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| -rw-r--r-- | source3/python/examples/tdbpack/oldtdbutil.py | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/source3/python/examples/tdbpack/oldtdbutil.py b/source3/python/examples/tdbpack/oldtdbutil.py new file mode 100644 index 0000000000..ac435b8bac --- /dev/null +++ b/source3/python/examples/tdbpack/oldtdbutil.py @@ -0,0 +1,144 @@ +#!/usr/bin/python +############################################################# +# tdbutil +# +# Purpose: +# Contains functions that are used to pack and unpack data +# from Samba's tdb databases. Samba sometimes represents complex +# data structures as a single value in a database. These functions +# allow other python scripts to package data types into a single python +# string and unpackage them. +# +# +# XXXXX: This code is no longer used; it's just here for testing +# compatibility with the new (much faster) C implementation. +# +############################################################## +import string + +def pack(format,list): + retstring = '' + listind = 0 + + # Cycle through format entries + for type in format: + # Null Terminated String + if (type == 'f' or type == 'P'): + retstring = retstring + list[listind] + "\000" + # 4 Byte Number + if (type == 'd'): + retstring = retstring + PackNum(list[listind],4) + # 2 Byte Number + if (type == 'w'): + retstring = retstring + PackNum(list[listind],2) + # Pointer Value + if (type == 'p'): + if (list[listind]): + retstring = retstring + PackNum(1,4) + else: + retstring = retstring + PackNum(0,4) + # Buffer and Length + if (type == 'B'): + # length + length = list[listind] + retstring = retstring + PackNum(length,4) + length = int(length) + listind = listind + 1 + # buffer + retstring = retstring + list[listind][:length] + + listind = listind + 1 + + return retstring + +def unpack(format,buffer): + retlist = [] + bufind = 0 + + lasttype = "" + for type in format: + # Pointer Value + if (type == 'p'): + newvalue = UnpackNum(buffer[bufind:bufind+4]) + bufind = bufind + 4 + if (newvalue): + newvalue = 1L + else: + newvalue = 0L + retlist.append(newvalue) + # Previous character till end of data + elif (type == '$'): + if (lasttype == 'f'): + while (bufind < len(buffer)): + newstring = '' + while (buffer[bufind] != '\000'): + newstring = newstring + buffer[bufind] + bufind = bufind + 1 + bufind = bufind + 1 + retlist.append(newstring) + # Null Terminated String + elif (type == 'f' or type == 'P'): + newstring = '' + while (buffer[bufind] != '\000'): + newstring = newstring + buffer[bufind] + bufind = bufind + 1 + bufind = bufind + 1 + retlist.append(newstring) + # 4 Byte Number + elif (type == 'd'): + newvalue = UnpackNum(buffer[bufind:bufind+4]) + bufind = bufind + 4 + retlist.append(newvalue) + # 2 Byte Number + elif (type == 'w'): + newvalue = UnpackNum(buffer[bufind:bufind+2]) + bufind = bufind + 2 + retlist.append(newvalue) + # Length and Buffer + elif (type == 'B'): + # Length + length = UnpackNum(buffer[bufind:bufind+4]) + bufind = bufind + 4 + retlist.append(length) + length = int(length) + # Buffer + retlist.append(buffer[bufind:bufind+length]) + bufind = bufind + length + + lasttype = type + + return ((retlist,buffer[bufind:])) + +def PackNum(myint,size): + retstring = '' + size = size * 2 + hint = hex(myint)[2:] + + # Check for long notation + if (hint[-1:] == 'L'): + hint = hint[:-1] + + addon = size - len(hint) + for i in range(0,addon): + hint = '0' + hint + + while (size > 0): + val = string.atoi(hint[size-2:size],16) + retstring = retstring + chr(val) + size = size - 2 + + return retstring + +def UnpackNum(buffer): + size = len(buffer) + mystring = '' + + for i in range(size-1,-1,-1): + val = hex(ord(buffer[i]))[2:] + if (len(val) == 1): + val = '0' + val + mystring = mystring + val + if (len(mystring) > 4): + return string.atol(mystring,16) + else: + return string.atoi(mystring,16) |