text: /**
   * \file debug.h
   *
   * \brief Functions for controlling and providing debug output from the library.
   *
   *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   *  SPDX-License-Identifier: Apache-2.0
   *
   *  Licensed under the Apache License, Version 2.0 (the "License"); you may
   *  not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *  This file is part of mbed TLS (https://tls.mbed.org)
   */
  #ifndef MBEDTLS_DEBUG_H
  #define MBEDTLS_DEBUG_H
  
  #if !defined(MBEDTLS_CONFIG_FILE)
  #include "config.h"
  #else
  #include MBEDTLS_CONFIG_FILE
  #endif
  
  #include "ssl.h"
  
  #if defined(MBEDTLS_ECP_C)
  #include "ecp.h"
  #endif
  
  #if defined(MBEDTLS_DEBUG_C)
  
  #define MBEDTLS_DEBUG_STRIP_PARENS( ... )   __VA_ARGS__
  
  #define MBEDTLS_SSL_DEBUG_MSG( level, args )                    \
      mbedtls_debug_print_msg( ssl, level, "file1", __LINE__,    \
                               MBEDTLS_DEBUG_STRIP_PARENS args )
  
  #define MBEDTLS_SSL_DEBUG_RET( level, text, ret )                \
      mbedtls_debug_print_ret( ssl, level, "file1", __LINE__, text, ret )
  
  #define MBEDTLS_SSL_DEBUG_BUF( level, text, buf, len )           \
      mbedtls_debug_print_buf( ssl, level, "file1", __LINE__, text, buf, len )
  
  #if defined(MBEDTLS_BIGNUM_C)
  #define MBEDTLS_SSL_DEBUG_MPI( level, text, X )                  \
      mbedtls_debug_print_mpi( ssl, level, "file1", __LINE__, text, X )
  #endif
  
  #if defined(MBEDTLS_ECP_C)
  #define MBEDTLS_SSL_DEBUG_ECP( level, text, X )                  \
      mbedtls_debug_print_ecp( ssl, level, "file1", __LINE__, text, X )
  #endif
  
  #if defined(MBEDTLS_X509_CRT_PARSE_C)
  #define MBEDTLS_SSL_DEBUG_CRT( level, text, crt )                \
      mbedtls_debug_print_crt( ssl, level, "file1", __LINE__, text, crt )
  #endif
  
  #define MBEDTLS_DEBUG_BUF( level, text, buf, len )                \
      mbedtls_debug_print_buf( ssl, level, "file1", __LINE__, text, buf, len )
  
  #define MBEDTLS_ALT_DEBUG_BUF( level, text, buf, len )           \
      mbedtls_debug_print_data(level, "file1", __LINE__, text, buf, len )
  #else /* MBEDTLS_DEBUG_C */
  
  #define MBEDTLS_SSL_DEBUG_MSG( level, args )            do { } while( 0 )
  #define MBEDTLS_SSL_DEBUG_RET( level, text, ret )       do { } while( 0 )
  #define MBEDTLS_SSL_DEBUG_BUF( level, text, buf, len )  do { } while( 0 )
  #define MBEDTLS_SSL_DEBUG_MPI( level, text, X )         do { } while( 0 )
  #define MBEDTLS_SSL_DEBUG_ECP( level, text, X )         do { } while( 0 )
  #define MBEDTLS_SSL_DEBUG_CRT( level, text, crt )       do { } while( 0 )
  #define MBEDTLS_ALT_DEBUG_BUF( level, text, buf, len )  do { } while( 0 )
  
  #endif /* MBEDTLS_DEBUG_C */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * \brief   Set the threshold error level to handle globally all debug output.
   *          Debug messages that have a level over the threshold value are
   *          discarded.
   *          (Default value: 0 = No debug )
   *
   * \param threshold     theshold level of messages to filter on. Messages at a
   *                      higher level will be discarded.
   *                          - Debug levels
   *                              - 0 No debug
   *                              - 1 Error
   *                              - 2 State change
   *                              - 3 Informational
   *                              - 4 Verbose
   */
  void mbedtls_debug_set_threshold( int threshold );
  
  /**
   * \brief    Print a message to the debug output. This function is always used
   *          through the MBEDTLS_SSL_DEBUG_MSG() macro, which supplies the ssl
   *          context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the message has occurred in
   * \param line      line number the message has occurred at
   * \param format    format specifier, in printf format
   * \param ...       variables used by the format specifier
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_msg( const mbedtls_ssl_context *ssl, int level,
                                const char *file, int line,
                                const char *format, ... );
  
  /**
   * \brief   Print the return value of a function to the debug output. This
   *          function is always used through the MBEDTLS_SSL_DEBUG_RET() macro,
   *          which supplies the ssl context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the error has occurred in
   * \param line      line number the error has occurred in
   * \param text      the name of the function that returned the error
   * \param ret       the return code value
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_ret( const mbedtls_ssl_context *ssl, int level,
                        const char *file, int line,
                        const char *text, int ret );
  
  /**
   * \brief   Output a buffer of size len bytes to the debug output. This function
   *          is always used through the MBEDTLS_SSL_DEBUG_BUF() macro,
   *          which supplies the ssl context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the error has occurred in
   * \param line      line number the error has occurred in
   * \param text      a name or label for the buffer being dumped. Normally the
   *                  variable or buffer name
   * \param buf       the buffer to be outputted
   * \param len       length of the buffer
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_buf( const mbedtls_ssl_context *ssl, int level,
                        const char *file, int line, const char *text,
                        const unsigned char *buf, size_t len );
  
  #if defined(MBEDTLS_BIGNUM_C)
  /**
   * \brief   Print a MPI variable to the debug output. This function is always
   *          used through the MBEDTLS_SSL_DEBUG_MPI() macro, which supplies the
   *          ssl context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the error has occurred in
   * \param line      line number the error has occurred in
   * \param text      a name or label for the MPI being output. Normally the
   *                  variable name
   * \param X         the MPI variable
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_mpi( const mbedtls_ssl_context *ssl, int level,
                        const char *file, int line,
                        const char *text, const mbedtls_mpi *X );
  #endif
  
  #if defined(MBEDTLS_ECP_C)
  /**
   * \brief   Print an ECP point to the debug output. This function is always
   *          used through the MBEDTLS_SSL_DEBUG_ECP() macro, which supplies the
   *          ssl context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the error has occurred in
   * \param line      line number the error has occurred in
   * \param text      a name or label for the ECP point being output. Normally the
   *                  variable name
   * \param X         the ECP point
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_ecp( const mbedtls_ssl_context *ssl, int level,
                        const char *file, int line,
                        const char *text, const mbedtls_ecp_point *X );
  #endif
  
  #if defined(MBEDTLS_X509_CRT_PARSE_C)
  /**
   * \brief   Print a X.509 certificate structure to the debug output. This
   *          function is always used through the MBEDTLS_SSL_DEBUG_CRT() macro,
   *          which supplies the ssl context, file and line number parameters.
   *
   * \param ssl       SSL context
   * \param level     error level of the debug message
   * \param file      file the error has occurred in
   * \param line      line number the error has occurred in
   * \param text      a name or label for the certificate being output
   * \param crt       X.509 certificate structure
   *
   * \attention       This function is intended for INTERNAL usage within the
   *                  library only.
   */
  void mbedtls_debug_print_crt( const mbedtls_ssl_context *ssl, int level,
                        const char *file, int line,
                        const char *text, const mbedtls_x509_crt *crt );
  
  void mbedtls_debug_print_data(int level,
                  const char *file, int line,
                  const char *name, const unsigned char *data, int len);
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* debug.h */
  
  