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# module 'macpath'
import mac
import string
from stat import *
def isabs(s):
return ':' in s and s[0] <> ':'
def cat(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
norm_error = 'path cannot be normalized'
def norm(s):
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 # starts with '::'
del res[len(res)-1]
if not (pre or res):
raise norm_error # starts with 'vol::'
if pre: res = pre + res
if post: res = res + post
s = res[0]
for seg in res[1:]:
s = s + ':' + seg
return s
def isdir(s):
try:
st = mac.stat(s)
except mac.error:
return 0
return S_ISDIR(st[ST_MODE])
def isfile(s):
try:
st = mac.stat(s)
except mac.error:
return 0
return S_ISREG(st[ST_MODE])
def exists(s):
try:
st = mac.stat(s)
except mac.error:
return 0
return 1
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