1/* sframe-error.c - Error messages. 2 3 Copyright (C) 2022 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 32static const char *const _sframe_errlist[] = { 33#define _SFRAME_ITEM(n, s) s, 34_SFRAME_ERRORS 35#undef _SFRAME_ITEM 36}; 37 38const char * 39sframe_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} 50