Python 0.9.1 as posted in alt.sources

1 files changed, 108 insertions, 0 deletions

diff --git a/lib/macpath.py b/lib/macpath.py
new file mode 100644
index 0000000..99ba6b8
--- /dev/null
+++ b/lib/macpath.py
@@ -0,0 +1,108 @@
+# module 'macpath' -- pathname (or -related) operations for the Macintosh
+
+import mac
+
+from stat import *
+
+
+# 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] <> ':'
+
+
+# Concatenate two pathnames.
+# The result is equivalent to what the second pathname would refer to
+# if the first pathname were the current directory.
+
+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
+
+
+# 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 cat(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