EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Lib / lib2to3 / pgen2 / literals.py

# Copyright 2004-2005 Elemental Security, Inc. All Rights Reserved.\r
# Licensed to PSF under a Contributor Agreement.\r
\r
"""Safely evaluate Python string literals without using eval()."""\r
\r
import re\r
\r
simple_escapes = {"a": "\a",\r
                  "b": "\b",\r
                  "f": "\f",\r
                  "n": "\n",\r
                  "r": "\r",\r
                  "t": "\t",\r
                  "v": "\v",\r
                  "'": "'",\r
                  '"': '"',\r
                  "\\": "\\"}\r
\r
def escape(m):\r
    all, tail = m.group(0, 1)\r
    assert all.startswith("\\")\r
    esc = simple_escapes.get(tail)\r
    if esc is not None:\r
        return esc\r
    if tail.startswith("x"):\r
        hexes = tail[1:]\r
        if len(hexes) < 2:\r
            raise ValueError("invalid hex string escape ('\\%s')" % tail)\r
        try:\r
            i = int(hexes, 16)\r
        except ValueError:\r
            raise ValueError("invalid hex string escape ('\\%s')" % tail)\r
    else:\r
        try:\r
            i = int(tail, 8)\r
        except ValueError:\r
            raise ValueError("invalid octal string escape ('\\%s')" % tail)\r
    return chr(i)\r
\r
def evalString(s):\r
    assert s.startswith("'") or s.startswith('"'), repr(s[:1])\r
    q = s[0]\r
    if s[:3] == q*3:\r
        q = q*3\r
    assert s.endswith(q), repr(s[-len(q):])\r
    assert len(s) >= 2*len(q)\r
    s = s[len(q):-len(q)]\r
    return re.sub(r"\\(\'|\"|\\|[abfnrtv]|x.{0,2}|[0-7]{1,3})", escape, s)\r
\r
def test():\r
    for i in range(256):\r
        c = chr(i)\r
        s = repr(c)\r
        e = evalString(s)\r
        if e != c:\r
            print i, c, s, e\r
\r
\r
if __name__ == "__main__":\r
    test()\r