comparison mercurial/store.py @ 17570:f53a7b256ca6

store: optimze _auxencode() a bit by grouping the reserved names by length

This reduces perffncacheencode wall time on Windows 7 x64 for my netbeans clone
here from 4.3 to 4.0 (7% faster).

17569:e9af2134825c

        cmap[chr(x)] = chr(x).lower()
    return lambda s: "".join([cmap[c] for c in s])

lowerencode = _buildlowerencodefun()

_winreservednames = '''con prn aux nul
    com1 com2 com3 com4 com5 com6 com7 com8 com9
    lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9'''.split()
def _auxencode(path, dotencode):
    '''
    Encodes filenames containing names reserved by Windows or which end in
    period or space. Does not touch other single reserved characters c.
    Specifically, c in '\\:*?"<>|' or ord(c) <= 31 are *not* encoded here.

    '~20.foo'
    '''
    res = []
    for n in path.split('/'):
        if n:
            base = n.split('.')[0]
            if base and (base in _winreservednames):
                # encode third letter ('aux' -> 'au~78')
                ec = "~%02x" % ord(n[2])
                n = n[0:2] + ec + n[3:]
            if n[-1] in '. ':
                # encode last period or space ('foo...' -> 'foo..~2e')
                n = n[:-1] + "~%02x" % ord(n[-1])
            if dotencode and n[0] in '. ':
                n = "~%02x" % ord(n[0]) + n[1:]
        res.append(n)
    return '/'.join(res)

_maxstorepathlen = 120
_dirprefixlen = 8

17570:f53a7b256ca6

        cmap[chr(x)] = chr(x).lower()
    return lambda s: "".join([cmap[c] for c in s])

lowerencode = _buildlowerencodefun()

# Windows reserved names: con, prn, aux, nul, com1..com9, lpt1..lpt9
_winres3 = ('aux', 'con', 'prn', 'nul') # length 3
_winres4 = ('com', 'lpt')               # length 4 (with trailing 1..9)
def _auxencode(path, dotencode):
    '''
    Encodes filenames containing names reserved by Windows or which end in
    period or space. Does not touch other single reserved characters c.
    Specifically, c in '\\:*?"<>|' or ord(c) <= 31 are *not* encoded here.

    '~20.foo'
    '''
    res = []
    for n in path.split('/'):
        if n:
            if dotencode and n[0] in '. ':
                n = "~%02x" % ord(n[0]) + n[1:]
            else:
                l = n.find('.')
                if l == -1:
                    l = len(n)
                if ((l == 3 and n[:3] in _winres3) or
                    (l == 4 and n[3] <= '9' and n[3] >= '1'
                            and n[:3] in _winres4)):
                    # encode third letter ('aux' -> 'au~78')
                    ec = "~%02x" % ord(n[2])
                    n = n[0:2] + ec + n[3:]
            if n[-1] in '. ':
                # encode last period or space ('foo...' -> 'foo..~2e')
                n = n[:-1] + "~%02x" % ord(n[-1])
        res.append(n)
    return '/'.join(res)

_maxstorepathlen = 120
_dirprefixlen = 8