Updated by Alexander Hanel 2016-10-05

File aplib.py Modified

     dstlen = _aplib.aP_max_packed_size(srclen)

     dst = create_string_buffer(dstlen)

     wrkmem = create_string_buffer(_aplib.aP_workmem_size(srclen))

-    dstlen = _aplib.aPsafe_pack(data, dst, srclen, wrkmem, None, 0)

+    try:

+        dstlen = _aplib.aPsafe_pack(data, dst, srclen, wrkmem, None, 0)

+    except:

+        return None

     if dstlen == -1:

         return None

     compressed = buffer(dst, 0, dstlen)

Created by Alexander Hanel 2016-10-05

View revision

File aplib.py Added

+"""

+    Author: Alexander Hanel

+    Date: 2016/10/04

+    Notes: Python Script for compressing and decompressing data using aPLib. Requires

+    dll or shared libary depending on your os. Libraries can be downloaded from Ibsen

+    software - http://www.ibsensoftware.com/products_aPLib.html

+"""

+import os

+from ctypes import *

+__all__ = [ 'pack', 'pack_safe', 'depack', 'depack_safe', 'aP_depack_asm_fast', 'CB_COMPRESS']

+if os.name == 'nt':

+    CB_COMPRESS = WINFUNCTYPE(c_uint, c_uint, c_uint, c_uint, c_void_p)

+    try:

+        _aplib = windll.aplib

+    except Exception as error:

+        print error

+else:

+    CB_COMPRESS = CFUNCTYPE(c_uint, c_uint, c_uint, c_uint, c_void_p)

+    try:

+        _aplib = CDLL("libaplib.so")

+    except Exception as error:

+        print error

+def decompress(data):

+    if len(data) == 0:

+        return None

+    if "AP32" in data[:4]:

+        dstlen = _aplib.aPsafe_get_orig_size(data)

+        dst = create_string_buffer(dstlen)

+        dstlen = _aplib.aPsafe_depack(data, srclen, dst, dstlen)

+        if dstlen == -1:

+            return None

+        return buffer(dst, 0, dstlen)

+    else:

+        srclen = len(data)

+        dstlen = 50 * srclen

+        dst = create_string_buffer(dstlen)

+        try:

+            dstlen = _aplib.aP_depack_asm_fast(data, dst)

+        except:

+            return None

+        if dstlen == -1:

+            return None

+        return buffer(dst, 0, dstlen)

+def compress(data, header=True):

+    HEADER_SIZE = 24

+    srclen = len(data)

+    if srclen == 0:

+        return None

+    dstlen = _aplib.aP_max_packed_size(srclen)

+    dst = create_string_buffer(dstlen)

+    wrkmem = create_string_buffer(_aplib.aP_workmem_size(srclen))

+    dstlen = _aplib.aPsafe_pack(data, dst, srclen, wrkmem, None, 0)

+    if dstlen == -1:

+        return None

+    compressed = buffer(dst, 0, dstlen)

+    if header:

+        return compressed

+    else:

+        return compressed[HEADER_SIZE:]