@Override
public int read(byte[] b, int off, int len) throws IOException {
// must return 0 for zero-length arrays
if (b.length == 0 || len == 0) {
return 0;
}
// will get an error from TSK if we try to read an empty file
if (this.length == 0) {
return -1;
}
if (position < length) {
// data remains to be read
final int lenToRead = (int) Math.min(len, length - position);
try {
final int lenRead = content.read(b, position, lenToRead);
if (lenRead == 0 || lenRead == -1) {
// error or no more bytes to read, report EOF
return -1;
} else {
position += lenRead;
return lenRead;
}
} catch (TskException ex) {
throw new IOException(ex);
}
} else {
// at end of file
return -1;
}
}
