Method InternReadFile

code/AssetLib/IFC/IFCLoader.cpp:147–307

------------------------------------------------------------------------------------------------ Imports the given file into the given scene structure.

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void IFCImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
    std::shared_ptr<IOStream> stream(pIOHandler->Open(pFile));
    if (!stream) {
        ThrowException("Could not open file for reading");
    }

    // if this is a ifczip file, decompress its contents first
    if (GetExtension(pFile) == "ifczip") {
#ifndef ASSIMP_BUILD_NO_COMPRESSED_IFC
        unzFile zip = unzOpen(pFile.c_str());
        if (zip == nullptr) {
            ThrowException("Could not open ifczip file for reading, unzip failed");
        }

        // chop 'zip' postfix
        std::string fileName = pFile.substr(0, pFile.length() - 3);

        std::string::size_type s = pFile.find_last_of('\\');
        if (s == std::string::npos) {
            s = pFile.find_last_of('/');
        }
        if (s != std::string::npos) {
            fileName = fileName.substr(s + 1);
        }

        // search file (same name as the IFCZIP except for the file extension) and place file pointer there
        if (UNZ_OK == unzGoToFirstFile(zip)) {
            do {
                // get file size, etc.
                unz_file_info fileInfo;
                char filename[256];
                unzGetCurrentFileInfo(zip, &fileInfo, filename, sizeof(filename), nullptr, 0, nullptr, 0);
                if (GetExtension(filename) != "ifc") {
                    continue;
                }
                uint8_t *buff = new uint8_t[fileInfo.uncompressed_size];
                LogInfo("Decompressing IFCZIP file");
                unzOpenCurrentFile(zip);
                size_t total = 0;
                int read = 0;
                do {
                    unsigned bufferSize = fileInfo.uncompressed_size < INT16_MAX ? static_cast<unsigned>(fileInfo.uncompressed_size) : INT16_MAX;
                    void *buffer = malloc(bufferSize);
                    read = unzReadCurrentFile(zip, buffer, bufferSize);
                    if (read > 0) {
                        memcpy((char *)buff + total, buffer, read);
                        total += read;
                    }
                    free(buffer);
                } while (read > 0);
                size_t filesize = fileInfo.uncompressed_size;
                if (total == 0 || size_t(total) != filesize) {
                    delete[] buff;
                    ThrowException("Failed to decompress IFC ZIP file");
                }
                unzCloseCurrentFile(zip);
                stream = std::make_shared<MemoryIOStream>(buff, fileInfo.uncompressed_size, true);
                if (unzGoToNextFile(zip) == UNZ_END_OF_LIST_OF_FILE) {