def _write_resource_data_area_using_map(output, resource_map, resources_in_resource_data_area):
for resource in resources_in_resource_data_area:
resource_data = resource['data']
resource_data_length = len(resource_data)
write_unsigned(output, 4, resource_data_length)
output.write(resource_data)
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_extras(output, ignored, value):
extras = value
this_module = globals()
for extra in extras:
extra_content_output = BytesIO()
this_module['_write_' + extra.name + '_extra_content'](extra_content_output, extra.value)
extra_content = extra_content_output.getvalue()
extra_length = len(extra_content)
write_unsigned(output, 2, extra.type)
write_unsigned(output, 2, extra_length)
output.write(extra_content)
if extra_length & 0x1 == 1:
output.write(NULL_BYTE) # padding byte
def write_alias_record(output, alias_record):
if 'record_size' in alias_record:
_write_alias_record_structure(output, alias_record)
else:
alias_record['record_size'] = 0
# Write record, except for the 'record_size' field
start_offset = output.tell()
_write_alias_record_structure(output, alias_record)
end_offset = output.tell()
# Write the 'record_size' field
output.seek(start_offset + 4)
record_size = end_offset - start_offset
write_unsigned(output, 2, record_size)
output.seek(end_offset)
def _write_extras(output, ignored, value):
extras = value
this_module = globals()
for extra in extras:
extra_content_output = BytesIO()
this_module['_write_' + extra.name + '_extra_content'](
extra_content_output, extra.value)
extra_content = extra_content_output.getvalue()
extra_length = len(extra_content)
write_unsigned(output, 2, extra.type)
write_unsigned(output, 2, extra_length)
output.write(extra_content)
if extra_length & 0x1 == 1:
output.write(NULL_BYTE) # padding byte
def write_alias_record(output, alias_record):
if 'record_size' in alias_record:
_write_alias_record_structure(output, alias_record)
else:
alias_record['record_size'] = 0
# Write record, except for the 'record_size' field
start_offset = output.tell()
_write_alias_record_structure(output, alias_record)
end_offset = output.tell()
# Write the 'record_size' field
output.seek(start_offset + 4)
record_size = end_offset - start_offset
write_unsigned(output, 2, record_size)
output.seek(end_offset)
def _write_directory_ids_extra_content(output, extra_value):
for path_id in extra_value:
write_unsigned(output, 4, path_id)
def _write_directory_ids_extra_content(output, extra_value):
for path_id in extra_value:
write_unsigned(output, 4, path_id)