1 /*
 2  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 #pragma once
27 #include <iomanip>
28 #include <stack>
29 
30 struct SchemaCursor {
31 private:
32     std::stack<const char *> where;
33 
34 public:
35     char *ptr;
36 
37     SchemaCursor(char *ptr);
38 
39     virtual ~SchemaCursor();
40 
41     void in(const char *location);
42 
43     void out();
44 
45 private:
46     SchemaCursor *skipWhiteSpace();
47 
48     SchemaCursor *skipIdentifier();
49 
50 public:
51     void step(int count);
52 
53     bool peekAlpha();
54 
55     bool peekDigit();
56 
57     bool is(char ch);
58 
59     bool isColon();
60 
61     bool expect(char ch, const char *context, int line);
62 
63     bool expect(char ch, int line);
64 
65     bool expectDigit(const char *context, int line);
66 
67     bool expectAlpha(const char *context, int line);
68 
69     bool isEither(char ch1, char ch2, char *actual);
70 
71     void expectEither(char ch1, char ch2, char *actual, int line);
72 
73     int getInt();
74 
75     long getLong();
76 
77     char *getIdentifier();
78 
79     void error(std::ostream &ostream, const char *file, int line, const char *str) const;
80 };