Function new_value

server/src/json.c:103–182

}

static int new_value
   (json_state * state, json_value ** top, json_value ** root, json_value ** alloc, json_type type)
{
   json_value * value;
   int values_size;

   if (!state->first_pass)
   {
      value = *top = *alloc;
      *alloc = (*alloc)->_reserved.next_alloc;

      if (!*root)
         *root = value;

      switch (value->type)
      {
         case json_array:

            if (! (value->u.array.values = (json_value **) json_alloc
               (state, value->u.array.length * sizeof (json_value *), 0)) )
            {
               return 0;
            }

            value->u.array.length = 0;
            break;

         case json_object:

            values_size = sizeof (*value->u.object.values) * value->u.object.length;

            void *tmp_alloc = json_alloc(state, values_size + ((unsigned long) value->u.object.values), 0);
            if (!tmp_alloc)
            {
               return 0;
            }
            /* 避免违反严格别名：通过中间变量复制 */
            memcpy(&value->u.object.values, &tmp_alloc, sizeof(void*));
            char *obj_mem = (char*)value->u.object.values + values_size;
            memcpy(&value->_reserved.object_mem, &obj_mem, sizeof(char*));

            value->u.object.length = 0;
            break;

         case json_string:

            if (! (value->u.string.ptr = (json_char *) json_alloc
               (state, (value->u.string.length + 1) * sizeof (json_char), 0)) )
            {
               return 0;
            }

            value->u.string.length = 0;
            break;

         default:
            break;
      };