src/share/native/sun/font/layout/ScriptAndLanguage.cpp

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

/*
 *
 *
 * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
 *
 */

#include "LETypes.h"
#include "OpenTypeTables.h"
#include "OpenTypeUtilities.h"
#include "ScriptAndLanguage.h"
#include "LESwaps.h"

U_NAMESPACE_BEGIN

const LangSysTable *ScriptTable::findLanguage(LETag languageTag, le_bool exactMatch) const
{
    le_uint16 count = SWAPW(langSysCount);
    Offset langSysTableOffset = exactMatch? 0 : SWAPW(defaultLangSysTableOffset);

    if (count > 0) {
        Offset foundOffset =
            OpenTypeUtilities::getTagOffset(languageTag, langSysRecordArray, count);

        if (foundOffset != 0) {
            langSysTableOffset = foundOffset;
        }
    }

    if (langSysTableOffset != 0) {
        return (const LangSysTable *) ((char *)this + langSysTableOffset);
    }

    return 0;
}

const ScriptTable *ScriptListTable::findScript(LETag scriptTag) const
{
    le_uint16 count = SWAPW(scriptCount);
    Offset scriptTableOffset =
        OpenTypeUtilities::getTagOffset(scriptTag, scriptRecordArray, count);

    if (scriptTableOffset != 0) {
        return (const ScriptTable *) ((char *)this + scriptTableOffset);
    }

    return 0;
}

const LangSysTable *ScriptListTable::findLanguage(LETag scriptTag, LETag languageTag, le_bool exactMatch) const
{
    const ScriptTable *scriptTable = findScript(scriptTag);

    if (scriptTable == 0) {
        return 0;
    }

    return scriptTable->findLanguage(languageTag, exactMatch);
}

U_NAMESPACE_END