diff -r 000000000000 -r ae805ac0140d python-2.5.2/win32/Lib/ntpath.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/python-2.5.2/win32/Lib/ntpath.py Fri Apr 03 17:19:34 2009 +0100 @@ -0,0 +1,511 @@ +# Module 'ntpath' -- common operations on WinNT/Win95 pathnames +"""Common pathname manipulations, WindowsNT/95 version. + +Instead of importing this module directly, import os and refer to this +module as os.path. +""" + +import os +import stat +import sys + +__all__ = ["normcase","isabs","join","splitdrive","split","splitext", + "basename","dirname","commonprefix","getsize","getmtime", + "getatime","getctime", "islink","exists","lexists","isdir","isfile", + "ismount","walk","expanduser","expandvars","normpath","abspath", + "splitunc","curdir","pardir","sep","pathsep","defpath","altsep", + "extsep","devnull","realpath","supports_unicode_filenames"] + +# strings representing various path-related bits and pieces +curdir = '.' +pardir = '..' +extsep = '.' +sep = '\\' +pathsep = ';' +altsep = '/' +defpath = '.;C:\\bin' +if 'ce' in sys.builtin_module_names: + defpath = '\\Windows' +elif 'os2' in sys.builtin_module_names: + # OS/2 w/ VACPP + altsep = '/' +devnull = 'nul' + +# Normalize the case of a pathname and map slashes to backslashes. +# Other normalizations (such as optimizing '../' away) are not done +# (this is done by normpath). + +def normcase(s): + """Normalize case of pathname. + + Makes all characters lowercase and all slashes into backslashes.""" + return s.replace("/", "\\").lower() + + +# Return whether a path is absolute. +# Trivial in Posix, harder on the Mac or MS-DOS. +# For DOS it is absolute if it starts with a slash or backslash (current +# volume), or if a pathname after the volume letter and colon / UNC resource +# starts with a slash or backslash. + +def isabs(s): + """Test whether a path is absolute""" + s = splitdrive(s)[1] + return s != '' and s[:1] in '/\\' + + +# Join two (or more) paths. + +def join(a, *p): + """Join two or more pathname components, inserting "\\" as needed""" + path = a + for b in p: + b_wins = 0 # set to 1 iff b makes path irrelevant + if path == "": + b_wins = 1 + + elif isabs(b): + # This probably wipes out path so far. However, it's more + # complicated if path begins with a drive letter: + # 1. join('c:', '/a') == 'c:/a' + # 2. join('c:/', '/a') == 'c:/a' + # But + # 3. join('c:/a', '/b') == '/b' + # 4. join('c:', 'd:/') = 'd:/' + # 5. join('c:/', 'd:/') = 'd:/' + if path[1:2] != ":" or b[1:2] == ":": + # Path doesn't start with a drive letter, or cases 4 and 5. + b_wins = 1 + + # Else path has a drive letter, and b doesn't but is absolute. + elif len(path) > 3 or (len(path) == 3 and + path[-1] not in "/\\"): + # case 3 + b_wins = 1 + + if b_wins: + path = b + else: + # Join, and ensure there's a separator. + assert len(path) > 0 + if path[-1] in "/\\": + if b and b[0] in "/\\": + path += b[1:] + else: + path += b + elif path[-1] == ":": + path += b + elif b: + if b[0] in "/\\": + path += b + else: + path += "\\" + b + else: + # path is not empty and does not end with a backslash, + # but b is empty; since, e.g., split('a/') produces + # ('a', ''), it's best if join() adds a backslash in + # this case. + path += '\\' + + return path + + +# 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): + """Split a pathname into drive and path specifiers. Returns a 2-tuple +"(drive,path)"; either part may be empty""" + if p[1:2] == ':': + return p[0:2], p[2:] + return '', p + + +# Parse UNC paths +def splitunc(p): + """Split a pathname into UNC mount point and relative path specifiers. + + Return a 2-tuple (unc, rest); either part may be empty. + If unc is not empty, it has the form '//host/mount' (or similar + using backslashes). unc+rest is always the input path. + Paths containing drive letters never have an UNC part. + """ + if p[1:2] == ':': + return '', p # Drive letter present + firstTwo = p[0:2] + if firstTwo == '//' or firstTwo == '\\\\': + # is a UNC path: + # vvvvvvvvvvvvvvvvvvvv equivalent to drive letter + # \\machine\mountpoint\directories... + # directory ^^^^^^^^^^^^^^^ + normp = normcase(p) + index = normp.find('\\', 2) + if index == -1: + ##raise RuntimeError, 'illegal UNC path: "' + p + '"' + return ("", p) + index = normp.find('\\', index + 1) + if index == -1: + index = len(p) + return p[:index], p[index:] + return '', p + + +# Split a path in head (everything up to the last '/') and tail (the +# rest). After the trailing '/' is stripped, the invariant +# join(head, tail) == p holds. +# The resulting head won't end in '/' unless it is the root. + +def split(p): + """Split a pathname. + + Return tuple (head, tail) where tail is everything after the final slash. + Either part may be empty.""" + + d, p = splitdrive(p) + # set i to index beyond p's last slash + i = len(p) + while i and p[i-1] not in '/\\': + i = i - 1 + head, tail = p[:i], p[i:] # now tail has no slashes + # remove trailing slashes from head, unless it's all slashes + head2 = head + while head2 and head2[-1] in '/\\': + head2 = head2[:-1] + head = head2 or head + return d + head, tail + + +# Split a path in root and extension. +# The extension is everything starting at the last dot in the last +# pathname component; the root is everything before that. +# It is always true that root + ext == p. + +def splitext(p): + """Split the extension from a pathname. + + Extension is everything from the last dot to the end. + Return (root, ext), either part may be empty.""" + + i = p.rfind('.') + if i<=max(p.rfind('/'), p.rfind('\\')): + return p, '' + else: + return p[:i], p[i:] + + +# Return the tail (basename) part of a path. + +def basename(p): + """Returns the final component of a pathname""" + return split(p)[1] + + +# Return the head (dirname) part of a path. + +def dirname(p): + """Returns the directory component of a pathname""" + return split(p)[0] + + +# Return the longest prefix of all list elements. + +def commonprefix(m): + "Given a list of pathnames, returns the longest common leading component" + if not m: return '' + s1 = min(m) + s2 = max(m) + n = min(len(s1), len(s2)) + for i in xrange(n): + if s1[i] != s2[i]: + return s1[:i] + return s1[:n] + + +# Get size, mtime, atime of files. + +def getsize(filename): + """Return the size of a file, reported by os.stat()""" + return os.stat(filename).st_size + +def getmtime(filename): + """Return the last modification time of a file, reported by os.stat()""" + return os.stat(filename).st_mtime + +def getatime(filename): + """Return the last access time of a file, reported by os.stat()""" + return os.stat(filename).st_atime + +def getctime(filename): + """Return the creation time of a file, reported by os.stat().""" + return os.stat(filename).st_ctime + +# Is a path a symbolic link? +# This will always return false on systems where posix.lstat doesn't exist. + +def islink(path): + """Test for symbolic link. On WindowsNT/95 always returns false""" + return False + + +# Does a path exist? + +def exists(path): + """Test whether a path exists""" + try: + st = os.stat(path) + except os.error: + return False + return True + +lexists = exists + + +# Is a path a dos directory? +# This follows symbolic links, so both islink() and isdir() can be true +# for the same path. + +def isdir(path): + """Test whether a path is a directory""" + try: + st = os.stat(path) + except os.error: + return False + return stat.S_ISDIR(st.st_mode) + + +# Is a path a regular file? +# This follows symbolic links, so both islink() and isdir() can be true +# for the same path. + +def isfile(path): + """Test whether a path is a regular file""" + try: + st = os.stat(path) + except os.error: + return False + return stat.S_ISREG(st.st_mode) + + +# Is a path a mount point? Either a root (with or without drive letter) +# or an UNC path with at most a / or \ after the mount point. + +def ismount(path): + """Test whether a path is a mount point (defined as root of drive)""" + unc, rest = splitunc(path) + if unc: + return rest in ("", "/", "\\") + p = splitdrive(path)[1] + return len(p) == 1 and p[0] in '/\\' + + +# Directory tree walk. +# For each directory under top (including top itself, but excluding +# '.' and '..'), func(arg, dirname, filenames) is called, where +# dirname is the name of the directory and filenames is the list +# of files (and subdirectories etc.) in the directory. +# The func may modify the filenames list, to implement a filter, +# or to impose a different order of visiting. + +def walk(top, func, arg): + """Directory tree walk with callback function. + + For each directory in the directory tree rooted at top (including top + itself, but excluding '.' and '..'), call func(arg, dirname, fnames). + dirname is the name of the directory, and fnames a list of the names of + the files and subdirectories in dirname (excluding '.' and '..'). func + may modify the fnames list in-place (e.g. via del or slice assignment), + and walk will only recurse into the subdirectories whose names remain in + fnames; this can be used to implement a filter, or to impose a specific + order of visiting. No semantics are defined for, or required of, arg, + beyond that arg is always passed to func. It can be used, e.g., to pass + a filename pattern, or a mutable object designed to accumulate + statistics. Passing None for arg is common.""" + + try: + names = os.listdir(top) + except os.error: + return + func(arg, top, names) + exceptions = ('.', '..') + for name in names: + if name not in exceptions: + name = join(top, name) + if isdir(name): + walk(name, func, arg) + + +# Expand paths beginning with '~' or '~user'. +# '~' means $HOME; '~user' means that user's home directory. +# If the path doesn't begin with '~', or if the user or $HOME is unknown, +# the path is returned unchanged (leaving error reporting to whatever +# function is called with the expanded path as argument). +# See also module 'glob' for expansion of *, ? and [...] in pathnames. +# (A function should also be defined to do full *sh-style environment +# variable expansion.) + +def expanduser(path): + """Expand ~ and ~user constructs. + + If user or $HOME is unknown, do nothing.""" + if path[:1] != '~': + return path + i, n = 1, len(path) + while i < n and path[i] not in '/\\': + i = i + 1 + if i == 1: + if 'HOME' in os.environ: + userhome = os.environ['HOME'] + elif not 'HOMEPATH' in os.environ: + return path + else: + try: + drive = os.environ['HOMEDRIVE'] + except KeyError: + drive = '' + userhome = join(drive, os.environ['HOMEPATH']) + else: + return path + return userhome + path[i:] + + +# Expand paths containing shell variable substitutions. +# The following rules apply: +# - no expansion within single quotes +# - no escape character, except for '$$' which is translated into '$' +# - ${varname} is accepted. +# - varnames can be made out of letters, digits and the character '_' +# XXX With COMMAND.COM you can use any characters in a variable name, +# XXX except '^|<>='. + +def expandvars(path): + """Expand shell variables of form $var and ${var}. + + Unknown variables are left unchanged.""" + if '$' not in path: + return path + import string + varchars = string.ascii_letters + string.digits + '_-' + res = '' + index = 0 + pathlen = len(path) + while index < pathlen: + c = path[index] + if c == '\'': # no expansion within single quotes + path = path[index + 1:] + pathlen = len(path) + try: + index = path.index('\'') + res = res + '\'' + path[:index + 1] + except ValueError: + res = res + path + index = pathlen - 1 + elif c == '$': # variable or '$$' + if path[index + 1:index + 2] == '$': + res = res + c + index = index + 1 + elif path[index + 1:index + 2] == '{': + path = path[index+2:] + pathlen = len(path) + try: + index = path.index('}') + var = path[:index] + if var in os.environ: + res = res + os.environ[var] + except ValueError: + res = res + path + index = pathlen - 1 + else: + var = '' + index = index + 1 + c = path[index:index + 1] + while c != '' and c in varchars: + var = var + c + index = index + 1 + c = path[index:index + 1] + if var in os.environ: + res = res + os.environ[var] + if c != '': + res = res + c + else: + res = res + c + index = index + 1 + return res + + +# Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A\B. +# Previously, this function also truncated pathnames to 8+3 format, +# but as this module is called "ntpath", that's obviously wrong! + +def normpath(path): + """Normalize path, eliminating double slashes, etc.""" + path = path.replace("/", "\\") + prefix, path = splitdrive(path) + # We need to be careful here. If the prefix is empty, and the path starts + # with a backslash, it could either be an absolute path on the current + # drive (\dir1\dir2\file) or a UNC filename (\\server\mount\dir1\file). It + # is therefore imperative NOT to collapse multiple backslashes blindly in + # that case. + # The code below preserves multiple backslashes when there is no drive + # letter. This means that the invalid filename \\\a\b is preserved + # unchanged, where a\\\b is normalised to a\b. It's not clear that there + # is any better behaviour for such edge cases. + if prefix == '': + # No drive letter - preserve initial backslashes + while path[:1] == "\\": + prefix = prefix + "\\" + path = path[1:] + else: + # We have a drive letter - collapse initial backslashes + if path.startswith("\\"): + prefix = prefix + "\\" + path = path.lstrip("\\") + comps = path.split("\\") + i = 0 + while i < len(comps): + if comps[i] in ('.', ''): + del comps[i] + elif comps[i] == '..': + if i > 0 and comps[i-1] != '..': + del comps[i-1:i+1] + i -= 1 + elif i == 0 and prefix.endswith("\\"): + del comps[i] + else: + i += 1 + else: + i += 1 + # If the path is now empty, substitute '.' + if not prefix and not comps: + comps.append('.') + return prefix + "\\".join(comps) + + +# Return an absolute path. +try: + from nt import _getfullpathname + +except ImportError: # not running on Windows - mock up something sensible + def abspath(path): + """Return the absolute version of a path.""" + if not isabs(path): + path = join(os.getcwd(), path) + return normpath(path) + +else: # use native Windows method on Windows + def abspath(path): + """Return the absolute version of a path.""" + + if path: # Empty path must return current working directory. + try: + path = _getfullpathname(path) + except WindowsError: + pass # Bad path - return unchanged. + else: + path = os.getcwd() + return normpath(path) + +# realpath is a no-op on systems without islink support +realpath = abspath +# Win9x family and earlier have no Unicode filename support. +supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and + sys.getwindowsversion()[3] >= 2)