internal override unsafe int GetChars(byte *bytes, int byteCount,
char *chars, int charCount, DecoderNLS baseDecoder)
{
Debug.Assert(chars != null, "[UTF32Encoding.GetChars]chars!=null");
Debug.Assert(bytes != null, "[UTF32Encoding.GetChars]bytes!=null");
Debug.Assert(byteCount >= 0, "[UTF32Encoding.GetChars]byteCount >=0");
Debug.Assert(charCount >= 0, "[UTF32Encoding.GetChars]charCount >=0");
UTF32Decoder decoder = (UTF32Decoder)baseDecoder;
// None so far!
char *charStart = chars;
char *charEnd = chars + charCount;
byte *byteStart = bytes;
byte *byteEnd = bytes + byteCount;
// See if there's anything in our decoder (but don't clear it yet)
int readCount = 0;
uint iChar = 0;
// For fallback we may need a fallback buffer
DecoderFallbackBuffer fallbackBuffer = null;
char *charsForFallback;
// See if there's anything in our decoder
if (decoder != null)
{
readCount = decoder.readByteCount;
iChar = (uint)decoder.iChar;
fallbackBuffer = baseDecoder.FallbackBuffer;
// Shouldn't have anything in fallback buffer for GetChars
// (don't have to check m_throwOnOverflow for chars)
Debug.Assert(fallbackBuffer.Remaining == 0,
"[UTF32Encoding.GetChars]Expected empty fallback buffer at start");
}
else
{
fallbackBuffer = this.decoderFallback.CreateFallbackBuffer();
}
// Set our internal fallback interesting things.
fallbackBuffer.InternalInitialize(bytes, chars + charCount);
// Loop through our input, 4 characters at a time!
while (bytes < byteEnd)
{
// Get our next character
if (bigEndian)
{
// Scoot left and add it to the bottom
iChar <<= 8;
iChar += *(bytes++);
}
else
{
// Scoot right and add it to the top
iChar >>= 8;
iChar += (uint)(*(bytes++)) << 24;
}
readCount++;
// See if we have all the bytes yet
if (readCount < 4)
{
continue;
}
// Have the bytes
readCount = 0;
// See if its valid to encode
if (iChar > 0x10FFFF || (iChar >= 0xD800 && iChar <= 0xDFFF))
{
// Need to fall back these 4 bytes
byte[] fallbackBytes;
if (bigEndian)
{
fallbackBytes = new byte[] {
unchecked ((byte)(iChar >> 24)), unchecked ((byte)(iChar >> 16)),
unchecked ((byte)(iChar >> 8)), unchecked ((byte)(iChar))
};
}
else
{
fallbackBytes = new byte[] {
unchecked ((byte)(iChar)), unchecked ((byte)(iChar >> 8)),
unchecked ((byte)(iChar >> 16)), unchecked ((byte)(iChar >> 24))
};
}
// Chars won't be updated unless this works.
charsForFallback = chars;
bool fallbackResult = fallbackBuffer.InternalFallback(fallbackBytes, bytes, ref charsForFallback);
chars = charsForFallback;
if (!fallbackResult)
{
// Couldn't fallback, throw or wait til next time
// We either read enough bytes for bytes-=4 to work, or we're
// going to throw in ThrowCharsOverflow because chars == charStart
Debug.Assert(bytes >= byteStart + 4 || chars == charStart,
"[UTF32Encoding.GetChars]Expected to have consumed bytes or throw (bad surrogate)");
bytes -= 4; // get back to where we were
iChar = 0; // Remembering nothing
fallbackBuffer.InternalReset();
ThrowCharsOverflow(decoder, chars == charStart); // Might throw, if no chars output
break; // Stop here, didn't throw
}
// Ignore the illegal character
iChar = 0;
continue;
}
// Ok, we have something we can add to our output
if (iChar >= 0x10000)
{
// Surrogates take 2
if (chars >= charEnd - 1)
{
// Throwing or stopping
// We either read enough bytes for bytes-=4 to work, or we're
// going to throw in ThrowCharsOverflow because chars == charStart
Debug.Assert(bytes >= byteStart + 4 || chars == charStart,
"[UTF32Encoding.GetChars]Expected to have consumed bytes or throw (surrogate)");
bytes -= 4; // get back to where we were
iChar = 0; // Remembering nothing
ThrowCharsOverflow(decoder, chars == charStart); // Might throw, if no chars output
break; // Stop here, didn't throw
}
*(chars++) = GetHighSurrogate(iChar);
iChar = GetLowSurrogate(iChar);
}
// Bounds check for normal character
else if (chars >= charEnd)
{
// Throwing or stopping
// We either read enough bytes for bytes-=4 to work, or we're
// going to throw in ThrowCharsOverflow because chars == charStart
Debug.Assert(bytes >= byteStart + 4 || chars == charStart,
"[UTF32Encoding.GetChars]Expected to have consumed bytes or throw (normal char)");
bytes -= 4; // get back to where we were
iChar = 0; // Remembering nothing
ThrowCharsOverflow(decoder, chars == charStart); // Might throw, if no chars output
break; // Stop here, didn't throw
}
// Add the rest of the surrogate or our normal character
*(chars++) = (char)iChar;
// iChar is back to 0
iChar = 0;
}
// See if we have something left over that has to be decoded
if (readCount > 0 && (decoder == null || decoder.MustFlush))
{
// Oops, there's something left over with no place to go.
byte[] fallbackBytes = new byte[readCount];
int tempCount = readCount;
if (bigEndian)
{
while (tempCount > 0)
{
fallbackBytes[--tempCount] = unchecked ((byte)iChar);
iChar >>= 8;
}
}
else
{
while (tempCount > 0)
{
fallbackBytes[--tempCount] = unchecked ((byte)(iChar >> 24));
iChar <<= 8;
}
}
charsForFallback = chars;
bool fallbackResult = fallbackBuffer.InternalFallback(fallbackBytes, bytes, ref charsForFallback);
chars = charsForFallback;
if (!fallbackResult)
{
// Couldn't fallback.
fallbackBuffer.InternalReset();
ThrowCharsOverflow(decoder, chars == charStart);// Might throw, if no chars output
// Stop here, didn't throw, backed up, so still nothing in buffer
}
else
{
// Don't clear our decoder unless we could fall it back.
// If we caught the if above, then we're a convert() and will catch this next time.
readCount = 0;
iChar = 0;
}
}
// Remember any left over stuff, clearing buffer as well for MustFlush
if (decoder != null)
{
decoder.iChar = (int)iChar;
decoder.readByteCount = readCount;
decoder.m_bytesUsed = (int)(bytes - byteStart);
}
// Shouldn't have anything in fallback buffer for GetChars
// (don't have to check m_throwOnOverflow for chars)
Debug.Assert(fallbackBuffer.Remaining == 0,
"[UTF32Encoding.GetChars]Expected empty fallback buffer at end");
// Return our count
return((int)(chars - charStart));
}
internal override unsafe int GetChars(byte *bytes, int byteCount, char *chars, int charCount, DecoderNLS baseDecoder)
{
UTF32Decoder decoder = (UTF32Decoder)baseDecoder;
char * chPtr = chars;
char * chPtr2 = chars + charCount;
byte * numPtr = bytes;
byte * numPtr2 = bytes + byteCount;
int readByteCount = 0;
uint iChar = 0;
DecoderFallbackBuffer fallbackBuffer = null;
if (decoder != null)
{
readByteCount = decoder.readByteCount;
iChar = (uint)decoder.iChar;
fallbackBuffer = baseDecoder.FallbackBuffer;
}
else
{
fallbackBuffer = base.decoderFallback.CreateFallbackBuffer();
}
fallbackBuffer.InternalInitialize(bytes, chars + charCount);
while (bytes < numPtr2)
{
if (this.bigEndian)
{
iChar = iChar << 8;
bytes++;
iChar += bytes[0];
}
else
{
iChar = iChar >> 8;
bytes++;
iChar += (uint)(bytes[0] << 0x18);
}
readByteCount++;
if (readByteCount >= 4)
{
readByteCount = 0;
if ((iChar > 0x10ffff) || ((iChar >= 0xd800) && (iChar <= 0xdfff)))
{
byte[] buffer2;
if (this.bigEndian)
{
buffer2 = new byte[] { (byte)(iChar >> 0x18), (byte)(iChar >> 0x10), (byte)(iChar >> 8), (byte)iChar };
}
else
{
buffer2 = new byte[] { (byte)iChar, (byte)(iChar >> 8), (byte)(iChar >> 0x10), (byte)(iChar >> 0x18) };
}
if (!fallbackBuffer.InternalFallback(buffer2, bytes, ref chars))
{
bytes -= 4;
iChar = 0;
fallbackBuffer.InternalReset();
base.ThrowCharsOverflow(decoder, chars == chPtr);
break;
}
iChar = 0;
}
else
{
if (iChar >= 0x10000)
{
if (chars >= (chPtr2 - 1))
{
bytes -= 4;
iChar = 0;
base.ThrowCharsOverflow(decoder, chars == chPtr);
break;
}
chars++;
chars[0] = this.GetHighSurrogate(iChar);
iChar = this.GetLowSurrogate(iChar);
}
else if (chars >= chPtr2)
{
bytes -= 4;
iChar = 0;
base.ThrowCharsOverflow(decoder, chars == chPtr);
break;
}
chars++;
chars[0] = (char)iChar;
iChar = 0;
}
}
}
if ((readByteCount > 0) && ((decoder == null) || decoder.MustFlush))
{
byte[] buffer3 = new byte[readByteCount];
int num3 = readByteCount;
if (!this.bigEndian)
{
while (num3 > 0)
{
buffer3[--num3] = (byte)(iChar >> 0x18);
iChar = iChar << 8;
}
}
else
{
while (num3 > 0)
{
buffer3[--num3] = (byte)iChar;
iChar = iChar >> 8;
}
}
if (!fallbackBuffer.InternalFallback(buffer3, bytes, ref chars))
{
fallbackBuffer.InternalReset();
base.ThrowCharsOverflow(decoder, chars == chPtr);
}
else
{
readByteCount = 0;
iChar = 0;
}
}
if (decoder != null)
{
decoder.iChar = (int)iChar;
decoder.readByteCount = readByteCount;
decoder.m_bytesUsed = (int)((long)((bytes - numPtr) / 1));
}
return((int)((long)((chars - chPtr) / 2)));
}
internal override unsafe int GetCharCount(byte *bytes, int count, DecoderNLS baseDecoder)
{
Debug.Assert(bytes != null, "[UTF32Encoding.GetCharCount]bytes!=null");
Debug.Assert(count >= 0, "[UTF32Encoding.GetCharCount]count >=0");
UTF32Decoder decoder = (UTF32Decoder)baseDecoder;
// None so far!
int charCount = 0;
byte *end = bytes + count;
byte *byteStart = bytes;
// Set up decoder
int readCount = 0;
uint iChar = 0;
// For fallback we may need a fallback buffer
DecoderFallbackBuffer fallbackBuffer = null;
// See if there's anything in our decoder
if (decoder != null)
{
readCount = decoder.readByteCount;
iChar = (uint)decoder.iChar;
fallbackBuffer = decoder.FallbackBuffer;
// Shouldn't have anything in fallback buffer for GetCharCount
// (don't have to check m_throwOnOverflow for chars or count)
Debug.Assert(fallbackBuffer.Remaining == 0,
"[UTF32Encoding.GetCharCount]Expected empty fallback buffer at start");
}
else
{
fallbackBuffer = this.decoderFallback.CreateFallbackBuffer();
}
// Set our internal fallback interesting things.
fallbackBuffer.InternalInitialize(byteStart, null);
// Loop through our input, 4 characters at a time!
while (bytes < end && charCount >= 0)
{
// Get our next character
if (bigEndian)
{
// Scoot left and add it to the bottom
iChar <<= 8;
iChar += *(bytes++);
}
else
{
// Scoot right and add it to the top
iChar >>= 8;
iChar += (uint)(*(bytes++)) << 24;
}
readCount++;
// See if we have all the bytes yet
if (readCount < 4)
{
continue;
}
// Have the bytes
readCount = 0;
// See if its valid to encode
if (iChar > 0x10FFFF || (iChar >= 0xD800 && iChar <= 0xDFFF))
{
// Need to fall back these 4 bytes
byte[] fallbackBytes;
if (bigEndian)
{
fallbackBytes = new byte[] {
unchecked ((byte)(iChar >> 24)), unchecked ((byte)(iChar >> 16)),
unchecked ((byte)(iChar >> 8)), unchecked ((byte)(iChar))
};
}
else
{
fallbackBytes = new byte[] {
unchecked ((byte)(iChar)), unchecked ((byte)(iChar >> 8)),
unchecked ((byte)(iChar >> 16)), unchecked ((byte)(iChar >> 24))
};
}
charCount += fallbackBuffer.InternalFallback(fallbackBytes, bytes);
// Ignore the illegal character
iChar = 0;
continue;
}
// Ok, we have something we can add to our output
if (iChar >= 0x10000)
{
// Surrogates take 2
charCount++;
}
// Add the rest of the surrogate or our normal character
charCount++;
// iChar is back to 0
iChar = 0;
}
// See if we have something left over that has to be decoded
if (readCount > 0 && (decoder == null || decoder.MustFlush))
{
// Oops, there's something left over with no place to go.
byte[] fallbackBytes = new byte[readCount];
if (bigEndian)
{
while (readCount > 0)
{
fallbackBytes[--readCount] = unchecked ((byte)iChar);
iChar >>= 8;
}
}
else
{
while (readCount > 0)
{
fallbackBytes[--readCount] = unchecked ((byte)(iChar >> 24));
iChar <<= 8;
}
}
charCount += fallbackBuffer.InternalFallback(fallbackBytes, bytes);
}
// Check for overflows.
if (charCount < 0)
{
throw new ArgumentOutOfRangeException(nameof(count), Environment.GetResourceString("ArgumentOutOfRange_GetByteCountOverflow"));
}
// Shouldn't have anything in fallback buffer for GetCharCount
// (don't have to check m_throwOnOverflow for chars or count)
Debug.Assert(fallbackBuffer.Remaining == 0,
"[UTF32Encoding.GetCharCount]Expected empty fallback buffer at end");
// Return our count
return(charCount);
}
internal override unsafe int GetCharCount(byte *bytes, int count, DecoderNLS baseDecoder)
{
UTF32Decoder decoder = (UTF32Decoder)baseDecoder;
int num = 0;
byte * numPtr = bytes + count;
byte * byteStart = bytes;
int readByteCount = 0;
uint iChar = 0;
DecoderFallbackBuffer fallbackBuffer = null;
if (decoder != null)
{
readByteCount = decoder.readByteCount;
iChar = (uint)decoder.iChar;
fallbackBuffer = decoder.FallbackBuffer;
}
else
{
fallbackBuffer = base.decoderFallback.CreateFallbackBuffer();
}
fallbackBuffer.InternalInitialize(byteStart, null);
while ((bytes < numPtr) && (num >= 0))
{
if (this.bigEndian)
{
iChar = iChar << 8;
bytes++;
iChar += bytes[0];
}
else
{
iChar = iChar >> 8;
bytes++;
iChar += (uint)(bytes[0] << 0x18);
}
readByteCount++;
if (readByteCount >= 4)
{
readByteCount = 0;
if ((iChar > 0x10ffff) || ((iChar >= 0xd800) && (iChar <= 0xdfff)))
{
byte[] buffer2;
if (this.bigEndian)
{
buffer2 = new byte[] { (byte)(iChar >> 0x18), (byte)(iChar >> 0x10), (byte)(iChar >> 8), (byte)iChar };
}
else
{
buffer2 = new byte[] { (byte)iChar, (byte)(iChar >> 8), (byte)(iChar >> 0x10), (byte)(iChar >> 0x18) };
}
num += fallbackBuffer.InternalFallback(buffer2, bytes);
iChar = 0;
}
else
{
if (iChar >= 0x10000)
{
num++;
}
num++;
iChar = 0;
}
}
}
if ((readByteCount > 0) && ((decoder == null) || decoder.MustFlush))
{
byte[] buffer3 = new byte[readByteCount];
if (!this.bigEndian)
{
while (readByteCount > 0)
{
buffer3[--readByteCount] = (byte)(iChar >> 0x18);
iChar = iChar << 8;
}
}
else
{
while (readByteCount > 0)
{
buffer3[--readByteCount] = (byte)iChar;
iChar = iChar >> 8;
}
}
num += fallbackBuffer.InternalFallback(buffer3, bytes);
}
if (num < 0)
{
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_GetByteCountOverflow"));
}
return(num);
}