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1 | /* |
2 | * Copyright 2003-2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (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 | |
8 | */ | |
9 | ||
10 | #define OSSL_FORCE_ERR_STATE | |
11 | ||
12 | #include <openssl/err.h> | |
13 | #include "err_local.h" | |
14 | ||
15 | int ERR_set_mark(void) | |
16 | { | |
17 | ERR_STATE *es; | |
18 | ||
19 | es = ossl_err_get_state_int(); | |
20 | if (es == NULL) | |
21 | return 0; | |
22 | ||
23 | if (es->bottom == es->top) | |
24 | return 0; | |
25 | es->err_marks[es->top]++; | |
26 | return 1; | |
27 | } | |
28 | ||
29 | int ERR_pop_to_mark(void) | |
30 | { | |
31 | ERR_STATE *es; | |
32 | ||
33 | es = ossl_err_get_state_int(); | |
34 | if (es == NULL) | |
35 | return 0; | |
36 | ||
37 | while (es->bottom != es->top | |
38 | && es->err_marks[es->top] == 0) { | |
39 | err_clear(es, es->top, 0); | |
40 | es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1; | |
41 | } | |
42 | ||
43 | if (es->bottom == es->top) | |
44 | return 0; | |
45 | es->err_marks[es->top]--; | |
46 | return 1; | |
47 | } | |
48 | ||
49 | int ERR_clear_last_mark(void) | |
50 | { | |
51 | ERR_STATE *es; | |
52 | int top; | |
53 | ||
54 | es = ossl_err_get_state_int(); | |
55 | if (es == NULL) | |
56 | return 0; | |
57 | ||
58 | top = es->top; | |
59 | while (es->bottom != top | |
60 | && es->err_marks[top] == 0) { | |
61 | top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1; | |
62 | } | |
63 | ||
64 | if (es->bottom == top) | |
65 | return 0; | |
66 | es->err_marks[top]--; | |
67 | return 1; | |
68 | } | |
69 |