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#!/usr/bin/python -u
# -*- coding: utf-8 -*-
from defs import CHUNK_TYPE
class StringBlock():
def __init__(self, reader):
magic = reader.readInt()
if magic != CHUNK_TYPE:
raise Exception("Bad Magic Number (0x%08lx)!" % magic)
chunk_size = reader.readInt()
str_count = reader.readInt()
style_offset_count = reader.readInt()
reader.readInt() # ???
str_offset = reader.readInt()
styles_offset = reader.readInt()
self._str_offsets = reader.readIntArray(str_count);
self._style_offsets = reader.readIntArray(style_offset_count);
if styles_offset == 0:
size = chunk_size - str_offset
else:
size = styles_offset - str_offset
if size % 4 != 0:
raise Exception("String data size is not multiple of 4 (%d)!" % size)
self._strings = reader.readIntArray(size / 4)
if styles_offset > 0:
size = chunk_size - styles_offset
if size % 4 != 0:
raise Exception("Style data size is not multiple of 4 (%d)!" % size)
self._styles = reader.readIntArray(size / 4)
self._str_data = [ self.getRaw(i) for i in range(self.count()) ]
def count(self):
"""Count the number of strings in the current block."""
return len(self._str_offsets)
def getRaw(self, index):
"""Provide a raw string (without any styling information) at specified index."""
if index < 0 or index >= len(self._str_offsets):
raise Exception("Invalid Index (%d)!" % index)
offset = self._str_offsets[index]
length = self.getShort(self._strings, offset)
data = ''
for i in range(length):
offset += 2
data += unichr(self.getShort(self._strings, offset))
return data
def getShort(self, array, offset):
value = array[offset / 4]
if ((offset % 4) / 2) == 0:
value &= 0xFFFF
else:
value >>= 16
return value
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