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80911bc2 DL |
1 | /* |
2 | * The following Red-Black tree implementation is based off code with | |
3 | * original copyright: | |
4 | * | |
5 | * Copyright (c) 2016 David Gwynne <dlg@openbsd.org> | |
6 | * | |
7 | * Permission to use, copy, modify, and distribute this software for any | |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
18 | */ | |
19 | ||
20 | #ifndef _FRR_TYPERB_H | |
21 | #define _FRR_TYPERB_H | |
22 | ||
23 | #include "typesafe.h" | |
24 | ||
eea3c899 RW |
25 | #ifdef __cplusplus |
26 | extern "C" { | |
27 | #endif | |
28 | ||
80911bc2 DL |
29 | struct typed_rb_entry { |
30 | struct typed_rb_entry *rbt_parent; | |
31 | struct typed_rb_entry *rbt_left; | |
32 | struct typed_rb_entry *rbt_right; | |
33 | unsigned int rbt_color; | |
34 | }; | |
35 | ||
36 | struct typed_rb_root { | |
37 | struct typed_rb_entry *rbt_root; | |
38 | size_t count; | |
39 | }; | |
40 | ||
571a045b | 41 | struct typed_rb_entry *typed_rb_insert(struct typed_rb_root *rbt, |
80911bc2 DL |
42 | struct typed_rb_entry *rbe, |
43 | int (*cmpfn)( | |
44 | const struct typed_rb_entry *a, | |
45 | const struct typed_rb_entry *b)); | |
571a045b | 46 | struct typed_rb_entry *typed_rb_remove(struct typed_rb_root *rbt, |
da098d78 | 47 | struct typed_rb_entry *rbe); |
daf3441d | 48 | const struct typed_rb_entry *typed_rb_find(const struct typed_rb_root *rbt, |
80911bc2 DL |
49 | const struct typed_rb_entry *rbe, |
50 | int (*cmpfn)( | |
51 | const struct typed_rb_entry *a, | |
52 | const struct typed_rb_entry *b)); | |
daf3441d | 53 | const struct typed_rb_entry *typed_rb_find_gteq(const struct typed_rb_root *rbt, |
80911bc2 DL |
54 | const struct typed_rb_entry *rbe, |
55 | int (*cmpfn)( | |
56 | const struct typed_rb_entry *a, | |
57 | const struct typed_rb_entry *b)); | |
daf3441d | 58 | const struct typed_rb_entry *typed_rb_find_lt(const struct typed_rb_root *rbt, |
80911bc2 DL |
59 | const struct typed_rb_entry *rbe, |
60 | int (*cmpfn)( | |
61 | const struct typed_rb_entry *a, | |
62 | const struct typed_rb_entry *b)); | |
daf3441d DL |
63 | struct typed_rb_entry *typed_rb_min(const struct typed_rb_root *rbt); |
64 | struct typed_rb_entry *typed_rb_next(const struct typed_rb_entry *rbe); | |
80911bc2 DL |
65 | |
66 | #define _PREDECL_RBTREE(prefix) \ | |
67 | struct prefix ## _head { struct typed_rb_root rr; }; \ | |
960b9a53 DL |
68 | struct prefix ## _item { struct typed_rb_entry re; }; \ |
69 | MACRO_REQUIRE_SEMICOLON() /* end */ | |
80911bc2 DL |
70 | |
71 | #define INIT_RBTREE_UNIQ(var) { } | |
72 | #define INIT_RBTREE_NONUNIQ(var) { } | |
73 | ||
74 | #define _DECLARE_RBTREE(prefix, type, field, cmpfn_nuq, cmpfn_uq) \ | |
75 | \ | |
76 | macro_inline void prefix ## _init(struct prefix##_head *h) \ | |
77 | { \ | |
78 | memset(h, 0, sizeof(*h)); \ | |
79 | } \ | |
80 | macro_inline void prefix ## _fini(struct prefix##_head *h) \ | |
81 | { \ | |
82 | memset(h, 0, sizeof(*h)); \ | |
83 | } \ | |
84 | macro_inline type *prefix ## _add(struct prefix##_head *h, type *item) \ | |
85 | { \ | |
86 | struct typed_rb_entry *re; \ | |
87 | re = typed_rb_insert(&h->rr, &item->field.re, cmpfn_uq); \ | |
88 | return container_of_null(re, type, field.re); \ | |
89 | } \ | |
daf3441d DL |
90 | macro_inline const type *prefix ## _const_find_gteq( \ |
91 | const struct prefix##_head *h, const type *item) \ | |
80911bc2 | 92 | { \ |
daf3441d | 93 | const struct typed_rb_entry *re; \ |
80911bc2 DL |
94 | re = typed_rb_find_gteq(&h->rr, &item->field.re, cmpfn_nuq); \ |
95 | return container_of_null(re, type, field.re); \ | |
96 | } \ | |
daf3441d DL |
97 | macro_inline const type *prefix ## _const_find_lt( \ |
98 | const struct prefix##_head *h, const type *item) \ | |
80911bc2 | 99 | { \ |
daf3441d | 100 | const struct typed_rb_entry *re; \ |
80911bc2 DL |
101 | re = typed_rb_find_lt(&h->rr, &item->field.re, cmpfn_nuq); \ |
102 | return container_of_null(re, type, field.re); \ | |
103 | } \ | |
daf3441d | 104 | TYPESAFE_FIND_CMP(prefix, type) \ |
da098d78 | 105 | macro_inline type *prefix ## _del(struct prefix##_head *h, type *item) \ |
80911bc2 | 106 | { \ |
da098d78 SW |
107 | struct typed_rb_entry *re; \ |
108 | re = typed_rb_remove(&h->rr, &item->field.re); \ | |
109 | return container_of_null(re, type, field.re); \ | |
80911bc2 DL |
110 | } \ |
111 | macro_inline type *prefix ## _pop(struct prefix##_head *h) \ | |
112 | { \ | |
113 | struct typed_rb_entry *re; \ | |
114 | re = typed_rb_min(&h->rr); \ | |
115 | if (!re) \ | |
116 | return NULL; \ | |
117 | typed_rb_remove(&h->rr, re); \ | |
118 | return container_of(re, type, field.re); \ | |
119 | } \ | |
507e0e5d | 120 | TYPESAFE_SWAP_ALL_SIMPLE(prefix) \ |
daf3441d | 121 | macro_pure const type *prefix ## _const_first(const struct prefix##_head *h) \ |
80911bc2 | 122 | { \ |
daf3441d | 123 | const struct typed_rb_entry *re; \ |
80911bc2 DL |
124 | re = typed_rb_min(&h->rr); \ |
125 | return container_of_null(re, type, field.re); \ | |
126 | } \ | |
daf3441d DL |
127 | macro_pure const type *prefix ## _const_next(const struct prefix##_head *h, \ |
128 | const type *item) \ | |
80911bc2 | 129 | { \ |
daf3441d | 130 | const struct typed_rb_entry *re; \ |
80911bc2 DL |
131 | re = typed_rb_next(&item->field.re); \ |
132 | return container_of_null(re, type, field.re); \ | |
133 | } \ | |
daf3441d | 134 | TYPESAFE_FIRST_NEXT(prefix, type) \ |
80911bc2 DL |
135 | macro_pure type *prefix ## _next_safe(struct prefix##_head *h, type *item) \ |
136 | { \ | |
137 | struct typed_rb_entry *re; \ | |
138 | re = item ? typed_rb_next(&item->field.re) : NULL; \ | |
139 | return container_of_null(re, type, field.re); \ | |
140 | } \ | |
0ca16c58 | 141 | macro_pure size_t prefix ## _count(const struct prefix##_head *h) \ |
80911bc2 DL |
142 | { \ |
143 | return h->rr.count; \ | |
144 | } \ | |
960b9a53 | 145 | MACRO_REQUIRE_SEMICOLON() /* end */ |
80911bc2 DL |
146 | |
147 | #define PREDECL_RBTREE_UNIQ(prefix) \ | |
148 | _PREDECL_RBTREE(prefix) | |
149 | #define DECLARE_RBTREE_UNIQ(prefix, type, field, cmpfn) \ | |
150 | \ | |
151 | macro_inline int prefix ## __cmp(const struct typed_rb_entry *a, \ | |
152 | const struct typed_rb_entry *b) \ | |
153 | { \ | |
154 | return cmpfn(container_of(a, type, field.re), \ | |
155 | container_of(b, type, field.re)); \ | |
156 | } \ | |
daf3441d DL |
157 | macro_inline const type *prefix ## _const_find(const struct prefix##_head *h, \ |
158 | const type *item) \ | |
80911bc2 | 159 | { \ |
daf3441d | 160 | const struct typed_rb_entry *re; \ |
80911bc2 DL |
161 | re = typed_rb_find(&h->rr, &item->field.re, &prefix ## __cmp); \ |
162 | return container_of_null(re, type, field.re); \ | |
163 | } \ | |
daf3441d | 164 | TYPESAFE_FIND(prefix, type) \ |
80911bc2 | 165 | \ |
960b9a53 DL |
166 | _DECLARE_RBTREE(prefix, type, field, prefix ## __cmp, prefix ## __cmp); \ |
167 | MACRO_REQUIRE_SEMICOLON() /* end */ | |
80911bc2 DL |
168 | |
169 | #define PREDECL_RBTREE_NONUNIQ(prefix) \ | |
170 | _PREDECL_RBTREE(prefix) | |
171 | #define DECLARE_RBTREE_NONUNIQ(prefix, type, field, cmpfn) \ | |
172 | \ | |
173 | macro_inline int prefix ## __cmp(const struct typed_rb_entry *a, \ | |
174 | const struct typed_rb_entry *b) \ | |
175 | { \ | |
176 | return cmpfn(container_of(a, type, field.re), \ | |
177 | container_of(b, type, field.re)); \ | |
178 | } \ | |
179 | macro_inline int prefix ## __cmp_uq(const struct typed_rb_entry *a, \ | |
180 | const struct typed_rb_entry *b) \ | |
181 | { \ | |
182 | int cmpval = cmpfn(container_of(a, type, field.re), \ | |
183 | container_of(b, type, field.re)); \ | |
184 | if (cmpval) \ | |
185 | return cmpval; \ | |
186 | if (a < b) \ | |
187 | return -1; \ | |
188 | if (a > b) \ | |
189 | return 1; \ | |
190 | return 0; \ | |
191 | } \ | |
192 | \ | |
960b9a53 DL |
193 | _DECLARE_RBTREE(prefix, type, field, prefix ## __cmp, prefix ## __cmp_uq); \ |
194 | MACRO_REQUIRE_SEMICOLON() /* end */ | |
80911bc2 | 195 | |
eea3c899 RW |
196 | #ifdef __cplusplus |
197 | } | |
198 | #endif | |
199 | ||
80911bc2 | 200 | #endif /* _FRR_TYPERB_H */ |