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 <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28
  29 #include <WUtil.h>
  30
  31 extern char *_WINGS_progname;
  32
  33 void __wmessage(const char *func, const char *file, int line, int type, const char *msg, ...)
  34 {
  35         va_list args;
  36         char *buf;
  37         static int linemax = 0;
  38         int truncated = 0;
  39
  40         if (linemax == 0) {
  41 #ifdef HAVE_SYSCONF
  42                 linemax = sysconf(_SC_LINE_MAX);
  43                 if (linemax == -1) {
  44                         /* I'd like to know of this ever fires */
  45                         fprintf(stderr, "%s %d: sysconf(_SC_LINE_MAX) returned error\n",
  46                                 __FILE__, __LINE__);
  47                         linemax = 512;
  48                 }
  49 #else /* !HAVE_SYSCONF */
  50                 fprintf(stderr, "%s %d: Your system does not have sysconf(3); "
  51                         "let wmaker-dev@windowmaker.org know.\n", __FILE__, __LINE__);
  52                 linemax = 512;
  53 #endif /* HAVE_SYSCONF */
  54         }
  55
  56         buf = wmalloc(linemax);
  57
  58         fflush(stdout);
  59
  60         /* message format: <wings_progname>(function(file:line): <type?>: <message>"\n" */
  61         strncat(buf, _WINGS_progname ? _WINGS_progname : "WINGs", linemax - 1);
  62         snprintf(buf + strlen(buf), linemax - strlen(buf), "(%s(%s:%d))", func, file, line);
  63         strncat(buf, ": ", linemax - 1 - strlen(buf));
  64
  65         switch (type) {
  66                 case WMESSAGE_TYPE_FATAL:
  67                         strncat(buf, _("fatal error: "), linemax - 1 - strlen(buf));
  68                 break;
  69                 case WMESSAGE_TYPE_ERROR:
  70                         strncat(buf, _("error: "), linemax - 1 - strlen(buf));
  71                 break;
  72                 case WMESSAGE_TYPE_WARNING:
  73                         strncat(buf, _("warning: "), linemax - 1 - strlen(buf));
  74                 break;
  75                 case WMESSAGE_TYPE_MESSAGE:
  76                         /* FALLTHROUGH */
  77                 default:        /* should not happen, but doesn't hurt either */
  78                 break;
  79         }
  80
  81         va_start(args, msg);
  82         if (vsnprintf(buf + strlen(buf), linemax - strlen(buf), msg, args) >= linemax - strlen(buf))
  83                 truncated = 1;
  84
  85         va_end(args);
  86
  87         fputs(buf, stderr);
  88
  89         if (truncated)
  90                 fputs("*** message truncated ***", stderr);
  91
  92         fputs("\n", stderr);
  93
  94         wfree(buf);
  95 }
  96