eric6/HexEdit/HexEditChunks.py

Sat, 31 Aug 2019 12:58:11 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 31 Aug 2019 12:58:11 +0200
branch
without_py2_and_pyqt4
changeset 7192
a22eee00b052
parent 6942
2602857055c5
child 7229
53054eb5b15a
permissions
-rw-r--r--

Started removing runtime support for Python2 and PyQt4.

4650
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
1 # -*- coding: utf-8 -*-
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
2
6645
ad476851d7e0 Updated copyright for 2019.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 6048
diff changeset
3 # Copyright (c) 2016 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
4650
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
4 #
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
5
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
6 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
7 Module implementing the storage backend for the hex editor.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
8 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
9
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
10 from __future__ import unicode_literals
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
11
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
12 import sys
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
13
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
14 from PyQt5.QtCore import QBuffer, QIODevice, QByteArray
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
15
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
16
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
17 class HexEditChunk(object):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
18 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
19 Class implementing a container for the data chunks.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
20 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
21 def __init__(self):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
22 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
23 Constructor
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
24 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
25 self.data = bytearray()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
26 self.dataChanged = bytearray()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
27 self.absPos = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
28
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
29
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
30 class HexEditChunks(object):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
31 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
32 Class implementing the storage backend for the hex editor.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
33
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
34 When HexEditWidget loads data, HexEditChunks access them using a QIODevice
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
35 interface. When the app uses a QByteArray or Python bytearray interface,
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
36 QBuffer is used to provide again a QIODevice like interface. No data will
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
37 be changed, therefore HexEditChunks opens the QIODevice in
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
38 QIODevice.ReadOnly mode. After every access HexEditChunks closes the
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
39 QIODevice. That's why external applications can overwrite files while
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
40 HexEditWidget shows them.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
41
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
42 When the the user starts to edit the data, HexEditChunks creates a local
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
43 copy of a chunk of data (4 kilobytes) and notes all changes there. Parallel
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
44 to that chunk, there is a second chunk, which keeps track of which bytes
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
45 are changed and which are not.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
46 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
47 BUFFER_SIZE = 0x10000
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
48 CHUNK_SIZE = 0x1000
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
49 READ_CHUNK_MASK = 0xfffffffffffff000
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
50
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
51 def __init__(self, ioDevice=None):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
52 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
53 Constructor
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
54
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
55 @param ioDevice io device to get the data from
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
56 @type QIODevice
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
57 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
58 self.__ioDevice = None
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
59 self.__pos = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
60 self.__size = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
61 self.__chunks = []
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
62
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
63 if ioDevice is None:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
64 buf = QBuffer()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
65 self.setIODevice(buf)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
66 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
67 self.setIODevice(ioDevice)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
68
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
69 def setIODevice(self, ioDevice):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
70 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
71 Public method to set an io device to read the binary data from.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
72
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
73 @param ioDevice io device to get the data from
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
74 @type QIODevice
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
75 @return flag indicating successful operation
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
76 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
77 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
78 self.__ioDevice = ioDevice
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
79 ok = self.__ioDevice.open(QIODevice.ReadOnly)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
80 if ok:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
81 # open successfully
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
82 self.__size = self.__ioDevice.size()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
83 self.__ioDevice.close()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
84 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
85 # fallback is an empty buffer
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
86 self.__ioDevice = QBuffer()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
87 self.__size = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
88
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
89 self.__chunks = []
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
90 self.__pos = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
91
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
92 return ok
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
93
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
94 def data(self, pos=0, maxSize=-1, highlighted=None):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
95 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
96 Public method to get data out of the chunks.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
97
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
98 @param pos position to get bytes from
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
99 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
100 @param maxSize maximum amount of bytes to get
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
101 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
102 @param highlighted reference to a byte array storing highlighting info
4666
bc52ef526e11 Generated the source docu for the hex editor.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4650
diff changeset
103 @type bytearray
4650
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
104 @return retrieved data
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
105 @rtype bytearray
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
106 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
107 ioDelta = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
108 chunkIdx = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
109
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
110 chunk = HexEditChunk()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
111 buffer = bytearray()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
112
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
113 if highlighted is not None:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
114 del highlighted[:]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
115
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
116 if pos >= self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
117 return buffer
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
118
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
119 if maxSize < 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
120 maxSize = self.__size
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
121 elif (pos + maxSize) > self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
122 maxSize = self.__size - pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
123
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
124 self.__ioDevice.open(QIODevice.ReadOnly)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
125
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
126 while maxSize > 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
127 chunk.absPos = sys.maxsize
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
128 chunksLoopOngoing = True
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
129 while chunkIdx < len(self.__chunks) and chunksLoopOngoing:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
130 # In this section, we track changes before our required data
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
131 # and we take the edited data, if availible. ioDelta is a
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
132 # difference counter to justify the read pointer to the
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
133 # original data, if data in between was deleted or inserted.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
134
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 chunk = self.__chunks[chunkIdx]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
136 if chunk.absPos > pos:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
137 chunksLoopOngoing = False
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
138 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
139 chunkIdx += 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
140 chunkOfs = pos - chunk.absPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 if maxSize > (len(chunk.data) - chunkOfs):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
142 count = len(chunk.data) - chunkOfs
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 ioDelta += self.CHUNK_SIZE - len(chunk.data)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
144 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
145 count = maxSize
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
146 if count > 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
147 buffer += chunk.data[chunkOfs:chunkOfs + count]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
148 maxSize -= count
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149 pos += count
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
150 if highlighted is not None:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 highlighted += \
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
152 chunk.dataChanged[chunkOfs:chunkOfs + count]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
154 if maxSize > 0 and pos < chunk.absPos:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
155 # In this section, we read data from the original source. This
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
156 # will only happen, when no copied data is available.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157 if chunk.absPos - pos > maxSize:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158 byteCount = maxSize
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
159 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160 byteCount = chunk.absPos - pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162 maxSize -= byteCount
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
163 self.__ioDevice.seek(pos + ioDelta)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 readBuffer = bytearray(self.__ioDevice.read(byteCount))
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165 buffer += readBuffer
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166 if highlighted is not None:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 highlighted += bytearray(len(readBuffer))
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168 pos += len(readBuffer)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
169
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
170 self.__ioDevice.close()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
171 return buffer
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 def write(self, ioDevice, pos=0, count=-1):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
174 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
175 Public method to write data to an io device.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177 @param ioDevice io device to write the data to
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
178 @type QIODevice
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
179 @param pos position to write bytes from
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
181 @param count amount of bytes to write
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 @return flag indicating success
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
186 if count == -1:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187 # write all data
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
188 count = self.__size
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
189
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 ok = ioDevice.open(QIODevice.WriteOnly)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 if ok:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 idx = pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193 while idx < count:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 data = self.data(idx, self.BUFFER_SIZE)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195 ioDevice.write(QByteArray(data))
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197 # increment loop variable
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
198 idx += self.BUFFER_SIZE
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
199
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
200 ioDevice.close()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 return ok
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
203
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
204 def setDataChanged(self, pos, dataChanged):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
205 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
206 Public method to set highlighting info.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 @param pos position to set highlighting info for
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210 @param dataChanged flag indicating changed data
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211 @type bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 if pos < 0 or pos >= self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 # position is out of range, do nothing
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
215 return
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
216 chunkIdx = self.__getChunkIndex(pos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
217 posInChunk = pos - self.__chunks[chunkIdx].absPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
218 self.__chunks[chunkIdx].dataChanged[posInChunk] = int(dataChanged)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
219
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
220 def dataChanged(self, pos):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
221 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
222 Public method to test, if some data was changed.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
223
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
224 @param pos byte position to check
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
225 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
226 @return flag indicating the changed state
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
227 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
228 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
229 highlighted = bytearray()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
230 self.data(pos, 1, highlighted)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
231 return highlighted and bool(highlighted[0])
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
232
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
233 def indexOf(self, byteArray, start):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
234 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
235 Public method to search the first occurrence of some data.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
236
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
237 @param byteArray data to search for
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
238 @type bytearray
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
239 @param start position to start the search at
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
240 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
241 @return position the data was found at or -1 if nothing could be found
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
242 @rtype int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
243 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
244 ba = bytearray(byteArray)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
245
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
246 result = -1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
247 pos = start
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
248 while pos < self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
249 buffer = self.data(pos, self.BUFFER_SIZE + len(ba) - 1)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
250 findPos = buffer.find(ba)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
251 if findPos >= 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
252 result = pos + findPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
253 break
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
254
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
255 # increment loop variable
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
256 pos += self.BUFFER_SIZE
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
257
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
258 return result
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
259
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
260 def lastIndexOf(self, byteArray, start):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
261 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
262 Public method to search the last occurrence of some data.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
263
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
264 @param byteArray data to search for
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
265 @type bytearray
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
266 @param start position to start the search at
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
267 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
268 @return position the data was found at or -1 if nothing could be found
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
269 @rtype int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
270 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
271 ba = bytearray(byteArray)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
272
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
273 result = -1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
274 pos = start
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
275 while pos > 0 and result < 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
276 sPos = pos - self.BUFFER_SIZE - len(ba) + 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
277 if sPos < 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
278 sPos = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
279
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
280 buffer = self.data(sPos, pos - sPos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
281 findPos = buffer.rfind(ba)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
282 if findPos >= 0:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
283 result = sPos + findPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
284 break
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
285
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
286 # increment loop variable
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
287 pos -= self.BUFFER_SIZE
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
288
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
289 return result
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
290
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
291 def insert(self, pos, data):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
292 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
293 Public method to insert a byte.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
294
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
295 @param pos position to insert at
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
296 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
297 @param data byte to insert
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
298 @type int (range 0 to 255)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
299 @return flag indicating success
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
300 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
301 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
302 if pos < 0 or pos > self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
303 # position is out of range, do nothing
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
304 return False
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
305
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
306 if pos == self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
307 chunkIdx = self.__getChunkIndex(pos - 1)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
308 else:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
309 chunkIdx = self.__getChunkIndex(pos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
310 chunk = self.__chunks[chunkIdx]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
311 posInChunk = pos - chunk.absPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
312 chunk.data.insert(posInChunk, data)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
313 chunk.dataChanged.insert(posInChunk, 1)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
314 for idx in range(chunkIdx + 1, len(self.__chunks)):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
315 self.__chunks[idx].absPos += 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
316 self.__size += 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
317 self.__pos = pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
318 return True
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
319
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
320 def overwrite(self, pos, data):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
321 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
322 Public method to overwrite a byte.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
323
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
324 @param pos position to overwrite
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
325 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
326 @param data byte to overwrite with
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
327 @type int (range 0 to 255)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
328 @return flag indicating success
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
329 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
330 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
331 if pos < 0 or pos >= self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
332 # position is out of range, do nothing
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
333 return False
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
334
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
335 chunkIdx = self.__getChunkIndex(pos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
336 chunk = self.__chunks[chunkIdx]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
337 posInChunk = pos - chunk.absPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
338 chunk.data[posInChunk] = data
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
339 chunk.dataChanged[posInChunk] = 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
340 self.__pos = pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
341 return True
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
342
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
343 def removeAt(self, pos):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
344 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
345 Public method to remove a byte.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
346
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
347 @param pos position to remove
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
348 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
349 @return flag indicating success
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
350 @rtype bool
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
351 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
352 if pos < 0 or pos >= self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
353 # position is out of range, do nothing
6891
93f82da09f22 Fixed some code style issues detected by the new 'return' checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 6645
diff changeset
354 return False
4650
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
355
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
356 chunkIdx = self.__getChunkIndex(pos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
357 chunk = self.__chunks[chunkIdx]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
358 posInChunk = pos - chunk.absPos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
359 chunk.data.pop(posInChunk)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
360 chunk.dataChanged.pop(posInChunk)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
361 for idx in range(chunkIdx + 1, len(self.__chunks)):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
362 self.__chunks[idx].absPos -= 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
363 self.__size -= 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
364 self.__pos = pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
365 return True
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
366
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
367 def __getitem__(self, pos):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
368 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
369 Special method to get a byte at a position.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
370
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
371 Note: This realizes the [] get operator.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
372
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
373 @param pos position of byte to get
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
374 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
375 @return requested byte
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
376 @rtype int (range 0 to 255)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
377 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
378 if pos >= self.__size:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
379 return 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
380 ## raise IndexError
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
381
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
382 return self.data(pos, 1)[0]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
383
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
384 def pos(self):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
385 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
386 Public method to get the current position.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
387
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
388 @return current position
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
389 @rtype int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
390 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
391 return self.__pos
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
392
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
393 def size(self):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
394 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
395 Public method to get the current data size.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
396
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
397 @return current data size
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
398 @rtype int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
399 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
400 return self.__size
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
401
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
402 def __getChunkIndex(self, absPos):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
403 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
404 Private method to get the chunk index for a position.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
405
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
406 This method checks, if there is already a copied chunk available. If
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
407 there is one, it returns its index. If there is no copied chunk
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
408 available, original data will be copied into a new chunk.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
409
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
410 @param absPos absolute position of the data.
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
411 @type int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
412 @return index of the chunk containing the position
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
413 @rtype int
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
414 """
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
415 foundIdx = -1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
416 insertIdx = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
417 ioDelta = 0
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
418
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
419 for idx in range(len(self.__chunks)):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
420 chunk = self.__chunks[idx]
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
421 if absPos >= chunk.absPos and \
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
422 absPos < (chunk.absPos + len(chunk.data)):
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
423 foundIdx = idx
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
424 break
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
425
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
426 if absPos < chunk.absPos:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
427 insertIdx = idx
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
428 break
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
429
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
430 ioDelta += len(chunk.data) - self.CHUNK_SIZE
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
431 insertIdx = idx + 1
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
432
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
433 if foundIdx == -1:
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
434 newChunk = HexEditChunk()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
435 readAbsPos = absPos - ioDelta
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
436 readPos = readAbsPos & self.READ_CHUNK_MASK
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
437 self.__ioDevice.open(QIODevice.ReadOnly)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
438 self.__ioDevice.seek(readPos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
439 newChunk.data = bytearray(self.__ioDevice.read(self.CHUNK_SIZE))
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
440 self.__ioDevice.close()
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
441 newChunk.absPos = absPos - (readAbsPos - readPos)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
442 newChunk.dataChanged = bytearray(len(newChunk.data))
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
443 self.__chunks.insert(insertIdx, newChunk)
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
444 foundIdx = insertIdx
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
445
b1ca3bcde70b First commit for the new hex editor tool.
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
446 return foundIdx

eric ide

mercurial