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redefined normcase()

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This commit is contained in:
Guido van Rossum 1995-08-10 19:27:42 +00:00
parent 3b8e1604e8
commit fda5c1a807
1 changed files with 5 additions and 14 deletions
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19
Lib/dospath.py
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@ -7,28 +7,18 @@
# Normalize the case of a pathname.
# On MS-DOS it maps the pathname to lowercase, turns slashes into
# backslashes and maps invalid consecutive characters to a single '_'.
# backslashes.
# Other normalizations (such as optimizing '../' away) are not allowed
# (this is done by normpath).
#
# Amrit: Things that can be valid regular expressions cannot be normalized
# away. (which is pretty much all special characters)
#
# I am assuming that at least these chars may be used:
# [, ], |, *, +, ?
mapchar = '_'
# Previously, this version mapped invalid consecutive characters to a
# single '_', but this has been removed. This functionality should
# possibly be added as a new function.
def normcase(s):
res, s = splitdrive(s)
for c in s:
if c in '/\\':
res = res + os.sep
elif c == '.' and res[-1:] == os.sep:
res = res + mapchar + c
elif ord(c) < 32 or c in ' ",:;<=>':
if res[-1:] != mapchar:
res = res + mapchar
else:
res = res + c
return string.lower(res)
@ -59,6 +49,7 @@ def join(a, b):
# Split a path in a drive specification (a drive letter followed by a
# colon) and the path specification.
# It is always true that drivespec + pathspec == p
def splitdrive(p):
if p[1:2] == ':':
return p[0:2], p[2:]