public override int GetCharCount(byte[] bytes, int index, int count)
{
int result;
try
{
result = defaultEncoding.GetDecoder().GetCharCount(bytes, index, count, true);
}
catch (DecoderFallbackException)
{
result = isoEncoding.GetDecoder().GetCharCount(bytes, index, count, true);
}
return(result);
}
private void Init(Stream stream, Encoding encoding, bool detectEncodingFromByteOrderMarks, int bufferSize, bool leaveOpen)
{
_stream = stream;
_encoding = encoding;
_decoder = encoding.GetDecoder();
if (bufferSize < MinBufferSize)
{
bufferSize = MinBufferSize;
}
_byteBuffer = new byte[bufferSize];
_maxCharsPerBuffer = encoding.GetMaxCharCount(bufferSize);
_charBuffer = new char[_maxCharsPerBuffer];
_byteLen = 0;
_bytePos = 0;
_detectEncoding = detectEncodingFromByteOrderMarks;
// Encoding.GetPreamble() always allocates and returns a new byte[] array for
// encodings that have a preamble.
// We can avoid repeated allocations for the default and commonly used Encoding.UTF8
// encoding by using our own private cached instance of the UTF8 preamble.
// We specifically look for Encoding.UTF8 because we know it has a preamble,
// whereas other instances of UTF8Encoding may not have a preamble enabled, and
// there's no public way to tell if the preamble is enabled for an instance other
// than calling GetPreamble(), which we're trying to avoid.
// This means that other instances of UTF8Encoding are excluded from this optimization.
_preamble = object.ReferenceEquals(encoding, Encoding.UTF8) ?
(s_utf8Preamble ?? (s_utf8Preamble = encoding.GetPreamble())) :
encoding.GetPreamble();
_checkPreamble = (_preamble.Length > 0);
_isBlocked = false;
_closable = !leaveOpen;
}
/// <summary>
/// Create new C file access
/// </summary>
public CFile(Stream stream, Encoding encoding = null)
{
this._Stream = stream;
EOF = _Stream == null;
this._Encoding = encoding ?? Encoding.GetEncoding("Windows-1252");
this._Decoder = _Encoding.GetDecoder();
}
public BinaryReader(Stream input, Encoding encoding)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!input.CanRead)
{
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotReadable"));
}
this.m_stream = input;
this.m_decoder = encoding.GetDecoder();
this.m_maxCharsSize = encoding.GetMaxCharCount(0x80);
int maxByteCount = encoding.GetMaxByteCount(1);
if (maxByteCount < 0x10)
{
maxByteCount = 0x10;
}
this.m_buffer = new byte[maxByteCount];
this.m_charBuffer = null;
this.m_charBytes = null;
this.m_2BytesPerChar = encoding is UnicodeEncoding;
this.m_isMemoryStream = this.m_stream.GetType() == typeof(MemoryStream);
}
public HttpRequestStreamReader(Stream stream, Encoding encoding, int bufferSize)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanRead)
{
throw new ArgumentException(Resources.HttpRequestStreamReader_StreamNotReadable, nameof(stream));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
_stream = stream;
_encoding = encoding;
_decoder = encoding.GetDecoder();
if (bufferSize < MinBufferSize)
{
bufferSize = MinBufferSize;
}
_byteBufferSize = bufferSize;
_byteBuffer = new byte[bufferSize];
var maxCharsPerBuffer = encoding.GetMaxCharCount(bufferSize);
_charBuffer = new char[maxCharsPerBuffer];
}
public ContentReader(Stream stream, long length, Encoding encoding = null) {
_stream = stream;
_length = length;
if (encoding != null) {
_decoder = encoding.GetDecoder();
}
}
/// <summary>
/// Constructs a new binary reader with the given bit converter, reading
/// to the given stream, using the given encoding.
/// </summary>
/// <param name="bitConverter">Converter to use when reading data</param>
/// <param name="stream">Stream to read data from</param>
/// <param name="encoding">Encoding to use when reading character data</param>
public EndianBinaryReader(EndianBitConverter bitConverter, Stream stream, Encoding encoding)
{
if (bitConverter == null)
{
throw new ArgumentNullException("bitConverter");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream isn't writable", "stream");
}
this.stream = stream;
this.bitConverter = bitConverter;
this.encoding = encoding;
this.decoder = encoding.GetDecoder();
this.minBytesPerChar = 1;
if (encoding is UnicodeEncoding)
{
minBytesPerChar = 2;
}
}
public EndianBinaryReader(EndianBitConverter bitConverter, Stream stream, System.Text.Encoding encoding)
{
this.disposed = false;
this.buffer = new byte[0x10];
this.charBuffer = new char[1];
if (bitConverter == null)
{
throw new ArgumentNullException("bitConverter");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream isn't writable", "stream");
}
this.stream = stream;
this.bitConverter = bitConverter;
this.encoding = encoding;
this.decoder = encoding.GetDecoder();
this.minBytesPerChar = 1;
if (encoding is UnicodeEncoding)
{
this.minBytesPerChar = 2;
}
}
public BinaryReader(Stream input, Encoding encoding, bool leaveOpen) {
if (input==null) {
throw new ArgumentNullException(nameof(input));
}
if (encoding==null) {
throw new ArgumentNullException(nameof(encoding));
}
if (!input.CanRead)
throw new ArgumentException(Environment.GetResourceString("Argument_StreamNotReadable"));
Contract.EndContractBlock();
m_stream = input;
m_decoder = encoding.GetDecoder();
m_maxCharsSize = encoding.GetMaxCharCount(MaxCharBytesSize);
int minBufferSize = encoding.GetMaxByteCount(1); // max bytes per one char
if (minBufferSize < 16)
minBufferSize = 16;
m_buffer = new byte[minBufferSize];
// m_charBuffer and m_charBytes will be left null.
// For Encodings that always use 2 bytes per char (or more),
// special case them here to make Read() & Peek() faster.
m_2BytesPerChar = encoding is UnicodeEncoding;
// check if BinaryReader is based on MemoryStream, and keep this for it's life
// we cannot use "as" operator, since derived classes are not allowed
m_isMemoryStream = (m_stream.GetType() == typeof(MemoryStream));
m_leaveOpen = leaveOpen;
Contract.Assert(m_decoder!=null, "[BinaryReader.ctor]m_decoder!=null");
}
public EndianBinaryReader(EndianBitConverter bitConverter, Stream stream, System.Text.Encoding encoding)
{
this.disposed = false;
this.buffer = new byte[0x10];
this.charBuffer = new char[1];
if (bitConverter == null)
{
throw new ArgumentNullException("bitConverter");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream isn't writable", "stream");
}
this.stream = stream;
this.bitConverter = bitConverter;
this.encoding = encoding;
this.decoder = encoding.GetDecoder();
this.minBytesPerChar = 1;
if (encoding is UnicodeEncoding)
{
this.minBytesPerChar = 2;
}
}
public EndianReader(Stream input, Endianness endianess, Encoding encoding, bool leaveOpen)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
if (encoding == null)
{
throw new ArgumentNullException(nameof(encoding));
}
if (!input.CanRead)
throw new ArgumentException("Can't read from the output stream", nameof(input));
Contract.EndContractBlock();
BaseStream = input;
decoder = encoding.GetDecoder();
maxCharsSize = encoding.GetMaxCharCount(MaxCharBytesSize);
var minBufferSize = encoding.GetMaxByteCount(1); // max bytes per one char
if (minBufferSize < 16)
minBufferSize = 16;
buffer = new byte[minBufferSize];
// m_charBuffer and m_charBytes will be left null.
// For Encodings that always use 2 bytes per char (or more),
// special case them here to make Read() & Peek() faster.
use2BytesPerChar = encoding is UnicodeEncoding;
this.leaveOpen = leaveOpen;
Endianness = endianess;
resolvedEndianess = EndianessHelper.Resolve(endianess);
Contract.Assert(decoder != null, "[EndianReader.ctor]m_decoder!=null");
}
public string DecodeByteToString(byte[] byteArray, System.Text.Encoding encoding)
{
char[] chars = new char[byteArray.Length + 1];
System.Text.Decoder d = encoding.GetDecoder();
int charLen = d.GetChars(byteArray, 0, byteArray.Length, chars, 0);
return(new System.String(chars));
}
public PositionedStreamReader(Stream stream, Encoding encoding)
{
this.stream = stream;
this.encoding = encoding;
decoder = encoding.GetDecoder();
bufferpos = 0;
readPosition = 0;
}
public static string ConvertEncoding(string value, Encoding src, Encoding trg)
{
Decoder dec = src.GetDecoder();
byte[] ba = trg.GetBytes(value);
int len = dec.GetCharCount(ba, 0, ba.Length);
char[] ca = new char[len];
dec.GetChars(ba, 0, ba.Length, ca, 0);
return new string(ca);
}
TextSource(Encoding encoding)
{
_buffer = new Byte[BufferSize];
_chars = new Char[BufferSize + 1];
_raw = new MemoryStream();
_index = 0;
_encoding = encoding ?? TextEncoding.Utf8;
_decoder = _encoding.GetDecoder();
}
public AsyncLineReader(Stream stream, Encoding encoding, int bufferSize, int maxLineLength)
{
this.stream = stream;
this.decoder = encoding.GetDecoder();
this.readBuffer = new byte[bufferSize];
this.decodeBuffer = new char[bufferSize];
this.maxLineLength = maxLineLength;
StartRead();
}
public CancellableStreamReader(Stream stream, Encoding encoding)
{
_stream = stream;
_decoder = encoding.GetDecoder();
_byteBuffer = new byte[BufferLength];
_buffer = new char[encoding.GetMaxCharCount(BufferLength)];
_bufferedLength = -1;
_bufferCursor = -1;
}
public AsyncTextReader(IAsyncDataSource dataSource, Encoding encoding, int bufferSize = DefaultBufferSize)
: base()
{
_DataSource = dataSource;
_Encoding = encoding;
_Decoder = _Encoding.GetDecoder();
_BufferSize = Math.Max(MinimumBufferSize, bufferSize);
AllocateBuffer();
}
public MiniStream (IMiniStreamSink sink, Encoding encoding, int buf_size) {
if (sink == null)
throw new ArgumentNullException ();
this.sink = sink;
this.sb = new StringBuilder ();
this.decoder = encoding.GetDecoder ();
this.buf = new char[buf_size];
}
public MyBinaryReader(Stream stream, Encoding encoding)
: base(stream, encoding)
{
this.m_decoder = encoding.GetDecoder();
this.m_maxCharsSize = encoding.GetMaxCharCount(0x80);
int maxByteCount = encoding.GetMaxByteCount(1);
if (maxByteCount < 0x10)
{
maxByteCount = 0x10;
}
}
/// <summary>Initializes a new reusable reader.</summary>
/// <param name="encoding">The Encoding to use. Defaults to UTF8.</param>
/// <param name="bufferSize">The size of the buffer to use when reading from the stream.</param>
public ReusableTextReader(Encoding encoding = null, int bufferSize = 1024)
{
if (encoding == null)
{
encoding = Encoding.UTF8;
}
_decoder = encoding.GetDecoder();
_bytes = new byte[bufferSize];
_chars = new char[encoding.GetMaxCharCount(_bytes.Length)];
}
public BinaryReader(Stream input, Encoding encoding) {
if (input == null || encoding == null)
throw new ArgumentNullException(Locale.GetText ("Input or Encoding is a null reference."));
if (!input.CanRead)
throw new ArgumentException(Locale.GetText ("The stream doesn't support reading."));
m_stream = input;
m_encoding = encoding;
decoder = encoding.GetDecoder ();
m_buffer = new byte [32];
}
internal DryadLinqBinaryReader(NativeBlockStream stream, Encoding encoding)
{
this.m_nativeStream = stream;
this.m_encoding = encoding;
this.m_decoder = encoding.GetDecoder();
this.m_curDataBlockInfo.DataBlock = null;
this.m_curDataBlockInfo.BlockSize = -1;
this.m_curDataBlockInfo.ItemHandle = IntPtr.Zero;
this.m_curDataBlock = this.m_curDataBlockInfo.DataBlock;
this.m_curBlockSize = this.m_curDataBlockInfo.BlockSize;
this.m_curBlockPos = -1;
this.m_isClosed = false;
}
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);
}
static public int GetDecoder(IntPtr l)
{
try {
System.Text.Encoding self = (System.Text.Encoding)checkSelf(l);
var ret = self.GetDecoder();
pushValue(l, true);
pushValue(l, ret);
return(2);
}
catch (Exception e) {
return(error(l, e));
}
}
public BinaryReader(Stream input, Encoding encoding) {
if (input == null || encoding == null)
throw new ArgumentNullException(Locale.GetText ("Input or Encoding is a null reference."));
if (!input.CanRead)
throw new ArgumentException(Locale.GetText ("The stream doesn't support reading."));
m_stream = input;
m_encoding = encoding;
decoder = encoding.GetDecoder ();
// internal buffer size is documented to be between 16 and the value
// returned by GetMaxByteCount for the specified encoding
m_buffer = new byte [Math.Max (16, encoding.GetMaxByteCount (1))];
}
private CancellationTokenSource _disposalTokenSource; // Used to indicate that a cancellation is requested due to disposal
internal SqlSequentialTextReader(SqlDataReader reader, int columnIndex, Encoding encoding)
{
Debug.Assert(reader != null, "Null reader when creating sequential textreader");
Debug.Assert(columnIndex >= 0, "Invalid column index when creating sequential textreader");
Debug.Assert(encoding != null, "Null encoding when creating sequential textreader");
_reader = reader;
_columnIndex = columnIndex;
_encoding = encoding;
_decoder = encoding.GetDecoder();
_leftOverBytes = null;
_peekedChar = -1;
_currentTask = null;
_disposalTokenSource = new CancellationTokenSource();
}
private void Init(Process process, Stream stream, UserCallBack callback, Encoding encoding, int bufferSize) {
this.process = process;
this.stream = stream;
this.encoding = encoding;
this.userCallBack = callback;
decoder = encoding.GetDecoder();
if (bufferSize < MinBufferSize) bufferSize = MinBufferSize;
byteBuffer = new byte[bufferSize];
_maxCharsPerBuffer = encoding.GetMaxCharCount(bufferSize);
charBuffer = new char[_maxCharsPerBuffer];
cancelOperation = false;
eofEvent = new ManualResetEvent(false);
sb = null;
this.bLastCarriageReturn = false;
}
public TcpBinaryReader(Stream input, Encoding encoding)
: base(input, encoding)
{
m_stream = input;
this.m_decoder = encoding.GetDecoder();
this.m_maxCharsSize = encoding.GetMaxCharCount(0x80);
int maxByteCount = encoding.GetMaxByteCount(1);
if (maxByteCount < 0x10)
{
maxByteCount = 0x10;
}
this.m_buffer = new byte[maxByteCount];
this.m_2BytesPerChar = encoding is UnicodeEncoding;
this.m_isMemoryStream = this.m_stream.GetType() == typeof(MemoryStream);
}
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 static string ReadLine(this Stream stream, Encoding encoding = null)
{
encoding = encoding ?? Encoding.UTF8;
var result = new StringBuilder();
var decoder = encoding.GetDecoder();
while (true)
{
var val = ReadMinimum(stream, decoder);
if (val == null) throw new EndOfStreamException();
if (val == "\n") return result.ToString();
if (val != "\r")
{
result.Append(val);
}
}
}
// If we're starting from the beginning of the file, we need to skip the BOM since it's
// not part of the file. If we're starting partway through, there's no need to do that.
//
// It may seem strange allowing specifying the FileAccess, but it is useful as a safeguard
// against other people already having the file open with e.g. FileAccess.Write and FileShare.Read.
Utf8LineReader(string path, bool skipBOM, FileAccess access, FileShare share) {
disposeStream = true;
BaseStream = new FileStream(path, FileMode.Open, access, share);
encoding = Encoding.UTF8;
decoder = encoding.GetDecoder();
lineBuilder = new StringBuilder();
offset = 0;
buffer = new byte[BufferSize];
bytesInBuffer = 0;
Line = 0;
if (skipBOM)
SkipBOM();
}
/// <summary>
/// Initializes an instance of DryadLinqTextReader.
/// </summary>
/// <param name="stream">A native stream to read from.</param>
/// <param name="encoding">The text encoding.</param>
public DryadLinqTextReader(NativeBlockStream stream, Encoding encoding)
{
this.m_nativeStream = stream;
this.m_encoding = encoding;
this.m_decoder = encoding.GetDecoder();
this.m_curDataBlockInfo.DataBlock = null;
this.m_curDataBlockInfo.BlockSize = -1;
this.m_curDataBlockInfo.ItemHandle = IntPtr.Zero;
this.m_curBlockPos = 0;
this.m_decodeUnitCharSize = this.m_encoding.GetMaxCharCount(DecodeUnitByteSize);
this.m_charBuff = new char[this.m_decodeUnitCharSize + 2]; //allow 2 bytes for trailing newline
this.m_charBuffEnd = 0;
this.m_curLineStart = 0;
this.m_curLineEnd = 0;
this.m_isClosed = false;
}
// Creates a new AsyncStreamReader for the given stream. The
// character encoding is set by encoding and the buffer size,
// in number of 16-bit characters, is set by bufferSize.
internal AsyncStreamReader(Stream stream, Action<string> callback, Encoding encoding)
{
Debug.Assert(stream != null && encoding != null && callback != null, "Invalid arguments!");
Debug.Assert(stream.CanRead, "Stream must be readable!");
_stream = stream;
_userCallBack = callback;
_decoder = encoding.GetDecoder();
_byteBuffer = new byte[DefaultBufferSize];
// This is the maximum number of chars we can get from one iteration in loop inside ReadBuffer.
// Used so ReadBuffer can tell when to copy data into a user's char[] directly, instead of our internal char[].
int maxCharsPerBuffer = encoding.GetMaxCharCount(DefaultBufferSize);
_charBuffer = new char[maxCharsPerBuffer];
_cts = new CancellationTokenSource();
_messageQueue = new Queue<string>();
}
/// <summary>
/// Decodes a URL, like System.Web.HttpUtility.UrlDecode
/// </summary>
/// <returns>The decoded URL</returns>
/// <param name="value">The URL fragment to decode</param>
/// <param name="encoding">The encoding to use</param>
public static string UrlDecode(string value, System.Text.Encoding encoding = null)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
encoding = encoding ?? System.Text.Encoding.UTF8;
var decoder = encoding.GetDecoder();
var inbuf = new byte[8];
var outbuf = new char[8];
return(RE_NUMBER.Replace(value, (m) =>
{
if (m.Value == "+")
{
return " ";
}
try
{
var hex = m.Groups["number"].Value;
var bytelen = hex.Length / 2;
Utility.HexStringAsByteArray(hex, inbuf);
var c = decoder.GetChars(inbuf, 0, bytelen, outbuf, 0);
return new string(outbuf, 0, c);
}
catch
{
}
//Fallback
return m.Value;
}));
}
