idigi_callback_status_t iDigiFileSystem::app_process_file_lseek(idigi_file_lseek_request_t * const request_data,
idigi_file_lseek_response_t * const response_data)
{
idigi_callback_status_t status = idigi_callback_continue;
SdFile *file = (SdFile *) request_data->handle;
uint8_t result = 0;
switch(request_data->origin)
{
case IDIGI_SEEK_SET:
result = file->seekSet(request_data->offset);
break;
case IDIGI_SEEK_END:
if (request_data->offset != 0)
{
// not supported by underlying file-system implementation
response_data->error->error_status = idigi_file_invalid_parameter;
goto done;
}
result = file->seekEnd();
break;
case IDIGI_SEEK_CUR:
default:
result = file->seekCur(request_data->offset);
break;
}
if (result) // it's a boolean
response_data->offset = request_data->offset;
else
response_data->offset = 0;
APP_DEBUG("lseek offset %ld, origin %d returned %ld\n",
request_data->offset, request_data->origin, response_data->offset);
done:
return status;
}
