コード例 #1
0
ファイル: SimpleJSON.cs プロジェクト: ly774508966/framework-2
        public static JSONNode Parse(string aJSON)
        {
            Stack <JSONNode> stack = new Stack <JSONNode>();
            JSONNode         ctx   = null;
            int    i         = 0;
            var    Token     = new StringBuilder(32);
            string TokenName = "";
            bool   QuoteMode = false;

            while (i < aJSON.Length)
            {
                switch (aJSON[i])
                {
                case '{':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                        break;
                    }
                    stack.Push(new JSONClass());
                    if (ctx != null)
                    {
                        TokenName = TokenName.Trim();
                        if (ctx is JSONArray)
                        {
                            ctx.Add(stack.Peek());
                        }
                        else if (TokenName != "")
                        {
                            ctx.Add(TokenName, stack.Peek());
                        }
                    }
                    TokenName    = "";
                    Token.Length = 0;
                    ctx          = stack.Peek();
                    break;

                case '[':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                        break;
                    }

                    stack.Push(new JSONArray());
                    if (ctx != null)
                    {
                        TokenName = TokenName.Trim();
                        if (ctx is JSONArray)
                        {
                            ctx.Add(stack.Peek());
                        }
                        else if (TokenName != "")
                        {
                            ctx.Add(TokenName, stack.Peek());
                        }
                    }
                    TokenName    = "";
                    Token.Length = 0;
                    ctx          = stack.Peek();
                    break;

                case '}':
                case ']':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                        break;
                    }
                    if (stack.Count == 0)
                    {
                        throw new Exception("JSON Parse: Too many closing brackets");
                    }

                    stack.Pop();
                    if (Token.Length != 0)
                    {
                        TokenName = TokenName.Trim();
                        if (ctx is JSONArray)
                        {
                            ctx.Add(Token.ToString());
                        }
                        else if (TokenName != "")
                        {
                            ctx.Add(TokenName, Token.ToString());
                        }
                    }
                    TokenName    = "";
                    Token.Length = 0;
                    if (stack.Count > 0)
                    {
                        ctx = stack.Peek();
                    }
                    break;

                case ':':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                        break;
                    }
                    TokenName    = Token.ToString();
                    Token.Length = 0;
                    break;

                case '"':
                    QuoteMode ^= true;
                    break;

                case ',':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                        break;
                    }
                    if (Token.Length != 0)
                    {
                        if (ctx is JSONArray)
                        {
                            ctx.Add(Token.ToString());
                        }
                        else if (TokenName != "")
                        {
                            ctx.Add(TokenName, Token.ToString());
                        }
                    }
                    TokenName    = "";
                    Token.Length = 0;
                    break;

                case '\r':
                case '\n':
                    break;

                case ' ':
                case '\t':
                    if (QuoteMode)
                    {
                        Token.Append(aJSON[i]);
                    }
                    break;

                case '\\':
                    ++i;
                    if (QuoteMode)
                    {
                        char C = aJSON[i];
                        switch (C)
                        {
                        case 't': Token.Append('\t'); break;

                        case 'r': Token.Append('\r'); break;

                        case 'n': Token.Append('\n'); break;

                        case 'b': Token.Append('\b'); break;

                        case 'f': Token.Append('\f'); break;

                        case 'u':
                        {
                            string s = aJSON.Substring(i + 1, 4);
                            Token.Append((char)int.Parse(s, System.Globalization.NumberStyles.AllowHexSpecifier));
                            i += 4;
                            break;
                        }

                        default: Token.Append(C); break;
                        }
                    }
                    break;

                default:
                    Token.Append(aJSON[i]);
                    break;
                }
                ++i;
            }
            if (QuoteMode)
            {
                throw new Exception("JSON Parse: Quotation marks seems to be messed up.");
            }
            return(ctx);
        }