+/* Routine flags. */
+#define R_CURSOR 1 /* del, put, seq */
+#define __R_UNUSED 2 /* UNUSED */
+#define R_FIRST 3 /* seq */
+#define R_IAFTER 4 /* put (RECNO) */
+#define R_IBEFORE 5 /* put (RECNO) */
+#define R_LAST 6 /* seq (BTREE, RECNO) */
+#define R_NEXT 7 /* seq */
+#define R_NOOVERWRITE 8 /* put */
+#define R_PREV 9 /* seq (BTREE, RECNO) */
+#define R_SETCURSOR 10 /* put (RECNO) */
+#define R_RECNOSYNC 11 /* sync (RECNO) */
+
+typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
+
+#define __USE_OPEN_FLAGS \
+ (O_CREAT|O_EXCL|O_EXLOCK|O_RDONLY|O_RDWR|O_SHLOCK|O_TRUNC)
+
+/* Access method description structure. */
+typedef struct __db {
+ DBTYPE type; /* underlying db type */
+ int (*close) __P((struct __db *));
+ int (*del) __P((const struct __db *, const DBT *, u_int));
+ int (*fd) __P((const struct __db *));
+ int (*get) __P((const struct __db *, const DBT *, DBT *, u_int));
+ int (*put) __P((const struct __db *, DBT *, const DBT *, u_int));
+ int (*seq) __P((const struct __db *, DBT *, DBT *, u_int));
+ int (*sync) __P((const struct __db *, u_int));
+ void *internal; /* access method private */