1 /* crypto/stack/stack.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
60 #include <openssl/stack.h>
61 #include <openssl/objects.h>
68 int (*comp) (const void *, const void *);
74 const char STACK_version[] = "Stack" OPENSSL_VERSION_PTEXT;
78 int (*sk_set_cmp_func(_STACK *sk, int (*c) (const void *, const void *)))
79 (const void *, const void *) {
80 int (*old) (const void *, const void *) = sk->comp;
89 _STACK *sk_dup(_STACK *sk)
94 if ((ret = sk_new(sk->comp)) == NULL)
96 s = (char **)OPENSSL_realloc((char *)ret->data,
97 (unsigned int)sizeof(char *) *
104 memcpy(ret->data, sk->data, sizeof(char *) * sk->num);
105 ret->sorted = sk->sorted;
106 ret->num_alloc = sk->num_alloc;
107 ret->comp = sk->comp;
115 _STACK *sk_deep_copy(_STACK *sk, void *(*copy_func) (void *),
116 void (*free_func) (void *))
121 if ((ret = OPENSSL_malloc(sizeof(_STACK))) == NULL)
123 ret->comp = sk->comp;
124 ret->sorted = sk->sorted;
126 ret->num_alloc = sk->num > MIN_NODES ? sk->num : MIN_NODES;
127 ret->data = OPENSSL_malloc(sizeof(char *) * ret->num_alloc);
128 if (ret->data == NULL) {
132 for (i = 0; i < ret->num_alloc; i++)
135 for (i = 0; i < ret->num; ++i) {
136 if (sk->data[i] == NULL)
138 if ((ret->data[i] = copy_func(sk->data[i])) == NULL) {
140 if (ret->data[i] != NULL)
141 free_func(ret->data[i]);
149 _STACK *sk_new_null(void)
151 return sk_new((int (*)(const void *, const void *))0);
154 _STACK *sk_new(int (*c) (const void *, const void *))
159 if ((ret = OPENSSL_malloc(sizeof(_STACK))) == NULL)
161 if ((ret->data = OPENSSL_malloc(sizeof(char *) * MIN_NODES)) == NULL)
163 for (i = 0; i < MIN_NODES; i++)
166 ret->num_alloc = MIN_NODES;
176 int sk_insert(_STACK *st, void *data, int loc)
182 if (st->num_alloc <= st->num + 1) {
183 s = OPENSSL_realloc((char *)st->data,
184 (unsigned int)sizeof(char *) * st->num_alloc * 2);
190 if ((loc >= (int)st->num) || (loc < 0))
191 st->data[st->num] = data;
193 memmove(&(st->data[loc + 1]),
194 &(st->data[loc]), sizeof(char *) * (st->num - loc));
195 st->data[loc] = data;
202 void *sk_delete_ptr(_STACK *st, void *p)
206 for (i = 0; i < st->num; i++)
207 if (st->data[i] == p)
208 return (sk_delete(st, i));
212 void *sk_delete(_STACK *st, int loc)
217 if (!st || (loc < 0) || (loc >= st->num))
221 if (loc != st->num - 1) {
223 for (i = loc; i < j; i++)
224 st->data[i] = st->data[i + 1];
226 * In theory memcpy is not safe for this memcpy( &(st->data[loc]),
227 * &(st->data[loc+1]), sizeof(char *)*(st->num-loc-1));
234 static int internal_find(_STACK *st, void *data, int ret_val_options)
236 const void *const *r;
242 if (st->comp == NULL) {
243 for (i = 0; i < st->num; i++)
244 if (st->data[i] == data)
251 r = OBJ_bsearch_ex_(&data, st->data, st->num, sizeof(void *), st->comp,
255 return (int)((char **)r - st->data);
258 int sk_find(_STACK *st, void *data)
260 return internal_find(st, data, OBJ_BSEARCH_FIRST_VALUE_ON_MATCH);
263 int sk_find_ex(_STACK *st, void *data)
265 return internal_find(st, data, OBJ_BSEARCH_VALUE_ON_NOMATCH);
268 int sk_push(_STACK *st, void *data)
270 return (sk_insert(st, data, st->num));
273 int sk_unshift(_STACK *st, void *data)
275 return (sk_insert(st, data, 0));
278 void *sk_shift(_STACK *st)
284 return (sk_delete(st, 0));
287 void *sk_pop(_STACK *st)
293 return (sk_delete(st, st->num - 1));
296 void sk_zero(_STACK *st)
302 memset((char *)st->data, 0, sizeof(*st->data) * st->num);
306 void sk_pop_free(_STACK *st, void (*func) (void *))
312 for (i = 0; i < st->num; i++)
313 if (st->data[i] != NULL)
318 void sk_free(_STACK *st)
322 if (st->data != NULL)
323 OPENSSL_free(st->data);
327 int sk_num(const _STACK *st)
334 void *sk_value(const _STACK *st, int i)
336 if (!st || (i < 0) || (i >= st->num))
341 void *sk_set(_STACK *st, int i, void *value)
343 if (!st || (i < 0) || (i >= st->num))
345 return (st->data[i] = value);
348 void sk_sort(_STACK *st)
350 if (st && !st->sorted) {
351 int (*comp_func) (const void *, const void *);
354 * same comment as in sk_find ... previously st->comp was declared as
355 * a (void*,void*) callback type, but this made the population of the
356 * callback pointer illogical - our callbacks compare type** with
357 * type**, so we leave the casting until absolutely necessary (ie.
360 comp_func = (int (*)(const void *, const void *))(st->comp);
361 qsort(st->data, st->num, sizeof(char *), comp_func);
366 int sk_is_sorted(const _STACK *st)