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Diffstat (limited to 'Assets/ThirdParty/LitJson/JsonReader.cs')
| -rw-r--r-- | Assets/ThirdParty/LitJson/JsonReader.cs | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/Assets/ThirdParty/LitJson/JsonReader.cs b/Assets/ThirdParty/LitJson/JsonReader.cs new file mode 100644 index 00000000..e47eabc5 --- /dev/null +++ b/Assets/ThirdParty/LitJson/JsonReader.cs @@ -0,0 +1,478 @@ +#region Header +/** + * JsonReader.cs + * Stream-like access to JSON text. + * + * The authors disclaim copyright to this source code. For more details, see + * the COPYING file included with this distribution. + **/ +#endregion + + +using System; +using System.Collections.Generic; +using System.Globalization; +using System.IO; +using System.Text; + + +namespace LitJson +{ + public enum JsonToken + { + None, + + ObjectStart, + PropertyName, + ObjectEnd, + + ArrayStart, + ArrayEnd, + + Int, + Long, + Double, + + String, + + Boolean, + Null + } + + + public class JsonReader + { + #region Fields + private static readonly IDictionary<int, IDictionary<int, int[]>> parse_table; + + private Stack<int> automaton_stack; + private int current_input; + private int current_symbol; + private bool end_of_json; + private bool end_of_input; + private Lexer lexer; + private bool parser_in_string; + private bool parser_return; + private bool read_started; + private TextReader reader; + private bool reader_is_owned; + private bool skip_non_members; + private object token_value; + private JsonToken token; + #endregion + + + #region Public Properties + public bool AllowComments { + get { return lexer.AllowComments; } + set { lexer.AllowComments = value; } + } + + public bool AllowSingleQuotedStrings { + get { return lexer.AllowSingleQuotedStrings; } + set { lexer.AllowSingleQuotedStrings = value; } + } + + public bool SkipNonMembers { + get { return skip_non_members; } + set { skip_non_members = value; } + } + + public bool EndOfInput { + get { return end_of_input; } + } + + public bool EndOfJson { + get { return end_of_json; } + } + + public JsonToken Token { + get { return token; } + } + + public object Value { + get { return token_value; } + } + #endregion + + + #region Constructors + static JsonReader () + { + parse_table = PopulateParseTable (); + } + + public JsonReader (string json_text) : + this (new StringReader (json_text), true) + { + } + + public JsonReader (TextReader reader) : + this (reader, false) + { + } + + private JsonReader (TextReader reader, bool owned) + { + if (reader == null) + throw new ArgumentNullException ("reader"); + + parser_in_string = false; + parser_return = false; + + read_started = false; + automaton_stack = new Stack<int> (); + automaton_stack.Push ((int) ParserToken.End); + automaton_stack.Push ((int) ParserToken.Text); + + lexer = new Lexer (reader); + + end_of_input = false; + end_of_json = false; + + skip_non_members = true; + + this.reader = reader; + reader_is_owned = owned; + } + #endregion + + + #region Static Methods + private static IDictionary<int, IDictionary<int, int[]>> PopulateParseTable () + { + // See section A.2. of the manual for details + IDictionary<int, IDictionary<int, int[]>> parse_table = new Dictionary<int, IDictionary<int, int[]>> (); + + TableAddRow (parse_table, ParserToken.Array); + TableAddCol (parse_table, ParserToken.Array, '[', + '[', + (int) ParserToken.ArrayPrime); + + TableAddRow (parse_table, ParserToken.ArrayPrime); + TableAddCol (parse_table, ParserToken.ArrayPrime, '"', + (int) ParserToken.Value, + + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, '[', + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, ']', + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, '{', + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, (int) ParserToken.Number, + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, (int) ParserToken.True, + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, (int) ParserToken.False, + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + TableAddCol (parse_table, ParserToken.ArrayPrime, (int) ParserToken.Null, + (int) ParserToken.Value, + (int) ParserToken.ValueRest, + ']'); + + TableAddRow (parse_table, ParserToken.Object); + TableAddCol (parse_table, ParserToken.Object, '{', + '{', + (int) ParserToken.ObjectPrime); + + TableAddRow (parse_table, ParserToken.ObjectPrime); + TableAddCol (parse_table, ParserToken.ObjectPrime, '"', + (int) ParserToken.Pair, + (int) ParserToken.PairRest, + '}'); + TableAddCol (parse_table, ParserToken.ObjectPrime, '}', + '}'); + + TableAddRow (parse_table, ParserToken.Pair); + TableAddCol (parse_table, ParserToken.Pair, '"', + (int) ParserToken.String, + ':', + (int) ParserToken.Value); + + TableAddRow (parse_table, ParserToken.PairRest); + TableAddCol (parse_table, ParserToken.PairRest, ',', + ',', + (int) ParserToken.Pair, + (int) ParserToken.PairRest); + TableAddCol (parse_table, ParserToken.PairRest, '}', + (int) ParserToken.Epsilon); + + TableAddRow (parse_table, ParserToken.String); + TableAddCol (parse_table, ParserToken.String, '"', + '"', + (int) ParserToken.CharSeq, + '"'); + + TableAddRow (parse_table, ParserToken.Text); + TableAddCol (parse_table, ParserToken.Text, '[', + (int) ParserToken.Array); + TableAddCol (parse_table, ParserToken.Text, '{', + (int) ParserToken.Object); + + TableAddRow (parse_table, ParserToken.Value); + TableAddCol (parse_table, ParserToken.Value, '"', + (int) ParserToken.String); + TableAddCol (parse_table, ParserToken.Value, '[', + (int) ParserToken.Array); + TableAddCol (parse_table, ParserToken.Value, '{', + (int) ParserToken.Object); + TableAddCol (parse_table, ParserToken.Value, (int) ParserToken.Number, + (int) ParserToken.Number); + TableAddCol (parse_table, ParserToken.Value, (int) ParserToken.True, + (int) ParserToken.True); + TableAddCol (parse_table, ParserToken.Value, (int) ParserToken.False, + (int) ParserToken.False); + TableAddCol (parse_table, ParserToken.Value, (int) ParserToken.Null, + (int) ParserToken.Null); + + TableAddRow (parse_table, ParserToken.ValueRest); + TableAddCol (parse_table, ParserToken.ValueRest, ',', + ',', + (int) ParserToken.Value, + (int) ParserToken.ValueRest); + TableAddCol (parse_table, ParserToken.ValueRest, ']', + (int) ParserToken.Epsilon); + + return parse_table; + } + + private static void TableAddCol (IDictionary<int, IDictionary<int, int[]>> parse_table, ParserToken row, int col, + params int[] symbols) + { + parse_table[(int) row].Add (col, symbols); + } + + private static void TableAddRow (IDictionary<int, IDictionary<int, int[]>> parse_table, ParserToken rule) + { + parse_table.Add ((int) rule, new Dictionary<int, int[]> ()); + } + #endregion + + + #region Private Methods + private void ProcessNumber (string number) + { + if (number.IndexOf ('.') != -1 || + number.IndexOf ('e') != -1 || + number.IndexOf ('E') != -1) { + + double n_double; + if (double.TryParse (number, NumberStyles.Any, CultureInfo.InvariantCulture, out n_double)) { + token = JsonToken.Double; + token_value = n_double; + + return; + } + } + + int n_int32; + if (int.TryParse (number, NumberStyles.Integer, CultureInfo.InvariantCulture, out n_int32)) { + token = JsonToken.Int; + token_value = n_int32; + + return; + } + + long n_int64; + if (long.TryParse (number, NumberStyles.Integer, CultureInfo.InvariantCulture, out n_int64)) { + token = JsonToken.Long; + token_value = n_int64; + + return; + } + + ulong n_uint64; + if (ulong.TryParse(number, NumberStyles.Integer, CultureInfo.InvariantCulture, out n_uint64)) + { + token = JsonToken.Long; + token_value = n_uint64; + + return; + } + + // Shouldn't happen, but just in case, return something + token = JsonToken.Int; + token_value = 0; + } + + private void ProcessSymbol () + { + if (current_symbol == '[') { + token = JsonToken.ArrayStart; + parser_return = true; + + } else if (current_symbol == ']') { + token = JsonToken.ArrayEnd; + parser_return = true; + + } else if (current_symbol == '{') { + token = JsonToken.ObjectStart; + parser_return = true; + + } else if (current_symbol == '}') { + token = JsonToken.ObjectEnd; + parser_return = true; + + } else if (current_symbol == '"') { + if (parser_in_string) { + parser_in_string = false; + + parser_return = true; + + } else { + if (token == JsonToken.None) + token = JsonToken.String; + + parser_in_string = true; + } + + } else if (current_symbol == (int) ParserToken.CharSeq) { + token_value = lexer.StringValue; + + } else if (current_symbol == (int) ParserToken.False) { + token = JsonToken.Boolean; + token_value = false; + parser_return = true; + + } else if (current_symbol == (int) ParserToken.Null) { + token = JsonToken.Null; + parser_return = true; + + } else if (current_symbol == (int) ParserToken.Number) { + ProcessNumber (lexer.StringValue); + + parser_return = true; + + } else if (current_symbol == (int) ParserToken.Pair) { + token = JsonToken.PropertyName; + + } else if (current_symbol == (int) ParserToken.True) { + token = JsonToken.Boolean; + token_value = true; + parser_return = true; + + } + } + + private bool ReadToken () + { + if (end_of_input) + return false; + + lexer.NextToken (); + + if (lexer.EndOfInput) { + Close (); + + return false; + } + + current_input = lexer.Token; + + return true; + } + #endregion + + + public void Close () + { + if (end_of_input) + return; + + end_of_input = true; + end_of_json = true; + + if (reader_is_owned) + { + using(reader){} + } + + reader = null; + } + + public bool Read () + { + if (end_of_input) + return false; + + if (end_of_json) { + end_of_json = false; + automaton_stack.Clear (); + automaton_stack.Push ((int) ParserToken.End); + automaton_stack.Push ((int) ParserToken.Text); + } + + parser_in_string = false; + parser_return = false; + + token = JsonToken.None; + token_value = null; + + if (! read_started) { + read_started = true; + + if (! ReadToken ()) + return false; + } + + + int[] entry_symbols; + + while (true) { + if (parser_return) { + if (automaton_stack.Peek () == (int) ParserToken.End) + end_of_json = true; + + return true; + } + + current_symbol = automaton_stack.Pop (); + + ProcessSymbol (); + + if (current_symbol == current_input) { + if (! ReadToken ()) { + if (automaton_stack.Peek () != (int) ParserToken.End) + throw new JsonException ( + "Input doesn't evaluate to proper JSON text"); + + if (parser_return) + return true; + + return false; + } + + continue; + } + + try { + + entry_symbols = + parse_table[current_symbol][current_input]; + + } catch (KeyNotFoundException e) { + throw new JsonException ((ParserToken) current_input, e); + } + + if (entry_symbols[0] == (int) ParserToken.Epsilon) + continue; + + for (int i = entry_symbols.Length - 1; i >= 0; i--) + automaton_stack.Push (entry_symbols[i]); + } + } + + } +} |