1  /* gunibreak.c - line break properties
       2   *
       3   *  Copyright 2000 Red Hat, Inc.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   *
       7   * This library is free software; you can redistribute it and/or
       8   * modify it under the terms of the GNU Lesser General Public
       9   * License as published by the Free Software Foundation; either
      10   * version 2.1 of the License, or (at your option) any later version.
      11   *
      12   * This library is distributed in the hope that it will be useful,
      13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15   * Lesser General Public License for more details.
      16   *
      17   * You should have received a copy of the GNU Lesser General Public License
      18   * along with this library; if not, see <http://www.gnu.org/licenses/>.
      19   */
      20  
      21  #include "config.h"
      22  
      23  #include <stdlib.h>
      24  
      25  #include "gunibreak.h"
      26  
      27  #define TPROP_PART1(Page, Char) \
      28    ((break_property_table_part1[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
      29     ? (break_property_table_part1[Page] - G_UNICODE_MAX_TABLE_INDEX) \
      30     : (break_property_data[break_property_table_part1[Page]][Char]))
      31  
      32  #define TPROP_PART2(Page, Char) \
      33    ((break_property_table_part2[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
      34     ? (break_property_table_part2[Page] - G_UNICODE_MAX_TABLE_INDEX) \
      35     : (break_property_data[break_property_table_part2[Page]][Char]))
      36  
      37  #define PROP(Char) \
      38    (((Char) <= G_UNICODE_LAST_CHAR_PART1) \
      39     ? TPROP_PART1 ((Char) >> 8, (Char) & 0xff) \
      40     : (((Char) >= 0xe0000 && (Char) <= G_UNICODE_LAST_CHAR) \
      41        ? TPROP_PART2 (((Char) - 0xe0000) >> 8, (Char) & 0xff) \
      42        : G_UNICODE_BREAK_UNKNOWN))
      43  
      44  /**
      45   * g_unichar_break_type:
      46   * @c: a Unicode character
      47   * 
      48   * Determines the break type of @c. @c should be a Unicode character
      49   * (to derive a character from UTF-8 encoded text, use
      50   * g_utf8_get_char()). The break type is used to find word and line
      51   * breaks ("text boundaries"), Pango implements the Unicode boundary
      52   * resolution algorithms and normally you would use a function such
      53   * as pango_break() instead of caring about break types yourself.
      54   * 
      55   * Returns: the break type of @c
      56   **/
      57  GUnicodeBreakType
      58  g_unichar_break_type (gunichar c)
      59  {
      60    return PROP (c);
      61  }