text: /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
  /*
   * Simple streaming JSON writer
   *
   * This takes care of the annoying bits of JSON syntax like the commas
   * after elements
   *
   * Authors:	Stephen Hemminger <stephen@networkplumber.org>
   */
  
  #ifndef _JSON_WRITER_H_
  #define _JSON_WRITER_H_
  
  #include <stdbool.h>
  #include <stdint.h>
  #include <stdarg.h>
  #include <linux/compiler.h>
  
  /* Opaque class structure */
  typedef struct json_writer json_writer_t;
  
  /* Create a new JSON stream */
  json_writer_t *jsonw_new(FILE *f);
  /* End output to JSON stream */
  void jsonw_destroy(json_writer_t **self_p);
  
  /* Cause output to have pretty whitespace */
  void jsonw_pretty(json_writer_t *self, bool on);
  
  /* Add property name */
  void jsonw_name(json_writer_t *self, const char *name);
  
  /* Add value  */
  void __printf(2, 0) jsonw_vprintf_enquote(json_writer_t *self, const char *fmt,
  					  va_list ap);
  void __printf(2, 3) jsonw_printf(json_writer_t *self, const char *fmt, ...);
  void jsonw_string(json_writer_t *self, const char *value);
  void jsonw_bool(json_writer_t *self, bool value);
  void jsonw_float(json_writer_t *self, double number);
  void jsonw_float_fmt(json_writer_t *self, const char *fmt, double num);
  void jsonw_uint(json_writer_t *self, uint64_t number);
  void jsonw_hu(json_writer_t *self, unsigned short number);
  void jsonw_int(json_writer_t *self, int64_t number);
  void jsonw_null(json_writer_t *self);
  void jsonw_lluint(json_writer_t *self, unsigned long long int num);
  
  /* Useful Combinations of name and value */
  void jsonw_string_field(json_writer_t *self, const char *prop, const char *val);
  void jsonw_bool_field(json_writer_t *self, const char *prop, bool value);
  void jsonw_float_field(json_writer_t *self, const char *prop, double num);
  void jsonw_uint_field(json_writer_t *self, const char *prop, uint64_t num);
  void jsonw_hu_field(json_writer_t *self, const char *prop, unsigned short num);
  void jsonw_int_field(json_writer_t *self, const char *prop, int64_t num);
  void jsonw_null_field(json_writer_t *self, const char *prop);
  void jsonw_lluint_field(json_writer_t *self, const char *prop,
  			unsigned long long int num);
  void jsonw_float_field_fmt(json_writer_t *self, const char *prop,
  			   const char *fmt, double val);
  
  /* Collections */
  void jsonw_start_object(json_writer_t *self);
  void jsonw_end_object(json_writer_t *self);
  
  void jsonw_start_array(json_writer_t *self);
  void jsonw_end_array(json_writer_t *self);
  
  /* Override default exception handling */
  typedef void (jsonw_err_handler_fn)(const char *);
  
  #endif /* _JSON_WRITER_H_ */
  