symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/ntpath.py
changeset 1 2fb8b9db1c86
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/ntpath.py	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,497 @@
+# 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 sys
+import stat
+import genericpath
+import warnings
+
+from genericpath import *
+
+__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","relpath"]
+
+# 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.
+    If any component is an absolute path, all previous path components
+    will be discarded."""
+    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):
+    return genericpath._splitext(p, sep, altsep, extsep)
+splitext.__doc__ = genericpath._splitext.__doc__
+
+
+# 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]
+
+# 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 and OS/2 always returns false
+    """
+    return False
+
+# alias exists to lexists
+lexists = exists
+
+# 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."""
+    warnings.warnpy3k("In 3.x, os.path.walk is removed in favor of os.walk.")
+    try:
+        names = os.listdir(top)
+    except os.error:
+        return
+    func(arg, top, names)
+    for name in names:
+        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 'HOME' in os.environ:
+        userhome = os.environ['HOME']
+    elif 'USERPROFILE' in os.environ:
+        userhome = os.environ['USERPROFILE']
+    elif not 'HOMEPATH' in os.environ:
+        return path
+    else:
+        try:
+            drive = os.environ['HOMEDRIVE']
+        except KeyError:
+            drive = ''
+        userhome = join(drive, os.environ['HOMEPATH'])
+
+    if i != 1: #~user
+        userhome = join(dirname(userhome), path[1:i])
+
+    return userhome + path[i:]
+
+
+# Expand paths containing shell variable substitutions.
+# The following rules apply:
+#       - no expansion within single quotes
+#       - '$$' is translated into '$'
+#       - '%%' is translated into '%' if '%%' are not seen in %var1%%var2%
+#       - ${varname} is accepted.
+#       - $varname is accepted.
+#       - %varname% is accepted.
+#       - varnames can be made out of letters, digits and the characters '_-'
+#         (though is not verifed in the ${varname} and %varname% cases)
+# XXX With COMMAND.COM you can use any characters in a variable name,
+# XXX except '^|<>='.
+
+def expandvars(path):
+    """Expand shell variables of the forms $var, ${var} and %var%.
+
+    Unknown variables are left unchanged."""
+    if '$' not in path and '%' not in path:
+        return path
+    import string
+    varchars = string.ascii_letters + string.digits + '_-'
+    res = ''
+    index = 0
+    pathlen = len(path)
+    while index < pathlen:
+        c = path[index]
+        if c == '\'':   # no expansion within single quotes
+            path = path[index + 1:]
+            pathlen = len(path)
+            try:
+                index = path.index('\'')
+                res = res + '\'' + path[:index + 1]
+            except ValueError:
+                res = res + path
+                index = pathlen - 1
+        elif c == '%':  # variable or '%'
+            if path[index + 1:index + 2] == '%':
+                res = res + c
+                index = index + 1
+            else:
+                path = path[index+1:]
+                pathlen = len(path)
+                try:
+                    index = path.index('%')
+                except ValueError:
+                    res = res + '%' + path
+                    index = pathlen - 1
+                else:
+                    var = path[:index]
+                    if var in os.environ:
+                        res = res + os.environ[var]
+                    else:
+                        res = res + '%' + var + '%'
+        elif c == '$':  # variable or '$$'
+            if path[index + 1:index + 2] == '$':
+                res = res + c
+                index = index + 1
+            elif path[index + 1:index + 2] == '{':
+                path = path[index+2:]
+                pathlen = len(path)
+                try:
+                    index = path.index('}')
+                    var = path[:index]
+                    if var in os.environ:
+                        res = res + os.environ[var]
+                    else:
+                        res = res + '${' + var + '}'
+                except ValueError:
+                    res = res + '${' + path
+                    index = pathlen - 1
+            else:
+                var = ''
+                index = index + 1
+                c = path[index:index + 1]
+                while c != '' and c in varchars:
+                    var = var + c
+                    index = index + 1
+                    c = path[index:index + 1]
+                if var in os.environ:
+                    res = res + os.environ[var]
+                else:
+                    res = res + '$' + var
+                if c != '':
+                    index = index - 1
+        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)
+
+def relpath(path, start=curdir):
+    """Return a relative version of a path"""
+
+    if not path:
+        raise ValueError("no path specified")
+    start_list = abspath(start).split(sep)
+    path_list = abspath(path).split(sep)
+    if start_list[0].lower() != path_list[0].lower():
+        unc_path, rest = splitunc(path)
+        unc_start, rest = splitunc(start)
+        if bool(unc_path) ^ bool(unc_start):
+            raise ValueError("Cannot mix UNC and non-UNC paths (%s and %s)"
+                                                                % (path, start))
+        else:
+            raise ValueError("path is on drive %s, start on drive %s"
+                                                % (path_list[0], start_list[0]))
+    # Work out how much of the filepath is shared by start and path.
+    for i in range(min(len(start_list), len(path_list))):
+        if start_list[i].lower() != path_list[i].lower():
+            break
+    else:
+        i += 1
+
+    rel_list = [pardir] * (len(start_list)-i) + path_list[i:]
+    if not rel_list:
+        return curdir
+    return join(*rel_list)