// Copies data from req.Data to the File's data array beginning at index req.Offset.
// Grows file.data if necessary.
func (file *File) Write(req *fuse.WriteRequest, resp *fuse.WriteResponse, intr fs.Intr) fuse.Error {
filesystem.Lock(file)
defer filesystem.Unlock(file)
util.P_out(req.String())
writeSize := len(req.Data)
size := uint64(req.Offset) + uint64(writeSize)
if size < file.Attr().Size {
size = file.Attr().Size
}
if size > uint64(cap(file.data)) {
tmp := file.data
file.data = make([]byte, size, size*2)
copy(file.data, tmp)
} else {
file.data = file.data[:size]
}
copy(file.data[req.Offset:], req.Data)
resp.Size = writeSize
file.Attrs.Size = uint64(size)
file.Attrs.Mtime = time.Now()
file.dirty = true
return nil
}
