mirror of
https://github.com/python/cpython.git
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- pedantic: make sure "python -t" doesn't complain...
This commit is contained in:
Fredrik Lundh
parent
df02d0b3f0
commit
90a0791322
22
Lib/sre.py
22
Lib/sre.py
@ -98,7 +98,7 @@ def _subn(pattern, template, string, count=0):
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if callable(template):
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filter = template
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else:
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template = sre_parse.parse_template(template, pattern)
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template = sre_parse.parse_template(template, pattern)
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def filter(match, template=template):
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return sre_parse.expand_template(template, match)
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n = i = 0
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@ -109,11 +109,11 @@ def _subn(pattern, template, string, count=0):
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m = c.search()
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if not m:
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break
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b, e = m.span()
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b, e = m.span()
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if i < b:
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append(string[i:b])
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append(filter(m))
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i = e
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i = e
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n = n + 1
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append(string[i:])
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return string[:0].join(s), n
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@ -130,15 +130,15 @@ def _split(pattern, string, maxsplit=0):
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m = c.search()
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if not m:
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break
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b, e = m.span()
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if b == e:
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if i >= len(string):
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break
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continue
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b, e = m.span()
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if b == e:
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if i >= len(string):
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break
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continue
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append(string[i:b])
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if g and b != e:
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extend(m.groups())
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i = e
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if g and b != e:
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extend(m.groups())
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i = e
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n = n + 1
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append(string[i:])
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return s
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@ -18,7 +18,7 @@ from sre_constants import *
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# find an array type code that matches the engine's code size
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for WORDSIZE in "BHil":
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if len(array.array(WORDSIZE, [0]).tostring()) == _sre.getcodesize():
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break
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break
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else:
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raise RuntimeError, "cannot find a useable array type"
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@ -26,132 +26,132 @@ def _compile(code, pattern, flags):
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# internal: compile a (sub)pattern
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emit = code.append
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for op, av in pattern:
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if op is ANY:
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if flags & SRE_FLAG_DOTALL:
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emit(OPCODES[op])
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else:
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emit(OPCODES[CATEGORY])
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emit(CHCODES[CATEGORY_NOT_LINEBREAK])
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elif op in (SUCCESS, FAILURE):
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emit(OPCODES[op])
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elif op is AT:
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emit(OPCODES[op])
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if flags & SRE_FLAG_MULTILINE:
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emit(ATCODES[AT_MULTILINE[av]])
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else:
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emit(ATCODES[av])
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elif op is BRANCH:
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emit(OPCODES[op])
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tail = []
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for av in av[1]:
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skip = len(code); emit(0)
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_compile(code, av, flags)
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emit(OPCODES[JUMP])
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tail.append(len(code)); emit(0)
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code[skip] = len(code) - skip
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emit(0) # end of branch
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for tail in tail:
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code[tail] = len(code) - tail
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elif op is CALL:
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emit(OPCODES[op])
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skip = len(code); emit(0)
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_compile(code, av, flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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elif op is CATEGORY:
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emit(OPCODES[op])
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if flags & SRE_FLAG_LOCALE:
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emit(CHCODES[CH_LOCALE[av]])
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elif flags & SRE_FLAG_UNICODE:
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emit(CHCODES[CH_UNICODE[av]])
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else:
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emit(CHCODES[av])
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elif op is GROUP:
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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else:
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emit(OPCODES[op])
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emit(av-1)
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elif op is IN:
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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def fixup(literal, flags=flags):
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return _sre.getlower(ord(literal), flags)
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else:
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emit(OPCODES[op])
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fixup = ord
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skip = len(code); emit(0)
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for op, av in av:
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emit(OPCODES[op])
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if op is NEGATE:
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pass
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elif op is LITERAL:
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emit(fixup(av))
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elif op is RANGE:
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emit(fixup(av[0]))
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emit(fixup(av[1]))
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elif op is CATEGORY:
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if flags & SRE_FLAG_LOCALE:
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emit(CHCODES[CH_LOCALE[av]])
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elif flags & SRE_FLAG_UNICODE:
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emit(CHCODES[CH_UNICODE[av]])
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else:
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emit(CHCODES[av])
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else:
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raise error, "internal: unsupported set operator"
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emit(OPCODES[FAILURE])
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code[skip] = len(code) - skip
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elif op in (LITERAL, NOT_LITERAL):
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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else:
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emit(OPCODES[op])
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emit(ord(av))
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elif op is MARK:
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emit(OPCODES[op])
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emit(av)
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elif op in (REPEAT, MIN_REPEAT, MAX_REPEAT):
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if flags & SRE_FLAG_TEMPLATE:
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emit(OPCODES[REPEAT])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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else:
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lo, hi = av[2].getwidth()
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if lo == 0:
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raise error, "nothing to repeat"
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if 0 and lo == hi == 1 and op is MAX_REPEAT:
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# FIXME: <fl> need a better way to figure out when
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# it's safe to use this one (in the parser, probably)
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emit(OPCODES[MAX_REPEAT_ONE])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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else:
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emit(OPCODES[op])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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elif op is SUBPATTERN:
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group = av[0]
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if group:
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emit(OPCODES[MARK])
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emit((group-1)*2)
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_compile(code, av[1], flags)
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if group:
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emit(OPCODES[MARK])
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emit((group-1)*2+1)
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else:
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raise ValueError, ("unsupported operand type", op)
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if op is ANY:
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if flags & SRE_FLAG_DOTALL:
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emit(OPCODES[op])
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else:
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emit(OPCODES[CATEGORY])
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emit(CHCODES[CATEGORY_NOT_LINEBREAK])
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elif op in (SUCCESS, FAILURE):
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emit(OPCODES[op])
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elif op is AT:
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emit(OPCODES[op])
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if flags & SRE_FLAG_MULTILINE:
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emit(ATCODES[AT_MULTILINE[av]])
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else:
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emit(ATCODES[av])
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elif op is BRANCH:
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emit(OPCODES[op])
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tail = []
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for av in av[1]:
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skip = len(code); emit(0)
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_compile(code, av, flags)
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emit(OPCODES[JUMP])
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tail.append(len(code)); emit(0)
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code[skip] = len(code) - skip
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emit(0) # end of branch
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for tail in tail:
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code[tail] = len(code) - tail
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elif op is CALL:
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emit(OPCODES[op])
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skip = len(code); emit(0)
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_compile(code, av, flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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elif op is CATEGORY:
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emit(OPCODES[op])
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if flags & SRE_FLAG_LOCALE:
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emit(CHCODES[CH_LOCALE[av]])
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elif flags & SRE_FLAG_UNICODE:
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emit(CHCODES[CH_UNICODE[av]])
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else:
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emit(CHCODES[av])
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elif op is GROUP:
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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else:
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emit(OPCODES[op])
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emit(av-1)
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elif op is IN:
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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def fixup(literal, flags=flags):
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return _sre.getlower(ord(literal), flags)
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else:
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emit(OPCODES[op])
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fixup = ord
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skip = len(code); emit(0)
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for op, av in av:
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emit(OPCODES[op])
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if op is NEGATE:
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pass
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elif op is LITERAL:
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emit(fixup(av))
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elif op is RANGE:
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emit(fixup(av[0]))
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emit(fixup(av[1]))
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elif op is CATEGORY:
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if flags & SRE_FLAG_LOCALE:
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emit(CHCODES[CH_LOCALE[av]])
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elif flags & SRE_FLAG_UNICODE:
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emit(CHCODES[CH_UNICODE[av]])
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else:
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emit(CHCODES[av])
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else:
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raise error, "internal: unsupported set operator"
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emit(OPCODES[FAILURE])
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code[skip] = len(code) - skip
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elif op in (LITERAL, NOT_LITERAL):
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if flags & SRE_FLAG_IGNORECASE:
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emit(OPCODES[OP_IGNORE[op]])
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else:
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emit(OPCODES[op])
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emit(ord(av))
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elif op is MARK:
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emit(OPCODES[op])
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emit(av)
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elif op in (REPEAT, MIN_REPEAT, MAX_REPEAT):
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if flags & SRE_FLAG_TEMPLATE:
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emit(OPCODES[REPEAT])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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else:
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lo, hi = av[2].getwidth()
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if lo == 0:
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raise error, "nothing to repeat"
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if 0 and lo == hi == 1 and op is MAX_REPEAT:
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# FIXME: <fl> need a better way to figure out when
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# it's safe to use this one (in the parser, probably)
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emit(OPCODES[MAX_REPEAT_ONE])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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else:
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emit(OPCODES[op])
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skip = len(code); emit(0)
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emit(av[0])
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emit(av[1])
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_compile(code, av[2], flags)
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emit(OPCODES[SUCCESS])
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code[skip] = len(code) - skip
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elif op is SUBPATTERN:
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group = av[0]
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if group:
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emit(OPCODES[MARK])
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emit((group-1)*2)
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_compile(code, av[1], flags)
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if group:
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emit(OPCODES[MARK])
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emit((group-1)*2+1)
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else:
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raise ValueError, ("unsupported operand type", op)
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def _compile_info(code, pattern, flags):
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# internal: compile an info block. in the current version,
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@ -159,15 +159,15 @@ def _compile_info(code, pattern, flags):
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# if any
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lo, hi = pattern.getwidth()
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if lo == 0:
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return # not worth it
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return # not worth it
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# look for a literal prefix
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prefix = []
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if not (flags & SRE_FLAG_IGNORECASE):
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for op, av in pattern.data:
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if op is LITERAL:
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prefix.append(ord(av))
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else:
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break
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for op, av in pattern.data:
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if op is LITERAL:
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prefix.append(ord(av))
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else:
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break
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# add an info block
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emit = code.append
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emit(OPCODES[INFO])
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@ -175,25 +175,25 @@ def _compile_info(code, pattern, flags):
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# literal flag
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mask = 0
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if len(prefix) == len(pattern.data):
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mask = 1
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mask = 1
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emit(mask)
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# pattern length
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emit(lo)
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if hi < 32768:
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emit(hi)
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emit(hi)
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else:
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emit(0)
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emit(0)
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# add literal prefix
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emit(len(prefix))
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if prefix:
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code.extend(prefix)
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# generate overlap table
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table = [-1] + ([0]*len(prefix))
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for i in range(len(prefix)):
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table[i+1] = table[i]+1
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while table[i+1] > 0 and prefix[i] != prefix[table[i+1]-1]:
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table[i+1] = table[table[i+1]-1]+1
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code.extend(table[1:]) # don't store first entry
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code.extend(prefix)
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# generate overlap table
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table = [-1] + ([0]*len(prefix))
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for i in range(len(prefix)):
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table[i+1] = table[i]+1
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while table[i+1] > 0 and prefix[i] != prefix[table[i+1]-1]:
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table[i+1] = table[table[i+1]-1]+1
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code.extend(table[1:]) # don't store first entry
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code[skip] = len(code) - skip
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def compile(p, flags=0):
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@ -201,11 +201,11 @@ def compile(p, flags=0):
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# compile, as necessary
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if type(p) in (type(""), type(u"")):
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import sre_parse
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pattern = p
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p = sre_parse.parse(p)
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import sre_parse
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pattern = p
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p = sre_parse.parse(p)
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else:
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pattern = None
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pattern = None
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flags = p.pattern.flags | flags
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code = []
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@ -220,10 +220,10 @@ def compile(p, flags=0):
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# FIXME: <fl> get rid of this limitation!
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assert p.pattern.groups <= 100,\
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"sorry, but this version only supports 100 named groups"
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"sorry, but this version only supports 100 named groups"
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return _sre.compile(
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pattern, flags,
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array.array(WORDSIZE, code).tostring(),
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p.pattern.groups-1, p.pattern.groupdict
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)
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pattern, flags,
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array.array(WORDSIZE, code).tostring(),
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p.pattern.groups-1, p.pattern.groupdict
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)
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814
Lib/sre_parse.py
814
Lib/sre_parse.py
@ -67,106 +67,106 @@ FLAGS = {
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class State:
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def __init__(self):
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self.flags = 0
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self.groups = 1
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self.groupdict = {}
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self.flags = 0
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self.groups = 1
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self.groupdict = {}
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def getgroup(self, name=None):
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gid = self.groups
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self.groups = gid + 1
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if name:
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self.groupdict[name] = gid
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return gid
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gid = self.groups
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self.groups = gid + 1
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if name:
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self.groupdict[name] = gid
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return gid
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class SubPattern:
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# a subpattern, in intermediate form
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def __init__(self, pattern, data=None):
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self.pattern = pattern
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if not data:
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data = []
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self.data = data
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self.width = None
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self.pattern = pattern
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if not data:
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data = []
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self.data = data
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self.width = None
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def __repr__(self):
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return repr(self.data)
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return repr(self.data)
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def __len__(self):
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return len(self.data)
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return len(self.data)
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def __delitem__(self, index):
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del self.data[index]
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del self.data[index]
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def __getitem__(self, index):
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return self.data[index]
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return self.data[index]
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def __setitem__(self, index, code):
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self.data[index] = code
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self.data[index] = code
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def __getslice__(self, start, stop):
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return SubPattern(self.pattern, self.data[start:stop])
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return SubPattern(self.pattern, self.data[start:stop])
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def insert(self, index, code):
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self.data.insert(index, code)
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self.data.insert(index, code)
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def append(self, code):
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self.data.append(code)
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self.data.append(code)
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def getwidth(self):
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# determine the width (min, max) for this subpattern
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||||
if self.width:
|
||||
return self.width
|
||||
lo = hi = 0L
|
||||
for op, av in self.data:
|
||||
if op is BRANCH:
|
||||
l = sys.maxint
|
||||
h = 0
|
||||
for av in av[1]:
|
||||
i, j = av.getwidth()
|
||||
l = min(l, i)
|
||||
h = min(h, j)
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op is CALL:
|
||||
i, j = av.getwidth()
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op is SUBPATTERN:
|
||||
i, j = av[1].getwidth()
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op in (MIN_REPEAT, MAX_REPEAT):
|
||||
i, j = av[2].getwidth()
|
||||
lo = lo + long(i) * av[0]
|
||||
hi = hi + long(j) * av[1]
|
||||
elif op in (ANY, RANGE, IN, LITERAL, NOT_LITERAL, CATEGORY):
|
||||
lo = lo + 1
|
||||
hi = hi + 1
|
||||
elif op == SUCCESS:
|
||||
break
|
||||
self.width = int(min(lo, sys.maxint)), int(min(hi, sys.maxint))
|
||||
return self.width
|
||||
# determine the width (min, max) for this subpattern
|
||||
if self.width:
|
||||
return self.width
|
||||
lo = hi = 0L
|
||||
for op, av in self.data:
|
||||
if op is BRANCH:
|
||||
l = sys.maxint
|
||||
h = 0
|
||||
for av in av[1]:
|
||||
i, j = av.getwidth()
|
||||
l = min(l, i)
|
||||
h = min(h, j)
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op is CALL:
|
||||
i, j = av.getwidth()
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op is SUBPATTERN:
|
||||
i, j = av[1].getwidth()
|
||||
lo = lo + i
|
||||
hi = hi + j
|
||||
elif op in (MIN_REPEAT, MAX_REPEAT):
|
||||
i, j = av[2].getwidth()
|
||||
lo = lo + long(i) * av[0]
|
||||
hi = hi + long(j) * av[1]
|
||||
elif op in (ANY, RANGE, IN, LITERAL, NOT_LITERAL, CATEGORY):
|
||||
lo = lo + 1
|
||||
hi = hi + 1
|
||||
elif op == SUCCESS:
|
||||
break
|
||||
self.width = int(min(lo, sys.maxint)), int(min(hi, sys.maxint))
|
||||
return self.width
|
||||
|
||||
class Tokenizer:
|
||||
def __init__(self, string):
|
||||
self.index = 0
|
||||
self.string = string
|
||||
self.next = self.__next()
|
||||
self.index = 0
|
||||
self.string = string
|
||||
self.next = self.__next()
|
||||
def __next(self):
|
||||
if self.index >= len(self.string):
|
||||
return None
|
||||
char = self.string[self.index]
|
||||
if char[0] == "\\":
|
||||
try:
|
||||
c = self.string[self.index + 1]
|
||||
except IndexError:
|
||||
raise error, "bogus escape"
|
||||
char = char + c
|
||||
self.index = self.index + len(char)
|
||||
return char
|
||||
if self.index >= len(self.string):
|
||||
return None
|
||||
char = self.string[self.index]
|
||||
if char[0] == "\\":
|
||||
try:
|
||||
c = self.string[self.index + 1]
|
||||
except IndexError:
|
||||
raise error, "bogus escape"
|
||||
char = char + c
|
||||
self.index = self.index + len(char)
|
||||
return char
|
||||
def match(self, char):
|
||||
if char == self.next:
|
||||
self.next = self.__next()
|
||||
return 1
|
||||
return 0
|
||||
if char == self.next:
|
||||
self.next = self.__next()
|
||||
return 1
|
||||
return 0
|
||||
def match_set(self, set):
|
||||
if self.next and self.next in set:
|
||||
self.next = self.__next()
|
||||
return 1
|
||||
return 0
|
||||
if self.next and self.next in set:
|
||||
self.next = self.__next()
|
||||
return 1
|
||||
return 0
|
||||
def get(self):
|
||||
this = self.next
|
||||
self.next = self.__next()
|
||||
return this
|
||||
this = self.next
|
||||
self.next = self.__next()
|
||||
return this
|
||||
|
||||
def isident(char):
|
||||
return "a" <= char <= "z" or "A" <= char <= "Z" or char == "_"
|
||||
@ -180,83 +180,83 @@ def isname(name):
|
||||
# expression instead, but I seem to have certain bootstrapping
|
||||
# problems here ;-)
|
||||
if not isident(name[0]):
|
||||
return 0
|
||||
return 0
|
||||
for char in name:
|
||||
if not isident(char) and not isdigit(char):
|
||||
return 0
|
||||
if not isident(char) and not isdigit(char):
|
||||
return 0
|
||||
return 1
|
||||
|
||||
def _group(escape, groups):
|
||||
# check if the escape string represents a valid group
|
||||
try:
|
||||
group = int(escape[1:])
|
||||
if group and group < groups:
|
||||
return group
|
||||
group = int(escape[1:])
|
||||
if group and group < groups:
|
||||
return group
|
||||
except ValueError:
|
||||
pass
|
||||
pass
|
||||
return None # not a valid group
|
||||
|
||||
def _class_escape(source, escape):
|
||||
# handle escape code inside character class
|
||||
code = ESCAPES.get(escape)
|
||||
if code:
|
||||
return code
|
||||
return code
|
||||
code = CATEGORIES.get(escape)
|
||||
if code:
|
||||
return code
|
||||
return code
|
||||
try:
|
||||
if escape[1:2] == "x":
|
||||
while source.next in HEXDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[2:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-4:], 16) & 0xff)
|
||||
elif str(escape[1:2]) in OCTDIGITS:
|
||||
while source.next in OCTDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[1:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-6:], 8) & 0xff)
|
||||
if len(escape) == 2:
|
||||
return LITERAL, escape[1]
|
||||
if escape[1:2] == "x":
|
||||
while source.next in HEXDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[2:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-4:], 16) & 0xff)
|
||||
elif str(escape[1:2]) in OCTDIGITS:
|
||||
while source.next in OCTDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[1:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-6:], 8) & 0xff)
|
||||
if len(escape) == 2:
|
||||
return LITERAL, escape[1]
|
||||
except ValueError:
|
||||
pass
|
||||
pass
|
||||
raise error, "bogus escape: %s" % repr(escape)
|
||||
|
||||
def _escape(source, escape, state):
|
||||
# handle escape code in expression
|
||||
code = CATEGORIES.get(escape)
|
||||
if code:
|
||||
return code
|
||||
return code
|
||||
code = ESCAPES.get(escape)
|
||||
if code:
|
||||
return code
|
||||
return code
|
||||
try:
|
||||
if escape[1:2] == "x":
|
||||
while source.next in HEXDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[2:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-4:], 16) & 0xff)
|
||||
elif escape[1:2] in DIGITS:
|
||||
while 1:
|
||||
group = _group(escape, state.groups)
|
||||
if group:
|
||||
if (not source.next or
|
||||
not _group(escape + source.next, state.groups)):
|
||||
return GROUP, group
|
||||
escape = escape + source.get()
|
||||
elif source.next in OCTDIGITS:
|
||||
escape = escape + source.get()
|
||||
else:
|
||||
break
|
||||
escape = escape[1:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-6:], 8) & 0xff)
|
||||
if len(escape) == 2:
|
||||
return LITERAL, escape[1]
|
||||
if escape[1:2] == "x":
|
||||
while source.next in HEXDIGITS:
|
||||
escape = escape + source.get()
|
||||
escape = escape[2:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-4:], 16) & 0xff)
|
||||
elif escape[1:2] in DIGITS:
|
||||
while 1:
|
||||
group = _group(escape, state.groups)
|
||||
if group:
|
||||
if (not source.next or
|
||||
not _group(escape + source.next, state.groups)):
|
||||
return GROUP, group
|
||||
escape = escape + source.get()
|
||||
elif source.next in OCTDIGITS:
|
||||
escape = escape + source.get()
|
||||
else:
|
||||
break
|
||||
escape = escape[1:]
|
||||
# FIXME: support unicode characters!
|
||||
return LITERAL, chr(int(escape[-6:], 8) & 0xff)
|
||||
if len(escape) == 2:
|
||||
return LITERAL, escape[1]
|
||||
except ValueError:
|
||||
pass
|
||||
pass
|
||||
raise error, "bogus escape: %s" % repr(escape)
|
||||
|
||||
|
||||
@ -268,35 +268,35 @@ def _branch(pattern, items):
|
||||
|
||||
# check if all items share a common prefix
|
||||
while 1:
|
||||
prefix = None
|
||||
for item in items:
|
||||
if not item:
|
||||
break
|
||||
if prefix is None:
|
||||
prefix = item[0]
|
||||
elif item[0] != prefix:
|
||||
break
|
||||
else:
|
||||
# all subitems start with a common "prefix".
|
||||
# move it out of the branch
|
||||
for item in items:
|
||||
del item[0]
|
||||
subpattern.append(prefix)
|
||||
continue # check next one
|
||||
break
|
||||
prefix = None
|
||||
for item in items:
|
||||
if not item:
|
||||
break
|
||||
if prefix is None:
|
||||
prefix = item[0]
|
||||
elif item[0] != prefix:
|
||||
break
|
||||
else:
|
||||
# all subitems start with a common "prefix".
|
||||
# move it out of the branch
|
||||
for item in items:
|
||||
del item[0]
|
||||
subpattern.append(prefix)
|
||||
continue # check next one
|
||||
break
|
||||
|
||||
# check if the branch can be replaced by a character set
|
||||
for item in items:
|
||||
if len(item) != 1 or item[0][0] != LITERAL:
|
||||
break
|
||||
if len(item) != 1 or item[0][0] != LITERAL:
|
||||
break
|
||||
else:
|
||||
# we can store this as a character set instead of a
|
||||
# branch (FIXME: use a range if possible)
|
||||
set = []
|
||||
for item in items:
|
||||
set.append(item[0])
|
||||
subpattern.append((IN, set))
|
||||
return subpattern
|
||||
# we can store this as a character set instead of a
|
||||
# branch (FIXME: use a range if possible)
|
||||
set = []
|
||||
for item in items:
|
||||
set.append(item[0])
|
||||
subpattern.append((IN, set))
|
||||
return subpattern
|
||||
|
||||
subpattern.append((BRANCH, (None, items)))
|
||||
return subpattern
|
||||
@ -309,197 +309,197 @@ def _parse(source, state, flags=0):
|
||||
|
||||
while 1:
|
||||
|
||||
if source.next in ("|", ")"):
|
||||
break # end of subpattern
|
||||
this = source.get()
|
||||
if this is None:
|
||||
break # end of pattern
|
||||
if source.next in ("|", ")"):
|
||||
break # end of subpattern
|
||||
this = source.get()
|
||||
if this is None:
|
||||
break # end of pattern
|
||||
|
||||
if state.flags & SRE_FLAG_VERBOSE:
|
||||
# skip whitespace and comments
|
||||
if this in WHITESPACE:
|
||||
continue
|
||||
if this == "#":
|
||||
while 1:
|
||||
this = source.get()
|
||||
if this in (None, "\n"):
|
||||
break
|
||||
continue
|
||||
if state.flags & SRE_FLAG_VERBOSE:
|
||||
# skip whitespace and comments
|
||||
if this in WHITESPACE:
|
||||
continue
|
||||
if this == "#":
|
||||
while 1:
|
||||
this = source.get()
|
||||
if this in (None, "\n"):
|
||||
break
|
||||
continue
|
||||
|
||||
if this and this[0] not in SPECIAL_CHARS:
|
||||
subpattern.append((LITERAL, this))
|
||||
if this and this[0] not in SPECIAL_CHARS:
|
||||
subpattern.append((LITERAL, this))
|
||||
|
||||
elif this == "[":
|
||||
# character set
|
||||
set = []
|
||||
## if source.match(":"):
|
||||
## pass # handle character classes
|
||||
if source.match("^"):
|
||||
set.append((NEGATE, None))
|
||||
# check remaining characters
|
||||
start = set[:]
|
||||
while 1:
|
||||
this = source.get()
|
||||
if this == "]" and set != start:
|
||||
break
|
||||
elif this and this[0] == "\\":
|
||||
code1 = _class_escape(source, this)
|
||||
elif this:
|
||||
code1 = LITERAL, this
|
||||
else:
|
||||
raise error, "unexpected end of regular expression"
|
||||
if source.match("-"):
|
||||
# potential range
|
||||
this = source.get()
|
||||
if this == "]":
|
||||
set.append(code1)
|
||||
set.append((LITERAL, "-"))
|
||||
break
|
||||
else:
|
||||
if this[0] == "\\":
|
||||
code2 = _class_escape(source, this)
|
||||
else:
|
||||
code2 = LITERAL, this
|
||||
if code1[0] != LITERAL or code2[0] != LITERAL:
|
||||
raise error, "illegal range"
|
||||
if len(code1[1]) != 1 or len(code2[1]) != 1:
|
||||
raise error, "illegal range"
|
||||
set.append((RANGE, (code1[1], code2[1])))
|
||||
else:
|
||||
if code1[0] is IN:
|
||||
code1 = code1[1][0]
|
||||
set.append(code1)
|
||||
elif this == "[":
|
||||
# character set
|
||||
set = []
|
||||
## if source.match(":"):
|
||||
## pass # handle character classes
|
||||
if source.match("^"):
|
||||
set.append((NEGATE, None))
|
||||
# check remaining characters
|
||||
start = set[:]
|
||||
while 1:
|
||||
this = source.get()
|
||||
if this == "]" and set != start:
|
||||
break
|
||||
elif this and this[0] == "\\":
|
||||
code1 = _class_escape(source, this)
|
||||
elif this:
|
||||
code1 = LITERAL, this
|
||||
else:
|
||||
raise error, "unexpected end of regular expression"
|
||||
if source.match("-"):
|
||||
# potential range
|
||||
this = source.get()
|
||||
if this == "]":
|
||||
set.append(code1)
|
||||
set.append((LITERAL, "-"))
|
||||
break
|
||||
else:
|
||||
if this[0] == "\\":
|
||||
code2 = _class_escape(source, this)
|
||||
else:
|
||||
code2 = LITERAL, this
|
||||
if code1[0] != LITERAL or code2[0] != LITERAL:
|
||||
raise error, "illegal range"
|
||||
if len(code1[1]) != 1 or len(code2[1]) != 1:
|
||||
raise error, "illegal range"
|
||||
set.append((RANGE, (code1[1], code2[1])))
|
||||
else:
|
||||
if code1[0] is IN:
|
||||
code1 = code1[1][0]
|
||||
set.append(code1)
|
||||
|
||||
# FIXME: <fl> move set optimization to compiler!
|
||||
if len(set)==1 and set[0][0] is LITERAL:
|
||||
subpattern.append(set[0]) # optimization
|
||||
elif len(set)==2 and set[0][0] is NEGATE and set[1][0] is LITERAL:
|
||||
subpattern.append((NOT_LITERAL, set[1][1])) # optimization
|
||||
else:
|
||||
# FIXME: <fl> add charmap optimization
|
||||
subpattern.append((IN, set))
|
||||
# FIXME: <fl> move set optimization to compiler!
|
||||
if len(set)==1 and set[0][0] is LITERAL:
|
||||
subpattern.append(set[0]) # optimization
|
||||
elif len(set)==2 and set[0][0] is NEGATE and set[1][0] is LITERAL:
|
||||
subpattern.append((NOT_LITERAL, set[1][1])) # optimization
|
||||
else:
|
||||
# FIXME: <fl> add charmap optimization
|
||||
subpattern.append((IN, set))
|
||||
|
||||
elif this and this[0] in REPEAT_CHARS:
|
||||
# repeat previous item
|
||||
if this == "?":
|
||||
min, max = 0, 1
|
||||
elif this == "*":
|
||||
min, max = 0, MAXREPEAT
|
||||
elif this == "+":
|
||||
min, max = 1, MAXREPEAT
|
||||
elif this == "{":
|
||||
min, max = 0, MAXREPEAT
|
||||
lo = hi = ""
|
||||
while source.next in DIGITS:
|
||||
lo = lo + source.get()
|
||||
if source.match(","):
|
||||
while source.next in DIGITS:
|
||||
hi = hi + source.get()
|
||||
else:
|
||||
hi = lo
|
||||
if not source.match("}"):
|
||||
raise error, "bogus range"
|
||||
if lo:
|
||||
min = int(lo)
|
||||
if hi:
|
||||
max = int(hi)
|
||||
# FIXME: <fl> check that hi >= lo!
|
||||
else:
|
||||
raise error, "not supported"
|
||||
# figure out which item to repeat
|
||||
if subpattern:
|
||||
item = subpattern[-1:]
|
||||
else:
|
||||
raise error, "nothing to repeat"
|
||||
if source.match("?"):
|
||||
subpattern[-1] = (MIN_REPEAT, (min, max, item))
|
||||
else:
|
||||
subpattern[-1] = (MAX_REPEAT, (min, max, item))
|
||||
elif this and this[0] in REPEAT_CHARS:
|
||||
# repeat previous item
|
||||
if this == "?":
|
||||
min, max = 0, 1
|
||||
elif this == "*":
|
||||
min, max = 0, MAXREPEAT
|
||||
elif this == "+":
|
||||
min, max = 1, MAXREPEAT
|
||||
elif this == "{":
|
||||
min, max = 0, MAXREPEAT
|
||||
lo = hi = ""
|
||||
while source.next in DIGITS:
|
||||
lo = lo + source.get()
|
||||
if source.match(","):
|
||||
while source.next in DIGITS:
|
||||
hi = hi + source.get()
|
||||
else:
|
||||
hi = lo
|
||||
if not source.match("}"):
|
||||
raise error, "bogus range"
|
||||
if lo:
|
||||
min = int(lo)
|
||||
if hi:
|
||||
max = int(hi)
|
||||
# FIXME: <fl> check that hi >= lo!
|
||||
else:
|
||||
raise error, "not supported"
|
||||
# figure out which item to repeat
|
||||
if subpattern:
|
||||
item = subpattern[-1:]
|
||||
else:
|
||||
raise error, "nothing to repeat"
|
||||
if source.match("?"):
|
||||
subpattern[-1] = (MIN_REPEAT, (min, max, item))
|
||||
else:
|
||||
subpattern[-1] = (MAX_REPEAT, (min, max, item))
|
||||
|
||||
elif this == ".":
|
||||
subpattern.append((ANY, None))
|
||||
elif this == ".":
|
||||
subpattern.append((ANY, None))
|
||||
|
||||
elif this == "(":
|
||||
group = 1
|
||||
name = None
|
||||
if source.match("?"):
|
||||
group = 0
|
||||
# options
|
||||
if source.match("P"):
|
||||
# python extensions
|
||||
if source.match("<"):
|
||||
# named group: skip forward to end of name
|
||||
name = ""
|
||||
while 1:
|
||||
char = source.get()
|
||||
if char is None:
|
||||
raise error, "unterminated name"
|
||||
if char == ">":
|
||||
break
|
||||
name = name + char
|
||||
group = 1
|
||||
if not isname(name):
|
||||
raise error, "illegal character in group name"
|
||||
elif source.match("="):
|
||||
# named backreference
|
||||
raise error, "not yet implemented"
|
||||
else:
|
||||
char = source.get()
|
||||
if char is None:
|
||||
raise error, "unexpected end of pattern"
|
||||
raise error, "unknown specifier: ?P%s" % char
|
||||
elif source.match(":"):
|
||||
# non-capturing group
|
||||
group = 2
|
||||
elif source.match("#"):
|
||||
# comment
|
||||
while 1:
|
||||
if source.next is None or source.next == ")":
|
||||
break
|
||||
source.get()
|
||||
else:
|
||||
# flags
|
||||
while FLAGS.has_key(source.next):
|
||||
state.flags = state.flags | FLAGS[source.get()]
|
||||
if group:
|
||||
# parse group contents
|
||||
b = []
|
||||
if group == 2:
|
||||
# anonymous group
|
||||
group = None
|
||||
else:
|
||||
group = state.getgroup(name)
|
||||
while 1:
|
||||
p = _parse(source, state, flags)
|
||||
if source.match(")"):
|
||||
if b:
|
||||
b.append(p)
|
||||
p = _branch(state, b)
|
||||
subpattern.append((SUBPATTERN, (group, p)))
|
||||
break
|
||||
elif source.match("|"):
|
||||
b.append(p)
|
||||
else:
|
||||
raise error, "group not properly closed"
|
||||
else:
|
||||
while 1:
|
||||
char = source.get()
|
||||
if char is None or char == ")":
|
||||
break
|
||||
raise error, "unknown extension"
|
||||
elif this == "(":
|
||||
group = 1
|
||||
name = None
|
||||
if source.match("?"):
|
||||
group = 0
|
||||
# options
|
||||
if source.match("P"):
|
||||
# python extensions
|
||||
if source.match("<"):
|
||||
# named group: skip forward to end of name
|
||||
name = ""
|
||||
while 1:
|
||||
char = source.get()
|
||||
if char is None:
|
||||
raise error, "unterminated name"
|
||||
if char == ">":
|
||||
break
|
||||
name = name + char
|
||||
group = 1
|
||||
if not isname(name):
|
||||
raise error, "illegal character in group name"
|
||||
elif source.match("="):
|
||||
# named backreference
|
||||
raise error, "not yet implemented"
|
||||
else:
|
||||
char = source.get()
|
||||
if char is None:
|
||||
raise error, "unexpected end of pattern"
|
||||
raise error, "unknown specifier: ?P%s" % char
|
||||
elif source.match(":"):
|
||||
# non-capturing group
|
||||
group = 2
|
||||
elif source.match("#"):
|
||||
# comment
|
||||
while 1:
|
||||
if source.next is None or source.next == ")":
|
||||
break
|
||||
source.get()
|
||||
else:
|
||||
# flags
|
||||
while FLAGS.has_key(source.next):
|
||||
state.flags = state.flags | FLAGS[source.get()]
|
||||
if group:
|
||||
# parse group contents
|
||||
b = []
|
||||
if group == 2:
|
||||
# anonymous group
|
||||
group = None
|
||||
else:
|
||||
group = state.getgroup(name)
|
||||
while 1:
|
||||
p = _parse(source, state, flags)
|
||||
if source.match(")"):
|
||||
if b:
|
||||
b.append(p)
|
||||
p = _branch(state, b)
|
||||
subpattern.append((SUBPATTERN, (group, p)))
|
||||
break
|
||||
elif source.match("|"):
|
||||
b.append(p)
|
||||
else:
|
||||
raise error, "group not properly closed"
|
||||
else:
|
||||
while 1:
|
||||
char = source.get()
|
||||
if char is None or char == ")":
|
||||
break
|
||||
raise error, "unknown extension"
|
||||
|
||||
elif this == "^":
|
||||
subpattern.append((AT, AT_BEGINNING))
|
||||
elif this == "^":
|
||||
subpattern.append((AT, AT_BEGINNING))
|
||||
|
||||
elif this == "$":
|
||||
subpattern.append((AT, AT_END))
|
||||
elif this == "$":
|
||||
subpattern.append((AT, AT_END))
|
||||
|
||||
elif this and this[0] == "\\":
|
||||
code = _escape(source, this, state)
|
||||
subpattern.append(code)
|
||||
elif this and this[0] == "\\":
|
||||
code = _escape(source, this, state)
|
||||
subpattern.append(code)
|
||||
|
||||
else:
|
||||
raise error, "parser error"
|
||||
else:
|
||||
raise error, "parser error"
|
||||
|
||||
return subpattern
|
||||
|
||||
@ -509,19 +509,19 @@ def parse(pattern, flags=0):
|
||||
state = State()
|
||||
b = []
|
||||
while 1:
|
||||
p = _parse(source, state, flags)
|
||||
tail = source.get()
|
||||
if tail == "|":
|
||||
b.append(p)
|
||||
elif tail == ")":
|
||||
raise error, "unbalanced parenthesis"
|
||||
elif tail is None:
|
||||
if b:
|
||||
b.append(p)
|
||||
p = _branch(state, b)
|
||||
break
|
||||
else:
|
||||
raise error, "bogus characters at end of regular expression"
|
||||
p = _parse(source, state, flags)
|
||||
tail = source.get()
|
||||
if tail == "|":
|
||||
b.append(p)
|
||||
elif tail == ")":
|
||||
raise error, "unbalanced parenthesis"
|
||||
elif tail is None:
|
||||
if b:
|
||||
b.append(p)
|
||||
p = _branch(state, b)
|
||||
break
|
||||
else:
|
||||
raise error, "bogus characters at end of regular expression"
|
||||
return p
|
||||
|
||||
def parse_template(source, pattern):
|
||||
@ -531,59 +531,59 @@ def parse_template(source, pattern):
|
||||
p = []
|
||||
a = p.append
|
||||
while 1:
|
||||
this = s.get()
|
||||
if this is None:
|
||||
break # end of replacement string
|
||||
if this and this[0] == "\\":
|
||||
# group
|
||||
if this == "\\g":
|
||||
name = ""
|
||||
if s.match("<"):
|
||||
while 1:
|
||||
char = s.get()
|
||||
if char is None:
|
||||
raise error, "unterminated group name"
|
||||
if char == ">":
|
||||
break
|
||||
name = name + char
|
||||
if not name:
|
||||
raise error, "bad group name"
|
||||
try:
|
||||
index = int(name)
|
||||
except ValueError:
|
||||
if not isname(name):
|
||||
raise error, "illegal character in group name"
|
||||
try:
|
||||
index = pattern.groupindex[name]
|
||||
except KeyError:
|
||||
raise IndexError, "unknown group name"
|
||||
a((MARK, index))
|
||||
elif len(this) > 1 and this[1] in DIGITS:
|
||||
code = None
|
||||
while 1:
|
||||
group = _group(this, pattern.groups+1)
|
||||
if group:
|
||||
if (not s.next or
|
||||
not _group(this + s.next, pattern.groups+1)):
|
||||
code = MARK, int(group)
|
||||
break
|
||||
elif s.next in OCTDIGITS:
|
||||
this = this + s.get()
|
||||
else:
|
||||
break
|
||||
if not code:
|
||||
this = this[1:]
|
||||
# FIXME: support unicode characters!
|
||||
code = LITERAL, chr(int(this[-6:], 8) & 0xff)
|
||||
a(code)
|
||||
else:
|
||||
try:
|
||||
a(ESCAPES[this])
|
||||
except KeyError:
|
||||
for c in this:
|
||||
a((LITERAL, c))
|
||||
else:
|
||||
a((LITERAL, this))
|
||||
this = s.get()
|
||||
if this is None:
|
||||
break # end of replacement string
|
||||
if this and this[0] == "\\":
|
||||
# group
|
||||
if this == "\\g":
|
||||
name = ""
|
||||
if s.match("<"):
|
||||
while 1:
|
||||
char = s.get()
|
||||
if char is None:
|
||||
raise error, "unterminated group name"
|
||||
if char == ">":
|
||||
break
|
||||
name = name + char
|
||||
if not name:
|
||||
raise error, "bad group name"
|
||||
try:
|
||||
index = int(name)
|
||||
except ValueError:
|
||||
if not isname(name):
|
||||
raise error, "illegal character in group name"
|
||||
try:
|
||||
index = pattern.groupindex[name]
|
||||
except KeyError:
|
||||
raise IndexError, "unknown group name"
|
||||
a((MARK, index))
|
||||
elif len(this) > 1 and this[1] in DIGITS:
|
||||
code = None
|
||||
while 1:
|
||||
group = _group(this, pattern.groups+1)
|
||||
if group:
|
||||
if (not s.next or
|
||||
not _group(this + s.next, pattern.groups+1)):
|
||||
code = MARK, int(group)
|
||||
break
|
||||
elif s.next in OCTDIGITS:
|
||||
this = this + s.get()
|
||||
else:
|
||||
break
|
||||
if not code:
|
||||
this = this[1:]
|
||||
# FIXME: support unicode characters!
|
||||
code = LITERAL, chr(int(this[-6:], 8) & 0xff)
|
||||
a(code)
|
||||
else:
|
||||
try:
|
||||
a(ESCAPES[this])
|
||||
except KeyError:
|
||||
for c in this:
|
||||
a((LITERAL, c))
|
||||
else:
|
||||
a((LITERAL, this))
|
||||
return p
|
||||
|
||||
def expand_template(template, match):
|
||||
@ -592,11 +592,11 @@ def expand_template(template, match):
|
||||
p = []
|
||||
a = p.append
|
||||
for c, s in template:
|
||||
if c is LITERAL:
|
||||
a(s)
|
||||
elif c is MARK:
|
||||
s = match.group(s)
|
||||
if s is None:
|
||||
raise error, "empty group"
|
||||
a(s)
|
||||
if c is LITERAL:
|
||||
a(s)
|
||||
elif c is MARK:
|
||||
s = match.group(s)
|
||||
if s is None:
|
||||
raise error, "empty group"
|
||||
a(s)
|
||||
return match.string[:0].join(p)
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
# FIXME: this is basically test_re.py, with a few
|
||||
# FIXME: this is basically test_re.py, with a few minor changes
|
||||
|
||||
import sys
|
||||
sys.path=['.']+sys.path
|
||||
@ -337,7 +337,7 @@ for t in tests:
|
||||
print repr(repl)+' should be '+repr(expected)
|
||||
else:
|
||||
print '=== Failed incorrectly', t
|
||||
continue
|
||||
continue
|
||||
|
||||
# Try the match on a unicode string, and check that it
|
||||
# still succeeds.
|
||||
@ -359,9 +359,9 @@ for t in tests:
|
||||
|
||||
if pattern[:2]!='\\B' and pattern[-2:]!='\\B':
|
||||
obj=sre.compile(pattern)
|
||||
result=obj.search(s, result.start(0), result.end(0)+1)
|
||||
if result==None:
|
||||
print '=== Failed on range-limited match', t
|
||||
result=obj.search(s, result.start(0), result.end(0)+1)
|
||||
if result==None:
|
||||
print '=== Failed on range-limited match', t
|
||||
|
||||
# Try the match with IGNORECASE enabled, and check that it
|
||||
# still succeeds.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user