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-rw-r--r--Lib/sre_compile.py159
1 files changed, 66 insertions, 93 deletions
diff --git a/Lib/sre_compile.py b/Lib/sre_compile.py
index 2d7c021..a51531b 100644
--- a/Lib/sre_compile.py
+++ b/Lib/sre_compile.py
@@ -11,8 +11,7 @@
# other compatibility work.
#
-import array, string, sys
-
+import array
import _sre
from sre_constants import *
@@ -24,123 +23,101 @@ for WORDSIZE in "BHil":
else:
raise RuntimeError, "cannot find a useable array type"
-# FIXME: <fl> should move some optimizations from the parser to here!
-
-class Code:
- def __init__(self):
- self.data = []
- def __len__(self):
- return len(self.data)
- def __getitem__(self, index):
- return self.data[index]
- def __setitem__(self, index, code):
- self.data[index] = code
- def append(self, code):
- self.data.append(code)
- def todata(self):
- # print self.data
- try:
- return array.array(WORDSIZE, self.data).tostring()
- except OverflowError:
- print self.data
- raise
-
def _compile(code, pattern, flags):
- append = code.append
+ emit = code.append
for op, av in pattern:
if op is ANY:
if flags & SRE_FLAG_DOTALL:
- append(OPCODES[op]) # any character at all!
+ emit(OPCODES[op])
else:
- append(OPCODES[CATEGORY])
- append(CHCODES[CATEGORY_NOT_LINEBREAK])
+ emit(OPCODES[CATEGORY])
+ emit(CHCODES[CATEGORY_NOT_LINEBREAK])
elif op in (SUCCESS, FAILURE):
- append(OPCODES[op])
+ emit(OPCODES[op])
elif op is AT:
- append(OPCODES[op])
+ emit(OPCODES[op])
if flags & SRE_FLAG_MULTILINE:
- append(ATCODES[AT_MULTILINE[av]])
+ emit(ATCODES[AT_MULTILINE[av]])
else:
- append(ATCODES[av])
+ emit(ATCODES[av])
elif op is BRANCH:
- append(OPCODES[op])
+ emit(OPCODES[op])
tail = []
for av in av[1]:
- skip = len(code); append(0)
+ skip = len(code); emit(0)
_compile(code, av, flags)
-## append(OPCODES[SUCCESS])
- append(OPCODES[JUMP])
- tail.append(len(code)); append(0)
+ emit(OPCODES[JUMP])
+ tail.append(len(code)); emit(0)
code[skip] = len(code) - skip
- append(0) # end of branch
+ emit(0) # end of branch
for tail in tail:
code[tail] = len(code) - tail
elif op is CALL:
- append(OPCODES[op])
- skip = len(code); append(0)
+ emit(OPCODES[op])
+ skip = len(code); emit(0)
_compile(code, av, flags)
- append(OPCODES[SUCCESS])
+ emit(OPCODES[SUCCESS])
code[skip] = len(code) - skip
elif op is CATEGORY:
- append(OPCODES[op])
+ emit(OPCODES[op])
if flags & SRE_FLAG_LOCALE:
- append(CH_LOCALE[CHCODES[av]])
+ emit(CH_LOCALE[CHCODES[av]])
elif flags & SRE_FLAG_UNICODE:
- append(CH_UNICODE[CHCODES[av]])
+ emit(CH_UNICODE[CHCODES[av]])
else:
- append(CHCODES[av])
+ emit(CHCODES[av])
elif op is GROUP:
if flags & SRE_FLAG_IGNORECASE:
- append(OPCODES[OP_IGNORE[op]])
+ emit(OPCODES[OP_IGNORE[op]])
else:
- append(OPCODES[op])
- append(av-1)
+ emit(OPCODES[op])
+ emit(av-1)
elif op is IN:
if flags & SRE_FLAG_IGNORECASE:
- append(OPCODES[OP_IGNORE[op]])
+ emit(OPCODES[OP_IGNORE[op]])
def fixup(literal, flags=flags):
return _sre.getlower(ord(literal), flags)
else:
- append(OPCODES[op])
+ emit(OPCODES[op])
fixup = ord
- skip = len(code); append(0)
+ skip = len(code); emit(0)
for op, av in av:
- append(OPCODES[op])
+ emit(OPCODES[op])
if op is NEGATE:
pass
elif op is LITERAL:
- append(fixup(av))
+ emit(fixup(av))
elif op is RANGE:
- append(fixup(av[0]))
- append(fixup(av[1]))
+ emit(fixup(av[0]))
+ emit(fixup(av[1]))
elif op is CATEGORY:
if flags & SRE_FLAG_LOCALE:
- append(CH_LOCALE[CHCODES[av]])
+ emit(CH_LOCALE[CHCODES[av]])
elif flags & SRE_FLAG_UNICODE:
- append(CH_UNICODE[CHCODES[av]])
+ emit(CH_UNICODE[CHCODES[av]])
else:
- append(CHCODES[av])
+ emit(CHCODES[av])
else:
- raise ValueError, "unsupported set operator"
- append(OPCODES[FAILURE])
+ raise error, "internal: unsupported set operator"
+ emit(OPCODES[FAILURE])
code[skip] = len(code) - skip
elif op in (LITERAL, NOT_LITERAL):
if flags & SRE_FLAG_IGNORECASE:
- append(OPCODES[OP_IGNORE[op]])
+ emit(OPCODES[OP_IGNORE[op]])
else:
- append(OPCODES[op])
- append(ord(av))
+ emit(OPCODES[op])
+ emit(ord(av))
elif op is MARK:
- append(OPCODES[op])
- append(av)
+ emit(OPCODES[op])
+ emit(av)
elif op in (REPEAT, MIN_REPEAT, MAX_REPEAT):
if flags & SRE_FLAG_TEMPLATE:
- append(OPCODES[REPEAT])
- skip = len(code); append(0)
- append(av[0])
- append(av[1])
+ emit(OPCODES[REPEAT])
+ skip = len(code); emit(0)
+ emit(av[0])
+ emit(av[1])
_compile(code, av[2], flags)
- append(OPCODES[SUCCESS])
+ emit(OPCODES[SUCCESS])
code[skip] = len(code) - skip
else:
lo, hi = av[2].getwidth()
@@ -149,35 +126,35 @@ def _compile(code, pattern, flags):
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])
+ emit(OPCODES[MAX_REPEAT_ONE])
+ skip = len(code); emit(0)
+ emit(av[0])
+ emit(av[1])
_compile(code, av[2], flags)
- append(OPCODES[SUCCESS])
+ emit(OPCODES[SUCCESS])
code[skip] = len(code) - skip
else:
- append(OPCODES[op])
- skip = len(code); append(0)
- append(av[0])
- append(av[1])
+ emit(OPCODES[op])
+ skip = len(code); emit(0)
+ emit(av[0])
+ emit(av[1])
_compile(code, av[2], flags)
- append(OPCODES[SUCCESS])
+ emit(OPCODES[SUCCESS])
code[skip] = len(code) - skip
elif op is SUBPATTERN:
group = av[0]
if group:
- append(OPCODES[MARK])
- append((group-1)*2)
+ emit(OPCODES[MARK])
+ emit((group-1)*2)
_compile(code, av[1], flags)
if group:
- append(OPCODES[MARK])
- append((group-1)*2+1)
+ emit(OPCODES[MARK])
+ emit((group-1)*2+1)
else:
raise ValueError, ("unsupported operand type", op)
def compile(p, flags=0):
- # convert pattern list to internal format
+ # internal: convert pattern list to internal format
if type(p) in (type(""), type(u"")):
import sre_parse
pattern = p
@@ -185,18 +162,14 @@ def compile(p, flags=0):
else:
pattern = None
flags = p.pattern.flags | flags
- code = Code()
+ code = []
_compile(code, p.data, flags)
code.append(OPCODES[SUCCESS])
- data = code.todata()
- if 0: # debugging
- print
- print "-" * 68
- import sre_disasm
- sre_disasm.disasm(data)
- print "-" * 68
+ # FIXME: <fl> get rid of this limitation
+ assert p.pattern.groups <= 100,\
+ "sorry, but this version only supports 100 named groups"
return _sre.compile(
pattern, flags,
- data,
+ array.array(WORDSIZE, code).tostring(),
p.pattern.groups-1, p.pattern.groupdict
)
generated by cgit v0.12 at 2024-11-17 03:18:00 (GMT)