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., 51 Franklin St, Fifth Floor, Boston,
  19  *  MA 02110-1301, USA.
  20  */
  21
  22 #include "wconfig.h"
  23
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include <WUtil.h>
  31 #include <WINGsP.h>
  32
  33
  34 void __wmessage(const char *func, const char *file, int line, int type, const char *msg, ...)
  35 {
  36         va_list args;
  37         char *buf;
  38         static int linemax = 0;
  39         int truncated = 0;
  40
  41         if (linemax == 0) {
  42 #ifdef HAVE_SYSCONF
  43                 linemax = sysconf(_SC_LINE_MAX);
  44                 if (linemax == -1) {
  45                         /* I'd like to know of this ever fires */
  46                         fprintf(stderr, "%s %d: sysconf(_SC_LINE_MAX) returned error\n",
  47                                 __FILE__, __LINE__);
  48                         linemax = 512;
  49                 }
  50 #else /* !HAVE_SYSCONF */
  51                 fprintf(stderr, "%s %d: Your system does not have sysconf(3); "
  52                         "let wmaker-dev@windowmaker.org know.\n", __FILE__, __LINE__);
  53                 linemax = 512;
  54 #endif /* HAVE_SYSCONF */
  55         }
  56
  57         buf = wmalloc(linemax);
  58
  59         fflush(stdout);
  60
  61         /* message format: <wings_progname>(function(file:line): <type?>: <message>"\n" */
  62         strncat(buf, _WINGS_progname ? _WINGS_progname : "WINGs", linemax - 1);
  63         snprintf(buf + strlen(buf), linemax - strlen(buf), "(%s(%s:%d))", func, file, line);
  64         strncat(buf, ": ", linemax - 1 - strlen(buf));
  65
  66         switch (type) {
  67                 case WMESSAGE_TYPE_FATAL:
  68                         strncat(buf, _("fatal error: "), linemax - 1 - strlen(buf));
  69                 break;
  70                 case WMESSAGE_TYPE_ERROR:
  71                         strncat(buf, _("error: "), linemax - 1 - strlen(buf));
  72                 break;
  73                 case WMESSAGE_TYPE_WARNING:
  74                         strncat(buf, _("warning: "), linemax - 1 - strlen(buf));
  75                 break;
  76                 case WMESSAGE_TYPE_MESSAGE:
  77                         /* FALLTHROUGH */
  78                 default:        /* should not happen, but doesn't hurt either */
  79                 break;
  80         }
  81
  82         va_start(args, msg);
  83         if (vsnprintf(buf + strlen(buf), linemax - strlen(buf), msg, args) >= linemax - strlen(buf))
  84                 truncated = 1;
  85
  86         va_end(args);
  87
  88         fputs(buf, stderr);
  89
  90         if (truncated)
  91                 fputs("*** message truncated ***", stderr);
  92
  93         fputs("\n", stderr);
  94
  95         wfree(buf);
  96 }
  97