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1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */2/*3 * Simple streaming JSON writer4 *5 * This takes care of the annoying bits of JSON syntax like the commas6 * after elements7 *8 * Authors: Stephen Hemminger <stephen@networkplumber.org>9 */10 11#ifndef _JSON_WRITER_H_12#define _JSON_WRITER_H_13 14#include <stdbool.h>15#include <stdint.h>16#include <stdarg.h>17#include <stdio.h>18#include <linux/compiler.h>19 20/* Opaque class structure */21typedef struct json_writer json_writer_t;22 23/* Create a new JSON stream */24json_writer_t *jsonw_new(FILE *f);25/* End output to JSON stream */26void jsonw_destroy(json_writer_t **self_p);27 28/* Cause output to have pretty whitespace */29void jsonw_pretty(json_writer_t *self, bool on);30 31/* Reset separator to create new JSON */32void jsonw_reset(json_writer_t *self);33 34/* Add property name */35void jsonw_name(json_writer_t *self, const char *name);36 37/* Add value */38void __printf(2, 0) jsonw_vprintf_enquote(json_writer_t *self, const char *fmt,39 va_list ap);40void __printf(2, 3) jsonw_printf(json_writer_t *self, const char *fmt, ...);41void jsonw_string(json_writer_t *self, const char *value);42void jsonw_bool(json_writer_t *self, bool value);43void jsonw_float(json_writer_t *self, double number);44void jsonw_float_fmt(json_writer_t *self, const char *fmt, double num);45void jsonw_uint(json_writer_t *self, uint64_t number);46void jsonw_hu(json_writer_t *self, unsigned short number);47void jsonw_int(json_writer_t *self, int64_t number);48void jsonw_null(json_writer_t *self);49void jsonw_lluint(json_writer_t *self, unsigned long long int num);50 51/* Useful Combinations of name and value */52void jsonw_string_field(json_writer_t *self, const char *prop, const char *val);53void jsonw_bool_field(json_writer_t *self, const char *prop, bool value);54void jsonw_float_field(json_writer_t *self, const char *prop, double num);55void jsonw_uint_field(json_writer_t *self, const char *prop, uint64_t num);56void jsonw_hu_field(json_writer_t *self, const char *prop, unsigned short num);57void jsonw_int_field(json_writer_t *self, const char *prop, int64_t num);58void jsonw_null_field(json_writer_t *self, const char *prop);59void jsonw_lluint_field(json_writer_t *self, const char *prop,60 unsigned long long int num);61void jsonw_float_field_fmt(json_writer_t *self, const char *prop,62 const char *fmt, double val);63 64/* Collections */65void jsonw_start_object(json_writer_t *self);66void jsonw_end_object(json_writer_t *self);67 68void jsonw_start_array(json_writer_t *self);69void jsonw_end_array(json_writer_t *self);70 71/* Override default exception handling */72typedef void (jsonw_err_handler_fn)(const char *);73 74#endif /* _JSON_WRITER_H_ */75