public void BackRewindsCounters()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
reader.Back();
AssertCounters(reader, 0, 0, 0);
}
public void CountersOnReadingSecondChar()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("ab"));
reader.Next();
reader.Next();
AssertCounters(reader, 2, 1, 2);
}
public void CountersOnReadingFirstChar()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
AssertCounters(reader, 1, 1, 1);
}
public void CountersOnReadingSecondChar()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("ab"));
reader.Next();
reader.Next();
AssertCounters(reader, 2, 1, 2);
}
public void BackRewindsCounters()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
reader.Back();
AssertCounters(reader, 0, 0, 0);
}
public JsonTextReader(TextReader reader)
{
if (reader == null)
throw new ArgumentNullException("reader");
_reader = new BufferedCharReader(reader);
Push(ParseMethod);
}
public void NextAfterBackRestoresCounters()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
reader.Back();
reader.Next();
AssertCounters(reader, 1, 1, 1);
}
public JsonTextReader(TextReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
_reader = new BufferedCharReader(reader);
Push(ParseMethod);
}
public void CountersWhenBackNextAroundLine()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("12\n34"));
reader.Next(); AssertCounters(reader, 1, 1, 1);
reader.Next(); AssertCounters(reader, 2, 1, 2);
reader.Next(); AssertCounters(reader, 3, 1, 3);
reader.Next(); AssertCounters(reader, 4, 2, 1);
reader.Back(); AssertCounters(reader, 3, 1, 3);
reader.Next(); AssertCounters(reader, 4, 2, 1);
}
public void BacktrackAfterEnding()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader(";"));
Assert.IsTrue(reader.More());
Assert.AreEqual(';', reader.Next());
Assert.IsFalse(reader.More());
reader.Back();
Assert.IsTrue(reader.More());
Assert.AreEqual(';', reader.Next());
Assert.IsFalse(reader.More());
}
private static char ParseHex(BufferedCharReader input, char[] hexDigits)
{
Debug.Assert(input != null);
Debug.Assert(hexDigits != null);
Debug.Assert(hexDigits.Length == 4);
hexDigits[0] = input.Next();
hexDigits[1] = input.Next();
hexDigits[2] = input.Next();
hexDigits[3] = input.Next();
return((char)ushort.Parse(new string(hexDigits), NumberStyles.HexNumber));
}
public void BacktrackAfterEnding()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader(";"));
Assert.IsTrue(reader.More());
Assert.AreEqual(';', reader.Next());
Assert.IsFalse(reader.More());
reader.Back();
Assert.IsTrue(reader.More());
Assert.AreEqual(';', reader.Next());
Assert.IsFalse(reader.More());
}
public void CountersUnaffectedWhenReadingPastEOF()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("abc"));
Assert.AreEqual('a', reader.Next());
Assert.AreEqual('b', reader.Next());
Assert.AreEqual('c', reader.Next());
Assert.IsFalse(reader.More());
Assert.AreEqual(0, reader.Next());
Assert.AreEqual(3, reader.CharCount, "CharCount");
Assert.AreEqual(1, reader.LineNumber, "LineNumber");
Assert.AreEqual(3, reader.LinePosition, "LinePosition");
}
public void CountersUnaffectedWhenReadingPastEOF()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("abc"));
Assert.AreEqual('a', reader.Next());
Assert.AreEqual('b', reader.Next());
Assert.AreEqual('c', reader.Next());
Assert.IsFalse(reader.More());
Assert.AreEqual(0, reader.Next());
Assert.AreEqual(3, reader.CharCount, "CharCount");
Assert.AreEqual(1, reader.LineNumber, "LineNumber");
Assert.AreEqual(3, reader.LinePosition, "LinePosition");
}
protected override JsonToken ReadTokenImpl()
{
if (_stack == null)
{
return(JsonToken.EOF());
}
if (_stack.Count == 0)
{
_stack = null;
_reader = null;
return(JsonToken.EOF());
}
return(Pop()());
}
public void LineNumberBumpsAndPositionResetsWithEachLF()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("\n1\n23\n456\n"));
AssertReadLineNumPos(reader, '\n', 1, 1);
AssertReadLineNumPos(reader, '1', 2, 1);
AssertReadLineNumPos(reader, '\n', 2, 2);
AssertReadLineNumPos(reader, '2', 3, 1);
AssertReadLineNumPos(reader, '3', 3, 2);
AssertReadLineNumPos(reader, '\n', 3, 3);
AssertReadLineNumPos(reader, '4', 4, 1);
AssertReadLineNumPos(reader, '5', 4, 2);
AssertReadLineNumPos(reader, '6', 4, 3);
AssertReadLineNumPos(reader, '\n', 4, 4);
AssertReadLineNumPos(reader, '\0', 4, 4);
}
/// <summary>
/// Reads the next token and returns it.
/// </summary>
protected override JsonToken ReadTokenImpl()
{
if (_stack == null)
{
return JsonToken.EOF();
}
else if (_stack.Count == 0)
{
_stack = null;
_reader = null;
return JsonToken.EOF();
}
else
{
return Pop()();
}
}
/// <summary>
/// Reads the next token and returns it.
/// </summary>
protected override JsonToken ReadTokenImpl()
{
if (_stack == null)
{
return(JsonToken.EOF());
}
else if (_stack.Count == 0)
{
_stack = null;
_endLineNumber = _reader.LineNumber;
_endLinePosition = _reader.LinePosition;
_endCharCount = _reader.CharCount;
_reader = null;
return(JsonToken.EOF());
}
else
{
return(Pop()());
}
}
public void CountersOnReadingFirstChar()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
AssertCounters(reader, 1, 1, 1);
}
/// <summary>
/// Return the characters up to the next close quote character.
/// Backslash processing is done. The formal JSON format does not
/// allow strings in single quotes, but an implementation is allowed to
/// accept them.
/// </summary>
/// <param name="quote">The quoting character, either " or '</param>
/// <returns>A String.</returns>
// TODO: Consider rendering Dequote public
internal static string Dequote(BufferedCharReader input, char quote)
{
return(Dequote(input, quote, null).ToString());
}
internal static StringBuilder Dequote(BufferedCharReader input, char quote, StringBuilder output)
{
Debug.Assert(input != null);
if (output == null)
{
output = new StringBuilder();
}
char[] hexDigits = null;
while (true)
{
char ch = input.Next();
if (ch == BufferedCharReader.EOF)
{
throw new FormatException("Unterminated string.");
}
if (ch == '\\')
{
ch = input.Next();
switch (ch)
{
case 'b': output.Append('\b'); break; // Backspace
case 't': output.Append('\t'); break; // Horizontal tab
case 'n': output.Append('\n'); break; // Newline
case 'f': output.Append('\f'); break; // Form feed
case 'r': output.Append('\r'); break; // Carriage return
case 'u':
{
if (hexDigits == null)
{
hexDigits = new char[4];
}
output.Append(ParseHex(input, hexDigits));
break;
}
default:
output.Append(ch);
break;
}
}
else
{
if (ch == quote)
{
return(output);
}
output.Append(ch);
}
}
}
private static void AssertReadLineNumPos(BufferedCharReader reader, char expected, int line, int pos)
{
Assert.AreEqual(expected, reader.Next(), "Read");
AssertLineCounters(reader, line, pos);
}
private static void AssertLineCounters(BufferedCharReader reader, int line, int pos)
{
Assert.AreEqual(line, reader.LineNumber, "LineNumber");
Assert.AreEqual(pos, reader.LinePosition, "LinePosition");
}
internal static StringBuilder Dequote(BufferedCharReader input, char quote, StringBuilder output)
{
Debug.Assert(input != null);
if (output == null)
output = new StringBuilder();
char[] hexDigits = null;
while (true)
{
char ch = input.Next();
if ((ch == BufferedCharReader.EOF) || (ch == '\n') || (ch == '\r'))
throw new FormatException("Unterminated string.");
if (ch == '\\')
{
ch = input.Next();
switch (ch)
{
case 'b': output.Append('\b'); break; // Backspace
case 't': output.Append('\t'); break; // Horizontal tab
case 'n': output.Append('\n'); break; // Newline
case 'f': output.Append('\f'); break; // Form feed
case 'r': output.Append('\r'); break; // Carriage return
case 'u':
{
if (hexDigits == null)
hexDigits = new char[4];
output.Append(ParseHex(input, hexDigits));
break;
}
default:
output.Append(ch);
break;
}
}
else
{
if (ch == quote)
return output;
output.Append(ch);
}
}
}
public void CountersWhenBackNextAroundLine()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("12\n34"));
reader.Next(); AssertCounters(reader, 1, 1, 1);
reader.Next(); AssertCounters(reader, 2, 1, 2);
reader.Next(); AssertCounters(reader, 3, 1, 3);
reader.Next(); AssertCounters(reader, 4, 2, 1);
reader.Back(); AssertCounters(reader, 3, 1, 3);
reader.Next(); AssertCounters(reader, 4, 2, 1);
}
public void LineNumberBumpsAndPositionResetsWithEachLF()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("\n1\n23\n456\n"));
AssertReadLineNumPos(reader, '\n', 1, 1);
AssertReadLineNumPos(reader, '1', 2, 1);
AssertReadLineNumPos(reader, '\n', 2, 2);
AssertReadLineNumPos(reader, '2', 3, 1);
AssertReadLineNumPos(reader, '3', 3, 2);
AssertReadLineNumPos(reader, '\n', 3, 3);
AssertReadLineNumPos(reader, '4', 4, 1);
AssertReadLineNumPos(reader, '5', 4, 2);
AssertReadLineNumPos(reader, '6', 4, 3);
AssertReadLineNumPos(reader, '\n', 4, 4);
AssertReadLineNumPos(reader, '\0', 4, 4);
}
public void InitialCounters()
{
BufferedCharReader reader = new BufferedCharReader(TextReader.Null);
AssertCounters(reader, 0, 0, 0);
}
private static void AssertReadLineNumPos(BufferedCharReader reader, char expected, int line, int pos)
{
Assert.AreEqual(expected, reader.Next(), "Read");
AssertLineCounters(reader, line, pos);
}
private static void AssertCounters(BufferedCharReader reader, int chars, int line, int pos)
{
Assert.AreEqual(chars, reader.CharCount, "CharCount");
AssertLineCounters(reader, line, pos);
}
internal static StringBuilder Dequote(BufferedCharReader input, char quote, StringBuilder output)
{
Debug.Assert(input != null);
if (output == null)
{
output = new StringBuilder();
}
char[] array = null;
while (true)
{
char c = input.Next();
switch (c)
{
case '\0':
throw new FormatException("Unterminated string.");
case '\\':
c = input.Next();
switch (c)
{
case 'b':
output.Append('\b');
break;
case 't':
output.Append('\t');
break;
case 'n':
output.Append('\n');
break;
case 'f':
output.Append('\f');
break;
case 'r':
output.Append('\r');
break;
case 'u':
if (array == null)
{
array = new char[4];
}
output.Append(ParseHex(input, array));
break;
default:
output.Append(c);
break;
}
break;
default:
if (c == quote)
{
return(output);
}
output.Append(c);
break;
}
}
}
/// <summary>
/// Reads the next token and returns it.
/// </summary>
protected override JsonToken ReadTokenImpl()
{
if (_stack == null)
{
return JsonToken.EOF();
}
else if (_stack.Count == 0)
{
_stack = null;
_endLineNumber = _reader.LineNumber;
_endLinePosition = _reader.LinePosition;
_endCharCount = _reader.CharCount;
_reader = null;
return JsonToken.EOF();
}
else
{
return Pop()();
}
}
public void NextAfterBackRestoresCounters()
{
BufferedCharReader reader = new BufferedCharReader(new StringReader("a"));
reader.Next();
reader.Back();
reader.Next();
AssertCounters(reader, 1, 1, 1);
}
private static void AssertCounters(BufferedCharReader reader, int chars, int line, int pos)
{
Assert.AreEqual(chars, reader.CharCount, "CharCount");
AssertLineCounters(reader, line, pos);
}
/// <summary>
/// Return the characters up to the next close quote character.
/// Backslash processing is done. The formal JSON format does not
/// allow strings in single quotes, but an implementation is allowed to
/// accept them.
/// </summary>
/// <param name="quote">The quoting character, either " or '</param>
/// <returns>A String.</returns>
// TODO: Consider rendering Dequote public
internal static string Dequote(BufferedCharReader input, char quote)
{
return Dequote(input, quote, null).ToString();
}
private static void AssertLineCounters(BufferedCharReader reader, int line, int pos)
{
Assert.AreEqual(line, reader.LineNumber, "LineNumber");
Assert.AreEqual(pos, reader.LinePosition, "LinePosition");
}
/// <summary>
/// Eats the next four characters, assuming hex digits, and converts
/// into the represented character value.
/// </summary>
/// <returns>The parsed character.</returns>
private static char ParseHex(BufferedCharReader input, char[] hexDigits)
{
Debug.Assert(input != null);
Debug.Assert(hexDigits != null);
Debug.Assert(hexDigits.Length == 4);
hexDigits[0] = input.Next();
hexDigits[1] = input.Next();
hexDigits[2] = input.Next();
hexDigits[3] = input.Next();
return (char) ushort.Parse(new string(hexDigits), NumberStyles.HexNumber);
}
public void InitialCounters()
{
BufferedCharReader reader = new BufferedCharReader(TextReader.Null);
AssertCounters(reader, 0, 0, 0);
}
