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ðŸ“„ bisect.py(2.53 KB)
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ðŸ“„ cProfile.py(6.21 KB)
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ðŸ“ collections
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ðŸ“ concurrent
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ðŸ“„ dummy_threading.py(2.75 KB)
ðŸ“ email
ðŸ“ encodings
ðŸ“„ filecmp.py(9.37 KB)
ðŸ“„ fileinput.py(13.92 KB)
ðŸ“„ fnmatch.py(3.09 KB)
ðŸ“„ formatter.py(14.58 KB)
ðŸ“„ fractions.py(22.49 KB)
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ðŸ“„ genericpath.py(3.02 KB)
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ðŸ“ html
ðŸ“ http
ðŸ“ idlelib
ðŸ“„ imaplib.py(48.94 KB)
ðŸ“„ imghdr.py(3.45 KB)
ðŸ“„ imp.py(9.5 KB)
ðŸ“ importlib
ðŸ“„ inspect.py(77.11 KB)
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ðŸ“„ ipaddress.py(68.66 KB)
ðŸ“ json
ðŸ“„ keyword.py(2.01 KB)
ðŸ“ lib-dynload
ðŸ“ lib2to3
ðŸ“„ linecache.py(3.77 KB)
ðŸ“„ locale.py(91.03 KB)
ðŸ“ logging
ðŸ“„ lzma.py(17.04 KB)
ðŸ“„ macpath.py(5.49 KB)
ðŸ“„ macurl2path.py(2.67 KB)
ðŸ“„ mailbox.py(77.24 KB)
ðŸ“„ mailcap.py(7.26 KB)
ðŸ“„ mimetypes.py(20.25 KB)
ðŸ“„ modulefinder.py(22.65 KB)
ðŸ“ multiprocessing
ðŸ“„ netrc.py(5.61 KB)
ðŸ“„ nntplib.py(41.78 KB)
ðŸ“„ ntpath.py(19.96 KB)
ðŸ“„ nturl2path.py(2.34 KB)
ðŸ“„ numbers.py(10.15 KB)
ðŸ“„ opcode.py(4.98 KB)
ðŸ“„ optparse.py(58.93 KB)
ðŸ“„ os.py(33.96 KB)
ðŸ“„ os2emxpath.py(4.55 KB)
ðŸ“„ pdb.py(59.23 KB)
ðŸ“„ pickle.py(46.74 KB)
ðŸ“„ pickletools.py(79.44 KB)
ðŸ“„ pipes.py(8.71 KB)
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ðŸ“ plat-linux
ðŸ“„ platform.py(49.55 KB)
ðŸ“„ plistlib.py(14.43 KB)
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ðŸ“„ py_compile.py(6.56 KB)
ðŸ“„ pyclbr.py(13.12 KB)
ðŸ“„ pydoc.py(99.26 KB)
ðŸ“ pydoc_data
ðŸ“„ queue.py(8.63 KB)
ðŸ“„ quopri.py(7.14 KB)
ðŸ“„ random.py(25.06 KB)
ðŸ“„ re.py(14.62 KB)
ðŸ“„ reprlib.py(4.99 KB)
ðŸ“„ rlcompleter.py(5.4 KB)
ðŸ“„ runpy.py(10.17 KB)
ðŸ“„ sched.py(6.25 KB)
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ðŸ“ site-packages
ðŸ“„ site.py(21.46 KB)
ðŸ“„ smtpd.py(29.5 KB)
ðŸ“„ smtplib.py(37.13 KB)
ðŸ“„ sndhdr.py(6.07 KB)
ðŸ“„ socket.py(14.56 KB)
ðŸ“„ socketserver.py(23.63 KB)
ðŸ“ sqlite3
ðŸ“„ sre_compile.py(15.96 KB)
ðŸ“„ sre_constants.py(7.06 KB)
ðŸ“„ sre_parse.py(29.5 KB)
ðŸ“„ ssl.py(23.9 KB)
ðŸ“„ stat.py(4.2 KB)
ðŸ“„ string.py(9.19 KB)
ðŸ“„ stringprep.py(12.61 KB)
ðŸ“„ struct.py(238 B)
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ðŸ“„ symbol.py(2 KB)
ðŸ“„ symtable.py(7.21 KB)
ðŸ“„ sysconfig.py(24.58 KB)
ðŸ“„ tabnanny.py(11.14 KB)
ðŸ“„ tarfile.py(86.78 KB)
ðŸ“„ telnetlib.py(26.71 KB)
ðŸ“„ tempfile.py(22.47 KB)
ðŸ“ test
ðŸ“„ textwrap.py(16.1 KB)
ðŸ“„ this.py(1003 B)
ðŸ“„ threading.py(44.57 KB)
ðŸ“„ timeit.py(12.1 KB)
ðŸ“„ token.py(2.96 KB)
ðŸ“„ tokenize.py(24.29 KB)
ðŸ“„ trace.py(30.75 KB)
ðŸ“„ traceback.py(11.7 KB)
ðŸ“„ tty.py(879 B)
ðŸ“„ types.py(3.09 KB)
ðŸ“ unittest
ðŸ“ urllib
ðŸ“„ uu.py(6.61 KB)
ðŸ“„ uuid.py(21.83 KB)
ðŸ“ venv
ðŸ“„ warnings.py(13.5 KB)
ðŸ“„ wave.py(18.14 KB)
ðŸ“„ weakref.py(11.23 KB)
ðŸ“„ webbrowser.py(22.38 KB)
ðŸ“ wsgiref
ðŸ“„ xdrlib.py(5.25 KB)
ðŸ“ xml
ðŸ“ xmlrpc
ðŸ“„ zipfile.py(64.87 KB)

Editing: sre_compile.py

#
# Secret Labs' Regular Expression Engine
#
# convert template to internal format
#
# Copyright (c) 1997-2001 by Secret Labs AB.  All rights reserved.
#
# See the sre.py file for information on usage and redistribution.
#

"""Internal support module for sre"""

import _sre, sys
import sre_parse
from sre_constants import *

assert _sre.MAGIC == MAGIC, "SRE module mismatch"

if _sre.CODESIZE == 2:
    MAXCODE = 65535
else:
    MAXCODE = 0xFFFFFFFF

def _identityfunction(x):
    return x

_LITERAL_CODES = set([LITERAL, NOT_LITERAL])
_REPEATING_CODES = set([REPEAT, MIN_REPEAT, MAX_REPEAT])
_SUCCESS_CODES = set([SUCCESS, FAILURE])
_ASSERT_CODES = set([ASSERT, ASSERT_NOT])

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
    for op, av in pattern:
        if op in LITERAL_CODES:
            if flags & SRE_FLAG_IGNORECASE:
                emit(OPCODES[OP_IGNORE[op]])
                emit(_sre.getlower(av, flags))
            else:
                emit(OPCODES[op])
                emit(av)
        elif op is IN:
            if flags & SRE_FLAG_IGNORECASE:
                emit(OPCODES[OP_IGNORE[op]])
                def fixup(literal, flags=flags):
                    return _sre.getlower(literal, flags)
            else:
                emit(OPCODES[op])
                fixup = _identityfunction
            skip = _len(code); emit(0)
            _compile_charset(av, flags, code, fixup)
            code[skip] = _len(code) - skip
        elif op is ANY:
            if flags & SRE_FLAG_DOTALL:
                emit(OPCODES[ANY_ALL])
            else:
                emit(OPCODES[ANY])
        elif op in REPEATING_CODES:
            if flags & SRE_FLAG_TEMPLATE:
                raise error("internal: unsupported template operator")
                emit(OPCODES[REPEAT])
                skip = _len(code); emit(0)
                emit(av[0])
                emit(av[1])
                _compile(code, av[2], flags)
                emit(OPCODES[SUCCESS])
                code[skip] = _len(code) - skip
            elif _simple(av) and op is not REPEAT:
                if op is MAX_REPEAT:
                    emit(OPCODES[REPEAT_ONE])
                else:
                    emit(OPCODES[MIN_REPEAT_ONE])
                skip = _len(code); emit(0)
                emit(av[0])
                emit(av[1])
                _compile(code, av[2], flags)
                emit(OPCODES[SUCCESS])
                code[skip] = _len(code) - skip
            else:
                emit(OPCODES[REPEAT])
                skip = _len(code); emit(0)
                emit(av[0])
                emit(av[1])
                _compile(code, av[2], flags)
                code[skip] = _len(code) - skip
                if op is MAX_REPEAT:
                    emit(OPCODES[MAX_UNTIL])
                else:
                    emit(OPCODES[MIN_UNTIL])
        elif op is SUBPATTERN:
            if av[0]:
                emit(OPCODES[MARK])
                emit((av[0]-1)*2)
            # _compile_info(code, av[1], flags)
            _compile(code, av[1], flags)
            if av[0]:
                emit(OPCODES[MARK])
                emit((av[0]-1)*2+1)
        elif op in SUCCESS_CODES:
            emit(OPCODES[op])
        elif op in ASSERT_CODES:
            emit(OPCODES[op])
            skip = _len(code); emit(0)
            if av[0] >= 0:
                emit(0) # look ahead
            else:
                lo, hi = av[1].getwidth()
                if lo != hi:
                    raise error("look-behind requires fixed-width pattern")
                emit(lo) # look behind
            _compile(code, av[1], flags)
            emit(OPCODES[SUCCESS])
            code[skip] = _len(code) - skip
        elif op is CALL:
            emit(OPCODES[op])
            skip = _len(code); emit(0)
            _compile(code, av, flags)
            emit(OPCODES[SUCCESS])
            code[skip] = _len(code) - skip
        elif op is AT:
            emit(OPCODES[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(ATCODES[av])
        elif op is BRANCH:
            emit(OPCODES[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(OPCODES[JUMP])
                tailappend(_len(code)); emit(0)
                code[skip] = _len(code) - skip
            emit(0) # end of branch
            for tail in tail:
                code[tail] = _len(code) - tail
        elif op is CATEGORY:
            emit(OPCODES[op])
            if flags & SRE_FLAG_LOCALE:
                av = CH_LOCALE[av]
            elif flags & SRE_FLAG_UNICODE:
                av = CH_UNICODE[av]
            emit(CHCODES[av])
        elif op is GROUPREF:
            if flags & SRE_FLAG_IGNORECASE:
                emit(OPCODES[OP_IGNORE[op]])
            else:
                emit(OPCODES[op])
            emit(av-1)
        elif op is GROUPREF_EXISTS:
            emit(OPCODES[op])
            emit(av[0]-1)
            skipyes = _len(code); emit(0)
            _compile(code, av[1], flags)
            if av[2]:
                emit(OPCODES[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 ValueError("unsupported operand type", op)

def _compile_charset(charset, flags, code, fixup=None):
    # compile charset subprogram
    emit = code.append
    if fixup is None:
        fixup = _identityfunction
    for op, av in _optimize_charset(charset, fixup):
        emit(OPCODES[op])
        if op is NEGATE:
            pass
        elif op is LITERAL:
            emit(fixup(av))
        elif op is RANGE:
            emit(fixup(av[0]))
            emit(fixup(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(CHCODES[CH_LOCALE[av]])
            elif flags & SRE_FLAG_UNICODE:
                emit(CHCODES[CH_UNICODE[av]])
            else:
                emit(CHCODES[av])
        else:
            raise error("internal: unsupported set operator")
    emit(OPCODES[FAILURE])

def _optimize_charset(charset, fixup):
    # internal: optimize character set
    out = []
    outappend = out.append
    charmap = [0]*256
    try:
        for op, av in charset:
            if op is NEGATE:
                outappend((op, av))
            elif op is LITERAL:
                charmap[fixup(av)] = 1
            elif op is RANGE:
                for i in range(fixup(av[0]), fixup(av[1])+1):
                    charmap[i] = 1
            elif op is CATEGORY:
                # XXX: could append to charmap tail
                return charset # cannot compress
    except IndexError:
        # character set contains unicode characters
        return _optimize_unicode(charset, fixup)
    # compress character map
    i = p = n = 0
    runs = []
    runsappend = runs.append
    for c in charmap:
        if c:
            if n == 0:
                p = i
            n = n + 1
        elif n:
            runsappend((p, n))
            n = 0
        i = i + 1
    if n:
        runsappend((p, n))
    if len(runs) <= 2:
        # use literal/range
        for p, n in runs:
            if n == 1:
                outappend((LITERAL, p))
            else:
                outappend((RANGE, (p, p+n-1)))
        if len(out) < len(charset):
            return out
    else:
        # use bitmap
        data = _mk_bitmap(charmap)
        outappend((CHARSET, data))
        return out
    return charset

def _mk_bitmap(bits):
    data = []
    dataappend = data.append
    if _sre.CODESIZE == 2:
        start = (1, 0)
    else:
        start = (1, 0)
    m, v = start
    for c in bits:
        if c:
            v = v + m
        m = m + m
        if m > MAXCODE:
            dataappend(v)
            m, v = start
    return data

# 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).

# The BIGCHARSET opcode still supports only subsets
# of the basic multilingual plane; an efficient representation
# for all of Unicode has not yet been developed. This means,
# in particular, that negated charsets cannot be represented as
# bigcharsets.

def _optimize_unicode(charset, fixup):
    try:
        import array
    except ImportError:
        return charset
    charmap = [0]*65536
    negate = 0
    try:
        for op, av in charset:
            if op is NEGATE:
                negate = 1
            elif op is LITERAL:
                charmap[fixup(av)] = 1
            elif op is RANGE:
                for i in range(fixup(av[0]), fixup(av[1])+1):
                    charmap[i] = 1
            elif op is CATEGORY:
                # XXX: could expand category
                return charset # cannot compress
    except IndexError:
        # non-BMP characters; XXX now they should work
        return charset
    if negate:
        if sys.maxunicode != 65535:
            # XXX: negation does not work with big charsets
            # XXX2: now they should work, but removing this will make the
            # charmap 17 times bigger
            return charset
        for i in range(65536):
            charmap[i] = not charmap[i]
    comps = {}
    mapping = [0]*256
    block = 0
    data = []
    for i in range(256):
        chunk = tuple(charmap[i*256:(i+1)*256])
        new = comps.setdefault(chunk, block)
        mapping[i] = new
        if new == block:
            block = block + 1
            data = data + _mk_bitmap(chunk)
    header = [block]
    if _sre.CODESIZE == 2:
        code = 'H'
    else:
        code = 'I'
    # Convert block indices to byte array of 256 bytes
    mapping = array.array('B', mapping).tobytes()
    # Convert byte array to word array
    mapping = array.array(code, mapping)
    assert mapping.itemsize == _sre.CODESIZE
    assert len(mapping) * mapping.itemsize == 256
    header = header + mapping.tolist()
    data[0:0] = header
    return [(BIGCHARSET, data)]

def _simple(av):
    # check if av is a "simple" operator
    lo, hi = av[2].getwidth()
    return lo == hi == 1 and av[2][0][0] != SUBPATTERN

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 lo == 0:
        return # not worth it
    # look for a literal prefix
    prefix = []
    prefixappend = prefix.append
    prefix_skip = 0
    charset = [] # not used
    charsetappend = charset.append
    if not (flags & SRE_FLAG_IGNORECASE):
        # look for literal prefix
        for op, av in pattern.data:
            if op is LITERAL:
                if len(prefix) == prefix_skip:
                    prefix_skip = prefix_skip + 1
                prefixappend(av)
            elif op is SUBPATTERN and len(av[1]) == 1:
                op, av = av[1][0]
                if op is LITERAL:
                    prefixappend(av)
                else:
                    break
            else:
                break
        # if no prefix, look for charset prefix
        if not prefix and pattern.data:
            op, av = pattern.data[0]
            if op is SUBPATTERN and av[1]:
                op, av = av[1][0]
                if op is LITERAL:
                    charsetappend((op, av))
                elif op is BRANCH:
                    c = []
                    cappend = c.append
                    for p in av[1]:
                        if not p:
                            break
                        op, av = p[0]
                        if op is LITERAL:
                            cappend((op, av))
                        else:
                            break
                    else:
                        charset = c
            elif op is BRANCH:
                c = []
                cappend = c.append
                for p in av[1]:
                    if not p:
                        break
                    op, av = p[0]
                    if op is LITERAL:
                        cappend((op, av))
                    else:
                        break
                else:
                    charset = c
            elif op is IN:
                charset = av
##     if prefix:
##         print "*** PREFIX", prefix, prefix_skip
##     if charset:
##         print "*** CHARSET", charset
    # add an info block
    emit = code.append
    emit(OPCODES[INFO])
    skip = len(code); emit(0)
    # literal flag
    mask = 0
    if prefix:
        mask = SRE_INFO_PREFIX
        if len(prefix) == prefix_skip == len(pattern.data):
            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]
    if hi < MAXCODE:
        emit(hi)
    else:
        emit(0)
    # add literal prefix
    if prefix:
        emit(len(prefix)) # length
        emit(prefix_skip) # skip
        code.extend(prefix)
        # generate overlap table
        table = [-1] + ([0]*len(prefix))
        for i in range(len(prefix)):
            table[i+1] = table[i]+1
            while table[i+1] > 0 and prefix[i] != prefix[table[i+1]-1]:
                table[i+1] = table[table[i+1]-1]+1
        code.extend(table[1:]) # don't store first entry
    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.pattern.flags | flags
    code = []

# compile info block
    _compile_info(code, p, flags)

# compile the pattern
    _compile(code, p.data, flags)

code.append(OPCODES[SUCCESS])

return code

def compile(p, flags=0):
    # internal: convert pattern list to internal format

if isstring(p):
        pattern = p
        p = sre_parse.parse(p, flags)
    else:
        pattern = None

code = _code(p, flags)

# print code

# XXX: <fl> get rid of this limitation!
    if p.pattern.groups > 100:
        raise AssertionError(
            "sorry, but this version only supports 100 named groups"
            )

# map in either direction
    groupindex = p.pattern.groupdict
    indexgroup = [None] * p.pattern.groups
    for k, i in groupindex.items():
        indexgroup[i] = k

return _sre.compile(
        pattern, flags | p.pattern.flags, code,
        p.pattern.groups-1,
        groupindex, indexgroup
        )

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