| 1 | /*
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| 2 | * Copyright 2003-2023 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #define OSSL_FORCE_ERR_STATE
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| 11 |
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| 12 | #include <openssl/err.h>
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| 13 | #include "err_local.h"
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| 14 |
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| 15 | int ERR_set_mark(void)
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| 16 | {
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| 17 | ERR_STATE *es;
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| 18 |
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| 19 | es = ossl_err_get_state_int();
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| 20 | if (es == NULL)
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| 21 | return 0;
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| 22 |
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| 23 | if (es->bottom == es->top)
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| 24 | return 0;
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| 25 | es->err_marks[es->top]++;
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| 26 | return 1;
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| 27 | }
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| 28 |
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| 29 | int ERR_pop(void)
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| 30 | {
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| 31 | ERR_STATE *es;
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| 32 |
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| 33 | es = ossl_err_get_state_int();
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| 34 | if (es == NULL || es->bottom == es->top)
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| 35 | return 0;
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| 36 |
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| 37 | err_clear(es, es->top, 0);
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| 38 | es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
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| 39 | return 1;
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| 40 | }
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| 41 |
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| 42 | int ERR_pop_to_mark(void)
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| 43 | {
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| 44 | ERR_STATE *es;
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| 45 |
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| 46 | es = ossl_err_get_state_int();
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| 47 | if (es == NULL)
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| 48 | return 0;
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| 49 |
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| 50 | while (es->bottom != es->top
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| 51 | && es->err_marks[es->top] == 0) {
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| 52 | err_clear(es, es->top, 0);
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| 53 | es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
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| 54 | }
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| 55 |
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| 56 | if (es->bottom == es->top)
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| 57 | return 0;
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| 58 | es->err_marks[es->top]--;
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| 59 | return 1;
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| 60 | }
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| 61 |
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| 62 | int ERR_count_to_mark(void)
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| 63 | {
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| 64 | ERR_STATE *es;
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| 65 | int count = 0, top;
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| 66 |
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| 67 | es = ossl_err_get_state_int();
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| 68 | if (es == NULL)
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| 69 | return 0;
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| 70 |
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| 71 | top = es->top;
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| 72 | while (es->bottom != top
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| 73 | && es->err_marks[top] == 0) {
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| 74 | ++count;
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| 75 | top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
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| 76 | }
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| 77 |
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| 78 | return count;
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| 79 | }
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| 80 |
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| 81 | int ERR_clear_last_mark(void)
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| 82 | {
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| 83 | ERR_STATE *es;
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| 84 | int top;
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| 85 |
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| 86 | es = ossl_err_get_state_int();
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| 87 | if (es == NULL)
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| 88 | return 0;
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| 89 |
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| 90 | top = es->top;
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| 91 | while (es->bottom != top
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| 92 | && es->err_marks[top] == 0) {
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| 93 | top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
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| 94 | }
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| 95 |
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| 96 | if (es->bottom == top)
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| 97 | return 0;
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| 98 | es->err_marks[top]--;
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| 99 | return 1;
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| 100 | }
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| 101 |
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