1"""Miscellaneous functions to mask Python version differences."""
2
3import sys
4import os
5
6if sys.version_info < (2,2):
7    raise AssertionError("Python 2.2 or later required")
8
9if sys.version_info < (2,3):
10
11    def enumerate(collection):
12        return zip(range(len(collection)), collection)
13
14    class Set:
15        def __init__(self, seq=None):
16            self.values = {}
17            if seq:
18                for e in seq:
19                    self.values[e] = None
20
21        def add(self, e):
22            self.values[e] = None
23
24        def discard(self, e):
25            if e in self.values.keys():
26                del(self.values[e])
27
28        def union(self, s):
29            ret = Set()
30            for e in self.values.keys():
31                ret.values[e] = None
32            for e in s.values.keys():
33                ret.values[e] = None
34            return ret
35
36        def issubset(self, other):
37            for e in self.values.keys():
38                if e not in other.values.keys():
39                    return False
40            return True
41
42        def __nonzero__( self):
43            return len(self.values.keys())
44
45        def __contains__(self, e):
46            return e in self.values.keys()
47
48        def __iter__(self):
49            return iter(set.values.keys())
50
51
52if os.name != "java":
53
54    import array
55    def createByteArraySequence(seq):
56        return array.array('B', seq)
57    def createByteArrayZeros(howMany):
58        return array.array('B', [0] * howMany)
59    def concatArrays(a1, a2):
60        return a1+a2
61
62    def bytesToString(bytes):
63        return bytes.tostring()
64    def stringToBytes(s):
65        bytes = createByteArrayZeros(0)
66        bytes.fromstring(s)
67        return bytes
68
69    import math
70    def numBits(n):
71        if n==0:
72            return 0
73        s = "%x" % n
74        return ((len(s)-1)*4) + \
75        {'0':0, '1':1, '2':2, '3':2,
76         '4':3, '5':3, '6':3, '7':3,
77         '8':4, '9':4, 'a':4, 'b':4,
78         'c':4, 'd':4, 'e':4, 'f':4,
79         }[s[0]]
80        return int(math.floor(math.log(n, 2))+1)
81
82    BaseException = Exception
83    import sys
84    import traceback
85    def formatExceptionTrace(e):
86        newStr = "".join(traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback))
87        return newStr
88
89else:
90    #Jython 2.1 is missing lots of python 2.3 stuff,
91    #which we have to emulate here:
92    #NOTE: JYTHON SUPPORT NO LONGER WORKS, DUE TO USE OF GENERATORS.
93    #THIS CODE IS LEFT IN SO THAT ONE JYTHON UPDATES TO 2.2, IT HAS A
94    #CHANCE OF WORKING AGAIN.
95
96    import java
97    import jarray
98
99    def createByteArraySequence(seq):
100        if isinstance(seq, type("")): #If it's a string, convert
101            seq = [ord(c) for c in seq]
102        return jarray.array(seq, 'h') #use short instead of bytes, cause bytes are signed
103    def createByteArrayZeros(howMany):
104        return jarray.zeros(howMany, 'h') #use short instead of bytes, cause bytes are signed
105    def concatArrays(a1, a2):
106        l = list(a1)+list(a2)
107        return createByteArraySequence(l)
108
109    #WAY TOO SLOW - MUST BE REPLACED------------
110    def bytesToString(bytes):
111        return "".join([chr(b) for b in bytes])
112
113    def stringToBytes(s):
114        bytes = createByteArrayZeros(len(s))
115        for count, c in enumerate(s):
116            bytes[count] = ord(c)
117        return bytes
118    #WAY TOO SLOW - MUST BE REPLACED------------
119
120    def numBits(n):
121        if n==0:
122            return 0
123        n= 1L * n; #convert to long, if it isn't already
124        return n.__tojava__(java.math.BigInteger).bitLength()
125
126    #Adjust the string to an array of bytes
127    def stringToJavaByteArray(s):
128        bytes = jarray.zeros(len(s), 'b')
129        for count, c in enumerate(s):
130            x = ord(c)
131            if x >= 128: x -= 256
132            bytes[count] = x
133        return bytes
134
135    BaseException = java.lang.Exception
136    import sys
137    import traceback
138    def formatExceptionTrace(e):
139        newStr = "".join(traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback))
140        return newStr