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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
from __future__ import unicode_literals, division, absolute_import, print_function
from .compatibility_utils import PY2, hexlify, bstr, bord, bchar
import datetime
if PY2:
range = xrange
# note: struct pack, unpack, unpack_from all require bytestring format
# data all the way up to at least python 2.7.5, python 3 okay with bytestring
import struct
from .unipath import pathof
DUMP = False
""" Set to True to dump all possible information. """
class unpackException(Exception):
pass
def describe(data):
txtans = ''
hexans = hexlify(data)
for i in data:
if bord(i) < 32 or bord(i) > 127:
txtans += '?'
else:
txtans += bchar(i).decode('latin-1')
return '"' + txtans + '"' + ' 0x'+ hexans
def datetimefrompalmtime(palmtime):
if palmtime > 0x7FFFFFFF:
pythondatetime = datetime.datetime(year=1904,month=1,day=1)+datetime.timedelta(seconds=palmtime)
else:
pythondatetime = datetime.datetime(year=1970,month=1,day=1)+datetime.timedelta(seconds=palmtime)
return pythondatetime
class Sectionizer:
def __init__(self, filename):
self.data = b''
with open(pathof(filename), 'rb') as f:
self.data = f.read()
self.palmheader = self.data[:78]
self.palmname = self.data[:32]
self.ident = self.palmheader[0x3C:0x3C+8]
self.num_sections, = struct.unpack_from(b'>H', self.palmheader, 76)
self.filelength = len(self.data)
sectionsdata = struct.unpack_from(bstr('>%dL' % (self.num_sections*2)), self.data, 78) + (self.filelength, 0)
self.sectionoffsets = sectionsdata[::2]
self.sectionattributes = sectionsdata[1::2]
self.sectiondescriptions = ["" for x in range(self.num_sections+1)]
self.sectiondescriptions[-1] = "File Length Only"
return
def dumpsectionsinfo(self):
print("Section Offset Length UID Attribs Description")
for i in range(self.num_sections):
print("%3d %3X 0x%07X 0x%05X % 8d % 7d %s" % (i,i, self.sectionoffsets[i], self.sectionoffsets[
i+1] - self.sectionoffsets[i], self.sectionattributes[i]&0xFFFFFF, (self.sectionattributes[i]>>24)&0xFF, self.sectiondescriptions[i]))
print("%3d %3X 0x%07X %s" %
(self.num_sections,self.num_sections, self.sectionoffsets[self.num_sections], self.sectiondescriptions[self.num_sections]))
def setsectiondescription(self, section, description):
if section < len(self.sectiondescriptions):
self.sectiondescriptions[section] = description
else:
print("Section out of range: %d, description %s" % (section,description))
def dumppalmheader(self):
print("Palm Database Header")
print("Database name: " + repr(self.palmheader[:32]))
dbattributes, = struct.unpack_from(b'>H', self.palmheader, 32)
print("Bitfield attributes: 0x%0X" % dbattributes,)
if dbattributes != 0:
print(" (",)
if (dbattributes & 2):
print("Read-only; ",)
if (dbattributes & 4):
print("Dirty AppInfoArea; ",)
if (dbattributes & 8):
print("Needs to be backed up; ",)
if (dbattributes & 16):
print("OK to install over newer; ",)
if (dbattributes & 32):
print("Reset after installation; ",)
if (dbattributes & 64):
print("No copying by PalmPilot beaming; ",)
print(")")
else:
print("")
print("File version: %d" % struct.unpack_from(b'>H', self.palmheader, 34)[0])
dbcreation, = struct.unpack_from(b'>L', self.palmheader, 36)
print("Creation Date: " + str(datetimefrompalmtime(dbcreation))+ (" (0x%0X)" % dbcreation))
dbmodification, = struct.unpack_from(b'>L', self.palmheader, 40)
print("Modification Date: " + str(datetimefrompalmtime(dbmodification))+ (" (0x%0X)" % dbmodification))
dbbackup, = struct.unpack_from(b'>L', self.palmheader, 44)
if dbbackup != 0:
print("Backup Date: " + str(datetimefrompalmtime(dbbackup))+ (" (0x%0X)" % dbbackup))
print("Modification No.: %d" % struct.unpack_from(b'>L', self.palmheader, 48)[0])
print("App Info offset: 0x%0X" % struct.unpack_from(b'>L', self.palmheader, 52)[0])
print("Sort Info offset: 0x%0X" % struct.unpack_from(b'>L', self.palmheader, 56)[0])
print("Type/Creator: %s/%s" % (repr(self.palmheader[60:64]), repr(self.palmheader[64:68])))
print("Unique seed: 0x%0X" % struct.unpack_from(b'>L', self.palmheader, 68)[0])
expectedzero, = struct.unpack_from(b'>L', self.palmheader, 72)
if expectedzero != 0:
print("Should be zero but isn't: %d" % struct.unpack_from(b'>L', self.palmheader, 72)[0])
print("Number of sections: %d" % struct.unpack_from(b'>H', self.palmheader, 76)[0])
return
def loadSection(self, section):
before, after = self.sectionoffsets[section:section+2]
return self.data[before:after]
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