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/*
* Copyright (c) 2021-2022 Cisco and/or its affiliates.
* 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.
*/
/**
* \file data.c
* \brief Implementation of request result data.
*/
#include <assert.h>
#include <stdlib.h>
#include <hicn/ctrl/data.h>
#include <hicn/ctrl/object.h>
#include <hicn/util/log.h>
#define MIN_ALLOC_SIZE 8
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
struct hc_data_s {
hc_object_type_t object_type;
bool complete;
/**
* >=0 success, indicates the number of records in array
* <0 error
*/
ssize_t size;
size_t alloc_size; /** Allocated size (a power of 2 when managed
automatically) */
size_t max_size; /** Maximum size defined at creation (0 = unlimited) */
uint8_t *buffer;
};
void _hc_data_clear(hc_data_t *data) {
data->complete = false;
data->buffer = NULL;
data->max_size = 0;
data->alloc_size = 0;
data->size = 0;
}
hc_data_t *hc_data_create(hc_object_type_t object_type) {
hc_data_t *data = malloc(sizeof(hc_data_t));
if (!data) return NULL;
data->object_type = object_type;
_hc_data_clear(data);
return data;
// data->buffer = malloc((1 << data->max_size_log) * data->out_element_size);
// if (!data->buffer) goto ERR_BUFFER;
}
void hc_data_free(hc_data_t *data) {
assert(data);
if (data->buffer) free(data->buffer);
free(data);
}
int hc_data_set_max_size(hc_data_t *data, size_t max_size) {
if (data->size > max_size) return -1;
data->max_size = max_size;
return 0;
}
const uint8_t *hc_data_get_buffer(hc_data_t *data) { return data->buffer; }
const uint8_t *hc_data_get_free(hc_data_t *data) {
if (!data) return NULL;
if (data->max_size > 0 && data->size >= data->max_size) return NULL;
hc_object_type_t object_type = hc_data_get_object_type(data);
size_t object_size = hc_object_size(object_type);
return data->buffer + data->size * object_size;
}
void hc_data_inc_size(hc_data_t *data) { data->size++; }
hc_object_type_t hc_data_get_object_type(const hc_data_t *data) {
return data->object_type;
}
void hc_data_set_object_type(hc_data_t *data, hc_object_type_t object_type) {
data->object_type = object_type;
}
ssize_t hc_data_get_size(const hc_data_t *data) { return data->size; }
int hc_data_clear(hc_data_t *data) {
free(data->buffer);
_hc_data_clear(data);
return 0;
}
int _hc_data_allocate(hc_data_t *data, size_t size) {
data->buffer =
realloc(data->buffer, size * hc_object_size(data->object_type));
if (!data->buffer) goto ERR;
data->alloc_size = size;
return 0;
ERR:
data->alloc_size = 0;
return -1;
}
int hc_data_allocate(hc_data_t *data, size_t size) {
/* Do not allocate twice */
if (data->buffer) return -1;
if (data->max_size > 0 && size > data->max_size) return -1;
return _hc_data_allocate(data, size);
}
int hc_data_ensure_available(hc_data_t *data, size_t count) {
size_t new_size = data->size + count;
if (new_size < data->alloc_size) return 0;
if (data->max_size > 0 && new_size > data->max_size) return -1;
size_t new_alloc_size = MAX(MIN_ALLOC_SIZE, next_pow2(new_size));
if (data->max_size > 0 && new_alloc_size > data->max_size)
new_alloc_size = data->max_size;
return _hc_data_allocate(data, new_alloc_size);
}
int hc_data_push_many(hc_data_t *data, const void *elements, size_t count) {
if (!data) return -1;
if (!elements) return -1;
if (count < 1) return -1;
if (hc_data_ensure_available(data, count) < 0) return -1;
hc_object_type_t object_type = hc_data_get_object_type(data);
size_t object_size = hc_object_size(object_type);
uint8_t *dst = data->buffer + data->size * object_size;
memcpy(dst, elements, count * object_size);
data->size += count;
return 0;
}
int hc_data_push(hc_data_t *data, const void *element) {
return hc_data_push_many(data, element, 1);
}
#if 0
/**
*
* NOTE: This function make sure there is enough room available in the data
* structure.
*/
u8 *hc_data_get_next(hc_data_t *data) {
if (hc_data_ensure_available(data, 1) < 0) return NULL;
return data->buffer + data->size * data->out_element_size;
}
int hc_data_set_callback(hc_data_t *data, data_callback_t cb, void *cb_data) {
data->complete_cb = cb;
data->complete_cb_data = cb_data;
return 0;
}
#endif
void hc_data_set_complete(hc_data_t *data) { data->complete = true; }
bool hc_data_is_complete(const hc_data_t *data) { return data->complete; }
void hc_data_set_error(hc_data_t *data) {
data->size = -1;
data->complete = true;
}
bool hc_data_get_result(hc_data_t *data) { return (data->size >= 0); }
hc_object_t *hc_data_find(hc_data_t *data, hc_object_t *object) {
hc_object_type_t object_type = hc_data_get_object_type(data);
hc_data_foreach(data, found, {
if (hc_object_cmp(object_type, object, found) == 0) return found;
});
return NULL;
}
const hc_object_t *hc_data_get_object(const hc_data_t *data, off_t pos) {
size_t size = hc_data_get_size(data);
if (pos >= size) return NULL;
hc_object_type_t object_type = hc_data_get_object_type(data);
size_t object_size = hc_object_size(object_type);
return (const hc_object_t *)(data->buffer + pos * object_size);
}
#if 0
int hc_data_reset(hc_data_t *data) {
data->size = 0;
return 0;
}
#endif
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