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Mini Shell
Mini Shell
#!/usr/bin/env python3
__license__ = 'GPL v3'
__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
from struct import unpack_from, error
from calibre.utils.imghdr import what
def find_imgtype(data):
return what(None, data) or 'unknown'
class Container:
def __init__(self, data):
self.is_image_container = False
self.resource_index = 0
if len(data) > 60 and data[48:52] == b'EXTH':
length, num_items = unpack_from(b'>LL', data, 52)
pos = 60
while pos < 60 + length - 8:
try:
idx, size = unpack_from(b'>LL', data, pos)
except error:
break
pos += 8
size -= 8
if size < 0:
break
if idx == 539:
self.is_image_container = data[pos:pos+size] == b'application/image'
break
pos += size
def load_image(self, data):
self.resource_index += 1
if self.is_image_container:
data = data[12:]
imgtype = find_imgtype(data)
if imgtype != 'unknown':
return data, imgtype
return None, None
Zerion Mini Shell 1.0