1 /* Copyright (c) 2009, 2010 Nicira Networks
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 #include "ovsdb-data.h"
26 #include "dynamic-string.h"
28 #include "ovsdb-error.h"
35 wrap_json(const char *name, struct json *wrapped)
37 return json_array_create_2(json_string_create(name), wrapped);
40 /* Initializes 'atom' with the default value of the given 'type'.
42 * The default value for an atom is as defined in ovsdb/SPECS:
44 * - "integer" or "real": 0
48 * - "string": "" (the empty string)
50 * - "uuid": 00000000-0000-0000-0000-000000000000
52 * The caller must eventually arrange for 'atom' to be destroyed (with
53 * ovsdb_atom_destroy()). */
55 ovsdb_atom_init_default(union ovsdb_atom *atom, enum ovsdb_atomic_type type)
61 case OVSDB_TYPE_INTEGER:
69 case OVSDB_TYPE_BOOLEAN:
70 atom->boolean = false;
73 case OVSDB_TYPE_STRING:
74 atom->string = xmemdup("", 1);
78 uuid_zero(&atom->uuid);
87 /* Returns a read-only atom of the given 'type' that has the default value for
88 * 'type'. The caller must not modify or free the returned atom.
90 * See ovsdb_atom_init_default() for an explanation of the default value of an
92 const union ovsdb_atom *
93 ovsdb_atom_default(enum ovsdb_atomic_type type)
95 static union ovsdb_atom default_atoms[OVSDB_N_TYPES];
101 for (i = 0; i < OVSDB_N_TYPES; i++) {
102 if (i != OVSDB_TYPE_VOID) {
103 ovsdb_atom_init_default(&default_atoms[i], i);
109 assert(ovsdb_atomic_type_is_valid(type));
110 return &default_atoms[type];
113 /* Returns true if 'atom', which must have the given 'type', has the default
114 * value for that type.
116 * See ovsdb_atom_init_default() for an explanation of the default value of an
119 ovsdb_atom_is_default(const union ovsdb_atom *atom,
120 enum ovsdb_atomic_type type)
123 case OVSDB_TYPE_VOID:
126 case OVSDB_TYPE_INTEGER:
127 return atom->integer == 0;
129 case OVSDB_TYPE_REAL:
130 return atom->real == 0.0;
132 case OVSDB_TYPE_BOOLEAN:
133 return atom->boolean == false;
135 case OVSDB_TYPE_STRING:
136 return atom->string[0] == '\0';
138 case OVSDB_TYPE_UUID:
139 return uuid_is_zero(&atom->uuid);
147 /* Initializes 'new' as a copy of 'old', with the given 'type'.
149 * The caller must eventually arrange for 'new' to be destroyed (with
150 * ovsdb_atom_destroy()). */
152 ovsdb_atom_clone(union ovsdb_atom *new, const union ovsdb_atom *old,
153 enum ovsdb_atomic_type type)
156 case OVSDB_TYPE_VOID:
159 case OVSDB_TYPE_INTEGER:
160 new->integer = old->integer;
163 case OVSDB_TYPE_REAL:
164 new->real = old->real;
167 case OVSDB_TYPE_BOOLEAN:
168 new->boolean = old->boolean;
171 case OVSDB_TYPE_STRING:
172 new->string = xstrdup(old->string);
175 case OVSDB_TYPE_UUID:
176 new->uuid = old->uuid;
185 /* Swaps the contents of 'a' and 'b', which need not have the same type. */
187 ovsdb_atom_swap(union ovsdb_atom *a, union ovsdb_atom *b)
189 union ovsdb_atom tmp = *a;
194 /* Returns a hash value for 'atom', which has the specified 'type', folding
195 * 'basis' into the calculation. */
197 ovsdb_atom_hash(const union ovsdb_atom *atom, enum ovsdb_atomic_type type,
201 case OVSDB_TYPE_VOID:
204 case OVSDB_TYPE_INTEGER:
205 return hash_int(atom->integer, basis);
207 case OVSDB_TYPE_REAL:
208 return hash_double(atom->real, basis);
210 case OVSDB_TYPE_BOOLEAN:
211 return hash_boolean(atom->boolean, basis);
213 case OVSDB_TYPE_STRING:
214 return hash_string(atom->string, basis);
216 case OVSDB_TYPE_UUID:
217 return hash_int(uuid_hash(&atom->uuid), basis);
225 /* Compares 'a' and 'b', which both have type 'type', and returns a
226 * strcmp()-like result. */
228 ovsdb_atom_compare_3way(const union ovsdb_atom *a,
229 const union ovsdb_atom *b,
230 enum ovsdb_atomic_type type)
233 case OVSDB_TYPE_VOID:
236 case OVSDB_TYPE_INTEGER:
237 return a->integer < b->integer ? -1 : a->integer > b->integer;
239 case OVSDB_TYPE_REAL:
240 return a->real < b->real ? -1 : a->real > b->real;
242 case OVSDB_TYPE_BOOLEAN:
243 return a->boolean - b->boolean;
245 case OVSDB_TYPE_STRING:
246 return strcmp(a->string, b->string);
248 case OVSDB_TYPE_UUID:
249 return uuid_compare_3way(&a->uuid, &b->uuid);
257 static struct ovsdb_error *
258 unwrap_json(const struct json *json, const char *name,
259 enum json_type value_type, const struct json **value)
261 if (json->type != JSON_ARRAY
262 || json->u.array.n != 2
263 || json->u.array.elems[0]->type != JSON_STRING
264 || (name && strcmp(json->u.array.elems[0]->u.string, name))
265 || json->u.array.elems[1]->type != value_type)
267 return ovsdb_syntax_error(json, NULL, "expected [\"%s\", <%s>]", name,
268 json_type_to_string(value_type));
270 *value = json->u.array.elems[1];
274 static struct ovsdb_error *
275 parse_json_pair(const struct json *json,
276 const struct json **elem0, const struct json **elem1)
278 if (json->type != JSON_ARRAY || json->u.array.n != 2) {
279 return ovsdb_syntax_error(json, NULL, "expected 2-element array");
281 *elem0 = json->u.array.elems[0];
282 *elem1 = json->u.array.elems[1];
286 static struct ovsdb_error * WARN_UNUSED_RESULT
287 ovsdb_atom_parse_uuid(struct uuid *uuid, const struct json *json,
288 struct ovsdb_symbol_table *symtab)
290 struct ovsdb_error *error0;
291 const struct json *value;
293 error0 = unwrap_json(json, "uuid", JSON_STRING, &value);
295 const char *uuid_string = json_string(value);
296 if (!uuid_from_string(uuid, uuid_string)) {
297 return ovsdb_syntax_error(json, NULL, "\"%s\" is not a valid UUID",
301 struct ovsdb_error *error1;
303 error1 = unwrap_json(json, "named-uuid", JSON_STRING, &value);
305 const char *name = json_string(value);
307 ovsdb_error_destroy(error0);
308 *uuid = ovsdb_symbol_table_insert(symtab, name)->uuid;
311 ovsdb_error_destroy(error1);
317 static struct ovsdb_error * WARN_UNUSED_RESULT
318 ovsdb_atom_from_json__(union ovsdb_atom *atom, enum ovsdb_atomic_type type,
319 const struct json *json,
320 struct ovsdb_symbol_table *symtab)
323 case OVSDB_TYPE_VOID:
326 case OVSDB_TYPE_INTEGER:
327 if (json->type == JSON_INTEGER) {
328 atom->integer = json->u.integer;
333 case OVSDB_TYPE_REAL:
334 if (json->type == JSON_INTEGER) {
335 atom->real = json->u.integer;
337 } else if (json->type == JSON_REAL) {
338 atom->real = json->u.real;
343 case OVSDB_TYPE_BOOLEAN:
344 if (json->type == JSON_TRUE) {
345 atom->boolean = true;
347 } else if (json->type == JSON_FALSE) {
348 atom->boolean = false;
353 case OVSDB_TYPE_STRING:
354 if (json->type == JSON_STRING) {
355 atom->string = xstrdup(json->u.string);
360 case OVSDB_TYPE_UUID:
361 return ovsdb_atom_parse_uuid(&atom->uuid, json, symtab);
368 return ovsdb_syntax_error(json, NULL, "expected %s",
369 ovsdb_atomic_type_to_string(type));
372 /* Parses 'json' as an atom of the type described by 'base'. If successful,
373 * returns NULL and initializes 'atom' with the parsed atom. On failure,
374 * returns an error and the contents of 'atom' are indeterminate. The caller
375 * is responsible for freeing the error or the atom that is returned.
377 * Violations of constraints expressed by 'base' are treated as errors.
379 * If 'symtab' is nonnull, then named UUIDs in 'symtab' are accepted. Refer to
380 * ovsdb/SPECS for information about this, and for the syntax that this
381 * function accepts. */
383 ovsdb_atom_from_json(union ovsdb_atom *atom,
384 const struct ovsdb_base_type *base,
385 const struct json *json,
386 struct ovsdb_symbol_table *symtab)
388 struct ovsdb_error *error;
390 error = ovsdb_atom_from_json__(atom, base->type, json, symtab);
395 error = ovsdb_atom_check_constraints(atom, base);
397 ovsdb_atom_destroy(atom, base->type);
402 /* Converts 'atom', of the specified 'type', to JSON format, and returns the
403 * JSON. The caller is responsible for freeing the returned JSON.
405 * Refer to ovsdb/SPECS for the format of the JSON that this function
408 ovsdb_atom_to_json(const union ovsdb_atom *atom, enum ovsdb_atomic_type type)
411 case OVSDB_TYPE_VOID:
414 case OVSDB_TYPE_INTEGER:
415 return json_integer_create(atom->integer);
417 case OVSDB_TYPE_REAL:
418 return json_real_create(atom->real);
420 case OVSDB_TYPE_BOOLEAN:
421 return json_boolean_create(atom->boolean);
423 case OVSDB_TYPE_STRING:
424 return json_string_create(atom->string);
426 case OVSDB_TYPE_UUID:
427 return wrap_json("uuid", json_string_create_nocopy(
428 xasprintf(UUID_FMT, UUID_ARGS(&atom->uuid))));
437 ovsdb_atom_from_string__(union ovsdb_atom *atom, enum ovsdb_atomic_type type,
438 const char *s, struct ovsdb_symbol_table *symtab)
441 case OVSDB_TYPE_VOID:
444 case OVSDB_TYPE_INTEGER: {
445 long long int integer;
446 if (!str_to_llong(s, 10, &integer)) {
447 return xasprintf("\"%s\" is not a valid integer", s);
449 atom->integer = integer;
453 case OVSDB_TYPE_REAL:
454 if (!str_to_double(s, &atom->real)) {
455 return xasprintf("\"%s\" is not a valid real number", s);
457 /* Our JSON input routines map negative zero to zero, so do that here
458 * too for consistency. */
459 if (atom->real == 0.0) {
464 case OVSDB_TYPE_BOOLEAN:
465 if (!strcmp(s, "true") || !strcmp(s, "yes") || !strcmp(s, "on")
466 || !strcmp(s, "1")) {
467 atom->boolean = true;
468 } else if (!strcmp(s, "false") || !strcmp(s, "no") || !strcmp(s, "off")
469 || !strcmp(s, "0")) {
470 atom->boolean = false;
472 return xasprintf("\"%s\" is not a valid boolean "
473 "(use \"true\" or \"false\")", s);
477 case OVSDB_TYPE_STRING:
479 return xstrdup("An empty string is not valid as input; "
480 "use \"\" to represent the empty string");
481 } else if (*s == '"') {
482 size_t s_len = strlen(s);
484 if (s_len < 2 || s[s_len - 1] != '"') {
485 return xasprintf("%s: missing quote at end of "
487 } else if (!json_string_unescape(s + 1, s_len - 2,
489 char *error = xasprintf("%s: %s", s, atom->string);
494 atom->string = xstrdup(s);
498 case OVSDB_TYPE_UUID:
500 atom->uuid = ovsdb_symbol_table_insert(symtab, s)->uuid;
501 } else if (!uuid_from_string(&atom->uuid, s)) {
502 return xasprintf("\"%s\" is not a valid UUID", s);
514 /* Initializes 'atom' to a value of type 'base' parsed from 's', which takes
515 * one of the following forms:
517 * - OVSDB_TYPE_INTEGER: A decimal integer optionally preceded by a sign.
519 * - OVSDB_TYPE_REAL: A floating-point number in the format accepted by
522 * - OVSDB_TYPE_BOOLEAN: "true", "yes", "on", "1" for true, or "false",
523 * "no", "off", or "0" for false.
525 * - OVSDB_TYPE_STRING: A JSON string if it begins with a quote, otherwise
526 * an arbitrary string.
528 * - OVSDB_TYPE_UUID: A UUID in RFC 4122 format. If 'symtab' is nonnull,
529 * then an identifier beginning with '@' is also acceptable. If the
530 * named identifier is already in 'symtab', then the associated UUID is
531 * used; otherwise, a new, random UUID is used and added to the symbol
534 * Returns a null pointer if successful, otherwise an error message describing
535 * the problem. On failure, the contents of 'atom' are indeterminate. The
536 * caller is responsible for freeing the atom or the error.
539 ovsdb_atom_from_string(union ovsdb_atom *atom,
540 const struct ovsdb_base_type *base, const char *s,
541 struct ovsdb_symbol_table *symtab)
543 struct ovsdb_error *error;
546 msg = ovsdb_atom_from_string__(atom, base->type, s, symtab);
551 error = ovsdb_atom_check_constraints(atom, base);
553 msg = ovsdb_error_to_string(error);
554 ovsdb_error_destroy(error);
560 string_needs_quotes(const char *s)
566 if (!isalpha(c) && c != '_') {
570 while ((c = *p++) != '\0') {
571 if (!isalpha(c) && c != '_' && c != '-' && c != '.') {
576 if (!strcmp(s, "true") || !strcmp(s, "false")) {
583 /* Appends 'atom' (which has the given 'type') to 'out', in a format acceptable
584 * to ovsdb_atom_from_string(). */
586 ovsdb_atom_to_string(const union ovsdb_atom *atom, enum ovsdb_atomic_type type,
590 case OVSDB_TYPE_VOID:
593 case OVSDB_TYPE_INTEGER:
594 ds_put_format(out, "%"PRId64, atom->integer);
597 case OVSDB_TYPE_REAL:
598 ds_put_format(out, "%.*g", DBL_DIG, atom->real);
601 case OVSDB_TYPE_BOOLEAN:
602 ds_put_cstr(out, atom->boolean ? "true" : "false");
605 case OVSDB_TYPE_STRING:
606 if (string_needs_quotes(atom->string)) {
609 json.type = JSON_STRING;
610 json.u.string = atom->string;
611 json_to_ds(&json, 0, out);
613 ds_put_cstr(out, atom->string);
617 case OVSDB_TYPE_UUID:
618 ds_put_format(out, UUID_FMT, UUID_ARGS(&atom->uuid));
627 static struct ovsdb_error *
628 check_string_constraints(const char *s,
629 const struct ovsdb_string_constraints *c)
634 msg = utf8_validate(s, &n_chars);
636 struct ovsdb_error *error;
638 error = ovsdb_error("constraint violation",
639 "\"%s\" is not a valid UTF-8 string: %s",
645 if (n_chars < c->minLen) {
647 "constraint violation",
648 "\"%s\" length %zu is less than minimum allowed "
649 "length %u", s, n_chars, c->minLen);
650 } else if (n_chars > c->maxLen) {
652 "constraint violation",
653 "\"%s\" length %zu is greater than maximum allowed "
654 "length %u", s, n_chars, c->maxLen);
660 /* Checks whether 'atom' meets the constraints (if any) defined in 'base'.
661 * (base->type must specify 'atom''s type.) Returns a null pointer if the
662 * constraints are met, otherwise an error that explains the violation.
664 * Checking UUID constraints is deferred to transaction commit time, so this
665 * function does nothing for UUID constraints. */
667 ovsdb_atom_check_constraints(const union ovsdb_atom *atom,
668 const struct ovsdb_base_type *base)
671 && ovsdb_datum_find_key(base->enum_, atom, base->type) == UINT_MAX) {
672 struct ovsdb_error *error;
673 struct ds actual = DS_EMPTY_INITIALIZER;
674 struct ds valid = DS_EMPTY_INITIALIZER;
676 ovsdb_atom_to_string(atom, base->type, &actual);
677 ovsdb_datum_to_string(base->enum_,
678 ovsdb_base_type_get_enum_type(base->type),
680 error = ovsdb_error("constraint violation",
681 "%s is not one of the allowed values (%s)",
682 ds_cstr(&actual), ds_cstr(&valid));
689 switch (base->type) {
690 case OVSDB_TYPE_VOID:
693 case OVSDB_TYPE_INTEGER:
694 if (atom->integer >= base->u.integer.min
695 && atom->integer <= base->u.integer.max) {
697 } else if (base->u.integer.min != INT64_MIN) {
698 if (base->u.integer.max != INT64_MAX) {
699 return ovsdb_error("constraint violation",
700 "%"PRId64" is not in the valid range "
701 "%"PRId64" to %"PRId64" (inclusive)",
703 base->u.integer.min, base->u.integer.max);
705 return ovsdb_error("constraint violation",
706 "%"PRId64" is less than minimum allowed "
708 atom->integer, base->u.integer.min);
711 return ovsdb_error("constraint violation",
712 "%"PRId64" is greater than maximum allowed "
714 atom->integer, base->u.integer.max);
718 case OVSDB_TYPE_REAL:
719 if (atom->real >= base->u.real.min && atom->real <= base->u.real.max) {
721 } else if (base->u.real.min != -DBL_MAX) {
722 if (base->u.real.max != DBL_MAX) {
723 return ovsdb_error("constraint violation",
724 "%.*g is not in the valid range "
725 "%.*g to %.*g (inclusive)",
727 DBL_DIG, base->u.real.min,
728 DBL_DIG, base->u.real.max);
730 return ovsdb_error("constraint violation",
731 "%.*g is less than minimum allowed "
734 DBL_DIG, base->u.real.min);
737 return ovsdb_error("constraint violation",
738 "%.*g is greater than maximum allowed "
741 DBL_DIG, base->u.real.max);
745 case OVSDB_TYPE_BOOLEAN:
748 case OVSDB_TYPE_STRING:
749 return check_string_constraints(atom->string, &base->u.string);
751 case OVSDB_TYPE_UUID:
760 static union ovsdb_atom *
761 alloc_default_atoms(enum ovsdb_atomic_type type, size_t n)
763 if (type != OVSDB_TYPE_VOID && n) {
764 union ovsdb_atom *atoms;
767 atoms = xmalloc(n * sizeof *atoms);
768 for (i = 0; i < n; i++) {
769 ovsdb_atom_init_default(&atoms[i], type);
773 /* Avoid wasting memory in the n == 0 case, because xmalloc(0) is
774 * treated as xmalloc(1). */
779 /* Initializes 'datum' as an empty datum. (An empty datum can be treated as
782 ovsdb_datum_init_empty(struct ovsdb_datum *datum)
786 datum->values = NULL;
789 /* Initializes 'datum' as a datum that has the default value for 'type'.
791 * The default value for a particular type is as defined in ovsdb/SPECS:
793 * - If n_min is 0, then the default value is the empty set (or map).
795 * - If n_min is 1, the default value is a single value or a single
796 * key-value pair, whose key and value are the defaults for their
797 * atomic types. (See ovsdb_atom_init_default() for details.)
799 * - n_min > 1 is invalid. See ovsdb_type_is_valid().
802 ovsdb_datum_init_default(struct ovsdb_datum *datum,
803 const struct ovsdb_type *type)
805 datum->n = type->n_min;
806 datum->keys = alloc_default_atoms(type->key.type, datum->n);
807 datum->values = alloc_default_atoms(type->value.type, datum->n);
810 /* Returns a read-only datum of the given 'type' that has the default value for
811 * 'type'. The caller must not modify or free the returned datum.
813 * See ovsdb_datum_init_default() for an explanation of the default value of a
815 const struct ovsdb_datum *
816 ovsdb_datum_default(const struct ovsdb_type *type)
818 if (type->n_min == 0) {
819 static const struct ovsdb_datum empty;
821 } else if (type->n_min == 1) {
822 static struct ovsdb_datum default_data[OVSDB_N_TYPES][OVSDB_N_TYPES];
823 struct ovsdb_datum *d;
824 int kt = type->key.type;
825 int vt = type->value.type;
827 assert(ovsdb_type_is_valid(type));
829 d = &default_data[kt][vt];
832 d->keys = (union ovsdb_atom *) ovsdb_atom_default(kt);
833 if (vt != OVSDB_TYPE_VOID) {
834 d->values = (union ovsdb_atom *) ovsdb_atom_default(vt);
843 /* Returns true if 'datum', which must have the given 'type', has the default
844 * value for that type.
846 * See ovsdb_datum_init_default() for an explanation of the default value of a
849 ovsdb_datum_is_default(const struct ovsdb_datum *datum,
850 const struct ovsdb_type *type)
854 if (datum->n != type->n_min) {
857 for (i = 0; i < datum->n; i++) {
858 if (!ovsdb_atom_is_default(&datum->keys[i], type->key.type)) {
861 if (type->value.type != OVSDB_TYPE_VOID
862 && !ovsdb_atom_is_default(&datum->values[i], type->value.type)) {
870 static union ovsdb_atom *
871 clone_atoms(const union ovsdb_atom *old, enum ovsdb_atomic_type type, size_t n)
873 if (type != OVSDB_TYPE_VOID && n) {
874 union ovsdb_atom *new;
877 new = xmalloc(n * sizeof *new);
878 for (i = 0; i < n; i++) {
879 ovsdb_atom_clone(&new[i], &old[i], type);
883 /* Avoid wasting memory in the n == 0 case, because xmalloc(0) is
884 * treated as xmalloc(1). */
889 /* Initializes 'new' as a copy of 'old', with the given 'type'.
891 * The caller must eventually arrange for 'new' to be destroyed (with
892 * ovsdb_datum_destroy()). */
894 ovsdb_datum_clone(struct ovsdb_datum *new, const struct ovsdb_datum *old,
895 const struct ovsdb_type *type)
897 unsigned int n = old->n;
899 new->keys = clone_atoms(old->keys, type->key.type, n);
900 new->values = clone_atoms(old->values, type->value.type, n);
904 free_data(enum ovsdb_atomic_type type,
905 union ovsdb_atom *atoms, size_t n_atoms)
907 if (ovsdb_atom_needs_destruction(type)) {
909 for (i = 0; i < n_atoms; i++) {
910 ovsdb_atom_destroy(&atoms[i], type);
916 /* Frees the data owned by 'datum', which must have the given 'type'.
918 * This does not actually call free(datum). If necessary, the caller must be
919 * responsible for that. */
921 ovsdb_datum_destroy(struct ovsdb_datum *datum, const struct ovsdb_type *type)
923 free_data(type->key.type, datum->keys, datum->n);
924 free_data(type->value.type, datum->values, datum->n);
927 /* Swaps the contents of 'a' and 'b', which need not have the same type. */
929 ovsdb_datum_swap(struct ovsdb_datum *a, struct ovsdb_datum *b)
931 struct ovsdb_datum tmp = *a;
936 struct ovsdb_datum_sort_cbdata {
937 enum ovsdb_atomic_type key_type;
938 enum ovsdb_atomic_type value_type;
939 struct ovsdb_datum *datum;
943 ovsdb_datum_sort_compare_cb(size_t a, size_t b, void *cbdata_)
945 struct ovsdb_datum_sort_cbdata *cbdata = cbdata_;
948 retval = ovsdb_atom_compare_3way(&cbdata->datum->keys[a],
949 &cbdata->datum->keys[b],
951 if (retval || cbdata->value_type == OVSDB_TYPE_VOID) {
955 return ovsdb_atom_compare_3way(&cbdata->datum->values[a],
956 &cbdata->datum->values[b],
961 ovsdb_datum_sort_swap_cb(size_t a, size_t b, void *cbdata_)
963 struct ovsdb_datum_sort_cbdata *cbdata = cbdata_;
965 ovsdb_atom_swap(&cbdata->datum->keys[a], &cbdata->datum->keys[b]);
966 if (cbdata->datum->values) {
967 ovsdb_atom_swap(&cbdata->datum->values[a], &cbdata->datum->values[b]);
972 ovsdb_datum_sort__(struct ovsdb_datum *datum, enum ovsdb_atomic_type key_type,
973 enum ovsdb_atomic_type value_type)
975 struct ovsdb_datum_sort_cbdata cbdata;
977 cbdata.key_type = key_type;
978 cbdata.value_type = value_type;
979 cbdata.datum = datum;
980 sort(datum->n, ovsdb_datum_sort_compare_cb, ovsdb_datum_sort_swap_cb,
984 /* The keys in an ovsdb_datum must be unique and in sorted order. Most
985 * functions that modify an ovsdb_datum maintain these invariants. For those
986 * that don't, this function checks and restores these invariants for 'datum',
987 * whose keys are of type 'key_type'.
989 * This function returns NULL if successful, otherwise an error message. The
990 * caller must free the returned error when it is no longer needed. On error,
991 * 'datum' is sorted but not unique. */
993 ovsdb_datum_sort(struct ovsdb_datum *datum, enum ovsdb_atomic_type key_type)
1001 ovsdb_datum_sort__(datum, key_type, OVSDB_TYPE_VOID);
1003 for (i = 0; i < datum->n - 1; i++) {
1004 if (ovsdb_atom_equals(&datum->keys[i], &datum->keys[i + 1],
1006 if (datum->values) {
1007 return ovsdb_error(NULL, "map contains duplicate key");
1009 return ovsdb_error(NULL, "set contains duplicate");
1016 /* This function is the same as ovsdb_datum_sort(), except that the caller
1017 * knows that 'datum' is unique. The operation therefore "cannot fail", so
1018 * this function assert-fails if it actually does. */
1020 ovsdb_datum_sort_assert(struct ovsdb_datum *datum,
1021 enum ovsdb_atomic_type key_type)
1023 struct ovsdb_error *error = ovsdb_datum_sort(datum, key_type);
1029 /* This is similar to ovsdb_datum_sort(), except that it drops duplicate keys
1030 * instead of reporting an error. In a map type, the smallest value among a
1031 * group of duplicate pairs is retained and the others are dropped.
1033 * Returns the number of keys (or pairs) that were dropped. */
1035 ovsdb_datum_sort_unique(struct ovsdb_datum *datum,
1036 enum ovsdb_atomic_type key_type,
1037 enum ovsdb_atomic_type value_type)
1045 ovsdb_datum_sort__(datum, key_type, value_type);
1048 for (src = 1; src < datum->n; src++) {
1049 if (ovsdb_atom_equals(&datum->keys[src], &datum->keys[dst - 1],
1051 ovsdb_atom_destroy(&datum->keys[src], key_type);
1052 if (value_type != OVSDB_TYPE_VOID) {
1053 ovsdb_atom_destroy(&datum->values[src], value_type);
1057 datum->keys[dst] = datum->keys[src];
1058 if (value_type != OVSDB_TYPE_VOID) {
1059 datum->values[dst] = datum->values[src];
1066 return datum->n - src;
1069 /* Checks that each of the atoms in 'datum' conforms to the constraints
1070 * specified by its 'type'. Returns an error if a constraint is violated,
1071 * otherwise a null pointer.
1073 * This function is not commonly useful because the most ordinary way to obtain
1074 * a datum is ultimately via ovsdb_atom_from_string() or
1075 * ovsdb_atom_from_json(), which check constraints themselves. */
1076 struct ovsdb_error *
1077 ovsdb_datum_check_constraints(const struct ovsdb_datum *datum,
1078 const struct ovsdb_type *type)
1080 struct ovsdb_error *error;
1083 for (i = 0; i < datum->n; i++) {
1084 error = ovsdb_atom_check_constraints(&datum->keys[i], &type->key);
1090 if (type->value.type != OVSDB_TYPE_VOID) {
1091 for (i = 0; i < datum->n; i++) {
1092 error = ovsdb_atom_check_constraints(&datum->values[i],
1103 static struct ovsdb_error *
1104 ovsdb_datum_from_json__(struct ovsdb_datum *datum,
1105 const struct ovsdb_type *type,
1106 const struct json *json,
1107 struct ovsdb_symbol_table *symtab)
1109 struct ovsdb_error *error;
1111 if (ovsdb_type_is_map(type)
1112 || (json->type == JSON_ARRAY
1113 && json->u.array.n > 0
1114 && json->u.array.elems[0]->type == JSON_STRING
1115 && !strcmp(json->u.array.elems[0]->u.string, "set"))) {
1116 bool is_map = ovsdb_type_is_map(type);
1117 const char *class = is_map ? "map" : "set";
1118 const struct json *inner;
1122 error = unwrap_json(json, class, JSON_ARRAY, &inner);
1127 n = inner->u.array.n;
1128 if (n < type->n_min || n > type->n_max) {
1129 return ovsdb_syntax_error(json, NULL, "%s must have %u to "
1130 "%u members but %zu are present",
1131 class, type->n_min, type->n_max, n);
1135 datum->keys = xmalloc(n * sizeof *datum->keys);
1136 datum->values = is_map ? xmalloc(n * sizeof *datum->values) : NULL;
1137 for (i = 0; i < n; i++) {
1138 const struct json *element = inner->u.array.elems[i];
1139 const struct json *key = NULL;
1140 const struct json *value = NULL;
1145 error = parse_json_pair(element, &key, &value);
1151 error = ovsdb_atom_from_json(&datum->keys[i], &type->key,
1158 error = ovsdb_atom_from_json(&datum->values[i],
1159 &type->value, value, symtab);
1161 ovsdb_atom_destroy(&datum->keys[i], type->key.type);
1171 ovsdb_datum_destroy(datum, type);
1175 datum->keys = xmalloc(sizeof *datum->keys);
1176 datum->values = NULL;
1178 error = ovsdb_atom_from_json(&datum->keys[0], &type->key,
1187 /* Parses 'json' as a datum of the type described by 'type'. If successful,
1188 * returns NULL and initializes 'datum' with the parsed datum. On failure,
1189 * returns an error and the contents of 'datum' are indeterminate. The caller
1190 * is responsible for freeing the error or the datum that is returned.
1192 * Violations of constraints expressed by 'type' are treated as errors.
1194 * If 'symtab' is nonnull, then named UUIDs in 'symtab' are accepted. Refer to
1195 * ovsdb/SPECS for information about this, and for the syntax that this
1196 * function accepts. */
1197 struct ovsdb_error *
1198 ovsdb_datum_from_json(struct ovsdb_datum *datum,
1199 const struct ovsdb_type *type,
1200 const struct json *json,
1201 struct ovsdb_symbol_table *symtab)
1203 struct ovsdb_error *error;
1205 error = ovsdb_datum_from_json__(datum, type, json, symtab);
1210 error = ovsdb_datum_sort(datum, type->key.type);
1212 ovsdb_datum_destroy(datum, type);
1217 /* This is the same as ovsdb_datum_from_json(), except that duplicate values
1218 * in a set or map are dropped instead of being treated as an error. */
1219 struct ovsdb_error *
1220 ovsdb_datum_from_json_unique(struct ovsdb_datum *datum,
1221 const struct ovsdb_type *type,
1222 const struct json *json,
1223 struct ovsdb_symbol_table *symtab)
1225 struct ovsdb_error *error;
1227 error = ovsdb_datum_from_json__(datum, type, json, symtab);
1229 ovsdb_datum_sort_unique(datum, type->key.type, type->value.type);
1234 /* Converts 'datum', of the specified 'type', to JSON format, and returns the
1235 * JSON. The caller is responsible for freeing the returned JSON.
1237 * 'type' constraints on datum->n are ignored.
1239 * Refer to ovsdb/SPECS for the format of the JSON that this function
1242 ovsdb_datum_to_json(const struct ovsdb_datum *datum,
1243 const struct ovsdb_type *type)
1245 if (datum->n == 1 && !ovsdb_type_is_map(type)) {
1246 return ovsdb_atom_to_json(&datum->keys[0], type->key.type);
1247 } else if (type->value.type == OVSDB_TYPE_VOID) {
1248 struct json **elems;
1251 elems = xmalloc(datum->n * sizeof *elems);
1252 for (i = 0; i < datum->n; i++) {
1253 elems[i] = ovsdb_atom_to_json(&datum->keys[i], type->key.type);
1256 return wrap_json("set", json_array_create(elems, datum->n));
1258 struct json **elems;
1261 elems = xmalloc(datum->n * sizeof *elems);
1262 for (i = 0; i < datum->n; i++) {
1263 elems[i] = json_array_create_2(
1264 ovsdb_atom_to_json(&datum->keys[i], type->key.type),
1265 ovsdb_atom_to_json(&datum->values[i], type->value.type));
1268 return wrap_json("map", json_array_create(elems, datum->n));
1273 skip_spaces(const char *p)
1275 while (isspace((unsigned char) *p)) {
1282 parse_atom_token(const char **s, const struct ovsdb_base_type *base,
1283 union ovsdb_atom *atom, struct ovsdb_symbol_table *symtab)
1285 char *token, *error;
1287 error = ovsdb_token_parse(s, &token);
1289 error = ovsdb_atom_from_string(atom, base, token, symtab);
1296 parse_key_value(const char **s, const struct ovsdb_type *type,
1297 union ovsdb_atom *key, union ovsdb_atom *value,
1298 struct ovsdb_symbol_table *symtab)
1300 const char *start = *s;
1303 error = parse_atom_token(s, &type->key, key, symtab);
1304 if (!error && type->value.type != OVSDB_TYPE_VOID) {
1305 *s = skip_spaces(*s);
1308 *s = skip_spaces(*s);
1309 error = parse_atom_token(s, &type->value, value, symtab);
1311 error = xasprintf("%s: syntax error at \"%c\" expecting \"=\"",
1315 ovsdb_atom_destroy(key, type->key.type);
1322 free_key_value(const struct ovsdb_type *type,
1323 union ovsdb_atom *key, union ovsdb_atom *value)
1325 ovsdb_atom_destroy(key, type->key.type);
1326 if (type->value.type != OVSDB_TYPE_VOID) {
1327 ovsdb_atom_destroy(value, type->value.type);
1331 /* Initializes 'datum' as a datum of the given 'type', parsing its contents
1332 * from 's'. The format of 's' is a series of space or comma separated atoms
1333 * or, for a map, '='-delimited pairs of atoms. Each atom must in a format
1334 * acceptable to ovsdb_atom_from_string(). Optionally, a set may be enclosed
1335 * in "[]" or a map in "{}"; for an empty set or map these punctuators are
1338 * Optionally, a symbol table may be supplied as 'symtab'. It is passed to
1339 * ovsdb_atom_to_string(). */
1341 ovsdb_datum_from_string(struct ovsdb_datum *datum,
1342 const struct ovsdb_type *type, const char *s,
1343 struct ovsdb_symbol_table *symtab)
1345 bool is_map = ovsdb_type_is_map(type);
1346 struct ovsdb_error *dberror;
1351 ovsdb_datum_init_empty(datum);
1353 /* Swallow a leading delimiter if there is one. */
1355 if (*p == (is_map ? '{' : '[')) {
1356 end_delim = is_map ? '}' : ']';
1357 p = skip_spaces(p + 1);
1360 return xstrdup("use \"{}\" to specify the empty map");
1362 return xstrdup("use \"[]\" to specify the empty set");
1368 while (*p && *p != end_delim) {
1369 union ovsdb_atom key, value;
1371 if (ovsdb_token_is_delim(*p)) {
1372 error = xasprintf("%s: unexpected \"%c\" parsing %s",
1373 s, *p, ovsdb_type_to_english(type));
1378 error = parse_key_value(&p, type, &key, &value, symtab);
1382 ovsdb_datum_add_unsafe(datum, &key, &value, type);
1383 free_key_value(type, &key, &value);
1385 /* Skip optional white space and comma. */
1388 p = skip_spaces(p + 1);
1392 if (*p != end_delim) {
1393 error = xasprintf("%s: missing \"%c\" at end of data", s, end_delim);
1397 p = skip_spaces(p + 1);
1399 error = xasprintf("%s: trailing garbage after \"%c\"",
1405 if (datum->n < type->n_min) {
1406 error = xasprintf("%s: %u %s specified but the minimum number is %u",
1407 s, datum->n, is_map ? "pair(s)" : "value(s)",
1410 } else if (datum->n > type->n_max) {
1411 error = xasprintf("%s: %u %s specified but the maximum number is %u",
1412 s, datum->n, is_map ? "pair(s)" : "value(s)",
1417 dberror = ovsdb_datum_sort(datum, type->key.type);
1419 ovsdb_error_destroy(dberror);
1420 if (ovsdb_type_is_map(type)) {
1421 error = xasprintf("%s: map contains duplicate key", s);
1423 error = xasprintf("%s: set contains duplicate value", s);
1431 ovsdb_datum_destroy(datum, type);
1432 ovsdb_datum_init_empty(datum);
1436 /* Appends to 'out' the 'datum' (with the given 'type') in a format acceptable
1437 * to ovsdb_datum_from_string(). */
1439 ovsdb_datum_to_string(const struct ovsdb_datum *datum,
1440 const struct ovsdb_type *type, struct ds *out)
1442 bool is_map = ovsdb_type_is_map(type);
1445 if (type->n_max > 1 || !datum->n) {
1446 ds_put_char(out, is_map ? '{' : '[');
1448 for (i = 0; i < datum->n; i++) {
1450 ds_put_cstr(out, ", ");
1453 ovsdb_atom_to_string(&datum->keys[i], type->key.type, out);
1455 ds_put_char(out, '=');
1456 ovsdb_atom_to_string(&datum->values[i], type->value.type, out);
1459 if (type->n_max > 1 || !datum->n) {
1460 ds_put_char(out, is_map ? '}' : ']');
1465 hash_atoms(enum ovsdb_atomic_type type, const union ovsdb_atom *atoms,
1466 unsigned int n, uint32_t basis)
1468 if (type != OVSDB_TYPE_VOID) {
1471 for (i = 0; i < n; i++) {
1472 basis = ovsdb_atom_hash(&atoms[i], type, basis);
1479 ovsdb_datum_hash(const struct ovsdb_datum *datum,
1480 const struct ovsdb_type *type, uint32_t basis)
1482 basis = hash_atoms(type->key.type, datum->keys, datum->n, basis);
1483 basis ^= (type->key.type << 24) | (type->value.type << 16) | datum->n;
1484 basis = hash_atoms(type->value.type, datum->values, datum->n, basis);
1489 atom_arrays_compare_3way(const union ovsdb_atom *a,
1490 const union ovsdb_atom *b,
1491 enum ovsdb_atomic_type type,
1496 for (i = 0; i < n; i++) {
1497 int cmp = ovsdb_atom_compare_3way(&a[i], &b[i], type);
1507 ovsdb_datum_equals(const struct ovsdb_datum *a,
1508 const struct ovsdb_datum *b,
1509 const struct ovsdb_type *type)
1511 return !ovsdb_datum_compare_3way(a, b, type);
1515 ovsdb_datum_compare_3way(const struct ovsdb_datum *a,
1516 const struct ovsdb_datum *b,
1517 const struct ovsdb_type *type)
1522 return a->n < b->n ? -1 : 1;
1525 cmp = atom_arrays_compare_3way(a->keys, b->keys, type->key.type, a->n);
1530 return (type->value.type == OVSDB_TYPE_VOID ? 0
1531 : atom_arrays_compare_3way(a->values, b->values, type->value.type,
1535 /* If 'key' is one of the keys in 'datum', returns its index within 'datum',
1536 * otherwise UINT_MAX. 'key.type' must be the type of the atoms stored in the
1537 * 'keys' array in 'datum'.
1540 ovsdb_datum_find_key(const struct ovsdb_datum *datum,
1541 const union ovsdb_atom *key,
1542 enum ovsdb_atomic_type key_type)
1544 unsigned int low = 0;
1545 unsigned int high = datum->n;
1546 while (low < high) {
1547 unsigned int idx = (low + high) / 2;
1548 int cmp = ovsdb_atom_compare_3way(key, &datum->keys[idx], key_type);
1551 } else if (cmp > 0) {
1560 /* If 'key' and 'value' is one of the key-value pairs in 'datum', returns its
1561 * index within 'datum', otherwise UINT_MAX. 'key.type' must be the type of
1562 * the atoms stored in the 'keys' array in 'datum'. 'value_type' may be the
1563 * type of the 'values' atoms or OVSDB_TYPE_VOID to compare only keys.
1566 ovsdb_datum_find_key_value(const struct ovsdb_datum *datum,
1567 const union ovsdb_atom *key,
1568 enum ovsdb_atomic_type key_type,
1569 const union ovsdb_atom *value,
1570 enum ovsdb_atomic_type value_type)
1572 unsigned int idx = ovsdb_datum_find_key(datum, key, key_type);
1574 && value_type != OVSDB_TYPE_VOID
1575 && !ovsdb_atom_equals(&datum->values[idx], value, value_type)) {
1581 /* If atom 'i' in 'a' is also in 'b', returns its index in 'b', otherwise
1582 * UINT_MAX. 'type' must be the type of 'a' and 'b', except that
1583 * type->value.type may be set to OVSDB_TYPE_VOID to compare keys but not
1586 ovsdb_datum_find(const struct ovsdb_datum *a, int i,
1587 const struct ovsdb_datum *b,
1588 const struct ovsdb_type *type)
1590 return ovsdb_datum_find_key_value(b,
1591 &a->keys[i], type->key.type,
1592 a->values ? &a->values[i] : NULL,
1596 /* Returns true if every element in 'a' is also in 'b', false otherwise. */
1598 ovsdb_datum_includes_all(const struct ovsdb_datum *a,
1599 const struct ovsdb_datum *b,
1600 const struct ovsdb_type *type)
1604 for (i = 0; i < a->n; i++) {
1605 if (ovsdb_datum_find(a, i, b, type) == UINT_MAX) {
1612 /* Returns true if no element in 'a' is also in 'b', false otherwise. */
1614 ovsdb_datum_excludes_all(const struct ovsdb_datum *a,
1615 const struct ovsdb_datum *b,
1616 const struct ovsdb_type *type)
1620 for (i = 0; i < a->n; i++) {
1621 if (ovsdb_datum_find(a, i, b, type) != UINT_MAX) {
1629 ovsdb_datum_reallocate(struct ovsdb_datum *a, const struct ovsdb_type *type,
1630 unsigned int capacity)
1632 a->keys = xrealloc(a->keys, capacity * sizeof *a->keys);
1633 if (type->value.type != OVSDB_TYPE_VOID) {
1634 a->values = xrealloc(a->values, capacity * sizeof *a->values);
1638 /* Removes the element with index 'idx' from 'datum', which has type 'type'.
1639 * If 'idx' is not the last element in 'datum', then the removed element is
1640 * replaced by the (former) last element.
1642 * This function does not maintain ovsdb_datum invariants. Use
1643 * ovsdb_datum_sort() to check and restore these invariants. */
1645 ovsdb_datum_remove_unsafe(struct ovsdb_datum *datum, size_t idx,
1646 const struct ovsdb_type *type)
1648 ovsdb_atom_destroy(&datum->keys[idx], type->key.type);
1649 datum->keys[idx] = datum->keys[datum->n - 1];
1650 if (type->value.type != OVSDB_TYPE_VOID) {
1651 ovsdb_atom_destroy(&datum->values[idx], type->value.type);
1652 datum->values[idx] = datum->values[datum->n - 1];
1657 /* Adds the element with the given 'key' and 'value' to 'datum', which must
1658 * have the specified 'type'.
1660 * This function always allocates memory, so it is not an efficient way to add
1661 * a number of elements to a datum.
1663 * This function does not maintain ovsdb_datum invariants. Use
1664 * ovsdb_datum_sort() to check and restore these invariants. (But a datum with
1665 * 0 or 1 elements cannot violate the invariants anyhow.) */
1667 ovsdb_datum_add_unsafe(struct ovsdb_datum *datum,
1668 const union ovsdb_atom *key,
1669 const union ovsdb_atom *value,
1670 const struct ovsdb_type *type)
1672 size_t idx = datum->n++;
1673 datum->keys = xrealloc(datum->keys, datum->n * sizeof *datum->keys);
1674 ovsdb_atom_clone(&datum->keys[idx], key, type->key.type);
1675 if (type->value.type != OVSDB_TYPE_VOID) {
1676 datum->values = xrealloc(datum->values,
1677 datum->n * sizeof *datum->values);
1678 ovsdb_atom_clone(&datum->values[idx], value, type->value.type);
1683 ovsdb_datum_union(struct ovsdb_datum *a, const struct ovsdb_datum *b,
1684 const struct ovsdb_type *type, bool replace)
1690 for (bi = 0; bi < b->n; bi++) {
1693 ai = ovsdb_datum_find_key(a, &b->keys[bi], type->key.type);
1694 if (ai == UINT_MAX) {
1696 ovsdb_datum_reallocate(a, type, a->n + (b->n - bi));
1698 ovsdb_atom_clone(&a->keys[n], &b->keys[bi], type->key.type);
1699 if (type->value.type != OVSDB_TYPE_VOID) {
1700 ovsdb_atom_clone(&a->values[n], &b->values[bi],
1704 } else if (replace && type->value.type != OVSDB_TYPE_VOID) {
1705 ovsdb_atom_destroy(&a->values[ai], type->value.type);
1706 ovsdb_atom_clone(&a->values[ai], &b->values[bi],
1711 struct ovsdb_error *error;
1713 error = ovsdb_datum_sort(a, type->key.type);
1719 ovsdb_datum_subtract(struct ovsdb_datum *a, const struct ovsdb_type *a_type,
1720 const struct ovsdb_datum *b,
1721 const struct ovsdb_type *b_type)
1723 bool changed = false;
1726 assert(a_type->key.type == b_type->key.type);
1727 assert(a_type->value.type == b_type->value.type
1728 || b_type->value.type == OVSDB_TYPE_VOID);
1730 /* XXX The big-O of this could easily be improved. */
1731 for (i = 0; i < a->n; ) {
1732 unsigned int idx = ovsdb_datum_find(a, i, b, b_type);
1733 if (idx != UINT_MAX) {
1735 ovsdb_datum_remove_unsafe(a, i, a_type);
1741 ovsdb_datum_sort_assert(a, a_type->key.type);
1745 struct ovsdb_symbol_table {
1749 struct ovsdb_symbol_table *
1750 ovsdb_symbol_table_create(void)
1752 struct ovsdb_symbol_table *symtab = xmalloc(sizeof *symtab);
1753 shash_init(&symtab->sh);
1758 ovsdb_symbol_table_destroy(struct ovsdb_symbol_table *symtab)
1761 shash_destroy_free_data(&symtab->sh);
1766 struct ovsdb_symbol *
1767 ovsdb_symbol_table_get(const struct ovsdb_symbol_table *symtab,
1770 return shash_find_data(&symtab->sh, name);
1773 struct ovsdb_symbol *
1774 ovsdb_symbol_table_put(struct ovsdb_symbol_table *symtab, const char *name,
1775 const struct uuid *uuid, bool used)
1777 struct ovsdb_symbol *symbol;
1779 assert(!ovsdb_symbol_table_get(symtab, name));
1780 symbol = xmalloc(sizeof *symbol);
1781 symbol->uuid = *uuid;
1782 symbol->used = used;
1783 shash_add(&symtab->sh, name, symbol);
1787 struct ovsdb_symbol *
1788 ovsdb_symbol_table_insert(struct ovsdb_symbol_table *symtab,
1791 struct ovsdb_symbol *symbol;
1793 symbol = ovsdb_symbol_table_get(symtab, name);
1797 uuid_generate(&uuid);
1798 symbol = ovsdb_symbol_table_put(symtab, name, &uuid, false);
1804 ovsdb_symbol_table_find_unused(const struct ovsdb_symbol_table *symtab)
1806 struct shash_node *node;
1808 SHASH_FOR_EACH (node, &symtab->sh) {
1809 struct ovsdb_symbol *symbol = node->data;
1810 if (!symbol->used) {
1818 /* Extracts a token from the beginning of 's' and returns a pointer just after
1819 * the token. Stores the token itself into '*outp', which the caller is
1820 * responsible for freeing (with free()).
1822 * If 's[0]' is a delimiter, the returned token is the empty string.
1824 * A token extends from 's' to the first delimiter, as defined by
1825 * ovsdb_token_is_delim(), or until the end of the string. A delimiter can be
1826 * escaped with a backslash, in which case the backslash does not appear in the
1827 * output. Double quotes also cause delimiters to be ignored, but the double
1828 * quotes are retained in the output. (Backslashes inside double quotes are
1829 * not removed, either.)
1832 ovsdb_token_parse(const char **s, char **outp)
1841 for (p = *s; *p != '\0'; ) {
1845 ds_put_char(&out, '\\');
1848 error = xasprintf("%s: backslash at end of argument", *s);
1851 ds_put_char(&out, *p++);
1852 } else if (!in_quotes && ovsdb_token_is_delim(c)) {
1856 ds_put_char(&out, c);
1858 in_quotes = !in_quotes;
1863 error = xasprintf("%s: quoted string extends past end of argument",
1867 *outp = ds_cstr(&out);
1877 /* Returns true if 'c' delimits tokens, or if 'c' is 0, and false otherwise. */
1879 ovsdb_token_is_delim(unsigned char c)
1881 return strchr(":=, []{}!<>", c) != NULL;