-/* Copyright (c) 2009, 2010 Nicira Networks
+/* Copyright (c) 2009, 2010, 2011, 2012, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "ovsdb-data.h"
-#include <assert.h>
#include <ctype.h>
#include <float.h>
#include <inttypes.h>
#include "dynamic-string.h"
#include "hash.h"
+#include "ovs-thread.h"
#include "ovsdb-error.h"
+#include "ovsdb-parser.h"
#include "json.h"
#include "shash.h"
+#include "smap.h"
#include "sort.h"
+#include "unicode.h"
static struct json *
wrap_json(const char *name, struct json *wrapped)
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 RFC 7047:
+ *
+ * - "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)
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
atom->integer = 0;
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
+ }
+}
+
+/* Returns a read-only atom of the given 'type' that has the default value for
+ * 'type'. The caller must not modify or free the returned atom.
+ *
+ * See ovsdb_atom_init_default() for an explanation of the default value of an
+ * atom. */
+const union ovsdb_atom *
+ovsdb_atom_default(enum ovsdb_atomic_type type)
+{
+ static union ovsdb_atom default_atoms[OVSDB_N_TYPES];
+ static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
+
+ if (ovsthread_once_start(&once)) {
+ int i;
+
+ for (i = 0; i < OVSDB_N_TYPES; i++) {
+ if (i != OVSDB_TYPE_VOID) {
+ ovsdb_atom_init_default(&default_atoms[i], i);
+ }
+ }
+ ovsthread_once_done(&once);
}
+
+ ovs_assert(ovsdb_atomic_type_is_valid(type));
+ return &default_atoms[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)
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
return atom->integer == 0;
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
}
+/* 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)
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
new->integer = old->integer;
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
}
+/* 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)
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
return hash_int(atom->integer, basis);
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
}
+/* 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,
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
return a->integer < b->integer ? -1 : a->integer > b->integer;
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
}
|| (name && strcmp(json->u.array.elems[0]->u.string, name))
|| json->u.array.elems[1]->type != value_type)
{
+ *value = NULL;
return ovsdb_syntax_error(json, NULL, "expected [\"%s\", <%s>]", name,
json_type_to_string(value_type));
}
return NULL;
}
-static struct ovsdb_error *
-ovsdb_atom_parse_uuid(struct uuid *uuid, const struct json *json,
- const struct ovsdb_symbol_table *symtab)
- WARN_UNUSED_RESULT;
+static void
+ovsdb_symbol_referenced(struct ovsdb_symbol *symbol,
+ const struct ovsdb_base_type *base)
+{
+ ovs_assert(base->type == OVSDB_TYPE_UUID);
-static struct ovsdb_error *
+ if (base->u.uuid.refTableName) {
+ switch (base->u.uuid.refType) {
+ case OVSDB_REF_STRONG:
+ symbol->strong_ref = true;
+ break;
+ case OVSDB_REF_WEAK:
+ symbol->weak_ref = true;
+ break;
+ }
+ }
+}
+
+static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
ovsdb_atom_parse_uuid(struct uuid *uuid, const struct json *json,
- const struct ovsdb_symbol_table *symtab)
+ struct ovsdb_symbol_table *symtab,
+ const struct ovsdb_base_type *base)
{
struct ovsdb_error *error0;
const struct json *value;
error1 = unwrap_json(json, "named-uuid", JSON_STRING, &value);
if (!error1) {
- const char *name = json_string(value);
- const struct ovsdb_symbol *symbol;
+ struct ovsdb_symbol *symbol;
ovsdb_error_destroy(error0);
-
- symbol = ovsdb_symbol_table_get(symtab, name);
- if (symbol) {
- *uuid = symbol->uuid;
- return NULL;
- } else {
- return ovsdb_syntax_error(json, NULL,
- "unknown named-uuid \"%s\"", name);
+ if (!ovsdb_parser_is_id(json_string(value))) {
+ return ovsdb_syntax_error(json, NULL, "named-uuid string is "
+ "not a valid <id>");
}
+
+ symbol = ovsdb_symbol_table_insert(symtab, json_string(value));
+ *uuid = symbol->uuid;
+ ovsdb_symbol_referenced(symbol, base);
+ return NULL;
}
ovsdb_error_destroy(error1);
}
return error0;
}
-struct ovsdb_error *
-ovsdb_atom_from_json(union ovsdb_atom *atom, enum ovsdb_atomic_type type,
- const struct json *json,
- const struct ovsdb_symbol_table *symtab)
+static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
+ovsdb_atom_from_json__(union ovsdb_atom *atom,
+ const struct ovsdb_base_type *base,
+ const struct json *json,
+ struct ovsdb_symbol_table *symtab)
{
+ enum ovsdb_atomic_type type = base->type;
+
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
if (json->type == JSON_INTEGER) {
break;
case OVSDB_TYPE_UUID:
- return ovsdb_atom_parse_uuid(&atom->uuid, json, symtab);
+ return ovsdb_atom_parse_uuid(&atom->uuid, json, symtab, base);
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
return ovsdb_syntax_error(json, NULL, "expected %s",
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.
+ *
+ * Violations of constraints expressed by 'base' are treated as errors.
+ *
+ * If 'symtab' is nonnull, then named UUIDs in 'symtab' are accepted. Refer to
+ * RFC 7047 for information about this, and for the syntax that this function
+ * accepts. If 'base' is a reference and a symbol is parsed, then the symbol's
+ * 'strong_ref' or 'weak_ref' member is set to true, as appropriate. */
+struct ovsdb_error *
+ovsdb_atom_from_json(union ovsdb_atom *atom,
+ const struct ovsdb_base_type *base,
+ const struct json *json,
+ struct ovsdb_symbol_table *symtab)
+{
+ struct ovsdb_error *error;
+
+ error = ovsdb_atom_from_json__(atom, base, json, symtab);
+ if (error) {
+ return error;
+ }
+
+ error = ovsdb_atom_check_constraints(atom, base);
+ if (error) {
+ ovsdb_atom_destroy(atom, base->type);
+ }
+ return error;
+}
+
+/* Converts 'atom', of the specified 'type', to JSON format, and returns the
+ * JSON. The caller is responsible for freeing the returned JSON.
+ *
+ * Refer to RFC 7047 for the format of the JSON that this function produces. */
struct json *
ovsdb_atom_to_json(const union ovsdb_atom *atom, enum ovsdb_atomic_type type)
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
return json_integer_create(atom->integer);
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
}
-/* Initializes 'atom' to a value of the given 'type' parsed from 's', which
- * takes one of the following forms:
- *
- * - OVSDB_TYPE_INTEGER: A decimal integer optionally preceded by a sign.
- *
- * - OVSDB_TYPE_REAL: A floating-point number in the format accepted by
- * strtod().
- *
- * - OVSDB_TYPE_BOOLEAN: "true", "yes", "on", "1" for true, or "false",
- * "no", "off", or "0" for false.
- *
- * - OVSDB_TYPE_STRING: A JSON string if it begins with a quote, otherwise
- * an arbitrary string.
- *
- * - OVSDB_TYPE_UUID: A UUID in RFC 4122 format.
- *
- * Returns a null pointer if successful, otherwise an error message describing
- * the problem. The caller is responsible for freeing the error.
- */
-char *
-ovsdb_atom_from_string(union ovsdb_atom *atom, enum ovsdb_atomic_type type,
- const char *s)
+static char *
+ovsdb_atom_from_string__(union ovsdb_atom *atom,
+ const struct ovsdb_base_type *base, const char *s,
+ struct ovsdb_symbol_table *symtab)
{
+ enum ovsdb_atomic_type type = base->type;
+
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER: {
long long int integer;
break;
case OVSDB_TYPE_UUID:
- if (!uuid_from_string(&atom->uuid, s)) {
+ if (*s == '@') {
+ struct ovsdb_symbol *symbol = ovsdb_symbol_table_insert(symtab, s);
+ atom->uuid = symbol->uuid;
+ ovsdb_symbol_referenced(symbol, base);
+ } else if (!uuid_from_string(&atom->uuid, s)) {
return xasprintf("\"%s\" is not a valid UUID", s);
}
break;
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
}
return NULL;
}
+/* Initializes 'atom' to a value of type 'base' parsed from 's', which takes
+ * one of the following forms:
+ *
+ * - OVSDB_TYPE_INTEGER: A decimal integer optionally preceded by a sign.
+ *
+ * - OVSDB_TYPE_REAL: A floating-point number in the format accepted by
+ * strtod().
+ *
+ * - OVSDB_TYPE_BOOLEAN: "true", "yes", "on", "1" for true, or "false",
+ * "no", "off", or "0" for false.
+ *
+ * - OVSDB_TYPE_STRING: A JSON string if it begins with a quote, otherwise
+ * an arbitrary string.
+ *
+ * - OVSDB_TYPE_UUID: A UUID in RFC 4122 format. If 'symtab' is nonnull,
+ * then an identifier beginning with '@' is also acceptable. If the
+ * named identifier is already in 'symtab', then the associated UUID is
+ * used; otherwise, a new, random UUID is used and added to the symbol
+ * table. If 'base' is a reference and a symbol is parsed, then the
+ * symbol's 'strong_ref' or 'weak_ref' member is set to true, as
+ * appropriate.
+ *
+ * Returns a null pointer if successful, otherwise an error message describing
+ * 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,
+ const struct ovsdb_base_type *base, const char *s,
+ struct ovsdb_symbol_table *symtab)
+{
+ struct ovsdb_error *error;
+ char *msg;
+
+ msg = ovsdb_atom_from_string__(atom, base, s, symtab);
+ if (msg) {
+ return msg;
+ }
+
+ error = ovsdb_atom_check_constraints(atom, base);
+ if (error) {
+ ovsdb_atom_destroy(atom, base->type);
+ msg = ovsdb_error_to_string(error);
+ ovsdb_error_destroy(error);
+ }
+ return msg;
+}
+
static bool
string_needs_quotes(const char *s)
{
{
switch (type) {
case OVSDB_TYPE_VOID:
- NOT_REACHED();
+ OVS_NOT_REACHED();
case OVSDB_TYPE_INTEGER:
ds_put_format(out, "%"PRId64, atom->integer);
case OVSDB_N_TYPES:
default:
- NOT_REACHED();
+ OVS_NOT_REACHED();
+ }
+}
+
+/* Appends 'atom' (which has the given 'type') to 'out', in a bare string
+ * format that cannot be parsed uniformly back into a datum but is easier for
+ * shell scripts, etc., to deal with. */
+void
+ovsdb_atom_to_bare(const union ovsdb_atom *atom, enum ovsdb_atomic_type type,
+ struct ds *out)
+{
+ if (type == OVSDB_TYPE_STRING) {
+ ds_put_cstr(out, atom->string);
+ } else {
+ ovsdb_atom_to_string(atom, type, out);
+ }
+}
+
+static struct ovsdb_error *
+check_string_constraints(const char *s,
+ const struct ovsdb_string_constraints *c)
+{
+ size_t n_chars;
+ char *msg;
+
+ msg = utf8_validate(s, &n_chars);
+ if (msg) {
+ struct ovsdb_error *error;
+
+ error = ovsdb_error("constraint violation",
+ "not a valid UTF-8 string: %s", msg);
+ free(msg);
+ return error;
+ }
+
+ if (n_chars < c->minLen) {
+ return ovsdb_error(
+ "constraint violation",
+ "\"%s\" length %"PRIuSIZE" is less than minimum allowed "
+ "length %u", s, n_chars, c->minLen);
+ } else if (n_chars > c->maxLen) {
+ return ovsdb_error(
+ "constraint violation",
+ "\"%s\" length %"PRIuSIZE" is greater than maximum allowed "
+ "length %u", s, n_chars, c->maxLen);
+ }
+
+ return NULL;
+}
+
+/* Checks whether 'atom' meets the constraints (if any) defined in 'base'.
+ * (base->type must specify 'atom''s type.) Returns a null pointer if the
+ * constraints are met, otherwise an error that explains the violation.
+ *
+ * Checking UUID constraints is deferred to transaction commit time, so this
+ * function does nothing for UUID constraints. */
+struct ovsdb_error *
+ovsdb_atom_check_constraints(const union ovsdb_atom *atom,
+ const struct ovsdb_base_type *base)
+{
+ if (base->enum_
+ && ovsdb_datum_find_key(base->enum_, atom, base->type) == UINT_MAX) {
+ struct ovsdb_error *error;
+ struct ds actual = DS_EMPTY_INITIALIZER;
+ struct ds valid = DS_EMPTY_INITIALIZER;
+
+ ovsdb_atom_to_string(atom, base->type, &actual);
+ ovsdb_datum_to_string(base->enum_,
+ ovsdb_base_type_get_enum_type(base->type),
+ &valid);
+ error = ovsdb_error("constraint violation",
+ "%s is not one of the allowed values (%s)",
+ ds_cstr(&actual), ds_cstr(&valid));
+ ds_destroy(&actual);
+ ds_destroy(&valid);
+
+ return error;
+ }
+
+ switch (base->type) {
+ case OVSDB_TYPE_VOID:
+ OVS_NOT_REACHED();
+
+ case OVSDB_TYPE_INTEGER:
+ if (atom->integer >= base->u.integer.min
+ && atom->integer <= base->u.integer.max) {
+ return NULL;
+ } else if (base->u.integer.min != INT64_MIN) {
+ if (base->u.integer.max != INT64_MAX) {
+ return ovsdb_error("constraint violation",
+ "%"PRId64" is not in the valid range "
+ "%"PRId64" to %"PRId64" (inclusive)",
+ atom->integer,
+ base->u.integer.min, base->u.integer.max);
+ } else {
+ return ovsdb_error("constraint violation",
+ "%"PRId64" is less than minimum allowed "
+ "value %"PRId64,
+ atom->integer, base->u.integer.min);
+ }
+ } else {
+ return ovsdb_error("constraint violation",
+ "%"PRId64" is greater than maximum allowed "
+ "value %"PRId64,
+ atom->integer, base->u.integer.max);
+ }
+ OVS_NOT_REACHED();
+
+ case OVSDB_TYPE_REAL:
+ if (atom->real >= base->u.real.min && atom->real <= base->u.real.max) {
+ return NULL;
+ } else if (base->u.real.min != -DBL_MAX) {
+ if (base->u.real.max != DBL_MAX) {
+ return ovsdb_error("constraint violation",
+ "%.*g is not in the valid range "
+ "%.*g to %.*g (inclusive)",
+ DBL_DIG, atom->real,
+ DBL_DIG, base->u.real.min,
+ DBL_DIG, base->u.real.max);
+ } else {
+ return ovsdb_error("constraint violation",
+ "%.*g is less than minimum allowed "
+ "value %.*g",
+ DBL_DIG, atom->real,
+ DBL_DIG, base->u.real.min);
+ }
+ } else {
+ return ovsdb_error("constraint violation",
+ "%.*g is greater than maximum allowed "
+ "value %.*g",
+ DBL_DIG, atom->real,
+ DBL_DIG, base->u.real.max);
+ }
+ OVS_NOT_REACHED();
+
+ case OVSDB_TYPE_BOOLEAN:
+ return NULL;
+
+ case OVSDB_TYPE_STRING:
+ return check_string_constraints(atom->string, &base->u.string);
+
+ case OVSDB_TYPE_UUID:
+ return NULL;
+
+ case OVSDB_N_TYPES:
+ default:
+ OVS_NOT_REACHED();
}
}
\f
}
}
+/* 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 RFC 7047:
+ *
+ * - 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->n = type->n_min;
- datum->keys = alloc_default_atoms(type->key_type, datum->n);
- datum->values = alloc_default_atoms(type->value_type, datum->n);
+ datum->keys = alloc_default_atoms(type->key.type, datum->n);
+ datum->values = alloc_default_atoms(type->value.type, datum->n);
}
+/* Returns a read-only datum of the given 'type' that has the default value for
+ * 'type'. The caller must not modify or free the returned datum.
+ *
+ * See ovsdb_datum_init_default() for an explanation of the default value of a
+ * datum. */
+const struct ovsdb_datum *
+ovsdb_datum_default(const struct ovsdb_type *type)
+{
+ if (type->n_min == 0) {
+ static const struct ovsdb_datum empty;
+ return ∅
+ } else if (type->n_min == 1) {
+ static struct ovsdb_datum default_data[OVSDB_N_TYPES][OVSDB_N_TYPES];
+ struct ovsdb_datum *d;
+ int kt = type->key.type;
+ int vt = type->value.type;
+
+ ovs_assert(ovsdb_type_is_valid(type));
+
+ d = &default_data[kt][vt];
+ if (!d->n) {
+ d->n = 1;
+ d->keys = CONST_CAST(union ovsdb_atom *, ovsdb_atom_default(kt));
+ if (vt != OVSDB_TYPE_VOID) {
+ d->values = CONST_CAST(union ovsdb_atom *,
+ ovsdb_atom_default(vt));
+ }
+ }
+ return d;
+ } else {
+ OVS_NOT_REACHED();
+ }
+}
+
+/* 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)
return false;
}
for (i = 0; i < datum->n; i++) {
- if (!ovsdb_atom_is_default(&datum->keys[i], type->key_type)) {
+ if (!ovsdb_atom_is_default(&datum->keys[i], type->key.type)) {
return false;
}
- if (type->value_type != OVSDB_TYPE_VOID
- && !ovsdb_atom_is_default(&datum->values[i], type->value_type)) {
+ if (type->value.type != OVSDB_TYPE_VOID
+ && !ovsdb_atom_is_default(&datum->values[i], type->value.type)) {
return false;
}
}
}
}
+/* 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)
{
unsigned int n = old->n;
new->n = n;
- new->keys = clone_atoms(old->keys, type->key_type, n);
- new->values = clone_atoms(old->values, type->value_type, n);
+ new->keys = clone_atoms(old->keys, type->key.type, n);
+ new->values = clone_atoms(old->values, type->value.type, n);
}
static void
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->key_type, datum->keys, datum->n);
- free_data(type->value_type, datum->values, datum->n);
+ free_data(type->key.type, datum->keys, datum->n);
+ 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)
{
}
struct ovsdb_datum_sort_cbdata {
- const struct ovsdb_type *type;
+ enum ovsdb_atomic_type key_type;
+ enum ovsdb_atomic_type value_type;
struct ovsdb_datum *datum;
};
ovsdb_datum_sort_compare_cb(size_t a, size_t b, void *cbdata_)
{
struct ovsdb_datum_sort_cbdata *cbdata = cbdata_;
+ int retval;
- return ovsdb_atom_compare_3way(&cbdata->datum->keys[a],
- &cbdata->datum->keys[b],
- cbdata->type->key_type);
+ retval = ovsdb_atom_compare_3way(&cbdata->datum->keys[a],
+ &cbdata->datum->keys[b],
+ cbdata->key_type);
+ if (retval || cbdata->value_type == OVSDB_TYPE_VOID) {
+ return retval;
+ }
+
+ return ovsdb_atom_compare_3way(&cbdata->datum->values[a],
+ &cbdata->datum->values[b],
+ cbdata->value_type);
}
static void
struct ovsdb_datum_sort_cbdata *cbdata = cbdata_;
ovsdb_atom_swap(&cbdata->datum->keys[a], &cbdata->datum->keys[b]);
- if (cbdata->type->value_type != OVSDB_TYPE_VOID) {
+ if (cbdata->datum->values) {
ovsdb_atom_swap(&cbdata->datum->values[a], &cbdata->datum->values[b]);
}
}
+static void
+ovsdb_datum_sort__(struct ovsdb_datum *datum, enum ovsdb_atomic_type key_type,
+ enum ovsdb_atomic_type value_type)
+{
+ struct ovsdb_datum_sort_cbdata cbdata;
+
+ cbdata.key_type = key_type;
+ cbdata.value_type = value_type;
+ cbdata.datum = datum;
+ sort(datum->n, ovsdb_datum_sort_compare_cb, ovsdb_datum_sort_swap_cb,
+ &cbdata);
+}
+
+/* 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, const struct ovsdb_type *type)
+ovsdb_datum_sort(struct ovsdb_datum *datum, enum ovsdb_atomic_type key_type)
{
+ size_t i;
+
if (datum->n < 2) {
return NULL;
- } else {
- struct ovsdb_datum_sort_cbdata cbdata;
- size_t i;
+ }
- cbdata.type = type;
- cbdata.datum = datum;
- sort(datum->n, ovsdb_datum_sort_compare_cb, ovsdb_datum_sort_swap_cb,
- &cbdata);
-
- for (i = 0; i < datum->n - 1; i++) {
- if (ovsdb_atom_equals(&datum->keys[i], &datum->keys[i + 1],
- type->key_type)) {
- if (ovsdb_type_is_map(type)) {
- return ovsdb_error(NULL, "map contains duplicate key");
- } else {
- return ovsdb_error(NULL, "set contains duplicate");
- }
+ ovsdb_datum_sort__(datum, key_type, OVSDB_TYPE_VOID);
+
+ for (i = 0; i < datum->n - 1; i++) {
+ if (ovsdb_atom_equals(&datum->keys[i], &datum->keys[i + 1],
+ key_type)) {
+ if (datum->values) {
+ return ovsdb_error(NULL, "map contains duplicate key");
+ } else {
+ return ovsdb_error(NULL, "set contains duplicate");
}
}
+ }
+ return NULL;
+}
- return NULL;
+/* 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)
+{
+ struct ovsdb_error *error = ovsdb_datum_sort(datum, key_type);
+ if (error) {
+ OVS_NOT_REACHED();
+ }
+}
+
+/* This is similar to ovsdb_datum_sort(), except that it drops duplicate keys
+ * instead of reporting an error. In a map type, the smallest value among a
+ * group of duplicate pairs is retained and the others are dropped.
+ *
+ * Returns the number of keys (or pairs) that were dropped. */
+size_t
+ovsdb_datum_sort_unique(struct ovsdb_datum *datum,
+ enum ovsdb_atomic_type key_type,
+ enum ovsdb_atomic_type value_type)
+{
+ size_t src, dst;
+
+ if (datum->n < 2) {
+ return 0;
+ }
+
+ ovsdb_datum_sort__(datum, key_type, value_type);
+
+ dst = 1;
+ for (src = 1; src < datum->n; src++) {
+ if (ovsdb_atom_equals(&datum->keys[src], &datum->keys[dst - 1],
+ key_type)) {
+ ovsdb_atom_destroy(&datum->keys[src], key_type);
+ if (value_type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_destroy(&datum->values[src], value_type);
+ }
+ } else {
+ if (src != dst) {
+ datum->keys[dst] = datum->keys[src];
+ if (value_type != OVSDB_TYPE_VOID) {
+ datum->values[dst] = datum->values[src];
+ }
+ }
+ dst++;
+ }
}
+ datum->n = dst;
+ return datum->n - src;
}
+/* Checks that each of the atoms in 'datum' conforms to the constraints
+ * specified by its 'type'. Returns an error if a constraint is violated,
+ * otherwise a null pointer.
+ *
+ * This function is not commonly useful because the most ordinary way to obtain
+ * a datum is ultimately via ovsdb_atom_from_string() or
+ * ovsdb_atom_from_json(), which check constraints themselves. */
struct ovsdb_error *
-ovsdb_datum_from_json(struct ovsdb_datum *datum,
- const struct ovsdb_type *type,
- const struct json *json,
- const struct ovsdb_symbol_table *symtab)
+ovsdb_datum_check_constraints(const struct ovsdb_datum *datum,
+ const struct ovsdb_type *type)
{
struct ovsdb_error *error;
+ unsigned int i;
- if (ovsdb_type_is_scalar(type)) {
- datum->n = 1;
- datum->keys = xmalloc(sizeof *datum->keys);
- datum->values = NULL;
-
- error = ovsdb_atom_from_json(&datum->keys[0], type->key_type,
- json, symtab);
+ for (i = 0; i < datum->n; i++) {
+ error = ovsdb_atom_check_constraints(&datum->keys[i], &type->key);
if (error) {
- free(datum->keys);
+ return error;
}
- return error;
- } else {
+ }
+
+ if (type->value.type != OVSDB_TYPE_VOID) {
+ for (i = 0; i < datum->n; i++) {
+ error = ovsdb_atom_check_constraints(&datum->values[i],
+ &type->value);
+ if (error) {
+ return error;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+static struct ovsdb_error *
+ovsdb_datum_from_json__(struct ovsdb_datum *datum,
+ const struct ovsdb_type *type,
+ const struct json *json,
+ struct ovsdb_symbol_table *symtab)
+{
+ struct ovsdb_error *error;
+
+ if (ovsdb_type_is_map(type)
+ || (json->type == JSON_ARRAY
+ && json->u.array.n > 0
+ && json->u.array.elems[0]->type == JSON_STRING
+ && !strcmp(json->u.array.elems[0]->u.string, "set"))) {
bool is_map = ovsdb_type_is_map(type);
const char *class = is_map ? "map" : "set";
const struct json *inner;
unsigned int i;
size_t n;
- assert(is_map || ovsdb_type_is_set(type));
-
error = unwrap_json(json, class, JSON_ARRAY, &inner);
if (error) {
return error;
n = inner->u.array.n;
if (n < type->n_min || n > type->n_max) {
return ovsdb_syntax_error(json, NULL, "%s must have %u to "
- "%u members but %zu are present",
+ "%u members but %"PRIuSIZE" are present",
class, type->n_min, type->n_max, n);
}
}
}
- error = ovsdb_atom_from_json(&datum->keys[i], type->key_type,
+ error = ovsdb_atom_from_json(&datum->keys[i], &type->key,
key, symtab);
if (error) {
goto error;
if (is_map) {
error = ovsdb_atom_from_json(&datum->values[i],
- type->value_type, value, symtab);
+ &type->value, value, symtab);
if (error) {
- ovsdb_atom_destroy(&datum->keys[i], type->key_type);
+ ovsdb_atom_destroy(&datum->keys[i], type->key.type);
goto error;
}
}
datum->n++;
}
+ return NULL;
+
+ error:
+ ovsdb_datum_destroy(datum, type);
+ return error;
+ } else {
+ datum->n = 1;
+ datum->keys = xmalloc(sizeof *datum->keys);
+ datum->values = NULL;
- error = ovsdb_datum_sort(datum, type);
+ error = ovsdb_atom_from_json(&datum->keys[0], &type->key,
+ json, symtab);
if (error) {
- goto error;
+ free(datum->keys);
}
+ return error;
+ }
+}
- return NULL;
+/* Parses 'json' as a datum of the type described by 'type'. If successful,
+ * returns NULL and initializes 'datum' with the parsed datum. On failure,
+ * returns an error and the contents of 'datum' are indeterminate. The caller
+ * is responsible for freeing the error or the datum that is returned.
+ *
+ * Violations of constraints expressed by 'type' are treated as errors.
+ *
+ * If 'symtab' is nonnull, then named UUIDs in 'symtab' are accepted. Refer to
+ * RFC 7047 for information about this, and for the syntax that this function
+ * accepts. */
+struct ovsdb_error *
+ovsdb_datum_from_json(struct ovsdb_datum *datum,
+ const struct ovsdb_type *type,
+ const struct json *json,
+ struct ovsdb_symbol_table *symtab)
+{
+ struct ovsdb_error *error;
- error:
- ovsdb_datum_destroy(datum, type);
+ error = ovsdb_datum_from_json__(datum, type, json, symtab);
+ if (error) {
return error;
}
+
+ error = ovsdb_datum_sort(datum, type->key.type);
+ if (error) {
+ ovsdb_datum_destroy(datum, type);
+ }
+ return error;
}
+/* Parses 'json' as a datum of the type described by 'type' for internal
+ * use. This function is similar to 'ovsdb_datum_from_json', except the
+ * member size of set or map is not checked.
+ *
+ * The datum generated should be used then discard. It is not suitable
+ * for storing into IDL because of the possible member size violation. */
+struct ovsdb_error *
+ovsdb_transient_datum_from_json(struct ovsdb_datum *datum,
+ const struct ovsdb_type *type,
+ const struct json *json)
+{
+ struct ovsdb_type relaxed_type = *type;
+
+ relaxed_type.n_min = 0;
+ relaxed_type.n_max = UINT_MAX;
+
+ return ovsdb_datum_from_json(datum, &relaxed_type, json, NULL);
+}
+
+/* Converts 'datum', of the specified 'type', to JSON format, and returns the
+ * JSON. The caller is responsible for freeing the returned JSON.
+ *
+ * 'type' constraints on datum->n are ignored.
+ *
+ * Refer to RFC 7047 for the format of the JSON that this function produces. */
struct json *
ovsdb_datum_to_json(const struct ovsdb_datum *datum,
const struct ovsdb_type *type)
{
- /* These tests somewhat tolerate a 'datum' that does not exactly match
- * 'type', in particular a datum with 'n' not in the allowed range. */
- if (datum->n == 1 && ovsdb_type_is_scalar(type)) {
- return ovsdb_atom_to_json(&datum->keys[0], type->key_type);
- } else if (type->value_type == OVSDB_TYPE_VOID) {
+ if (ovsdb_type_is_map(type)) {
struct json **elems;
size_t i;
elems = xmalloc(datum->n * sizeof *elems);
for (i = 0; i < datum->n; i++) {
- elems[i] = ovsdb_atom_to_json(&datum->keys[i], type->key_type);
+ elems[i] = json_array_create_2(
+ ovsdb_atom_to_json(&datum->keys[i], type->key.type),
+ ovsdb_atom_to_json(&datum->values[i], type->value.type));
}
- return wrap_json("set", json_array_create(elems, datum->n));
+ return wrap_json("map", json_array_create(elems, datum->n));
+ } else if (datum->n == 1) {
+ return ovsdb_atom_to_json(&datum->keys[0], type->key.type);
} else {
struct json **elems;
size_t i;
elems = xmalloc(datum->n * sizeof *elems);
for (i = 0; i < datum->n; i++) {
- elems[i] = json_array_create_2(
- ovsdb_atom_to_json(&datum->keys[i], type->key_type),
- ovsdb_atom_to_json(&datum->values[i], type->value_type));
+ elems[i] = ovsdb_atom_to_json(&datum->keys[i], type->key.type);
}
- return wrap_json("map", json_array_create(elems, datum->n));
+ return wrap_json("set", json_array_create(elems, datum->n));
}
}
}
static char *
-parse_atom_token(const char **s, enum ovsdb_atomic_type type,
- union ovsdb_atom *atom)
+parse_atom_token(const char **s, const struct ovsdb_base_type *base,
+ union ovsdb_atom *atom, struct ovsdb_symbol_table *symtab)
{
char *token, *error;
error = ovsdb_token_parse(s, &token);
if (!error) {
- error = ovsdb_atom_from_string(atom, type, token);
+ error = ovsdb_atom_from_string(atom, base, token, symtab);
free(token);
}
return error;
}
-
static char *
parse_key_value(const char **s, const struct ovsdb_type *type,
- union ovsdb_atom *key, union ovsdb_atom *value)
+ union ovsdb_atom *key, union ovsdb_atom *value,
+ struct ovsdb_symbol_table *symtab)
{
const char *start = *s;
char *error;
- error = parse_atom_token(s, type->key_type, key);
- if (!error && type->value_type != OVSDB_TYPE_VOID) {
+ error = parse_atom_token(s, &type->key, key, symtab);
+ if (!error && type->value.type != OVSDB_TYPE_VOID) {
*s = skip_spaces(*s);
if (**s == '=') {
(*s)++;
*s = skip_spaces(*s);
- error = parse_atom_token(s, type->value_type, value);
+ error = parse_atom_token(s, &type->value, value, symtab);
} else {
error = xasprintf("%s: syntax error at \"%c\" expecting \"=\"",
start, **s);
}
if (error) {
- ovsdb_atom_destroy(key, type->key_type);
+ ovsdb_atom_destroy(key, type->key.type);
}
}
return error;
free_key_value(const struct ovsdb_type *type,
union ovsdb_atom *key, union ovsdb_atom *value)
{
- ovsdb_atom_destroy(key, type->key_type);
- if (type->value_type != OVSDB_TYPE_VOID) {
- ovsdb_atom_destroy(value, type->value_type);
+ ovsdb_atom_destroy(key, type->key.type);
+ if (type->value.type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_destroy(value, type->value.type);
}
}
* or, for a map, '='-delimited pairs of atoms. Each atom must in a format
* acceptable to ovsdb_atom_from_string(). Optionally, a set may be enclosed
* in "[]" or a map in "{}"; for an empty set or map these punctuators are
- * required. */
+ * required.
+ *
+ * Optionally, a symbol table may be supplied as 'symtab'. It is passed to
+ * ovsdb_atom_to_string(). */
char *
ovsdb_datum_from_string(struct ovsdb_datum *datum,
- const struct ovsdb_type *type, const char *s)
+ const struct ovsdb_type *type, const char *s,
+ struct ovsdb_symbol_table *symtab)
{
bool is_map = ovsdb_type_is_map(type);
struct ovsdb_error *dberror;
union ovsdb_atom key, value;
if (ovsdb_token_is_delim(*p)) {
+ char *type_str = ovsdb_type_to_english(type);
error = xasprintf("%s: unexpected \"%c\" parsing %s",
- s, *p, ovsdb_type_to_english(type));
+ s, *p, type_str);
+ free(type_str);
goto error;
}
/* Add to datum. */
- error = parse_key_value(&p, type, &key, &value);
+ error = parse_key_value(&p, type, &key, &value, symtab);
if (error) {
goto error;
}
goto error;
}
- dberror = ovsdb_datum_sort(datum, type);
+ dberror = ovsdb_datum_sort(datum, type->key.type);
if (dberror) {
ovsdb_error_destroy(dberror);
if (ovsdb_type_is_map(type)) {
ds_put_cstr(out, ", ");
}
- ovsdb_atom_to_string(&datum->keys[i], type->key_type, out);
+ ovsdb_atom_to_string(&datum->keys[i], type->key.type, out);
if (is_map) {
ds_put_char(out, '=');
- ovsdb_atom_to_string(&datum->values[i], type->value_type, out);
+ ovsdb_atom_to_string(&datum->values[i], type->value.type, out);
}
}
if (type->n_max > 1 || !datum->n) {
}
}
+/* Appends to 'out' the 'datum' (with the given 'type') in a bare string format
+ * that cannot be parsed uniformly back into a datum but is easier for shell
+ * scripts, etc., to deal with. */
+void
+ovsdb_datum_to_bare(const struct ovsdb_datum *datum,
+ const struct ovsdb_type *type, struct ds *out)
+{
+ bool is_map = ovsdb_type_is_map(type);
+ size_t i;
+
+ for (i = 0; i < datum->n; i++) {
+ if (i > 0) {
+ ds_put_cstr(out, " ");
+ }
+
+ ovsdb_atom_to_bare(&datum->keys[i], type->key.type, out);
+ if (is_map) {
+ ds_put_char(out, '=');
+ ovsdb_atom_to_bare(&datum->values[i], type->value.type, out);
+ }
+ }
+}
+
+/* Initializes 'datum' as a string-to-string map whose contents are taken from
+ * 'smap'. Destroys 'smap'. */
+void
+ovsdb_datum_from_smap(struct ovsdb_datum *datum, struct smap *smap)
+{
+ struct smap_node *node, *next;
+ size_t i;
+
+ datum->n = smap_count(smap);
+ datum->keys = xmalloc(datum->n * sizeof *datum->keys);
+ datum->values = xmalloc(datum->n * sizeof *datum->values);
+
+ i = 0;
+ SMAP_FOR_EACH_SAFE (node, next, smap) {
+ smap_steal(smap, node,
+ &datum->keys[i].string, &datum->values[i].string);
+ i++;
+ }
+ ovs_assert(i == datum->n);
+
+ smap_destroy(smap);
+ ovsdb_datum_sort_unique(datum, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING);
+}
+
static uint32_t
hash_atoms(enum ovsdb_atomic_type type, const union ovsdb_atom *atoms,
unsigned int n, uint32_t basis)
ovsdb_datum_hash(const struct ovsdb_datum *datum,
const struct ovsdb_type *type, uint32_t basis)
{
- basis = hash_atoms(type->key_type, datum->keys, datum->n, basis);
- basis ^= (type->key_type << 24) | (type->value_type << 16) | datum->n;
- basis = hash_atoms(type->value_type, datum->values, datum->n, basis);
+ basis = hash_atoms(type->key.type, datum->keys, datum->n, basis);
+ basis ^= (type->key.type << 24) | (type->value.type << 16) | datum->n;
+ basis = hash_atoms(type->value.type, datum->values, datum->n, basis);
return basis;
}
return a->n < b->n ? -1 : 1;
}
- cmp = atom_arrays_compare_3way(a->keys, b->keys, type->key_type, a->n);
+ cmp = atom_arrays_compare_3way(a->keys, b->keys, type->key.type, a->n);
if (cmp) {
return cmp;
}
- return (type->value_type == OVSDB_TYPE_VOID ? 0
- : atom_arrays_compare_3way(a->values, b->values, type->value_type,
+ return (type->value.type == OVSDB_TYPE_VOID ? 0
+ : atom_arrays_compare_3way(a->values, b->values, type->value.type,
a->n));
}
/* If 'key' is one of the keys in 'datum', returns its index within 'datum',
- * otherwise UINT_MAX. 'key_type' must be the type of the atoms stored in the
+ * otherwise UINT_MAX. 'key.type' must be the type of the atoms stored in the
* 'keys' array in 'datum'.
*/
unsigned int
}
/* If 'key' and 'value' is one of the key-value pairs in 'datum', returns its
- * index within 'datum', otherwise UINT_MAX. 'key_type' must be the type of
+ * index within 'datum', otherwise UINT_MAX. 'key.type' must be the type of
* the atoms stored in the 'keys' array in 'datum'. 'value_type' may be the
* type of the 'values' atoms or OVSDB_TYPE_VOID to compare only keys.
*/
/* If atom 'i' in 'a' is also in 'b', returns its index in 'b', otherwise
* UINT_MAX. 'type' must be the type of 'a' and 'b', except that
- * type->value_type may be set to OVSDB_TYPE_VOID to compare keys but not
+ * type->value.type may be set to OVSDB_TYPE_VOID to compare keys but not
* values. */
static unsigned int
ovsdb_datum_find(const struct ovsdb_datum *a, int i,
const struct ovsdb_type *type)
{
return ovsdb_datum_find_key_value(b,
- &a->keys[i], type->key_type,
+ &a->keys[i], type->key.type,
a->values ? &a->values[i] : NULL,
- type->value_type);
+ type->value.type);
}
/* Returns true if every element in 'a' is also in 'b', false otherwise. */
{
size_t i;
+ if (a->n > b->n) {
+ return false;
+ }
for (i = 0; i < a->n; i++) {
if (ovsdb_datum_find(a, i, b, type) == UINT_MAX) {
return false;
unsigned int capacity)
{
a->keys = xrealloc(a->keys, capacity * sizeof *a->keys);
- if (type->value_type != OVSDB_TYPE_VOID) {
+ if (type->value.type != OVSDB_TYPE_VOID) {
a->values = xrealloc(a->values, capacity * sizeof *a->values);
}
}
ovsdb_datum_remove_unsafe(struct ovsdb_datum *datum, size_t idx,
const struct ovsdb_type *type)
{
- ovsdb_atom_destroy(&datum->keys[idx], type->key_type);
+ ovsdb_atom_destroy(&datum->keys[idx], type->key.type);
datum->keys[idx] = datum->keys[datum->n - 1];
- if (type->value_type != OVSDB_TYPE_VOID) {
- ovsdb_atom_destroy(&datum->values[idx], type->value_type);
+ if (type->value.type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_destroy(&datum->values[idx], type->value.type);
datum->values[idx] = datum->values[datum->n - 1];
}
datum->n--;
{
size_t idx = datum->n++;
datum->keys = xrealloc(datum->keys, datum->n * sizeof *datum->keys);
- ovsdb_atom_clone(&datum->keys[idx], key, type->key_type);
- if (type->value_type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_clone(&datum->keys[idx], key, type->key.type);
+ if (type->value.type != OVSDB_TYPE_VOID) {
datum->values = xrealloc(datum->values,
datum->n * sizeof *datum->values);
- ovsdb_atom_clone(&datum->values[idx], value, type->value_type);
+ ovsdb_atom_clone(&datum->values[idx], value, type->value.type);
}
}
for (bi = 0; bi < b->n; bi++) {
unsigned int ai;
- ai = ovsdb_datum_find_key(a, &b->keys[bi], type->key_type);
+ ai = ovsdb_datum_find_key(a, &b->keys[bi], type->key.type);
if (ai == UINT_MAX) {
if (n == a->n) {
ovsdb_datum_reallocate(a, type, a->n + (b->n - bi));
}
- ovsdb_atom_clone(&a->keys[n], &b->keys[bi], type->key_type);
- if (type->value_type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_clone(&a->keys[n], &b->keys[bi], type->key.type);
+ if (type->value.type != OVSDB_TYPE_VOID) {
ovsdb_atom_clone(&a->values[n], &b->values[bi],
- type->value_type);
+ type->value.type);
}
n++;
- } else if (replace && type->value_type != OVSDB_TYPE_VOID) {
- ovsdb_atom_destroy(&a->values[ai], type->value_type);
+ } else if (replace && type->value.type != OVSDB_TYPE_VOID) {
+ ovsdb_atom_destroy(&a->values[ai], type->value.type);
ovsdb_atom_clone(&a->values[ai], &b->values[bi],
- type->value_type);
+ type->value.type);
}
}
if (n != a->n) {
struct ovsdb_error *error;
a->n = n;
- error = ovsdb_datum_sort(a, type);
- assert(!error);
+ error = ovsdb_datum_sort(a, type->key.type);
+ ovs_assert(!error);
}
}
bool changed = false;
size_t i;
- assert(a_type->key_type == b_type->key_type);
- assert(a_type->value_type == b_type->value_type
- || b_type->value_type == OVSDB_TYPE_VOID);
+ ovs_assert(a_type->key.type == b_type->key.type);
+ ovs_assert(a_type->value.type == b_type->value.type
+ || b_type->value.type == OVSDB_TYPE_VOID);
/* XXX The big-O of this could easily be improved. */
for (i = 0; i < a->n; ) {
}
}
if (changed) {
- struct ovsdb_error *error = ovsdb_datum_sort(a, a_type);
- assert(!error);
+ ovsdb_datum_sort_assert(a, a_type->key.type);
}
}
\f
-struct ovsdb_symbol_table {
- struct shash sh;
-};
-
struct ovsdb_symbol_table *
ovsdb_symbol_table_create(void)
{
ovsdb_symbol_table_destroy(struct ovsdb_symbol_table *symtab)
{
if (symtab) {
- struct shash_node *node, *next;
-
- SHASH_FOR_EACH_SAFE (node, next, &symtab->sh) {
- struct ovsdb_symbol *symbol = node->data;
- free(symbol);
- shash_delete(&symtab->sh, node);
- }
- shash_destroy(&symtab->sh);
+ shash_destroy_free_data(&symtab->sh);
free(symtab);
}
}
return shash_find_data(&symtab->sh, name);
}
-void
+struct ovsdb_symbol *
ovsdb_symbol_table_put(struct ovsdb_symbol_table *symtab, const char *name,
- const struct uuid *uuid, bool used)
+ const struct uuid *uuid, bool created)
{
struct ovsdb_symbol *symbol;
- assert(!ovsdb_symbol_table_get(symtab, name));
+ ovs_assert(!ovsdb_symbol_table_get(symtab, name));
symbol = xmalloc(sizeof *symbol);
symbol->uuid = *uuid;
- symbol->used = used;
+ symbol->created = created;
+ symbol->strong_ref = false;
+ symbol->weak_ref = false;
shash_add(&symtab->sh, name, symbol);
+ return symbol;
+}
+
+struct ovsdb_symbol *
+ovsdb_symbol_table_insert(struct ovsdb_symbol_table *symtab,
+ const char *name)
+{
+ struct ovsdb_symbol *symbol;
+
+ symbol = ovsdb_symbol_table_get(symtab, name);
+ if (!symbol) {
+ struct uuid uuid;
+
+ uuid_generate(&uuid);
+ symbol = ovsdb_symbol_table_put(symtab, name, &uuid, false);
+ }
+ return symbol;
+}
+\f
+/* APIs for Generating and apply diffs. */
+
+/* Generate a difference ovsdb_dataum between 'old' and 'new'.
+ * 'new' can be regenerated by applying the difference to the 'old'.
+ *
+ * The diff operation is reversible. Given 'old',
+ * 'new' can be recreated by applying diff to 'old'.
+ *
+ * Thus
+ * Let d = 'old' diff 'new'
+ * then 'new' = 'old' diff d
+ *
+ * The 'diff' datum is always safe; the orders of keys are maintained
+ * since they are added in order. */
+void
+ovsdb_datum_diff(struct ovsdb_datum *diff,
+ const struct ovsdb_datum *old,
+ const struct ovsdb_datum *new,
+ const struct ovsdb_type *type)
+{
+ size_t oi, ni;
+
+ ovsdb_datum_init_empty(diff);
+ if (!ovsdb_type_is_composite(type)) {
+ ovsdb_datum_clone(diff, new, type);
+ return;
+ }
+
+ /* Generate the diff in O(n) time. */
+ for (oi = ni = 0; oi < old->n && ni < new->n; ) {
+ int c = ovsdb_atom_compare_3way(&old->keys[oi], &new->keys[ni],
+ type->key.type);
+ if (c < 0) {
+ ovsdb_datum_add_unsafe(diff, &old->keys[oi], &old->values[oi],
+ type);
+ oi++;
+ } else if (c > 0) {
+ ovsdb_datum_add_unsafe(diff, &new->keys[ni], &new->values[ni],
+ type);
+ ni++;
+ } else {
+ if (type->value.type != OVSDB_TYPE_VOID &&
+ ovsdb_atom_compare_3way(&old->values[oi], &new->values[ni],
+ type->value.type)) {
+ ovsdb_datum_add_unsafe(diff, &new->keys[ni], &new->values[ni],
+ type);
+ }
+ oi++; ni++;
+ }
+ }
+
+ for (; oi < old->n; oi++) {
+ ovsdb_datum_add_unsafe(diff, &old->keys[oi], &old->values[oi], type);
+ }
+
+ for (; ni < new->n; ni++) {
+ ovsdb_datum_add_unsafe(diff, &new->keys[ni], &new->values[ni], type);
+ }
}
+
+/* Apply 'diff' to 'old' to regenerate 'new'.
+ *
+ * Return NULL if the 'new' is successfully generated, otherwise, return
+ * ovsdb_error and the stat of 'new' is indeterministic. */
+struct ovsdb_error *
+ovsdb_datum_apply_diff(struct ovsdb_datum *new,
+ const struct ovsdb_datum *old,
+ const struct ovsdb_datum *diff,
+ const struct ovsdb_type *type)
+{
+ ovsdb_datum_init_empty(new);
+ ovsdb_datum_diff(new, old, diff, type);
+
+ /* Make sure member size of 'new' conforms to type. */
+ if (new->n < type->n_min || new->n > type->n_max) {
+ ovsdb_datum_destroy(new, type);
+ return ovsdb_error(NULL, "Datum crated by diff has size error");
+ }
+
+ return NULL;
+}
+
\f
/* Extracts a token from the beginning of 's' and returns a pointer just after
* the token. Stores the token itself into '*outp', which the caller is
bool
ovsdb_token_is_delim(unsigned char c)
{
- return strchr(":=, []{}", c) != NULL;
+ return strchr(":=, []{}!<>", c) != NULL;
}
projects / cascardo / ovs.git / blobdiff