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       1                 :             : /* Procedural lookup of box drawing characters.
       2                 :             :    Copyright (C) 2023-2024 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                 :       16782 : text_art::get_box_drawing_char (directions line_dirs)
      42                 :             : {
      43                 :       16782 :   const size_t idx = line_dirs.as_index ();
      44                 :       16782 :   gcc_assert (idx < 16);
      45                 :       16782 :   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 */