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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* CMetrics
* ========
* Copyright 2021-2022 The CMetrics Authors
*
* 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 <cmetrics/cmetrics.h>
#include <cmetrics/cmt_label.h>
/*
* This interface file provide helper functions to compose a dynamic list
* of custom labels with specific keys and values. Note that this is not
* about labels defined by metrics upon creation, but label lists to be
* used by the encoders when formatting the data.
*/
struct cmt_labels *cmt_labels_create()
{
struct cmt_labels *l;
l = malloc(sizeof(struct cmt_labels));
if (!l) {
cmt_errno();
return NULL;
}
cfl_list_init(&l->list);
return l;
}
void cmt_labels_destroy(struct cmt_labels *labels)
{
struct cfl_list *tmp;
struct cfl_list *head;
struct cmt_label *l;
cfl_list_foreach_safe(head, tmp, &labels->list) {
l = cfl_list_entry(head, struct cmt_label, _head);
if (l->key) {
cfl_sds_destroy(l->key);
}
if (l->val) {
cfl_sds_destroy(l->val);
}
cfl_list_del(&l->_head);
free(l);
}
free(labels);
}
int cmt_labels_add_kv(struct cmt_labels *labels, char *key, char *val)
{
struct cmt_label *l;
l = malloc(sizeof(struct cmt_label));
if (!l) {
cmt_errno();
return -1;
}
l->key = cfl_sds_create(key);
if (!l->key) {
free(l);
return -1;
}
l->val = cfl_sds_create(val);
if (!l->val) {
cfl_sds_destroy(l->key);
free(l);
return -1;
}
cfl_list_add(&l->_head, &labels->list);
return 0;
}
int cmt_labels_count(struct cmt_labels *labels)
{
int c = 0;
struct cfl_list *head;
cfl_list_foreach(head, &labels->list) {
c++;
}
return c;
}
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