示例#1
0
        /// <summary>
        /// Skips to the field with the specified name. Does not traverse descendants.
        /// </summary>
        /// <param name="key">The name of the field.</param>
        /// <returns>True if the reader wound up on said, field, otherwise, false</returns>
        /// <remarks>This will return false unless called from an object start or from a field.</remarks>
        public bool SkipToField(string key, bool searchDescendants = false)
        {
            string okey = key;

            key = JsonObject.DecorateString(okey);
            string rv;

            if (searchDescendants)
            {
                while (Read())
                {
                    if (1 == _state)                     // key
                    {
                        rv = _pc.GetCapture();
                        if (key == rv)
                        {
                            return(true);
                        }
                    }
                }
                return(false);
            }
            switch (_state)
            {
            case -1:
                if (Read())
                {
                    return(SkipToField(okey));
                }
                return(false);

            case 4:
                while (Read() && 1 == _state)                         // first read will move to the child field of the root
                {
                    rv = _pc.GetCapture();
                    if (key != rv)
                    {
                        SkipSubtree();                                 // if this field isn't the target so just skip over the rest of it
                    }
                    else
                    {
                        break;
                    }
                }
                return(1 == _state);

            case 1:                     // we're already on a field
                rv = _pc.GetCapture();
                if (key == rv || okey == rv)
                {
                    return(true);
                }
                else if (!SkipSubtree())
                {
                    return(false);
                }

                while (Read() && 1 == _state)                         // first read will move to the child field of the root
                {
                    rv = _pc.GetCapture();
                    if (key != rv && okey != rv)
                    {
                        SkipSubtree();                                 // if this field isn't the target just skip over the rest of it
                    }
                    else
                    {
                        break;
                    }
                }
                return(1 == _state);

            default:
                return(false);
            }
        }