public int GetCharEntity(int offset, int length)
{
if (length < 3)
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
byte[] buffer = _buffer;
DiagnosticUtility.DebugAssert(buffer[offset] == '&', "");
DiagnosticUtility.DebugAssert(buffer[offset + length - 1] == ';', "");
switch (buffer[offset + 1])
{
case (byte)'l':
return(GetLessThanCharEntity(offset, length));
case (byte)'g':
return(GetGreaterThanCharEntity(offset, length));
case (byte)'a':
if (buffer[offset + 2] == (byte)'m')
{
return(GetAmpersandCharEntity(offset, length));
}
else
{
return(GetApostropheCharEntity(offset, length));
}
case (byte)'q':
return(GetQuoteCharEntity(offset, length));
case (byte)'#':
if (buffer[offset + 2] == (byte)'x')
{
return(GetHexCharEntity(offset, length));
}
else
{
return(GetDecimalCharEntity(offset, length));
}
default:
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
return(0);
}
}
static public UInt64 ToUInt64(string value)
{
try
{
return(ulong.Parse(value, NumberStyles.Any, NumberFormatInfo.InvariantInfo));
}
catch (ArgumentException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "UInt64", exception));
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "UInt64", exception));
}
catch (OverflowException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "UInt64", exception));
}
}
static public Guid ToGuid(string value)
{
try
{
return(new Guid(Trim(value)));
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "Guid", exception));
}
catch (ArgumentException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "Guid", exception));
}
catch (OverflowException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "Guid", exception));
}
}
static public TimeSpan ToTimeSpan(string value)
{
try
{
return(XmlConvert.ToTimeSpan(value));
}
catch (ArgumentException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "TimeSpan", exception));
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "TimeSpan", exception));
}
catch (OverflowException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value, "TimeSpan", exception));
}
}
public XmlDictionaryString GetDictionaryString(int key)
{
IXmlDictionary keyDictionary;
if ((key & 1) != 0)
{
keyDictionary = _session;
}
else
{
keyDictionary = _dictionary;
}
XmlDictionaryString s;
if (!keyDictionary.TryLookup(key >> 1, out s))
{
XmlExceptionHelper.ThrowInvalidBinaryFormat(_reader);
}
return(s);
}
public int ReadDictionaryKey()
{
int key = ReadMultiByteUInt31();
if ((key & 1) != 0)
{
if (_session == null)
{
XmlExceptionHelper.ThrowInvalidBinaryFormat(_reader);
}
int sessionKey = (key >> 1);
XmlDictionaryString xmlString;
if (!_session.TryLookup(sessionKey, out xmlString))
{
if (sessionKey < XmlDictionaryString.MinKey || sessionKey > XmlDictionaryString.MaxKey)
{
XmlExceptionHelper.ThrowXmlDictionaryStringIDOutOfRange(_reader);
}
XmlExceptionHelper.ThrowXmlDictionaryStringIDUndefinedSession(_reader, sessionKey);
}
}
else
{
if (_dictionary == null)
{
XmlExceptionHelper.ThrowInvalidBinaryFormat(_reader);
}
int staticKey = (key >> 1);
XmlDictionaryString xmlString;
if (!_dictionary.TryLookup(staticKey, out xmlString))
{
if (staticKey < XmlDictionaryString.MinKey || staticKey > XmlDictionaryString.MaxKey)
{
XmlExceptionHelper.ThrowXmlDictionaryStringIDOutOfRange(_reader);
}
XmlExceptionHelper.ThrowXmlDictionaryStringIDUndefinedStatic(_reader, staticKey);
}
}
return(key);
}
public TimeSpan ReadTimeSpan()
{
long value = 0;
try
{
value = ReadInt64();
return(TimeSpan.FromTicks(value));
}
catch (ArgumentException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "TimeSpan", exception));
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "TimeSpan", exception));
}
catch (OverflowException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "TimeSpan", exception));
}
}
public DateTime ReadDateTime()
{
long value = 0;
try
{
value = ReadInt64();
return(DateTime.FromBinary(value));
}
catch (ArgumentException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "DateTime", exception));
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "DateTime", exception));
}
catch (OverflowException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateConversionException(value.ToString(CultureInfo.InvariantCulture), "DateTime", exception));
}
}
private int GetHexCharEntity(int offset, int length)
{
byte[] buffer = _buffer;
DiagnosticUtility.DebugAssert(buffer[offset + 0] == '&', "");
DiagnosticUtility.DebugAssert(buffer[offset + 1] == '#', "");
DiagnosticUtility.DebugAssert(buffer[offset + 2] == 'x', "");
DiagnosticUtility.DebugAssert(buffer[offset + length - 1] == ';', "");
int value = 0;
for (int i = 3; i < length - 1; i++)
{
byte ch = buffer[offset + i];
int digit = 0;
if (ch >= '0' && ch <= '9')
{
digit = (ch - '0');
}
else if (ch >= 'a' && ch <= 'f')
{
digit = 10 + (ch - 'a');
}
else if (ch >= 'A' && ch <= 'F')
{
digit = 10 + (ch - 'A');
}
else
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
DiagnosticUtility.DebugAssert(digit >= 0 && digit < 16, "");
value = value * 16 + digit;
if (value > SurrogateChar.MaxValue)
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
}
return(value);
}
private int GetDecimalCharEntity(int offset, int length)
{
byte[] buffer = _buffer;
DiagnosticUtility.DebugAssert(buffer[offset + 0] == '&', "");
DiagnosticUtility.DebugAssert(buffer[offset + 1] == '#', "");
DiagnosticUtility.DebugAssert(buffer[offset + length - 1] == ';', "");
int value = 0;
for (int i = 2; i < length - 1; i++)
{
byte ch = buffer[offset + i];
if (ch < (byte)'0' || ch > (byte)'9')
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
value = value * 10 + (ch - '0');
if (value > SurrogateChar.MaxValue)
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
}
return(value);
}
public void ReadValue(XmlBinaryNodeType nodeType, ValueHandle value)
{
switch (nodeType)
{
case XmlBinaryNodeType.EmptyText:
value.SetValue(ValueHandleType.Empty);
break;
case XmlBinaryNodeType.ZeroText:
value.SetValue(ValueHandleType.Zero);
break;
case XmlBinaryNodeType.OneText:
value.SetValue(ValueHandleType.One);
break;
case XmlBinaryNodeType.TrueText:
value.SetValue(ValueHandleType.True);
break;
case XmlBinaryNodeType.FalseText:
value.SetValue(ValueHandleType.False);
break;
case XmlBinaryNodeType.BoolText:
value.SetValue(ReadUInt8() != 0 ? ValueHandleType.True : ValueHandleType.False);
break;
case XmlBinaryNodeType.Chars8Text:
ReadValue(value, ValueHandleType.UTF8, ReadUInt8());
break;
case XmlBinaryNodeType.Chars16Text:
ReadValue(value, ValueHandleType.UTF8, ReadUInt16());
break;
case XmlBinaryNodeType.Chars32Text:
ReadValue(value, ValueHandleType.UTF8, ReadUInt31());
break;
case XmlBinaryNodeType.UnicodeChars8Text:
ReadUnicodeValue(value, ReadUInt8());
break;
case XmlBinaryNodeType.UnicodeChars16Text:
ReadUnicodeValue(value, ReadUInt16());
break;
case XmlBinaryNodeType.UnicodeChars32Text:
ReadUnicodeValue(value, ReadUInt31());
break;
case XmlBinaryNodeType.Bytes8Text:
ReadValue(value, ValueHandleType.Base64, ReadUInt8());
break;
case XmlBinaryNodeType.Bytes16Text:
ReadValue(value, ValueHandleType.Base64, ReadUInt16());
break;
case XmlBinaryNodeType.Bytes32Text:
ReadValue(value, ValueHandleType.Base64, ReadUInt31());
break;
case XmlBinaryNodeType.DictionaryText:
value.SetDictionaryValue(ReadDictionaryKey());
break;
case XmlBinaryNodeType.UniqueIdText:
ReadValue(value, ValueHandleType.UniqueId, ValueHandleLength.UniqueId);
break;
case XmlBinaryNodeType.GuidText:
ReadValue(value, ValueHandleType.Guid, ValueHandleLength.Guid);
break;
case XmlBinaryNodeType.DecimalText:
ReadValue(value, ValueHandleType.Decimal, ValueHandleLength.Decimal);
break;
case XmlBinaryNodeType.Int8Text:
ReadValue(value, ValueHandleType.Int8, ValueHandleLength.Int8);
break;
case XmlBinaryNodeType.Int16Text:
ReadValue(value, ValueHandleType.Int16, ValueHandleLength.Int16);
break;
case XmlBinaryNodeType.Int32Text:
ReadValue(value, ValueHandleType.Int32, ValueHandleLength.Int32);
break;
case XmlBinaryNodeType.Int64Text:
ReadValue(value, ValueHandleType.Int64, ValueHandleLength.Int64);
break;
case XmlBinaryNodeType.UInt64Text:
ReadValue(value, ValueHandleType.UInt64, ValueHandleLength.UInt64);
break;
case XmlBinaryNodeType.FloatText:
ReadValue(value, ValueHandleType.Single, ValueHandleLength.Single);
break;
case XmlBinaryNodeType.DoubleText:
ReadValue(value, ValueHandleType.Double, ValueHandleLength.Double);
break;
case XmlBinaryNodeType.TimeSpanText:
ReadValue(value, ValueHandleType.TimeSpan, ValueHandleLength.TimeSpan);
break;
case XmlBinaryNodeType.DateTimeText:
ReadValue(value, ValueHandleType.DateTime, ValueHandleLength.DateTime);
break;
case XmlBinaryNodeType.StartListText:
ReadList(value);
break;
case XmlBinaryNodeType.QNameDictionaryText:
ReadQName(value);
break;
default:
XmlExceptionHelper.ThrowInvalidBinaryFormat(_reader);
break;
}
}
public bool TryReadChars(char[] chars, int offset, int count, out int actual)
{
DiagnosticUtility.DebugAssert(offset + count <= chars.Length, string.Format("offset '{0}' + count '{1}' MUST BE <= chars.Length '{2}'", offset, count, chars.Length));
if (_type == ValueHandleType.Unicode)
{
return(TryReadUnicodeChars(chars, offset, count, out actual));
}
if (_type != ValueHandleType.UTF8)
{
actual = 0;
return(false);
}
int charOffset = offset;
int charCount = count;
byte[] bytes = _bufferReader.Buffer;
int byteOffset = _offset;
int byteCount = _length;
bool insufficientSpaceInCharsArray = false;
while (true)
{
while (charCount > 0 && byteCount > 0)
{
// fast path for codepoints U+0000 - U+007F
byte b = bytes[byteOffset];
if (b >= 0x80)
{
break;
}
chars[charOffset] = (char)b;
byteOffset++;
byteCount--;
charOffset++;
charCount--;
}
if (charCount == 0 || byteCount == 0 || insufficientSpaceInCharsArray)
{
break;
}
int actualByteCount;
int actualCharCount;
UTF8Encoding encoding = new UTF8Encoding(false, true);
try
{
// If we're asking for more than are possibly available, or more than are truly available then we can return the entire thing
if (charCount >= encoding.GetMaxCharCount(byteCount) || charCount >= encoding.GetCharCount(bytes, byteOffset, byteCount))
{
actualCharCount = encoding.GetChars(bytes, byteOffset, byteCount, chars, charOffset);
actualByteCount = byteCount;
}
else
{
Decoder decoder = encoding.GetDecoder();
// Since x bytes can never generate more than x characters this is a safe estimate as to what will fit
actualByteCount = Math.Min(charCount, byteCount);
// We use a decoder so we don't error if we fall across a character boundary
actualCharCount = decoder.GetChars(bytes, byteOffset, actualByteCount, chars, charOffset);
// We might've gotten zero characters though if < 4 bytes were requested because
// codepoints from U+0000 - U+FFFF can be up to 3 bytes in UTF-8, and represented as ONE char
// codepoints from U+10000 - U+10FFFF (last Unicode codepoint representable in UTF-8) are represented by up to 4 bytes in UTF-8
// and represented as TWO chars (high+low surrogate)
// (e.g. 1 char requested, 1 char in the buffer represented in 3 bytes)
while (actualCharCount == 0)
{
// Note the by the time we arrive here, if actualByteCount == 3, the next decoder.GetChars() call will read the 4th byte
// if we don't bail out since the while loop will advance actualByteCount only after reading the byte.
if (actualByteCount >= 3 && charCount < 2)
{
// If we reach here, it means that we're:
// - trying to decode more than 3 bytes and,
// - there is only one char left of charCount where we're stuffing decoded characters.
// In this case, we need to back off since decoding > 3 bytes in UTF-8 means that we will get 2 16-bit chars
// (a high surrogate and a low surrogate) - the Decoder will attempt to provide both at once
// and an ArgumentException will be thrown complaining that there's not enough space in the output char array.
// actualByteCount = 0 when the while loop is broken out of; decoder goes out of scope so its state no longer matters
insufficientSpaceInCharsArray = true;
break;
}
else
{
DiagnosticUtility.DebugAssert(byteOffset + actualByteCount < bytes.Length,
string.Format("byteOffset {0} + actualByteCount {1} MUST BE < bytes.Length {2}", byteOffset, actualByteCount, bytes.Length));
// Request a few more bytes to get at least one character
actualCharCount = decoder.GetChars(bytes, byteOffset + actualByteCount, 1, chars, charOffset);
actualByteCount++;
}
}
// Now that we actually retrieved some characters, figure out how many bytes it actually was
actualByteCount = encoding.GetByteCount(chars, charOffset, actualCharCount);
}
}
catch (FormatException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlExceptionHelper.CreateEncodingException(bytes, byteOffset, byteCount, exception));
}
// Advance
byteOffset += actualByteCount;
byteCount -= actualByteCount;
charOffset += actualCharCount;
charCount -= actualCharCount;
}
_offset = byteOffset;
_length = byteCount;
actual = (count - charCount);
return(true);
}
