crypto/err/err_mark.c

   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
  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(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
  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
  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
  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