public string ReadExisting()
{
if (!this.IsOpen)
{
throw new InvalidOperationException(SR.GetString("Port_not_open"));
}
byte[] dst = new byte[this.BytesToRead];
if (this.readPos < this.readLen)
{
Buffer.BlockCopy(this.inBuffer, this.readPos, dst, 0, this.CachedBytesToRead);
}
this.internalSerialStream.Read(dst, this.CachedBytesToRead, dst.Length - this.CachedBytesToRead);
System.Text.Decoder decoder = this.Encoding.GetDecoder();
int num = decoder.GetCharCount(dst, 0, dst.Length);
int length = dst.Length;
if (num == 0)
{
Buffer.BlockCopy(dst, 0, this.inBuffer, 0, dst.Length);
this.readPos = 0;
this.readLen = dst.Length;
return("");
}
do
{
decoder.Reset();
length--;
}while (decoder.GetCharCount(dst, 0, length) == num);
this.readPos = 0;
this.readLen = dst.Length - (length + 1);
Buffer.BlockCopy(dst, length + 1, this.inBuffer, 0, dst.Length - (length + 1));
return(this.Encoding.GetString(dst, 0, length + 1));
}
/// <summary>Read all of the text from the current position of the stream.</summary>
public unsafe string ReadAllText(Stream source)
{
int bytesRead;
while ((bytesRead = source.Read(_bytes, 0, _bytes.Length)) != 0)
{
int charCount = _decoder.GetChars(_bytes, 0, bytesRead, _chars, 0);
_builder.Append(_chars, 0, charCount);
}
string s = _builder.ToString();
_builder.Clear();
_decoder.Reset();
return(s);
}
// convert bytes to string using a fixed blocksize.
// If something bad happens, try to recover using the
// DecoderFallbackException info.
private void DecoderFallbackExceptions_Convert (
char [] chars,
int testno,
Decoder dec,
DecoderFallbackExceptionTest t,
int block_size)
{
int charsUsed, bytesUsed;
bool completed;
int ce = 0; // current exception
for (int c = 0; c < t.bytes.Length; ) {
try {
int bu = c + block_size > t.bytes.Length
? t.bytes.Length - c
: block_size;
dec.Convert (
t.bytes, c, bu,
chars, 0, chars.Length,
c + bu >= t.bytes.Length,
out bytesUsed, out charsUsed,
out completed);
c += bytesUsed;
} catch (DecoderFallbackException ex) {
Assert.IsTrue (
t.eindex.Length > ce,
String.Format (
"test#{0}-2-{1}#{2}: UNEXPECTED FAIL (c={3}, eIndex={4}, eBytesUnknwon={5})",
testno, block_size, ce, c,
ex.Index,
ex.BytesUnknown.Length));
Assert.IsTrue (
ex.Index + c == t.eindex[ce],
String.Format (
"test#{0}-2-{1}#{2}: Expected at {3} not {4}.",
testno, block_size, ce,
t.eindex[ce],
ex.Index + c));
Assert.IsTrue (
ex.BytesUnknown.Length == t.elen[ce],
String.Format (
"test#{0}-2-{1}#{2}: Expected BytesUnknown.Length of {3} not {4} @{5}.",
testno, block_size, ce,
t.elen[0], ex.BytesUnknown.Length, c));
for (int i = 0; i < ex.BytesUnknown.Length; i++)
Assert.IsTrue (
ex.BytesUnknown[i] == t.bytes[ex.Index + i + c],
String.Format (
"test#{0}-2-{1}#{2}: Expected byte {3:X} not {4:X} at {5}.",
testno, block_size, ce,
t.bytes[ex.Index + i + c],
ex.BytesUnknown[i],
ex.Index + i));
c += ex.BytesUnknown.Length + ex.Index;
dec.Reset ();
ce++;
}
}
Assert.IsTrue (
ce == t.eindex.Length,
String.Format (
"test#{0}-2-{1}: UNEXPECTED SUCCESS (expected {2} exceptions, but happened {3})",
testno, block_size, t.eindex.Length, ce));
}
// try to convert the all current test's bytes with Getchars()
// in only one step
private void DecoderFallbackExceptions_GetChars (
char [] chars,
int testno,
Decoder dec,
DecoderFallbackExceptionTest t)
{
try {
dec.GetChars (t.bytes, 0, t.bytes.Length, chars, 0, true);
Assert.IsTrue (
t.eindex.Length == 0,
String.Format (
"test#{0}-1: UNEXPECTED SUCCESS",
testno));
} catch(DecoderFallbackException ex) {
Assert.IsTrue (
t.eindex.Length > 0,
String.Format (
"test#{0}-1: UNEXPECTED FAIL",
testno));
Assert.IsTrue (
ex.Index == t.eindex[0],
String.Format (
"test#{0}-1: Expected exception at {1} not {2}.",
testno,
t.eindex[0],
ex.Index));
Assert.IsTrue (
ex.BytesUnknown.Length == t.elen[0],
String.Format (
"test#{0}-1: Expected BytesUnknown.Length of {1} not {2}.",
testno,
t.elen[0],
ex.BytesUnknown.Length));
for (int i = 0; i < ex.BytesUnknown.Length; i++)
Assert.IsTrue (
ex.BytesUnknown[i] == t.bytes[ex.Index + i],
String.Format (
"test#{0}-1: expected byte {1:X} not {2:X} at {3}.",
testno,
t.bytes[ex.Index + i],
ex.BytesUnknown[i],
ex.Index + i));
dec.Reset ();
}
}
public override void Reset() { decoder.Reset(); }
