text: /*
   * Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org>
   *
   * Jansson is free software; you can redistribute it and/or modify
   * it under the terms of the MIT license. See LICENSE for details.
   */
  
  #ifndef JANSSON_PRIVATE_H
  #define JANSSON_PRIVATE_H
  
  #include "jansson_private_config.h"
  #include <stddef.h>
  #include "jansson.h"
  #include "hashtable.h"
  #include "strbuffer.h"
  
  #define container_of(ptr_, type_, member_)  \
      ((type_ *)((char *)ptr_ - offsetof(type_, member_)))
  
  /* On some platforms, max() may already be defined */
  #ifndef max
  #define max(a, b)  ((a) > (b) ? (a) : (b))
  #endif
  
  /* va_copy is a C99 feature. In C89 implementations, it's sometimes
     available as __va_copy. If not, memcpy() should do the trick. */
  #ifndef va_copy
  #ifdef __va_copy
  #define va_copy __va_copy
  #else
  #define va_copy(a, b)  memcpy(&(a), &(b), sizeof(va_list))
  #endif
  #endif
  
  typedef struct {
      json_t json;
      hashtable_t hashtable;
  } json_object_t;
  
  typedef struct {
      json_t json;
      size_t size;
      size_t entries;
      json_t **table;
  } json_array_t;
  
  typedef struct {
      json_t json;
      char *value;
      size_t length;
  } json_string_t;
  
  typedef struct {
      json_t json;
      double value;
  } json_real_t;
  
  typedef struct {
      json_t json;
      json_int_t value;
  } json_integer_t;
  
  #define json_to_object(json_)  container_of(json_, json_object_t, json)
  #define json_to_array(json_)   container_of(json_, json_array_t, json)
  #define json_to_string(json_)  container_of(json_, json_string_t, json)
  #define json_to_real(json_)    container_of(json_, json_real_t, json)
  #define json_to_integer(json_) container_of(json_, json_integer_t, json)
  
  /* Create a string by taking ownership of an existing buffer */
  json_t *jsonp_stringn_nocheck_own(const char *value, size_t len);
  
  /* Error message formatting */
  void jsonp_error_init(json_error_t *error, const char *source);
  void jsonp_error_set_source(json_error_t *error, const char *source);
  void jsonp_error_set(json_error_t *error, int line, int column,
                       size_t position, enum json_error_code code,
                       const char *msg, ...);
  void jsonp_error_vset(json_error_t *error, int line, int column,
                        size_t position, enum json_error_code code,
                        const char *msg, va_list ap);
  
  /* Locale independent string<->double conversions */
  int jsonp_strtod(strbuffer_t *strbuffer, double *out);
  int jsonp_dtostr(char *buffer, size_t size, double value, int prec);
  
  /* Wrappers for custom memory functions */
  void* jsonp_malloc(size_t size);
  void jsonp_free(void *ptr);
  char *jsonp_strndup(const char *str, size_t length);
  char *jsonp_strdup(const char *str);
  char *jsonp_strndup(const char *str, size_t len);
  
  
  /* Windows compatibility */
  #if defined(_WIN32) || defined(WIN32)
  #  if defined(_MSC_VER)  /* MS compiller */
  #    if (_MSC_VER < 1900) && !defined(snprintf)  /* snprintf not defined yet & not introduced */
  #      define snprintf _snprintf
  #    endif
  #    if (_MSC_VER < 1500) && !defined(vsnprintf)  /* vsnprintf not defined yet & not introduced */
  #      define vsnprintf(b,c,f,a) _vsnprintf(b,c,f,a)
  #    endif
  #  else  /* Other Windows compiller, old definition */
  #    define snprintf _snprintf
  #    define vsnprintf _vsnprintf
  #  endif
  #endif
  
  #endif
  