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This commit is contained in:
Kovid Goyal 2011-07-26 20:34:42 -06:00
parent ae6f049792
commit 4bbc23d706
2 changed files with 23 additions and 8 deletions
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28
src/calibre/ebooks/mobi/debug.py
View File

@ -604,6 +604,9 @@ class IndexEntry(object): # {{{
self.raw = raw
self.tags = []
self.entry_type_raw = entry_type
self.byte_size = len(raw)
orig_raw = raw
try:
self.entry_type = self.TYPES[entry_type]
@ -641,8 +644,8 @@ class IndexEntry(object): # {{{
self.tags.append(Tag(aut_tag[0], [val], self.entry_type,
cncx))
if raw.replace(b'\x00', b''): # There can be padding null bytes
raise ValueError('Extra bytes in INDX table entry %d: %r'%(self.index, raw))
self.consumed = len(orig_raw) - len(raw)
self.trailing_bytes = raw
@property
def label(self):
@ -694,13 +697,16 @@ class IndexEntry(object): # {{{
return -1
def __str__(self):
ans = ['Index Entry(index=%s, entry_type=%s (%s), length=%d)'%(
self.index, self.entry_type, bin(self.entry_type_raw)[2:], len(self.tags))]
ans = ['Index Entry(index=%s, entry_type=%s (%s), length=%d, byte_size=%d)'%(
self.index, self.entry_type, bin(self.entry_type_raw)[2:],
len(self.tags), self.byte_size)]
for tag in self.tags:
ans.append('\t'+str(tag))
if self.first_child_index != -1:
ans.append('\tNumber of children: %d'%(self.last_child_index -
self.first_child_index + 1))
if self.trailing_bytes:
ans.append('\tTrailing bytes: %r'%self.trailing_bytes)
return '\n'.join(ans)
# }}}
@ -744,6 +750,7 @@ class IndexRecord(object): # {{{
raise ValueError('Extra bytes after IDXT table: %r'%rest)
indxt = raw[192:self.idxt_offset]
self.size_of_indxt_block = len(indxt)
self.indices = []
for i, off in enumerate(self.index_offsets):
try:
@ -756,10 +763,14 @@ class IndexRecord(object): # {{{
if index_header.index_type == 6:
flags = ord(indxt[off+consumed+d])
d += 1
pos = off+consumed+d
self.indices.append(IndexEntry(index, entry_type,
indxt[off+consumed+d:next_off], cncx,
indxt[pos:next_off], cncx,
index_header.tagx_entries, flags=flags))
index = self.indices[-1]
rest = indxt[pos+self.indices[-1].consumed:]
if rest.replace(b'\0', ''): # There can be padding null bytes
raise ValueError('Extra bytes after IDXT table: %r'%rest)
def get_parent(self, index):
if index.depth < 1:
@ -780,12 +791,13 @@ class IndexRecord(object): # {{{
u(self.unknown1)
a('Unknown (header type? index record number? always 1?): %d'%self.header_type)
u(self.unknown2)
a('IDXT Offset: %d'%self.idxt_offset)
a('IDXT Offset (%d block size): %d'%(self.size_of_indxt_block,
self.idxt_offset))
a('IDXT Count: %d'%self.idxt_count)
u(self.unknown3)
u(self.unknown4)
a('Index offsets: %r'%self.index_offsets)
a('\nIndex Entries:')
a('\nIndex Entries (%d entries):'%len(self.indices))
for entry in self.indices:
a(str(entry)+'\n')

3
src/calibre/ebooks/mobi/utils.py
View File

@ -41,6 +41,9 @@ def encode_number_as_hex(num):
number.
'''
num = bytes(hex(num)[2:].upper())
nlen = len(num)
if nlen % 2 != 0:
num = b'0'+num
ans = bytearray(num)
ans.insert(0, len(num))
return bytes(ans)