xref: /openssl/crypto/err/err_mark.c (revision 5304d563) 
1 /*
2  * Copyright 2003-2023 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 
ERR_set_mark(void)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 
ERR_pop(void)29 int ERR_pop(void)
30 {
31     ERR_STATE *es;
32 
33     es = ossl_err_get_state_int();
34     if (es == NULL || es->bottom == es->top)
35         return 0;
36 
37     err_clear(es, es->top, 0);
38     es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
39     return 1;
40 }
41 
ERR_pop_to_mark(void)42 int ERR_pop_to_mark(void)
43 {
44     ERR_STATE *es;
45 
46     es = ossl_err_get_state_int();
47     if (es == NULL)
48         return 0;
49 
50     while (es->bottom != es->top
51            && es->err_marks[es->top] == 0) {
52         err_clear(es, es->top, 0);
53         es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
54     }
55 
56     if (es->bottom == es->top)
57         return 0;
58     es->err_marks[es->top]--;
59     return 1;
60 }
61 
ERR_count_to_mark(void)62 int ERR_count_to_mark(void)
63 {
64     ERR_STATE *es;
65     int count = 0, top;
66 
67     es = ossl_err_get_state_int();
68     if (es == NULL)
69         return 0;
70 
71     top = es->top;
72     while (es->bottom != top
73            && es->err_marks[top] == 0) {
74         ++count;
75         top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
76     }
77 
78     return count;
79 }
80 
ERR_clear_last_mark(void)81 int ERR_clear_last_mark(void)
82 {
83     ERR_STATE *es;
84     int top;
85 
86     es = ossl_err_get_state_int();
87     if (es == NULL)
88         return 0;
89 
90     top = es->top;
91     while (es->bottom != top
92            && es->err_marks[top] == 0) {
93         top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
94     }
95 
96     if (es->bottom == top)
97         return 0;
98     es->err_marks[top]--;
99     return 1;
100 }
101 
102