// slang-api.cpp

#include "slang-compiler.h"

#include "slang-repro.h"

#include "../core/slang-shared-library.h"

// implementation of C interface

SLANG_API SlangSession* spCreateSession(const char*)
{
    Slang::ComPtr<slang::IGlobalSession> globalSession;
    if (SLANG_FAILED(slang_createGlobalSession(SLANG_API_VERSION, globalSession.writeRef())))
    {
        return nullptr;
    }
    // Will be returned with a refcount of 1
    return globalSession.detach();
}

// Attempt to load a previously compiled stdlib from the same file system location as the slang dll.
// Returns SLANG_OK when the cache is sucessfully loaded.
// Also returns the filename to the stdlib cache and the timestamp of current slang dll.
SlangResult tryLoadStdLibFromCache(
    slang::IGlobalSession* globalSession,
    Slang::String& outCachePath,
    uint64_t& outTimestamp)
{
    auto fileName =
        Slang::SharedLibraryUtils::getSharedLibraryFileName((void*)slang_createGlobalSession);
    uint64_t currentLibTimestamp =
        Slang::SharedLibraryUtils::getSharedLibraryTimestamp((void*)slang_createGlobalSession);
    auto dirName = Slang::Path::getParentDirectory(fileName);
    auto cacheFileName = Slang::Path::combine(dirName, "slang-stdlib.bin");
    outTimestamp = currentLibTimestamp;
    outCachePath = cacheFileName;
    if (currentLibTimestamp == 0)
    {
        return SLANG_FAIL;
    }
    Slang::ScopedAllocation cacheData;
    SLANG_RETURN_ON_FAIL(Slang::File::readAllBytes(cacheFileName, cacheData));

    // The first 8 bytes stores the timestamp of the slang dll that created this stdlib cache.
    if (cacheData.getSizeInBytes() < sizeof(uint64_t))
        return SLANG_FAIL;
    auto cacheTimestamp = *(uint64_t*)(cacheData.getData());
    if (cacheTimestamp != currentLibTimestamp)
        return SLANG_FAIL;
    SLANG_RETURN_ON_FAIL(globalSession->loadStdLib(
        (uint8_t*)cacheData.getData() + sizeof(uint64_t),
        cacheData.getSizeInBytes() - sizeof(uint64_t)));
    return SLANG_OK;
}

SlangResult trySaveStdLibToCache(
    slang::IGlobalSession* globalSession,
    const Slang::String& cacheFilename,
    uint64_t dllTimestamp)
{
    if (dllTimestamp != 0 && cacheFilename.getLength() != 0)
    {
        Slang::ComPtr<ISlangBlob> stdLibBlobPtr;
        SLANG_RETURN_ON_FAIL(
            globalSession->saveStdLib(SLANG_ARCHIVE_TYPE_RIFF_LZ4, stdLibBlobPtr.writeRef()));

        Slang::FileStream fileStream;
        SLANG_RETURN_ON_FAIL(fileStream.init(cacheFilename, Slang::FileMode::Create));

        SLANG_RETURN_ON_FAIL(fileStream.write(&dllTimestamp, sizeof(dllTimestamp)));
        SLANG_RETURN_ON_FAIL(fileStream.write(stdLibBlobPtr->getBufferPointer(), stdLibBlobPtr->getBufferSize()))
    }

    return SLANG_OK;
}

SLANG_API SlangResult slang_createGlobalSession(
    SlangInt                apiVersion,
    slang::IGlobalSession** outGlobalSession)
{
    Slang::ComPtr<slang::IGlobalSession> globalSession;

#ifdef SLANG_ENABLE_IR_BREAK_ALLOC
    // Set inst debug alloc counter to 0 so IRInsts for stdlib always starts from a large value.
    Slang::_debugGetIRAllocCounter() = 0x80000000;
#endif

    SLANG_RETURN_ON_FAIL(slang_createGlobalSessionWithoutStdLib(apiVersion, globalSession.writeRef()));

    // If we have the embedded stdlib, load from that, else compile it
    ISlangBlob* stdLibBlob = slang_getEmbeddedStdLib();
    if (stdLibBlob)
    {
        SLANG_RETURN_ON_FAIL(globalSession->loadStdLib(stdLibBlob->getBufferPointer(), stdLibBlob->getBufferSize()));
    }
    else
    {
        Slang::String cacheFilename;
        uint64_t dllTimestamp = 0;
#define SLANG_PROFILE_STDLIB_COMPILE 0
#if SLANG_PROFILE_STDLIB_COMPILE
        auto startTime = std::chrono::high_resolution_clock::now();
#else
        if (tryLoadStdLibFromCache(globalSession, cacheFilename, dllTimestamp) != SLANG_OK)
#endif
        {
            // Compile std lib from embeded source.
            SLANG_RETURN_ON_FAIL(globalSession->compileStdLib(0));
#if SLANG_PROFILE_STDLIB_COMPILE
            auto timeElapsed = std::chrono::high_resolution_clock::now() - startTime;
            printf("stdlib compilation time: %.1fms\n", timeElapsed.count() / 1000000.0);
#endif
            // Store the compiled stdlib to cache file.
            trySaveStdLibToCache(globalSession, cacheFilename, dllTimestamp);
        }
    }

    *outGlobalSession = globalSession.detach();

#ifdef SLANG_ENABLE_IR_BREAK_ALLOC
    // Reset inst debug alloc counter to 0 so IRInsts for user code always starts from 0.
    Slang::_debugGetIRAllocCounter() = 0;
#endif

    return SLANG_OK;
}

SLANG_API SlangResult slang_createGlobalSessionWithoutStdLib(
    SlangInt                apiVersion,
    slang::IGlobalSession** outGlobalSession)
{
    if (apiVersion != 0)
        return SLANG_E_NOT_IMPLEMENTED;

    // Create the session
    Slang::Session* globalSession = new Slang::Session();
    // Put an interface ref on it
    Slang::ComPtr<slang::IGlobalSession> result(globalSession);

    // Initialize it
    globalSession->init();

    *outGlobalSession = result.detach();
    return SLANG_OK;
}

SLANG_API void spDestroySession(
    SlangSession*   inSession)
{
    if (!inSession) return;

    Slang::Session* session = Slang::asInternal(inSession);
    // It is assumed there is only a single reference on the session (the one placed
    // with spCreateSession) if this function is called
    SLANG_ASSERT(session->debugGetReferenceCount() == 1);
    // Release
    session->release();
}

SLANG_API const char* spGetBuildTagString()
{
    return Slang::getBuildTagString();
}

SLANG_API void spAddBuiltins(
    SlangSession*   session,
    char const*     sourcePath,
    char const*     sourceString)
{
    session->addBuiltins(sourcePath, sourceString);
}

SLANG_API void spSessionSetSharedLibraryLoader(
    SlangSession*               session,
    ISlangSharedLibraryLoader* loader)
{
    session->setSharedLibraryLoader(loader);
}

SLANG_API ISlangSharedLibraryLoader* spSessionGetSharedLibraryLoader(
    SlangSession*               session)
{
    return session->getSharedLibraryLoader();
}

SLANG_API SlangResult spSessionCheckCompileTargetSupport(
    SlangSession*                session,
    SlangCompileTarget           target)
{
    return session->checkCompileTargetSupport(target);
}

SLANG_API SlangResult spSessionCheckPassThroughSupport(
    SlangSession*       session,
    SlangPassThrough    passThrough)
{
    return session->checkPassThroughSupport(passThrough);
}

SLANG_API SlangCompileRequest* spCreateCompileRequest(
    SlangSession* session)
{
    slang::ICompileRequest* request = nullptr;
    // Will return with suitable ref count
    session->createCompileRequest(&request);
    return request;
}

SLANG_API SlangProfileID spFindProfile(
    SlangSession* session,
    char const*     name)
{
    return session->findProfile(name);
}

SLANG_API SlangCapabilityID spFindCapability(
    SlangSession*   session,
    char const*     name)
{
    return session->findCapability(name);
}

/* !!!!!!!!!!!!!!!!!!SlangCompileRequest API!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */

/*!
@brief Destroy a compile request.
*/
SLANG_API void spDestroyCompileRequest(
    slang::ICompileRequest*    request)
{
    if (request)
    {
        request->release();
    }
}

/* All other functions just call into the ICompileResult interface. */

SLANG_API void spSetFileSystem(
    slang::ICompileRequest*    request,
    ISlangFileSystem*       fileSystem)
{
    SLANG_ASSERT(request);
    request->setFileSystem(fileSystem);
}

SLANG_API void spSetCompileFlags(
    slang::ICompileRequest*    request,
    SlangCompileFlags       flags)
{
    SLANG_ASSERT(request);
    request->setCompileFlags(flags);
}

SLANG_API SlangCompileFlags spGetCompileFlags(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->getCompileFlags();
}

SLANG_API void spSetDumpIntermediates(
    slang::ICompileRequest*    request,
    int                     enable)
{
    SLANG_ASSERT(request);
    request->setDumpIntermediates(enable);
}

SLANG_API void spSetDumpIntermediatePrefix(
    slang::ICompileRequest*    request,
    const char* prefix)
{
    SLANG_ASSERT(request);
    request->setDumpIntermediatePrefix(prefix);
}

SLANG_API void spSetLineDirectiveMode(
    slang::ICompileRequest*    request,
    SlangLineDirectiveMode  mode)
{
    SLANG_ASSERT(request);
    request->setLineDirectiveMode(mode);
}


SLANG_API void spSetTargetForceGLSLScalarBufferLayout(
    slang::ICompileRequest* request, int targetIndex, bool forceScalarLayout)
{
    SLANG_ASSERT(request);
    request->setTargetForceGLSLScalarBufferLayout(targetIndex, forceScalarLayout);
}

SLANG_API void spSetTargetLineDirectiveMode(
    slang::ICompileRequest* request,
    int targetIndex,
    SlangLineDirectiveMode mode)
{
    SLANG_ASSERT(request);
    request->setTargetLineDirectiveMode(targetIndex, mode);
}

SLANG_API void spSetCommandLineCompilerMode(
    slang::ICompileRequest* request)
{
    SLANG_ASSERT(request);
    request->setCommandLineCompilerMode();
}

SLANG_API void spSetCodeGenTarget(
    slang::ICompileRequest*    request,
    SlangCompileTarget target)
{
    SLANG_ASSERT(request);
    request->setCodeGenTarget(target);
}

SLANG_API int spAddCodeGenTarget(
    slang::ICompileRequest*    request,
    SlangCompileTarget      target)
{
    SLANG_ASSERT(request);
    return request->addCodeGenTarget(target);
}

SLANG_API void spSetTargetProfile(
    slang::ICompileRequest*    request,
    int                     targetIndex,
    SlangProfileID          profile)
{
    SLANG_ASSERT(request);
    request->setTargetProfile(targetIndex, profile);
}

SLANG_API void spSetTargetFlags(
    slang::ICompileRequest*    request,
    int                     targetIndex,
    SlangTargetFlags        flags)
{
    SLANG_ASSERT(request);
    request->setTargetFlags(targetIndex, flags);
}

SLANG_API void spSetTargetFloatingPointMode(
    slang::ICompileRequest*    request,
    int                     targetIndex,
    SlangFloatingPointMode  mode)
{
    SLANG_ASSERT(request);
    request->setTargetFloatingPointMode(targetIndex, mode);
}

SLANG_API void spAddTargetCapability(
    slang::ICompileRequest* request,
    int                     targetIndex,
    SlangCapabilityID       capability)
{
    SLANG_ASSERT(request);
    request->addTargetCapability(targetIndex, capability);
}

SLANG_API void spSetMatrixLayoutMode(
    slang::ICompileRequest*    request,
    SlangMatrixLayoutMode   mode)
{
    SLANG_ASSERT(request);
    request->setMatrixLayoutMode(mode);
}

SLANG_API void spSetTargetMatrixLayoutMode(
    slang::ICompileRequest*    request,
    int                     targetIndex,
    SlangMatrixLayoutMode   mode)
{
    SLANG_ASSERT(request);
    request->setTargetMatrixLayoutMode(targetIndex, mode);
}

SLANG_API void spSetDebugInfoLevel(
    slang::ICompileRequest*    request,
    SlangDebugInfoLevel     level)
{
    SLANG_ASSERT(request);
    request->setDebugInfoLevel(level);
}

SLANG_API void spSetOptimizationLevel(
    slang::ICompileRequest*    request,
    SlangOptimizationLevel  level)
{
    SLANG_ASSERT(request);
    request->setOptimizationLevel(level);
}

SLANG_API void spSetOutputContainerFormat(
    slang::ICompileRequest*    request,
    SlangContainerFormat    format)
{
    SLANG_ASSERT(request);
    request->setOutputContainerFormat(format);
}

SLANG_API void spSetPassThrough(
    slang::ICompileRequest*    request,
    SlangPassThrough        passThrough)
{
    SLANG_ASSERT(request);
    request->setPassThrough(passThrough);
}

SLANG_API void spSetDiagnosticCallback(
    slang::ICompileRequest*    request,
    SlangDiagnosticCallback callback,
    void const*             userData)
{
    SLANG_ASSERT(request);
    request->setDiagnosticCallback(callback, userData);
}

SLANG_API void spSetWriter(
    slang::ICompileRequest*    request,
    SlangWriterChannel      chan,
    ISlangWriter*           writer)
{
    SLANG_ASSERT(request);
    request->setWriter(chan, writer);
}

SLANG_API ISlangWriter* spGetWriter(
    slang::ICompileRequest*    request,
    SlangWriterChannel      chan)
{
    SLANG_ASSERT(request);
    return request->getWriter(chan);
}

SLANG_API void spAddSearchPath(
    slang::ICompileRequest*    request,
    const char*             path)
{
    SLANG_ASSERT(request);
    request->addSearchPath(path);
}

SLANG_API void spAddPreprocessorDefine(
    slang::ICompileRequest*    request,
    const char*             key,
    const char*             value)
{
    SLANG_ASSERT(request);
    request->addPreprocessorDefine(key, value);
}

SLANG_API char const* spGetDiagnosticOutput(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->getDiagnosticOutput();
}

SLANG_API SlangResult spGetDiagnosticOutputBlob(
    slang::ICompileRequest*    request,
    ISlangBlob**            outBlob)
{
    SLANG_ASSERT(request);
    return request->getDiagnosticOutputBlob(outBlob);
}

// New-fangled compilation API

SLANG_API int spAddTranslationUnit(
    slang::ICompileRequest*    request,
    SlangSourceLanguage     language,
    char const*             inName)
{
    SLANG_ASSERT(request);
    return request->addTranslationUnit(language, inName);
}

SLANG_API void spSetDefaultModuleName(
    slang::ICompileRequest*    request,
    const char* defaultModuleName)
{
    SLANG_ASSERT(request);
    request->setDefaultModuleName(defaultModuleName);
}

SLANG_API SlangResult spAddLibraryReference(
    slang::ICompileRequest*    request,
    const void* libData,
    size_t libDataSize)
{
    SLANG_ASSERT(request);
    return request->addLibraryReference(libData, libDataSize);
}

SLANG_API void spTranslationUnit_addPreprocessorDefine(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    const char*             key,
    const char*             value)
{
    SLANG_ASSERT(request);
    request->addTranslationUnitPreprocessorDefine(translationUnitIndex, key, value);
}

SLANG_API void spAddTranslationUnitSourceFile(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             path)
{
    SLANG_ASSERT(request);
    request->addTranslationUnitSourceFile(translationUnitIndex, path);
}

SLANG_API void spAddTranslationUnitSourceString(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             path,
    char const*             source)
{
    SLANG_ASSERT(request);
    request->addTranslationUnitSourceString(translationUnitIndex, path, source);
}

SLANG_API void spAddTranslationUnitSourceStringSpan(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             path,
    char const*             sourceBegin,
    char const*             sourceEnd)
{
    SLANG_ASSERT(request);
    request->addTranslationUnitSourceStringSpan(translationUnitIndex, path, sourceBegin, sourceEnd);
}

SLANG_API void spAddTranslationUnitSourceBlob(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             path,
    ISlangBlob*             sourceBlob)
{
    SLANG_ASSERT(request);
    request->addTranslationUnitSourceBlob(translationUnitIndex, path, sourceBlob);
}

SLANG_API int spAddEntryPoint(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             name,
    SlangStage              stage)
{
    SLANG_ASSERT(request);
    return request->addEntryPoint(translationUnitIndex, name, stage);
}

SLANG_API int spAddEntryPointEx(
    slang::ICompileRequest*    request,
    int                     translationUnitIndex,
    char const*             name,
    SlangStage              stage,
    int                     genericParamTypeNameCount,
    char const **           genericParamTypeNames)
{
    SLANG_ASSERT(request);
    return request->addEntryPointEx(translationUnitIndex, name, stage, genericParamTypeNameCount, genericParamTypeNames);
}

SLANG_API SlangResult spSetGlobalGenericArgs(
    slang::ICompileRequest*    request,
    int                     genericArgCount,
    char const**            genericArgs)
{
    SLANG_ASSERT(request);
    return request->setGlobalGenericArgs(genericArgCount, genericArgs);
}

SLANG_API SlangResult spSetTypeNameForGlobalExistentialTypeParam(
    slang::ICompileRequest*    request,
    int                     slotIndex,
    char const*             typeName)
{
    SLANG_ASSERT(request);
    return request->setTypeNameForGlobalExistentialTypeParam(slotIndex, typeName);
}

SLANG_API SlangResult spSetTypeNameForEntryPointExistentialTypeParam(
    slang::ICompileRequest*    request,
    int                     entryPointIndex,
    int                     slotIndex,
    char const*             typeName)
{
    SLANG_ASSERT(request);
    return request->setTypeNameForEntryPointExistentialTypeParam(entryPointIndex, slotIndex, typeName);
}

SLANG_API SlangResult spCompile(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->compile();
}

SLANG_API int
spGetDependencyFileCount(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->getDependencyFileCount();
}

SLANG_API char const*
spGetDependencyFilePath(
    slang::ICompileRequest*    request,
    int                     index)
{
    SLANG_ASSERT(request);
    return request->getDependencyFilePath(index);
}

SLANG_API int
spGetTranslationUnitCount(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->getTranslationUnitCount();
}

SLANG_API void const* spGetEntryPointCode(
    slang::ICompileRequest*    request,
    int                     entryPointIndex,
    size_t*                 outSize)
{
    SLANG_ASSERT(request);
    return request->getEntryPointCode(entryPointIndex, outSize);
}

SLANG_API SlangResult spGetEntryPointCodeBlob(
    slang::ICompileRequest*    request,
    int                     entryPointIndex,
    int                     targetIndex,
    ISlangBlob**            outBlob)
{
    SLANG_ASSERT(request);
    return request->getEntryPointCodeBlob(entryPointIndex, targetIndex, outBlob);
}

SLANG_API SlangResult spGetEntryPointHostCallable(
    slang::ICompileRequest*    request,
    int                     entryPointIndex,
    int                     targetIndex,
    ISlangSharedLibrary**   outSharedLibrary)
{
    SLANG_ASSERT(request);
    return request->getEntryPointHostCallable(entryPointIndex, targetIndex, outSharedLibrary);
}

SLANG_API SlangResult spGetTargetCodeBlob(
    slang::ICompileRequest* request,
    int targetIndex,
    ISlangBlob** outBlob)
{
    SLANG_ASSERT(request);
    return request->getTargetCodeBlob(targetIndex, outBlob);
}

SLANG_API SlangResult spGetTargetHostCallable(
    slang::ICompileRequest* request,
    int targetIndex,
    ISlangSharedLibrary** outSharedLibrary)
{
    SLANG_ASSERT(request);
    return request->getTargetHostCallable(targetIndex, outSharedLibrary);
}

SLANG_API char const* spGetEntryPointSource(
    slang::ICompileRequest*    request,
    int                     entryPointIndex)
{
    SLANG_ASSERT(request);
    return request->getEntryPointSource(entryPointIndex);
}

SLANG_API void const* spGetCompileRequestCode(
    slang::ICompileRequest*    request,
    size_t*                 outSize)
{
    SLANG_ASSERT(request);
    return request->getCompileRequestCode(outSize);
}

SLANG_API SlangResult spGetContainerCode(
    slang::ICompileRequest*    request,
    ISlangBlob**            outBlob)
{
    SLANG_ASSERT(request);
    return request->getContainerCode(outBlob);
}

SLANG_API SlangResult spLoadRepro(
    slang::ICompileRequest* request,
    ISlangFileSystem* fileSystem,
    const void* data,
    size_t size)
{
    SLANG_ASSERT(request);
    return request->loadRepro(fileSystem, data, size);
}

SLANG_API SlangResult spSaveRepro(
    slang::ICompileRequest* request,
    ISlangBlob** outBlob)
{
    SLANG_ASSERT(request);
    return request->saveRepro(outBlob);
}

SLANG_API SlangResult spEnableReproCapture(
    slang::ICompileRequest* request)
{
    SLANG_ASSERT(request);
    return request->enableReproCapture();
}

SLANG_API SlangResult spCompileRequest_getProgram(
    slang::ICompileRequest*    request,
    slang::IComponentType** outProgram)
{
    SLANG_ASSERT(request);
    return request->getProgram(outProgram);
}

SLANG_API SlangResult spCompileRequest_getProgramWithEntryPoints(
    slang::ICompileRequest*    request,
    slang::IComponentType** outProgram)
{
    SLANG_ASSERT(request);
    return request->getProgramWithEntryPoints(outProgram);
}

SLANG_API SlangResult spCompileRequest_getModule(
    slang::ICompileRequest*    request,
    SlangInt                translationUnitIndex,
    slang::IModule**        outModule)
{
    SLANG_ASSERT(request);
    return request->getModule(translationUnitIndex, outModule);
}

SLANG_API SlangResult spCompileRequest_getSession(
    slang::ICompileRequest* request,
    slang::ISession** outSession)
{
    SLANG_ASSERT(request);
    return request->getSession(outSession);
}

SLANG_API SlangResult spCompileRequest_getEntryPoint(
    slang::ICompileRequest*    request,
    SlangInt                entryPointIndex,
    slang::IComponentType** outEntryPoint)
{
    SLANG_ASSERT(request);
    return request->getEntryPoint(entryPointIndex, outEntryPoint);
}

// Get the output code associated with a specific translation unit
SLANG_API char const* spGetTranslationUnitSource(
    slang::ICompileRequest*    /*request*/,
    int                     /*translationUnitIndex*/)
{
    fprintf(stderr, "DEPRECATED: spGetTranslationUnitSource()\n");
    return nullptr;
}

SLANG_API SlangResult spProcessCommandLineArguments(
    SlangCompileRequest*    request,
    char const* const*      args,
    int                     argCount)
{
    return request->processCommandLineArguments(args, argCount);
}

// Reflection API

SLANG_API SlangReflection* spGetReflection(
    slang::ICompileRequest*    request)
{
    SLANG_ASSERT(request);
    return request->getReflection();
}

// ... rest of reflection API implementation is in `Reflection.cpp`

/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!! Session !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */

SLANG_API SlangResult spExtractRepro(SlangSession* session, const void* reproData, size_t reproDataSize, ISlangMutableFileSystem* fileSystem)
{
    using namespace Slang;
    SLANG_UNUSED(session);

    DiagnosticSink sink;
    sink.init(nullptr, nullptr);

    List<uint8_t> buffer;
    {
        MemoryStreamBase memoryStream(FileAccess::Read, reproData, reproDataSize);
        SLANG_RETURN_ON_FAIL(ReproUtil::loadState(&memoryStream, &sink, buffer));
    }

    MemoryOffsetBase base;
    base.set(buffer.getBuffer(), buffer.getCount());

    ReproUtil::RequestState* requestState = ReproUtil::getRequest(buffer);
    return ReproUtil::extractFiles(base, requestState, fileSystem);
}

SLANG_API SlangResult spLoadReproAsFileSystem(
    SlangSession* session,
    const void* reproData,
    size_t reproDataSize,
    ISlangFileSystem* replaceFileSystem,
    ISlangFileSystemExt** outFileSystem)
{
    using namespace Slang;

    SLANG_UNUSED(session);

    DiagnosticSink sink;
    sink.init(nullptr, nullptr);

    MemoryStreamBase stream(FileAccess::Read, reproData, reproDataSize);

    List<uint8_t> buffer;
    SLANG_RETURN_ON_FAIL(ReproUtil::loadState(&stream, &sink, buffer));

    auto requestState = ReproUtil::getRequest(buffer);
    MemoryOffsetBase base;
    base.set(buffer.getBuffer(), buffer.getCount());

    ComPtr<ISlangFileSystemExt> fileSystem;
    SLANG_RETURN_ON_FAIL(ReproUtil::loadFileSystem(base, requestState, replaceFileSystem, fileSystem));

    *outFileSystem = fileSystem.detach();
    return SLANG_OK;
}

SLANG_API void spOverrideDiagnosticSeverity(
    slang::ICompileRequest* request,
    SlangInt messageID,
    SlangSeverity overrideSeverity)
{
    if (!request)
        return;

    request->overrideDiagnosticSeverity(messageID, overrideSeverity);
}

SLANG_API SlangDiagnosticFlags spGetDiagnosticFlags(slang::ICompileRequest* request)
{
    if (!request)
        return 0;

    return request->getDiagnosticFlags();
}

SLANG_API void spSetDiagnosticFlags(slang::ICompileRequest* request, SlangDiagnosticFlags flags)
{
    if (!request)
        return;

    request->setDiagnosticFlags(flags);
}