/* -*- 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 <sal/log.hxx>

#include <o3tl/safeint.hxx>

#include "bundles.hxx"
#include "cgm.hxx"
#include "elements.hxx"


void CGM::ImplDoClass1()
{
    tools::Long    nInteger, nI0, nI1;
    sal_uInt32  nUInteger;

    switch ( mnElementID )
    {
        case 0x01 : /*Metafile Version*/
            pElement->nMetaFileVersion = ImplGetI( pElement->nIntegerPrecision );
        break;
        case 0x02 : /*Metafile Description */break;
        case 0x03 : /*VDC Type*/
        {
            nUInteger = ImplGetUI16();
            switch( nUInteger )
            {
                case 0 : pElement->eVDCType = VDC_INTEGER; break;
                case 1 : pElement->eVDCType = VDC_REAL; break;
                default: mbStatus = false; break;
            }
        }
        break;
        case 0x04 : /*Integer Precision*/
        {
            nInteger = ImplGetI( pElement->nIntegerPrecision );
            switch ( nInteger )
            {
                case 32 :
                case 24 :
                case 16 :
                case 8 : pElement->nIntegerPrecision = nInteger >> 3; break;
                default : mbStatus = false; break;
            }
        }
        break;
        case 0x05 : /*Real Precision*/
        {
            nUInteger = ImplGetUI16();
            nI0 = ImplGetI( pElement->nIntegerPrecision );  // exponent
            nI1 = ImplGetI( pElement->nIntegerPrecision );  // mantissa
            switch( nUInteger )
            {
                case 0 :
                    pElement->eRealPrecision = RP_FLOAT;
                    switch ( nI0 )
                    {
                        case 9 :
                            if ( nI1 != 23 )
                                mbStatus = false;
                            pElement->nRealSize = 4;
                            break;
                        case 12 :
                            if ( nI1 != 52 )
                                mbStatus =false;
                            pElement->nRealSize = 8;
                            break;
                        default:
                            mbStatus = false;
                            break;
                    }
                    break;
                case 1 :
                    pElement->eRealPrecision = RP_FIXED;
                    if ( nI0 != nI1 )
                        mbStatus = false;
                    if ( nI0 == 16 )
                        pElement->nRealSize = 4;
                    else if ( nI0 == 32 )
                        pElement->nRealSize = 8;
                    else
                        mbStatus = false;
                    break;
                default :
                    mbStatus = false; break;
            }
        }
        break;
        case 0x06 : /*Index Precision*/
        {
            nInteger = ImplGetI( pElement->nIntegerPrecision );
            switch ( nInteger )
            {
                case 32 :
                case 24 :
                case 16 :
                case 8 : pElement->nIndexPrecision = nInteger >> 3; break;
                default : mbStatus = false; break;
            }
        }
        break;
        case 0x07 : /*Color Precision*/
        {
            nInteger = ImplGetI( pElement->nIntegerPrecision );
            switch ( nInteger )
            {
                case 32 :
                case 24 :
                case 16 :
                case 8 : pElement->nColorPrecision = nInteger >> 3; break;
                default : mbStatus = false; break;
            }
        }
        break;
        case 0x08 : /*Color Index Precision*/
        {
            nInteger = ImplGetI( pElement->nIntegerPrecision );
            switch ( nInteger )
            {
                case 32 :
                case 24 :
                case 16 :
                case 8 : pElement->nColorIndexPrecision = nInteger >> 3; break;
                default : mbStatus = false; break;
            }
        }
        break;
        case 0x09 : /*Maximum Colour Index*/
        {
            pElement->nColorMaximumIndex = ImplGetUI( pElement->nColorIndexPrecision );
            if ( ( pElement->nColorMaximumIndex > 256 /*255*/ ) || ( pElement->nColorMaximumIndex == 0 ) )
                mbStatus = false;
        }
        break;
        case 0x0a : /*Color Value Extent*/
        {
            nI1 = 6;
        }
        break;
        case 0x0b : /*MetaFile Element List */break;
        case 0x0c : /*MetaFile Default Replacement*/
        {
            if ( mnElementSize > 1 )
            {
                std::unique_ptr<sal_uInt8[]> pBuf(new sal_uInt8[ mnElementSize ]);
                memcpy( pBuf.get(), mpSource, mnElementSize );
                maDefRepList.push_back( std::move(pBuf) );
                maDefRepSizeList.push_back( mnElementSize );
            }
            mnParaSize = mnElementSize;
        }
        break;
        case 0x0d : /*Font List*/
        {
            while ( mnParaSize < mnElementSize )
            {
                sal_uInt32 nSize = ImplGetUI(1);

                if (o3tl::make_unsigned(mpEndValidSource - (mpSource + mnParaSize)) < nSize)
                    throw css::uno::Exception("attempt to read past end of input", nullptr);

                pElement->aFontList.InsertName( mpSource + mnParaSize, nSize );
                mnParaSize += nSize;
            }
        }
        break;
        case 0x0e : /*Character Set List*/
        {
            while ( mnParaSize < mnElementSize )
            {
                ImplGetUI16(); // skip CharSetType
                sal_uInt32 nSize = ImplGetUI(1);

                if (o3tl::make_unsigned(mpEndValidSource - (mpSource + mnParaSize)) < nSize)
                    throw css::uno::Exception("attempt to read past end of input", nullptr);

                pElement->aFontList.InsertCharSet( mpSource + mnParaSize, nSize );
                mnParaSize += nSize;
            }
        }
        break;
        case 0x0f : /*Character Coding Announcer*/
        {
            auto nCharacterCoding = ImplGetUI16();
            if (nCharacterCoding <= CCA_EXT_8)
                pElement->eCharacterCodingA = static_cast<CharacterCodingA>(nCharacterCoding);
            else
                SAL_WARN("filter.icgm", "CharacterCoding " << nCharacterCoding << " requested, but legal max is " << CCA_EXT_8);
        }
        break;
        case 0x10 : /*Name Precision */break;                   // NS
        case 0x11 : /*Maximum VDC Extent */break;               // NS
        case 0x12 : /*Segment Priority Extent */break;          // NS
        case 0x13 : /*Color Model */break;                      // NS
        case 0x14 : /*Color Calibration */break;                // NS
        case 0x15 : /*Font Properties */break;                  // NS
        case 0x16 : /*Glyph Mapping */break;                    // NS
        case 0x17 : /*Symbol Library List */break;              // NS
        case 0xfc : /*Inquire Function Support */break;
        case 0xfa : /*End Metafile Defaults Replacement */break;
        case 0xf8 : /*Set Color Value Desc Extent */break;
        default: break;
    }
};


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