1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
3 * Simple streaming JSON writer
5 * This takes care of the annoying bits of JSON syntax like the commas
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
13 * Authors: Stephen Hemminger <stephen@networkplumber.org>
16 #ifndef _JSON_WRITER_H_
17 #define _JSON_WRITER_H_
23 /* Opaque class structure */
24 typedef struct json_writer json_writer_t;
26 /* Create a new JSON stream */
27 json_writer_t *jsonw_new(FILE *f);
28 /* End output to JSON stream */
29 void jsonw_destroy(json_writer_t **self_p);
31 /* Cause output to have pretty whitespace */
32 void jsonw_pretty(json_writer_t *self, bool on);
34 /* Add property name */
35 void jsonw_name(json_writer_t *self, const char *name);
38 void jsonw_vprintf_enquote(json_writer_t *self, const char *fmt, va_list ap);
39 void jsonw_printf(json_writer_t *self, const char *fmt, ...);
40 void jsonw_string(json_writer_t *self, const char *value);
41 void jsonw_bool(json_writer_t *self, bool value);
42 void jsonw_float(json_writer_t *self, double number);
43 void jsonw_float_fmt(json_writer_t *self, const char *fmt, double num);
44 void jsonw_uint(json_writer_t *self, uint64_t number);
45 void jsonw_hu(json_writer_t *self, unsigned short number);
46 void jsonw_int(json_writer_t *self, int64_t number);
47 void jsonw_null(json_writer_t *self);
48 void jsonw_lluint(json_writer_t *self, unsigned long long int num);
50 /* Useful Combinations of name and value */
51 void jsonw_string_field(json_writer_t *self, const char *prop, const char *val);
52 void jsonw_bool_field(json_writer_t *self, const char *prop, bool value);
53 void jsonw_float_field(json_writer_t *self, const char *prop, double num);
54 void jsonw_uint_field(json_writer_t *self, const char *prop, uint64_t num);
55 void jsonw_hu_field(json_writer_t *self, const char *prop, unsigned short num);
56 void jsonw_int_field(json_writer_t *self, const char *prop, int64_t num);
57 void jsonw_null_field(json_writer_t *self, const char *prop);
58 void jsonw_lluint_field(json_writer_t *self, const char *prop,
59 unsigned long long int num);
60 void jsonw_float_field_fmt(json_writer_t *self, const char *prop,
61 const char *fmt, double val);
64 void jsonw_start_object(json_writer_t *self);
65 void jsonw_end_object(json_writer_t *self);
67 void jsonw_start_array(json_writer_t *self);
68 void jsonw_end_array(json_writer_t *self);
70 /* Override default exception handling */
71 typedef void (jsonw_err_handler_fn)(const char *);
73 #endif /* _JSON_WRITER_H_ */