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python/gdata/tlslite/utils/compat.py

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+"""Miscellaneous functions to mask Python version differences."""
+
+import sys
+import os
+
+if sys.version_info < (2,2):
+    raise AssertionError("Python 2.2 or later required")
+
+if sys.version_info < (2,3):
+
+    def enumerate(collection):
+        return zip(range(len(collection)), collection)
+
+    class Set:
+        def __init__(self, seq=None):
+            self.values = {}
+            if seq:
+                for e in seq:
+                    self.values[e] = None
+
+        def add(self, e):
+            self.values[e] = None
+
+        def discard(self, e):
+            if e in self.values.keys():
+                del(self.values[e])
+
+        def union(self, s):
+            ret = Set()
+            for e in self.values.keys():
+                ret.values[e] = None
+            for e in s.values.keys():
+                ret.values[e] = None
+            return ret
+
+        def issubset(self, other):
+            for e in self.values.keys():
+                if e not in other.values.keys():
+                    return False
+            return True
+
+        def __nonzero__( self):
+            return len(self.values.keys())
+
+        def __contains__(self, e):
+            return e in self.values.keys()
+
+        def __iter__(self):
+            return iter(set.values.keys())
+
+
+if os.name != "java":
+
+    import array
+    def createByteArraySequence(seq):
+        return array.array('B', seq)
+    def createByteArrayZeros(howMany):
+        return array.array('B', [0] * howMany)
+    def concatArrays(a1, a2):
+        return a1+a2
+
+    def bytesToString(bytes):
+        return bytes.tostring()
+    def stringToBytes(s):
+        bytes = createByteArrayZeros(0)
+        bytes.fromstring(s)
+        return bytes
+
+    import math
+    def numBits(n):
+        if n==0:
+            return 0
+        s = "%x" % n
+        return ((len(s)-1)*4) + \
+        {'0':0, '1':1, '2':2, '3':2,
+         '4':3, '5':3, '6':3, '7':3,
+         '8':4, '9':4, 'a':4, 'b':4,
+         'c':4, 'd':4, 'e':4, 'f':4,
+         }[s[0]]
+        return int(math.floor(math.log(n, 2))+1)
+
+    BaseException = Exception
+    import sys
+    import traceback
+    def formatExceptionTrace(e):
+        newStr = "".join(traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback))
+        return newStr
+
+else:
+    #Jython 2.1 is missing lots of python 2.3 stuff,
+    #which we have to emulate here:
+    #NOTE: JYTHON SUPPORT NO LONGER WORKS, DUE TO USE OF GENERATORS.
+    #THIS CODE IS LEFT IN SO THAT ONE JYTHON UPDATES TO 2.2, IT HAS A
+    #CHANCE OF WORKING AGAIN.
+
+    import java
+    import jarray
+
+    def createByteArraySequence(seq):
+        if isinstance(seq, type("")): #If it's a string, convert
+            seq = [ord(c) for c in seq]
+        return jarray.array(seq, 'h') #use short instead of bytes, cause bytes are signed
+    def createByteArrayZeros(howMany):
+        return jarray.zeros(howMany, 'h') #use short instead of bytes, cause bytes are signed
+    def concatArrays(a1, a2):
+        l = list(a1)+list(a2)
+        return createByteArraySequence(l)
+
+    #WAY TOO SLOW - MUST BE REPLACED------------
+    def bytesToString(bytes):
+        return "".join([chr(b) for b in bytes])
+
+    def stringToBytes(s):
+        bytes = createByteArrayZeros(len(s))
+        for count, c in enumerate(s):
+            bytes[count] = ord(c)
+        return bytes
+    #WAY TOO SLOW - MUST BE REPLACED------------
+
+    def numBits(n):
+        if n==0:
+            return 0
+        n= 1L * n; #convert to long, if it isn't already
+        return n.__tojava__(java.math.BigInteger).bitLength()
+
+    #Adjust the string to an array of bytes
+    def stringToJavaByteArray(s):
+        bytes = jarray.zeros(len(s), 'b')
+        for count, c in enumerate(s):
+            x = ord(c)
+            if x >= 128: x -= 256
+            bytes[count] = x
+        return bytes
+
+    BaseException = java.lang.Exception
+    import sys
+    import traceback
+    def formatExceptionTrace(e):
+        newStr = "".join(traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback))
+        return newStr