internal BaseCodePageEncoding(int codepage, int dataCodePage, EncoderFallback enc, DecoderFallback dec)
: base(codepage, enc, dec)
{
// Remember number of code pages that we'll be using the table for.
dataTableCodePage = dataCodePage;
LoadCodePageTables();
}
// Internal version of "GetByteCount" which can handle a rolling
// state between multiple calls to this method.
private static int InternalGetByteCount (char[] chars, int index, int count, EncoderFallback fallback, ref char leftOver, bool flush)
{
// Validate the parameters.
if (chars == null) {
throw new ArgumentNullException ("chars");
}
if (index < 0 || index > chars.Length) {
throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
}
if (count < 0 || count > (chars.Length - index)) {
throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
}
if (index == chars.Length) {
if (flush && leftOver != '\0') {
// Flush the left-over surrogate pair start.
leftOver = '\0';
return 3;
}
return 0;
}
unsafe {
fixed (char* cptr = chars) {
return InternalGetByteCount (cptr + index, count, fallback, ref leftOver, flush);
}
}
}
// Constructor called by serialization.
internal CodePageEncoding(SerializationInfo info, StreamingContext context)
{
// Any info?
if (info==null) throw new ArgumentNullException(nameof(info));
Contract.EndContractBlock();
// All versions have a code page
this.m_codePage = (int)info.GetValue("m_codePage", typeof(int));
// See if we have a code page
try
{
//
// Try Whidbey V2.0 Fields
//
this.m_isReadOnly = (bool)info.GetValue("m_isReadOnly", typeof(bool));
this.encoderFallback = (EncoderFallback)info.GetValue("encoderFallback", typeof(EncoderFallback));
this.decoderFallback = (DecoderFallback)info.GetValue("decoderFallback", typeof(DecoderFallback));
}
catch (SerializationException)
{
//
// Didn't have Whidbey things, must be Everett
//
this.m_deserializedFromEverett = true;
// May as well be read only
this.m_isReadOnly = true;
}
}
protected CodePageEncoding(int codePage, string name, string webName, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
: base(codePage, encoderFallback, decoderFallback)
{
codePage_ = codePage;
encodingName_ = name;
webName_ = webName;
}
internal EncoderNLSSurrogate(SerializationInfo info, StreamingContext context)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
_encoding = (Encoding)info.GetValue(EncodingKey, typeof(Encoding));
_fallback = (EncoderFallback)info.GetValue(DecoderFallbackKey, typeof(EncoderFallback));
_charLeftOver = (char)info.GetValue(CharLeftOverKey, typeof(char));
}
public virtual Encoding GetEncoding(int codepage, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
Encoding enc = GetEncoding(codepage);
if (enc != null)
{
enc = (Encoding)GetEncoding(codepage).Clone();
enc.EncoderFallback = encoderFallback;
enc.DecoderFallback = decoderFallback;
}
return enc;
}
static bool Encoding_GetEncoding__String__EncoderFallback__DecoderFallback(JSVCall vc, int argc)
{
int len = argc;
if (len == 3)
{
System.String arg0 = (System.String)JSApi.getStringS((int)JSApi.GetType.Arg);
System.Text.EncoderFallback arg1 = (System.Text.EncoderFallback)JSMgr.datax.getObject((int)JSApi.GetType.Arg);
System.Text.DecoderFallback arg2 = (System.Text.DecoderFallback)JSMgr.datax.getObject((int)JSApi.GetType.Arg);
JSMgr.datax.setObject((int)JSApi.SetType.Rval, System.Text.Encoding.GetEncoding(arg0, arg1, arg2));
}
return(true);
}
static void Encoding_EncoderFallback(JSVCall vc)
{
if (vc.bGet)
{
System.Text.Encoding _this = (System.Text.Encoding)vc.csObj;
var result = _this.EncoderFallback;
JSMgr.datax.setObject((int)JSApi.SetType.Rval, result);
}
else
{
System.Text.EncoderFallback arg0 = (System.Text.EncoderFallback)JSMgr.datax.getObject((int)JSApi.GetType.Arg);
System.Text.Encoding _this = (System.Text.Encoding)vc.csObj;
_this.EncoderFallback = arg0;
}
}
internal MLangCodePageEncoding(SerializationInfo info, StreamingContext context)
{
if (info == null)
{
throw new ArgumentNullException("info");
}
this.m_codePage = (int) info.GetValue("m_codePage", typeof(int));
try
{
this.m_isReadOnly = (bool) info.GetValue("m_isReadOnly", typeof(bool));
this.encoderFallback = (EncoderFallback) info.GetValue("encoderFallback", typeof(EncoderFallback));
this.decoderFallback = (DecoderFallback) info.GetValue("decoderFallback", typeof(DecoderFallback));
}
catch (SerializationException)
{
this.m_deserializedFromEverett = true;
this.m_isReadOnly = true;
}
}
// Constructor called by serialization.
internal MLangCodePageEncoding(SerializationInfo info, StreamingContext context)
{
// Any info?
if (info==null) throw new ArgumentNullException("info");
// All versions have a code page
this.m_codePage = (int)info.GetValue("m_codePage", typeof(int));
// See if we have a code page
try
{
this.m_isReadOnly = (bool)info.GetValue("m_isReadOnly", typeof(bool));
this.encoderFallback = (EncoderFallback)info.GetValue("encoderFallback", typeof(EncoderFallback));
this.decoderFallback = (DecoderFallback)info.GetValue("decoderFallback", typeof(DecoderFallback));
}
catch (SerializationException)
{
this.m_deserializedFromEverett = true;
// May as well be read only
this.m_isReadOnly = true;
}
}
[System.Security.SecurityCritical] // auto-generated
public override unsafe int GetBytes(char* chars, int charCount,
byte* bytes, int byteCount, EncoderNLS encoder)
{
// Just need to ASSERT, this is called by something else internal that checked parameters already
Debug.Assert(bytes != null, "[SBCSCodePageEncoding.GetBytes]bytes is null");
Debug.Assert(byteCount >= 0, "[SBCSCodePageEncoding.GetBytes]byteCount is negative");
Debug.Assert(chars != null, "[SBCSCodePageEncoding.GetBytes]chars is null");
Debug.Assert(charCount >= 0, "[SBCSCodePageEncoding.GetBytes]charCount is negative");
// Assert because we shouldn't be able to have a null encoder.
Debug.Assert(EncoderFallback != null, "[SBCSCodePageEncoding.GetBytes]Attempting to use null encoder fallback");
CheckMemorySection();
// Need to test fallback
EncoderReplacementFallback fallback = null;
// Get any left over characters
char charLeftOver = (char)0;
if (encoder != null)
{
charLeftOver = encoder.charLeftOver;
Debug.Assert(charLeftOver == 0 || Char.IsHighSurrogate(charLeftOver),
"[SBCSCodePageEncoding.GetBytes]leftover character should be high surrogate");
fallback = encoder.Fallback as EncoderReplacementFallback;
// Verify that we have no fallbackbuffer, for SBCS its always empty, so just assert
Debug.Assert(!encoder.m_throwOnOverflow || !encoder.InternalHasFallbackBuffer ||
encoder.FallbackBuffer.Remaining == 0,
"[SBCSCodePageEncoding.GetBytes]Expected empty fallback buffer at start");
// if (encoder.m_throwOnOverflow && encoder.InternalHasFallbackBuffer &&
// encoder.FallbackBuffer.Remaining > 0)
// throw new ArgumentException(Environment.GetResourceString("Argument_EncoderFallbackNotEmpty",
// EncodingName, encoder.Fallback.GetType()));
}
else
{
// If we aren't using default fallback then we may have a complicated count.
fallback = EncoderFallback as EncoderReplacementFallback;
}
// prepare our end
char* charEnd = chars + charCount;
byte* byteStart = bytes;
char* charStart = chars;
// See if we do the fast default or slightly slower fallback
if (fallback != null && fallback.MaxCharCount == 1)
{
// Make sure our fallback character is valid first
byte bReplacement = _mapUnicodeToBytes[fallback.DefaultString[0]];
// Check for replacements in range, otherwise fall back to slow version.
if (bReplacement != 0)
{
// We should have exactly as many output bytes as input bytes, unless there's a leftover
// character, in which case we may need one more.
// If we had a leftover character we will have to add a ? (This happens if they had a funky
// fallback last time, but not this time. We can't spit any out though,
// because with fallback encoder each surrogate is treated as a separate code point)
if (charLeftOver > 0)
{
// Have to have room
// Throw even if doing no throw version because this is just 1 char,
// so buffer will never be big enough
if (byteCount == 0)
ThrowBytesOverflow(encoder, true);
// This'll make sure we still have more room and also make sure our return value is correct.
*(bytes++) = bReplacement;
byteCount--; // We used one of the ones we were counting.
}
// This keeps us from overrunning our output buffer
if (byteCount < charCount)
{
// Throw or make buffer smaller?
ThrowBytesOverflow(encoder, byteCount < 1);
// Just use what we can
charEnd = chars + byteCount;
}
// Simple way
while (chars < charEnd)
{
char ch2 = *chars;
chars++;
byte bTemp = _mapUnicodeToBytes[ch2];
// Check for fallback
if (bTemp == 0 && ch2 != (char)0)
*bytes = bReplacement;
else
*bytes = bTemp;
bytes++;
}
// Clear encoder
if (encoder != null)
{
encoder.charLeftOver = (char)0;
encoder.m_charsUsed = (int)(chars - charStart);
}
return (int)(bytes - byteStart);
}
}
// Slower version, have to do real fallback.
// For fallback we may need a fallback buffer, we know we aren't default fallback
EncoderFallbackBuffer fallbackBuffer = null;
// prepare our end
byte* byteEnd = bytes + byteCount;
EncoderFallbackBufferHelper fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
// We may have a left over character from last time, try and process it.
if (charLeftOver > 0)
{
// Since left over char was a surrogate, it'll have to be fallen back.
// Get Fallback
Debug.Assert(encoder != null, "[SBCSCodePageEncoding.GetBytes]Expect to have encoder if we have a charLeftOver");
fallbackBuffer = encoder.FallbackBuffer;
fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
fallbackHelper.InternalInitialize(chars, charEnd, encoder, true);
// This will fallback a pair if *chars is a low surrogate
fallbackHelper.InternalFallback(charLeftOver, ref chars);
if (fallbackBuffer.Remaining > byteEnd - bytes)
{
// Throw it, if we don't have enough for this we never will
ThrowBytesOverflow(encoder, true);
}
}
// Now we may have fallback char[] already from the encoder fallback above
// Go ahead and do it, including the fallback.
char ch;
while ((ch = (fallbackBuffer == null) ? '\0' : fallbackHelper.InternalGetNextChar()) != 0 ||
chars < charEnd)
{
// First unwind any fallback
if (ch == 0)
{
// No fallback, just get next char
ch = *chars;
chars++;
}
// get byte for this char
byte bTemp = _mapUnicodeToBytes[ch];
// Check for fallback, this'll catch surrogate pairs too.
if (bTemp == 0 && ch != (char)0)
{
// Get Fallback
if (fallbackBuffer == null)
{
// Create & init fallback buffer
if (encoder == null)
fallbackBuffer = EncoderFallback.CreateFallbackBuffer();
else
fallbackBuffer = encoder.FallbackBuffer;
fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
// chars has moved so we need to remember figure it out so Exception fallback
// index will be correct
fallbackHelper.InternalInitialize(charEnd - charCount, charEnd, encoder, true);
}
// Make sure we have enough room. Each fallback char will be 1 output char
// (or recursion exception will be thrown)
fallbackHelper.InternalFallback(ch, ref chars);
if (fallbackBuffer.Remaining > byteEnd - bytes)
{
// Didn't use this char, reset it
Debug.Assert(chars > charStart, "[SBCSCodePageEncoding.GetBytes]Expected chars to have advanced (fallback)");
chars--;
fallbackHelper.InternalReset();
// Throw it & drop this data
ThrowBytesOverflow(encoder, chars == charStart);
break;
}
continue;
}
// We'll use this one
// Bounds check
if (bytes >= byteEnd)
{
// didn't use this char, we'll throw or use buffer
Debug.Assert(fallbackBuffer == null || fallbackHelper.bFallingBack == false, "[SBCSCodePageEncoding.GetBytes]Expected to NOT be falling back");
if (fallbackBuffer == null || fallbackHelper.bFallingBack == false)
{
Debug.Assert(chars > charStart, "[SBCSCodePageEncoding.GetBytes]Expected chars to have advanced (normal)");
chars--; // don't use last char
}
ThrowBytesOverflow(encoder, chars == charStart); // throw ?
break; // don't throw, stop
}
// Go ahead and add it
*bytes = bTemp;
bytes++;
}
// encoder stuff if we have one
if (encoder != null)
{
// Fallback stuck it in encoder if necessary, but we have to clear MustFlush cases
if (fallbackBuffer != null && !fallbackHelper.bUsedEncoder)
// Clear it in case of MustFlush
encoder.charLeftOver = (char)0;
// Set our chars used count
encoder.m_charsUsed = (int)(chars - charStart);
}
// Expect Empty fallback buffer for SBCS
Debug.Assert(fallbackBuffer == null || fallbackBuffer.Remaining == 0, "[SBCSEncoding.GetBytes]Expected Empty fallback buffer at end");
return (int)(bytes - byteStart);
}
private MLangCodePageEncoding (SerializationInfo info, StreamingContext context)
{
if (info == null)
throw new ArgumentNullException ("info");
this.codePage = (int) info.GetValue ("m_codePage", typeof (int));
try {
this.isReadOnly = (bool) info.GetValue ("m_isReadOnly", typeof (bool));
this.encoderFallback = (EncoderFallback) info.GetValue ("encoderFallback", typeof (EncoderFallback));
this.decoderFallback = (DecoderFallback) info.GetValue ("decoderFallback", typeof (DecoderFallback));
} catch (SerializationException) {
// .NET Framework 1.x has no fallbacks
this.isReadOnly = true;
}
}
private unsafe static int InternalGetByteCount (char* chars, int count, EncoderFallback fallback, ref char leftOver, bool flush)
{
int length = 0;
char* end = chars + count;
char* start = chars;
EncoderFallbackBuffer buffer = null;
while (chars < end) {
if (leftOver == 0) {
for (; chars < end; chars++) {
if (*chars < '\x80') {
++length;
} else if (*chars < '\x800') {
length += 2;
} else if (*chars < '\uD800' || *chars > '\uDFFF') {
length += 3;
} else if (*chars <= '\uDBFF') {
// This is a surrogate start char, exit the inner loop only
// if we don't find the complete surrogate pair.
if (chars + 1 < end && chars [1] >= '\uDC00' && chars [1] <= '\uDFFF') {
length += 4;
chars++;
continue;
}
leftOver = *chars;
chars++;
break;
} else {
// We have a surrogate tail without
// leading surrogate. In NET_2_0 it
// uses fallback. In NET_1_1 we output
// wrong surrogate.
char [] fallback_chars = GetFallbackChars (chars, start, fallback, ref buffer);
fixed (char *fb_chars = fallback_chars) {
char dummy = '\0';
length += InternalGetByteCount (fb_chars, fallback_chars.Length, fallback, ref dummy, true);
}
leftOver = '\0';
}
}
} else {
if (*chars >= '\uDC00' && *chars <= '\uDFFF') {
// We have a correct surrogate pair.
length += 4;
chars++;
} else {
// We have a surrogate start followed by a
// regular character. Technically, this is
// invalid, but we have to do something.
// We write out the surrogate start and then
// re-visit the current character again.
char [] fallback_chars = GetFallbackChars (chars, start, fallback, ref buffer);
fixed (char *fb_chars = fallback_chars) {
char dummy = '\0';
length += InternalGetByteCount (fb_chars, fallback_chars.Length, fallback, ref dummy, true);
}
}
leftOver = '\0';
}
}
if (flush) {
// Flush the left-over surrogate pair start.
if (leftOver != '\0') {
length += 3;
leftOver = '\0';
}
}
return length;
}
internal static Encoding GetEncodingFromProvider(string encodingName, EncoderFallback enc, DecoderFallback dec)
{
if (s_providers == null)
return null;
EncodingProvider[] providers = s_providers;
foreach (EncodingProvider provider in providers)
{
Encoding encoding = provider.GetEncoding(encodingName, enc, dec);
if (encoding != null)
return encoding;
}
return null;
}
public void SetEncoderFallback(EncoderFallback fallback) {
throw new NotImplementedException();
}
unsafe int InternalGetBytes(char *chars, int charLength, int charIndex, int charCount,
byte[] bytes, int byteIndex,
ref EncoderFallbackBuffer buffer,
ref char [] fallback_chars)
{
if (bytes == null)
{
throw new ArgumentNullException("bytes");
}
if (charIndex < 0 || charIndex > charLength)
{
throw new ArgumentOutOfRangeException("charIndex", _("ArgRange_StringIndex"));
}
if (charCount < 0 || charCount > (charLength - charIndex))
{
throw new ArgumentOutOfRangeException("charCount", _("ArgRange_StringRange"));
}
if (byteIndex < 0 || byteIndex > bytes.Length)
{
throw new ArgumentOutOfRangeException("byteIndex", _("ArgRange_Array"));
}
if ((bytes.Length - byteIndex) < charCount)
{
throw new ArgumentException(_("Arg_InsufficientSpace"));
}
int count = charCount;
char ch;
while (count-- > 0)
{
ch = chars [charIndex++];
if (ch < (char)0x80)
{
bytes [byteIndex++] = (byte)ch;
}
else
{
if (buffer == null)
{
buffer = EncoderFallback.CreateFallbackBuffer();
}
if (Char.IsSurrogate(ch) && count > 1 &&
Char.IsSurrogate(chars [charIndex]))
{
buffer.Fallback(ch, chars [charIndex], charIndex++ - 1);
}
else
{
buffer.Fallback(ch, charIndex - 1);
}
if (fallback_chars == null || fallback_chars.Length < buffer.Remaining)
{
fallback_chars = new char [buffer.Remaining];
}
for (int i = 0; i < fallback_chars.Length; i++)
{
fallback_chars [i] = buffer.GetNextChar();
}
byteIndex += GetBytes(fallback_chars, 0,
fallback_chars.Length, bytes, byteIndex,
ref buffer, ref fallback_chars);
}
}
return(charCount);
}
private unsafe static int InternalGetByteCount(char *chars, int count, EncoderFallback fallback, ref char leftOver, bool flush)
{
int length = 0;
char *end = chars + count;
char *start = chars;
EncoderFallbackBuffer buffer = null;
while (chars < end)
{
if (leftOver == 0)
{
for (; chars < end; chars++)
{
if (*chars < '\x80')
{
++length;
}
else if (*chars < '\x800')
{
length += 2;
}
else if (*chars < '\uD800' || *chars > '\uDFFF')
{
length += 3;
}
else if (*chars <= '\uDBFF')
{
// This is a surrogate start char, exit the inner loop only
// if we don't find the complete surrogate pair.
if (chars + 1 < end && chars [1] >= '\uDC00' && chars [1] <= '\uDFFF')
{
length += 4;
chars++;
continue;
}
leftOver = *chars;
chars++;
break;
}
else
{
// We have a surrogate tail without
// leading surrogate. In NET_2_0 it
// uses fallback. In NET_1_1 we output
// wrong surrogate.
char [] fallback_chars = GetFallbackChars(chars, start, fallback, ref buffer);
fixed(char *fb_chars = fallback_chars)
{
char dummy = '\0';
length += InternalGetByteCount(fb_chars, fallback_chars.Length, fallback, ref dummy, true);
}
leftOver = '\0';
}
}
}
else
{
if (*chars >= '\uDC00' && *chars <= '\uDFFF')
{
// We have a correct surrogate pair.
length += 4;
chars++;
}
else
{
// We have a surrogate start followed by a
// regular character. Technically, this is
// invalid, but we have to do something.
// We write out the surrogate start and then
// re-visit the current character again.
char [] fallback_chars = GetFallbackChars(chars, start, fallback, ref buffer);
fixed(char *fb_chars = fallback_chars)
{
char dummy = '\0';
length += InternalGetByteCount(fb_chars, fallback_chars.Length, fallback, ref dummy, true);
}
}
leftOver = '\0';
}
}
if (flush)
{
// Flush the left-over surrogate pair start.
if (leftOver != '\0')
{
length += 3;
leftOver = '\0';
}
}
return(length);
}
[System.Security.SecurityCritical] // auto-generated
public override unsafe int GetByteCount(char* chars, int count, EncoderNLS encoder)
{
// Just need to ASSERT, this is called by something else internal that checked parameters already
Debug.Assert(count >= 0, "[SBCSCodePageEncoding.GetByteCount]count is negative");
Debug.Assert(chars != null, "[SBCSCodePageEncoding.GetByteCount]chars is null");
// Assert because we shouldn't be able to have a null encoder.
Debug.Assert(EncoderFallback != null, "[SBCSCodePageEncoding.GetByteCount]Attempting to use null fallback");
CheckMemorySection();
// Need to test fallback
EncoderReplacementFallback fallback = null;
// Get any left over characters
char charLeftOver = (char)0;
if (encoder != null)
{
charLeftOver = encoder.charLeftOver;
Debug.Assert(charLeftOver == 0 || Char.IsHighSurrogate(charLeftOver),
"[SBCSCodePageEncoding.GetByteCount]leftover character should be high surrogate");
fallback = encoder.Fallback as EncoderReplacementFallback;
// Verify that we have no fallbackbuffer, actually for SBCS this is always empty, so just assert
Debug.Assert(!encoder.m_throwOnOverflow || !encoder.InternalHasFallbackBuffer ||
encoder.FallbackBuffer.Remaining == 0,
"[SBCSCodePageEncoding.GetByteCount]Expected empty fallback buffer at start");
}
else
{
// If we aren't using default fallback then we may have a complicated count.
fallback = EncoderFallback as EncoderReplacementFallback;
}
if ((fallback != null && fallback.MaxCharCount == 1)/* || bIsBestFit*/)
{
// Replacement fallback encodes surrogate pairs as two ?? (or two whatever), so return size is always
// same as input size.
// Note that no existing SBCS code pages map code points to supplementary characters, so this is easy.
// We could however have 1 extra byte if the last call had an encoder and a funky fallback and
// if we don't use the funky fallback this time.
// Do we have an extra char left over from last time?
if (charLeftOver > 0)
count++;
return (count);
}
// It had a funky fallback, so it's more complicated
// May need buffer later
EncoderFallbackBuffer fallbackBuffer = null;
// prepare our end
int byteCount = 0;
char* charEnd = chars + count;
EncoderFallbackBufferHelper fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
// We may have a left over character from last time, try and process it.
if (charLeftOver > 0)
{
// Since leftover char was a surrogate, it'll have to be fallen back.
// Get fallback
Debug.Assert(encoder != null, "[SBCSCodePageEncoding.GetByteCount]Expect to have encoder if we have a charLeftOver");
fallbackBuffer = encoder.FallbackBuffer;
fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
fallbackHelper.InternalInitialize(chars, charEnd, encoder, false);
// This will fallback a pair if *chars is a low surrogate
fallbackHelper.InternalFallback(charLeftOver, ref chars);
}
// Now we may have fallback char[] already from the encoder
// Go ahead and do it, including the fallback.
char ch;
while ((ch = (fallbackBuffer == null) ? '\0' : fallbackHelper.InternalGetNextChar()) != 0 || chars < charEnd)
{
// First unwind any fallback
if (ch == 0)
{
// No fallback, just get next char
ch = *chars;
chars++;
}
// get byte for this char
byte bTemp = _mapUnicodeToBytes[ch];
// Check for fallback, this'll catch surrogate pairs too.
if (bTemp == 0 && ch != (char)0)
{
if (fallbackBuffer == null)
{
// Create & init fallback buffer
if (encoder == null)
fallbackBuffer = EncoderFallback.CreateFallbackBuffer();
else
fallbackBuffer = encoder.FallbackBuffer;
fallbackHelper = new EncoderFallbackBufferHelper(fallbackBuffer);
// chars has moved so we need to remember figure it out so Exception fallback
// index will be correct
fallbackHelper.InternalInitialize(charEnd - count, charEnd, encoder, false);
}
// Get Fallback
fallbackHelper.InternalFallback(ch, ref chars);
continue;
}
// We'll use this one
byteCount++;
}
Debug.Assert(fallbackBuffer == null || fallbackBuffer.Remaining == 0,
"[SBCSEncoding.GetByteCount]Expected Empty fallback buffer at end");
return (int)byteCount;
}
internal void SetFallbackInternal (EncoderFallback e, DecoderFallback d)
{
if (e != null)
encoder_fallback = e;
if (d != null)
decoder_fallback = d;
}
internal void OnDeserializing()
{
// intialize the optional Whidbey fields
encoderFallback = null;
decoderFallback = null;
m_isReadOnly = true;
}
// Default fallback that we'll use.
internal virtual void SetDefaultFallbacks()
{
#if FEATURE_CORECLR
// For coreclr we only have Unicode, so we don't have best fit fallbacks
this.encoderFallback = new EncoderReplacementFallback("\xFFFD");
this.decoderFallback = new DecoderReplacementFallback("\xFFFD");
#else // !FEATURE_CORECLR
// For UTF-X encodings, we use a replacement fallback with an "\xFFFD" string,
// For ASCII we use "?" replacement fallback, etc.
this.encoderFallback = new InternalEncoderBestFitFallback(this);
this.decoderFallback = new InternalDecoderBestFitFallback(this);
#endif // FEATURE_CORECLR
}
public static Windows1250Encoding Create(EncoderFallback encoder, DecoderFallback decoder)
{
return new Windows1250Encoding(encoder, decoder);
}
// Internal version of "GetBytes" which can handle a rolling
// state between multiple calls to this method.
private static int InternalGetBytes(char[] chars, int charIndex,
int charCount, byte[] bytes,
int byteIndex,
EncoderFallback fallback, ref EncoderFallbackBuffer buffer,
ref char leftOver, bool flush)
{
// Validate the parameters.
if (chars == null)
{
throw new ArgumentNullException("chars");
}
if (bytes == null)
{
throw new ArgumentNullException("bytes");
}
if (charIndex < 0 || charIndex > chars.Length)
{
throw new ArgumentOutOfRangeException("charIndex", _("ArgRange_Array"));
}
if (charCount < 0 || charCount > (chars.Length - charIndex))
{
throw new ArgumentOutOfRangeException("charCount", _("ArgRange_Array"));
}
if (byteIndex < 0 || byteIndex > bytes.Length)
{
throw new ArgumentOutOfRangeException("byteIndex", _("ArgRange_Array"));
}
if (charIndex == chars.Length)
{
if (flush && leftOver != '\0')
{
// FIXME: use EncoderFallback.
//
// By default it is empty, so I do nothing for now.
leftOver = '\0';
}
return(0);
}
unsafe
{
fixed(char *cptr = chars)
{
if (bytes.Length == byteIndex)
{
return(InternalGetBytes(
cptr + charIndex, charCount,
null, 0, fallback, ref buffer, ref leftOver, flush));
fixed(byte *bptr = bytes)
{
return(InternalGetBytes(
cptr + charIndex, charCount,
bptr + byteIndex, bytes.Length - byteIndex,
fallback, ref buffer,
ref leftOver, flush));
}
}
}
}
private unsafe static int InternalGetBytes(char *chars, int count, byte *bytes, int bcount, EncoderFallback fallback, ref EncoderFallbackBuffer buffer, ref char leftOver, bool flush)
{
char *end = chars + count;
char *start = chars;
byte *start_bytes = bytes;
byte *end_bytes = bytes + bcount;
while (chars < end)
{
if (leftOver == 0)
{
for (; chars < end; chars++)
{
int ch = *chars;
if (ch < '\x80')
{
if (bytes >= end_bytes)
{
goto fail_no_space;
}
*bytes++ = (byte)ch;
}
else if (ch < '\x800')
{
if (bytes + 1 >= end_bytes)
{
goto fail_no_space;
}
bytes [0] = (byte)(0xC0 | (ch >> 6));
bytes [1] = (byte)(0x80 | (ch & 0x3F));
bytes += 2;
}
else if (ch < '\uD800' || ch > '\uDFFF')
{
if (bytes + 2 >= end_bytes)
{
goto fail_no_space;
}
bytes [0] = (byte)(0xE0 | (ch >> 12));
bytes [1] = (byte)(0x80 | ((ch >> 6) & 0x3F));
bytes [2] = (byte)(0x80 | (ch & 0x3F));
bytes += 3;
}
else if (ch <= '\uDBFF')
{
// This is a surrogate char, exit the inner loop.
leftOver = *chars;
chars++;
break;
}
else
{
// We have a surrogate tail without
// leading surrogate. In NET_2_0 it
// uses fallback. In NET_1_1 we output
// wrong surrogate.
char [] fallback_chars = GetFallbackChars(chars, start, fallback, ref buffer);
char dummy = '\0';
if (bytes + InternalGetByteCount(fallback_chars, 0, fallback_chars.Length, fallback, ref dummy, true) > end_bytes)
goto fail_no_space;
fixed(char *fb_chars = fallback_chars)
{
bytes += InternalGetBytes(fb_chars, fallback_chars.Length, bytes, bcount - (int)(bytes - start_bytes), fallback, ref buffer, ref dummy, true);
}
leftOver = '\0';
}
}
}
else
{
if (*chars >= '\uDC00' && *chars <= '\uDFFF')
{
// We have a correct surrogate pair.
int ch = 0x10000 + (int)*chars - 0xDC00 + (((int)leftOver - 0xD800) << 10);
if (bytes + 3 >= end_bytes)
{
goto fail_no_space;
}
bytes [0] = (byte)(0xF0 | (ch >> 18));
bytes [1] = (byte)(0x80 | ((ch >> 12) & 0x3F));
bytes [2] = (byte)(0x80 | ((ch >> 6) & 0x3F));
bytes [3] = (byte)(0x80 | (ch & 0x3F));
bytes += 4;
chars++;
}
else
{
// We have a surrogate start followed by a
// regular character. Technically, this is
// invalid, but we have to do something.
// We write out the surrogate start and then
// re-visit the current character again.
char [] fallback_chars = GetFallbackChars(chars, start, fallback, ref buffer);
char dummy = '\0';
if (bytes + InternalGetByteCount(fallback_chars, 0, fallback_chars.Length, fallback, ref dummy, true) > end_bytes)
goto fail_no_space;
fixed(char *fb_chars = fallback_chars)
{
InternalGetBytes(fb_chars, fallback_chars.Length, bytes, bcount - (int)(bytes - start_bytes), fallback, ref buffer, ref dummy, true);
}
leftOver = '\0';
}
leftOver = '\0';
}
}
if (flush)
{
// Flush the left-over surrogate pair start.
if (leftOver != '\0')
{
int ch = leftOver;
if (bytes + 2 < end_bytes)
{
bytes [0] = (byte)(0xE0 | (ch >> 12));
bytes [1] = (byte)(0x80 | ((ch >> 6) & 0x3F));
bytes [2] = (byte)(0x80 | (ch & 0x3F));
bytes += 3;
}
else
{
goto fail_no_space;
}
leftOver = '\0';
}
}
return((int)(bytes - (end_bytes - bcount)));
fail_no_space:
throw new ArgumentException("Insufficient Space", "bytes");
}
protected EncodingNLS(int codePage, EncoderFallback enc, DecoderFallback dec)
: base(codePage, enc, dec)
{
}
public Windows1250Encoding(EncoderFallback encoderFallback, DecoderFallback decoderFallback)
: base(1250, "Central and Eastern Europe (Windows)", "windows-1250", encoderFallback, decoderFallback)
{
byteToChars_ = new char[]
{
'\u0000' // ''
, '\u0001' // ''
, '\u0002' // ''
, '\u0003' // ''
, '\u0004' // ''
, '\u0005' // ''
, '\u0006' // ''
, '\u0007' // ''
, '\u0008' // ''
, '\u0009' // '<TAB>'
, '\u000a' // '<LF>'
, '\u000b' // ' '
, '\u000c' // ' '
, '\u000d' // '<CR>'
, '\u000e' // ''
, '\u000f' // ''
, '\u0010' // ''
, '\u0011' // ''
, '\u0012' // ''
, '\u0013' // ''
, '\u0014' // ''
, '\u0015' // ''
, '\u0016' // ''
, '\u0017' // ''
, '\u0018' // ''
, '\u0019' // ''
, '\u001a' // ''
, '\u001b' // ''
, '\u001c' // ' '
, '\u001d' // ' '
, '\u001e' // ' '
, '\u001f' // ' '
, '\u0020' // ' '
, '\u0021' // '!'
, '\u0022' // '"'
, '\u0023' // '#'
, '\u0024' // '$'
, '\u0025' // '%'
, '\u0026' // '&'
, '\u0027' // '''
, '\u0028' // '('
, '\u0029' // ')'
, '\u002a' // '*'
, '\u002b' // '+'
, '\u002c' // ','
, '\u002d' // '-'
, '\u002e' // '.'
, '\u002f' // '/'
, '\u0030' // '0'
, '\u0031' // '1'
, '\u0032' // '2'
, '\u0033' // '3'
, '\u0034' // '4'
, '\u0035' // '5'
, '\u0036' // '6'
, '\u0037' // '7'
, '\u0038' // '8'
, '\u0039' // '9'
, '\u003a' // ':'
, '\u003b' // ';'
, '\u003c' // '<'
, '\u003d' // '='
, '\u003e' // '>'
, '\u003f' // '?'
, '\u0040' // '@'
, '\u0041' // 'A'
, '\u0042' // 'B'
, '\u0043' // 'C'
, '\u0044' // 'D'
, '\u0045' // 'E'
, '\u0046' // 'F'
, '\u0047' // 'G'
, '\u0048' // 'H'
, '\u0049' // 'I'
, '\u004a' // 'J'
, '\u004b' // 'K'
, '\u004c' // 'L'
, '\u004d' // 'M'
, '\u004e' // 'N'
, '\u004f' // 'O'
, '\u0050' // 'P'
, '\u0051' // 'Q'
, '\u0052' // 'R'
, '\u0053' // 'S'
, '\u0054' // 'T'
, '\u0055' // 'U'
, '\u0056' // 'V'
, '\u0057' // 'W'
, '\u0058' // 'X'
, '\u0059' // 'Y'
, '\u005a' // 'Z'
, '\u005b' // '['
, '\u005c' // '\'
, '\u005d' // ']'
, '\u005e' // '^'
, '\u005f' // '_'
, '\u0060' // '`'
, '\u0061' // 'a'
, '\u0062' // 'b'
, '\u0063' // 'c'
, '\u0064' // 'd'
, '\u0065' // 'e'
, '\u0066' // 'f'
, '\u0067' // 'g'
, '\u0068' // 'h'
, '\u0069' // 'i'
, '\u006a' // 'j'
, '\u006b' // 'k'
, '\u006c' // 'l'
, '\u006d' // 'm'
, '\u006e' // 'n'
, '\u006f' // 'o'
, '\u0070' // 'p'
, '\u0071' // 'q'
, '\u0072' // 'r'
, '\u0073' // 's'
, '\u0074' // 't'
, '\u0075' // 'u'
, '\u0076' // 'v'
, '\u0077' // 'w'
, '\u0078' // 'x'
, '\u0079' // 'y'
, '\u007a' // 'z'
, '\u007b' // '{'
, '\u007c' // '|'
, '\u007d' // '}'
, '\u007e' // '~'
, '\u007f' // ''
, '\u20ac' // '€'
, '\u0081' // ''
, '\u201a' // '‚'
, '\u0083' // ''
, '\u201e' // '„'
, '\u2026' // '…'
, '\u2020' // '†'
, '\u2021' // '‡'
, '\u0088' // ''
, '\u2030' // '‰'
, '\u0160' // 'Š'
, '\u2039' // '‹'
, '\u015a' // 'Ś'
, '\u0164' // 'Ť'
, '\u017d' // 'Ž'
, '\u0179' // 'Ź'
, '\u0090' // ''
, '\u2018' // '‘'
, '\u2019' // '’'
, '\u201c' // '“'
, '\u201d' // '”'
, '\u2022' // '•'
, '\u2013' // '–'
, '\u2014' // '—'
, '\u0098' // ''
, '\u2122' // '™'
, '\u0161' // 'š'
, '\u203a' // '›'
, '\u015b' // 'ś'
, '\u0165' // 'ť'
, '\u017e' // 'ž'
, '\u017a' // 'ź'
, '\u00a0' // ' '
, '\u02c7' // 'ˇ'
, '\u02d8' // '˘'
, '\u0141' // 'Ł'
, '\u00a4' // '¤'
, '\u0104' // 'Ą'
, '\u00a6' // '¦'
, '\u00a7' // '§'
, '\u00a8' // '¨'
, '\u00a9' // '©'
, '\u015e' // 'Ş'
, '\u00ab' // '«'
, '\u00ac' // '¬'
, '\u00ad' // ''
, '\u00ae' // '®'
, '\u017b' // 'Ż'
, '\u00b0' // '°'
, '\u00b1' // '±'
, '\u02db' // '˛'
, '\u0142' // 'ł'
, '\u00b4' // '´'
, '\u00b5' // 'µ'
, '\u00b6' // '¶'
, '\u00b7' // '·'
, '\u00b8' // '¸'
, '\u0105' // 'ą'
, '\u015f' // 'ş'
, '\u00bb' // '»'
, '\u013d' // 'Ľ'
, '\u02dd' // '˝'
, '\u013e' // 'ľ'
, '\u017c' // 'ż'
, '\u0154' // 'Ŕ'
, '\u00c1' // 'Á'
, '\u00c2' // 'Â'
, '\u0102' // 'Ă'
, '\u00c4' // 'Ä'
, '\u0139' // 'Ĺ'
, '\u0106' // 'Ć'
, '\u00c7' // 'Ç'
, '\u010c' // 'Č'
, '\u00c9' // 'É'
, '\u0118' // 'Ę'
, '\u00cb' // 'Ë'
, '\u011a' // 'Ě'
, '\u00cd' // 'Í'
, '\u00ce' // 'Î'
, '\u010e' // 'Ď'
, '\u0110' // 'Đ'
, '\u0143' // 'Ń'
, '\u0147' // 'Ň'
, '\u00d3' // 'Ó'
, '\u00d4' // 'Ô'
, '\u0150' // 'Ő'
, '\u00d6' // 'Ö'
, '\u00d7' // '×'
, '\u0158' // 'Ř'
, '\u016e' // 'Ů'
, '\u00da' // 'Ú'
, '\u0170' // 'Ű'
, '\u00dc' // 'Ü'
, '\u00dd' // 'Ý'
, '\u0162' // 'Ţ'
, '\u00df' // 'ß'
, '\u0155' // 'ŕ'
, '\u00e1' // 'á'
, '\u00e2' // 'â'
, '\u0103' // 'ă'
, '\u00e4' // 'ä'
, '\u013a' // 'ĺ'
, '\u0107' // 'ć'
, '\u00e7' // 'ç'
, '\u010d' // 'č'
, '\u00e9' // 'é'
, '\u0119' // 'ę'
, '\u00eb' // 'ë'
, '\u011b' // 'ě'
, '\u00ed' // 'í'
, '\u00ee' // 'î'
, '\u010f' // 'ď'
, '\u0111' // 'đ'
, '\u0144' // 'ń'
, '\u0148' // 'ň'
, '\u00f3' // 'ó'
, '\u00f4' // 'ô'
, '\u0151' // 'ő'
, '\u00f6' // 'ö'
, '\u00f7' // '÷'
, '\u0159' // 'ř'
, '\u016f' // 'ů'
, '\u00fa' // 'ú'
, '\u0171' // 'ű'
, '\u00fc' // 'ü'
, '\u00fd' // 'ý'
, '\u0163' // 'ţ'
, '\u02d9' // '˙'
};
charToBytes_ = new Dictionary<char, byte>()
{
{ /* '€' */ '\u20ac', 128 },
{ /* '‚' */ '\u201a', 130 },
{ /* '„' */ '\u201e', 132 },
{ /* '…' */ '\u2026', 133 },
{ /* '†' */ '\u2020', 134 },
{ /* '‡' */ '\u2021', 135 },
{ /* '‰' */ '\u2030', 137 },
{ /* 'Š' */ '\u0160', 138 },
{ /* '‹' */ '\u2039', 139 },
{ /* 'Ś' */ '\u015a', 140 },
{ /* 'Ť' */ '\u0164', 141 },
{ /* 'Ž' */ '\u017d', 142 },
{ /* 'Ź' */ '\u0179', 143 },
{ /* '‘' */ '\u2018', 145 },
{ /* '’' */ '\u2019', 146 },
{ /* '“' */ '\u201c', 147 },
{ /* '”' */ '\u201d', 148 },
{ /* '•' */ '\u2022', 149 },
{ /* '–' */ '\u2013', 150 },
{ /* '—' */ '\u2014', 151 },
{ /* '™' */ '\u2122', 153 },
{ /* 'š' */ '\u0161', 154 },
{ /* '›' */ '\u203a', 155 },
{ /* 'ś' */ '\u015b', 156 },
{ /* 'ť' */ '\u0165', 157 },
{ /* 'ž' */ '\u017e', 158 },
{ /* 'ź' */ '\u017a', 159 },
{ /* 'ˇ' */ '\u02c7', 161 },
{ /* '˘' */ '\u02d8', 162 },
{ /* 'Ł' */ '\u0141', 163 },
{ /* 'Ą' */ '\u0104', 165 },
{ /* 'Ş' */ '\u015e', 170 },
{ /* 'Ż' */ '\u017b', 175 },
{ /* '˛' */ '\u02db', 178 },
{ /* 'ł' */ '\u0142', 179 },
{ /* 'ą' */ '\u0105', 185 },
{ /* 'ş' */ '\u015f', 186 },
{ /* 'Ľ' */ '\u013d', 188 },
{ /* '˝' */ '\u02dd', 189 },
{ /* 'ľ' */ '\u013e', 190 },
{ /* 'ż' */ '\u017c', 191 },
{ /* 'Ŕ' */ '\u0154', 192 },
{ /* 'Ă' */ '\u0102', 195 },
{ /* 'Ĺ' */ '\u0139', 197 },
{ /* 'Ć' */ '\u0106', 198 },
{ /* 'Č' */ '\u010c', 200 },
{ /* 'Ę' */ '\u0118', 202 },
{ /* 'Ě' */ '\u011a', 204 },
{ /* 'Ď' */ '\u010e', 207 },
{ /* 'Đ' */ '\u0110', 208 },
{ /* 'Ń' */ '\u0143', 209 },
{ /* 'Ň' */ '\u0147', 210 },
{ /* 'Ő' */ '\u0150', 213 },
{ /* 'Ř' */ '\u0158', 216 },
{ /* 'Ů' */ '\u016e', 217 },
{ /* 'Ű' */ '\u0170', 219 },
{ /* 'Ţ' */ '\u0162', 222 },
{ /* 'ŕ' */ '\u0155', 224 },
{ /* 'ă' */ '\u0103', 227 },
{ /* 'ĺ' */ '\u013a', 229 },
{ /* 'ć' */ '\u0107', 230 },
{ /* 'č' */ '\u010d', 232 },
{ /* 'ę' */ '\u0119', 234 },
{ /* 'ě' */ '\u011b', 236 },
{ /* 'ď' */ '\u010f', 239 },
{ /* 'đ' */ '\u0111', 240 },
{ /* 'ń' */ '\u0144', 241 },
{ /* 'ň' */ '\u0148', 242 },
{ /* 'ő' */ '\u0151', 245 },
{ /* 'ř' */ '\u0159', 248 },
{ /* 'ů' */ '\u016f', 249 },
{ /* 'ű' */ '\u0171', 251 },
{ /* 'ţ' */ '\u0163', 254 },
{ /* '˙' */ '\u02d9', 255 },
};
}
protected EncodingNLS(int codePage, EncoderFallback enc, DecoderFallback dec)
: base(codePage, enc, dec)
{
}
public static Encoding GetEncoding(int codepage,
EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
// Get the default encoding (which is cached and read only)
Encoding baseEncoding = GetEncoding(codepage);
// Clone it and set the fallback
Encoding fallbackEncoding = (Encoding)baseEncoding.Clone();
fallbackEncoding.EncoderFallback = encoderFallback;
fallbackEncoding.DecoderFallback = decoderFallback;
return fallbackEncoding;
}
unsafe static char [] GetFallbackChars (char *chars, char *start, EncoderFallback fallback, ref EncoderFallbackBuffer buffer)
{
if (buffer == null)
buffer = fallback.CreateFallbackBuffer ();
buffer.Fallback (*chars, (int) (chars - start));
char [] fallback_chars = new char [buffer.Remaining];
for (int i = 0; i < fallback_chars.Length; i++)
fallback_chars [i] = buffer.GetNextChar ();
buffer.Reset ();
return fallback_chars;
}
public static Encoding GetEncoding (string name,
EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
if (encoderFallback == null)
throw new ArgumentNullException ("encoderFallback");
if (decoderFallback == null)
throw new ArgumentNullException ("decoderFallback");
Encoding e = GetEncoding (name).Clone () as Encoding;
e.is_readonly = false;
e.encoder_fallback = encoderFallback;
e.decoder_fallback = decoderFallback;
return e;
}
// This constructor is needed to allow any sub-classing implementation to provide encoder/decoder fallback objects
// because the encoding object is always created as read-only object and don’t allow setting encoder/decoder fallback
// after the creation is done.
protected Encoding(int codePage, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
// Validate code page
if (codePage < 0)
{
throw new ArgumentOutOfRangeException("codePage");
}
Contract.EndContractBlock();
// Remember code page
m_codePage = codePage;
this.encoderFallback = encoderFallback ?? new InternalEncoderBestFitFallback(this);
this.decoderFallback = decoderFallback ?? new InternalDecoderBestFitFallback(this);
}
// the following two methods are used for the inherited classes which implemented ISerializable
// Deserialization Helper
internal void DeserializeEncoding(SerializationInfo info, StreamingContext context)
{
// Any info?
if (info==null) throw new ArgumentNullException("info");
Contract.EndContractBlock();
// All versions have a code page
this.m_codePage = (int)info.GetValue("m_codePage", typeof(int));
// We can get dataItem on the fly if needed, and the index is different between versions
// so ignore whatever dataItem data we get from Everett.
this.dataItem = null;
// See if we have a code page
try
{
//
// Try Whidbey V2.0 Fields
//
this.m_isReadOnly = (bool)info.GetValue("m_isReadOnly", typeof(bool));
this.encoderFallback = (EncoderFallback)info.GetValue("encoderFallback", typeof(EncoderFallback));
this.decoderFallback = (DecoderFallback)info.GetValue("decoderFallback", typeof(DecoderFallback));
}
catch (SerializationException)
{
//
// Didn't have Whidbey things, must be Everett
//
this.m_deserializedFromEverett = true;
// May as well be read only
this.m_isReadOnly = true;
SetDefaultFallbacks();
}
}
public static Encoding GetEncoding(int codepage,
EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
Encoding baseEncoding = EncodingProvider.GetEncodingFromProvider(codepage, encoderFallback, decoderFallback);
if (baseEncoding != null)
return baseEncoding;
// Get the default encoding (which is cached and read only)
baseEncoding = GetEncoding(codepage);
// Clone it and set the fallback
Encoding fallbackEncoding = (Encoding)baseEncoding.Clone();
fallbackEncoding.EncoderFallback = encoderFallback;
fallbackEncoding.DecoderFallback = decoderFallback;
return fallbackEncoding;
}
// Internal version of "GetBytes" which can handle a rolling
// state between multiple calls to this method.
private static int InternalGetBytes (char[] chars, int charIndex,
int charCount, byte[] bytes,
int byteIndex,
EncoderFallback fallback, ref EncoderFallbackBuffer buffer,
ref char leftOver, bool flush)
{
// Validate the parameters.
if (chars == null) {
throw new ArgumentNullException ("chars");
}
if (bytes == null) {
throw new ArgumentNullException ("bytes");
}
if (charIndex < 0 || charIndex > chars.Length) {
throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
}
if (charCount < 0 || charCount > (chars.Length - charIndex)) {
throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_Array"));
}
if (byteIndex < 0 || byteIndex > bytes.Length) {
throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
}
if (charIndex == chars.Length) {
if (flush && leftOver != '\0') {
// FIXME: use EncoderFallback.
//
// By default it is empty, so I do nothing for now.
leftOver = '\0';
}
return 0;
}
unsafe {
fixed (char* cptr = chars) {
if (bytes.Length == byteIndex)
return InternalGetBytes (
cptr + charIndex, charCount,
null, 0, fallback, ref buffer, ref leftOver, flush);
fixed (byte *bptr = bytes) {
return InternalGetBytes (
cptr + charIndex, charCount,
bptr + byteIndex, bytes.Length - byteIndex,
fallback, ref buffer,
ref leftOver, flush);
}
}
}
}
internal EncoderNLS(EncodingNLS encoding)
{
m_encoding = encoding;
m_fallback = m_encoding.EncoderFallback;
Reset();
}
// Default fallback that we'll use.
internal virtual void SetDefaultFallbacks()
{
// For UTF-X encodings, we use a replacement fallback with an "\xFFFD" string,
// For ASCII we use "?" replacement fallback, etc.
this.encoderFallback = new InternalEncoderBestFitFallback(this);
this.decoderFallback = new InternalDecoderBestFitFallback(this);
}
private unsafe static int InternalGetBytes (char* chars, int count, byte* bytes, int bcount, EncoderFallback fallback, ref EncoderFallbackBuffer buffer, ref char leftOver, bool flush)
{
char* end = chars + count;
char* start = chars;
byte* start_bytes = bytes;
byte* end_bytes = bytes + bcount;
while (chars < end) {
if (leftOver == 0) {
for (; chars < end; chars++) {
int ch = *chars;
if (ch < '\x80') {
if (bytes >= end_bytes)
goto fail_no_space;
*bytes++ = (byte)ch;
} else if (ch < '\x800') {
if (bytes + 1 >= end_bytes)
goto fail_no_space;
bytes [0] = (byte) (0xC0 | (ch >> 6));
bytes [1] = (byte) (0x80 | (ch & 0x3F));
bytes += 2;
} else if (ch < '\uD800' || ch > '\uDFFF') {
if (bytes + 2 >= end_bytes)
goto fail_no_space;
bytes [0] = (byte) (0xE0 | (ch >> 12));
bytes [1] = (byte) (0x80 | ((ch >> 6) & 0x3F));
bytes [2] = (byte) (0x80 | (ch & 0x3F));
bytes += 3;
} else if (ch <= '\uDBFF') {
// This is a surrogate char, exit the inner loop.
leftOver = *chars;
chars++;
break;
} else {
// We have a surrogate tail without
// leading surrogate. In NET_2_0 it
// uses fallback. In NET_1_1 we output
// wrong surrogate.
char [] fallback_chars = GetFallbackChars (chars, start, fallback, ref buffer);
char dummy = '\0';
if (bytes + InternalGetByteCount (fallback_chars, 0, fallback_chars.Length, fallback, ref dummy, true) > end_bytes)
goto fail_no_space;
fixed (char *fb_chars = fallback_chars) {
bytes += InternalGetBytes (fb_chars, fallback_chars.Length, bytes, bcount - (int) (bytes - start_bytes), fallback, ref buffer, ref dummy, true);
}
leftOver = '\0';
}
}
} else {
if (*chars >= '\uDC00' && *chars <= '\uDFFF') {
// We have a correct surrogate pair.
int ch = 0x10000 + (int) *chars - 0xDC00 + (((int) leftOver - 0xD800) << 10);
if (bytes + 3 >= end_bytes)
goto fail_no_space;
bytes [0] = (byte) (0xF0 | (ch >> 18));
bytes [1] = (byte) (0x80 | ((ch >> 12) & 0x3F));
bytes [2] = (byte) (0x80 | ((ch >> 6) & 0x3F));
bytes [3] = (byte) (0x80 | (ch & 0x3F));
bytes += 4;
chars++;
} else {
// We have a surrogate start followed by a
// regular character. Technically, this is
// invalid, but we have to do something.
// We write out the surrogate start and then
// re-visit the current character again.
char [] fallback_chars = GetFallbackChars (chars, start, fallback, ref buffer);
char dummy = '\0';
if (bytes + InternalGetByteCount (fallback_chars, 0, fallback_chars.Length, fallback, ref dummy, true) > end_bytes)
goto fail_no_space;
fixed (char *fb_chars = fallback_chars) {
InternalGetBytes (fb_chars, fallback_chars.Length, bytes, bcount - (int) (bytes - start_bytes), fallback, ref buffer, ref dummy, true);
}
leftOver = '\0';
}
leftOver = '\0';
}
}
if (flush) {
// Flush the left-over surrogate pair start.
if (leftOver != '\0') {
int ch = leftOver;
if (bytes + 2 < end_bytes) {
bytes [0] = (byte) (0xE0 | (ch >> 12));
bytes [1] = (byte) (0x80 | ((ch >> 6) & 0x3F));
bytes [2] = (byte) (0x80 | (ch & 0x3F));
bytes += 3;
} else {
goto fail_no_space;
}
leftOver = '\0';
}
}
return (int)(bytes - (end_bytes - bcount));
fail_no_space:
throw new ArgumentException ("Insufficient Space", "bytes");
}
public static Encoding GetEncoding(String name,
EncoderFallback encoderFallback, DecoderFallback decoderFallback)
{
Encoding baseEncoding = EncodingProvider.GetEncodingFromProvider(name, encoderFallback, decoderFallback);
if (baseEncoding != null)
return baseEncoding;
//
// NOTE: If you add a new encoding that can be requested by name, be sure to
// add the corresponding item in EncodingTable.
// Otherwise, the code below will throw exception when trying to call
// EncodingTable.GetCodePageFromName().
//
return (GetEncoding(EncodingTable.GetCodePageFromName(name), encoderFallback, decoderFallback));
}
// Constructor.
public UTF8Encoder (EncoderFallback fallback, bool emitIdentifier)
{
Fallback = fallback;
// this.emitIdentifier = emitIdentifier;
leftOverForCount = '\0';
leftOverForConv = '\0';
}
[System.Security.SecurityCritical] // auto-generated
internal DBCSCodePageEncoding(int codePage, int dataCodePage, EncoderFallback enc, DecoderFallback dec) : base(codePage, dataCodePage, enc, dec)
{
}
[MethodImpl(MethodImplOptions.AggressiveInlining)] // called directly by GetByteCountCommon
private protected sealed override unsafe int GetByteCountFast(char *pChars, int charsLength, EncoderFallback fallback, out int charsConsumed)
{
// First: Can we short-circuit the entire calculation?
// If an EncoderReplacementFallback is in use, all non-ASCII chars
// (including surrogate halves) are replaced with the default string.
// If the default string consists of a single ASCII value, then we
// know there's a 1:1 char->byte transcoding in all cases.
int byteCount = charsLength;
if (!(fallback is EncoderReplacementFallback replacementFallback &&
replacementFallback.MaxCharCount == 1 &&
replacementFallback.DefaultString[0] <= 0x7F))
{
// Unrecognized fallback mechanism - count chars manually.
byteCount = (int)ASCIIUtility.GetIndexOfFirstNonAsciiChar(pChars, (uint)charsLength);
}
charsConsumed = byteCount;
return(byteCount);
}
