Cutlery/calibre
1
0
Fork 0
mirror of https://github.com/kovidgoyal/calibre.git synced 2025-07-08 18:54:09 -04:00
Code Issues Packages Projects Releases Wiki Activity

Do not pass obviously invalid data to sfntly (invalid data tends to cause sfntly to segfault)

Browse Source
This commit is contained in:
Kovid Goyal 2012-10-30 16:29:29 +05:30
parent f8d9dead20
commit c3c64c452a
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/calibre/utils/fonts/subset.py
View File

@ -20,6 +20,9 @@ def load_sfntly():
return sfntly return sfntly
def subset(font_data, individual_chars, ranges): def subset(font_data, individual_chars, ranges):
if font_data[:4] not in {b'\x00\x01\x00\x00', b'OTTO', b'true', b'typ1'}:
raise ValueError('Not a supported font file. sfnt_version not recognized: %r'%
font_data[:4])
individual = tuple(sorted(map(ord, individual_chars))) individual = tuple(sorted(map(ord, individual_chars)))
cranges = [] cranges = []
for s, e in ranges: for s, e in ranges: