public override int GetByteCount(char[] chars, int index, int count)
{
int result;
try
{
result = isoEncoding.GetEncoder().GetByteCount(chars, index, count, true);
}
catch (EncoderFallbackException)
{
result = defaultEncoding.GetEncoder().GetByteCount(chars, index, count, true);
}
return(result);
}
// Protected default constructor that sets the output stream
// to a null stream (a bit bucket).
protected BinaryWriter()
{
OutStream = Stream.Null;
_buffer = new byte[16];
_encoding = EncodingCache.UTF8NoBOM;
_encoder = _encoding.GetEncoder();
}
/// <summary>
/// Encodes a URL, like System.Web.HttpUtility.UrlEncode
/// </summary>
/// <returns>The encoded URL</returns>
/// <param name="value">The URL fragment to encode</param>
/// <param name="encoding">The encoding to use</param>
public static string UrlEncode(string value, System.Text.Encoding encoding = null, string spacevalue = "+")
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
encoding = encoding ?? System.Text.Encoding.UTF8;
var encoder = encoding.GetEncoder();
var inbuf = new char[1];
var outbuf = new byte[4];
return(RE_ESCAPECHAR.Replace(value, (m) =>
{
if (m.Value == " ")
{
return spacevalue;
}
inbuf[0] = m.Value[0];
try
{
var len = encoder.GetBytes(inbuf, 0, 1, outbuf, 0, true);
return "%" + BitConverter.ToString(outbuf, 0, len).Replace("-", "%");
}
catch
{
}
//Fallback
return m.Value;
}));
}
// Protected default constructor that sets the output stream
// to a null stream (a bit bucket).
protected BinaryWriter()
{
OutStream = Stream.Null;
_buffer = new byte[16];
_encoding = new UTF8Encoding(false, true);
_encoder = _encoding.GetEncoder();
}
private void Init(Stream stream, System.Text.Encoding encoding, int bufferSize)
{
this.stream = stream;
this.encoding = encoding;
this.encoder = encoding.GetEncoder();
if (bufferSize < 0x80)
{
bufferSize = 0x80;
}
this.charBuffer = new char[bufferSize];
this.byteBuffer = new byte[encoding.GetMaxByteCount(bufferSize)];
this.charLen = bufferSize;
if (stream.CanSeek && (stream.Position > 0L))
{
this.haveWrittenPreamble = true;
}
this.closable = true;
if (Mda.StreamWriterBufferedDataLost.Enabled)
{
string cs = null;
if (Mda.StreamWriterBufferedDataLost.CaptureAllocatedCallStack)
{
cs = Environment.GetStackTrace(null, false);
}
this.mdaHelper = new MdaHelper(this, cs);
}
}
public HttpResponseStreamWriter(Stream stream, Encoding encoding, int bufferSize)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanWrite)
{
throw new ArgumentException(Resources.HttpResponseStreamWriter_StreamNotWritable, nameof(stream));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
_stream = stream;
Encoding = encoding;
_charBufferSize = bufferSize;
if (bufferSize < MinBufferSize)
{
bufferSize = MinBufferSize;
}
_encoder = encoding.GetEncoder();
_byteBuffer = new byte[encoding.GetMaxByteCount(bufferSize)];
_charBuffer = new char[bufferSize];
}
/// <summary>
/// Encodes the specified <see cref="ReadOnlySpan{Char}"/> to <see langword="byte"/>s using the specified <see cref="Encoding"/>
/// and writes the result to <paramref name="writer"/>.
/// </summary>
/// <param name="encoding">The <see cref="Encoding"/> which represents how the data in <paramref name="chars"/> should be encoded.</param>
/// <param name="chars">The <see cref="ReadOnlySequence{Char}"/> to encode to <see langword="byte"/>s.</param>
/// <param name="writer">The buffer to which the encoded bytes will be written.</param>
/// <exception cref="EncoderFallbackException">Thrown if <paramref name="chars"/> contains data that cannot be encoded and <paramref name="encoding"/> is configured
/// to throw an exception when such data is seen.</exception>
public static long GetBytes(this Encoding encoding, ReadOnlySpan <char> chars, IBufferWriter <byte> writer)
{
if (encoding is null)
{
throw new ArgumentNullException(nameof(encoding));
}
if (writer is null)
{
throw new ArgumentNullException(nameof(writer));
}
if (chars.Length <= MaxInputElementsPerIteration)
{
// The input span is small enough where we can one-shot this.
int byteCount = encoding.GetByteCount(chars);
Span <byte> scratchBuffer = writer.GetSpan(byteCount);
int actualBytesWritten = encoding.GetBytes(chars, scratchBuffer);
writer.Advance(actualBytesWritten);
return(actualBytesWritten);
}
else
{
// Allocate a stateful Encoder instance and chunk this.
Convert(encoding.GetEncoder(), chars, writer, flush: true, out long totalBytesWritten, out bool completed);
return(totalBytesWritten);
}
}
// Protected default constructor that sets the output stream
// to a null stream (a bit bucket).
protected EndianWriter()
{
OutStream = Stream.Null;
buffer = new byte[16];
Encoding = new UTF8Encoding(false, true);
encoder = Encoding.GetEncoder();
}
public HttpResponseStreamWriter(Stream stream, Encoding encoding, int bufferSize)
{
_stream = stream;
Encoding = encoding;
_encoder = encoding.GetEncoder();
_charBufferSize = bufferSize;
_charBuffer = new ArraySegment<char>(new char[bufferSize]);
_byteBuffer = new ArraySegment<byte>(new byte[encoding.GetMaxByteCount(bufferSize)]);
}
public TextReaderStream(TextReader textReader, Encoding encoding, int bufferSize = 4096)
{
_textReader = textReader;
_encoding = encoding;
_maxByteCountPerChar = _encoding.GetMaxByteCount(1);
_encoder = encoding.GetEncoder();
if (bufferSize <= 0) throw new ArgumentOutOfRangeException("bufferSize", "zero or negative");
_charBuffer = new char[bufferSize];
}
public HttpResponseStreamWriter(Stream stream, Encoding encoding, LeasedArraySegment<char> leasedCharBuffer, LeasedArraySegment<byte> leasedByteBuffer)
{
_stream = stream;
Encoding = encoding;
_encoder = encoding.GetEncoder();
_charBufferSize = leasedCharBuffer.Data.Count;
_charBuffer = leasedCharBuffer.Data;
_byteBuffer = leasedByteBuffer.Data;
_leasedCharBuffer = leasedCharBuffer;
_leasedByteBuffer = leasedByteBuffer;
}
private TranscodingStream(Stream stream, Encoding outEncoding)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (outEncoding == null)
throw new ArgumentNullException("outEncoding");
this._stream = stream;
this._encoder = outEncoding.GetEncoder();
}
public static IntPtr StringToPtr(string value, Encoding encoding)
{
var encoder = encoding.GetEncoder();
var length = encoding.GetByteCount(value);
// The encoded value is null terminated that's the reason for the '+1'.
var encodedValue = new byte[length + 1];
encoding.GetBytes(value, 0, value.Length, encodedValue, 0);
var handle = Marshal.AllocHGlobal(new IntPtr(encodedValue.Length));
Marshal.Copy(encodedValue, 0, handle, encodedValue.Length);
return handle;
}
/// <summary>
///
/// </summary>
/// <param name="input"></param>
/// <param name="encoding"></param>
public SHA1TextReader(TextReader input, Encoding encoding)
: base()
{
this.input = input;
this.encoder = encoding.GetEncoder();
this.sha1 = SHA1.Create();
this.ibuf = new char[bufferSize];
this.obuf = new byte[bufferSize];
this.ibufIndex = 0;
}
public AsyncStreamWriter(Stream stream, Encoding encoding, int initialBufferCapacity = DefaultIniBufferCapacity, int maxBufferCapacity = DefaultMaxBufferCapacity)
{
if (initialBufferCapacity < 4)
throw new ArgumentOutOfRangeException("initialBufferCapacity");
if (initialBufferCapacity > maxBufferCapacity)
maxBufferCapacity = initialBufferCapacity;
_stream = stream;
_buffer = new byte[initialBufferCapacity];
_maxBufferCapacity = maxBufferCapacity;
_encoder = encoding.GetEncoder();
}
public unsafe BufferedBinaryWriter(Stream output, Encoding encoding)
: base(output, encoding)
{
this.memoryPage = Pool.GetPage();
this.basePtr = this.memoryPage.BasePtr;
this.endPtr = this.memoryPage.EndPtr;
this.ptr = this.basePtr;
this.encoding = encoding;
this.encoder = encoding.GetEncoder();
this.charMaxByteCount = encoding.IsSingleByte ? 1 : encoding.GetMaxByteCount(1);
}
static public int GetEncoder(IntPtr l)
{
try {
System.Text.Encoding self = (System.Text.Encoding)checkSelf(l);
var ret = self.GetEncoder();
pushValue(l, true);
pushValue(l, ret);
return(2);
}
catch (Exception e) {
return(error(l, e));
}
}
public static String convert(string sourceValue, Encoding source, Encoding target)
{
Encoder encoder = source.GetEncoder();
Decoder decoder = target.GetDecoder();
byte[] cpBytes = source.GetBytes(sourceValue);
int bytesCount = source.GetByteCount(sourceValue);
byte[] utfBytes = Encoding.Convert(source, target, cpBytes);
char[] utfChars = new char[bytesCount];
decoder.GetChars(utfBytes, 0, utfBytes.Length, utfChars, 0);
return new String(utfChars);
}
public BinaryWriter(Stream output, Encoding encoding)
{
if (output==null)
throw new ArgumentNullException("output");
if (encoding==null)
throw new ArgumentNullException("encoding");
if (!output.CanWrite)
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotWritable"));
OutStream = output;
_buffer = new byte[16];
_encoding = encoding;
_encoder = _encoding.GetEncoder();
}
public SourceTextStream(SourceText source, int bufferSize = 2048, bool useDefaultEncodingIfNull = false)
{
Debug.Assert(source.Encoding != null || useDefaultEncodingIfNull);
_source = source;
_encoding = source.Encoding ?? s_utf8EncodingWithNoBOM;
_encoder = _encoding.GetEncoder();
_minimumTargetBufferCount = _encoding.GetMaxByteCount(1);
_sourceOffset = 0;
_position = 0;
_charBuffer = new char[Math.Min(bufferSize, _source.Length)];
_bufferOffset = 0;
_bufferUnreadChars = 0;
_preambleWritten = false;
}
public BinaryWriter(Stream output, Encoding encoding, bool leaveOpen)
{
if (output==null)
throw new ArgumentNullException(nameof(output));
if (encoding==null)
throw new ArgumentNullException(nameof(encoding));
if (!output.CanWrite)
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotWritable"));
Contract.EndContractBlock();
OutStream = output;
_buffer = new byte[16];
_encoding = encoding;
_encoder = _encoding.GetEncoder();
_leaveOpen = leaveOpen;
}
public BinaryWriter(Stream output, Encoding encoding, bool leaveOpen)
{
if (output == null)
throw new ArgumentNullException("output");
if (encoding == null)
throw new ArgumentNullException("encoding");
if (!output.CanWrite)
throw new ArgumentException("StreamNotWritable");
OutStream = output;
_buffer = new byte[16];
_encoding = encoding;
_encoder = _encoding.GetEncoder();
_leaveOpen = leaveOpen;
}
internal NpgsqlBuffer(Stream underlying, int size, Encoding textEncoding)
{
if (size < MinimumBufferSize) {
throw new ArgumentOutOfRangeException("size", size, "Buffer size must be at least " + MinimumBufferSize);
}
Contract.EndContractBlock();
Underlying = underlying;
Size = size;
_buf = new byte[Size];
TextEncoding = textEncoding;
_textDecoder = TextEncoding.GetDecoder();
_textEncoder = TextEncoding.GetEncoder();
_tempCharBuf = new char[1024];
_workspace = new byte[8];
}
public object GetRealObject(StreamingContext context)
{
Encoder encoder = _encoding.GetEncoder();
if (_fallback != null)
{
encoder.Fallback = _fallback;
if (_charLeftOver != default(char))
{
EncoderNLS encoderNls = encoder as EncoderNLS;
if (encoderNls != null)
{
encoderNls.charLeftOver = _charLeftOver;
}
}
}
return(encoder);
}
public EndianWriter(Stream output, Endianness endianess, Encoding encoding, bool leaveOpen)
{
if (output == null)
throw new ArgumentNullException(nameof(output));
if (encoding == null)
throw new ArgumentNullException(nameof(encoding));
if (!output.CanWrite)
throw new ArgumentException("Can't write to the output stream", nameof(output));
Contract.EndContractBlock();
OutStream = output;
buffer = new byte[16];
Encoding = encoding;
encoder = Encoding.GetEncoder();
this.leaveOpen = leaveOpen;
Endianess = endianess;
resolvedEndianess = EndianessHelper.Resolve(endianess);
}
public HttpResponseStreamWriter(Stream stream, Encoding encoding, int bufferSize)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
_stream = stream;
Encoding = encoding;
_charBufferSize = bufferSize;
_encoder = encoding.GetEncoder();
_byteBuffer = new ArraySegment<byte>(new byte[encoding.GetMaxByteCount(bufferSize)]);
_charBuffer = new ArraySegment<char>(new char[bufferSize]);
}
public BinaryWriter(Stream output, Encoding encoding)
{
if(output == null)
{
throw new ArgumentNullException("output");
}
if(encoding == null)
{
throw new ArgumentNullException("encoding");
}
if(!output.CanWrite)
{
throw new ArgumentException(S._("IO_NotSupp_Write"));
}
OutStream = output;
this.encoding = encoding;
encoder = encoding.GetEncoder();
smallBuffer = new byte [16];
smallCharBuffer = new char [1];
}
public BinaryWriter(Stream output, Encoding encoding, bool leaveOpen)
{
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
if (!output.CanWrite)
{
throw new ArgumentException(SR.Argument_StreamNotWritable);
}
OutStream = output;
_buffer = new byte[16];
_encoding = encoding;
_encoder = _encoding.GetEncoder();
_leaveOpen = leaveOpen;
}
public StreamWriter(Stream stream, Encoding encoding, int bufferSize)
{
// Validate the parameters.
if(stream == null)
{
throw new ArgumentNullException("stream");
}
if(encoding == null)
{
throw new ArgumentNullException("encoding");
}
if(!stream.CanWrite)
{
throw new ArgumentException(_("IO_NotSupp_Write"));
}
if(bufferSize <= 0)
{
throw new ArgumentOutOfRangeException
("bufferSize", _("ArgRange_BufferSize"));
}
if(bufferSize < MIN_BUFSIZ)
{
bufferSize = MIN_BUFSIZ;
}
// Initialize this object.
this.stream = stream;
this.encoding = encoding;
this.encoder = encoding.GetEncoder();
this.bufferSize = bufferSize;
this.inBuffer = new char [bufferSize];
this.inBufferLen = 0;
this.outBuffer = new byte
[encoding.GetMaxByteCount(bufferSize)];
this.autoFlush = false;
this.streamOwner = false;
// Write the encoding's preamble.
WritePreamble();
}
/// <summary>
/// Encodes a char sequence and writes it to a span
/// </summary>
/// <param name="encoding">The encoding to use</param>
/// <param name="input">The ReadOnlySequence to read from</param>
/// <param name="output">The span to write to</param>
/// <returns>The number of bytes written to <paramref name="output"/></returns>
public static int GetBytes(this Encoding encoding, ReadOnlySequence <char> input, Span <byte> output)
{
var RemainingChars = input.Length;
var BytesUsed = 0;
var Encoder = encoding.GetEncoder();
foreach (var MySegment in input)
{
var InBuffer = MySegment.Span;
bool IsCompleted;
do
{
// Encode the chars into our byte array
Encoder.Convert(
InBuffer,
output,
RemainingChars == InBuffer.Length,
out var CharsRead, out var WrittenBytes, out IsCompleted
);
BytesUsed += WrittenBytes;
output = output.Slice(WrittenBytes);
if (output.IsEmpty)
{
return(BytesUsed);
}
RemainingChars -= CharsRead;
InBuffer = InBuffer.Slice(CharsRead);
// Loop while there are more chars unread, or there are no chars left but there's still data to flush
}while (!InBuffer.IsEmpty || (RemainingChars == 0 && !IsCompleted));
}
return(BytesUsed);
}
private void Init(Stream streamArg, Encoding encodingArg, int bufferSize, bool shouldLeaveOpen)
{
_stream = streamArg;
_encoding = encodingArg;
_encoder = _encoding.GetEncoder();
if (bufferSize < MinBufferSize)
{
bufferSize = MinBufferSize;
}
_charBuffer = new char[bufferSize];
_byteBuffer = new byte[_encoding.GetMaxByteCount(bufferSize)];
_charLen = bufferSize;
// If we're appending to a Stream that already has data, don't write
// the preamble.
if (_stream.CanSeek && _stream.Position > 0)
{
_haveWrittenPreamble = true;
}
_closable = !shouldLeaveOpen;
}
/// <summary>
/// Reads the variable-length string that is terminated either by zero-char or end of stream.
/// After reading, the position will be set after zero-char terminator.
/// </summary>
/// <param name="encoding">The encoding.</param>
/// <returns>String</returns>
public string ReadVariableString(Encoding encoding)
{
// This method reads a block of bytes to "bytes" from stream, then it decodes it into "chars" by using
// the decoder of specified "encoding". This ensures correct decoding of single- or multi-byte strings.
// Then "chars" are scanned for zero-char (terminator) or end of stream. Non-zero chars are added to the
// output "text" list and then returned as string.
// If zero-char is found then the stream postion is returned back to first byte after zero-char.
// This seems to be better than using some complex zero-char locator method and then calling
// Encoding.GetString() method.
var text = new List<char>(_SIZE);
var bytes = GetBytesBuffer();
var chars = GetCharsBuffer();
var decoder = encoding.GetDecoder();
var encoder = encoding.GetEncoder();
var isTerminated = false;
decoder.Reset();
while (!isTerminated)
{
var byteCount = _stream.Read(bytes, 0, _SIZE);
var charCount = encoding.GetChars(bytes, 0, byteCount, chars, 0);
for (int i = 0; i < charCount; i++)
{
var c = chars[i];
if (c == Char.MinValue)
{
var offset = encoder.GetByteCount(chars, 0, i + 1, true) - byteCount;
_stream.Seek(offset, SeekOrigin.Current);
isTerminated = true;
break;
}
text.Add(c);
}
if (!isTerminated && byteCount < _SIZE)
{
isTerminated = true;
}
}
return new String(text.ToArray());
}
// Construct an instance of this class that serializes to a Stream interface.
public XmlEncodedRawTextWriter( Stream stream, XmlWriterSettings settings ) : this( settings ) {
Debug.Assert( stream != null && settings != null );
this.stream = stream;
this.encoding = settings.Encoding;
// the buffer is allocated will OVERFLOW in order to reduce checks when writing out constant size markup
if (settings.Async) {
bufLen = ASYNCBUFSIZE;
}
bufChars = new char[bufLen + OVERFLOW];
bufBytes = new byte[ bufChars.Length ];
bufBytesUsed = 0;
// Init escaping of characters not fitting into the target encoding
trackTextContent = true;
inTextContent = false;
lastMarkPos = 0;
textContentMarks = new int[INIT_MARKS_COUNT];
textContentMarks[0] = 1;
charEntityFallback = new CharEntityEncoderFallback();
this.encoding = (Encoding)settings.Encoding.Clone();
encoding.EncoderFallback = charEntityFallback;
encoder = encoding.GetEncoder();
if ( !stream.CanSeek || stream.Position == 0 ) {
byte[] bom = encoding.GetPreamble();
if ( bom.Length != 0 ) {
this.stream.Write( bom, 0, bom.Length );
}
}
// Write the xml declaration
if ( settings.AutoXmlDeclaration ) {
WriteXmlDeclaration( standalone );
autoXmlDeclaration = true;
}
}
public HttpResponseStreamWriter(
Stream stream,
Encoding encoding,
int bufferSize,
LeasedArraySegment<byte> leasedByteBuffer,
LeasedArraySegment<char> leasedCharBuffer)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
if (leasedByteBuffer == null)
{
throw new ArgumentNullException(nameof(leasedByteBuffer));
}
if (leasedCharBuffer == null)
{
throw new ArgumentNullException(nameof(leasedCharBuffer));
}
var requiredLength = encoding.GetMaxByteCount(bufferSize);
if (requiredLength > leasedByteBuffer.Data.Count)
{
var message = Resources.FormatHttpResponseStreamWriter_InvalidBufferSize(
requiredLength,
bufferSize,
encoding.EncodingName,
typeof(Encoding).FullName,
nameof(Encoding.GetMaxByteCount));
throw new ArgumentException(message, nameof(leasedByteBuffer));
}
_stream = stream;
Encoding = encoding;
_charBufferSize = bufferSize;
_leasedByteBuffer = leasedByteBuffer;
_leasedCharBuffer = leasedCharBuffer;
_encoder = encoding.GetEncoder();
_byteBuffer = leasedByteBuffer.Data;
_charBuffer = leasedCharBuffer.Data;
}
public static int WriteString(byte[] buffer, int offset, int numBytes, bool pad, String str, Encoding enc)
{
Encoder encoder = enc.GetEncoder();
string paddedString = pad ? str + new string(' ', numBytes) : str; // Assumption: never less than one byte per character
int charsUsed;
int bytesUsed;
bool completed;
encoder.Convert(paddedString.ToCharArray(), 0, paddedString.Length, buffer, offset, numBytes, false, out charsUsed, out bytesUsed, out completed);
if (charsUsed < str.Length)
{
throw new IOException("Failed to write entire string");
}
return bytesUsed;
}
private void Init(Stream streamArg, Encoding encodingArg, int bufferSize, bool shouldLeaveOpen)
{
this.stream = streamArg;
this.encoding = encodingArg;
this.encoder = encoding.GetEncoder();
if (bufferSize < MinBufferSize) bufferSize = MinBufferSize;
charBuffer = new char[bufferSize];
byteBuffer = new byte[encoding.GetMaxByteCount(bufferSize)];
charLen = bufferSize;
// If we're appending to a Stream that already has data, don't write
// the preamble.
if (stream.CanSeek && stream.Position > 0)
haveWrittenPreamble = true;
closable = !shouldLeaveOpen;
#if MDA_SUPPORTED
if (Mda.StreamWriterBufferedDataLost.Enabled) {
String callstack = null;
if (Mda.StreamWriterBufferedDataLost.CaptureAllocatedCallStack)
callstack = Environment.GetStackTrace(null, false);
mdaHelper = new MdaHelper(this, callstack);
}
#endif
}
// Writing constructor
public EncodingStreamWrapper(Stream stream, Encoding encoding, bool emitBOM)
{
_isReading = false;
_encoding = encoding;
_stream = stream;
// Set the encoding code
_encodingCode = GetSupportedEncoding(encoding);
if (_encodingCode != SupportedEncoding.UTF8)
{
EnsureBuffers();
_dec = s_validatingUTF8.GetDecoder();
_enc = _encoding.GetEncoder();
// Emit BOM
if (emitBOM)
{
byte[] bom = _encoding.GetPreamble();
if (bom.Length > 0)
_stream.Write(bom, 0, bom.Length);
}
}
}
private void InitForWriting(Stream outputStream, Encoding writeEncoding)
{
_encoding = writeEncoding;
//this.stream = new BufferedStream(outputStream);
_stream = outputStream;
// Set the encoding code
_encodingCode = GetSupportedEncoding(writeEncoding);
if (_encodingCode != SupportedEncoding.UTF8)
{
EnsureBuffers();
_dec = s_validatingUTF8.GetDecoder();
_enc = _encoding.GetEncoder();
}
}
