uint8_t read() {
if(!fp) return 0xff; //file not open
if(file_mode == mode::write) return 0xff; //reads not permitted
if(file_offset >= file_size) return 0xff; //cannot read past end of file
buffer_sync();
return buffer[(file_offset++) & buffer_mask];
}
void write(uint8_t data) {
if(!fp) return; //file not open
if(file_mode == mode::read) return; //writes not permitted
buffer_sync();
buffer[(file_offset++) & buffer_mask] = data;
buffer_dirty = true;
if(file_offset > file_size) file_size = file_offset;
}
Error fs_file_close(FileIndex file)
{
CheckB(file < FS_MAX_OPEN_DIRS);
CheckB(_file[file].initialized);
buffer_sync();
_file[file].initialized = false;
return success;
}
Error fs_dir_close(DirIndex dir)
{
CheckB(dir < FS_MAX_OPEN_DIRS);
CheckB(_directory[dir].initialized);
buffer_sync();
_directory[dir].initialized = false;
return success;
}
Error fs_file_sync(FileIndex file)
{
buffer_sync();
return success;
}
