(gcrypt.info.gz) Error Strings

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 3.3.4 Error Strings
 -------------------
 
  -- Function: const char * gcry_strerror (gcry_error_t ERR)
      The function `gcry_strerror' returns a pointer to a statically
      allocated string containing a description of the error code
      contained in the error value ERR.  This string can be used to
      output a diagnostic message to the user.
 
  -- Function: const char * gcry_strsource (gcry_error_t ERR)
      The function `gcry_strerror' returns a pointer to a statically
      allocated string containing a description of the error source
      contained in the error value ERR.  This string can be used to
      output a diagnostic message to the user.
 
    The following example illustrates the use of the functions described
 above:
 
      {
        gcry_cipher_hd_t handle;
        gcry_error_t err = 0;
 
        err = gcry_cipher_open (&handle, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_CBC, 0);
        if (err)
          {
            fprintf (stderr, "Failure: %s/%s\n",
                     gcry_strsource (err),
                     gcry_strerror (err));
          }
      }
 

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