New upstream version 18.0.1+dfsg1

UI/win-update/win-update-helpers.cpp

@@ -0,0 +1,40 @@
+#include "win-update-helpers.hpp"
+
+void FreeProvider(HCRYPTPROV prov)
+{
+	CryptReleaseContext(prov, 0);
+}
+
+void FreeHash(HCRYPTHASH hash)
+{
+	CryptDestroyHash(hash);
+}
+
+void FreeKey(HCRYPTKEY key)
+{
+	CryptDestroyKey(key);
+}
+
+std::string vstrprintf(const char *format, va_list args)
+{
+	if (!format)
+		return std::string();
+
+	std::string str;
+	int size = (int)vsnprintf(nullptr, 0, format, args);
+	str.resize(size);
+	vsnprintf(&str[0], size, format, args);
+	return str;
+}
+
+std::string strprintf(const char *format, ...)
+{
+	std::string str;
+	va_list args;
+
+	va_start(args, format);
+	str = vstrprintf(format, args);
+	va_end(args);
+
+	return str;
+}