blob: c269f21c7fd5170a262b3050e3c697f23f195958 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
#!/usr/bin/python
# Copyright (c) 2008 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""A simple utility function to produce data pack files.
See base/pack_file* for details.
"""
import struct
version = 1
def WriteDataPack(resources, output_file):
"""Write a map of id=>data into output_file as a data pack."""
ids = sorted(resources.keys())
file = open(output_file, "wb")
# Write file header.
file.write(struct.pack("<II", version, len(ids)))
header_length = 2 * 4 # Two uint32s.
index_length = len(ids) * 3 * 4 # Each entry is 3 uint32s.
# Write index.
data_offset = header_length + index_length
for id in ids:
file.write(struct.pack("<III", id, data_offset, len(resources[id])))
data_offset += len(resources[id])
# Write data.
for id in ids:
file.write(resources[id])
def main():
# Just write a simple file.
data = { 1: "", 4: "this is id 4", 6: "this is id 6", 10: "" }
WriteDataPack(data, "datapack")
print "wrote datapack to current directory."
if __name__ == '__main__':
main()
|
