Lib/regexp.py

   1 # Provide backward compatibility for module "regexp" using "regex".
   2
   3 import regex
   4 from regex_syntax import *
   5
   6 class Prog:
   7         def __init__(self, pat):
   8                 save_syntax = regex.set_syntax(RE_SYNTAX_AWK)
   9                 try:
  10                         self.prog = regex.compile(pat)
  11                 finally:
  12                         xxx = regex.set_syntax(save_syntax)
  13         def match(self, *args):
  14                 if len(args) == 2:
  15                         str, offset = args
  16                 elif len(args) == 1:
  17                         str, offset = args[0], 0
  18                 else:
  19                         raise TypeError, 'wrong argument count'
  20                 if self.prog.search(str, offset) < 0:
  21                         return ()
  22                 regs = self.prog.regs
  23                 i = len(regs)
  24                 while i > 0 and regs[i-1] == (-1, -1):
  25                         i = i-1
  26                 return regs[:i]
  27
  28 def compile(pat):
  29         return Prog(pat)
  30
  31 cache_pat = None
  32 cache_prog = None
  33
  34 def match(pat, str):
  35         global cache_pat, cache_prog
  36         if pat <> cache_pat:
  37                 cache_pat, cache_prog = pat, compile(pat)
  38         return cache_prog.match(str)