush the read buffer.
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self.seek(pos)
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return BufferedWriter.truncate(self)
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def read(self, n=None):
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if n is None:
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n = -1
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@ -1145,11 +1189,7 @@ class TextIOBase(IOBase):
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def truncate(self, pos: int = None) -> int:
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"""Truncate size to pos."""
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self.flush()
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if pos is None:
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pos = self.tell()
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self.seek(pos)
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return self.buffer.truncate()
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self._unsupported("truncate")
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def readline(self) -> str:
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"""Read until newline or EOF.
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@ -1346,6 +1386,12 @@ class TextIOWrapper(TextIOBase):
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def seekable(self):
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return self._seekable
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def readable(self):
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return self.buffer.readable()
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def writable(self):
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return self.buffer.writable()
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def flush(self):
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self.buffer.flush()
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self._telling = self._seekable
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@ -1539,7 +1585,16 @@ class TextIOWrapper(TextIOBase):
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finally:
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decoder.setstate(saved_state)
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def truncate(self, pos=None):
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self.flush()
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if pos is None:
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pos = self.tell()
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self.seek(pos)
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return self.buffer.truncate()
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def seek(self, cookie, whence=0):
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if self.closed:
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raise ValueError("tell on closed file")
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if not self._seekable:
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raise IOError("underlying stream is not seekable")
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if whence == 1: # seek relative to current position
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@ -1626,6 +1681,8 @@ class TextIOWrapper(TextIOBase):
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return line
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def readline(self, limit=None):
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if self.closed:
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raise ValueError("read from closed file")
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if limit is None:
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limit = -1
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@ -1,127 +0,0 @@
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# Tests StringIO and cStringIO
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import sys
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import unittest
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import io
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from test import test_support
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class TestGenericStringIO:
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# use a class variable CLASS to define which class is being tested
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CLASS = None
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# Line of data to test as string
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_line = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!'
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# Constructor to use for the test data (._line is passed to this
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# constructor)
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constructor = str
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def setUp(self):
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self._line = self.constructor(self._line)
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self._lines = self.constructor((self._line + '\n') * 5)
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self._fp = self.CLASS(self._lines)
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def test_reads(self):
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eq = self.assertEqual
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self.assertRaises(TypeError, self._fp.seek)
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eq(self._fp.read(10), self._line[:10])
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eq(self._fp.readline(), self._line[10:] + '\n')
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eq(len(self._fp.readlines(60)), 2)
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def test_writes(self):
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f = self.CLASS()
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self.assertRaises(TypeError, f.seek)
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f.write(self._line[:6])
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f.seek(3)
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f.write(self._line[20:26])
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f.write(self._line[52])
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self.assertEqual(f.getvalue(), 'abcuvwxyz!')
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def test_writelines(self):
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f = self.CLASS()
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f.writelines([self._line[0], self._line[1], self._line[2]])
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f.seek(0)
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self.assertEqual(f.getvalue(), 'abc')
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def test_writelines_error(self):
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def errorGen():
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yield 'a'
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raise KeyboardInterrupt()
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f = self.CLASS()
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self.assertRaises(KeyboardInterrupt, f.writelines, errorGen())
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def test_truncate(self):
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eq = self.assertEqual
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f = self.CLASS()
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f.write(self._lines)
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f.seek(10)
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f.truncate()
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eq(f.getvalue(), 'abcdefghij')
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f.truncate(5)
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eq(f.getvalue(), 'abcde')
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f.write('xyz')
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eq(f.getvalue(), 'abcdexyz')
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self.assertRaises(ValueError, f.truncate, -1)
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f.close()
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self.assertRaises(ValueError, f.write, 'frobnitz')
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def test_closed_flag(self):
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f = self.CLASS()
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self.assertEqual(f.closed, False)
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f.close()
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self.assertEqual(f.closed, True)
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f = self.CLASS(self.constructor("abc"))
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self.assertEqual(f.closed, False)
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f.close()
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self.assertEqual(f.closed, True)
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def test_isatty(self):
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f = self.CLASS()
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self.assertRaises(TypeError, f.isatty, None)
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self.assertEqual(f.isatty(), False)
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f.close()
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self.assertRaises(ValueError, f.isatty)
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def test_iterator(self):
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eq = self.assertEqual
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unless = self.failUnless
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eq(iter(self._fp), self._fp)
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# Does this object support the iteration protocol?
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unless(hasattr(self._fp, '__iter__'))
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unless(hasattr(self._fp, '__next__'))
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i = 0
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for line in self._fp:
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eq(line, self._line + '\n')
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i += 1
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eq(i, 5)
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self._fp.close()
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self.assertRaises(StopIteration, next, self._fp)
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class TestioStringIO(TestGenericStringIO, unittest.TestCase):
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CLASS = io.StringIO
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def test_unicode(self):
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if not test_support.have_unicode: return
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# The StringIO module also supports concatenating Unicode
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# snippets to larger Unicode strings. This is tested by this
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# method. Note that cStringIO does not support this extension.
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f = self.CLASS()
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f.write(self._line[:6])
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f.seek(3)
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f.write(str(self._line[20:26]))
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f.write(str(self._line[52]))
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s = f.getvalue()
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self.assertEqual(s, str('abcuvwxyz!'))
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self.assertEqual(type(s), str)
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def test_main():
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test_support.run_unittest(TestioStringIO)
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if __name__ == '__main__':
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test_main()
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@ -98,7 +98,7 @@ class IOTest(unittest.TestCase):
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self.assertEqual(f.seek(-1, 2), 13)
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self.assertEqual(f.tell(), 13)
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self.assertEqual(f.truncate(12), 12)
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self.assertEqual(f.tell(), 13)
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self.assertEqual(f.tell(), 12)
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self.assertRaises(TypeError, f.seek, 0.0)
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def read_ops(self, f, buffered=False):
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@ -143,7 +143,7 @@ class IOTest(unittest.TestCase):
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self.assertEqual(f.tell(), self.LARGE + 2)
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self.assertEqual(f.seek(0, 2), self.LARGE + 2)
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self.assertEqual(f.truncate(self.LARGE + 1), self.LARGE + 1)
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self.assertEqual(f.tell(), self.LARGE + 2)
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self.assertEqual(f.tell(), self.LARGE + 1)
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self.assertEqual(f.seek(0, 2), self.LARGE + 1)
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self.assertEqual(f.seek(-1, 2), self.LARGE)
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self.assertEqual(f.read(2), b"x")
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@ -727,6 +727,7 @@ class TextIOWrapperTest(unittest.TestCase):
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txt.write("BB\nCCC\n")
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txt.write("X\rY\r\nZ")
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txt.flush()
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self.assertEquals(buf.closed, False)
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self.assertEquals(buf.getvalue(), expected)
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def testNewlines(self):
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@ -807,7 +808,8 @@ class TextIOWrapperTest(unittest.TestCase):
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txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
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txt.write(data)
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txt.close()
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self.assertEquals(buf.getvalue(), expected)
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self.assertEquals(buf.closed, True)
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self.assertRaises(ValueError, buf.getvalue)
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finally:
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os.linesep = save_linesep
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@ -120,14 +120,15 @@ class TestCase(unittest.TestCase):
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newsize -= 1
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f.seek(42)
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f.truncate(newsize)
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self.assertEqual(f.tell(), 42) # else pointer moved
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f.seek(0, 2)
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self.assertEqual(f.tell(), newsize) # else wasn't truncated
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f.seek(0, 2)
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self.assertEqual(f.tell(), newsize)
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# XXX truncate(larger than true size) is ill-defined
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# across platform; cut it waaaaay back
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f.seek(0)
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f.truncate(1)
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self.assertEqual(f.tell(), 0) # else pointer moved
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self.assertEqual(f.tell(), 1) # else pointer moved
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f.seek(0)
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self.assertEqual(len(f.read()), 1) # else wasn't truncated
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def test_main():
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@ -0,0 +1,405 @@
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"""Unit tests for memory-based file-like objects.
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StringIO -- for unicode strings
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BytesIO -- for bytes
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"""
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import unittest
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from test import test_support
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import io
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try:
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import _bytesio
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has_c_implementation = True
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except ImportError:
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has_c_implementation = False
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class MemoryTestMixin:
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def write_ops(self, f, t):
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self.assertEqual(f.write(t("blah.")), 5)
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self.assertEqual(f.seek(0), 0)
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self.assertEqual(f.write(t("Hello.")), 6)
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self.assertEqual(f.tell(), 6)
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self.assertEqual(f.seek(5), 5)
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self.assertEqual(f.tell(), 5)
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self.assertEqual(f.write(t(" world\n\n\n")), 9)
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self.assertEqual(f.seek(0), 0)
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self.assertEqual(f.write(t("h")), 1)
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self.assertEqual(f.truncate(12), 12)
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self.assertEqual(f.tell(), 12)
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def test_write(self):
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buf = self.buftype("hello world\n")
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memio = self.ioclass(buf)
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self.write_ops(memio, self.buftype)
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self.assertEqual(memio.getvalue(), buf)
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memio = self.ioclass()
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self.write_ops(memio, self.buftype)
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self.assertEqual(memio.getvalue(), buf)
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self.assertRaises(TypeError, memio.write, None)
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memio.close()
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self.assertRaises(ValueError, memio.write, self.buftype(""))
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def test_writelines(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass()
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self.assertEqual(memio.writelines([buf] * 100), None)
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self.assertEqual(memio.getvalue(), buf * 100)
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memio.writelines([])
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self.assertEqual(memio.getvalue(), buf * 100)
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memio = self.ioclass()
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self.assertRaises(TypeError, memio.writelines, [buf] + [1])
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self.assertEqual(memio.getvalue(), buf)
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self.assertRaises(TypeError, memio.writelines, None)
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memio.close()
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self.assertRaises(ValueError, memio.writelines, [])
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def test_writelines_error(self):
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memio = self.ioclass()
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def error_gen():
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yield self.buftype('spam')
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raise KeyboardInterrupt
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self.assertRaises(KeyboardInterrupt, memio.writelines, error_gen())
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def test_truncate(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertRaises(ValueError, memio.truncate, -1)
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memio.seek(6)
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self.assertEqual(memio.truncate(), 6)
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self.assertEqual(memio.getvalue(), buf[:6])
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self.assertEqual(memio.truncate(4), 4)
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self.assertEqual(memio.getvalue(), buf[:4])
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self.assertEqual(memio.tell(), 4)
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memio.write(buf)
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self.assertEqual(memio.getvalue(), buf[:4] + buf)
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pos = memio.tell()
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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(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(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(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)
|
||||
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, '')
|
||||
import array
|
||||
a = array.array('b', 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"
|
||||
import array
|
||||
a = array.array('b', list(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 = str
|
||||
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()
|
||||
|
|
@ -58,7 +58,7 @@ class MimeToolsTest(unittest.TestCase):
|
|||
s.add(nb)
|
||||
|
||||
def test_message(self):
|
||||
msg = mimetools.Message(io.StringIO(msgtext1))
|
||||
msg = mimetools.Message(io.StringIO(str(msgtext1)))
|
||||
self.assertEqual(msg.gettype(), "text/plain")
|
||||
self.assertEqual(msg.getmaintype(), "text")
|
||||
self.assertEqual(msg.getsubtype(), "plain")
|
||||
|
|
|
|||
|
|
@ -0,0 +1,744 @@
|
|||
#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);
|
||||
|
||||
/* This overflow check is not strictly necessary. However, it avoids us to
|
||||
deal with funky things like comparing an unsigned and a signed
|
||||
integer. */
|
||||
if (self->pos > PY_SSIZE_T_MAX - len) {
|
||||
PyErr_SetString(PyExc_OverflowError,
|
||||
"new position too large");
|
||||
return -1;
|
||||
}
|
||||
if (self->pos + len > self->buf_size) {
|
||||
if (resize_buffer(self, 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() -> string.\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 PyLong_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 (PyLong_Check(arg)) {
|
||||
size = PyLong_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 (PyLong_Check(arg)) {
|
||||
size = PyLong_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 (PyLong_Check(arg)) {
|
||||
maxsize = PyLong_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(bytes) -> 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 PyLong_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 (PyLong_Check(arg)) {
|
||||
size = PyLong_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 PyLong_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)
|
||||
{
|
||||
Py_ssize_t pos;
|
||||
int mode = 0;
|
||||
|
||||
CHECK_CLOSED(self);
|
||||
|
||||
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 PyLong_FromSsize_t(self->pos);
|
||||
}
|
||||
|
||||
PyDoc_STRVAR(write_doc,
|
||||
"write(str) -> int. Write string str 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);
|
||||
|
||||
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 PyLong_FromSsize_t(n);
|
||||
}
|
||||
|
||||
PyDoc_STRVAR(writelines_doc,
|
||||
"writelines(sequence_of_strings) -> None. Write the strings to the file.\n"
|
||||
"\n"
|
||||
"Note that newlines are not added. The sequence can be any iterable object\n"
|
||||
"producing strings. This is equivalent to calling write() for 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);
|
||||
}
|
||||
|
|
@ -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;
|
||||
}
|
||||
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,
|
||||
|
|
|
|||
|
|
@ -240,11 +240,11 @@ Py_InitializeEx(int install_sigs)
|
|||
}
|
||||
|
||||
initmain(); /* Module __main__ */
|
||||
if (!Py_NoSiteFlag)
|
||||
initsite(); /* Module site */
|
||||
if (initstdio() < 0)
|
||||
Py_FatalError(
|
||||
"Py_Initialize: can't initialize sys standard streams");
|
||||
if (!Py_NoSiteFlag)
|
||||
initsite(); /* Module site */
|
||||
|
||||
/* auto-thread-state API, if available */
|
||||
#ifdef WITH_THREAD
|
||||
|
|
|
|||
2
setup.py
2
setup.py
|
|
@ -426,6 +426,8 @@ class PyBuildExt(build_ext):
|
|||
exts.append( Extension('operator', ['operator.c']) )
|
||||
# _functools
|
||||
exts.append( Extension("_functools", ["_functoolsmodule.c"]) )
|
||||
# Memory-based IO accelerator modules
|
||||
exts.append( Extension("_bytesio", ["_bytesio.c"]) )
|
||||
# atexit
|
||||
exts.append( Extension("atexit", ["atexitmodule.c"]) )
|
||||
# Python C API test module
|
||||
|
|
|
|||
Loading…
Reference in New Issue