1+ /*
2+ * This file is a part of BSL Parser Core.
3+ *
4+ * Copyright (c) 2018-2025
5+ * Alexey Sosnoviy <[email protected] >, Nikita Fedkin <[email protected] >, Valery Maximov <[email protected] > 6+ *
7+ * SPDX-License-Identifier: LGPL-3.0-or-later
8+ *
9+ * BSL Parser Core is free software; you can redistribute it and/or
10+ * modify it under the terms of the GNU Lesser General Public
11+ * License as published by the Free Software Foundation; either
12+ * version 3.0 of the License, or (at your option) any later version.
13+ *
14+ * BSL Parser Core is distributed in the hope that it will be useful,
15+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
16+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17+ * Lesser General Public License for more details.
18+ *
19+ * You should have received a copy of the GNU Lesser General Public
20+ * License along with BSL Parser Core.
21+ */
22+ /*
23+ Originally released by BSD 3-clause license:
24+
25+ Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
26+
27+ Redistribution and use in source and binary forms, with or without
28+ modification, are permitted provided that the following conditions
29+ are met:
30+
31+ 1. Redistributions of source code must retain the above copyright
32+ notice, this list of conditions and the following disclaimer.
33+ 2. Redistributions in binary form must reproduce the above copyright
34+ notice, this list of conditions and the following disclaimer in the
35+ documentation and/or other materials provided with the distribution.
36+ 3. Neither the name of the copyright holder nor the names of its contributors
37+ may be used to endorse or promote products derived from this software
38+ without specific prior written permission.
39+
40+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
41+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
42+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
43+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
44+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
46+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
47+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
48+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
49+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50+ */
51+ package com .github ._1c_syntax .bsl .parser ;
52+
53+ import org .antlr .v4 .runtime .CharStream ;
54+ import org .antlr .v4 .runtime .UnicodeCharStream ;
55+ import org .antlr .v4 .runtime .misc .Interval ;
56+
57+ /**
58+ * This class supports case-insensitive lexing by wrapping an existing
59+ * {@link CharStream} and forcing the lexer to see either upper or
60+ * lowercase characters. Grammar literals should then be either upper or
61+ * lower case such as 'BEGIN' or 'begin'. The text of the character
62+ * stream is unaffected. Example: input 'BeGiN' would match lexer rule
63+ * 'BEGIN' if constructor parameter upper=true but getText() would return
64+ * 'BeGiN'.
65+ */
66+ public class CaseChangingCharStream implements UnicodeCharStream {
67+
68+ private final UnicodeCharStream stream ;
69+
70+ /**
71+ * Constructs a new CaseChangingCharStream wrapping the given {@link UnicodeCharStream} forcing
72+ * all characters to upper case.
73+ *
74+ * @param stream The stream to wrap.
75+ */
76+ public CaseChangingCharStream (UnicodeCharStream stream ) {
77+ this .stream = stream ;
78+ }
79+
80+ @ Override
81+ public String getText (Interval interval ) {
82+ return stream .getText (interval );
83+ }
84+
85+ @ Override
86+ public void consume () {
87+ stream .consume ();
88+ }
89+
90+ @ Override
91+ public int LA (int i ) {
92+ int c = stream .LA (i );
93+ if (c <= 0 ) {
94+ return c ;
95+ }
96+ return Character .toUpperCase (c );
97+ }
98+
99+ @ Override
100+ public int mark () {
101+ return stream .mark ();
102+ }
103+
104+ @ Override
105+ public void release (int marker ) {
106+ stream .release (marker );
107+ }
108+
109+ @ Override
110+ public int index () {
111+ return stream .index ();
112+ }
113+
114+ @ Override
115+ public void seek (int index ) {
116+ stream .seek (index );
117+ }
118+
119+ @ Override
120+ public int size () {
121+ return stream .size ();
122+ }
123+
124+ @ Override
125+ public String getSourceName () {
126+ return stream .getSourceName ();
127+ }
128+
129+ @ Override
130+ public boolean supportsUnicodeCodePoints () {
131+ return stream .supportsUnicodeCodePoints ();
132+ }
133+ }
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