text: /*
   * coreHTTP v2.0.1
   * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  /**
   * @file strncpy.c
   * @brief Creates a stub for strncpy so that the proofs for HTTPClient_AddHeader,
   * HTTPClient_AddRangeHeader, and HTTPClient_InitializeRequestHeaders, run much
   * faster. This stub checks if, for the input copy length, the destination and
   * source are valid accessible memory.
   */
  
  #include <string.h>
  
  /* This is a clang macro not available on linux */
  #ifndef __has_builtin
      #define __has_builtin( x )    0
  #endif
  
  #if __has_builtin( __builtin___strncpy_chk )
      void * __builtin___strncpy_chk( void * dest,
                                      const void * src,
                                      size_t n,
                                      size_t os )
      {
          __CPROVER_assert( __CPROVER_w_ok( dest, n ), "write" );
          __CPROVER_assert( __CPROVER_r_ok( src, n ), "read" );
          return dest;
      }
  #else
      void * strncpy( void * dest,
                      const void * src,
                      size_t n )
      {
          __CPROVER_assert( __CPROVER_w_ok( dest, n ), "write" );
          __CPROVER_assert( __CPROVER_r_ok( src, n ), "read" );
          return dest;
      }
  #endif /* if __has_builtin( __builtin___strncpy_chk ) */
  