private unsafe int InternalReadChars(char[] buffer, int index, int count)
{
int num = 0;
int charCount = count;
if (this.m_charBytes == null)
{
this.m_charBytes = new byte[0x80];
}
while (charCount > 0)
{
int num3 = 0;
num = charCount;
UTF8Encoding.UTF8Decoder decoder = this.m_decoder as UTF8Encoding.UTF8Decoder;
if (((decoder != null) && decoder.HasState) && (num > 1))
{
num--;
}
if (this.m_2BytesPerChar)
{
num = num << 1;
}
if (num > 0x80)
{
num = 0x80;
}
int position = 0;
byte[] charBytes = null;
if (this.m_isMemoryStream)
{
MemoryStream stream = this.m_stream as MemoryStream;
position = stream.InternalGetPosition();
num = stream.InternalEmulateRead(num);
charBytes = stream.InternalGetBuffer();
}
else
{
num = this.m_stream.Read(this.m_charBytes, 0, num);
charBytes = this.m_charBytes;
}
if (num == 0)
{
return(count - charCount);
}
fixed(byte *numRef = charBytes)
{
fixed(char *chRef = buffer)
{
num3 = this.m_decoder.GetChars(numRef + position, num, chRef + index, charCount, false);
}
}
charCount -= num3;
index += num3;
}
return(count - charCount);
}
private int InternalReadChars(char[] buffer, int index, int count)
{
int charsRead = 0;
int numBytes = 0;
int charsRemaining = count;
if (m_charBytes == null)
{
m_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
if (m_2BytesPerChar)
{
numBytes <<= 1;
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
if (m_isMemoryStream)
{
MemoryStream mStream = m_stream as MemoryStream;
BCLDebug.Assert(mStream != null, "m_stream as MemoryStream != null");
int position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
if (numBytes == 0)
{
return(count - charsRemaining);
}
charsRead = m_decoder.GetChars(mStream.InternalGetBuffer(), position, numBytes, buffer, index);
}
else
{
numBytes = m_stream.Read(m_charBytes, 0, numBytes);
if (numBytes == 0)
{
// Console.WriteLine("Found no bytes. We're outta here.");
return(count - charsRemaining);
}
charsRead = m_decoder.GetChars(m_charBytes, 0, numBytes, buffer, index);
}
charsRemaining -= charsRead;
index += charsRead;
// Console.WriteLine("That became: " + charsRead + " characters.");
}
BCLDebug.Assert(charsRemaining == 0, "We didn't read all the chars we thought we would.");
return(count);
}
private unsafe int InternalReadChars(char[] buffer, int index, int count)
{
int charCount = count;
if (this.m_charBytes == null)
{
this.m_charBytes = new byte[128];
}
while (charCount > 0)
{
int count1 = charCount;
DecoderNLS decoderNls = this.m_decoder as DecoderNLS;
if (decoderNls != null && decoderNls.HasState && count1 > 1)
{
--count1;
}
if (this.m_2BytesPerChar)
{
count1 <<= 1;
}
if (count1 > 128)
{
count1 = 128;
}
int num = 0;
int byteCount;
byte[] numArray;
if (this.m_isMemoryStream)
{
MemoryStream memoryStream = this.m_stream as MemoryStream;
num = memoryStream.InternalGetPosition();
int count2 = count1;
byteCount = memoryStream.InternalEmulateRead(count2);
numArray = memoryStream.InternalGetBuffer();
}
else
{
byteCount = this.m_stream.Read(this.m_charBytes, 0, count1);
numArray = this.m_charBytes;
}
if (byteCount == 0)
{
return(count - charCount);
}
int chars;
fixed(byte *numPtr = numArray)
fixed(char *chPtr = buffer)
chars = this.m_decoder.GetChars(numPtr + num, byteCount, chPtr + index, charCount, false);
charCount -= chars;
index += chars;
}
return(count - charCount);
}
private int InternalReadChars(Span <char> buffer)
{
Debug.Assert(!_disposed);
int numBytes = 0;
int index = 0;
int charsRemaining = buffer.Length;
if (_charBytes == null)
{
_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
int charsRead = 0;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
if (_2BytesPerChar)
{
numBytes <<= 1;
}
// We do not want to read even a single byte more than necessary.
//
// Subtract pending bytes that the decoder may be holding onto. This assumes that each
// decoded char corresponds to one or more bytes. Note that custom encodings or encodings with
// a custom replacement sequence may violate this assumption.
if (numBytes > 1)
{
DecoderNLS?decoder = _decoder as DecoderNLS;
// For internal decoders, we can check whether the decoder has any pending state.
// For custom decoders, assume that the decoder has pending state.
if (decoder == null || decoder.HasState)
{
numBytes -= 1;
// The worst case is charsRemaining = 2 and UTF32Decoder holding onto 3 pending bytes. We need to read just
// one byte in this case.
if (_2BytesPerChar && numBytes > 2)
{
numBytes -= 2;
}
}
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
int position = 0;
byte[]? byteBuffer = null;
if (_isMemoryStream)
{
Debug.Assert(_stream is MemoryStream);
MemoryStream mStream = (MemoryStream)_stream;
position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = mStream.InternalGetBuffer();
}
else
{
numBytes = _stream.Read(_charBytes, 0, numBytes);
byteBuffer = _charBytes;
}
if (numBytes == 0)
{
return(buffer.Length - charsRemaining);
}
Debug.Assert(byteBuffer != null, "expected byteBuffer to be non-null");
checked
{
if (position < 0 || numBytes < 0 || position > byteBuffer.Length - numBytes)
{
throw new ArgumentOutOfRangeException(nameof(numBytes));
}
if (index < 0 || charsRemaining < 0 || index > buffer.Length - charsRemaining)
{
throw new ArgumentOutOfRangeException(nameof(charsRemaining));
}
unsafe
{
fixed(byte *pBytes = byteBuffer)
fixed(char *pChars = &MemoryMarshal.GetReference(buffer))
{
charsRead = _decoder.GetChars(pBytes + position, numBytes, pChars + index, charsRemaining, flush: false);
}
}
}
charsRemaining -= charsRead;
index += charsRead;
}
// this should never fail
Debug.Assert(charsRemaining >= 0, "We read too many characters.");
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(buffer.Length - charsRemaining);
}
private int InternalReadChars(Span <char> buffer)
{
Debug.Assert(!_disposed);
int totalCharsRead = 0;
while (!buffer.IsEmpty)
{
int numBytes = buffer.Length;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
if (_2BytesPerChar)
{
numBytes <<= 1;
}
// We do not want to read even a single byte more than necessary.
//
// Subtract pending bytes that the decoder may be holding onto. This assumes that each
// decoded char corresponds to one or more bytes. Note that custom encodings or encodings with
// a custom replacement sequence may violate this assumption.
if (numBytes > 1)
{
DecoderNLS?decoder = _decoder as DecoderNLS;
// For internal decoders, we can check whether the decoder has any pending state.
// For custom decoders, assume that the decoder has pending state.
if (decoder == null || decoder.HasState)
{
numBytes--;
// The worst case is charsRemaining = 2 and UTF32Decoder holding onto 3 pending bytes. We need to read just
// one byte in this case.
if (_2BytesPerChar && numBytes > 2)
{
numBytes -= 2;
}
}
}
ReadOnlySpan <byte> byteBuffer;
if (_isMemoryStream)
{
Debug.Assert(_stream is MemoryStream);
MemoryStream mStream = (MemoryStream)_stream;
int position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = new ReadOnlySpan <byte>(mStream.InternalGetBuffer(), position, numBytes);
}
else
{
_charBytes ??= new byte[MaxCharBytesSize];
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
numBytes = _stream.Read(_charBytes, 0, numBytes);
byteBuffer = new ReadOnlySpan <byte>(_charBytes, 0, numBytes);
}
if (byteBuffer.IsEmpty)
{
break;
}
int charsRead = _decoder.GetChars(byteBuffer, buffer, flush: false);
buffer = buffer.Slice(charsRead);
totalCharsRead += charsRead;
}
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(totalCharsRead);
}
private int InternalReadChars(char[] buffer, int index, int count)
{
Contract.Requires(buffer != null);
Contract.Requires(index >= 0 && count >= 0);
Contract.Assert(m_stream != null);
int numBytes = 0;
int charsRemaining = count;
if (m_charBytes == null)
{
m_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
int charsRead = 0;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
// special case for DecoderNLS subclasses when there is a hanging byte from the previous loop
DecoderNLS decoder = m_decoder as DecoderNLS;
if (decoder != null && decoder.HasState && numBytes > 1)
{
numBytes -= 1;
}
if (m_2BytesPerChar)
{
numBytes <<= 1;
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
int position = 0;
byte[] byteBuffer = null;
if (m_isMemoryStream)
{
MemoryStream mStream = m_stream as MemoryStream;
Contract.Assert(mStream != null, "m_stream as MemoryStream != null");
position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = mStream.InternalGetBuffer();
}
else
{
numBytes = m_stream.Read(m_charBytes, 0, numBytes);
byteBuffer = m_charBytes;
}
if (numBytes == 0)
{
return(count - charsRemaining);
}
Contract.Assert(byteBuffer != null, "expected byteBuffer to be non-null");
checked {
if (position < 0 || numBytes < 0 || position + numBytes > byteBuffer.Length)
{
throw new ArgumentOutOfRangeException("byteCount");
}
if (index < 0 || charsRemaining < 0 || index + charsRemaining > buffer.Length)
{
throw new ArgumentOutOfRangeException("charsRemaining");
}
unsafe
{
fixed(byte *pBytes = byteBuffer)
{
fixed(char *pChars = buffer)
{
charsRead = m_decoder.GetChars(pBytes + position, numBytes, pChars + index, charsRemaining, false);
}
}
}
}
charsRemaining -= charsRead;
index += charsRead;
}
// this should never fail
Contract.Assert(charsRemaining >= 0, "We read too many characters.");
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(count - charsRemaining);
}
private int InternalReadChars(Span <char> buffer)
{
Debug.Assert(!_disposed);
int numBytes = 0;
int index = 0;
int charsRemaining = buffer.Length;
if (_charBytes == null)
{
_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
int charsRead = 0;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
if (_2BytesPerChar)
{
numBytes <<= 1;
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
int position = 0;
byte[]? byteBuffer = null;
if (_isMemoryStream)
{
Debug.Assert(_stream is MemoryStream);
MemoryStream mStream = (MemoryStream)_stream;
position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = mStream.InternalGetBuffer();
}
else
{
numBytes = _stream.Read(_charBytes, 0, numBytes);
byteBuffer = _charBytes;
}
if (numBytes == 0)
{
return(buffer.Length - charsRemaining);
}
Debug.Assert(byteBuffer != null, "expected byteBuffer to be non-null");
checked
{
if (position < 0 || numBytes < 0 || position > byteBuffer.Length - numBytes)
{
throw new ArgumentOutOfRangeException(nameof(numBytes));
}
if (index < 0 || charsRemaining < 0 || index > buffer.Length - charsRemaining)
{
throw new ArgumentOutOfRangeException(nameof(charsRemaining));
}
unsafe
{
fixed(byte *pBytes = byteBuffer)
fixed(char *pChars = &MemoryMarshal.GetReference(buffer))
{
charsRead = _decoder.GetChars(pBytes + position, numBytes, pChars + index, charsRemaining, flush: false);
}
}
}
charsRemaining -= charsRead;
index += charsRead;
}
// this should never fail
Debug.Assert(charsRemaining >= 0, "We read too many characters.");
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(buffer.Length - charsRemaining);
}
private int InternalReadChars(char[] buffer, int index, int count)
{
Debug.Assert(buffer != null);
Debug.Assert(index >= 0 && count >= 0);
Debug.Assert(_stream != null);
int numBytes = 0;
int charsRemaining = count;
if (_charBytes == null)
{
_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
int charsRead = 0;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
if (_2BytesPerChar)
{
numBytes <<= 1;
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
int position = 0;
byte[] byteBuffer = null;
if (_isMemoryStream)
{
MemoryStream mStream = _stream as MemoryStream;
Debug.Assert(mStream != null, "_stream as MemoryStream != null");
position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = mStream.InternalGetBuffer();
}
else
{
numBytes = _stream.Read(_charBytes, 0, numBytes);
byteBuffer = _charBytes;
}
if (numBytes == 0)
{
return(count - charsRemaining);
}
Debug.Assert(byteBuffer != null, "expected byteBuffer to be non-null");
unsafe
{
fixed(byte *pBytes = byteBuffer)
fixed(char *pChars = buffer)
{
charsRead = _decoder.GetChars(byteBuffer, position, numBytes, buffer, index, false);
}
}
charsRemaining -= charsRead;
index += charsRead;
}
// this should never fail
Debug.Assert(charsRemaining >= 0, "We read too many characters.");
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(count - charsRemaining);
}
private int InternalReadChars(char[] buffer, int index, int count)
{
int numBytes = 0;
int charsRemaining = count;
if (m_charBytes == null)
{
m_charBytes = new byte[MaxCharBytesSize];
}
while (charsRemaining > 0)
{
int charsRead = 0;
// We really want to know what the minimum number of bytes per char
// is for our encoding. Otherwise for UnicodeEncoding we'd have to
// do ~1+log(n) reads to read n characters.
numBytes = charsRemaining;
// special case for DecoderNLS subclasses when there is a hanging byte from the previous loop
DecoderNLS decoder = m_decoder as DecoderNLS;
if (decoder != null && decoder.HasState && numBytes > 1)
{
numBytes -= 1;
}
if (m_2BytesPerChar)
{
numBytes <<= 1;
}
if (numBytes > MaxCharBytesSize)
{
numBytes = MaxCharBytesSize;
}
int position = 0;
byte[] byteBuffer = null;
if (m_isMemoryStream)
{
MemoryStream mStream = m_stream as MemoryStream;
position = mStream.InternalGetPosition();
numBytes = mStream.InternalEmulateRead(numBytes);
byteBuffer = mStream.InternalGetBuffer();
}
else
{
numBytes = m_stream.Read(m_charBytes, 0, numBytes);
byteBuffer = m_charBytes;
}
if (numBytes == 0)
{
return(count - charsRemaining);
}
unsafe
{
fixed(byte *pBytes = byteBuffer)
fixed(char *pChars = buffer)
{
charsRead = m_decoder.GetChars(pBytes + position, numBytes, pChars + index, charsRemaining, false);
}
}
charsRemaining -= charsRead;
index += charsRead;
}
// we may have read fewer than the number of characters requested if end of stream reached
// or if the encoding makes the char count too big for the buffer (e.g. fallback sequence)
return(count - charsRemaining);
}
private unsafe int InternalReadChars(char[] buffer, int index, int count)
{
int i = count;
if (this.m_charBytes == null)
{
this.m_charBytes = new byte[128];
}
while (i > 0)
{
int num = i;
DecoderNLS decoderNLS = this.m_decoder as DecoderNLS;
if (decoderNLS != null && decoderNLS.HasState && num > 1)
{
num--;
}
if (this.m_2BytesPerChar)
{
num <<= 1;
}
if (num > 128)
{
num = 128;
}
int num2 = 0;
byte[] array;
if (this.m_isMemoryStream)
{
MemoryStream memoryStream = this.m_stream as MemoryStream;
num2 = memoryStream.InternalGetPosition();
num = memoryStream.InternalEmulateRead(num);
array = memoryStream.InternalGetBuffer();
}
else
{
num = this.m_stream.Read(this.m_charBytes, 0, num);
array = this.m_charBytes;
}
if (num == 0)
{
return(count - i);
}
int chars;
checked
{
if (num2 < 0 || num < 0 || num2 + num > array.Length)
{
throw new ArgumentOutOfRangeException("byteCount");
}
if (index < 0 || i < 0 || index + i > buffer.Length)
{
throw new ArgumentOutOfRangeException("charsRemaining");
}
fixed(byte *ptr = array)
{
fixed(char *ptr2 = buffer)
{
chars = this.m_decoder.GetChars(ptr + num2, num, ptr2 + index, i, false);
}
}
}
i -= chars;
index += chars;
}
return(count - i);
}
