Move relpath() to libpgcommon

This enables non-backend code, such as pg_xlogdump, to use it easily.
The previous location, in src/backend/catalog/catalog.c, made that
essentially impossible because that file depends on many backend-only
facilities; so this needs to live separately.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/include/common/relpath.h b/src/include/common/relpath.h
new file mode 100644
index 00000000000..5b28bd03619
--- /dev/null
+++ b/src/include/common/relpath.h
@@ -0,0 +1,41 @@
+/*-------------------------------------------------------------------------
+ *
+ * relpath.h
+ * 		Declarations for relpath() and friends
+ *
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/common/relpath.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef RELPATH_H
+#define RELPATH_H
+
+/*
+ *	'pgrminclude ignore' needed here because CppAsString2() does not throw
+ *	an error if the symbol is not defined.
+ */
+#include "catalog/catversion.h" /* pgrminclude ignore */
+#include "storage/relfilenode.h"
+
+
+#define OIDCHARS		10		/* max chars printed by %u */
+#define TABLESPACE_VERSION_DIRECTORY	"PG_" PG_MAJORVERSION "_" \
+									CppAsString2(CATALOG_VERSION_NO)
+
+extern const char *forkNames[];
+extern int	forkname_chars(const char *str, ForkNumber *fork);
+extern char *relpathbackend(RelFileNode rnode, BackendId backend,
+			   ForkNumber forknum);
+
+/* First argument is a RelFileNodeBackend */
+#define relpath(rnode, forknum) \
+		relpathbackend((rnode).node, (rnode).backend, (forknum))
+
+/* First argument is a RelFileNode */
+#define relpathperm(rnode, forknum) \
+		relpathbackend((rnode), InvalidBackendId, (forknum))
+
+#endif		/* RELPATH_H */