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/* Procedural lookup of box drawing characters.
Copyright (C) 2023 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#define INCLUDE_VECTOR
#include "system.h"
#include "coretypes.h"
#include "text-art/box-drawing.h"
#include "selftest.h"
#include "text-art/selftests.h"
/* According to
https://en.wikipedia.org/wiki/Box-drawing_character#Character_code
"DOS line- and box-drawing characters are not ordered in any programmatic
manner, so calculating a particular character shape needs to use a look-up
table. "
Hence this array. */
static const cppchar_t box_drawing_chars[] = {
#include "text-art/box-drawing-chars.inc"
};
cppchar_t
text_art::get_box_drawing_char (directions line_dirs)
{
const size_t idx = line_dirs.as_index ();
gcc_assert (idx < 16);
return box_drawing_chars[idx];
}
#if CHECKING_P
namespace selftest {
/* Run all selftests in this file. */
void
text_art_box_drawing_cc_tests ()
{
ASSERT_EQ (text_art::get_box_drawing_char
(text_art::directions (false, false, false, false)),
' ');
ASSERT_EQ (text_art::get_box_drawing_char
(text_art::directions (false, false, true, true)),
0x2500); /* BOX DRAWINGS LIGHT HORIZONTAL */
ASSERT_EQ (text_art::get_box_drawing_char
(text_art::directions (true, true, false, false)),
0x2502); /* BOX DRAWINGS LIGHT VERTICAL */
ASSERT_EQ (text_art::get_box_drawing_char
(text_art::directions (true, false, true, false)),
0x2518); /* BOX DRAWINGS LIGHT UP AND LEFT */
}
} // namespace selftest
#endif /* #if CHECKING_P */
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