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package fat
type File struct {
chain *ClusterChain
dir *Directory
entry *DirectoryClusterEntry
}
func (f *File) Read(p []byte) (n int, err error) {
return f.chain.Read(p)
}
func (f *File) Write(p []byte) (n int, err error) {
lastByte := f.chain.writeOffset + uint32(len(p))
if lastByte > f.entry.fileSize {
// Increase the file size since we're writing past the end of the file
f.entry.fileSize = lastByte
// Write the entry out
if err := f.dir.dirCluster.WriteToDevice(f.dir.device, f.dir.fat); err != nil {
return 0, err
}
}
return f.chain.Write(p)
}
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