lib/includes/hicn/util/array.h


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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200

/*
 * Copyright (c) 2017-2019 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 array.h
 * \brief Generic array template
 */

#ifndef UTIL_ARRAY_H
#define UTIL_ARRAY_H

#include <assert.h>
#include <hicn/util/log.h>
#include <math.h> // log2
#include <string.h> // memmove

#define BUFSIZE 1024

typedef int(*cmp_t)(const void * x, const void * y);

#define TYPEDEF_ARRAY_H(NAME, T)                                                \
                                                                                \
typedef struct {                                                                \
    size_t size;                                                                \
    size_t max_size_log;                                                        \
    T * elements;                                                               \
} NAME ## _t;                                                                   \
                                                                                \
int NAME ## _initialize(NAME ## _t * array);                                    \
                                                                                \
int NAME ## _finalize(NAME ## _t * array);                                      \
                                                                                \
NAME ## _t * NAME ## _create();                                                 \
                                                                                \
void NAME ## _free(NAME ## _t * array);                                         \
                                                                                \
int NAME ## _add(NAME ## _t * array, T element);                                \
                                                                                \
int NAME ## _remove_index(NAME ## _t * array, int index, T * element);          \
                                                                                \
int NAME ## _remove(NAME ## _t * array, const T search, T * element);           \
                                                                                \
int NAME ## _get(const NAME ## _t * array, const T search, T * element);        \
                                                                                \
int NAME ## _get_index(const NAME ## _t * array, int index, T * element);       \
                                                                                \
int NAME ## _get_elements(const NAME ## _t * array, T ** elements);             \
                                                                                \
size_t NAME ## _len(const NAME ## _t * array);


#define ARRAY_MAX_SIZE_LOG_INIT 0

#define TYPEDEF_ARRAY(NAME, T, CMP, SNPRINTF)                                   \
int                                                                             \
NAME ## _initialize(NAME ## _t * array)                                         \
{                                                                               \
    array->max_size_log = ARRAY_MAX_SIZE_LOG_INIT;                              \
    array->size = 0;                                                            \
    if (array->max_size_log == 0) {                                             \
        array->elements = NULL;                                                 \
        return 0;                                                               \
    }                                                                           \
    array->elements = malloc((1 << array->max_size_log) * sizeof(T));           \
    if (!array->elements)                                                       \
        return -1;                                                              \
    return 0;                                                                   \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _finalize(NAME ## _t * array)                                           \
{                                                                               \
    for (unsigned i = 0; i < array->size; i++) {                                \
        NAME ## _remove_index(array, i, NULL);                                  \
    }                                                                           \
    return 0;                                                                   \
}                                                                               \
                                                                                \
NAME ## _t *                                                                    \
NAME ## _create()                                                               \
{                                                                               \
    NAME ## _t * array = malloc(sizeof(NAME ## _t));                            \
    if (!array)                                                                 \
        goto ERR_MALLOC;                                                        \
                                                                                \
    if (NAME ## _initialize(array) < 0)                                         \
        goto ERR_INITIALIZE;                                                    \
                                                                                \
    return array;                                                               \
                                                                                \
ERR_INITIALIZE:                                                                 \
    free(array);                                                                \
ERR_MALLOC:                                                                     \
    return NULL;                                                                \
}                                                                               \
                                                                                \
void                                                                            \
NAME ## _free(NAME ## _t * array)                                               \
{                                                                               \
    NAME ## _finalize(array);                                                   \
    free(array->elements);                                                      \
    free(array);                                                                \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _add(NAME ## _t * array, T element)                                     \
{                                                                               \
    /* Ensure sufficient space for next addition */                             \
    size_t new_size_log = (array->size > 0) ? log2(array->size)+1 : 1;          \
    if (new_size_log > array->max_size_log) {                                   \
        array->max_size_log = new_size_log;                                     \
        array->elements = realloc(array->elements,                              \
                (1 << new_size_log) * sizeof(T));                               \
    }                                                                           \
                                                                                \
    if (!array->elements)                                                       \
        goto ERR_REALLOC;                                                       \
                                                                                \
    array->elements[array->size++] = element;                                   \
    return 0;                                                                   \
                                                                                \
ERR_REALLOC:                                                                    \
    return -1;                                                                  \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _remove_index(NAME ## _t * array, int index, T * element)               \
{                                                                               \
    if (index > NAME ## _len(array))                                            \
        return -1;                                                              \
    if (element)                                                                \
        *element = array->elements[index];                                      \
    if (index < array->size)                                                    \
        memmove(array->elements + index, array->elements + index + 1,           \
                array->size - index);                                           \
    array->size--;                                                              \
    return 0;                                                                   \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _remove(NAME ## _t * array, const T search, T * element)                \
{                                                                               \
    for (unsigned i = 0; i < array->size; i++) {                                \
        if (CMP(search, array->elements[i]) == 0)                               \
            return facelet_array_remove_index(array, i, element);               \
    }                                                                           \
    /* Not found */                                                             \
    if (element)                                                                \
        *element = NULL;                                                        \
    return 0;                                                                   \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _get(const NAME ## _t * array, const T search, T * element)             \
{                                                                               \
    assert(element);                                                            \
    for (unsigned i = 0; i < array->size; i++)                                  \
        if (CMP(search, array->elements[i]) == 0) {                             \
            *element = array->elements[i];                                      \
            return 0;                                                           \
        }                                                                       \
    /* Not found */                                                             \
    *element = NULL;                                                            \
    return 0;                                                                   \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _get_index(const NAME ## _t * array, int index, T * element)            \
{                                                                               \
    assert(element);                                                            \
    *element = array->elements[index];                                          \
    return 0;                                                                   \
}                                                                               \
                                                                                \
int                                                                             \
NAME ## _get_elements(const NAME ## _t * array, T ** elements)                  \
{                                                                               \
    *elements = array->elements;                                                \
    return 0;                                                                   \
}                                                                               \
                                                                                \
size_t                                                                          \
NAME ## _len(const NAME ## _t * array)                                          \
{                                                                               \
    return array->size;                                                         \
}

#endif /* UTIL_ARRAY_H */