1  /* sframe-error.c - Error messages.
       2  
       3     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       4  
       5     This file is part of libsframe.
       6  
       7     This program is free software; you can redistribute it and/or modify
       8     it under the terms of the GNU General Public License as published by
       9     the Free Software Foundation; either version 3 of the License, or
      10     (at your option) any later version.
      11  
      12     This program is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15     GNU General Public License for more details.
      16  
      17     You should have received a copy of the GNU General Public License
      18     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      19  
      20  #include "sframe-api.h"
      21  #include <stddef.h>
      22  #include <string.h>
      23  
      24  /* In this file, we want to treat the first item of the SFrame error
      25     macro like subsequent items.  */
      26  #define _SFRAME_FIRST(NAME, VALUE) _SFRAME_ITEM(NAME, VALUE)
      27  
      28  /* The error message strings, each in a unique structure member precisely big
      29     enough for that error, plus a str member to access them all as a string
      30     table.  */
      31  
      32  static const char *const _sframe_errlist[] = {
      33  #define _SFRAME_ITEM(n, s) s,
      34  _SFRAME_ERRORS
      35  #undef _SFRAME_ITEM
      36  };
      37  
      38  const char *
      39  sframe_errmsg (int error)
      40  {
      41    const char *str;
      42  
      43    if (error >= SFRAME_ERR_BASE && (error - SFRAME_ERR_BASE) < SFRAME_ERR_NERR)
      44      str = _sframe_errlist[error - SFRAME_ERR_BASE];
      45    else
      46      str = (const char *) strerror (error);
      47  
      48    return (str ? str : "Unknown error");
      49  }