ch-commons-gsm/src/main/java/com/cloudhopper/commons/gsm/GsmUtil.java [173:186]:
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        if (shortMessage == null) {
            return null;
        }

        if (shortMessage.length == 0) {
            return shortMessage;
        }

        // the entire length of UDH is the first byte + the length
        int userDataHeaderLength = ByteUtil.decodeUnsigned(shortMessage[0]) + 1;

        // is there enough data?
        if (userDataHeaderLength > shortMessage.length) {
            throw new IllegalArgumentException("User data header length exceeds short message length [shortMessageLength=" + shortMessage.length + ", userDataHeaderLength=" + userDataHeaderLength + "]");
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ch-commons-gsm/src/main/java/com/cloudhopper/commons/gsm/GsmUtil.java [212:225]:
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        if (shortMessage == null) {
            return null;
        }

        if (shortMessage.length == 0) {
            return shortMessage;
        }

        // the entire length of UDH is the first byte + the length
        int userDataHeaderLength = ByteUtil.decodeUnsigned(shortMessage[0]) + 1;

        // is there enough data?
        if (userDataHeaderLength > shortMessage.length) {
            throw new IllegalArgumentException("User data header length exceeds short message length [shortMessageLength=" + shortMessage.length + ", userDataHeaderLength=" + userDataHeaderLength + "]");
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