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In class _Subfile, make sure read(n) can't read beyond EOF. Also 

allow negative numbers to specify read until EOF (like for a regular
file's read() method).
This commit is contained in:
Guido van Rossum 1998-06-17 18:34:40 +00:00
parent 777dcc6b21
commit e50b0a44cb
1 changed files with 5 additions and 2 deletions
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7
Lib/mailbox.py
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@ -46,8 +46,11 @@ class _Subfile:
def read(self, length = None):
if self.pos >= self.stop:
return ''
if length is None:
length = self.stop - self.pos
remaining = self.stop - self.pos
if length is None or length < 0:
length = remaining
elif length > remaining:
length = remaining
self.fp.seek(self.pos)
self.pos = self.pos + length
return self.fp.read(length)