1 files changed, 83 insertions, 0 deletions
diff --git a/db2/btree/bt_conv.c b/db2/btree/bt_conv.c
new file mode 100644
index 0000000000..537e2f98ec
--- /dev/null
+++ b/db2/btree/bt_conv.c
@@ -0,0 +1,83 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)bt_conv.c	10.3 (Sleepycat) 8/9/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+#endif
+
+#include "db_int.h"
+#include "db_page.h"
+#include "db_swap.h"
+#include "btree.h"
+
+/*
+ * __bam_pgin, __bam_pgout --
+ *	Convert host-specific page layout to/from the host-independent
+ *	format stored on disk.
+ *
+ * PUBLIC: int __bam_pgin __P((db_pgno_t, void *, DBT *));
+ * PUBLIC: int __bam_pgout __P((db_pgno_t, void *, DBT *));
+ */
+int
+__bam_pgin(pg, pp, cookie)
+	db_pgno_t pg;
+	void *pp;
+	DBT *cookie;
+{
+	DB_PGINFO *pginfo;
+
+	pginfo = (DB_PGINFO *)cookie->data;
+	if (!pginfo->needswap)
+		return (0);
+	return (pg == PGNO_METADATA ? __bam_mswap(pp) : __db_pgin(pg, pp));
+}
+
+int
+__bam_pgout(pg, pp, cookie)
+	db_pgno_t pg;
+	void *pp;
+	DBT *cookie;
+{
+	DB_PGINFO *pginfo;
+
+	pginfo = (DB_PGINFO *)cookie->data;
+	if (!pginfo->needswap)
+		return (0);
+	return (pg == PGNO_METADATA ? __bam_mswap(pp) : __db_pgout(pg, pp));
+}
+
+/*
+ * __bam_mswap --
+ *	Swap the bytes on the btree metadata page.
+ *
+ * PUBLIC: int __bam_mswap __P((PAGE *));
+ */
+int
+__bam_mswap(pg)
+	PAGE *pg;
+{
+	u_int8_t *p;
+
+	p = (u_int8_t *)pg;
+	SWAP32(p);		/* lsn.file */
+	SWAP32(p);		/* lsn.offset */
+	SWAP32(p);		/* pgno */
+	SWAP32(p);		/* magic */
+	SWAP32(p);		/* version */
+	SWAP32(p);		/* pagesize */
+	SWAP32(p);		/* maxkey */
+	SWAP32(p);		/* minkey */
+	SWAP32(p);		/* free */
+	SWAP32(p);		/* flags */
+	return (0);
+}