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 #include "schema.h"
26
27 void Schema::show(std::ostream &out, char *argArray) {
28
29 }
30
31 void indent(std::ostream &out, int depth, char ch) {
32 while (depth-- > 0) {
33 out << ch;
34 }
35 }
36
37 void Schema::show(std::ostream &out, int depth, Node *node) {
38 indent(out, depth, ' ');
39 if (auto *schemaNode = dynamic_cast<SchemaNode *>(node)) {
40 std::cout << schemaNode->type;
41 } else if (auto *arg = dynamic_cast<ArgNode *>(node)) {
42 std::cout << arg->idx;
43 } else if (auto *structNode = dynamic_cast<StructNode *>(node)) {
44 std::cout << ((structNode->name== nullptr)?"?":structNode->name);
45 } else if (auto *unionNode = dynamic_cast<UnionNode *>(node)) {
46 std::cout << ((unionNode->name== nullptr)?"?":unionNode->name);
47 } else if (auto *array = dynamic_cast<Array *>(node)) {
48 if(array->flexible) {
49 std::cout << "[*]";
50 }else{
51 std::cout << "[" << array->elementCount << "]";
52 }
53 } else if (auto *fieldNode = dynamic_cast<FieldNode *>(node)) {
54 std::cout << ((fieldNode->name== nullptr)?"?":fieldNode->name)<<":"<<fieldNode->typeName;
55 } else {
56 std::cout << "<node?>";
57 }
58 if (node->children.empty()) {
59 std::cout << std::endl;
60 }else{
61 std::cout << "{" << std::endl;
62 for (Node *n: node->children) {
63 show(out, depth + 1, n);
64 }
65 indent(out, depth, ' ');
66 std::cout << "}" << std::endl;
67 }
68 }
69
70 void Schema::show(std::ostream &out, SchemaNode *schemaNode) {
71 show(out, 0, schemaNode);
72 }
73
74 Schema::FieldNode *Schema::FieldNode::parse(Cursor *cursor) {
75 typeName = cursor->getIdentifier();
76 return this;
77 }
78
79 Schema::Array *Schema::Array::parse(Cursor *cursor) {
80 cursor->in("Array::Parse");
81 if (cursor->is('*')) {
82 flexible = true;
83 } else if (cursor->peekDigit()) {
84 elementCount = cursor->getLong();
85 }
86 cursor->expect(':', "after element count in array", __LINE__);
87 char *identifier= nullptr;
88 if (cursor->is('?')) {
89 } else if (cursor->peekAlpha()) {
90 identifier = cursor->getIdentifier();
91 } else {
92 cursor->error(std::cerr, __FILE__, __LINE__, "expecting '?' or identifier for element");
93 }
94 cursor->expect(':', "after name in array", __LINE__);
95 if (cursor->peekAlpha()) {
96 elementType = addChild(cursor, new FieldNode(this, identifier));
97 } else if (cursor->is('{')) {
98 elementType = addChild(cursor, new StructNode(this, identifier));
99 } else if (cursor->is('<')) {
100 elementType = addChild(cursor, new UnionNode(this, identifier));
101 } else {
102 cursor->error(std::cerr, __FILE__, __LINE__, "expecting type for element");
103 }
104 cursor->expect(']', "after array type", __LINE__);
105 cursor->out();
106 return this;
107 }
108
109 Schema::AbstractStructOrUnionNode *Schema::AbstractStructOrUnionNode::parse(Cursor *cursor) {
110 cursor->in("StructUnion::parse");
111 do {
112 char *identifier = nullptr;
113 if (cursor->is('?')) {
114 // no name name = null!
115 } else if (cursor->peekAlpha()) {
116 identifier = cursor->getIdentifier();
117 }
118 cursor->expect(':', "after StrutOrUnion name", __LINE__);
119 if (cursor->peekAlpha()) {
120 typeNode = addChild(cursor, new FieldNode(this, identifier));
121 } else if (cursor->is('[')) {
122 typeNode = addChild(cursor, new Array(this));
123 } else if (cursor->is('{')) {
124 typeNode = addChild(cursor, new StructNode(this, identifier ));
125 } else if (cursor->is('<')) {
126 typeNode = addChild(cursor, new UnionNode(this, identifier));
127 } else {
128 cursor->error(std::cerr, __FILE__, __LINE__, "expecting type");
129 }
130 } while (cursor->is(separator));
131 cursor->expect(terminator, "at end of struct or union ", __LINE__);
132 cursor->out();
133 return this;
134 }
135
136 Schema::StructNode *Schema::StructNode::parse(Cursor *cursor) {
137 return dynamic_cast<StructNode *>(AbstractStructOrUnionNode::parse(cursor));
138 }
139
140 Schema::UnionNode *Schema::UnionNode::parse(Cursor *cursor) {
141 return dynamic_cast<UnionNode *>(AbstractStructOrUnionNode::parse(cursor));
142 }
143
144 Schema::ArgNode *Schema::ArgNode::parse(Cursor *cursor) {
145 cursor->in("ArgNode::parse");
146 char actual;
147 cursor->expectEither('!', '?', &actual, __LINE__);
148
149 cursor->expect(':', __LINE__);
150 if (cursor->peekAlpha()) {
151 addChild(cursor, new FieldNode(this, nullptr));
152 }else{
153 cursor->expectDigit("long byteCount of buffer", __LINE__);
154 long bytes = cursor->getLong();
155 if (cursor->isEither('#', '+', &actual)) {
156 bool complete = (actual == '#');
157 cursor->expectAlpha("identifier", __LINE__);
158 char *identifier = cursor->getIdentifier();
159 cursor->expect(':', "after identifier ", __LINE__);
160 cursor->expect('{', "top level arg struct", __LINE__);
161 addChild(cursor, new ArgStructNode(this, complete, identifier));
162 } else if (cursor->peekAlpha()) {
163 addChild(cursor, new FieldNode(this, cursor->getIdentifier()));
164 } else {
165 cursor->error(std::cerr, __FILE__, __LINE__, "expecting '#' ");
166 }
167 }
168 cursor->expect(')', "at end of NamedStructOrUnion", __LINE__);
169 cursor->out();
170
171 return this;
172 }
173
174 Schema::SchemaNode *Schema::SchemaNode::parse(Cursor *cursor) {
175 cursor->in("SchemaNode::parse");
176 cursor->expectDigit("arg count", __LINE__);
177 int argc = cursor->getInt();
178 for (int i = 0; i < argc; i++) {
179 cursor->expect('(', __LINE__);
180 addChild(cursor, new ArgNode(this, i));
181 if (i < (argc - 1)) {
182 cursor->expect(',', __LINE__);
183 }
184 }
185 cursor->out();
186 return this;
187 }
188
189