Line data    Source code

       1              : /* Procedural lookup of box drawing characters.
       2              :    Copyright (C) 2023-2026 Free Software Foundation, Inc.
       3              :    Contributed by David Malcolm <dmalcolm@redhat.com>.
       4              : 
       5              : This file is part of GCC.
       6              : 
       7              : GCC is free software; you can redistribute it and/or modify it under
       8              : the terms of the GNU General Public License as published by the Free
       9              : Software Foundation; either version 3, or (at your option) any later
      10              : version.
      11              : 
      12              : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      13              : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      14              : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      15              : for more details.
      16              : 
      17              : You should have received a copy of the GNU General Public License
      18              : along with GCC; see the file COPYING3.  If not see
      19              : <http://www.gnu.org/licenses/>.  */
      20              : 
      21              : #include "config.h"
      22              : #define INCLUDE_VECTOR
      23              : #include "system.h"
      24              : #include "coretypes.h"
      25              : #include "text-art/box-drawing.h"
      26              : #include "selftest.h"
      27              : #include "text-art/selftests.h"
      28              : 
      29              : 
      30              : /* According to
      31              :      https://en.wikipedia.org/wiki/Box-drawing_character#Character_code
      32              :    "DOS line- and box-drawing characters are not ordered in any programmatic
      33              :    manner, so calculating a particular character shape needs to use a look-up
      34              :    table. "
      35              :    Hence this array.  */
      36              : static const cppchar_t box_drawing_chars[] = {
      37              : #include "text-art/box-drawing-chars.inc"
      38              : };
      39              : 
      40              : cppchar_t
      41        16554 : text_art::get_box_drawing_char (directions line_dirs)
      42              : {
      43        16554 :   const size_t idx = line_dirs.as_index ();
      44        16554 :   gcc_assert (idx < 16);
      45        16554 :   return box_drawing_chars[idx];
      46              : }
      47              : 
      48              : #if CHECKING_P
      49              : 
      50              : namespace selftest {
      51              : 
      52              : /* Run all selftests in this file.  */
      53              : 
      54              : void
      55            4 : text_art_box_drawing_cc_tests ()
      56              : {
      57            4 :   ASSERT_EQ (text_art::get_box_drawing_char
      58              :               (text_art::directions (false, false, false, false)),
      59              :              ' ');
      60            4 :   ASSERT_EQ (text_art::get_box_drawing_char
      61              :                (text_art::directions (false, false, true, true)),
      62              :              0x2500); /* BOX DRAWINGS LIGHT HORIZONTAL */
      63            4 :   ASSERT_EQ (text_art::get_box_drawing_char
      64              :                (text_art::directions (true, true, false, false)),
      65              :              0x2502); /* BOX DRAWINGS LIGHT VERTICAL */
      66            4 :   ASSERT_EQ (text_art::get_box_drawing_char
      67              :                (text_art::directions (true, false, true, false)),
      68              :              0x2518); /* BOX DRAWINGS LIGHT UP AND LEFT */
      69            4 : }
      70              : 
      71              : } // namespace selftest
      72              : 
      73              : #endif /* #if CHECKING_P */