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$lad*j"Tځz@ؔţ N9"""Macintosh binhex compression/decompression. easy interface: binhex(inputfilename, outputfilename) hexbin(inputfilename, outputfilename) """ # # Jack Jansen, CWI, August 1995. # # The module is supposed to be as compatible as possible. Especially the # easy interface should work "as expected" on any platform. # XXXX Note: currently, textfiles appear in mac-form on all platforms. # We seem to lack a simple character-translate in python. # (we should probably use ISO-Latin-1 on all but the mac platform). # XXXX The simple routines are too simple: they expect to hold the complete # files in-core. Should be fixed. # XXXX It would be nice to handle AppleDouble format on unix # (for servers serving macs). # XXXX I don't understand what happens when you get 0x90 times the same byte on # input. The resulting code (xx 90 90) would appear to be interpreted as an # escaped *value* of 0x90. All coders I've seen appear to ignore this nicety... # import binascii import contextlib import io import os import struct import warnings warnings.warn('the binhex module is deprecated', DeprecationWarning, stacklevel=2) __all__ = ["binhex","hexbin","Error"] class Error(Exception): pass # States (what have we written) _DID_HEADER = 0 _DID_DATA = 1 # Various constants REASONABLY_LARGE = 32768 # Minimal amount we pass the rle-coder LINELEN = 64 RUNCHAR = b"\x90" # # This code is no longer byte-order dependent class FInfo: def __init__(self): self.Type = '????' self.Creator = '????' self.Flags = 0 def getfileinfo(name): finfo = FInfo() with io.open(name, 'rb') as fp: # Quick check for textfile data = fp.read(512) if 0 not in data: finfo.Type = 'TEXT' fp.seek(0, 2) dsize = fp.tell() dir, file = os.path.split(name) file = file.replace(':', '-', 1) return file, finfo, dsize, 0 class openrsrc: def __init__(self, *args): pass def read(self, *args): return b'' def write(self, *args): pass def close(self): pass # DeprecationWarning is already emitted on "import binhex". There is no need # to repeat the warning at each call to deprecated binascii functions. @contextlib.contextmanager def _ignore_deprecation_warning(): with warnings.catch_warnings(): warnings.filterwarnings('ignore', '', DeprecationWarning) yield class _Hqxcoderengine: """Write data to the coder in 3-byte chunks""" def __init__(self, ofp): self.ofp = ofp self.data = b'' self.hqxdata = b'' self.linelen = LINELEN - 1 def write(self, data): self.data = self.data + data datalen = len(self.data) todo = (datalen // 3) * 3 data = self.data[:todo] self.data = self.data[todo:] if not data: return with _ignore_deprecation_warning(): self.hqxdata = self.hqxdata + binascii.b2a_hqx(data) self._flush(0) def _flush(self, force): first = 0 while first <= len(self.hqxdata) - self.linelen: last = first + self.linelen self.ofp.write(self.hqxdata[first:last] + b'\r') self.linelen = LINELEN first = last self.hqxdata = self.hqxdata[first:] if force: self.ofp.write(self.hqxdata + b':\r') def close(self): if self.data: with _ignore_deprecation_warning(): self.hqxdata = self.hqxdata + binascii.b2a_hqx(self.data) self._flush(1) self.ofp.close() del self.ofp class _Rle