117 lines
2.4 KiB
Python
117 lines
2.4 KiB
Python
# module 'macpath' -- pathname (or -related) operations for the Macintosh
|
|
|
|
import string
|
|
import mac
|
|
from stat import *
|
|
|
|
|
|
# Normalize the case of a pathname. Dummy in Posix, but string.lower here.
|
|
|
|
normcase = string.lower
|
|
|
|
|
|
# Return true if a path is absolute.
|
|
# On the Mac, relative paths begin with a colon,
|
|
# but as a special case, paths with no colons at all are also relative.
|
|
# Anything else is absolute (the string up to the first colon is the
|
|
# volume name).
|
|
|
|
def isabs(s):
|
|
return ':' in s and s[0] <> ':'
|
|
|
|
|
|
# Join two pathnames.
|
|
# The result is equivalent to what the second pathname would refer to
|
|
# if the first pathname were the current directory.
|
|
|
|
def join(s, t):
|
|
if (not s) or isabs(t): return t
|
|
if t[:1] == ':': t = t[1:]
|
|
if ':' not in s:
|
|
s = ':' + s
|
|
if s[-1:] <> ':':
|
|
s = s + ':'
|
|
return s + t
|
|
|
|
|
|
cat = join # For compatibility
|
|
|
|
|
|
# Split a pathname in two parts: the directory leading up to the final bit,
|
|
# and the basename (the filename, without colons, in that directory).
|
|
# The result (s, t) is such that join(s, t) yields the original argument.
|
|
|
|
def split(s):
|
|
if ':' not in s: return '', s
|
|
colon = 0
|
|
for i in range(len(s)):
|
|
if s[i] == ':': colon = i+1
|
|
return s[:colon], s[colon:]
|
|
|
|
|
|
# Normalize a pathname: get rid of '::' sequences by backing up,
|
|
# e.g., 'foo:bar::bletch' becomes 'foo:bletch'.
|
|
# Raise the exception norm_error below if backing up is impossible,
|
|
# e.g., for '::foo'.
|
|
|
|
norm_error = 'macpath.norm_error: path cannot be normalized'
|
|
|
|
def norm(s):
|
|
import string
|
|
if ':' not in s:
|
|
return ':' + s
|
|
f = string.splitfields(s, ':')
|
|
pre = []
|
|
post = []
|
|
if not f[0]:
|
|
pre = f[:1]
|
|
f = f[1:]
|
|
if not f[len(f)-1]:
|
|
post = f[-1:]
|
|
f = f[:-1]
|
|
res = []
|
|
for seg in f:
|
|
if seg:
|
|
res.append(seg)
|
|
else:
|
|
if not res: raise norm_error, 'path starts with ::'
|
|
del res[len(res)-1]
|
|
if not (pre or res):
|
|
raise norm_error, 'path starts with volume::'
|
|
if pre: res = pre + res
|
|
if post: res = res + post
|
|
s = res[0]
|
|
for seg in res[1:]:
|
|
s = s + ':' + seg
|
|
return s
|
|
|
|
|
|
# Return true if the pathname refers to an existing directory.
|
|
|
|
def isdir(s):
|
|
try:
|
|
st = mac.stat(s)
|
|
except mac.error:
|
|
return 0
|
|
return S_ISDIR(st[ST_MODE])
|
|
|
|
|
|
# Return true if the pathname refers to an existing regular file.
|
|
|
|
def isfile(s):
|
|
try:
|
|
st = mac.stat(s)
|
|
except mac.error:
|
|
return 0
|
|
return S_ISREG(st[ST_MODE])
|
|
|
|
|
|
# Return true if the pathname refers to an existing file or directory.
|
|
|
|
def exists(s):
|
|
try:
|
|
st = mac.stat(s)
|
|
except mac.error:
|
|
return 0
|
|
return 1
|