import struct
import string
import binascii
-
-DEBUG=0
-if DEBUG:
- testf=open('@binhex.dbg.out', 'w')
Error = 'binhex.Error'
# Various constants
REASONABLY_LARGE=32768 # Minimal amount we pass the rle-coder
-LINELEN=48 # What we pass to hqx-coder at once
- # *NOTE* Must be divisible by 3!
+LINELEN=64
RUNCHAR=chr(0x90) # run-length introducer
#
# The code is currently byte-order dependent
if struct.pack('i', 0177) != '\0\0\0\177':
- raise ImportError, 'Module binhex is big-endian only'
+ raise ImportError, 'Module binhex is big-endian only'
#
# Workarounds for non-mac machines.
if os.name == 'mac':
- import macfs
-
- def FInfo():
+ import macfs
+ import MacOS
+ try:
+ openrf = MacOS.openrf
+ except AttributeError:
+ # Backward compatability
+ openrf = open
+
+ def FInfo():
return macfs.FInfo()
-
- def getfileinfo(name):
+
+ def getfileinfo(name):
finfo = macfs.FSSpec(name).GetFInfo()
dir, file = os.path.split(name)
# XXXX Get resource/data sizes
fp = open(name, 'rb')
fp.seek(0, 2)
dlen = fp.tell()
- fp = open(name, '*rb')
+ fp = openrf(name, '*rb')
fp.seek(0, 2)
rlen = fp.tell()
return file, finfo, dlen, rlen
-
- def openrsrc(name, *mode):
- if mode:
- mode = mode[0]
+
+ def openrsrc(name, *mode):
+ if not mode:
+ mode = '*rb'
else:
- mode = 'rb'
- mode = '*' + mode
- return open(name, mode)
+ mode = '*' + mode[0]
+ return openrf(name, mode)
else:
- #
- # Glue code for non-macintosh useage
- #
- import regsub
-
- class FInfo:
+ #
+ # Glue code for non-macintosh useage
+ #
+ import regsub
+
+ class FInfo:
def __init__(self):
- self.Type = '????'
- self.Creator = '????'
- self.Flags = 0
+ self.Type = '????'
+ self.Creator = '????'
+ self.Flags = 0
- def getfileinfo(name):
+ def getfileinfo(name):
finfo = FInfo()
# Quick check for textfile
fp = open(name)
data = open(name).read(256)
for c in data:
- if not c in string.whitespace and (c<' ' or ord(c) > 0177):
- break
+ if not c in string.whitespace and (c<' ' or ord(c) > 0177):
+ break
else:
- finfo.Type = 'TEXT'
+ finfo.Type = 'TEXT'
fp.seek(0, 2)
dsize = fp.tell()
fp.close()
file = regsub.sub(':', '-', file)
return file, finfo, dsize, 0
- class openrsrc:
+ class openrsrc:
def __init__(self, *args):
- pass
+ pass
def read(self, *args):
- return ''
+ return ''
def write(self, *args):
pass
def close(self):
- pass
+ pass
class _Hqxcoderengine:
- """Write data to the coder in 3-byte chunks"""
-
- def __init__(self, ofp):
+ """Write data to the coder in 3-byte chunks"""
+
+ def __init__(self, ofp):
self.ofp = ofp
self.data = ''
+ self.hqxdata = ''
+ self.linelen = LINELEN-1
- def write(self, data):
+ def write(self, data):
self.data = self.data + data
- while len(self.data) > LINELEN:
- hqxdata = binascii.b2a_hqx(self.data[:LINELEN])
- self.ofp.write(hqxdata+'\n')
- self.data = self.data[LINELEN:]
-
- def close(self):
+ datalen = len(self.data)
+ todo = (datalen/3)*3
+ data = self.data[:todo]
+ self.data = self.data[todo:]
+ self.hqxdata = self.hqxdata + binascii.b2a_hqx(data)
+ while len(self.hqxdata) > self.linelen:
+ self.ofp.write(self.hqxdata[:self.linelen]+'\n')
+ self.hqxdata = self.hqxdata[self.linelen:]
+ self.linelen = LINELEN
+
+ def close(self):
if self.data:
- self.ofp.write(binascii.b2a_hqx(self.data))
+ self.hqxdata = self.hqxdata + binascii.b2a_hqx(self.data)
+ while self.hqxdata:
+ self.ofp.write(self.hqxdata[:self.linelen])
+ self.hqxdata = self.hqxdata[self.linelen:]
+ self.linelen = LINELEN
self.ofp.write(':\n')
self.ofp.close()
+ del self.ofp
class _Rlecoderengine:
- """Write data to the RLE-coder in suitably large chunks"""
+ """Write data to the RLE-coder in suitably large chunks"""
- def __init__(self, ofp):
+ def __init__(self, ofp):
self.ofp = ofp
self.data = ''
- def write(self, data):
- if DEBUG:
- testf.write(data) # XXXX
+ def write(self, data):
self.data = self.data + data
if len(self.data) < REASONABLY_LARGE:
- return
+ return
rledata = binascii.rlecode_hqx(self.data)
self.ofp.write(rledata)
self.data = ''
- def close(self):
+ def close(self):
if self.data:
- rledata = binascii.rlecode_hqx(self.data)
- self.ofp.write(rledata)
+ 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):
- if type(ofp) == type(''):
- ofname = ofp
- ofp = open(ofname, 'w')
- if os.name == 'mac':
- fss = macfs.FSSpec(ofname)
- fss.SetCreatorType('BnHq', 'TEXT')
- ofp.write('(This file may be decompressed with BinHex 4.0)\n\n:')
+ def __init__(self, (name, finfo, dlen, rlen), ofp):
+ if type(ofp) == type(''):
+ ofname = ofp
+ ofp = open(ofname, 'w')
+ if os.name == 'mac':
+ fss = macfs.FSSpec(ofname)
+ fss.SetCreatorType('BnHq', 'TEXT')
+ ofp.write('(This file must be converted with BinHex 4.0)\n\n:')
hqxer = _Hqxcoderengine(ofp)
self.ofp = _Rlecoderengine(hqxer)
self.crc = 0
if finfo == None:
- finfo = FInfo()
+ finfo = FInfo()
self.dlen = dlen
self.rlen = rlen
self._writeinfo(name, finfo)
self.state = _DID_HEADER
- def _writeinfo(self, name, finfo):
- if DEBUG:
- print 'binhex info:', name, finfo.Type, finfo.Creator, self.dlen, self.rlen
+ def _writeinfo(self, name, finfo):
name = name
nl = len(name)
if nl > 63:
- raise Error, 'Filename too long'
+ raise Error, 'Filename too long'
d = chr(nl) + name + '\0'
d2 = finfo.Type + finfo.Creator
d3 = struct.pack('h', finfo.Flags)
self._write(info)
self._writecrc()
- def _write(self, data):
+ def _write(self, data):
self.crc = binascii.crc_hqx(data, self.crc)
self.ofp.write(data)
- def _writecrc(self):
-## self.crc = binascii.crc_hqx('\0\0', self.crc) # XXXX Should this be here??
+ def _writecrc(self):
+## self.crc = binascii.crc_hqx('\0\0', self.crc) # XXXX Should this be here??
self.ofp.write(struct.pack('h', self.crc))
self.crc = 0
- def write(self, data):
+ def write(self, data):
if self.state != _DID_HEADER:
- raise Error, 'Writing data at the wrong time'
+ raise Error, 'Writing data at the wrong time'
self.dlen = self.dlen - len(data)
self._write(data)
- def close_data(self):
+ def close_data(self):
if self.dlen <> 0:
- raise Error, 'Incorrect data size, diff='+`self.rlen`
+ raise Error, 'Incorrect data size, diff='+`self.rlen`
self._writecrc()
self.state = _DID_DATA
- def write_rsrc(self, data):
+ def write_rsrc(self, data):
if self.state < _DID_DATA:
- self.close_data()
+ self.close_data()
if self.state != _DID_DATA:
- raise Error, 'Writing resource data at the wrong time'
+ raise Error, 'Writing resource data at the wrong time'
self.rlen = self.rlen - len(data)
self._write(data)
- def close(self):
+ def close(self):
if self.state < _DID_DATA:
- self.close_data()
+ self.close_data()
if self.state != _DID_DATA:
- raise Error, 'Close at the wrong time'
+ raise Error, 'Close at the wrong time'
if self.rlen <> 0:
- raise Error, "Incorrect resource-datasize, diff="+`self.rlen`
+ raise Error, "Incorrect resource-datasize, diff="+`self.rlen`
self._writecrc()
self.ofp.close()
self.state = None
+ del self.ofp
def binhex(inp, out):
"""(infilename, outfilename) - Create binhex-encoded copy of a file"""
ifp = open(inp, 'rb')
# XXXX Do textfile translation on non-mac systems
- d = ifp.read()
- ofp.write(d)
+ while 1:
+ d = ifp.read(128000)
+ if not d: break
+ ofp.write(d)
ofp.close_data()
ifp.close()
ifp = openrsrc(inp, 'rb')
- d = ifp.read()
- ofp.write_rsrc(d)
+ while 1:
+ d = ifp.read(128000)
+ if not d: break
+ ofp.write_rsrc(d)
ofp.close()
- ifp.close()
+ ifp.close()
class _Hqxdecoderengine:
- """Read data via the decoder in 4-byte chunks"""
-
- def __init__(self, ifp):
+ """Read data via the decoder in 4-byte chunks"""
+
+ def __init__(self, ifp):
self.ifp = ifp
self.eof = 0
- def read(self, totalwtd):
+ def read(self, totalwtd):
"""Read at least wtd bytes (or until EOF)"""
decdata = ''
wtd = totalwtd
raise Error, 'Premature EOF on binhex file'
return decdata
- def close(self):
+ def close(self):
self.ifp.close()
class _Rledecoderengine:
- """Read data via the RLE-coder"""
+ """Read data via the RLE-coder"""
- def __init__(self, ifp):
+ def __init__(self, ifp):
self.ifp = ifp
self.pre_buffer = ''
self.post_buffer = ''
self.eof = 0
- def read(self, wtd):
+ def read(self, wtd):
if wtd > len(self.post_buffer):
- self._fill(wtd-len(self.post_buffer))
+ self._fill(wtd-len(self.post_buffer))
rv = self.post_buffer[:wtd]
self.post_buffer = self.post_buffer[wtd:]
- print 'WTD', wtd, 'GOT', len(rv)
return rv
- def _fill(self, wtd):
+ def _fill(self, wtd):
#
# Obfuscated code ahead. We keep at least one byte in the pre_buffer,
# so we don't stumble over an orphaned RUNCHAR later on. If the
binascii.rledecode_hqx(self.pre_buffer[:mark])
self.pre_buffer = self.pre_buffer[mark:]
- def close(self):
+ def close(self):
self.ifp.close()
class HexBin:
- def __init__(self, ifp):
+ def __init__(self, ifp):
if type(ifp) == type(''):
- ifp = open(ifp)
+ ifp = open(ifp)
#
# Find initial colon.
#
break
if ch != '\n':
dummy = ifp.readline()
- if DEBUG:
- print 'SKIP:', ch+dummy
hqxifp = _Hqxdecoderengine(ifp)
self.ifp = _Rledecoderengine(hqxifp)
self.crc = 0
self._readheader()
- def _read(self, len):
+ def _read(self, len):
data = self.ifp.read(len)
self.crc = binascii.crc_hqx(data, self.crc)
return data
- def _checkcrc(self):
+ 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 DEBUG:
- print 'DBG CRC %x %x'%(self.crc, filecrc)
if filecrc != self.crc:
raise Error, 'CRC error, computed %x, read %x'%(self.crc, filecrc)
self.crc = 0
- def _readheader(self):
+ def _readheader(self):
len = self._read(1)
fname = self._read(ord(len))
rest = self._read(1+4+4+2+4+4)
self.dlen = struct.unpack('l', rest[11:15])[0]
self.rlen = struct.unpack('l', rest[15:19])[0]
- if DEBUG:
- print 'DATA, RLEN', self.dlen, self.rlen
-
self.FName = fname
self.FInfo = FInfo()
self.FInfo.Creator = creator
self.state = _DID_HEADER
- def read(self, *n):
+ def read(self, *n):
if self.state != _DID_HEADER:
raise Error, 'Read data at wrong time'
if n:
self.dlen = self.dlen - n
return self._read(n)
- def close_data(self):
- if self.state != _DID_HEADER:
- raise Error, 'close_data at wrong time'
- if self.dlen:
+ 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
+ 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 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.rlen:
- dummy = self.read_rsrc(self.rlen)
- self._checkcrc()
- self.state = _DID_RSRC
- self.ifp.close()
+ def close(self):
+ if self.rlen:
+ dummy = self.read_rsrc(self.rlen)
+ self._checkcrc()
+ self.state = _DID_RSRC
+ self.ifp.close()
def hexbin(inp, out):
"""(infilename, outfilename) - Decode binhexed file"""
ofp = open(out, 'wb')
# XXXX Do translation on non-mac systems
- d = ifp.read()
- ofp.write(d)
+ while 1:
+ d = ifp.read(128000)
+ if not d: break
+ ofp.write(d)
ofp.close()
ifp.close_data()
- d = ifp.read_rsrc()
+ d = ifp.read_rsrc(128000)
if d:
ofp = openrsrc(out, 'wb')
ofp.write(d)
+ while 1:
+ d = ifp.read_rsrc(128000)
+ if not d: break
+ ofp.write(d)
ofp.close()
if os.name == 'mac':
if __name__ == '__main__':
_test()
-
projects / python / commitdiff