mirror of
https://github.com/elliotnunn/macresources.git
synced 2024-12-12 03:29:15 +00:00
Steal binhex.py (deprecated in 3.10)
This commit is contained in:
Elliot Nunn
parent
495004c0db
commit
7b25e03e64
2
bin/Rhqx
2
bin/Rhqx
@ -1,7 +1,7 @@
|
||||
from os import path
|
||||
import argparse
|
||||
import binhex
|
||||
import macresources
|
||||
from macresources import binhex
|
||||
|
||||
parser = argparse.ArgumentParser(description='''
|
||||
Convert a "rdump" file (provide base name) to hqx
|
||||
|
||||
@ -1 +1,2 @@
|
||||
from .main import parse_rez_code, parse_file, make_rez_code, make_file, Resource, ResourceAttrs
|
||||
from . import binhex
|
||||
|
||||
479
macresources/binhex.py
Normal file
479
macresources/binhex.py
Normal file
@ -0,0 +1,479 @@
|
||||
"""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 io
|
||||
import os
|
||||
import struct
|
||||
import binascii
|
||||
|
||||
__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
|
||||
|
||||
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
|
||||
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'\n')
|
||||
self.linelen = LINELEN
|
||||
first = last
|
||||
self.hqxdata = self.hqxdata[first:]
|
||||
if force:
|
||||
self.ofp.write(self.hqxdata + b':\n')
|
||||
|
||||
def close(self):
|
||||
if self.data:
|
||||
self.hqxdata = self.hqxdata + binascii.b2a_hqx(self.data)
|
||||
self._flush(1)
|
||||
self.ofp.close()
|
||||
del self.ofp
|
||||
|
||||
class _Rlecoderengine:
|
||||
"""Write data to the RLE-coder in suitably large chunks"""
|
||||
|
||||
def __init__(self, ofp):
|
||||
self.ofp = ofp
|
||||
self.data = b''
|
||||
|
||||
def write(self, data):
|
||||
self.data = self.data + data
|
||||
if len(self.data) < REASONABLY_LARGE:
|
||||
return
|
||||
rledata = binascii.rlecode_hqx(self.data)
|
||||
self.ofp.write(rledata)
|
||||
self.data = b''
|
||||
|
||||
def close(self):
|
||||
if self.data:
|
||||
rledata = binascii.rlecode_hqx(self.data)
|
||||
self.ofp.write(rledata)
|
||||
self.ofp.close()
|
||||
del self.ofp
|
||||
|
||||
class BinHex:
|
||||
def __init__(self, name_finfo_dlen_rlen, ofp):
|
||||
name, finfo, dlen, rlen = name_finfo_dlen_rlen
|
||||
close_on_error = False
|
||||
if isinstance(ofp, str):
|
||||
ofname = ofp
|
||||
ofp = io.open(ofname, 'wb')
|
||||
close_on_error = True
|
||||
try:
|
||||
ofp.write(b'(This file must be converted with BinHex 4.0)\r\r:')
|
||||
hqxer = _Hqxcoderengine(ofp)
|
||||
self.ofp = _Rlecoderengine(hqxer)
|
||||
self.crc = 0
|
||||
if finfo is None:
|
||||
finfo = FInfo()
|
||||
self.dlen = dlen
|
||||
self.rlen = rlen
|
||||
self._writeinfo(name, finfo)
|
||||
self.state = _DID_HEADER
|
||||
except:
|
||||
if close_on_error:
|
||||
ofp.close()
|
||||
raise
|
||||
|
||||
def _writeinfo(self, name, finfo):
|
||||
nl = len(name)
|
||||
if nl > 63:
|
||||
raise Error('Filename too long')
|
||||
d = bytes([nl]) + name.encode("latin-1") + b'\0'
|
||||
tp, cr = finfo.Type, finfo.Creator
|
||||
if isinstance(tp, str):
|
||||
tp = tp.encode("latin-1")
|
||||
if isinstance(cr, str):
|
||||
cr = cr.encode("latin-1")
|
||||
d2 = tp + cr
|
||||
|
||||
# Force all structs to be packed with big-endian
|
||||
d3 = struct.pack('>h', finfo.Flags)
|
||||
d4 = struct.pack('>ii', self.dlen, self.rlen)
|
||||
info = d + d2 + d3 + d4
|
||||
self._write(info)
|
||||
self._writecrc()
|
||||
|
||||
def _write(self, data):
|
||||
self.crc = binascii.crc_hqx(data, self.crc)
|
||||
self.ofp.write(data)
|
||||
|
||||
def _writecrc(self):
|
||||
# XXXX Should this be here??
|
||||
# self.crc = binascii.crc_hqx('\0\0', self.crc)
|
||||
if self.crc < 0:
|
||||
fmt = '>h'
|
||||
else:
|
||||
fmt = '>H'
|
||||
self.ofp.write(struct.pack(fmt, self.crc))
|
||||
self.crc = 0
|
||||
|
||||
def write(self, data):
|
||||
if self.state != _DID_HEADER:
|
||||
raise Error('Writing data at the wrong time')
|
||||
self.dlen = self.dlen - len(data)
|
||||
self._write(data)
|
||||
|
||||
def close_data(self):
|
||||
if self.dlen != 0:
|
||||
raise Error('Incorrect data size, diff=%r' % (self.rlen,))
|
||||
self._writecrc()
|
||||
self.state = _DID_DATA
|
||||
|
||||
def write_rsrc(self, data):
|
||||
if self.state < _DID_DATA:
|
||||
self.close_data()
|
||||
if self.state != _DID_DATA:
|
||||
raise Error('Writing resource data at the wrong time')
|
||||
self.rlen = self.rlen - len(data)
|
||||
self._write(data)
|
||||
|
||||
def close(self):
|
||||
if self.state is None:
|
||||
return
|
||||
try:
|
||||
if self.state < _DID_DATA:
|
||||
self.close_data()
|
||||
if self.state != _DID_DATA:
|
||||
raise Error('Close at the wrong time')
|
||||
if self.rlen != 0:
|
||||
raise Error("Incorrect resource-datasize, diff=%r" % (self.rlen,))
|
||||
self._writecrc()
|
||||
finally:
|
||||
self.state = None
|
||||
ofp = self.ofp
|
||||
del self.ofp
|
||||
ofp.close()
|
||||
|
||||
def binhex(inp, out):
|
||||
"""binhex(infilename, outfilename): create binhex-encoded copy of a file"""
|
||||
finfo = getfileinfo(inp)
|
||||
ofp = BinHex(finfo, out)
|
||||
|
||||
with io.open(inp, 'rb') as ifp:
|
||||
# XXXX Do textfile translation on non-mac systems
|
||||
while True:
|
||||
d = ifp.read(128000)
|
||||
if not d: break
|
||||
ofp.write(d)
|
||||
ofp.close_data()
|
||||
|
||||
ifp = openrsrc(inp, 'rb')
|
||||
while True:
|
||||
d = ifp.read(128000)
|
||||
if not d: break
|
||||
ofp.write_rsrc(d)
|
||||
ofp.close()
|
||||
ifp.close()
|
||||
|
||||
class _Hqxdecoderengine:
|
||||
"""Read data via the decoder in 4-byte chunks"""
|
||||
|
||||
def __init__(self, ifp):
|
||||
self.ifp = ifp
|
||||
self.eof = 0
|
||||
|
||||
def read(self, totalwtd):
|
||||
"""Read at least wtd bytes (or until EOF)"""
|
||||
decdata = b''
|
||||
wtd = totalwtd
|
||||
#
|
||||
# The loop here is convoluted, since we don't really now how
|
||||
# much to decode: there may be newlines in the incoming data.
|
||||
while wtd > 0:
|
||||
if self.eof: return decdata
|
||||
wtd = ((wtd + 2) // 3) * 4
|
||||
data = self.ifp.read(wtd)
|
||||
#
|
||||
# Next problem: there may not be a complete number of
|
||||
# bytes in what we pass to a2b. Solve by yet another
|
||||
# loop.
|
||||
#
|
||||
while True:
|
||||
try:
|
||||
decdatacur, self.eof = binascii.a2b_hqx(data)
|
||||
break
|
||||
except binascii.Incomplete:
|
||||
pass
|
||||
newdata = self.ifp.read(1)
|
||||
if not newdata:
|
||||
raise Error('Premature EOF on binhex file')
|
||||
data = data + newdata
|
||||
decdata = decdata + decdatacur
|
||||
wtd = totalwtd - len(decdata)
|
||||
if not decdata and not self.eof:
|
||||
raise Error('Premature EOF on binhex file')
|
||||
return decdata
|
||||
|
||||
def close(self):
|
||||
self.ifp.close()
|
||||
|
||||
class _Rledecoderengine:
|
||||
"""Read data via the RLE-coder"""
|
||||
|
||||
def __init__(self, ifp):
|
||||
self.ifp = ifp
|
||||
self.pre_buffer = b''
|
||||
self.post_buffer = b''
|
||||
self.eof = 0
|
||||
|
||||
def read(self, wtd):
|
||||
if wtd > len(self.post_buffer):
|
||||
self._fill(wtd - len(self.post_buffer))
|
||||
rv = self.post_buffer[:wtd]
|
||||
self.post_buffer = self.post_buffer[wtd:]
|
||||
return rv
|
||||
|
||||
def _fill(self, wtd):
|
||||
self.pre_buffer = self.pre_buffer + self.ifp.read(wtd + 4)
|
||||
if self.ifp.eof:
|
||||
self.post_buffer = self.post_buffer + \
|
||||
binascii.rledecode_hqx(self.pre_buffer)
|
||||
self.pre_buffer = b''
|
||||
return
|
||||
|
||||
#
|
||||
# Obfuscated code ahead. We have to take care that we don't
|
||||
# end up with an orphaned RUNCHAR later on. So, we keep a couple
|
||||
# of bytes in the buffer, depending on what the end of
|
||||
# the buffer looks like:
|
||||
# '\220\0\220' - Keep 3 bytes: repeated \220 (escaped as \220\0)
|
||||
# '?\220' - Keep 2 bytes: repeated something-else
|
||||
# '\220\0' - Escaped \220: Keep 2 bytes.
|
||||
# '?\220?' - Complete repeat sequence: decode all
|
||||
# otherwise: keep 1 byte.
|
||||
#
|
||||
mark = len(self.pre_buffer)
|
||||
if self.pre_buffer[-3:] == RUNCHAR + b'\0' + RUNCHAR:
|
||||
mark = mark - 3
|
||||
elif self.pre_buffer[-1:] == RUNCHAR:
|
||||
mark = mark - 2
|
||||
elif self.pre_buffer[-2:] == RUNCHAR + b'\0':
|
||||
mark = mark - 2
|
||||
elif self.pre_buffer[-2:-1] == RUNCHAR:
|
||||
pass # Decode all
|
||||
else:
|
||||
mark = mark - 1
|
||||
|
||||
self.post_buffer = self.post_buffer + \
|
||||
binascii.rledecode_hqx(self.pre_buffer[:mark])
|
||||
self.pre_buffer = self.pre_buffer[mark:]
|
||||
|
||||
def close(self):
|
||||
self.ifp.close()
|
||||
|
||||
class HexBin:
|
||||
def __init__(self, ifp):
|
||||
if isinstance(ifp, str):
|
||||
ifp = io.open(ifp, 'rb')
|
||||
#
|
||||
# Find initial colon.
|
||||
#
|
||||
while True:
|
||||
ch = ifp.read(1)
|
||||
if not ch:
|
||||
raise Error("No binhex data found")
|
||||
# Cater for \r\n terminated lines (which show up as \n\r, hence
|
||||
# all lines start with \r)
|
||||
if ch == b'\r':
|
||||
continue
|
||||
if ch == b':':
|
||||
break
|
||||
|
||||
hqxifp = _Hqxdecoderengine(ifp)
|
||||
self.ifp = _Rledecoderengine(hqxifp)
|
||||
self.crc = 0
|
||||
self._readheader()
|
||||
|
||||
def _read(self, len):
|
||||
data = self.ifp.read(len)
|
||||
self.crc = binascii.crc_hqx(data, self.crc)
|
||||
return data
|
||||
|
||||
def _checkcrc(self):
|
||||
filecrc = struct.unpack('>h', self.ifp.read(2))[0] & 0xffff
|
||||
#self.crc = binascii.crc_hqx('\0\0', self.crc)
|
||||
# XXXX Is this needed??
|
||||
self.crc = self.crc & 0xffff
|
||||
if filecrc != self.crc:
|
||||
raise Error('CRC error, computed %x, read %x'
|
||||
% (self.crc, filecrc))
|
||||
self.crc = 0
|
||||
|
||||
def _readheader(self):
|
||||
len = self._read(1)
|
||||
fname = self._read(ord(len))
|
||||
rest = self._read(1 + 4 + 4 + 2 + 4 + 4)
|
||||
self._checkcrc()
|
||||
|
||||
type = rest[1:5]
|
||||
creator = rest[5:9]
|
||||
flags = struct.unpack('>h', rest[9:11])[0]
|
||||
self.dlen = struct.unpack('>l', rest[11:15])[0]
|
||||
self.rlen = struct.unpack('>l', rest[15:19])[0]
|
||||
|
||||
self.FName = fname
|
||||
self.FInfo = FInfo()
|
||||
self.FInfo.Creator = creator
|
||||
self.FInfo.Type = type
|
||||
self.FInfo.Flags = flags
|
||||
|
||||
self.state = _DID_HEADER
|
||||
|
||||
def read(self, *n):
|
||||
if self.state != _DID_HEADER:
|
||||
raise Error('Read data at wrong time')
|
||||
if n:
|
||||
n = n[0]
|
||||
n = min(n, self.dlen)
|
||||
else:
|
||||
n = self.dlen
|
||||
rv = b''
|
||||
while len(rv) < n:
|
||||
rv = rv + self._read(n-len(rv))
|
||||
self.dlen = self.dlen - n
|
||||
return rv
|
||||
|
||||
def close_data(self):
|
||||
if self.state != _DID_HEADER:
|
||||
raise Error('close_data at wrong time')
|
||||
if self.dlen:
|
||||
dummy = self._read(self.dlen)
|
||||
self._checkcrc()
|
||||
self.state = _DID_DATA
|
||||
|
||||
def read_rsrc(self, *n):
|
||||
if self.state == _DID_HEADER:
|
||||
self.close_data()
|
||||
if self.state != _DID_DATA:
|
||||
raise Error('Read resource data at wrong time')
|
||||
if n:
|
||||
n = n[0]
|
||||
n = min(n, self.rlen)
|
||||
else:
|
||||
n = self.rlen
|
||||
self.rlen = self.rlen - n
|
||||
return self._read(n)
|
||||
|
||||
def close(self):
|
||||
if self.state is None:
|
||||
return
|
||||
try:
|
||||
if self.rlen:
|
||||
dummy = self.read_rsrc(self.rlen)
|
||||
self._checkcrc()
|
||||
finally:
|
||||
self.state = None
|
||||
self.ifp.close()
|
||||
|
||||
def hexbin(inp, out):
|
||||
"""hexbin(infilename, outfilename) - Decode binhexed file"""
|
||||
ifp = HexBin(inp)
|
||||
finfo = ifp.FInfo
|
||||
if not out:
|
||||
out = ifp.FName
|
||||
|
||||
with io.open(out, 'wb') as ofp:
|
||||
# XXXX Do translation on non-mac systems
|
||||
while True:
|
||||
d = ifp.read(128000)
|
||||
if not d: break
|
||||
ofp.write(d)
|
||||
ifp.close_data()
|
||||
|
||||
d = ifp.read_rsrc(128000)
|
||||
if d:
|
||||
ofp = openrsrc(out, 'wb')
|
||||
ofp.write(d)
|
||||
while True:
|
||||
d = ifp.read_rsrc(128000)
|
||||
if not d: break
|
||||
ofp.write(d)
|
||||
ofp.close()
|
||||
|
||||
ifp.close()
|
||||
Loading…
Reference in New Issue
Block a user