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1 : : /* Support for selftests involving diagnostic_show_locus.
2 : : Copyright (C) 1999-2025 Free Software Foundation, Inc.
3 : :
4 : : This file is part of GCC.
5 : :
6 : : GCC is free software; you can redistribute it and/or modify it under
7 : : the terms of the GNU General Public License as published by the Free
8 : : Software Foundation; either version 3, or (at your option) any later
9 : : version.
10 : :
11 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 : : for more details.
15 : :
16 : : You should have received a copy of the GNU General Public License
17 : : along with GCC; see the file COPYING3. If not see
18 : : <http://www.gnu.org/licenses/>. */
19 : :
20 : : #ifndef GCC_DIAGNOSTICS_SELFTEST_SOURCE_PRINTING_H
21 : : #define GCC_DIAGNOSTICS_SELFTEST_SOURCE_PRINTING_H
22 : :
23 : : #include "selftest.h"
24 : : #include "diagnostics/file-cache.h"
25 : :
26 : : /* The selftest code should entirely disappear in a production
27 : : configuration, hence we guard all of it with #if CHECKING_P. */
28 : :
29 : : #if CHECKING_P
30 : :
31 : : namespace diagnostics {
32 : : namespace selftest {
33 : :
34 : : /* RAII class for use in selftests involving diagnostic_show_locus.
35 : :
36 : : Manages creating and cleaning up the following:
37 : : - writing out a temporary .c file containing CONTENT
38 : : - temporarily override the global "line_table" (using CASE_) and
39 : : push a line_map starting at the first line of the temporary file
40 : : - provide a file_cache. */
41 : :
42 : : struct source_printing_fixture
43 : : {
44 : : source_printing_fixture (const ::selftest::line_table_case &case_,
45 : : const char *content);
46 : :
47 : 544 : const char *get_filename () const
48 : : {
49 : 544 : return m_tmp_source_file.get_filename ();
50 : : }
51 : :
52 : : const char *m_content;
53 : : ::selftest::temp_source_file m_tmp_source_file;
54 : : ::selftest::line_table_test m_ltt;
55 : : file_cache m_fc;
56 : : };
57 : :
58 : : /* Fixture for one-liner tests exercising multibyte awareness. For
59 : : simplicity we stick to using two multibyte characters in the test, U+1F602
60 : : == "\xf0\x9f\x98\x82", which uses 4 bytes and 2 display columns, and U+03C0
61 : : == "\xcf\x80", which uses 2 bytes and 1 display column.
62 : :
63 : : This works with the following 1-line source file:
64 : :
65 : : .0000000001111111111222222 display
66 : : .1234567890123456789012345 columns
67 : : "SS_foo = P_bar.SS_fieldP;\n"
68 : : .0000000111111111222222223 byte
69 : : .1356789012456789134567891 columns
70 : :
71 : : Here SS represents the two display columns for the U+1F602 emoji and
72 : : P represents the one display column for the U+03C0 pi symbol. */
73 : :
74 : 288 : struct source_printing_fixture_one_liner_utf8
75 : : : public source_printing_fixture
76 : : {
77 : : source_printing_fixture_one_liner_utf8 (const ::selftest::line_table_case &case_);
78 : : };
79 : :
80 : : } // namespace diagnostics::selftest
81 : : } // namespace diagnostics
82 : :
83 : : #endif /* #if CHECKING_P */
84 : :
85 : : #endif /* GCC_DIAGNOSTICS_SELFTEST_SOURCE_PRINTING_H */
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