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/column.h"
24 #include "ovsdb-error.h"
25 #include "ovsdb-parser.h"
30 ovsdb_column_create(const char *name, const char *comment,
31 bool mutable, bool persistent,
32 const struct ovsdb_type *type)
34 /* Doesn't set the new column's 'index': the caller must do that. */
35 struct ovsdb_column *column;
37 column = xzalloc(sizeof *column);
38 column->name = xstrdup(name);
39 column->comment = comment ? xstrdup(comment) : NULL;
40 column->mutable = mutable;
41 column->persistent = persistent;
42 ovsdb_type_clone(&column->type, type);
48 ovsdb_column_clone(const struct ovsdb_column *old)
50 /* Doesn't copy the column's 'index': the caller must do that. */
51 return ovsdb_column_create(old->name, old->comment,
52 old->mutable, old->persistent,
57 ovsdb_column_destroy(struct ovsdb_column *column)
59 ovsdb_type_destroy(&column->type);
61 free(column->comment);
66 ovsdb_column_from_json(const struct json *json, const char *name,
67 struct ovsdb_column **columnp)
69 const struct json *comment, *mutable, *ephemeral, *type_json;
70 struct ovsdb_error *error;
71 struct ovsdb_type type;
72 struct ovsdb_parser parser;
77 ovsdb_parser_init(&parser, json, "schema for column %s", name);
78 comment = ovsdb_parser_member(&parser, "comment", OP_STRING | OP_OPTIONAL);
79 mutable = ovsdb_parser_member(&parser, "mutable",
80 OP_TRUE | OP_FALSE | OP_OPTIONAL);
81 ephemeral = ovsdb_parser_member(&parser, "ephemeral",
82 OP_TRUE | OP_FALSE | OP_OPTIONAL);
83 type_json = ovsdb_parser_member(&parser, "type", OP_STRING | OP_OBJECT);
84 error = ovsdb_parser_finish(&parser);
89 error = ovsdb_type_from_json(&type, type_json);
94 persistent = ephemeral ? !json_boolean(ephemeral) : true;
95 *columnp = ovsdb_column_create(name,
96 comment ? json_string(comment) : NULL,
97 mutable ? json_boolean(mutable) : true,
100 ovsdb_type_destroy(&type);
106 ovsdb_column_to_json(const struct ovsdb_column *column)
108 struct json *json = json_object_create();
109 if (column->comment) {
110 json_object_put_string(json, "comment", column->comment);
112 if (!column->mutable) {
113 json_object_put(json, "mutable", json_boolean_create(false));
115 if (!column->persistent) {
116 json_object_put(json, "ephemeral", json_boolean_create(true));
118 json_object_put(json, "type", ovsdb_type_to_json(&column->type));
123 ovsdb_column_set_init(struct ovsdb_column_set *set)
126 set->n_columns = set->allocated_columns = 0;
130 ovsdb_column_set_destroy(struct ovsdb_column_set *set)
136 ovsdb_column_set_clone(struct ovsdb_column_set *new,
137 const struct ovsdb_column_set *old)
139 new->columns = xmemdup(old->columns,
140 old->n_columns * sizeof *old->columns);
141 new->n_columns = new->allocated_columns = old->n_columns;
145 ovsdb_column_set_from_json(const struct json *json,
146 const struct ovsdb_table *table,
147 struct ovsdb_column_set *set)
149 ovsdb_column_set_init(set);
151 struct shash_node *node;
153 SHASH_FOR_EACH (node, &table->schema->columns) {
154 const struct ovsdb_column *column = node->data;
155 ovsdb_column_set_add(set, column);
160 struct ovsdb_error *error = NULL;
163 if (json->type != JSON_ARRAY) {
167 /* XXX this is O(n**2) */
168 for (i = 0; i < json->u.array.n; i++) {
169 const struct ovsdb_column *column;
172 if (json->u.array.elems[i]->type != JSON_STRING) {
176 s = json->u.array.elems[i]->u.string;
177 column = shash_find_data(&table->schema->columns, s);
179 error = ovsdb_syntax_error(json, NULL, "%s is not a valid "
182 } else if (ovsdb_column_set_contains(set, column->index)) {
185 ovsdb_column_set_add(set, column);
190 ovsdb_column_set_destroy(set);
191 ovsdb_column_set_init(set);
193 error = ovsdb_syntax_error(json, NULL, "array of distinct column "
201 ovsdb_column_set_to_json(const struct ovsdb_column_set *set)
206 json = json_array_create_empty();
207 for (i = 0; i < set->n_columns; i++) {
208 json_array_add(json, json_string_create(set->columns[i]->name));
214 ovsdb_column_set_add(struct ovsdb_column_set *set,
215 const struct ovsdb_column *column)
217 if (set->n_columns >= set->allocated_columns) {
218 set->columns = x2nrealloc(set->columns, &set->allocated_columns,
219 sizeof *set->columns);
221 set->columns[set->n_columns++] = column;
225 ovsdb_column_set_add_all(struct ovsdb_column_set *set,
226 const struct ovsdb_table *table)
228 struct shash_node *node;
230 SHASH_FOR_EACH (node, &table->schema->columns) {
231 const struct ovsdb_column *column = node->data;
232 ovsdb_column_set_add(set, column);
237 ovsdb_column_set_contains(const struct ovsdb_column_set *set,
238 unsigned int column_index)
242 for (i = 0; i < set->n_columns; i++) {
243 if (set->columns[i]->index == column_index) {
250 /* This comparison is sensitive to ordering of columns within a set, but that's
251 * good: the only existing caller wants to make sure that hash values are
252 * comparable, which is only true if column ordering is the same. */
254 ovsdb_column_set_equals(const struct ovsdb_column_set *a,
255 const struct ovsdb_column_set *b)
259 if (a->n_columns != b->n_columns) {
262 for (i = 0; i < a->n_columns; i++) {
263 if (a->columns[i] != b->columns[i]) {