/******************************************************************************

 *

 * Project:  GDAL

 * Purpose:  Fuzzer

 * Author:   Even Rouault, even.rouault at spatialys.com

 *

 ******************************************************************************

 * Copyright (c) 2018, Even Rouault <even.rouault at spatialys.com>

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 ****************************************************************************/

#include "gdal.h"

#include "cpl_conv.h"

#include "cpl_string.h"

#include "cpl_error.h"

#include "cpl_vsi.h"

#include "gdal_utils.h"

#ifndef REGISTER_FUNC

#define REGISTER_FUNC OGRRegisterAll

#endif

extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv);

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len);

int LLVMFuzzerInitialize(int * /*argc*/, char ***argv)

{

    const char *exe_path = (*argv)[0];

    if (CPLGetConfigOption("GDAL_DATA", nullptr) == nullptr)

    {

        CPLSetConfigOption("GDAL_DATA", CPLGetPathSafe(exe_path).c_str());

    }

    CPLSetConfigOption("CPL_TMPDIR", "/tmp");

    CPLSetConfigOption("DISABLE_OPEN_REAL_NETCDF_FILES", "YES");

    CPLSetConfigOption("GDAL_HTTP_TIMEOUT", "1");

    CPLSetConfigOption("GDAL_HTTP_CONNECTTIMEOUT", "1");

#ifdef OGR_SKIP

    CPLSetConfigOption("OGR_SKIP", OGR_SKIP);

#endif

    REGISTER_FUNC();

    return 0;

}

int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)

{

    VSILFILE *fp = VSIFileFromMemBuffer(

        "/vsimem/test.tar",

        reinterpret_cast<GByte *>(const_cast<uint8_t *>(buf)), len, FALSE);

    VSIFCloseL(fp);

    CPLPushErrorHandler(CPLQuietErrorHandler);

    char **papszArgv = nullptr;

    CPLString osOutFilename("out");

    fp = VSIFOpenL("/vsitar//vsimem/test.tar/cmd.txt", "rb");

    if (fp != nullptr)

    {

        const char *pszLine = nullptr;

        if ((pszLine = CPLReadLineL(fp)) != nullptr)

        {

            osOutFilename = pszLine;

            osOutFilename = osOutFilename.replaceAll('/', '_');

        }

        int nCandidateLayerNames = 0;

        while ((pszLine = CPLReadLineL(fp)) != nullptr)

        {

            if (pszLine[0] != '-')

            {

                nCandidateLayerNames++;

                if (nCandidateLayerNames == 10)

                    break;

            }

            papszArgv = CSLAddString(papszArgv, pszLine);

        }

        VSIFCloseL(fp);

    }

    char **papszDrivers = CSLAddString(nullptr, "CSV");

    GDALDatasetH hSrcDS =

        GDALOpenEx("/vsitar//vsimem/test.tar/in", GDAL_OF_VECTOR, papszDrivers,

                   nullptr, nullptr);

    CSLDestroy(papszDrivers);

    if (papszArgv != nullptr && hSrcDS != nullptr)

    {

        const int nLayerCount = GDALDatasetGetLayerCount(hSrcDS);

        for (int i = 0; i < nLayerCount; i++)

        {

            OGRLayerH hLayer = GDALDatasetGetLayer(hSrcDS, i);

            if (hLayer)

            {

                int nFieldCount =

                    OGR_FD_GetFieldCount(OGR_L_GetLayerDefn(hLayer));

                if (nFieldCount > 100)

                {

                    papszArgv = CSLAddString(papszArgv, "-limit");

                    papszArgv = CSLAddString(papszArgv, "100");

                    break;

                }

            }

        }

        GDALVectorTranslateOptions *psOptions =

            GDALVectorTranslateOptionsNew(papszArgv, nullptr);

        if (psOptions)

        {

            CPLString osFullOutFilename("/vsimem/" + osOutFilename);

            GDALDatasetH hOutDS =

                GDALVectorTranslate(osFullOutFilename.c_str(), nullptr, 1,

                                    &hSrcDS, psOptions, nullptr);

            if (hOutDS)

            {

                GDALDriverH hOutDrv = GDALGetDatasetDriver(hOutDS);

                GDALClose(hOutDS);

                // Try re-opening generated file

                GDALClose(GDALOpenEx(osFullOutFilename, GDAL_OF_VECTOR, nullptr,

                                     nullptr, nullptr));

                if (hOutDrv)

                    GDALDeleteDataset(hOutDrv, osFullOutFilename);

            }

            GDALVectorTranslateOptionsFree(psOptions);

        }

    }

    CSLDestroy(papszArgv);

    GDALClose(hSrcDS);

    VSIRmdirRecursive("/vsimem/");

    CPLPopErrorHandler();

    return 0;

}