/usr/lib/python3/dist-packages/fontTools/ttLib/tables/grUtils.py is in python3-fonttools 3.21.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | import struct, warnings
try:
import lz4
except:
lz4 = None
#old scheme for VERSION < 0.9 otherwise use lz4.block
def decompress(data):
(compression,) = struct.unpack(">L", data[4:8])
scheme = compression >> 27
size = compression & 0x07ffffff
if scheme == 0:
pass
elif scheme == 1 and lz4:
res = lz4.decompress(struct.pack("<L", size) + data[8:])
if len(res) != size:
warnings.warn("Table decompression failed.")
else:
data = res
else:
warnings.warn("Table is compressed with an unsupported compression scheme")
return (data, scheme)
def compress(scheme, data):
hdr = data[:4] + struct.pack(">L", (scheme << 27) + (len(data) & 0x07ffffff))
if scheme == 0 :
return data
elif scheme == 1 and lz4:
res = lz4.compress(hdr + data)
return res
else:
warnings.warn("Table failed to compress by unsupported compression scheme")
return data
def _entries(attrs, sameval):
ak = 0
vals = []
lastv = 0
for k,v in attrs:
if len(vals) and (k != ak + 1 or (sameval and v != lastv)) :
yield (ak - len(vals) + 1, len(vals), vals)
vals = []
ak = k
vals.append(v)
lastv = v
yield (ak - len(vals) + 1, len(vals), vals)
def entries(attributes, sameval = False):
g = _entries(sorted(attributes.iteritems(), key=lambda x:int(x[0])), sameval)
return g
def bininfo(num, size=1):
if num == 0:
return struct.pack(">4H", 0, 0, 0, 0)
srange = 1;
select = 0
while srange <= num:
srange *= 2
select += 1
select -= 1
srange /= 2
srange *= size
shift = num * size - srange
return struct.pack(">4H", num, srange, select, shift)
def num2tag(n):
if n < 0x200000:
return str(n)
else:
return struct.unpack('4s', struct.pack('>L', n))[0].replace(b'\000', b'').decode()
def tag2num(n):
try:
return int(n)
except ValueError:
n = (n+" ")[:4]
return struct.unpack('>L', n.encode('ascii'))[0]
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