common/util.h

   1 /*
   2  * util.h - useful functions
   3  *
   4  * Copyright (C) 2010 Mason Larobina <mason.larobina@gmail.com>
   5  * Copyright (C) 2007-2008 Julien Danjou <julien@danjou.info>
   6  * Copyright (C) 2006 Pierre Habouzit <madcoder@debian.org>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  */
  22
  23 #ifndef LUAKIT_COMMON_UTIL_H
  24 #define LUAKIT_COMMON_UTIL_H
  25
  26 #include <glib/gtypes.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 /* Useful macros */
  31 #define NONULL(x) (x ? x : "")
  32 #define LENGTH(x) sizeof(x)/sizeof((x)[0])
  33
  34 #define fatal(string, ...) _fatal(__LINE__, __FUNCTION__, string, ##__VA_ARGS__)
  35 void _fatal(int, const gchar *, const gchar *, ...);
  36
  37 #define warn(string, ...) _warn(__LINE__, __FUNCTION__, string, ##__VA_ARGS__)
  38 void _warn(int, const gchar *, const gchar *, ...);
  39
  40 #ifdef DEBUG_MESSAGES
  41
  42 #define debug(string, ...) _debug(__LINE__, __FUNCTION__, string, ##__VA_ARGS__)
  43 void _debug(int, const gchar *, const gchar *, ...);
  44
  45 #else
  46
  47 #define debug(string, ...)
  48
  49 #endif
  50
  51 /* A NULL resistant strlen. Unlike it's libc sibling, l_strlen returns a
  52  * ssize_t, and supports its argument being NULL. */
  53 static inline ssize_t l_strlen(const gchar *s) {
  54     return s ? strlen(s) : 0;
  55 }
  56
  57 #define p_clear(p, count)       ((void)memset((p), 0, sizeof(*(p)) * (count)))
  58
  59 gboolean file_exists(const gchar*);
  60
  61 #endif
  62 // vim: ft=c:et:sw=4:ts=8:sts=4:tw=80