# cpython-withatomic / Lib / macpath.py

The branch '2.0' does not exist.
 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223``` ```"""Pathname and path-related operations for the Macintosh.""" import os from stat import * # Normalize the case of a pathname. Dummy in Posix, but .lower() here. def normcase(path): return path.lower() def isabs(s): """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).""" return ':' in s and s[0] <> ':' def join(s, *p): path = s for t in p: if (not s) or isabs(t): path = t continue if t[:1] == ':': t = t[1:] if ':' not in path: path = ':' + path if path[-1:] <> ':': path = path + ':' path = path + t return path def split(s): """Split a pathname into 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 join(s, t) yields the original argument.""" if ':' not in s: return '', s colon = 0 for i in range(len(s)): if s[i] == ':': colon = i + 1 path, file = s[:colon-1], s[colon:] if path and not ':' in path: path = path + ':' return path, file def splitext(p): """Split a path into 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.""" root, ext = '', '' for c in p: if c == ':': root, ext = root + ext + c, '' elif c == '.': if ext: root, ext = root + ext, c else: ext = c elif ext: ext = ext + c else: root = root + c return root, ext def splitdrive(p): """Split a pathname into a drive specification and the rest of the path. Useful on DOS/Windows/NT; on the Mac, the drive is always empty (don't use the volume name -- it doesn't have the same syntactic and semantic oddities as DOS drive letters, such as there being a separate current directory per drive).""" return '', p # Short interfaces to split() def dirname(s): return split(s)[0] def basename(s): return split(s)[1] def isdir(s): """Return true if the pathname refers to an existing directory.""" try: st = os.stat(s) except os.error: return 0 return S_ISDIR(st[ST_MODE]) # Get size, mtime, atime of files. def getsize(filename): """Return the size of a file, reported by os.stat().""" st = os.stat(filename) return st[ST_SIZE] def getmtime(filename): """Return the last modification time of a file, reported by os.stat().""" st = os.stat(filename) return st[ST_MTIME] def getatime(filename): """Return the last access time of a file, reported by os.stat().""" st = os.stat(filename) return st[ST_ATIME] def islink(s): """Return true if the pathname refers to a symbolic link. Always false on the Mac, until we understand Aliases.)""" return 0 def isfile(s): """Return true if the pathname refers to an existing regular file.""" try: st = os.stat(s) except os.error: return 0 return S_ISREG(st[ST_MODE]) def exists(s): """Return true if the pathname refers to an existing file or directory.""" try: st = os.stat(s) except os.error: return 0 return 1 # 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 '' 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 expandvars(path): """Dummy to retain interface-compatibility with other operating systems.""" return path def expanduser(path): """Dummy to retain interface-compatibility with other operating systems.""" return path norm_error = 'macpath.norm_error: path cannot be normalized' def normpath(s): """Normalize a pathname. Will return the same result for equivalent paths.""" if ":" not in s: return ":"+s comps = s.split(":") i = 1 while i < len(comps)-1: if comps[i] == "" and comps[i-1] != "": if i > 1: del comps[i-1:i+1] i = i - 1 else: # best way to handle this is to raise an exception raise norm_error, 'Cannot use :: immedeately after volume name' else: i = i + 1 s = ":".join(comps) # remove trailing ":" except for ":" and "Volume:" if s[-1] == ":" and len(comps) > 2 and s != ":"*len(s): s = s[:-1] return s def walk(top, func, arg): """Directory tree walk. For each directory under top (including top itself), 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.""" 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) def abspath(path): """Return an absolute path.""" if not isabs(path): path = join(os.getcwd(), path) return normpath(path) ```