Add ItemStack key-value meta storage

1 files changed, 43 insertions, 0 deletions

diff --git a/src/itemstackmetadata.cpp b/src/itemstackmetadata.cpp
new file mode 100644
index 000000000..c3d602245
--- /dev/null
+++ b/src/itemstackmetadata.cpp
@@ -0,0 +1,43 @@
+#include "itemstackmetadata.h"
+#include "util/serialize.h"
+#include "util/strfnd.h"
+
+#define DESERIALIZE_START '\x01'
+#define DESERIALIZE_KV_DELIM '\x02'
+#define DESERIALIZE_PAIR_DELIM '\x03'
+#define DESERIALIZE_START_STR "\x01"
+#define DESERIALIZE_KV_DELIM_STR "\x02"
+#define DESERIALIZE_PAIR_DELIM_STR "\x03"
+
+void ItemStackMetadata::serialize(std::ostream &os) const
+{
+	std::ostringstream os2;
+	os2 << DESERIALIZE_START;
+	for (StringMap::const_iterator
+			it = m_stringvars.begin();
+			it != m_stringvars.end(); ++it) {
+		os2 << it->first << DESERIALIZE_KV_DELIM
+		    << it->second << DESERIALIZE_PAIR_DELIM;
+	}
+	os << serializeJsonStringIfNeeded(os2.str());
+}
+
+void ItemStackMetadata::deSerialize(std::istream &is)
+{
+	std::string in = deSerializeJsonStringIfNeeded(is);
+
+	m_stringvars.clear();
+
+	if (!in.empty() && in[0] == DESERIALIZE_START) {
+		Strfnd fnd(in);
+		fnd.to(1);
+		while (!fnd.at_end()) {
+			std::string name = fnd.next(DESERIALIZE_KV_DELIM_STR);
+			std::string var  = fnd.next(DESERIALIZE_PAIR_DELIM_STR);
+			m_stringvars[name] = var;
+		}
+	} else {
+		// BACKWARDS COMPATIBILITY
+		m_stringvars[""] = in;
+	}
+}