CWE-ou-minkata/Sources/Plasma/PubUtilLib/plFile/plStreamSource.cpp

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*==LICENSE==*/

#include "HeadSpin.h"
#include "plStreamSource.h"
#include "plSecureStream.h"
#include "plEncryptedStream.h"

#if HS_BUILD_FOR_UNIX
#    include <wctype.h>
#endif

plStreamSource::plStreamSource()
{
    memset(fServerKey, 0, arrsize(fServerKey));
}

void plStreamSource::ICleanup()
{
    hsTempMutexLock lock(fMutex);

    // loop through all the file data records, and delete the streams
    decltype(fFileData.begin()) curData;
    for (curData = fFileData.begin(); curData != fFileData.end(); curData++)
    {
        curData->second.fStream->Close();
        delete curData->second.fStream;
        curData->second.fStream = nil;
    }

    fFileData.clear();
}

hsStream* plStreamSource::GetFile(const plFileName& filename)
{
    hsTempMutexLock lock(fMutex);

    plFileName sFilename = filename.Normalize('/');
    if (fFileData.find(sFilename) == fFileData.end())
    {
#ifndef PLASMA_EXTERNAL_RELEASE
        // internal releases can pull from disk
        if (plFileInfo(filename).Exists())
        {
            // file exists on disk, cache it
            fFileData[sFilename].fFilename = sFilename;
            fFileData[sFilename].fDir = sFilename.StripFileName();
            fFileData[sFilename].fExt = sFilename.GetFileExt();
            if (plSecureStream::IsSecureFile(filename))
            {
                hsStream* ss = nullptr;

                uint32_t encryptionKey[4];
                if (plSecureStream::GetSecureEncryptionKey(filename, encryptionKey, 4))
                    ss = plSecureStream::OpenSecureFile(filename, 0, encryptionKey);
                else
                    ss = plSecureStream::OpenSecureFile(filename, 0, fServerKey);
                fFileData[sFilename].fStream = ss;
                hsAssert(ss, "failed to open a SecureStream for a disc file!");
            }
            else // otherwise it is an encrypted or plain stream, this call handles both
                fFileData[sFilename].fStream = plEncryptedStream::OpenEncryptedFile(filename);

            return fFileData[sFilename].fStream;
        }
#endif // PLASMA_EXTERNAL_RELEASE
        return nil;
    }
    return fFileData[sFilename].fStream;
}

std::vector<plFileName> plStreamSource::GetListOfNames(const plFileName& dir, const plString& ext)
{
    plFileName sDir = dir.Normalize('/');
    hsAssert(ext.CharAt(0) != '.', "Don't add a dot");
    hsTempMutexLock lock(fMutex);

    // loop through all the file data records, and create the list
    std::vector<plFileName> retVal;
    for (auto curData = fFileData.begin(); curData != fFileData.end(); curData++)
    {
        if ((curData->second.fDir.AsString().CompareI(sDir.AsString()) == 0) &&
            (curData->second.fExt.CompareI(ext) == 0))
            retVal.push_back(curData->second.fFilename);
    }

#ifndef PLASMA_EXTERNAL_RELEASE
    // in internal releases, we can use on-disk files if they exist
    // Build the search string as "dir/*.ext"
    std::vector<plFileName> files = plFileSystem::ListDir(sDir, ("*." + ext).c_str());
    for (auto iter = files.begin(); iter != files.end(); ++iter)
    {
        plFileName norm = iter->Normalize('/');
        if (fFileData.find(norm) == fFileData.end()) // we haven't added it yet
            retVal.push_back(norm);
    }
#endif // PLASMA_EXTERNAL_RELEASE

    return retVal;
}

bool plStreamSource::InsertFile(const plFileName& filename, hsStream* stream)
{
    plFileName sFilename = filename.Normalize('/');

    hsTempMutexLock lock(fMutex);
    if (fFileData.find(sFilename) != fFileData.end())
        return false; // duplicate entry, return failure

    // copy the data over (takes ownership of the stream!)
    fFileData[sFilename].fFilename = sFilename;
    fFileData[sFilename].fDir = sFilename.StripFileName();
    fFileData[sFilename].fExt = sFilename.GetFileExt();
    fFileData[sFilename].fStream = stream;

    return true;
}

plStreamSource* plStreamSource::GetInstance()
{
    static plStreamSource source;
    return &source;
}