1 54be8251 2018-06-04 stsp /*
  2 54be8251 2018-06-04 stsp  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
  3 54be8251 2018-06-04 stsp  *
  4 54be8251 2018-06-04 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 54be8251 2018-06-04 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 54be8251 2018-06-04 stsp  * copyright notice and this permission notice appear in all copies.
  7 54be8251 2018-06-04 stsp  *
  8 54be8251 2018-06-04 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 54be8251 2018-06-04 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 54be8251 2018-06-04 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 54be8251 2018-06-04 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 54be8251 2018-06-04 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 54be8251 2018-06-04 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 54be8251 2018-06-04 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 54be8251 2018-06-04 stsp  */
 16 54be8251 2018-06-04 stsp 
 17 54be8251 2018-06-04 stsp #include <sys/queue.h>
 18 984e8a45 2018-11-05 stsp #include <sys/tree.h>
 19 54be8251 2018-06-04 stsp 
 20 54be8251 2018-06-04 stsp #include <stdlib.h>
 21 54be8251 2018-06-04 stsp #include <string.h>
 22 54be8251 2018-06-04 stsp #include <sha1.h>
 23 54be8251 2018-06-04 stsp #include <stdio.h>
 24 54be8251 2018-06-04 stsp #include <zlib.h>
 25 c6f420bf 2018-06-04 stsp #include <limits.h>
 26 788c352e 2018-06-16 stsp #include <time.h>
 27 54be8251 2018-06-04 stsp 
 28 54be8251 2018-06-04 stsp #include "got_object.h"
 29 54be8251 2018-06-04 stsp #include "got_error.h"
 30 54be8251 2018-06-04 stsp 
 31 54be8251 2018-06-04 stsp #include "got_lib_delta.h"
 32 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
 33 54be8251 2018-06-04 stsp #include "got_lib_object.h"
 34 54be8251 2018-06-04 stsp #include "got_lib_object_idset.h"
 35 54be8251 2018-06-04 stsp 
 36 54be8251 2018-06-04 stsp #ifndef nitems
 37 54be8251 2018-06-04 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 38 54be8251 2018-06-04 stsp #endif
 39 54be8251 2018-06-04 stsp 
 40 54be8251 2018-06-04 stsp struct got_object_idset_element {
 41 e336e3d6 2018-11-05 stsp 	RB_ENTRY(got_object_idset_element)	entry;
 42 54be8251 2018-06-04 stsp 	struct got_object_id id;
 43 54be8251 2018-06-04 stsp 	void *data;	/* API user data */
 44 54be8251 2018-06-04 stsp };
 45 54be8251 2018-06-04 stsp 
 46 e336e3d6 2018-11-05 stsp RB_HEAD(got_object_idset_tree, got_object_idset_element);
 47 984e8a45 2018-11-05 stsp 
 48 984e8a45 2018-11-05 stsp static int
 49 984e8a45 2018-11-05 stsp cmp_elements(const struct got_object_idset_element *e1,
 50 984e8a45 2018-11-05 stsp     const struct got_object_idset_element *e2)
 51 984e8a45 2018-11-05 stsp {
 52 984e8a45 2018-11-05 stsp 	return got_object_id_cmp(&e1->id, &e2->id);
 53 984e8a45 2018-11-05 stsp }
 54 984e8a45 2018-11-05 stsp 
 55 e336e3d6 2018-11-05 stsp RB_PROTOTYPE(got_object_idset_tree, got_object_idset_element, entry,
 56 984e8a45 2018-11-05 stsp     cmp_elements);
 57 984e8a45 2018-11-05 stsp 
 58 54be8251 2018-06-04 stsp struct got_object_idset {
 59 984e8a45 2018-11-05 stsp 	struct got_object_idset_tree entries;
 60 2bd394ff 2018-06-22 stsp 	int totelem;
 61 069f84d5 2018-06-11 stsp #define GOT_OBJECT_IDSET_MAX_ELEM INT_MAX
 62 54be8251 2018-06-04 stsp };
 63 54be8251 2018-06-04 stsp 
 64 54be8251 2018-06-04 stsp struct got_object_idset *
 65 60f2eee1 2018-07-08 stsp got_object_idset_alloc(void)
 66 54be8251 2018-06-04 stsp {
 67 54be8251 2018-06-04 stsp 	struct got_object_idset *set;
 68 54be8251 2018-06-04 stsp 
 69 984e8a45 2018-11-05 stsp 	set = malloc(sizeof(*set));
 70 54be8251 2018-06-04 stsp 	if (set == NULL)
 71 54be8251 2018-06-04 stsp 		return NULL;
 72 54be8251 2018-06-04 stsp 
 73 e336e3d6 2018-11-05 stsp 	RB_INIT(&set->entries);
 74 984e8a45 2018-11-05 stsp 	set->totelem = 0;
 75 54be8251 2018-06-04 stsp 
 76 54be8251 2018-06-04 stsp 	return set;
 77 54be8251 2018-06-04 stsp }
 78 54be8251 2018-06-04 stsp 
 79 54be8251 2018-06-04 stsp void
 80 54be8251 2018-06-04 stsp got_object_idset_free(struct got_object_idset *set)
 81 54be8251 2018-06-04 stsp {
 82 54be8251 2018-06-04 stsp 	struct got_object_idset_element *entry;
 83 54be8251 2018-06-04 stsp 
 84 e336e3d6 2018-11-05 stsp 	while ((entry = RB_MIN(got_object_idset_tree, &set->entries))) {
 85 e336e3d6 2018-11-05 stsp 		RB_REMOVE(got_object_idset_tree, &set->entries, entry);
 86 984e8a45 2018-11-05 stsp 		/* User data should be freed by caller. */
 87 984e8a45 2018-11-05 stsp 		free(entry);
 88 54be8251 2018-06-04 stsp 	}
 89 984e8a45 2018-11-05 stsp 
 90 54be8251 2018-06-04 stsp 	free(set);
 91 54be8251 2018-06-04 stsp }
 92 54be8251 2018-06-04 stsp 
 93 54be8251 2018-06-04 stsp const struct got_error *
 94 b36429ab 2018-11-05 stsp got_object_idset_add(struct got_object_idset *set, struct got_object_id *id,
 95 b36429ab 2018-11-05 stsp     void *data)
 96 54be8251 2018-06-04 stsp {
 97 b36429ab 2018-11-05 stsp 	struct got_object_idset_element *new;
 98 54be8251 2018-06-04 stsp 
 99 2bd394ff 2018-06-22 stsp 	if (set->totelem >= GOT_OBJECT_IDSET_MAX_ELEM)
100 c6f420bf 2018-06-04 stsp 		return got_error(GOT_ERR_NO_SPACE);
101 c6f420bf 2018-06-04 stsp 
102 294f39b0 2018-11-05 stsp 	new = malloc(sizeof(*new));
103 54be8251 2018-06-04 stsp 	if (new == NULL)
104 54be8251 2018-06-04 stsp 		return got_error_from_errno();
105 54be8251 2018-06-04 stsp 
106 54be8251 2018-06-04 stsp 	memcpy(&new->id, id, sizeof(new->id));
107 54be8251 2018-06-04 stsp 	new->data = data;
108 54be8251 2018-06-04 stsp 
109 e336e3d6 2018-11-05 stsp 	RB_INSERT(got_object_idset_tree, &set->entries, new);
110 b36429ab 2018-11-05 stsp 	set->totelem++;
111 b36429ab 2018-11-05 stsp 	return NULL;
112 54be8251 2018-06-04 stsp }
113 54be8251 2018-06-04 stsp 
114 984e8a45 2018-11-05 stsp static struct got_object_idset_element *
115 984e8a45 2018-11-05 stsp find_element(struct got_object_idset *set, struct got_object_id *id)
116 54be8251 2018-06-04 stsp {
117 60f2eee1 2018-07-08 stsp 	struct got_object_idset_element *entry;
118 54be8251 2018-06-04 stsp 
119 e336e3d6 2018-11-05 stsp 	entry = RB_ROOT(&set->entries);
120 984e8a45 2018-11-05 stsp 	while (entry) {
121 984e8a45 2018-11-05 stsp 		int cmp = got_object_id_cmp(id, &entry->id);
122 984e8a45 2018-11-05 stsp 		if (cmp < 0)
123 e336e3d6 2018-11-05 stsp 			entry = RB_LEFT(entry, entry);
124 984e8a45 2018-11-05 stsp 		else if (cmp > 0)
125 e336e3d6 2018-11-05 stsp 			entry = RB_RIGHT(entry, entry);
126 984e8a45 2018-11-05 stsp 		else
127 984e8a45 2018-11-05 stsp 			break;
128 54be8251 2018-06-04 stsp 	}
129 54be8251 2018-06-04 stsp 
130 984e8a45 2018-11-05 stsp 	return entry;
131 54be8251 2018-06-04 stsp }
132 54be8251 2018-06-04 stsp 
133 984e8a45 2018-11-05 stsp void *
134 984e8a45 2018-11-05 stsp got_object_idset_get(struct got_object_idset *set, struct got_object_id *id)
135 984e8a45 2018-11-05 stsp {
136 984e8a45 2018-11-05 stsp 	struct got_object_idset_element *entry = find_element(set, id);
137 984e8a45 2018-11-05 stsp 	return entry ? entry->data : NULL;
138 984e8a45 2018-11-05 stsp }
139 984e8a45 2018-11-05 stsp 
140 54be8251 2018-06-04 stsp const struct got_error *
141 e7c810ea 2018-06-22 stsp got_object_idset_remove(void **data, struct got_object_idset *set,
142 54be8251 2018-06-04 stsp     struct got_object_id *id)
143 54be8251 2018-06-04 stsp {
144 984e8a45 2018-11-05 stsp 	struct got_object_idset_element *entry;
145 54be8251 2018-06-04 stsp 
146 441e144c 2018-06-22 stsp 	if (data)
147 441e144c 2018-06-22 stsp 		*data = NULL;
148 441e144c 2018-06-22 stsp 
149 984e8a45 2018-11-05 stsp 	if (set->totelem == 0)
150 c6f420bf 2018-06-04 stsp 		return got_error(GOT_ERR_NO_OBJ);
151 c6f420bf 2018-06-04 stsp 
152 f054b67a 2018-11-05 stsp 	if (id == NULL)
153 e336e3d6 2018-11-05 stsp 		entry = RB_ROOT(&set->entries);
154 f054b67a 2018-11-05 stsp 	else
155 f054b67a 2018-11-05 stsp 		entry = find_element(set, id);
156 984e8a45 2018-11-05 stsp 	if (entry == NULL)
157 984e8a45 2018-11-05 stsp 		return got_error(GOT_ERR_NO_OBJ);
158 54be8251 2018-06-04 stsp 
159 e336e3d6 2018-11-05 stsp 	RB_REMOVE(got_object_idset_tree, &set->entries, entry);
160 984e8a45 2018-11-05 stsp 	if (data)
161 984e8a45 2018-11-05 stsp 		*data = entry->data;
162 984e8a45 2018-11-05 stsp 	free(entry);
163 984e8a45 2018-11-05 stsp 	set->totelem--;
164 984e8a45 2018-11-05 stsp 	return NULL;
165 54be8251 2018-06-04 stsp }
166 54be8251 2018-06-04 stsp 
167 54be8251 2018-06-04 stsp int
168 54be8251 2018-06-04 stsp got_object_idset_contains(struct got_object_idset *set,
169 54be8251 2018-06-04 stsp     struct got_object_id *id)
170 54be8251 2018-06-04 stsp {
171 984e8a45 2018-11-05 stsp 	struct got_object_idset_element *entry = find_element(set, id);
172 984e8a45 2018-11-05 stsp 	return entry ? 1 : 0;
173 54be8251 2018-06-04 stsp }
174 54be8251 2018-06-04 stsp 
175 cb103d04 2018-11-07 stsp const struct got_error *
176 cb103d04 2018-11-07 stsp got_object_idset_for_each(struct got_object_idset *set,
177 cb103d04 2018-11-07 stsp     const struct got_error *(*cb)(struct got_object_id *, void *, void *),
178 cb103d04 2018-11-07 stsp     void *arg)
179 54be8251 2018-06-04 stsp {
180 cb103d04 2018-11-07 stsp 	const struct got_error *err;
181 9489f1f7 2018-11-11 stsp 	struct got_object_idset_element *entry, *tmp;
182 54be8251 2018-06-04 stsp 
183 9489f1f7 2018-11-11 stsp 	RB_FOREACH_SAFE(entry, got_object_idset_tree, &set->entries, tmp) {
184 cb103d04 2018-11-07 stsp 		err = (*cb)(&entry->id, entry->data, arg);
185 cb103d04 2018-11-07 stsp 		if (err)
186 cb103d04 2018-11-07 stsp 			return err;
187 cb103d04 2018-11-07 stsp 	}
188 cb103d04 2018-11-07 stsp 	return NULL;
189 54be8251 2018-06-04 stsp }
190 c6f420bf 2018-06-04 stsp 
191 069f84d5 2018-06-11 stsp int
192 c6f420bf 2018-06-04 stsp got_object_idset_num_elements(struct got_object_idset *set)
193 c6f420bf 2018-06-04 stsp {
194 2bd394ff 2018-06-22 stsp 	return set->totelem;
195 c6f420bf 2018-06-04 stsp }
196 984e8a45 2018-11-05 stsp 
197 e336e3d6 2018-11-05 stsp RB_GENERATE(got_object_idset_tree, got_object_idset_element, entry,
198 984e8a45 2018-11-05 stsp     cmp_elements);