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towards 1.6b1

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This commit is contained in:
Fredrik Lundh 2000-06-29 08:58:44 +00:00
parent 102f3ad676
commit 436c3d58a2
5 changed files with 573 additions and 341 deletions
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66
Lib/sre_compile.py
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@ -48,7 +48,7 @@ class Code:
print self.data
raise
def _compile(code, pattern, flags, level=0):
def _compile(code, pattern, flags):
append = code.append
for op, av in pattern:
if op is ANY:
@ -70,23 +70,26 @@ def _compile(code, pattern, flags, level=0):
tail = []
for av in av[1]:
skip = len(code); append(0)
_compile(code, av, flags, level)
append(OPCODES[JUMP])
tail.append(len(code)); append(0)
_compile(code, av, flags)
## append(OPCODES[SUCCESS])
append(OPCODES[JUMP])
tail.append(len(code)); append(0)
code[skip] = len(code) - skip
append(0) # end of branch
for tail in tail:
for tail in tail:
code[tail] = len(code) - tail
elif op is CALL:
append(OPCODES[op])
skip = len(code); append(0)
_compile(code, av, flags, level+1)
_compile(code, av, flags)
append(OPCODES[SUCCESS])
code[skip] = len(code) - skip
elif op is CATEGORY: # not used by current parser
elif op is CATEGORY:
append(OPCODES[op])
if flags & SRE_FLAG_LOCALE:
append(CH_LOCALE[CHCODES[av]])
elif flags & SRE_FLAG_UNICODE:
append(CH_UNICODE[CHCODES[av]])
else:
append(CHCODES[av])
elif op is GROUP:
@ -98,8 +101,8 @@ def _compile(code, pattern, flags, level=0):
elif op is IN:
if flags & SRE_FLAG_IGNORECASE:
append(OPCODES[OP_IGNORE[op]])
def fixup(literal):
return ord(literal.lower())
def fixup(literal, flags=flags):
return _sre.getlower(ord(literal), flags)
else:
append(OPCODES[op])
fixup = ord
@ -116,6 +119,8 @@ def _compile(code, pattern, flags, level=0):
elif op is CATEGORY:
if flags & SRE_FLAG_LOCALE:
append(CH_LOCALE[CHCODES[av]])
elif flags & SRE_FLAG_UNICODE:
append(CH_UNICODE[CHCODES[av]])
else:
append(CHCODES[av])
else:
@ -125,42 +130,49 @@ def _compile(code, pattern, flags, level=0):
elif op in (LITERAL, NOT_LITERAL):
if flags & SRE_FLAG_IGNORECASE:
append(OPCODES[OP_IGNORE[op]])
append(ord(av.lower()))
else:
append(OPCODES[op])
append(ord(av))
append(ord(av))
elif op is MARK:
append(OPCODES[op])
append(av)
elif op in (REPEAT, MIN_REPEAT, MAX_REPEAT):
lo, hi = av[2].getwidth()
if lo == 0:
raise SyntaxError, "cannot repeat zero-width items"
if lo == hi == 1 and op is MAX_REPEAT:
append(OPCODES[MAX_REPEAT_ONE])
if flags & SRE_FLAG_TEMPLATE:
append(OPCODES[REPEAT])
skip = len(code); append(0)
append(av[0])
append(av[1])
_compile(code, av[2], flags, level+1)
_compile(code, av[2], flags)
append(OPCODES[SUCCESS])
code[skip] = len(code) - skip
else:
append(OPCODES[op])
skip = len(code); append(0)
append(av[0])
append(av[1])
_compile(code, av[2], flags, level+1)
if op is MIN_REPEAT:
append(OPCODES[MIN_UNTIL])
lo, hi = av[2].getwidth()
if lo == 0:
raise error, "nothing to repeat"
if 0 and lo == hi == 1 and op is MAX_REPEAT:
# FIXME: <fl> need a better way to figure out when
# it's safe to use this one (in the parser, probably)
append(OPCODES[MAX_REPEAT_ONE])
skip = len(code); append(0)
append(av[0])
append(av[1])
_compile(code, av[2], flags)
append(OPCODES[SUCCESS])
code[skip] = len(code) - skip
else:
append(OPCODES[MAX_UNTIL])
code[skip] = len(code) - skip
append(OPCODES[op])
skip = len(code); append(0)
append(av[0])
append(av[1])
_compile(code, av[2], flags)
append(OPCODES[SUCCESS])
code[skip] = len(code) - skip
elif op is SUBPATTERN:
group = av[0]
if group:
append(OPCODES[MARK])
append((group-1)*2)
_compile(code, av[1], flags, level+1)
_compile(code, av[1], flags)
if group:
append(OPCODES[MARK])
append((group-1)*2+1)