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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.2)
-
- '''Common operations on DOS pathnames.'''
- import os
- import stat
- __all__ = [
- 'normcase',
- 'isabs',
- 'join',
- 'splitdrive',
- 'split',
- 'splitext',
- 'basename',
- 'dirname',
- 'commonprefix',
- 'getsize',
- 'getmtime',
- 'getatime',
- 'islink',
- 'exists',
- 'isdir',
- 'isfile',
- 'ismount',
- 'walk',
- 'expanduser',
- 'expandvars',
- 'normpath',
- 'abspath']
-
- def normcase(s):
- """Normalize the case of a pathname.
- On MS-DOS it maps the pathname to lowercase, turns slashes into
- backslashes.
- Other normalizations (such as optimizing '../' away) are not allowed
- (this is done by normpath).
- Previously, this version mapped invalid consecutive characters to a
- single '_', but this has been removed. This functionality should
- possibly be added as a new function."""
- return s.replace('/', '\\').lower()
-
-
- def isabs(s):
- '''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 starts with
- a slash or backslash.'''
- s = splitdrive(s)[1]
- if s != '':
- pass
- return s[:1] in '/\\'
-
-
- def join(a, *p):
- '''Join two (or more) paths.'''
- path = a
- for b in p:
- if isabs(b):
- path = b
- elif path == '' or path[-1:] in '/\\:':
- path = path + b
- else:
- path = path + '\\' + b
-
- return path
-
-
- def splitdrive(p):
- '''Split a path into a drive specification (a drive letter followed
- by a colon) and path specification.
- It is always true that drivespec + pathspec == p.'''
- if p[1:2] == ':':
- return (p[0:2], p[2:])
-
- return ('', p)
-
-
- def split(p):
- """Split a path into 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."""
- (d, p) = splitdrive(p)
- i = len(p)
- while i and p[i - 1] not in '/\\':
- i = i - 1
- (head, tail) = (p[:i], p[i:])
- head2 = head
- while head2 and head2[-1] in '/\\':
- head2 = head2[:-1]
- if not head2:
- pass
- head = head
- return (d + head, tail)
-
-
- def splitext(p):
- '''Split a path into root and extension.
- The extension is everything starting at the first dot in the last
- pathname component; the root is everything before that.
- It is always true that root + ext == p.'''
- (root, ext) = ('', '')
- for c in p:
- if c in '/\\':
- (root, ext) = (root + ext + c, '')
- elif c == '.' or ext:
- ext = ext + c
- else:
- root = root + c
-
- return (root, ext)
-
-
- def basename(p):
- '''Return the tail (basename) part of a path.'''
- return split(p)[1]
-
-
- def dirname(p):
- '''Return the head (dirname) part of a path.'''
- return split(p)[0]
-
-
- def commonprefix(m):
- '''Return the longest prefix of all list elements.'''
- if not m:
- return ''
-
- prefix = m[0]
- for item in m:
- for i in range(len(prefix)):
- if prefix[:i + 1] != item[:i + 1]:
- prefix = prefix[:i]
- if i == 0:
- return ''
-
- break
-
-
-
- return prefix
-
-
- def getsize(filename):
- '''Return the size of a file, reported by os.stat().'''
- st = os.stat(filename)
- return st[stat.ST_SIZE]
-
-
- def getmtime(filename):
- '''Return the last modification time of a file, reported by os.stat().'''
- st = os.stat(filename)
- return st[stat.ST_MTIME]
-
-
- def getatime(filename):
- '''Return the last access time of a file, reported by os.stat().'''
- st = os.stat(filename)
- return st[stat.ST_ATIME]
-
-
- def islink(path):
- """Is a path a symbolic link?
- This will always return false on systems where posix.lstat doesn't exist."""
- return 0
-
-
- def exists(path):
- '''Does a path exist?
- This is false for dangling symbolic links.'''
-
- try:
- st = os.stat(path)
- except os.error:
- return 0
-
- return 1
-
-
- def isdir(path):
- '''Is a path a dos directory?'''
-
- try:
- st = os.stat(path)
- except os.error:
- return 0
-
- return stat.S_ISDIR(st[stat.ST_MODE])
-
-
- def isfile(path):
- '''Is a path a regular file?'''
-
- try:
- st = os.stat(path)
- except os.error:
- return 0
-
- return stat.S_ISREG(st[stat.ST_MODE])
-
-
- def ismount(path):
- '''Is a path a mount point?'''
- return isabs(splitdrive(path)[1])
-
-
- 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 None
-
- 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)
-
-
-
-
-
- def expanduser(path):
- """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.)"""
- 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 not os.environ.has_key('HOME'):
- return path
-
- userhome = os.environ['HOME']
- else:
- return path
- return userhome + path[i:]
-
-
- def expandvars(path):
- """Expand paths containing shell variable substitutions.
- The following rules apply:
- - no expansion within single quotes
- - no escape character, except for '$$' which is translated into '$'
- - ${varname} is accepted.
- - varnames can be made out of letters, digits and the character '_'"""
- if '$' 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 == "'":
- 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 == '$':
- if path[index + 1:index + 2] == '$':
- 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 os.environ.has_key(var):
- 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 os.environ.has_key(var):
- res = res + os.environ[var]
-
- if c != '':
- res = res + c
-
- else:
- res = res + c
- index = index + 1
- return res
-
-
- def normpath(path):
- '''Normalize a path, e.g. A//B, A/./B and A/foo/../B all become A/B.
- Also, components of the path are silently truncated to 8+3 notation.'''
- path = path.replace('/', '\\')
- (prefix, path) = splitdrive(path)
- while path[:1] == '\\':
- prefix = prefix + '\\'
- path = path[1:]
- comps = path.split('\\')
- i = 0
- while i < len(comps):
- if comps[i] == '.':
- del comps[i]
- elif comps[i] == '..' and i > 0 and comps[i - 1] not in ('', '..'):
- del comps[i - 1:i + 1]
- i = i - 1
- elif comps[i] == '' and i > 0 and comps[i - 1] != '':
- del comps[i]
- elif '.' in comps[i]:
- comp = comps[i].split('.')
- comps[i] = comp[0][:8] + '.' + comp[1][:3]
- i = i + 1
- elif len(comps[i]) > 8:
- comps[i] = comps[i][:8]
- i = i + 1
- else:
- i = i + 1
- if not prefix and not comps:
- comps.append('.')
-
- return prefix + '\\'.join(comps)
-
-
- def abspath(path):
- '''Return an absolute path.'''
- if not isabs(path):
- path = join(os.getcwd(), path)
-
- return normpath(path)
-
- realpath = abspath
-