adg/adg-util.h

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2007,2008,2009,2010  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #if !defined(__ADG_H__)
  22 #error "Only <adg/adg.h> can be included directly."
  23 #endif
  24
  25
  26 #ifndef __ADG_UTIL_H__
  27 #define __ADG_UTIL_H__
  28
  29 #include <glib.h>
  30 #include <math.h>
  31
  32 #define ADG_DIR_RIGHT           0.
  33 #define ADG_DIR_DOWN            M_PI_2
  34 #define ADG_DIR_LEFT            M_PI
  35 #define ADG_DIR_UP              (M_PI_2 * 3.)
  36
  37 #define ADG_FORWARD_DECL(id)    typedef struct _##id id
  38
  39
  40 G_BEGIN_DECLS
  41
  42 #if GLIB_CHECK_VERSION(2, 16, 0)
  43 #define         adg_strcmp              g_strcmp0
  44 #else
  45 gint            adg_strcmp              (const gchar    *s1,
  46                                          const gchar    *s2);
  47 #endif
  48
  49 gboolean        adg_is_empty            (const gchar    *str);
  50
  51 G_END_DECLS
  52
  53
  54 #endif /* __ADG_UTIL_H__ */