* libnix -> libstore.

src/libstore/store.hh

@@ -0,0 +1,72 @@
+#ifndef __STORE_H
+#define __STORE_H
+
+#include <string>
+
+#include "hash.hh"
+#include "db.hh"
+
+using namespace std;
+
+
+/* Open the database environment. */
+void openDB();
+
+/* Create the required database tables. */
+void initDB();
+
+/* Get a transaction object. */
+void createStoreTransaction(Transaction & txn);
+
+/* Copy a path recursively. */
+void copyPath(const Path & src, const Path & dst);
+
+/* Register a successor.  This function accepts a transaction handle
+   so that it can be enclosed in an atomic operation with calls to
+   registerValidPath().  This must be atomic, since if we register a
+   successor for a derivation without registering the paths built in
+   the derivation, we have a successor with dangling pointers, and if
+   we do it in reverse order, we can get an obstructed build (since to
+   rebuild the successor, the outputs paths must not exist). */
+void registerSuccessor(const Transaction & txn,
+    const Path & srcPath, const Path & sucPath);
+
+/* Return the predecessors of the Nix expression stored at the given
+   path. */
+bool querySuccessor(const Path & srcPath, Path & sucPath);
+
+/* Return the predecessors of the Nix expression stored at the given
+   path. */
+Paths queryPredecessors(const Path & sucPath);
+
+/* Register a substitute. */
+void registerSubstitute(const Path & srcPath, const Path & subPath);
+
+/* Return the substitutes expression for the given path. */
+Paths querySubstitutes(const Path & srcPath);
+
+/* Register the validity of a path. */
+void registerValidPath(const Transaction & txn, const Path & path);
+
+/* Unregister the validity of a path. */
+void unregisterValidPath(const Path & path);
+
+/* Checks whether a path is valid. */ 
+bool isValidPath(const Path & path);
+
+/* Copy the contents of a path to the store and register the validity
+   the resulting path.  The resulting path is returned. */
+Path addToStore(const Path & srcPath);
+
+/* Like addToStore, but the path of the output is given, and the
+   contents written to the output path is a regular file containing
+   the given string. */
+void addTextToStore(const Path & dstPath, const string & s);
+
+/* Delete a value from the nixStore directory. */
+void deleteFromStore(const Path & path);
+
+void verifyStore();
+
+
+#endif /* !__STORE_H */