admin/you0708-lznt1
1
0
Fork 0
mirror of https://github.com/you0708/lznt1 synced 2026-06-08 18:32:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

Python3 support

Browse Source
This commit is contained in:
You Nakatsuru
2020-03-17 00:50:31 +09:00
parent d064429159
commit 8ac366bb34
3 changed files with 22 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
README.md
+10 -10
View File
@@ -18,16 +18,16 @@ pip install lznt1
## Test ## Test
``` ```
C:\Users\you\Desktop\ln>python test.py lznt1.py C:\Users\you\Desktop>python test.py lznt1.py
[*] input size = 4067 bytes, sha1 hash = 9887522d4088152ca434a5f275adcd99c2de338d [*] input size = 4034 bytes, sha1 hash = e19250d48c1e46d7d0fa46a5d345487d723559cd
[*] size of compressed1: 1280 [*] size of compressed1: 1264
[*] size of compressed2: 1553 [*] size of compressed2: 1559
[*] sha1 hash of compressed1: 64b9b5f92274e60d10f3ef0e517f563cc8d46bd6 [*] sha1 hash of compressed1: 720bd5775ee3273deaebabb29a412ea079fa79ae
[*] sha1 hash of compressed2: 92e737ee1d2b468800169cc7b28854b392ac8395 [*] sha1 hash of compressed2: 8df2fe59dba7fa4d4d01a8f12f05d7b5799238cc
[*] sha1 hash of decompressed11: 9887522d4088152ca434a5f275adcd99c2de338d [*] sha1 hash of decompressed11: e19250d48c1e46d7d0fa46a5d345487d723559cd
[*] sha1 hash of decompressed12: 9887522d4088152ca434a5f275adcd99c2de338d [*] sha1 hash of decompressed12: e19250d48c1e46d7d0fa46a5d345487d723559cd
[*] sha1 hash of decompressed21: 9887522d4088152ca434a5f275adcd99c2de338d [*] sha1 hash of decompressed21: e19250d48c1e46d7d0fa46a5d345487d723559cd
[*] sha1 hash of decompressed22: 9887522d4088152ca434a5f275adcd99c2de338d [*] sha1 hash of decompressed22: e19250d48c1e46d7d0fa46a5d345487d723559cd
``` ```
## References ## References
lznt1.py
+11 -10
View File
@@ -3,13 +3,13 @@ import sys
import copy import copy
def _decompress_chunk(chunk): def _decompress_chunk(chunk):
out = '' out = bytes()
while chunk: while chunk:
flags = ord(chunk[0]) flags = ord(chunk[0:1])
chunk = chunk[1:] chunk = chunk[1:]
for i in range(8): for i in range(8):
if not (flags >> i & 1): if not (flags >> i & 1):
out += chunk[0] out += chunk[0:1]
chunk = chunk[1:] chunk = chunk[1:]
else: else:
flag = struct.unpack('<H', chunk[:2])[0] flag = struct.unpack('<H', chunk[:2])[0]
@@ -25,7 +25,7 @@ def _decompress_chunk(chunk):
offset = (flag >> o_shift) + 1 offset = (flag >> o_shift) + 1
if length >= offset: if length >= offset:
tmp = out[-offset:] * (0xFFF / len(out[-offset:]) + 1) tmp = out[-offset:] * int(0xFFF / len(out[-offset:]) + 1)
out += tmp[:length] out += tmp[:length]
else: else:
out += out[-offset:-offset+length] out += out[-offset:-offset+length]
@@ -35,7 +35,7 @@ def _decompress_chunk(chunk):
return out return out
def decompress(buf, length_check=True): def decompress(buf, length_check=True):
out = '' out = bytes()
while buf: while buf:
header = struct.unpack('<H', buf[:2])[0] header = struct.unpack('<H', buf[:2])[0]
length = (header & 0xFFF) + 1 length = (header & 0xFFF) + 1
@@ -48,6 +48,7 @@ def decompress(buf, length_check=True):
else: else:
out += chunk out += chunk
buf = buf[2+length:] buf = buf[2+length:]
return out return out
def _find(src, target, max_len): def _find(src, target, max_len):
@@ -60,7 +61,7 @@ def _find(src, target, max_len):
tmp_offset = len(src) - offset tmp_offset = len(src) - offset
tmp_length = i tmp_length = i
if tmp_offset == tmp_length: if tmp_offset == tmp_length:
tmp = src[offset:] * (0xFFF / len(src[offset:]) + 1) tmp = src[offset:] * int(0xFFF / len(src[offset:]) + 1)
for j in range(i, max_len+1): for j in range(i, max_len+1):
offset = tmp.rfind(target[:j]) offset = tmp.rfind(target[:j])
if offset == -1: if offset == -1:
@@ -76,13 +77,13 @@ def _find(src, target, max_len):
def _compress_chunk(chunk): def _compress_chunk(chunk):
blob = copy.copy(chunk) blob = copy.copy(chunk)
out = '' out = bytes()
pow2 = 0x10 pow2 = 0x10
l_mask3 = 0x1002 l_mask3 = 0x1002
o_shift = 12 o_shift = 12
while len(blob) > 0: while len(blob) > 0:
bits = 0 bits = 0
tmp = '' tmp = bytes()
for i in range(8): for i in range(8):
bits >>= 1 bits >>= 1
while pow2 < (len(chunk) - len(blob)): while pow2 < (len(chunk) - len(blob)):
@@ -107,7 +108,7 @@ def _compress_chunk(chunk):
bits |= 0x80 # set the highest bit bits |= 0x80 # set the highest bit
blob = blob[length:] blob = blob[length:]
else: else:
tmp += blob[0] tmp += blob[0:1]
blob = blob[1:] blob = blob[1:]
if len(blob) == 0: if len(blob) == 0:
break break
@@ -118,7 +119,7 @@ def _compress_chunk(chunk):
return out return out
def compress(buf, chunk_size=0x1000): def compress(buf, chunk_size=0x1000):
out = '' out = bytes()
while buf: while buf:
chunk = buf[:chunk_size] chunk = buf[:chunk_size]
compressed = _compress_chunk(chunk) compressed = _compress_chunk(chunk)
setup.py
+1 -1
View File
@@ -3,7 +3,7 @@ from setuptools import setup
setup( setup(
name="lznt1", name="lznt1",
version="0.1.2", version="0.2",
author="You Nakatsuru", author="You Nakatsuru",
author_email="you0708@users.noreply.github.com", author_email="you0708@users.noreply.github.com",
license="Apache License 2.0", license="Apache License 2.0",