Start implementing map saver

lib/filesystem/CZipSaver.cpp

@@ -0,0 +1,79 @@
+/*
+ * CZipSaver.cpp, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+ 
+#include "StdInc.h"
+#include "CZipSaver.h"
+
+///CZipOutputStream
+CZipOutputStream::CZipOutputStream(zipFile archive, const std::string & archiveFilename):
+	handle(archive)
+{
+	//zip_fileinfo fileInfo;
+	
+	zipOpenNewFileInZip(handle,
+                       archiveFilename.c_str(),
+                       nullptr,//todo: use fileInfo,
+                       nullptr,
+                       0,
+                       nullptr,
+                       0,
+                       "",
+                       Z_DEFLATED,
+                       Z_DEFAULT_COMPRESSION);
+}
+
+CZipOutputStream::~CZipOutputStream()
+{
+	zipCloseFileInZip(handle);
+}
+
+
+si64 CZipOutputStream::write(const ui8 * data, si64 size)
+{
+	int ret = zipWriteInFileInZip(handle, (const void*)data, (unsigned)size);
+	
+	if (ret == ZIP_OK)
+		return size;
+	else
+		return 0;
+}
+
+///CZipSaver
+CZipSaver::CZipSaver(std::shared_ptr<CIOApi> api, const std::string & path):
+	ioApi(api),
+	zipApi(ioApi->getApiStructure()),
+	handle(nullptr)	
+{
+	
+	
+	handle = zipOpen2_64(path.c_str(), APPEND_STATUS_CREATE, nullptr, &zipApi);
+	
+	if (handle == nullptr)
+		throw new std::runtime_error("Failed to create archive");
+}
+
+CZipSaver::~CZipSaver()
+{
+	if(handle != nullptr)
+		zipClose(handle, nullptr);
+}
+
+std::unique_ptr<COutputStream> CZipSaver::addFile(const std::string & archiveFilename)
+{
+	if(activeStream != nullptr)
+		throw new std::runtime_error("CZipSaver::addFile: stream already opened");
+	
+	std::unique_ptr<COutputStream> stream(new CZipOutputStream(handle, archiveFilename));
+	
+	activeStream = stream.get();
+	
+	return stream;
+}
+