Method addPreDeflatedEntries

source/MRMesh/MRZip.cpp:190–225

Takes ownership of pre-deflated entries and registers them in the archive in order. Entries stay alive for the AutoCloseZip's lifetime, so libzip's later zip_close (either explicit or from the destructor) still sees valid memory when it drains the sources.

    /// Entries stay alive for the AutoCloseZip's lifetime, so libzip's later zip_close (either
    /// explicit or from the destructor) still sees valid memory when it drains the sources.
    Expected<void> addPreDeflatedEntries(
        std::vector<DeflatedEntry> entries,
        const std::vector<std::pair<std::filesystem::path, std::string>>& files,
        int level,
        const std::string& password )
    {
        assert( entries.size() == files.size() );
        entries_ = std::move( entries );
        const zip_uint16_t gpbFlags = deflateGpbLevelFlags( level );
        for ( size_t i = 0; i < entries_.size(); ++i )
        {
            auto& entry = entries_[i];
            entry.gpbFlags = gpbFlags;
            const auto& archiveFilePath = files[i].second;

            zip_source_t* src = zip_source_function( handle_, deflatedSourceCallback, &entry );
            if ( !src )
                return unexpected( "Cannot create source for " + archiveFilePath );

            const auto index = zip_file_add( handle_, archiveFilePath.c_str(), src, ZIP_FL_OVERWRITE | ZIP_FL_ENC_UTF_8 );
            if ( index < 0 )
            {
                zip_source_free( src );
                return unexpected( "Cannot add file " + archiveFilePath + " to archive" );
            }

            zip_set_file_compression( handle_, index, ZIP_CM_DEFLATE, zip_uint32_t( level ) );

            if ( !password.empty() )
            {
                if ( zip_file_set_encryption( handle_, index, ZIP_EM_AES_256, password.c_str() ) )
                    return unexpected( "Cannot encrypt file " + archiveFilePath + " in archive" );
            }
        }
        return {};
    }

private:
    zip_t * handle_ = nullptr;