2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include "internal/numbers.h"
13 #include <openssl/stack.h>
14 #include <openssl/objects.h>
21 OPENSSL_sk_compfunc comp;
29 OPENSSL_sk_compfunc OPENSSL_sk_set_cmp_func(OPENSSL_STACK *sk, OPENSSL_sk_compfunc c)
31 OPENSSL_sk_compfunc old = sk->comp;
40 OPENSSL_STACK *OPENSSL_sk_dup(const OPENSSL_STACK *sk)
47 if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
50 /* direct structure assignment */
53 if ((ret->data = OPENSSL_malloc(sizeof(*ret->data) * sk->num_alloc)) == NULL)
55 memcpy(ret->data, sk->data, sizeof(char *) * sk->num);
62 OPENSSL_STACK *OPENSSL_sk_deep_copy(const OPENSSL_STACK *sk,
63 OPENSSL_sk_copyfunc copy_func,
64 OPENSSL_sk_freefunc free_func)
72 if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
75 /* direct structure assignment */
78 ret->num_alloc = sk->num > MIN_NODES ? (size_t)sk->num : MIN_NODES;
79 ret->data = OPENSSL_zalloc(sizeof(*ret->data) * ret->num_alloc);
80 if (ret->data == NULL) {
85 for (i = 0; i < ret->num; ++i) {
86 if (sk->data[i] == NULL)
88 if ((ret->data[i] = copy_func(sk->data[i])) == NULL) {
90 if (ret->data[i] != NULL)
91 free_func((void *)ret->data[i]);
99 OPENSSL_STACK *OPENSSL_sk_new_null(void)
101 return OPENSSL_sk_new((OPENSSL_sk_compfunc)NULL);
104 OPENSSL_STACK *OPENSSL_sk_new(OPENSSL_sk_compfunc c)
108 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
110 if ((ret->data = OPENSSL_zalloc(sizeof(*ret->data) * MIN_NODES)) == NULL)
113 ret->num_alloc = MIN_NODES;
121 int OPENSSL_sk_insert(OPENSSL_STACK *st, const void *data, int loc)
123 if (st == NULL || st->num < 0 || st->num == INT_MAX) {
127 if (st->num_alloc <= (size_t)(st->num + 1)) {
128 size_t doub_num_alloc = st->num_alloc * 2;
129 const char **tmpdata;
131 /* Overflow checks */
132 if (doub_num_alloc < st->num_alloc)
135 /* Avoid overflow due to multiplication by sizeof(char *) */
136 if (doub_num_alloc > SIZE_MAX / sizeof(char *))
139 tmpdata = OPENSSL_realloc((char *)st->data,
140 sizeof(char *) * doub_num_alloc);
145 st->num_alloc = doub_num_alloc;
147 if ((loc >= st->num) || (loc < 0)) {
148 st->data[st->num] = data;
150 memmove(&st->data[loc + 1], &st->data[loc],
151 sizeof(st->data[0]) * (st->num - loc));
152 st->data[loc] = data;
159 void *OPENSSL_sk_delete_ptr(OPENSSL_STACK *st, const void *p)
163 for (i = 0; i < st->num; i++)
164 if (st->data[i] == p)
165 return OPENSSL_sk_delete(st, i);
169 void *OPENSSL_sk_delete(OPENSSL_STACK *st, int loc)
173 if (st == NULL || loc < 0 || loc >= st->num)
177 if (loc != st->num - 1)
178 memmove(&st->data[loc], &st->data[loc + 1],
179 sizeof(st->data[0]) * (st->num - loc - 1));
184 static int internal_find(OPENSSL_STACK *st, const void *data,
193 if (st->comp == NULL) {
194 for (i = 0; i < st->num; i++)
195 if (st->data[i] == data)
202 r = OBJ_bsearch_ex_(&data, st->data, st->num, sizeof(void *), st->comp,
206 return (int)((const char **)r - st->data);
209 int OPENSSL_sk_find(OPENSSL_STACK *st, const void *data)
211 return internal_find(st, data, OBJ_BSEARCH_FIRST_VALUE_ON_MATCH);
214 int OPENSSL_sk_find_ex(OPENSSL_STACK *st, const void *data)
216 return internal_find(st, data, OBJ_BSEARCH_VALUE_ON_NOMATCH);
219 int OPENSSL_sk_push(OPENSSL_STACK *st, const void *data)
221 return (OPENSSL_sk_insert(st, data, st->num));
224 int OPENSSL_sk_unshift(OPENSSL_STACK *st, const void *data)
226 return (OPENSSL_sk_insert(st, data, 0));
229 void *OPENSSL_sk_shift(OPENSSL_STACK *st)
235 return (OPENSSL_sk_delete(st, 0));
238 void *OPENSSL_sk_pop(OPENSSL_STACK *st)
244 return (OPENSSL_sk_delete(st, st->num - 1));
247 void OPENSSL_sk_zero(OPENSSL_STACK *st)
253 memset(st->data, 0, sizeof(*st->data) * st->num);
257 void OPENSSL_sk_pop_free(OPENSSL_STACK *st, OPENSSL_sk_freefunc func)
263 for (i = 0; i < st->num; i++)
264 if (st->data[i] != NULL)
265 func((char *)st->data[i]);
269 void OPENSSL_sk_free(OPENSSL_STACK *st)
273 OPENSSL_free(st->data);
277 int OPENSSL_sk_num(const OPENSSL_STACK *st)
284 void *OPENSSL_sk_value(const OPENSSL_STACK *st, int i)
286 if (st == NULL || i < 0 || i >= st->num)
288 return (void *)st->data[i];
291 void *OPENSSL_sk_set(OPENSSL_STACK *st, int i, const void *data)
293 if (st == NULL || i < 0 || i >= st->num)
296 return (void *)st->data[i];
299 void OPENSSL_sk_sort(OPENSSL_STACK *st)
301 if (st && !st->sorted && st->comp != NULL) {
302 qsort(st->data, st->num, sizeof(char *), st->comp);
307 int OPENSSL_sk_is_sorted(const OPENSSL_STACK *st)