Function print_object

outofcore/src/cJSON.cpp:430–492

Render an object to text. */

/* Render an object to text. */
static char *print_object(cJSON *item,int depth,int fmt)
{
	char *out=nullptr;
	std::size_t len=7;
	cJSON *child=item->child;
	std::size_t numentries=0,fail=0;
	/* Count the number of entries. */
	while (child) numentries++,child=child->next;
	/* Allocate space for the names and the objects */
	char **entries = static_cast<char**>(cJSON_malloc(numentries*sizeof(char*)));
	if (!entries) return nullptr;
	char **names=static_cast<char**>(cJSON_malloc(numentries*sizeof(char*)));
	if (!names) {cJSON_free(entries);return nullptr;}
  std::fill_n(entries, numentries, nullptr);
  std::fill_n(names, numentries, nullptr);

	/* Collect all the results into our arrays: */
	child=item->child;depth++;if (fmt) len+=depth;
	int childId = 0;
	while (child)
	{
		char *str = print_string_ptr(child->string);
		names[childId] = str;
		char *ret = print_value(child,depth,fmt);
		entries[childId++] = ret;
		if (str && ret) len+=strlen(ret)+strlen(str)+2+(fmt?2+depth:0); else fail=1;
		child=child->next;
	}
	
	/* Try to allocate the output string */
	if (!fail) out=static_cast<char*> (cJSON_malloc(len));
	if (!out) fail=1;

	/* Handle failure */
	if (fail)
	{
		for (std::size_t i=0;i<numentries;i++) {if (names[i]) cJSON_free(names[i]);if (entries[i]) cJSON_free(entries[i]);}
		cJSON_free(names);cJSON_free(entries);
		return nullptr;
	}
	
	/* Compose the output: */
	*out='{';
	char *ptr = out+1;
	if (fmt)*ptr++='\n';
	*ptr=0;
	for (std::size_t i=0;i<numentries;i++)
	{
		if (fmt) for (int j=0; j < depth; j++) *ptr++='\t';
		strcpy(ptr,names[i]);ptr+=strlen(names[i]);
		*ptr++=':';if (fmt) *ptr++='\t';
		strcpy(ptr,entries[i]);ptr+=strlen(entries[i]);
		if (i!=numentries-1) *ptr++=',';
		if (fmt) *ptr++='\n';
		*ptr=0;
		cJSON_free(names[i]);cJSON_free(entries[i]);
	}