text: /*
   * Copyright (c) 2011-2012, Swedish Institute of Computer Science.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the Institute nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * This file is part of the Contiki operating system.
   */
  
  /**
   * \file
   *         JSON output generation
   * \author
   *         Niclas Finne <nfi@sics.se>
   *         Joakim Eriksson <joakime@sics.se>
   */
  
  #ifndef JSONTREE_H_
  #define JSONTREE_H_
  
  #include "c_types.h"
  #include "json.h"
  
  #ifdef JSONTREE_CONF_MAX_DEPTH
  #define JSONTREE_MAX_DEPTH JSONTREE_CONF_MAX_DEPTH
  #else
  #define JSONTREE_MAX_DEPTH 10
  #endif /* JSONTREE_CONF_MAX_DEPTH */
  
  #ifdef JSONTREE_CONF_PRETTY
  #define JSONTREE_PRETTY JSONTREE_CONF_PRETTY
  #else
  #define JSONTREE_PRETTY 0
  #endif /* JSONTREE_CONF_PRETTY */
  
  struct jsontree_context {
    struct jsontree_value *values[JSONTREE_MAX_DEPTH];
    uint16_t index[JSONTREE_MAX_DEPTH];
    int (* putchar)(int);
    uint8_t depth;
    uint8_t path;
    int callback_state;
  };
  
  struct jsontree_value {
    uint8_t type;
    /* followed by a value */
  };
  
  struct jsontree_string {
    uint8_t type;
    const char *value;
  };
  
  struct jsontree_uint {
    uint8_t type;
    unsigned int value;
  };
  
  struct jsontree_int {
    uint8_t type;
    int value;
  };
  
  /* NOTE: the jsontree_callback set will receive a jsonparse state */
  struct jsonparse_state;
  struct jsontree_callback {
    uint8_t type;
    int (* output)(struct jsontree_context *js_ctx);
    int (* set)(struct jsontree_context *js_ctx, struct jsonparse_state *parser);
  };
  
  struct jsontree_pair {
    const char *name;
    struct jsontree_value *value;
  };
  
  struct jsontree_object {
    uint8_t type;
    uint8_t count;
    struct jsontree_pair *pairs;
  };
  
  struct jsontree_array {
    uint8_t type;
    uint8_t count;
    struct jsontree_value **values;
  };
  
  struct jsontree_ptr {
    uint8_t type;
    const void *value;
  };
  
  #define JSONTREE_STRING(text) {JSON_TYPE_STRING, (text)}
  #define JSONTREE_PAIR(name, value) {(name), (struct jsontree_value *)(value)}
  #define JSONTREE_CALLBACK(output, set) {JSON_TYPE_CALLBACK, (output), (set)}
  
  #define JSONTREE_OBJECT(name, ...)                                      \
    static struct jsontree_pair jsontree_pair_##name[] = {__VA_ARGS__};   \
    static struct jsontree_object name = {                                \
      JSON_TYPE_OBJECT,							\
      sizeof(jsontree_pair_##name)/sizeof(struct jsontree_pair),          \
      jsontree_pair_##name }
  
  #define JSONTREE_OBJECT_EXT(name, ...)                                  \
    static struct jsontree_pair jsontree_pair_##name[] = {__VA_ARGS__};   \
    struct jsontree_object name = {                                       \
      JSON_TYPE_OBJECT,							\
      sizeof(jsontree_pair_##name)/sizeof(struct jsontree_pair),          \
      jsontree_pair_##name }
      
  #define JSONTREE_ARRAY(name, count)                                     \
    static struct jsontree_value *jsontree_value##name[count];            \
    static struct jsontree_array name = {                                 \
      JSON_TYPE_ARRAY,              \
      count,                        \
      jsontree_value##name }         
  
  void jsontree_setup(struct jsontree_context *js_ctx,
                      struct jsontree_value *root, int (* putchar)(int));
  void jsontree_reset(struct jsontree_context *js_ctx);
  
  const char *jsontree_path_name(const struct jsontree_context *js_ctx,
                                 int depth);
  
  void jsontree_write_uint(const struct jsontree_context *js_ctx,
                           unsigned int value);
  void jsontree_write_int(const struct jsontree_context *js_ctx, int value);
  void jsontree_write_atom(const struct jsontree_context *js_ctx,
                           const char *text);
  void jsontree_write_string(const struct jsontree_context *js_ctx,
                             const char *text);
  int jsontree_print_next(struct jsontree_context *js_ctx);
  struct jsontree_value *jsontree_find_next(struct jsontree_context *js_ctx,
                                            int type);
  
  #endif /* JSONTREE_H_ */
  