return json_array_create_2(json_string_create(name), wrapped);
}
+/* Initializes 'atom' with the default value of the given 'type'.
+ *
+ * The default value for an atom is as defined in ovsdb/SPECS:
+ *
+ * - "integer" or "real": 0
+ *
+ * - "boolean": false
+ *
+ * - "string": "" (the empty string)
+ *
+ * - "uuid": 00000000-0000-0000-0000-000000000000
+ *
+ * The caller must eventually arrange for 'atom' to be destroyed (with
+ * ovsdb_atom_destroy()). */
void
ovsdb_atom_init_default(union ovsdb_atom *atom, enum ovsdb_atomic_type type)
{
}
}
+
+/* Returns true if 'atom', which must have the given 'type', has the default
+ * value for that type.
+ *
+ * See ovsdb_atom_init_default() for an explanation of the default value of an
+ * atom. */
bool
ovsdb_atom_is_default(const union ovsdb_atom *atom,
enum ovsdb_atomic_type type)
}
}
+/* Initializes 'new' as a copy of 'old', with the given 'type'.
+ *
+ * The caller must eventually arrange for 'new' to be destroyed (with
+ * ovsdb_atom_destroy()). */
void
ovsdb_atom_clone(union ovsdb_atom *new, const union ovsdb_atom *old,
enum ovsdb_atomic_type type)
}
}
+/* Swaps the contents of 'a' and 'b', which need not have the same type. */
void
ovsdb_atom_swap(union ovsdb_atom *a, union ovsdb_atom *b)
{
*b = tmp;
}
+/* Returns a hash value for 'atom', which has the specified 'type', folding
+ * 'basis' into the calculation. */
uint32_t
ovsdb_atom_hash(const union ovsdb_atom *atom, enum ovsdb_atomic_type type,
uint32_t basis)
}
}
+/* Compares 'a' and 'b', which both have type 'type', and returns a
+ * strcmp()-like result. */
int
ovsdb_atom_compare_3way(const union ovsdb_atom *a,
const union ovsdb_atom *b,
ovsdb_atomic_type_to_string(type));
}
+/* Parses 'json' as an atom of the type described by 'base'. If successful,
+ * returns NULL and initializes 'atom' with the parsed atom. On failure,
+ * returns an error and the contents of 'atom' are indeterminate. The caller
+ * is responsible for freeing the error or the atom that is returned.
+ *
+ * If 'symtab' is nonnull, then named UUIDs in 'symtab' are accepted. Refer to
+ * ovsdb/SPECS information about this and other syntactical details. */
struct ovsdb_error *
ovsdb_atom_from_json(union ovsdb_atom *atom,
const struct ovsdb_base_type *base,
return error;
}
+/* Converts 'atom', of the specified 'type', to JSON format, and returns the
+ * JSON. The caller is responsible for freeing the returned JSON. */
struct json *
ovsdb_atom_to_json(const union ovsdb_atom *atom, enum ovsdb_atomic_type type)
{
* table.
*
* Returns a null pointer if successful, otherwise an error message describing
- * the problem. The caller is responsible for freeing the error.
+ * the problem. On failure, the contents of 'atom' are indeterminate. The
+ * caller is responsible for freeing the atom or the error.
*/
char *
ovsdb_atom_from_string(union ovsdb_atom *atom,
}
}
+/* Initializes 'datum' as an empty datum. (An empty datum can be treated as
+ * any type.) */
void
ovsdb_datum_init_empty(struct ovsdb_datum *datum)
{
datum->values = NULL;
}
+/* Initializes 'datum' as a datum that has the default value for 'type'.
+ *
+ * The default value for a particular type is as defined in ovsdb/SPECS:
+ *
+ * - If n_min is 0, then the default value is the empty set (or map).
+ *
+ * - If n_min is 1, the default value is a single value or a single
+ * key-value pair, whose key and value are the defaults for their
+ * atomic types. (See ovsdb_atom_init_default() for details.)
+ *
+ * - n_min > 1 is invalid. See ovsdb_type_is_valid().
+ */
void
ovsdb_datum_init_default(struct ovsdb_datum *datum,
const struct ovsdb_type *type)
datum->values = alloc_default_atoms(type->value.type, datum->n);
}
+/* Returns true if 'datum', which must have the given 'type', has the default
+ * value for that type.
+ *
+ * See ovsdb_datum_init_default() for an explanation of the default value of a
+ * datum. */
bool
ovsdb_datum_is_default(const struct ovsdb_datum *datum,
const struct ovsdb_type *type)
}
}
+/* Initializes 'new' as a copy of 'old', with the given 'type'.
+ *
+ * The caller must eventually arrange for 'new' to be destroyed (with
+ * ovsdb_datum_destroy()). */
void
ovsdb_datum_clone(struct ovsdb_datum *new, const struct ovsdb_datum *old,
const struct ovsdb_type *type)
free(atoms);
}
+/* Frees the data owned by 'datum', which must have the given 'type'.
+ *
+ * This does not actually call free(datum). If necessary, the caller must be
+ * responsible for that. */
void
ovsdb_datum_destroy(struct ovsdb_datum *datum, const struct ovsdb_type *type)
{
free_data(type->value.type, datum->values, datum->n);
}
+/* Swaps the contents of 'a' and 'b', which need not have the same type. */
void
ovsdb_datum_swap(struct ovsdb_datum *a, struct ovsdb_datum *b)
{
}
}
+/* The keys in an ovsdb_datum must be unique and in sorted order. Most
+ * functions that modify an ovsdb_datum maintain these invariants. For those
+ * that don't, this function checks and restores these invariants for 'datum',
+ * whose keys are of type 'key_type'.
+ *
+ * This function returns NULL if successful, otherwise an error message. The
+ * caller must free the returned error when it is no longer needed. On error,
+ * 'datum' is sorted but not unique. */
struct ovsdb_error *
ovsdb_datum_sort(struct ovsdb_datum *datum, enum ovsdb_atomic_type key_type)
{
}
}
+/* This function is the same as ovsdb_datum_sort(), except that the caller
+ * knows that 'datum' is unique. The operation therefore "cannot fail", so
+ * this function assert-fails if it actually does. */
void
ovsdb_datum_sort_assert(struct ovsdb_datum *datum,
enum ovsdb_atomic_type key_type)
enum ovsdb_atomic_type);
void ovsdb_atom_swap(union ovsdb_atom *, union ovsdb_atom *);
+/* Returns false if ovsdb_atom_destroy() is a no-op when it is applied to an
+ * initialized atom of the given 'type', true if ovsdb_atom_destroy() actually
+ * does something.
+ *
+ * This can be used to avoid calling ovsdb_atom_destroy() for each element in
+ * an array of homogeneous atoms. (It's not worthwhile for a single atom.) */
static inline bool
ovsdb_atom_needs_destruction(enum ovsdb_atomic_type type)
{
return type == OVSDB_TYPE_STRING;
}
+/* Frees the contents of 'atom', which must have the specified 'type'.
+ *
+ * This does not actually call free(atom). If necessary, the caller must be
+ * responsible for that. */
static inline void
ovsdb_atom_destroy(union ovsdb_atom *atom, enum ovsdb_atomic_type type)
{
const union ovsdb_atom *,
enum ovsdb_atomic_type);
+/* Returns true if 'a' and 'b', which are both of type 'type', has the same
+ * contents, false if their contents differ. */
static inline bool ovsdb_atom_equals(const union ovsdb_atom *a,
const union ovsdb_atom *b,
enum ovsdb_atomic_type type)
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