public PDSInputStream(PDS pds, String member) throws IOException {
this.pds = pds;
if (pds == null || pds.data == null)
throw new IOException("PDS member " + member + " not found");
Object on = pds.directory.get(member);
if (on == null) throw new IOException("PDS member " + member + " not found");
left = ((PDSEntry) on).len;
savedPosition = pds.getFilePointer();
pds.seek((long) ((PDSEntry) on).loc);
}
public int read(byte[] b, int off, int len) throws IOException {
if (left <= 0) return -1;
if (left < len) len = left;
int n = pds.read(b, off, len);
left -= n;
return n;
}
public int read() throws IOException {
if (left <= 0) return -1;
else {
int c = pds.read();
left--;
return c;
}
}
public void close() throws IOException {
pds.seek(savedPosition);
}
