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Accept Finn Bock's patch #102208 to hardcode EINVAL to 22 when errno

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can't be imported.  This makes StringIO.py work with Jython.

Also, get rid of the string module by converting to string methods.

Shorten some lines by using augmented assignment where appropriate.
This commit is contained in:
Barry Warsaw 2000-12-12 23:12:23 +00:00
parent 132dce2246
commit c7ed0e3c13
1 changed files with 16 additions and 13 deletions
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29
Lib/StringIO.py
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@ -29,8 +29,12 @@
- There's a simple test set (see end of this file).
"""
import errno
import string
try:
from errno import EINVAL
except ImportError:
EINVAL = 22
EMPTYSTRING = ''
class StringIO:
def __init__(self, buf = ''):
@ -52,12 +56,12 @@ def seek(self, pos, mode = 0):
if self.closed:
raise ValueError, "I/O operation on closed file"
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buf += EMPTYSTRING.join(self.buflist)
self.buflist = []
if mode == 1:
pos = pos + self.pos
pos += self.pos
elif mode == 2:
pos = pos + self.len
pos += self.len
self.pos = max(0, pos)
def tell(self):
if self.closed:
@ -67,7 +71,7 @@ def read(self, n = -1):
if self.closed:
raise ValueError, "I/O operation on closed file"
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buf += EMPTYSTRING.join(self.buflist)
self.buflist = []
if n < 0:
newpos = self.len
@ -80,9 +84,9 @@ def readline(self, length=None):
if self.closed:
raise ValueError, "I/O operation on closed file"
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buf += EMPTYSTRING.join(self.buflist)
self.buflist = []
i = string.find(self.buf, '\n', self.pos)
i = self.buf.find('\n', self.pos)
if i < 0:
newpos = self.len
else:
@ -110,8 +114,7 @@ def truncate(self, size=None):
if size is None:
size = self.pos
elif size < 0:
raise IOError(errno.EINVAL,
"Negative size not allowed")
raise IOError(EINVAL, "Negative size not allowed")
elif size < self.pos:
self.pos = size
self.buf = self.getvalue()[:size]
@ -125,7 +128,7 @@ def write(self, s):
newpos = self.pos + len(s)
if self.pos < self.len:
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buf += EMPTYSTRING.join(self.buflist)
self.buflist = []
self.buflist = [self.buf[:self.pos], s, self.buf[newpos:]]
self.buf = ''
@ -136,13 +139,13 @@ def write(self, s):
self.len = newpos
self.pos = newpos
def writelines(self, list):
self.write(string.joinfields(list, ''))
self.write(EMPTYSTRING.join(list))
def flush(self):
if self.closed:
raise ValueError, "I/O operation on closed file"
def getvalue(self):
if self.buflist:
self.buf = self.buf + string.joinfields(self.buflist, '')
self.buf += EMPTYSTRING.join(self.buflist)
self.buflist = []
return self.buf