def __fill_missing(self, fileobj):
"""Raises IOError and apev2.error"""
fileobj.seek(self.metadata + 8)
data = fileobj.read(16)
if len(data) != 16:
raise error
self.version = data[:4]
self.size = cdata.uint32_le(data[4:8])
self.items = cdata.uint32_le(data[8:12])
self.flags = cdata.uint32_le(data[12:])
if self.header is not None:
self.data = self.header + 32
# If we're reading the header, the size is the header
# offset + the size, which includes the footer.
self.end = self.data + self.size
fileobj.seek(self.end - 32, 0)
if fileobj.read(8) == b"APETAGEX":
self.footer = self.end - 32
elif self.footer is not None:
self.end = self.footer + 32
self.data = self.end - self.size
if self.flags & HAS_HEADER:
self.header = self.data - 32
else:
self.header = self.data
else:
raise APENoHeaderError("No APE tag found")
# exclude the footer from size
if self.footer is not None:
self.size -= 32
def __fill_missing(self, fileobj):
"""Raises IOError and apev2.error"""
fileobj.seek(self.metadata + 8)
data = fileobj.read(16)
if len(data) != 16:
raise error
self.version = data[:4]
self.size = cdata.uint32_le(data[4:8])
self.items = cdata.uint32_le(data[8:12])
self.flags = cdata.uint32_le(data[12:])
if self.header is not None:
self.data = self.header + 32
# If we're reading the header, the size is the header
# offset + the size, which includes the footer.
self.end = self.data + self.size
fileobj.seek(self.end - 32, 0)
if fileobj.read(8) == b"APETAGEX":
self.footer = self.end - 32
elif self.footer is not None:
self.end = self.footer + 32
self.data = self.end - self.size
if self.flags & HAS_HEADER:
self.header = self.data - 32
else:
self.header = self.data
else:
raise APENoHeaderError("No APE tag found")
# exclude the footer from size
if self.footer is not None:
self.size -= 32
def __parse_tag(self, tag, count):
"""Raises IOError and APEBadItemError"""
fileobj = cBytesIO(tag)
for i in xrange(count):
tag_data = fileobj.read(8)
# someone writes wrong item counts
if not tag_data:
break
if len(tag_data) != 8:
raise error
size = cdata.uint32_le(tag_data[:4])
flags = cdata.uint32_le(tag_data[4:8])
# Bits 1 and 2 bits are flags, 0-3
# Bit 0 is read/write flag, ignored
kind = (flags & 6) >> 1
if kind == 3:
raise APEBadItemError("value type must be 0, 1, or 2")
key = value = fileobj.read(1)
if not key:
raise APEBadItemError
while key[-1:] != b'\x00' and value:
value = fileobj.read(1)
if not value:
raise APEBadItemError
key += value
if key[-1:] == b"\x00":
key = key[:-1]
if PY3:
try:
key = key.decode("ascii")
except UnicodeError as err:
reraise(APEBadItemError, err, sys.exc_info()[2])
value = fileobj.read(size)
if len(value) != size:
raise APEBadItemError
value = _get_value_type(kind)._new(value)
self[key] = value
def __parse_tag(self, tag, count):
"""Raises IOError and APEBadItemError"""
fileobj = cBytesIO(tag)
for i in xrange(count):
tag_data = fileobj.read(8)
# someone writes wrong item counts
if not tag_data:
break
if len(tag_data) != 8:
raise error
size = cdata.uint32_le(tag_data[:4])
flags = cdata.uint32_le(tag_data[4:8])
# Bits 1 and 2 bits are flags, 0-3
# Bit 0 is read/write flag, ignored
kind = (flags & 6) >> 1
if kind == 3:
raise APEBadItemError("value type must be 0, 1, or 2")
key = value = fileobj.read(1)
if not key:
raise APEBadItemError
while key[-1:] != b'\x00' and value:
value = fileobj.read(1)
if not value:
raise APEBadItemError
key += value
if key[-1:] == b"\x00":
key = key[:-1]
if PY3:
try:
key = key.decode("ascii")
except UnicodeError as err:
reraise(APEBadItemError, err, sys.exc_info()[2])
value = fileobj.read(size)
if len(value) != size:
raise APEBadItemError
value = _get_value_type(kind)._new(value)
self[key] = value
