зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.6 KiB
Python
Executable File
105 строки
3.6 KiB
Python
Executable File
#! /usr/bin/env python2.2
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# Copyright 1994 by Lance Ellinghouse
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# Cathedral City, California Republic, United States of America.
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# All Rights Reserved
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose and without fee is hereby granted,
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# provided that the above copyright notice appear in all copies and that
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# both that copyright notice and this permission notice appear in
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# supporting documentation, and that the name of Lance Ellinghouse
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# not be used in advertising or publicity pertaining to distribution
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# of the software without specific, written prior permission.
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# LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
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# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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# FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
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# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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# Modified by Jack Jansen, CWI, July 1995:
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# - Use binascii module to do the actual line-by-line conversion
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# between ascii and binary. This results in a 1000-fold speedup. The C
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# version is still 5 times faster, though.
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# - Arguments more compliant with python standard
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"""Implementation of the UUencode and UUdecode functions.
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encode(in_file, out_file [,name, mode])
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decode(in_file [, out_file, mode])
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"""
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import binascii
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import os
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import sys
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from types import StringType
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__all__ = ["Error", "decode"]
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class Error(Exception):
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pass
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def decode(in_file, out_file=None, mode=None, quiet=0):
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"""Decode uuencoded file"""
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#
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# Open the input file, if needed.
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#
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if in_file == '-':
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in_file = sys.stdin
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elif isinstance(in_file, StringType):
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in_file = open(in_file)
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#
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# Read until a begin is encountered or we've exhausted the file
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#
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while 1:
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hdr = in_file.readline()
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if not hdr:
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raise Error, 'No valid begin line found in input file'
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if hdr[:5] != 'begin':
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continue
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hdrfields = hdr.split(" ", 2)
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if len(hdrfields) == 3 and hdrfields[0] == 'begin':
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try:
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int(hdrfields[1], 8)
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start_pos = in_file.tell() - len (hdr)
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break
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except ValueError:
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pass
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if out_file is None:
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out_file = hdrfields[2].rstrip()
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if os.path.exists(out_file):
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raise Error, 'Cannot overwrite existing file: %s' % out_file
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if mode is None:
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mode = int(hdrfields[1], 8)
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#
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# Open the output file
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#
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if out_file == '-':
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out_file = sys.stdout
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elif isinstance(out_file, StringType):
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fp = open(out_file, 'wb')
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try:
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os.path.chmod(out_file, mode)
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except AttributeError:
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pass
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out_file = fp
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#
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# Main decoding loop
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#
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s = in_file.readline()
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while s and s.strip() != 'end':
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try:
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data = binascii.a2b_uu(s)
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except binascii.Error, v:
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# Workaround for broken uuencoders by /Fredrik Lundh
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nbytes = (((ord(s[0])-32) & 63) * 4 + 5) / 3
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data = binascii.a2b_uu(s[:nbytes])
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if not quiet:
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sys.stderr.write("Warning: %s\n" % str(v))
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out_file.write(data)
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s = in_file.readline()
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# if not s:
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# raise Error, 'Truncated input file'
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return (hdrfields[2].rstrip(), start_pos, in_file.tell())
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