Add MetadataFile / Replicator class and initial IOC-write logic.

src/MetadataFile.h

@@ -0,0 +1,58 @@
+/*
+ * MetadataFile.h
+ */
+#ifndef METADATAFILE_H_
+#define METADATAFILE_H_
+
+#include "Config.h"
+#include "SMLogging.h"
+#include <string>
+#include <sys/types.h>
+#include <stdint.h>
+#include <vector>
+#include <iostream>
+#include <set>
+
+using namespace std;
+
+namespace storagemanager
+{
+
+struct metadataObject {
+    uint64_t offset;
+    uint64_t length;
+    string name;
+    bool operator < (const metadataObject &b) const { return offset < b.offset; }
+};
+
+class MetadataFile
+{
+    public:
+        MetadataFile();
+        MetadataFile(const char* filename);
+        ~MetadataFile();
+
+        void printObjects();
+        // returns the objects needed to update
+        vector<metadataObject> metadataRead(off_t offset, size_t length);
+        // updates the metadatafile with new object
+        int updateMetadata(const char *filename);
+        metadataObject addMetadataObject(const char *filename, size_t length);
+
+        // TBD: this may have to go; there may be no use case where only the uuid needs to change.
+        std::string getNewKeyFromOldKey(const std::string &oldKey);
+        std::string getNewKey(std::string sourceName, size_t offset, size_t length);
+
+    private:
+        Config *mpConfig;
+        SMLogging *mpLogger;
+        int mVersion;
+        int mRevision;
+        size_t mObjectSize;
+        //set<metadataObject> mObjects;
+        vector<metadataObject> mObjects;
+};
+
+}
+
+#endif /* METADATAFILE_H_ */