1 // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
2 /*
3 * Simple streaming JSON writer
4 *
5 * This takes care of the annoying bits of JSON syntax like the commas
6 * after elements
7 *
8 * Authors: Stephen Hemminger <[email protected]>
9 *
10 * Borrowed from Linux kernel [5.17.0]: tools/bpf/bpftool/json_writer.[hc]
11 */
12
13 #include <stdio.h>
14 #include <stdbool.h>
15 #include <stdarg.h>
16 #include <assert.h>
17 #include <malloc.h>
18 #include <inttypes.h>
19 #include <stdint.h>
20
21 #include "../lib/sg_json_builder.h"
22
main(int argc,char ** argv)23 int main(int argc, char **argv)
24 {
25 json_writer_t *wr = jsonw_new(stdout);
26
27 jsonw_start_object(wr);
28 jsonw_pretty(wr, true);
29 jsonw_name(wr, "Vyatta");
30 jsonw_start_object(wr);
31 jsonw_string_field(wr, "url", "http://vyatta.com");
32 jsonw_uint_field(wr, "downloads", 2000000ul);
33 jsonw_float_field(wr, "stock", 8.16);
34
35 jsonw_name(wr, "ARGV");
36 jsonw_start_array(wr);
37 while (--argc)
38 jsonw_string(wr, *++argv);
39 jsonw_end_array(wr);
40
41 jsonw_name(wr, "empty");
42 jsonw_start_array(wr);
43 jsonw_end_array(wr);
44
45 jsonw_name(wr, "NIL");
46 jsonw_start_object(wr);
47 jsonw_end_object(wr);
48
49 jsonw_null_field(wr, "my_null");
50
51 jsonw_name(wr, "special chars");
52 jsonw_start_array(wr);
53 jsonw_string_field(wr, "slash", "/");
54 jsonw_string_field(wr, "newline", "\n");
55 jsonw_string_field(wr, "tab", "\t");
56 jsonw_string_field(wr, "ff", "\f");
57 jsonw_string_field(wr, "quote", "\"");
58 jsonw_string_field(wr, "tick", "\'");
59 jsonw_string_field(wr, "backslash", "\\");
60 jsonw_end_array(wr);
61
62 jsonw_name(wr, "ARGV");
63 jsonw_start_array(wr);
64 jsonw_string(wr, "boo: appended or new entry?");
65 jsonw_end_array(wr);
66
67 jsonw_end_object(wr);
68
69 jsonw_end_object(wr);
70 jsonw_destroy(&wr);
71 return 0;
72 }
73
74