public override unsafe int GetBytes(char *chars, int charCount, byte *bytes, int byteCount)
{
if ((bytes == null) ||
(chars == null) ||
(charCount < 0) ||
(byteCount < 0))
{
EncodingForwarder.ThrowValidationFailedException(chars, charCount, bytes);
}
Contract.EndContractBlock();
int bytesWritten;
if (charCount > 0)
{
if (byteCount == 0)
{
// Definitely not enough space, early bail
EncodingForwarder.ThrowBytesOverflow(this);
}
int charactersConsumed;
if (!EncodingForwarder.TryEncode(chars, charCount, bytes, byteCount, out charactersConsumed, out bytesWritten))
{
// Not all ASCII, GetBytesFallback for remaining conversion
bytesWritten += GetBytesFallback(chars + charactersConsumed, charCount - charactersConsumed, bytes + bytesWritten, byteCount - bytesWritten, null);
}
}
else
{
// Nothing to encode
bytesWritten = 0;
}
return(bytesWritten);
}
private unsafe byte[] GetBytesValidated(char *input, int charCount)
{
int remaining = 0;
// Assume string is all ASCII and size array for that
byte[] bytes = new byte[charCount];
int bytesWritten;
fixed(byte *output = &bytes[0])
{
int charactersConsumed;
if (!EncodingForwarder.TryEncode(input, charCount, output, charCount, out charactersConsumed, out bytesWritten))
{
// Not all ASCII, get the byte count for the remaining encoded conversion
remaining = GetByteCount(input + charactersConsumed, charCount - charactersConsumed, null);
}
}
if (remaining > 0)
{
// Not all ASCII, fallback to slower path for remaining encoding
var encoded = ResizeGetRemainingBytes(input, charCount, ref bytes, bytesWritten, remaining);
Debug.Assert(encoded == remaining);
}
return(bytes);
}
// Encodes a range of characters in a character array into a range of bytes
// in a byte array. An exception occurs if the byte array is not large
// enough to hold the complete encoding of the characters. The
// GetByteCount method can be used to determine the exact number of
// bytes that will be produced for a given range of characters.
// Alternatively, the GetMaxByteCount method can be used to
// determine the maximum number of bytes that will be produced for a given
// number of characters, regardless of the actual character values.
public unsafe override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex)
{
if ((chars == null) ||
(bytes == null) ||
(charIndex < 0) ||
(charCount < 0) ||
(chars.Length - charIndex < charCount) ||
(byteIndex < 0 || byteIndex > bytes.Length))
{
EncodingForwarder.ThrowValidationFailedException(chars, charIndex, charCount, bytes);
}
Contract.EndContractBlock();
// Note that byteCount is the # of bytes to decode, not the size of the array
int byteCount = bytes.Length - byteIndex;
int bytesWritten;
if (charCount > 0)
{
if (byteCount == 0)
{
// Definitely not enough space, early bail
EncodingForwarder.ThrowBytesOverflow(this);
}
fixed(char *pInput = &chars[0])
fixed(byte *pOutput = &bytes[0])
{
char *input = pInput + charIndex;
byte *output = pOutput + byteIndex;
int charactersConsumed;
if (!EncodingForwarder.TryEncode(input, charCount, output, byteCount, out charactersConsumed, out bytesWritten))
{
// Not all ASCII, GetBytesFallback for remaining conversion
bytesWritten += GetBytesFallback(input + charactersConsumed, charCount - charactersConsumed, output + bytesWritten, byteCount - bytesWritten, null);
}
}
}
else
{
// Nothing to encode
bytesWritten = 0;
}
return(bytesWritten);
}
internal override unsafe int GetBytes(char *chars, int charCount, byte *bytes, int byteCount, EncoderNLS encoder)
{
// Just need to Assert, this is called by internal EncoderNLS and parameters should already be checked
Debug.Assert(this != null);
Debug.Assert(bytes != null);
Debug.Assert(chars != null);
Debug.Assert(charCount >= 0);
Debug.Assert(byteCount >= 0);
int bytesWritten;
int charactersConsumed = 0;
if (((encoder?.InternalHasFallbackBuffer ?? false) &&
(encoder.FallbackBuffer.Remaining > 0)) ||
(charCount > byteCount))
{
// Data already in Fallback buffer, so straight to GetBytesFallback
bytesWritten = GetBytesFallback(chars, charCount, bytes, byteCount, encoder);
}
else if (charCount > 0)
{
if (byteCount == 0)
{
// Definitely not enough space, early bail
EncodingForwarder.ThrowBytesOverflow(this);
}
if (!EncodingForwarder.TryEncode(chars, charCount, bytes, byteCount, out charactersConsumed, out bytesWritten))
{
// Not all ASCII, use GetBytesFallback for remaining conversion
bytesWritten += GetBytesFallback(chars + charactersConsumed, charCount - charactersConsumed, bytes + bytesWritten, byteCount - bytesWritten, encoder);
}
}
else
{
// Nothing to encode
bytesWritten = 0;
}
if (encoder != null)
{
encoder.m_charsUsed += charactersConsumed;
}
return(bytesWritten);
}
