1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* Copyright (c) 2020 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 vector.h
* \brief Resizeable static array
*/
#ifndef UTIL_VECTOR_H
#define UTIL_VECTOR_H
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include "common.h"
/** Local variable naming macro. */
#define _vector_var(v) _vector_##v
typedef struct {
size_t num_elts;
size_t max_elts;
} vector_hdr_t;
void _vector_init(void ** vector_ptr, size_t elt_size, size_t max_elts);
void _vector_free(void ** vector_ptr);
void _vector_resize(void ** vector_ptr, size_t elt_size, off_t pos);
/* Make sure elements following the header are aligned */
#define VECTOR_HDRLEN SIZEOF_ALIGNED(vector_hdr_t)
/* This header actually prepends the actual content of the vector */
#define vector_hdr(vector) ((vector_hdr_t *)((uint8_t*)vector - VECTOR_HDRLEN))
#define vector_init(vector, max_elts) \
_vector_init((void**)&vector, sizeof(vector[0]), max_elts)
#define vector_free(vector) \
_vector_free(&vector)
#define vector_len(vector) (vector_hdr(vector)->num_elts)
#define vector_resize(vector) _vector_resize((void**)&(vector), sizeof((vector)[0]), 0)
#define vector_ensure_pos(vector, pos) \
do { \
if ((pos) >= vector_len(vector)) \
_vector_resize((void**)&(vector), sizeof((vector)[0]), pos); \
} while(0)
#define vector_push(vector, elt) \
do { \
vector_ensure_pos(vector_len(vector)); \
vector[vector_len(vector)++] = elt; \
} while(0)
#endif /* UTIL_VECTOR_H */
|