public int totalBytesUnread() {
int total = 0;
if (readMode == ReadMode.REMOVE_AFTER_READING) {
total = totalBytesUnreadInList;
} else if (readMode == ReadMode.RETAIN_AFTER_READING) {
prepareRetainAfterReading();
total = totalBytesUnreadInIterator;
}
if (currentReadChunk != null) {
total += currentReadChunk.bytesUnread();
}
if (currentWriteChunk != currentReadChunk && currentWriteChunk != null) {
if (readMode == ReadMode.REMOVE_AFTER_READING) {
total += currentWriteChunk.bytesUnread();
} else if (readMode == ReadMode.RETAIN_AFTER_READING) {
total += currentWriteChunk.bytesUsed();
}
}
return total;
}
