gunibreak.c

   1 /* gunibreak.c - line break properties
   2  *
   3  *  Copyright 2000 Red Hat, Inc.
   4  *
   5  * The Gnome Library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * The Gnome Library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with the Gnome Library; see the file COPYING.LIB.  If not,
  17  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  *   Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "glib.h"
  22 #include "gunibreak.h"
  23
  24 #include <config.h>
  25
  26 #include <stdlib.h>
  27
  28
  29 /* We cheat a bit and cast type values to (char *).  We detect these
  30    using the &0xff trick.  */
  31 #define TPROP(Page, Char) \
  32   (((GPOINTER_TO_INT(break_property_table[Page]) & 0xff) == GPOINTER_TO_INT(break_property_table[Page])) \
  33    ? GPOINTER_TO_INT(break_property_table[Page]) \
  34    : (break_property_table[Page][Char]))
  35
  36 #define PROP(Char) (((Char) > (G_UNICODE_LAST_CHAR)) ? G_UNICODE_UNASSIGNED : TPROP ((Char) >> 8, (Char) & 0xff))
  37
  38 /**
  39  * g_unichar_break_type:
  40  * @c: a Unicode character
  41  *
  42  * Determines the break type of @c. @c should be a Unicode character
  43  * (to derive a character from UTF-8 encoded text, use
  44  * g_utf8_get_char()). The break type is used to find word and line
  45  * breaks ("text boundaries"), Pango implements the Unicode boundary
  46  * resolution alogorithms and normally you would use a function such
  47  * as pango_break() instead of caring about break types yourself.
  48  *
  49  * Return value: break type
  50  **/
  51 GUnicodeBreakType
  52 g_unichar_break_type (gunichar c)
  53 {
  54   return PROP (c);
  55 }