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/*
* Copyright (c) 2017-2018 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "openvswitch/namemap.h"
#include <ctype.h>
#include "hash.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/json.h"
void
namemap_init(struct namemap *map)
{
hmap_init(&map->by_name);
hmap_init(&map->by_number);
}
struct namemap_node *
namemap_find_by_name(const struct namemap *map, const char *name)
{
struct namemap_node *node;
HMAP_FOR_EACH_WITH_HASH (node, name_node, hash_string(name, 0),
&map->by_name) {
if (!strcmp(name, node->name)) {
return node;
}
}
return NULL;
}
struct namemap_node *
namemap_find_by_number(const struct namemap *map, uint32_t number)
{
struct namemap_node *node;
HMAP_FOR_EACH_IN_BUCKET (node, number_node, hash_int(number, 0),
&map->by_number) {
if (node->number == number) {
return node;
}
}
return NULL;
}
void
namemap_put(struct namemap *map, uint32_t number, const char *name)
{
struct namemap_node *node;
/* Look for duplicate name. */
node = namemap_find_by_name(map, name);
if (node) {
if (node->number != number) {
node->duplicate = true;
}
return;
}
/* Look for duplicate number. */
node = namemap_find_by_number(map, number);
if (node) {
node->duplicate = true;
return;
}
/* Add new node. */
node = xmalloc(sizeof *node);
hmap_insert(&map->by_number, &node->number_node, hash_int(number, 0));
hmap_insert(&map->by_name, &node->name_node, hash_string(name, 0));
node->number = number;
node->name = xstrdup(name);
node->duplicate = false;
}
void
namemap_destroy(struct namemap *map)
{
if (map) {
struct namemap_node *node;
HMAP_FOR_EACH_SAFE (node, name_node, &map->by_name) {
hmap_remove(&map->by_name, &node->name_node);
hmap_remove(&map->by_number, &node->number_node);
free(node->name);
free(node);
}
hmap_destroy(&map->by_name);
hmap_destroy(&map->by_number);
}
}
/* A table or port name doesn't need to be quoted if it is alphanumeric and
* starts with a letter. */
static bool
name_needs_quotes(const char *name)
{
if (!isalpha((unsigned char) name[0])) {
return true;
}
for (const char *p = name + 1; *p; p++) {
if (!isalnum((unsigned char) *p)) {
return true;
}
}
return false;
}
/* Appends port or table 'name' to 's', quoting it if necessary. */
void
namemap_put_name(const char *name, struct ds *s)
{
if (name_needs_quotes(name)) {
json_string_escape(name, s);
} else {
ds_put_cstr(s, name);
}
}
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