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authorcvs2svn <admin@example.com>2014-08-08 05:06:58 +0000
committercvs2svn <admin@example.com>2014-08-08 05:06:58 +0000
commit9033820a64c84908dee3f9261ad212f6b6c3449a (patch)
tree7e0238ed56b7c32d864cb6ed15fda74066bd9d06 /src/lib/libcrypto/stack/stack.c
parentd4e460a24e2f9d4fe391e756145c2fdf4de7b218 (diff)
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This commit was manufactured by cvs2git to create branch 'OPENBSD_5_6'.
Diffstat (limited to 'src/lib/libcrypto/stack/stack.c')
-rw-r--r--src/lib/libcrypto/stack/stack.c351
1 files changed, 0 insertions, 351 deletions
diff --git a/src/lib/libcrypto/stack/stack.c b/src/lib/libcrypto/stack/stack.c
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1/* $OpenBSD: stack.c,v 1.18 2014/07/11 08:44:49 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59/* Code for stacks
60 * Author - Eric Young v 1.0
61 * 1.2 eay 12-Mar-97 - Modified sk_find so that it _DOES_ return the
62 * lowest index for the searched item.
63 *
64 * 1.1 eay - Take from netdb and added to SSLeay
65 *
66 * 1.0 eay - First version 29/07/92
67 */
68
69#include <stdio.h>
70#include <string.h>
71
72#include <openssl/objects.h>
73#include <openssl/stack.h>
74
75#undef MIN_NODES
76#define MIN_NODES 4
77
78#include <errno.h>
79
80int
81(*sk_set_cmp_func(_STACK *sk, int (*c)(const void *, const void *)))(
82 const void *, const void *)
83{
84 int (*old)(const void *, const void *) = sk->comp;
85
86 if (sk->comp != c)
87 sk->sorted = 0;
88 sk->comp = c;
89
90 return old;
91}
92
93_STACK *
94sk_dup(_STACK *sk)
95{
96 _STACK *ret;
97 char **s;
98
99 if ((ret = sk_new(sk->comp)) == NULL)
100 goto err;
101 s = reallocarray(ret->data, sk->num_alloc, sizeof(char *));
102 if (s == NULL)
103 goto err;
104 ret->data = s;
105
106 ret->num = sk->num;
107 memcpy(ret->data, sk->data, sizeof(char *) * sk->num);
108 ret->sorted = sk->sorted;
109 ret->num_alloc = sk->num_alloc;
110 ret->comp = sk->comp;
111 return (ret);
112
113err:
114 if (ret)
115 sk_free(ret);
116 return (NULL);
117}
118
119_STACK *
120sk_new_null(void)
121{
122 return sk_new((int (*)(const void *, const void *))0);
123}
124
125_STACK *
126sk_new(int (*c)(const void *, const void *))
127{
128 _STACK *ret;
129 int i;
130
131 if ((ret = malloc(sizeof(_STACK))) == NULL)
132 goto err;
133 if ((ret->data = reallocarray(NULL, MIN_NODES, sizeof(char *))) == NULL)
134 goto err;
135 for (i = 0; i < MIN_NODES; i++)
136 ret->data[i] = NULL;
137 ret->comp = c;
138 ret->num_alloc = MIN_NODES;
139 ret->num = 0;
140 ret->sorted = 0;
141 return (ret);
142
143err:
144 free(ret);
145 return (NULL);
146}
147
148int
149sk_insert(_STACK *st, void *data, int loc)
150{
151 char **s;
152
153 if (st == NULL)
154 return 0;
155 if (st->num_alloc <= st->num + 1) {
156 s = reallocarray(st->data, st->num_alloc, 2 * sizeof(char *));
157 if (s == NULL)
158 return (0);
159 st->data = s;
160 st->num_alloc *= 2;
161 }
162 if ((loc >= (int)st->num) || (loc < 0))
163 st->data[st->num] = data;
164 else {
165 memmove(&(st->data[loc + 1]), &(st->data[loc]),
166 sizeof(char *)*(st->num - loc));
167 st->data[loc] = data;
168 }
169 st->num++;
170 st->sorted = 0;
171 return (st->num);
172}
173
174void *
175sk_delete_ptr(_STACK *st, void *p)
176{
177 int i;
178
179 for (i = 0; i < st->num; i++)
180 if (st->data[i] == p)
181 return (sk_delete(st, i));
182 return (NULL);
183}
184
185void *
186sk_delete(_STACK *st, int loc)
187{
188 char *ret;
189
190 if (!st || (loc < 0) || (loc >= st->num))
191 return NULL;
192
193 ret = st->data[loc];
194 if (loc != st->num - 1) {
195 memmove(&(st->data[loc]), &(st->data[loc + 1]),
196 sizeof(char *)*(st->num - 1 - loc));
197 }
198 st->num--;
199 return (ret);
200}
201
202static int
203internal_find(_STACK *st, void *data, int ret_val_options)
204{
205 const void * const *r;
206 int i;
207
208 if (st == NULL)
209 return -1;
210
211 if (st->comp == NULL) {
212 for (i = 0; i < st->num; i++)
213 if (st->data[i] == data)
214 return (i);
215 return (-1);
216 }
217 sk_sort(st);
218 if (data == NULL)
219 return (-1);
220 r = OBJ_bsearch_ex_(&data, st->data, st->num, sizeof(void *), st->comp,
221 ret_val_options);
222 if (r == NULL)
223 return (-1);
224 return (int)((char **)r - st->data);
225}
226
227int
228sk_find(_STACK *st, void *data)
229{
230 return internal_find(st, data, OBJ_BSEARCH_FIRST_VALUE_ON_MATCH);
231}
232
233int
234sk_find_ex(_STACK *st, void *data)
235{
236 return internal_find(st, data, OBJ_BSEARCH_VALUE_ON_NOMATCH);
237}
238
239int
240sk_push(_STACK *st, void *data)
241{
242 return (sk_insert(st, data, st->num));
243}
244
245int
246sk_unshift(_STACK *st, void *data)
247{
248 return (sk_insert(st, data, 0));
249}
250
251void *
252sk_shift(_STACK *st)
253{
254 if (st == NULL)
255 return (NULL);
256 if (st->num <= 0)
257 return (NULL);
258 return (sk_delete(st, 0));
259}
260
261void *
262sk_pop(_STACK *st)
263{
264 if (st == NULL)
265 return (NULL);
266 if (st->num <= 0)
267 return (NULL);
268 return (sk_delete(st, st->num - 1));
269}
270
271void
272sk_zero(_STACK *st)
273{
274 if (st == NULL)
275 return;
276 if (st->num <= 0)
277 return;
278 memset(st->data, 0, sizeof(st->data)*st->num);
279 st->num = 0;
280}
281
282void
283sk_pop_free(_STACK *st, void (*func)(void *))
284{
285 int i;
286
287 if (st == NULL)
288 return;
289 for (i = 0; i < st->num; i++)
290 if (st->data[i] != NULL)
291 func(st->data[i]);
292 sk_free(st);
293}
294
295void
296sk_free(_STACK *st)
297{
298 if (st == NULL)
299 return;
300 free(st->data);
301 free(st);
302}
303
304int
305sk_num(const _STACK *st)
306{
307 if (st == NULL)
308 return -1;
309 return st->num;
310}
311
312void *
313sk_value(const _STACK *st, int i)
314{
315 if (!st || (i < 0) || (i >= st->num))
316 return NULL;
317 return st->data[i];
318}
319
320void *
321sk_set(_STACK *st, int i, void *value)
322{
323 if (!st || (i < 0) || (i >= st->num))
324 return NULL;
325 return (st->data[i] = value);
326}
327
328void
329sk_sort(_STACK *st)
330{
331 if (st && !st->sorted) {
332 int (*comp_func)(const void *, const void *);
333
334 /* same comment as in sk_find ... previously st->comp was declared
335 * as a (void*,void*) callback type, but this made the population
336 * of the callback pointer illogical - our callbacks compare
337 * type** with type**, so we leave the casting until absolutely
338 * necessary (ie. "now"). */
339 comp_func = (int (*)(const void *, const void *))(st->comp);
340 qsort(st->data, st->num, sizeof(char *), comp_func);
341 st->sorted = 1;
342 }
343}
344
345int
346sk_is_sorted(const _STACK *st)
347{
348 if (!st)
349 return 1;
350 return st->sorted;
351}