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1.0.0-beta1
TLS / SSL OpenSSL-based native driver for Erlang / Elixir
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c_src/ioqueue.c
/*
* Copyright (C) 2002-2019 ProcessOne, SARL. All Rights Reserved.
*
* 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 <stdlib.h>
#include <memory.h>
#include "ioqueue.h"
ioqueue *ioqueue_create() {
ioqueue *q = malloc(sizeof(ioqueue));
if (q) {
q->buf = NULL;
q->size = 0;
q->capacity = 0;
}
return q;
}
void ioqueue_free(ioqueue *queue) {
if (queue->buf) {
free(queue->buf);
}
free(queue);
}
void ioqueue_consume(ioqueue *queue, size_t bytes) {
queue->size -= bytes;
if (queue->size > 0) {
memmove(queue->buf, queue->buf + bytes, queue->size);
} else {
free(queue->buf);
queue->buf = NULL;
queue->capacity = 0;
}
}
int ioqueue_append(ioqueue *queue, const char *buf, size_t bytes) {
if (queue->capacity - queue->size < bytes) {
char *new_buf = realloc(queue->buf, queue->size + bytes);
if (!new_buf) {
return 0;
}
queue->buf = new_buf;
queue->capacity = queue->size + bytes;
}
memcpy(queue->buf + queue->size, buf, bytes);
queue->size += bytes;
return 1;
}