crypto/err/err_mark.c

   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