text: /*
   * Copyright (c) 2015 TRUSTONIC LIMITED
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * 3. Neither the name of the TRUSTONIC LIMITED nor the names of its
   *    contributors may be used to endorse or promote products derived from
   *    this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef __KM_UTIL_H__
  #define __KM_UTIL_H__
  
  #include <hardware/keymaster_defs.h>
  
  #define LOG_TAG "TlcTeeKeyMaster"
  #include "log.h"
  
  /**
   * Set \p ret to the return value of \p expr; if it is not \p KM_ERROR_OK then
   * log the error and go to \p end,
   */
  #define CHECK_RESULT_OK(expr) \
      do { \
          ret = (expr); \
          if (ret != KM_ERROR_OK) { \
              LOG_E("%s:%d: %s == %d", __func__, __LINE__, #expr, ret); \
              goto end; \
          } \
      } while (false)
  
  #define CHECK_TRUE(errcode, expr) \
      do { \
          if (!(expr)) { \
              LOG_E("%s:%d: '%s' is false\n", __func__, __LINE__, #expr); \
              ret = (errcode); \
              goto end; \
          } \
      } while (false)
  
  #define CHECK_NOT_NULL(expr) \
      CHECK_TRUE(KM_ERROR_UNEXPECTED_NULL_POINTER, (expr) != NULL)
  
  /**
   * Get value of enumerated tag from key parameters
   */
  keymaster_error_t get_enumerated_tag(
      const keymaster_key_param_set_t *params,
      keymaster_tag_t tag,
      uint32_t *value);
  
  /**
   * Get value of integer tag from key parameters
   */
  keymaster_error_t get_integer_tag(
      const keymaster_key_param_set_t *params,
      keymaster_tag_t tag,
      uint32_t *value);
  
  /**
   * Get value of long integer tag from key parameters
   */
  keymaster_error_t get_long_integer_tag(
      const keymaster_key_param_set_t *params,
      keymaster_tag_t tag,
      uint64_t *value);
  
  #endif /* __KM_UTIL_H__ */
  