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 <openssl/stack.h>
13 #include <openssl/objects.h>
20 OPENSSL_sk_compfunc comp;
28 OPENSSL_sk_compfunc OPENSSL_sk_set_cmp_func(OPENSSL_STACK *sk, OPENSSL_sk_compfunc c)
30 OPENSSL_sk_compfunc old = sk->comp;
39 OPENSSL_STACK *OPENSSL_sk_dup(OPENSSL_STACK *sk)
44 if ((ret = OPENSSL_sk_new(sk->comp)) == NULL)
46 s = OPENSSL_realloc((char *)ret->data,
47 (unsigned int)sizeof(char *) * sk->num_alloc);
53 memcpy(ret->data, sk->data, sizeof(char *) * sk->num);
54 ret->sorted = sk->sorted;
55 ret->num_alloc = sk->num_alloc;
63 OPENSSL_STACK *OPENSSL_sk_deep_copy(OPENSSL_STACK *sk, OPENSSL_sk_copyfunc copy_func,
64 OPENSSL_sk_freefunc free_func)
69 if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
72 ret->sorted = sk->sorted;
74 ret->num_alloc = sk->num > MIN_NODES ? sk->num : MIN_NODES;
75 ret->data = OPENSSL_malloc(sizeof(*ret->data) * ret->num_alloc);
76 if (ret->data == NULL) {
80 for (i = 0; i < ret->num_alloc; i++)
83 for (i = 0; i < ret->num; ++i) {
84 if (sk->data[i] == NULL)
86 if ((ret->data[i] = copy_func(sk->data[i])) == NULL) {
88 if (ret->data[i] != NULL)
89 free_func(ret->data[i]);
97 OPENSSL_STACK *OPENSSL_sk_new_null(void)
99 return OPENSSL_sk_new((OPENSSL_sk_compfunc)NULL);
102 OPENSSL_STACK *OPENSSL_sk_new(OPENSSL_sk_compfunc c)
106 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
108 if ((ret->data = OPENSSL_zalloc(sizeof(*ret->data) * MIN_NODES)) == NULL)
111 ret->num_alloc = MIN_NODES;
119 int OPENSSL_sk_insert(OPENSSL_STACK *st, void *data, int loc)
125 if (st->num_alloc <= st->num + 1) {
126 s = OPENSSL_realloc((char *)st->data,
127 (unsigned int)sizeof(char *) * st->num_alloc * 2);
133 if ((loc >= (int)st->num) || (loc < 0))
134 st->data[st->num] = data;
136 memmove(&(st->data[loc + 1]),
137 &(st->data[loc]), sizeof(char *) * (st->num - loc));
138 st->data[loc] = data;
145 void *OPENSSL_sk_delete_ptr(OPENSSL_STACK *st, const void *p)
149 for (i = 0; i < st->num; i++)
150 if (st->data[i] == p)
151 return OPENSSL_sk_delete(st, i);
155 void *OPENSSL_sk_delete(OPENSSL_STACK *st, int loc)
160 if (st == NULL || loc < 0 || loc >= st->num)
164 if (loc != st->num - 1) {
166 for (i = loc; i < j; i++)
167 st->data[i] = st->data[i + 1];
169 * In theory memcpy is not safe for this memcpy( &(st->data[loc]),
170 * &(st->data[loc+1]), sizeof(char *)*(st->num-loc-1));
177 static int internal_find(OPENSSL_STACK *st, const void *data,
180 const void *const *r;
186 if (st->comp == NULL) {
187 for (i = 0; i < st->num; i++)
188 if (st->data[i] == data)
195 r = OBJ_bsearch_ex_(&data, st->data, st->num, sizeof(void *), st->comp,
199 return (int)((char **)r - st->data);
202 int OPENSSL_sk_find(OPENSSL_STACK *st, const void *data)
204 return internal_find(st, data, OBJ_BSEARCH_FIRST_VALUE_ON_MATCH);
207 int OPENSSL_sk_find_ex(OPENSSL_STACK *st, const void *data)
209 return internal_find(st, data, OBJ_BSEARCH_VALUE_ON_NOMATCH);
212 int OPENSSL_sk_push(OPENSSL_STACK *st, void *data)
214 return (OPENSSL_sk_insert(st, data, st->num));
217 int OPENSSL_sk_unshift(OPENSSL_STACK *st, void *data)
219 return (OPENSSL_sk_insert(st, data, 0));
222 void *OPENSSL_sk_shift(OPENSSL_STACK *st)
228 return (OPENSSL_sk_delete(st, 0));
231 void *OPENSSL_sk_pop(OPENSSL_STACK *st)
237 return (OPENSSL_sk_delete(st, st->num - 1));
240 void OPENSSL_sk_zero(OPENSSL_STACK *st)
246 memset(st->data, 0, sizeof(*st->data) * st->num);
250 void OPENSSL_sk_pop_free(OPENSSL_STACK *st, OPENSSL_sk_freefunc func)
256 for (i = 0; i < st->num; i++)
257 if (st->data[i] != NULL)
262 void OPENSSL_sk_free(OPENSSL_STACK *st)
266 OPENSSL_free(st->data);
270 int OPENSSL_sk_num(const OPENSSL_STACK *st)
277 void *OPENSSL_sk_value(const OPENSSL_STACK *st, int i)
279 if (st == NULL || i < 0 || i >= st->num)
284 void *OPENSSL_sk_set(OPENSSL_STACK *st, int i, void *value)
286 if (st == NULL || i < 0 || i >= st->num)
288 return (st->data[i] = value);
291 void OPENSSL_sk_sort(OPENSSL_STACK *st)
293 if (st && !st->sorted && st->comp != NULL) {
294 qsort(st->data, st->num, sizeof(char *), st->comp);
299 int OPENSSL_sk_is_sorted(const OPENSSL_STACK *st)