Examples with BerTag org.openmuc.jasn1.ber.BerTag used on opensource projects

Example 26 with BerTag

use of org.openmuc.jasn1.ber.BerTag in project jasn1 by openmuc.

the class SubjectDirectoryAttributes method decode.

public int decode(InputStream is, boolean withTag) throws IOException {
    int codeLength = 0;
    int subCodeLength = 0;
    BerTag berTag = new BerTag();
    if (withTag) {
        codeLength += tag.decodeAndCheck(is);
    }
    BerLength length = new BerLength();
    codeLength += length.decode(is);
    int totalLength = length.val;
    if (length.val == -1) {
        while (true) {
            subCodeLength += berTag.decode(is);
            if (berTag.tagNumber == 0 && berTag.tagClass == 0 && berTag.primitive == 0) {
                int nextByte = is.read();
                if (nextByte != 0) {
                    if (nextByte == -1) {
                        throw new EOFException("Unexpected end of input stream.");
                    }
                    throw new IOException("Decoded sequence has wrong end of contents octets");
                }
                codeLength += subCodeLength + 1;
                return codeLength;
            }
            Attribute element = new Attribute();
            subCodeLength += element.decode(is, false);
            seqOf.add(element);
        }
    }
    while (subCodeLength < totalLength) {
        Attribute element = new Attribute();
        subCodeLength += element.decode(is, true);
        seqOf.add(element);
    }
    if (subCodeLength != totalLength) {
        throw new IOException("Decoded SequenceOf or SetOf has wrong length. Expected " + totalLength + " but has " + subCodeLength);
    }
    codeLength += subCodeLength;
    return codeLength;
}