dp_version.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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#include <sal/config.h>

#include <rtl/ustring.hxx>

#include <dp_version.hxx>

namespace {

OUString getElement(OUString const & version, ::sal_Int32 * index)
{
    while (*index < version.getLength() && version[*index] == '0') {
        ++*index;
    }
    return version.getToken(0, '.', *index);
}

}

namespace dp_misc {

::dp_misc::Order compareVersions(
    OUString const & version1, OUString const & version2)
{
    for (::sal_Int32 i1 = 0, i2 = 0; i1 >= 0 || i2 >= 0;) {
        OUString e1(i1 >= 0 ? getElement(version1, &i1) : OUString());
        OUString e2(i2 >= 0 ? getElement(version2, &i2) : OUString());
        if (e1.getLength() < e2.getLength()) {
            return ::dp_misc::LESS;
        } else if (e1.getLength() > e2.getLength()) {
            return ::dp_misc::GREATER;
        } else if (e1 < e2) {
            return ::dp_misc::LESS;
        } else if (e1 > e2) {
            return ::dp_misc::GREATER;
        }
    }
    return ::dp_misc::EQUAL;
}


}

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