jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/JsonArray.h>
28#include <AK/JsonObject.h>
29#include <AK/JsonValue.h>
30#include <AK/StringBuilder.h>
31#include <LibCore/File.h>
32#include <stdio.h>
33
34static bool use_color = false;
35static void print(const String& name, const JsonValue&, Vector<String>& trail);
36
37static const char* color_name = "";
38static const char* color_index = "";
39static const char* color_brace = "";
40static const char* color_bool = "";
41static const char* color_null = "";
42static const char* color_string = "";
43static const char* color_off = "";
44
45int main(int argc, char** argv)
46{
47 if (pledge("stdio tty rpath", nullptr) < 0) {
48 perror("pledge");
49 return 1;
50 }
51
52 if (isatty(STDOUT_FILENO))
53 use_color = true;
54
55 if (pledge("stdio rpath", nullptr) < 0) {
56 perror("pledge");
57 return 1;
58 }
59
60 if (argc != 2) {
61 fprintf(stderr, "usage: gron <file>\n");
62 return 0;
63 }
64 auto file = Core::File::construct(argv[1]);
65 if (!file->open(Core::IODevice::ReadOnly)) {
66 fprintf(stderr, "Couldn't open %s for reading: %s\n", argv[1], file->error_string());
67 return 1;
68 }
69
70 if (pledge("stdio", nullptr) < 0) {
71 perror("pledge");
72 return 1;
73 }
74
75 auto file_contents = file->read_all();
76 auto json = JsonValue::from_string(file_contents);
77
78 if (use_color) {
79 color_name = "\033[33;1m";
80 color_index = "\033[35;1m";
81 color_brace = "\033[36m";
82 color_bool = "\033[32;1m";
83 color_string = "\033[31;1m";
84 color_null = "\033[34;1m";
85 color_off = "\033[0m";
86 }
87
88 Vector<String> trail;
89 print("json", json, trail);
90 return 0;
91}
92
93static void print(const String& name, const JsonValue& value, Vector<String>& trail)
94{
95 for (size_t i = 0; i < trail.size(); ++i)
96 printf("%s", trail[i].characters());
97
98 printf("%s%s%s = ", color_name, name.characters(), color_off);
99
100 if (value.is_object()) {
101 printf("%s{}%s;\n", color_brace, color_off);
102 trail.append(String::format("%s%s%s.", color_name, name.characters(), color_off));
103 value.as_object().for_each_member([&](auto& on, auto& ov) { print(on, ov, trail); });
104 trail.take_last();
105 return;
106 }
107 if (value.is_array()) {
108 printf("%s[]%s;\n", color_brace, color_off);
109 trail.append(String::format("%s%s%s", color_name, name.characters(), color_off));
110 for (int i = 0; i < value.as_array().size(); ++i) {
111 auto element_name = String::format("%s%s[%s%s%d%s%s]%s", color_off, color_brace, color_off, color_index, i, color_off, color_brace, color_off);
112 print(element_name, value.as_array()[i], trail);
113 }
114 trail.take_last();
115 return;
116 }
117 switch (value.type()) {
118 case JsonValue::Type::Null:
119 case JsonValue::Type::Undefined:
120 printf("%s", color_null);
121 break;
122 case JsonValue::Type::Bool:
123 printf("%s", color_bool);
124 break;
125 case JsonValue::Type::String:
126 printf("%s", color_string);
127 break;
128 default:
129 printf("%s", color_index);
130 break;
131 }
132
133 printf("%s%s;\n", value.serialized<StringBuilder>().characters(), color_off);
134}