mirror of
https://github.com/python/cpython.git
synced 2025-11-04 11:49:12 +00:00
819830f34a
* upper-case non-BMP character was ignored * the ASCII flag was ignored when matching a character range whose upper bound is beyond the BMP region
782 lines
26 KiB
Python
782 lines
26 KiB
Python
#
|
|
# Secret Labs' Regular Expression Engine
|
|
#
|
|
# convert template to internal format
|
|
#
|
|
# Copyright (c) 1997-2001 by Secret Labs AB. All rights reserved.
|
|
#
|
|
# See the __init__.py file for information on usage and redistribution.
|
|
#
|
|
|
|
"""Internal support module for sre"""
|
|
|
|
import _sre
|
|
from . import _parser
|
|
from ._constants import *
|
|
from ._casefix import _EXTRA_CASES
|
|
|
|
assert _sre.MAGIC == MAGIC, "SRE module mismatch"
|
|
|
|
_LITERAL_CODES = {LITERAL, NOT_LITERAL}
|
|
_SUCCESS_CODES = {SUCCESS, FAILURE}
|
|
_ASSERT_CODES = {ASSERT, ASSERT_NOT}
|
|
_UNIT_CODES = _LITERAL_CODES | {ANY, IN}
|
|
|
|
_REPEATING_CODES = {
|
|
MIN_REPEAT: (REPEAT, MIN_UNTIL, MIN_REPEAT_ONE),
|
|
MAX_REPEAT: (REPEAT, MAX_UNTIL, REPEAT_ONE),
|
|
POSSESSIVE_REPEAT: (POSSESSIVE_REPEAT, SUCCESS, POSSESSIVE_REPEAT_ONE),
|
|
}
|
|
|
|
_CHARSET_ALL = [(NEGATE, None)]
|
|
|
|
def _combine_flags(flags, add_flags, del_flags,
|
|
TYPE_FLAGS=_parser.TYPE_FLAGS):
|
|
if add_flags & TYPE_FLAGS:
|
|
flags &= ~TYPE_FLAGS
|
|
return (flags | add_flags) & ~del_flags
|
|
|
|
def _compile(code, pattern, flags):
|
|
# internal: compile a (sub)pattern
|
|
emit = code.append
|
|
_len = len
|
|
LITERAL_CODES = _LITERAL_CODES
|
|
REPEATING_CODES = _REPEATING_CODES
|
|
SUCCESS_CODES = _SUCCESS_CODES
|
|
ASSERT_CODES = _ASSERT_CODES
|
|
iscased = None
|
|
tolower = None
|
|
fixes = None
|
|
if flags & SRE_FLAG_IGNORECASE and not flags & SRE_FLAG_LOCALE:
|
|
if flags & SRE_FLAG_UNICODE:
|
|
iscased = _sre.unicode_iscased
|
|
tolower = _sre.unicode_tolower
|
|
fixes = _EXTRA_CASES
|
|
else:
|
|
iscased = _sre.ascii_iscased
|
|
tolower = _sre.ascii_tolower
|
|
for op, av in pattern:
|
|
if op in LITERAL_CODES:
|
|
if not flags & SRE_FLAG_IGNORECASE:
|
|
emit(op)
|
|
emit(av)
|
|
elif flags & SRE_FLAG_LOCALE:
|
|
emit(OP_LOCALE_IGNORE[op])
|
|
emit(av)
|
|
elif not iscased(av):
|
|
emit(op)
|
|
emit(av)
|
|
else:
|
|
lo = tolower(av)
|
|
if not fixes: # ascii
|
|
emit(OP_IGNORE[op])
|
|
emit(lo)
|
|
elif lo not in fixes:
|
|
emit(OP_UNICODE_IGNORE[op])
|
|
emit(lo)
|
|
else:
|
|
emit(IN_UNI_IGNORE)
|
|
skip = _len(code); emit(0)
|
|
if op is NOT_LITERAL:
|
|
emit(NEGATE)
|
|
for k in (lo,) + fixes[lo]:
|
|
emit(LITERAL)
|
|
emit(k)
|
|
emit(FAILURE)
|
|
code[skip] = _len(code) - skip
|
|
elif op is IN:
|
|
charset, hascased = _optimize_charset(av, iscased, tolower, fixes)
|
|
if not charset:
|
|
emit(FAILURE)
|
|
elif charset == _CHARSET_ALL:
|
|
emit(ANY_ALL)
|
|
else:
|
|
if flags & SRE_FLAG_IGNORECASE and flags & SRE_FLAG_LOCALE:
|
|
emit(IN_LOC_IGNORE)
|
|
elif not hascased:
|
|
emit(IN)
|
|
elif not fixes: # ascii
|
|
emit(IN_IGNORE)
|
|
else:
|
|
emit(IN_UNI_IGNORE)
|
|
skip = _len(code); emit(0)
|
|
_compile_charset(charset, flags, code)
|
|
code[skip] = _len(code) - skip
|
|
elif op is ANY:
|
|
if flags & SRE_FLAG_DOTALL:
|
|
emit(ANY_ALL)
|
|
else:
|
|
emit(ANY)
|
|
elif op in REPEATING_CODES:
|
|
if _simple(av[2]):
|
|
emit(REPEATING_CODES[op][2])
|
|
skip = _len(code); emit(0)
|
|
emit(av[0])
|
|
emit(av[1])
|
|
_compile(code, av[2], flags)
|
|
emit(SUCCESS)
|
|
code[skip] = _len(code) - skip
|
|
else:
|
|
emit(REPEATING_CODES[op][0])
|
|
skip = _len(code); emit(0)
|
|
emit(av[0])
|
|
emit(av[1])
|
|
_compile(code, av[2], flags)
|
|
code[skip] = _len(code) - skip
|
|
emit(REPEATING_CODES[op][1])
|
|
elif op is SUBPATTERN:
|
|
group, add_flags, del_flags, p = av
|
|
if group:
|
|
emit(MARK)
|
|
emit((group-1)*2)
|
|
# _compile_info(code, p, _combine_flags(flags, add_flags, del_flags))
|
|
_compile(code, p, _combine_flags(flags, add_flags, del_flags))
|
|
if group:
|
|
emit(MARK)
|
|
emit((group-1)*2+1)
|
|
elif op is ATOMIC_GROUP:
|
|
# Atomic Groups are handled by starting with an Atomic
|
|
# Group op code, then putting in the atomic group pattern
|
|
# and finally a success op code to tell any repeat
|
|
# operations within the Atomic Group to stop eating and
|
|
# pop their stack if they reach it
|
|
emit(ATOMIC_GROUP)
|
|
skip = _len(code); emit(0)
|
|
_compile(code, av, flags)
|
|
emit(SUCCESS)
|
|
code[skip] = _len(code) - skip
|
|
elif op in SUCCESS_CODES:
|
|
emit(op)
|
|
elif op in ASSERT_CODES:
|
|
emit(op)
|
|
skip = _len(code); emit(0)
|
|
if av[0] >= 0:
|
|
emit(0) # look ahead
|
|
else:
|
|
lo, hi = av[1].getwidth()
|
|
if lo > MAXCODE:
|
|
raise error("looks too much behind")
|
|
if lo != hi:
|
|
raise PatternError("look-behind requires fixed-width pattern")
|
|
emit(lo) # look behind
|
|
_compile(code, av[1], flags)
|
|
emit(SUCCESS)
|
|
code[skip] = _len(code) - skip
|
|
elif op is AT:
|
|
emit(op)
|
|
if flags & SRE_FLAG_MULTILINE:
|
|
av = AT_MULTILINE.get(av, av)
|
|
if flags & SRE_FLAG_LOCALE:
|
|
av = AT_LOCALE.get(av, av)
|
|
elif flags & SRE_FLAG_UNICODE:
|
|
av = AT_UNICODE.get(av, av)
|
|
emit(av)
|
|
elif op is BRANCH:
|
|
emit(op)
|
|
tail = []
|
|
tailappend = tail.append
|
|
for av in av[1]:
|
|
skip = _len(code); emit(0)
|
|
# _compile_info(code, av, flags)
|
|
_compile(code, av, flags)
|
|
emit(JUMP)
|
|
tailappend(_len(code)); emit(0)
|
|
code[skip] = _len(code) - skip
|
|
emit(FAILURE) # end of branch
|
|
for tail in tail:
|
|
code[tail] = _len(code) - tail
|
|
elif op is CATEGORY:
|
|
emit(op)
|
|
if flags & SRE_FLAG_LOCALE:
|
|
av = CH_LOCALE[av]
|
|
elif flags & SRE_FLAG_UNICODE:
|
|
av = CH_UNICODE[av]
|
|
emit(av)
|
|
elif op is GROUPREF:
|
|
if not flags & SRE_FLAG_IGNORECASE:
|
|
emit(op)
|
|
elif flags & SRE_FLAG_LOCALE:
|
|
emit(GROUPREF_LOC_IGNORE)
|
|
elif not fixes: # ascii
|
|
emit(GROUPREF_IGNORE)
|
|
else:
|
|
emit(GROUPREF_UNI_IGNORE)
|
|
emit(av-1)
|
|
elif op is GROUPREF_EXISTS:
|
|
emit(op)
|
|
emit(av[0]-1)
|
|
skipyes = _len(code); emit(0)
|
|
_compile(code, av[1], flags)
|
|
if av[2]:
|
|
emit(JUMP)
|
|
skipno = _len(code); emit(0)
|
|
code[skipyes] = _len(code) - skipyes + 1
|
|
_compile(code, av[2], flags)
|
|
code[skipno] = _len(code) - skipno
|
|
else:
|
|
code[skipyes] = _len(code) - skipyes + 1
|
|
else:
|
|
raise PatternError(f"internal: unsupported operand type {op!r}")
|
|
|
|
def _compile_charset(charset, flags, code):
|
|
# compile charset subprogram
|
|
emit = code.append
|
|
for op, av in charset:
|
|
emit(op)
|
|
if op is NEGATE:
|
|
pass
|
|
elif op is LITERAL:
|
|
emit(av)
|
|
elif op is RANGE or op is RANGE_UNI_IGNORE:
|
|
emit(av[0])
|
|
emit(av[1])
|
|
elif op is CHARSET:
|
|
code.extend(av)
|
|
elif op is BIGCHARSET:
|
|
code.extend(av)
|
|
elif op is CATEGORY:
|
|
if flags & SRE_FLAG_LOCALE:
|
|
emit(CH_LOCALE[av])
|
|
elif flags & SRE_FLAG_UNICODE:
|
|
emit(CH_UNICODE[av])
|
|
else:
|
|
emit(av)
|
|
else:
|
|
raise PatternError(f"internal: unsupported set operator {op!r}")
|
|
emit(FAILURE)
|
|
|
|
def _optimize_charset(charset, iscased=None, fixup=None, fixes=None):
|
|
# internal: optimize character set
|
|
out = []
|
|
tail = []
|
|
charmap = bytearray(256)
|
|
hascased = False
|
|
for op, av in charset:
|
|
while True:
|
|
try:
|
|
if op is LITERAL:
|
|
if fixup: # IGNORECASE and not LOCALE
|
|
av = fixup(av)
|
|
charmap[av] = 1
|
|
if fixes and av in fixes:
|
|
for k in fixes[av]:
|
|
charmap[k] = 1
|
|
if not hascased and iscased(av):
|
|
hascased = True
|
|
else:
|
|
charmap[av] = 1
|
|
elif op is RANGE:
|
|
r = range(av[0], av[1]+1)
|
|
if fixup: # IGNORECASE and not LOCALE
|
|
if fixes:
|
|
for i in map(fixup, r):
|
|
charmap[i] = 1
|
|
if i in fixes:
|
|
for k in fixes[i]:
|
|
charmap[k] = 1
|
|
else:
|
|
for i in map(fixup, r):
|
|
charmap[i] = 1
|
|
if not hascased:
|
|
hascased = any(map(iscased, r))
|
|
else:
|
|
for i in r:
|
|
charmap[i] = 1
|
|
elif op is NEGATE:
|
|
out.append((op, av))
|
|
elif op is CATEGORY and tail and (CATEGORY, CH_NEGATE[av]) in tail:
|
|
# Optimize [\s\S] etc.
|
|
out = [] if out else _CHARSET_ALL
|
|
return out, False
|
|
else:
|
|
tail.append((op, av))
|
|
except IndexError:
|
|
if len(charmap) == 256:
|
|
# character set contains non-UCS1 character codes
|
|
charmap += b'\0' * 0xff00
|
|
continue
|
|
# Character set contains non-BMP character codes.
|
|
# For range, all BMP characters in the range are already
|
|
# proceeded.
|
|
if fixup: # IGNORECASE and not LOCALE
|
|
# For now, IN_UNI_IGNORE+LITERAL and
|
|
# IN_UNI_IGNORE+RANGE_UNI_IGNORE work for all non-BMP
|
|
# characters, because two characters (at least one of
|
|
# which is not in the BMP) match case-insensitively
|
|
# if and only if:
|
|
# 1) c1.lower() == c2.lower()
|
|
# 2) c1.lower() == c2 or c1.lower().upper() == c2
|
|
# Also, both c.lower() and c.lower().upper() are single
|
|
# characters for every non-BMP character.
|
|
if op is RANGE:
|
|
if fixes: # not ASCII
|
|
op = RANGE_UNI_IGNORE
|
|
hascased = True
|
|
else:
|
|
assert op is LITERAL
|
|
if not hascased and iscased(av):
|
|
hascased = True
|
|
tail.append((op, av))
|
|
break
|
|
|
|
# compress character map
|
|
runs = []
|
|
q = 0
|
|
while True:
|
|
p = charmap.find(1, q)
|
|
if p < 0:
|
|
break
|
|
if len(runs) >= 2:
|
|
runs = None
|
|
break
|
|
q = charmap.find(0, p)
|
|
if q < 0:
|
|
runs.append((p, len(charmap)))
|
|
break
|
|
runs.append((p, q))
|
|
if runs is not None:
|
|
# use literal/range
|
|
for p, q in runs:
|
|
if q - p == 1:
|
|
out.append((LITERAL, p))
|
|
else:
|
|
out.append((RANGE, (p, q - 1)))
|
|
out += tail
|
|
# if the case was changed or new representation is more compact
|
|
if hascased or len(out) < len(charset):
|
|
return out, hascased
|
|
# else original character set is good enough
|
|
return charset, hascased
|
|
|
|
# use bitmap
|
|
if len(charmap) == 256:
|
|
data = _mk_bitmap(charmap)
|
|
out.append((CHARSET, data))
|
|
out += tail
|
|
return out, hascased
|
|
|
|
# To represent a big charset, first a bitmap of all characters in the
|
|
# set is constructed. Then, this bitmap is sliced into chunks of 256
|
|
# characters, duplicate chunks are eliminated, and each chunk is
|
|
# given a number. In the compiled expression, the charset is
|
|
# represented by a 32-bit word sequence, consisting of one word for
|
|
# the number of different chunks, a sequence of 256 bytes (64 words)
|
|
# of chunk numbers indexed by their original chunk position, and a
|
|
# sequence of 256-bit chunks (8 words each).
|
|
|
|
# Compression is normally good: in a typical charset, large ranges of
|
|
# Unicode will be either completely excluded (e.g. if only cyrillic
|
|
# letters are to be matched), or completely included (e.g. if large
|
|
# subranges of Kanji match). These ranges will be represented by
|
|
# chunks of all one-bits or all zero-bits.
|
|
|
|
# Matching can be also done efficiently: the more significant byte of
|
|
# the Unicode character is an index into the chunk number, and the
|
|
# less significant byte is a bit index in the chunk (just like the
|
|
# CHARSET matching).
|
|
|
|
charmap = bytes(charmap) # should be hashable
|
|
comps = {}
|
|
mapping = bytearray(256)
|
|
block = 0
|
|
data = bytearray()
|
|
for i in range(0, 65536, 256):
|
|
chunk = charmap[i: i + 256]
|
|
if chunk in comps:
|
|
mapping[i // 256] = comps[chunk]
|
|
else:
|
|
mapping[i // 256] = comps[chunk] = block
|
|
block += 1
|
|
data += chunk
|
|
data = _mk_bitmap(data)
|
|
data[0:0] = [block] + _bytes_to_codes(mapping)
|
|
out.append((BIGCHARSET, data))
|
|
out += tail
|
|
return out, hascased
|
|
|
|
_CODEBITS = _sre.CODESIZE * 8
|
|
MAXCODE = (1 << _CODEBITS) - 1
|
|
_BITS_TRANS = b'0' + b'1' * 255
|
|
def _mk_bitmap(bits, _CODEBITS=_CODEBITS, _int=int):
|
|
s = bits.translate(_BITS_TRANS)[::-1]
|
|
return [_int(s[i - _CODEBITS: i], 2)
|
|
for i in range(len(s), 0, -_CODEBITS)]
|
|
|
|
def _bytes_to_codes(b):
|
|
# Convert block indices to word array
|
|
a = memoryview(b).cast('I')
|
|
assert a.itemsize == _sre.CODESIZE
|
|
assert len(a) * a.itemsize == len(b)
|
|
return a.tolist()
|
|
|
|
def _simple(p):
|
|
# check if this subpattern is a "simple" operator
|
|
if len(p) != 1:
|
|
return False
|
|
op, av = p[0]
|
|
if op is SUBPATTERN:
|
|
return av[0] is None and _simple(av[-1])
|
|
return op in _UNIT_CODES
|
|
|
|
def _generate_overlap_table(prefix):
|
|
"""
|
|
Generate an overlap table for the following prefix.
|
|
An overlap table is a table of the same size as the prefix which
|
|
informs about the potential self-overlap for each index in the prefix:
|
|
- if overlap[i] == 0, prefix[i:] can't overlap prefix[0:...]
|
|
- if overlap[i] == k with 0 < k <= i, prefix[i-k+1:i+1] overlaps with
|
|
prefix[0:k]
|
|
"""
|
|
table = [0] * len(prefix)
|
|
for i in range(1, len(prefix)):
|
|
idx = table[i - 1]
|
|
while prefix[i] != prefix[idx]:
|
|
if idx == 0:
|
|
table[i] = 0
|
|
break
|
|
idx = table[idx - 1]
|
|
else:
|
|
table[i] = idx + 1
|
|
return table
|
|
|
|
def _get_iscased(flags):
|
|
if not flags & SRE_FLAG_IGNORECASE:
|
|
return None
|
|
elif flags & SRE_FLAG_UNICODE:
|
|
return _sre.unicode_iscased
|
|
else:
|
|
return _sre.ascii_iscased
|
|
|
|
def _get_literal_prefix(pattern, flags):
|
|
# look for literal prefix
|
|
prefix = []
|
|
prefixappend = prefix.append
|
|
prefix_skip = None
|
|
iscased = _get_iscased(flags)
|
|
for op, av in pattern.data:
|
|
if op is LITERAL:
|
|
if iscased and iscased(av):
|
|
break
|
|
prefixappend(av)
|
|
elif op is SUBPATTERN:
|
|
group, add_flags, del_flags, p = av
|
|
flags1 = _combine_flags(flags, add_flags, del_flags)
|
|
if flags1 & SRE_FLAG_IGNORECASE and flags1 & SRE_FLAG_LOCALE:
|
|
break
|
|
prefix1, prefix_skip1, got_all = _get_literal_prefix(p, flags1)
|
|
if prefix_skip is None:
|
|
if group is not None:
|
|
prefix_skip = len(prefix)
|
|
elif prefix_skip1 is not None:
|
|
prefix_skip = len(prefix) + prefix_skip1
|
|
prefix.extend(prefix1)
|
|
if not got_all:
|
|
break
|
|
else:
|
|
break
|
|
else:
|
|
return prefix, prefix_skip, True
|
|
return prefix, prefix_skip, False
|
|
|
|
def _get_charset_prefix(pattern, flags):
|
|
while True:
|
|
if not pattern.data:
|
|
return None
|
|
op, av = pattern.data[0]
|
|
if op is not SUBPATTERN:
|
|
break
|
|
group, add_flags, del_flags, pattern = av
|
|
flags = _combine_flags(flags, add_flags, del_flags)
|
|
if flags & SRE_FLAG_IGNORECASE and flags & SRE_FLAG_LOCALE:
|
|
return None
|
|
|
|
iscased = _get_iscased(flags)
|
|
if op is LITERAL:
|
|
if iscased and iscased(av):
|
|
return None
|
|
return [(op, av)]
|
|
elif op is BRANCH:
|
|
charset = []
|
|
charsetappend = charset.append
|
|
for p in av[1]:
|
|
if not p:
|
|
return None
|
|
op, av = p[0]
|
|
if op is LITERAL and not (iscased and iscased(av)):
|
|
charsetappend((op, av))
|
|
else:
|
|
return None
|
|
return charset
|
|
elif op is IN:
|
|
charset = av
|
|
if iscased:
|
|
for op, av in charset:
|
|
if op is LITERAL:
|
|
if iscased(av):
|
|
return None
|
|
elif op is RANGE:
|
|
if av[1] > 0xffff:
|
|
return None
|
|
if any(map(iscased, range(av[0], av[1]+1))):
|
|
return None
|
|
return charset
|
|
return None
|
|
|
|
def _compile_info(code, pattern, flags):
|
|
# internal: compile an info block. in the current version,
|
|
# this contains min/max pattern width, and an optional literal
|
|
# prefix or a character map
|
|
lo, hi = pattern.getwidth()
|
|
if hi > MAXCODE:
|
|
hi = MAXCODE
|
|
if lo == 0:
|
|
code.extend([INFO, 4, 0, lo, hi])
|
|
return
|
|
# look for a literal prefix
|
|
prefix = []
|
|
prefix_skip = 0
|
|
charset = None # not used
|
|
if not (flags & SRE_FLAG_IGNORECASE and flags & SRE_FLAG_LOCALE):
|
|
# look for literal prefix
|
|
prefix, prefix_skip, got_all = _get_literal_prefix(pattern, flags)
|
|
# if no prefix, look for charset prefix
|
|
if not prefix:
|
|
charset = _get_charset_prefix(pattern, flags)
|
|
if charset:
|
|
charset, hascased = _optimize_charset(charset)
|
|
assert not hascased
|
|
if charset == _CHARSET_ALL:
|
|
charset = None
|
|
## if prefix:
|
|
## print("*** PREFIX", prefix, prefix_skip)
|
|
## if charset:
|
|
## print("*** CHARSET", charset)
|
|
# add an info block
|
|
emit = code.append
|
|
emit(INFO)
|
|
skip = len(code); emit(0)
|
|
# literal flag
|
|
mask = 0
|
|
if prefix:
|
|
mask = SRE_INFO_PREFIX
|
|
if prefix_skip is None and got_all:
|
|
mask = mask | SRE_INFO_LITERAL
|
|
elif charset:
|
|
mask = mask | SRE_INFO_CHARSET
|
|
emit(mask)
|
|
# pattern length
|
|
if lo < MAXCODE:
|
|
emit(lo)
|
|
else:
|
|
emit(MAXCODE)
|
|
prefix = prefix[:MAXCODE]
|
|
emit(hi)
|
|
# add literal prefix
|
|
if prefix:
|
|
emit(len(prefix)) # length
|
|
if prefix_skip is None:
|
|
prefix_skip = len(prefix)
|
|
emit(prefix_skip) # skip
|
|
code.extend(prefix)
|
|
# generate overlap table
|
|
code.extend(_generate_overlap_table(prefix))
|
|
elif charset:
|
|
_compile_charset(charset, flags, code)
|
|
code[skip] = len(code) - skip
|
|
|
|
def isstring(obj):
|
|
return isinstance(obj, (str, bytes))
|
|
|
|
def _code(p, flags):
|
|
|
|
flags = p.state.flags | flags
|
|
code = []
|
|
|
|
# compile info block
|
|
_compile_info(code, p, flags)
|
|
|
|
# compile the pattern
|
|
_compile(code, p.data, flags)
|
|
|
|
code.append(SUCCESS)
|
|
|
|
return code
|
|
|
|
def _hex_code(code):
|
|
return '[%s]' % ', '.join('%#0*x' % (_sre.CODESIZE*2+2, x) for x in code)
|
|
|
|
def dis(code):
|
|
import sys
|
|
|
|
labels = set()
|
|
level = 0
|
|
offset_width = len(str(len(code) - 1))
|
|
|
|
def dis_(start, end):
|
|
def print_(*args, to=None):
|
|
if to is not None:
|
|
labels.add(to)
|
|
args += ('(to %d)' % (to,),)
|
|
print('%*d%s ' % (offset_width, start, ':' if start in labels else '.'),
|
|
end=' '*(level-1))
|
|
print(*args)
|
|
|
|
def print_2(*args):
|
|
print(end=' '*(offset_width + 2*level))
|
|
print(*args)
|
|
|
|
nonlocal level
|
|
level += 1
|
|
i = start
|
|
while i < end:
|
|
start = i
|
|
op = code[i]
|
|
i += 1
|
|
op = OPCODES[op]
|
|
if op in (SUCCESS, FAILURE, ANY, ANY_ALL,
|
|
MAX_UNTIL, MIN_UNTIL, NEGATE):
|
|
print_(op)
|
|
elif op in (LITERAL, NOT_LITERAL,
|
|
LITERAL_IGNORE, NOT_LITERAL_IGNORE,
|
|
LITERAL_UNI_IGNORE, NOT_LITERAL_UNI_IGNORE,
|
|
LITERAL_LOC_IGNORE, NOT_LITERAL_LOC_IGNORE):
|
|
arg = code[i]
|
|
i += 1
|
|
print_(op, '%#02x (%r)' % (arg, chr(arg)))
|
|
elif op is AT:
|
|
arg = code[i]
|
|
i += 1
|
|
arg = str(ATCODES[arg])
|
|
assert arg[:3] == 'AT_'
|
|
print_(op, arg[3:])
|
|
elif op is CATEGORY:
|
|
arg = code[i]
|
|
i += 1
|
|
arg = str(CHCODES[arg])
|
|
assert arg[:9] == 'CATEGORY_'
|
|
print_(op, arg[9:])
|
|
elif op in (IN, IN_IGNORE, IN_UNI_IGNORE, IN_LOC_IGNORE):
|
|
skip = code[i]
|
|
print_(op, skip, to=i+skip)
|
|
dis_(i+1, i+skip)
|
|
i += skip
|
|
elif op in (RANGE, RANGE_UNI_IGNORE):
|
|
lo, hi = code[i: i+2]
|
|
i += 2
|
|
print_(op, '%#02x %#02x (%r-%r)' % (lo, hi, chr(lo), chr(hi)))
|
|
elif op is CHARSET:
|
|
print_(op, _hex_code(code[i: i + 256//_CODEBITS]))
|
|
i += 256//_CODEBITS
|
|
elif op is BIGCHARSET:
|
|
arg = code[i]
|
|
i += 1
|
|
mapping = list(b''.join(x.to_bytes(_sre.CODESIZE, sys.byteorder)
|
|
for x in code[i: i + 256//_sre.CODESIZE]))
|
|
print_(op, arg, mapping)
|
|
i += 256//_sre.CODESIZE
|
|
level += 1
|
|
for j in range(arg):
|
|
print_2(_hex_code(code[i: i + 256//_CODEBITS]))
|
|
i += 256//_CODEBITS
|
|
level -= 1
|
|
elif op in (MARK, GROUPREF, GROUPREF_IGNORE, GROUPREF_UNI_IGNORE,
|
|
GROUPREF_LOC_IGNORE):
|
|
arg = code[i]
|
|
i += 1
|
|
print_(op, arg)
|
|
elif op is JUMP:
|
|
skip = code[i]
|
|
print_(op, skip, to=i+skip)
|
|
i += 1
|
|
elif op is BRANCH:
|
|
skip = code[i]
|
|
print_(op, skip, to=i+skip)
|
|
while skip:
|
|
dis_(i+1, i+skip)
|
|
i += skip
|
|
start = i
|
|
skip = code[i]
|
|
if skip:
|
|
print_('branch', skip, to=i+skip)
|
|
else:
|
|
print_(FAILURE)
|
|
i += 1
|
|
elif op in (REPEAT, REPEAT_ONE, MIN_REPEAT_ONE,
|
|
POSSESSIVE_REPEAT, POSSESSIVE_REPEAT_ONE):
|
|
skip, min, max = code[i: i+3]
|
|
if max == MAXREPEAT:
|
|
max = 'MAXREPEAT'
|
|
print_(op, skip, min, max, to=i+skip)
|
|
dis_(i+3, i+skip)
|
|
i += skip
|
|
elif op is GROUPREF_EXISTS:
|
|
arg, skip = code[i: i+2]
|
|
print_(op, arg, skip, to=i+skip)
|
|
i += 2
|
|
elif op in (ASSERT, ASSERT_NOT):
|
|
skip, arg = code[i: i+2]
|
|
print_(op, skip, arg, to=i+skip)
|
|
dis_(i+2, i+skip)
|
|
i += skip
|
|
elif op is ATOMIC_GROUP:
|
|
skip = code[i]
|
|
print_(op, skip, to=i+skip)
|
|
dis_(i+1, i+skip)
|
|
i += skip
|
|
elif op is INFO:
|
|
skip, flags, min, max = code[i: i+4]
|
|
if max == MAXREPEAT:
|
|
max = 'MAXREPEAT'
|
|
print_(op, skip, bin(flags), min, max, to=i+skip)
|
|
start = i+4
|
|
if flags & SRE_INFO_PREFIX:
|
|
prefix_len, prefix_skip = code[i+4: i+6]
|
|
print_2(' prefix_skip', prefix_skip)
|
|
start = i + 6
|
|
prefix = code[start: start+prefix_len]
|
|
print_2(' prefix',
|
|
'[%s]' % ', '.join('%#02x' % x for x in prefix),
|
|
'(%r)' % ''.join(map(chr, prefix)))
|
|
start += prefix_len
|
|
print_2(' overlap', code[start: start+prefix_len])
|
|
start += prefix_len
|
|
if flags & SRE_INFO_CHARSET:
|
|
level += 1
|
|
print_2('in')
|
|
dis_(start, i+skip)
|
|
level -= 1
|
|
i += skip
|
|
else:
|
|
raise ValueError(op)
|
|
|
|
level -= 1
|
|
|
|
dis_(0, len(code))
|
|
|
|
|
|
def compile(p, flags=0):
|
|
# internal: convert pattern list to internal format
|
|
|
|
if isstring(p):
|
|
pattern = p
|
|
p = _parser.parse(p, flags)
|
|
else:
|
|
pattern = None
|
|
|
|
code = _code(p, flags)
|
|
|
|
if flags & SRE_FLAG_DEBUG:
|
|
print()
|
|
dis(code)
|
|
|
|
# map in either direction
|
|
groupindex = p.state.groupdict
|
|
indexgroup = [None] * p.state.groups
|
|
for k, i in groupindex.items():
|
|
indexgroup[i] = k
|
|
|
|
return _sre.compile(
|
|
pattern, flags | p.state.flags, code,
|
|
p.state.groups-1,
|
|
groupindex, tuple(indexgroup)
|
|
)
|