pyva/src/main/python/istring.py

   1 from functools import partial
   2
   3 # a == A, [ == {
   4 rfc_case_insensitive_map = [
   5         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,                               # 0-19
   6         20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,                     # 20-39
   7         40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,                     # 40-59
   8         60, 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,         # 60-79
   9         112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 94, 95, 96, 97, 98, 99,       # 80-99
  10         100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, # 100-119
  11         120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, # 120-139
  12         140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, # 140-159
  13         160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, # 160-179
  14         180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, # 180-199
  15         200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, # 200-219
  16         220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, # 220-239
  17         240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255                      # 240-255
  18 ]
  19
  20 """
  21 # a == A, [ != {
  22 ascii_case_insensitive_map = [
  23         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,                               # 0-19
  24         20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,                     # 20-39
  25         40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,                     # 40-59
  26         60, 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,         # 60-79
  27         112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 91, 92, 93, 94, 95, 96, 97, 98, 99,          # 80-99
  28         100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, # 100-119
  29         120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, # 120-139
  30         140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, # 140-159
  31         160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, # 160-179
  32         180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, # 180-199
  33         200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, # 200-219
  34         220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, # 220-239
  35         240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255                      # 240-255
  36 ]
  37 """
  38
  39 class istring(str):
  40         def __lt__(self, other):
  41                 for i in range(0, min(len(self), len(other))):
  42                         if rfc_case_insensitive_map[ord(self[i])] < rfc_case_insensitive_map[ord(self[i])]:
  43                                 return True
  44                 return len(self) < len(other)
  45
  46         def __le__(self, other):
  47                 return self.__lt__(other) or len(self) < len(other)
  48
  49         def __eq__(self, other):
  50                 if not other or len(self) != len(other):
  51                         return False
  52                 for i in range(0, len(self)):
  53                         if rfc_case_insensitive_map[ord(self[i])] != rfc_case_insensitive_map[ord(other[i])]:
  54                                 return False
  55                 return True
  56
  57         def __ne__(self, other):
  58                 return not self.__eq__(other)
  59
  60         def __gt__(self, other):
  61                 return not self.__le__(other)
  62
  63         def __ge__(self, other):
  64                 return not self.__lt__(other)
  65
  66         def __hash__(self):
  67                 i = 0
  68                 for c in self:
  69                         i = i ^ rfc_case_insensitive_map[ord(c)]
  70                 return i
  71
  72         def __getattribute__(self, name):
  73                 f = str.__getattribute__(self, name)
  74
  75                 if not callable(f):
  76                         return f
  77
  78                 def callback(*args, **kwargs):
  79                         r = f(*args, **kwargs)
  80                         if isinstance(r, basestring):
  81                                 return istring(r)
  82                         return r
  83
  84                 return partial(callback)
  85