def _write_macbinary_header(output, macbinary_header):
# Try to convert unicode filenames to MacRoman automatically
if macbinary_header.get('filename_script', SM_ROMAN) != SM_ROMAN:
raise NotImplementedError(
"Filename script other than MacRoman specified. " +
"Don't know how to encode scripts other than MacRoman.")
macbinary_header['filename'] = macbinary_header['filename'].encode('macroman')
# If datetime fields not specified, use the current datetime
if 'created' not in macbinary_header or 'modified' not in macbinary_header:
now_mac_timestamp = convert_local_to_mac_timestamp(time.time())
if 'created' not in macbinary_header:
macbinary_header['created'] = now_mac_timestamp
if 'modified' not in macbinary_header:
macbinary_header['modified'] = now_mac_timestamp
# Write the header
macbinary_header['header_crc'] = 0
write_structure(output, _MACBINARY_HEADER_MEMBERS, macbinary_header)
# Amend the header with the actual CRC
with save_stream_position(output):
offset_to_crc_member = offset_to_structure_member(
_MACBINARY_HEADER_MEMBERS, 'header_crc')
# Compute CRC of header
output.seek(0)
header_section_to_crc = output.read(offset_to_crc_member)
header_crc = _compute_macbinary_crc(header_section_to_crc)
# Write CRC to header
write_unsigned(output, 2, header_crc)
# Save CRC to MacBinary object in case the caller is interested
macbinary_header['header_crc'] = header_crc
def _write_alias_record_structure(output, alias_record):
write_structure(output, _ALIAS_RECORD_MEMBERS, alias_record, external_writers={
'write_extras': _write_extras
})
def _write_alias_record_structure(output, alias_record):
write_structure(output,
_ALIAS_RECORD_MEMBERS,
alias_record,
external_writers={'write_extras': _write_extras})
def _write_resource_reference(output, resource_reference):
write_structure(output, _RESOURCE_REFERENCE_MEMBERS, resource_reference)
def _write_resource_type(output, resource_type):
write_structure(output, _RESOURCE_TYPE_MEMBERS, resource_type)
def _write_resource_map_header(output, resource_map_header):
write_structure(output, _RESOURCE_MAP_HEADER_MEMBERS, resource_map_header)
def _write_resource_fork_header(output, resource_fork_header):
write_structure(output, _RESOURCE_FORK_HEADER_MEMBERS, resource_fork_header)