def fromvalidatedwalker(cls, w, **kwArgs):
"""
Like fromwalker(), this method returns a new OS_2. However, it also
does extensive validation via the logging module (the client should
have done a logging.basicConfig call prior to calling this method,
unless a logger is passed in via the 'logger' keyword argument).
"""
logger = kwArgs.get('logger', None)
assert logger is not None # we're only called via factory
logger.debug(
('V0001', (w.length(), ), "Walker has %d remaining bytes."))
if w.length() < 68:
logger.error(('E2127', (), "Insufficient bytes"))
return None
ver = w.unpack("H")
if ver != 0:
logger.error(('V0002', (), "Expected version 0"))
return None
v = [ver]
okToReturn = True
v.extend(w.unpack("H2h"))
obj = typeflags_v0.TypeFlags.fromvalidatedwalker(w, **kwArgs)
if obj is None:
okToReturn = False
v.append(obj)
v.extend(w.unpack("10hH"))
obj = panose.Panose_validated(w, os2panver=0, **kwArgs)
if obj is None:
okToReturn = False
v.append(obj)
v.append(w.unpack("16x4s"))
obj = selection_v0.Selection.fromvalidatedwalker(w, **kwArgs)
if obj is None:
okToReturn = False
v.append(obj)
v.extend(w.unpack("2H"))
return (cls(*v) if okToReturn else None)
def fromvalidatedwalker(cls, w, **kwArgs):
"""
Like fromwalker(), this method returns a new OS_2. However, it also
does extensive validation via the logging module (the client should
have done a logging.basicConfig call prior to calling this method,
unless a logger is passed in via the 'logger' keyword argument).
"""
logger = kwArgs.get('logger', None)
assert logger is not None # we're only called via factory
logger.debug(
('V0001', (w.length(), ), "Walker has %d remaining bytes."))
if w.length() < 100:
logger.error(('E2127', (), "Insufficient bytes"))
return None
ver = w.unpack("H")
if ver != 5:
logger.error(('V0002', (), "Expected version 5"))
return None
v = [ver]
okToReturn = True
v.extend(w.unpack("H2h"))
v.append(typeflags_v3.TypeFlags.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("10hH"))
v.append(panose.Panose_validated(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.append(
unicoderanges_v4.UnicodeRanges.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.append(w.unpack("4s"))
v.append(selection_v4.Selection.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("2H3h2H"))
v.append(
codepageranges_v2.CodePageRanges.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("2h3H"))
v.extend(n / 20 for n in w.unpack("2H"))
return (cls(*v) if okToReturn else None)
def fromvalidatedwalker(cls, w, **kwArgs):
r"""
Like fromwalker(), this method returns a new OS_2. However, it also
does extensive validation via the logging module (the client should
have done a logging.basicConfig call prior to calling this method,
unless a logger is passed in via the 'logger' keyword argument).
>>> fvw = OS_2.fromvalidatedbytes
>>> logger = utilities.makeDoctestLogger("OS/2")
>>> s = _testingValues[1].binaryString()
>>> obj = fvw(s, logger=logger)
OS/2 - DEBUG - Walker has 96 remaining bytes.
>>> sbad = s[0:62] + b'\x12\x02' + s[64:] # bad fsSelection
>>> obj = fvw(sbad, logger=logger)
OS/2 - DEBUG - Walker has 96 remaining bytes.
OS/2.fsselection - ERROR - All reserved bits should be set to 0, but some are 1.
"""
logger = kwArgs.get('logger', None)
assert logger is not None # we're only called via factory
logger.debug(
('V0001', (w.length(), ), "Walker has %d remaining bytes."))
if w.length() < 96:
logger.error(('E2127', (), "Insufficient bytes"))
return None
ver = w.unpack("H")
if ver != 4:
logger.error(('V0002', (), "Expected version 4"))
return None
v = [ver]
okToReturn = True
v.extend(w.unpack("H2h"))
v.append(typeflags_v3.TypeFlags.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("10hH"))
v.append(panose.Panose_validated(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.append(
unicoderanges_v4.UnicodeRanges.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.append(w.unpack("4s"))
v.append(selection_v4.Selection.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("2H3h2H"))
v.append(
codepageranges_v2.CodePageRanges.fromvalidatedwalker(w, **kwArgs))
if v[-1] is None:
okToReturn = False
v.extend(w.unpack("2h3H"))
return (cls(*v) if okToReturn else None)