/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * 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

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <sal/config.h>

#include <o3tl/safeint.hxx>

#include <rtl/textcvt.h>

#include <sal/types.h>

#include "converter.hxx"

#include "tenchelp.hxx"

#include "unichars.hxx"

sal::detail::textenc::BadInputConversionAction

sal::detail::textenc::handleBadInputTextToUnicodeConversion(

    bool bUndefined, bool bMultiByte, char cByte, sal_uInt32 nFlags,

    sal_Unicode ** pDestBufPtr, const sal_Unicode * pDestBufEnd, sal_uInt32 * pInfo)

{

    *pInfo |= bUndefined

        ? (bMultiByte

           ? RTL_TEXTTOUNICODE_INFO_MBUNDEFINED

           : RTL_TEXTTOUNICODE_INFO_UNDEFINED)

        : RTL_TEXTTOUNICODE_INFO_INVALID;

    switch (nFlags

            & (bUndefined

               ? (bMultiByte

                  ? RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK

                  : RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MASK)

               : RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK))

    {

    case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR:

    case RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR:

    case RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR:

        *pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;

        return BAD_INPUT_STOP;

    case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_IGNORE:

    case RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_IGNORE:

    case RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE:

        return BAD_INPUT_CONTINUE;

    case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MAPTOPRIVATE:

        if (*pDestBufPtr != pDestBufEnd)

        {

            *(*pDestBufPtr)++ = RTL_TEXTCVT_BYTE_PRIVATE_START

                | static_cast<unsigned char>(cByte);

            return BAD_INPUT_CONTINUE;

        }

        else

            return BAD_INPUT_NO_OUTPUT;

    default: // RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_DEFAULT,

             // RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_DEFAULT,

             // RTL_TEXTTOUNICODE_FLAGS_INVALID_DEFAULT

        if (*pDestBufPtr != pDestBufEnd)

        {

            *(*pDestBufPtr)++ = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;

            return BAD_INPUT_CONTINUE;

        }

        else

            return BAD_INPUT_NO_OUTPUT;

    }

}

sal::detail::textenc::BadInputConversionAction

sal::detail::textenc::handleBadInputUnicodeToTextConversion(

    bool bUndefined, sal_uInt32 nUtf32, sal_uInt32 nFlags, char ** pDestBufPtr,

    const char * pDestBufEnd, sal_uInt32 * pInfo, char const * pPrefix,

    sal_Size nPrefixLen, bool * pPrefixWritten)

{

    // TODO! RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACE

    // RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACESTR

    char cReplace;

    if (bUndefined)

    {

        if (ImplIsControlOrFormat(nUtf32))

        {

            if ((nFlags & RTL_UNICODETOTEXT_FLAGS_CONTROL_IGNORE) != 0)

                nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;

        }

        else if (ImplIsPrivateUse(nUtf32))

        {

            if ((nFlags & RTL_UNICODETOTEXT_FLAGS_PRIVATE_IGNORE) != 0)

                nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;

            else if ((nFlags & RTL_UNICODETOTEXT_FLAGS_PRIVATE_MAPTO0) != 0)

                nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0;

        }

        else if (ImplIsZeroWidth(nUtf32))

        {

            if ((nFlags & RTL_UNICODETOTEXT_FLAGS_NONSPACING_IGNORE) != 0)

                nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;

        }

    }

    *pInfo |= bUndefined ? RTL_UNICODETOTEXT_INFO_UNDEFINED :

                           RTL_UNICODETOTEXT_INFO_INVALID;

    switch (nFlags & (bUndefined ? RTL_UNICODETOTEXT_FLAGS_UNDEFINED_MASK :

                                   RTL_UNICODETOTEXT_FLAGS_INVALID_MASK))

    {

    case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR:

    case RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR:

        *pInfo |= RTL_UNICODETOTEXT_INFO_ERROR;

        return BAD_INPUT_STOP;

    case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE:

    case RTL_UNICODETOTEXT_FLAGS_INVALID_IGNORE:

        if (pPrefixWritten)

            *pPrefixWritten = false;

        return BAD_INPUT_CONTINUE;

    case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0:

    case RTL_UNICODETOTEXT_FLAGS_INVALID_0:

        cReplace = 0;

        break;

    case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_QUESTIONMARK:

    case RTL_UNICODETOTEXT_FLAGS_INVALID_QUESTIONMARK:

    default: // RTL_UNICODETOTEXT_FLAGS_UNDEFINED_DEFAULT,

             // RTL_UNICODETOTEXT_FLAGS_INVALID_DEFAULT

        cReplace = '?';

        break;

    case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_UNDERLINE:

    case RTL_UNICODETOTEXT_FLAGS_INVALID_UNDERLINE:

        cReplace = '_';

        break;

    }

    if (o3tl::make_unsigned(pDestBufEnd - *pDestBufPtr) > nPrefixLen)

    {

        while (nPrefixLen-- > 0)

            *(*pDestBufPtr)++ = *pPrefix++;

        *(*pDestBufPtr)++ = cReplace;

        if (pPrefixWritten)

            *pPrefixWritten = true;

        return BAD_INPUT_CONTINUE;

    }

    return BAD_INPUT_NO_OUTPUT;

}

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