Utils.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2012-2014
 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4chee.storage.conf;


/**
 * @author Gunter Zeilinger<gunterze@gmail.com>
 *
 */
class Utils {
    private static final String PREFIX = "kKMGTP";
    private static final int kB = 1000;
    private static final int KiB = 1024;

    public static long parseByteSize(String s) {
        try {
            int len = s.length();
            char prefix = s.charAt(--len);
            if (prefix == 'B')
                prefix = s.charAt(--len);
            int base = kB;
            if (prefix == 'i') {
                base = KiB;
                prefix = s.charAt(--len);
            }
            int factor = PREFIX.indexOf(prefix);
            if (factor < 0)
                len++;
            else if (factor == 0)
                factor++;
            long value = Long.parseLong(s.substring(0, len));
            while (factor-- > 0)
                value *= base;
            return value;
        } catch (RuntimeException e) {
            throw new IllegalArgumentException(s, e);
        }
    }

}