WINGs/error.c

   1 /*
   2  *  Window Maker miscelaneous function library
   3  *
   4  *  Copyright (c) 1997-2003 Alfredo K. Kojima
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include "wconfig.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <errno.h>
  28
  29 #include <WUtil.h>
  30
  31 extern char *_WINGS_progname;
  32
  33 #define MAXLINE 1024
  34
  35 /*********************************************************************
  36  * Returns the system error message associated with error code 'errnum'
  37  *********************************************************************/
  38 char *wstrerror(int errnum)
  39 {
  40 #if defined(HAVE_STRERROR)
  41         return strerror(errnum);
  42 #elif !defined(HAVE_STRERROR) && defined(BSD)
  43         extern int errno, sys_nerr;
  44 #  ifndef __DECC
  45         extern char *sys_errlist[];
  46 #  endif
  47         static char buf[] = "Unknown error 12345678901234567890";
  48
  49         if (errno < sys_nerr)
  50                 return sys_errlist[errnum];
  51
  52         snprintf(buf, sizeof(buf), _("Unknown error %d"), errnum);
  53         return buf;
  54 #else                           /* no strerror() and no sys_errlist[] */
  55         static char buf[] = "Error 12345678901234567890";
  56
  57         snprintf(buf, sizeof(buf), _("Error %d"), errnum);
  58         return buf;
  59 #endif
  60 }
  61
  62 void __wmessage(int type, void *extra, const char *msg, ...)
  63 {
  64         va_list args;
  65         char buf[MAXLINE];
  66
  67         fflush(stdout);
  68         /* message format: <wings_progname>: <qualifier>: <message>[: <extra info>]"\n" */
  69         snprintf(buf, sizeof(buf), "%s: ", _WINGS_progname ? _WINGS_progname : "WINGs");
  70         va_start(args, msg);
  71         switch (type) {
  72                 case WMESSAGE_TYPE_WARNING:
  73                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  74                                 _("warning: "));
  75                         vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  76                                 msg, args);
  77                 break;
  78                 case WMESSAGE_TYPE_FATAL:
  79                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  80                                 _("fatal error: "));
  81                         vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  82                                 msg, args);
  83                 break;
  84                 case WMESSAGE_TYPE_WSYSERROR:
  85                 case WMESSAGE_TYPE_WSYSERRORWITHCODE:
  86                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  87                                 _("error: "));
  88                         vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  89                                 msg, args);
  90                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
  91                                 ": %s", type == WMESSAGE_TYPE_WSYSERROR ?
  92                                     wstrerror(errno) : wstrerror(*(int *)extra));
  93                 break;
  94                 case WMESSAGE_TYPE_MESSAGE:
  95                         /* FALLTHROUGH */
  96                 default:
  97                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), ": ");
  98                         vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), msg, args);
  99                 break;
 100         }
 101         va_end(args);
 102         strncat(buf + strlen(buf), "\n", sizeof(buf) - strlen(buf) - 1);
 103         fputs(buf, stderr);
 104 }
 105