// ---------------------------------------------------------------------------
// XMLChTranscoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLChTranscoder::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of chars in the source.
//
const unsigned int srcChars = srcCount / sizeof(XMLCh);
const unsigned int countToDo = srcChars < maxChars ? srcChars : maxChars;
//
// Copy over the count of chars that we precalculated. Notice we
// convert char count to byte count here!!!
//
memcpy(toFill, srcData, countToDo * sizeof(XMLCh));
// Set the bytes eaten
bytesEaten = countToDo * sizeof(XMLCh);
// Set the character sizes to the fixed size
memset(charSizes, sizeof(XMLCh), countToDo);
// Return the chars we transcoded
return countToDo;
}
unsigned int
XMLChTranscoder::transcodeTo(const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max chars we can store in the output byte buffer, and the number
// of chars in the source.
//
const unsigned int maxOutChars = maxBytes / sizeof(XMLCh);
const unsigned int countToDo = maxOutChars < srcCount
? maxOutChars : srcCount;
//
// Copy over the number of chars we calculated. Note that we have
// to convert the char count to a byte count!!
//
memcpy(toFill, srcData, countToDo * sizeof(XMLCh));
// Set the chars eaten
charsEaten = countToDo;
// Return the bytes we transcoded
return countToDo * sizeof(XMLCh);
}
unsigned int
XMLASCIITranscoder::transcodeTo(const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts options)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the source byte count.
//
const unsigned int countToDo = srcCount < maxBytes ? srcCount : maxBytes;
const XMLCh* srcPtr = srcData;
XMLByte* outPtr = toFill;
for (unsigned int index = 0; index < countToDo; index++)
{
// If its legal, do it and jump back to the top
if (*srcPtr < 0x80)
{
*outPtr++ = XMLByte(*srcPtr++);
continue;
}
//
// Its not representable so use a replacement char. According to
// the options, either throw or use the replacement.
//
if (options == UnRep_Throw)
{
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*srcPtr, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
// Use the replacement char
*outPtr++ = 0x1A;
srcPtr++;
}
// Set the chars we ate
charsEaten = countToDo;
// Return the byte we transcoded
return countToDo;
}
// ---------------------------------------------------------------------------
// XMLASCIITranscoder390: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLASCIITranscoder390::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the source byte count.
//
const unsigned int countToDo = srcCount < maxChars ? srcCount : maxChars;
//
// Now loop through that many source chars and just cast each one
// over to the XMLCh format. Check each source that its really a
// valid ASCI char.
//
const XMLByte* srcPtr = srcData;
XMLCh* outPtr = toFill;
unsigned int countDone = countToDo;
int flag = 0;
// if flag is set to 1, an non-ASCII character is encountered
TROTASC(srcPtr, toFill, &countDone, padding_temp.gFromTable, 0xFFFF, &flag);
if (flag == 1 && countDone < 32){
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*srcPtr, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}//end if
// Set the bytes we ate
bytesEaten = countDone;
// Set the char sizes to the fixed size
memset(charSizes, 1, countDone);
// Return the chars we transcoded
return countDone;
}
void InputPersistenceBlock::readByteArray(Common::Array<byte> &value) {
if (checkMarker(BLOCK_MARKER)) {
uint size;
read(size);
if (checkBlockSize(size)) {
value = Common::Array<byte>(_iter, size);
_iter += size;
}
}
}
bool InputPersistenceBlock::checkMarker(byte marker) {
if (!isGood() || !checkBlockSize(1))
return false;
if (*_iter++ == marker) {
return true;
} else {
_errorState = OUT_OF_SYNC;
error("Wrong type marker found in persistence block.");
return false;
}
}
void InputPersistenceBlock::readString(Common::String &value) {
value = "";
if (checkMarker(STRING_MARKER)) {
uint size;
read(size);
if (checkBlockSize(size)) {
value = Common::String(reinterpret_cast<const char *>(&*_iter), size);
_iter += size;
}
}
}
// ---------------------------------------------------------------------------
// XML256TableTranscoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XML256TableTranscoder::transcodeFrom(const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of chars in the source.
//
const unsigned int countToDo = srcCount < maxChars ? srcCount : maxChars;
//
// Loop through the count we have to do and map each char via the
// lookup table.
//
const XMLByte* srcPtr = srcData;
const XMLByte* endPtr = (srcPtr + countToDo);
XMLCh* outPtr = toFill;
while (srcPtr < endPtr)
{
const XMLCh uniCh = fFromTable[*srcPtr++];
if (uniCh != 0xFFFF)
{
*outPtr++ = uniCh;
continue;
}
}
// Set the bytes eaten
bytesEaten = countToDo;
// Set the character sizes to the fixed size
memset(charSizes, 1, countToDo);
// Return the chars we transcoded
return countToDo;
}
// ---------------------------------------------------------------------------
// XML88591Transcoder390: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XML88591Transcoder390::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of bytes in the source.
//
const unsigned int countToDo = srcCount < maxChars ? srcCount : maxChars;
//
// Loop through the bytes to do and convert over each byte. Its just
// a cast to the wide char type.
//
const XMLByte* srcPtr = srcData;
XMLCh* destPtr = toFill;
const XMLByte* srcEnd = srcPtr + countToDo;
TROT(srcPtr, destPtr, countToDo, padding_temp.gFromTable, 0xFFFF);
// Set the bytes eaten, and set the char size array to the fixed size
bytesEaten = countToDo;
memset(charSizes, 1, countToDo);
// Return the chars we transcoded
return countToDo;
}
// ---------------------------------------------------------------------------
// XMLUTF8Transcoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLUTF8Transcoder::transcodeFrom(const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// Watch for pathological scenario. Shouldn't happen, but...
if (!srcCount || !maxChars)
return 0;
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Get pointers to our start and end points of the input and output
// buffers.
//
const XMLByte* srcPtr = srcData;
const XMLByte* srcEnd = srcPtr + srcCount;
XMLCh* outPtr = toFill;
XMLCh* outEnd = outPtr + maxChars;
unsigned char* sizePtr = charSizes;
//
// We now loop until we either run out of input data, or room to store
// output chars.
//
while ((srcPtr < srcEnd) && (outPtr < outEnd))
{
// Special-case ASCII, which is a leading byte value of <= 127
if (*srcPtr <= 127)
{
*outPtr++ = XMLCh(*srcPtr++);
*sizePtr++ = 1;
continue;
}
// See how many trailing src bytes this sequence is going to require
const unsigned int trailingBytes = gUTFBytes[*srcPtr];
//
// If there are not enough source bytes to do this one, then we
// are done. Note that we done >= here because we are implicitly
// counting the 1 byte we get no matter what.
//
// If we break out here, then there is nothing to undo since we
// haven't updated any pointers yet.
//
if (srcPtr + trailingBytes >= srcEnd)
break;
// Looks ok, so lets build up the value
// or at least let's try to do so--remembering that
// we cannot assume the encoding to be valid:
// first, test first byte
if((gUTFByteIndicatorTest[trailingBytes] & *srcPtr) != gUTFByteIndicator[trailingBytes]) {
char pos[2] = {(char)0x31, 0};
char len[2] = {(char)(trailingBytes+0x31), 0};
char byte[2] = {*srcPtr,0};
ThrowXMLwithMemMgr3(UTFDataFormatException, XMLExcepts::UTF8_FormatError, pos, byte, len, getMemoryManager());
}
/***
* http://www.unicode.org/reports/tr27/
*
* Table 3.1B. lists all of the byte sequences that are legal in UTF-8.
* A range of byte values such as A0..BF indicates that any byte from A0 to BF (inclusive)
* is legal in that position.
* Any byte value outside of the ranges listed is illegal.
* For example,
* the byte sequence <C0 AF> is illegal since C0 is not legal in the 1st Byte column.
* The byte sequence <E0 9F 80> is illegal since in the row
* where E0 is legal as a first byte,
* 9F is not legal as a second byte.
* The byte sequence <F4 80 83 92> is legal, since every byte in that sequence matches
* a byte range in a row of the table (the last row).
*
*
* Table 3.1B. Legal UTF-8 Byte Sequences
* Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte
* =========================================================================
* U+0000..U+007F 00..7F
* -------------------------------------------------------------------------
* U+0080..U+07FF C2..DF 80..BF
*
* -------------------------------------------------------------------------
* U+0800..U+0FFF E0 A0..BF 80..BF
* --
*
* U+1000..U+FFFF E1..EF 80..BF 80..BF
*
* --------------------------------------------------------------------------
* U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
* --
* U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF
* U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
* --
* ==========================================================================
*
* Cases where a trailing byte range is not 80..BF are underlined in the table to
* draw attention to them. These occur only in the second byte of a sequence.
*
***/
XMLUInt32 tmpVal = 0;
switch(trailingBytes)
{
case 1 :
// UTF-8: [110y yyyy] [10xx xxxx]
// Unicode: [0000 0yyy] [yyxx xxxx]
//
// 0xC0, 0xC1 has been filtered out
checkTrailingBytes(*(srcPtr+1), 1, 1);
tmpVal = *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
break;
case 2 :
// UTF-8: [1110 zzzz] [10yy yyyy] [10xx xxxx]
// Unicode: [zzzz yyyy] [yyxx xxxx]
//
if (( *srcPtr == 0xE0) && ( *(srcPtr+1) < 0xA0))
{
char byte0[2] = {*srcPtr ,0};
char byte1[2] = {*(srcPtr+1),0};
ThrowXMLwithMemMgr2(UTFDataFormatException
, XMLExcepts::UTF8_Invalid_3BytesSeq
, byte0
, byte1
, getMemoryManager());
}
checkTrailingBytes(*(srcPtr+1), 2, 1);
checkTrailingBytes(*(srcPtr+2), 2, 2);
//
// D36 (a) UTF-8 is the Unicode Transformation Format that serializes
// a Unicode code point as a sequence of one to four bytes,
// as specified in Table 3.1, UTF-8 Bit Distribution.
// (b) An illegal UTF-8 code unit sequence is any byte sequence that
// does not match the patterns listed in Table 3.1B, Legal UTF-8
// Byte Sequences.
// (c) An irregular UTF-8 code unit sequence is a six-byte sequence
// where the first three bytes correspond to a high surrogate,
// and the next three bytes correspond to a low surrogate.
// As a consequence of C12, these irregular UTF-8 sequences shall
// not be generated by a conformant process.
//
//irregular three bytes sequence
// that is zzzzyy matches leading surrogate tag 110110 or
// trailing surrogate tag 110111
// *srcPtr=1110 1101
// *(srcPtr+1)=1010 yyyy or
// *(srcPtr+1)=1011 yyyy
//
// 0xED 1110 1101
// 0xA0 1010 0000
if ((*srcPtr == 0xED) && (*(srcPtr+1) >= 0xA0))
{
char byte0[2] = {*srcPtr, 0};
char byte1[2] = {*(srcPtr+1),0};
ThrowXMLwithMemMgr2(UTFDataFormatException
, XMLExcepts::UTF8_Irregular_3BytesSeq
, byte0
, byte1
, getMemoryManager());
}
tmpVal = *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
break;
case 3 :
// UTF-8: [1111 0uuu] [10uu zzzz] [10yy yyyy] [10xx xxxx]*
// Unicode: [1101 10ww] [wwzz zzyy] (high surrogate)
// [1101 11yy] [yyxx xxxx] (low surrogate)
// * uuuuu = wwww + 1
//
if (((*srcPtr == 0xF0) && (*(srcPtr+1) < 0x90)) ||
((*srcPtr == 0xF4) && (*(srcPtr+1) > 0x8F)) )
{
char byte0[2] = {*srcPtr ,0};
char byte1[2] = {*(srcPtr+1),0};
ThrowXMLwithMemMgr2(UTFDataFormatException
, XMLExcepts::UTF8_Invalid_4BytesSeq
, byte0
, byte1
, getMemoryManager());
}
checkTrailingBytes(*(srcPtr+1), 3, 1);
checkTrailingBytes(*(srcPtr+2), 3, 2);
checkTrailingBytes(*(srcPtr+3), 3, 3);
tmpVal = *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
tmpVal <<= 6;
tmpVal += *srcPtr++;
break;
default: // trailingBytes > 3
/***
* The definition of UTF-8 in Annex D of ISO/IEC 10646-1:2000 also allows
* for the use of five- and six-byte sequences to encode characters that
* are outside the range of the Unicode character set; those five- and
* six-byte sequences are illegal for the use of UTF-8 as a transformation
* of Unicode characters. ISO/IEC 10646 does not allow mapping of unpaired
* surrogates, nor U+FFFE and U+FFFF (but it does allow other noncharacters).
***/
char len[2] = {(char)(trailingBytes+0x31), 0};
char byte[2] = {*srcPtr,0};
ThrowXMLwithMemMgr2(UTFDataFormatException
, XMLExcepts::UTF8_Exceede_BytesLimit
, byte
, len
, getMemoryManager());
break;
}
// since trailingBytes comes from an array, this logic is redundant
// default :
// ThrowXMLwithMemMgr(TranscodingException, XMLExcepts::Trans_BadSrcSeq);
//}
tmpVal -= gUTFOffsets[trailingBytes];
//
// If it will fit into a single char, then put it in. Otherwise
// encode it as a surrogate pair. If its not valid, use the
// replacement char.
//
if (!(tmpVal & 0xFFFF0000))
{
*sizePtr++ = trailingBytes + 1;
*outPtr++ = XMLCh(tmpVal);
}
else if (tmpVal > 0x10FFFF)
{
//
// If we've gotten more than 32 chars so far, then just break
// out for now and lets process those. When we come back in
// here again, we'll get no chars and throw an exception. This
// way, the error will have a line and col number closer to
// the real problem area.
//
if ((outPtr - toFill) > 32)
break;
ThrowXMLwithMemMgr(TranscodingException, XMLExcepts::Trans_BadSrcSeq, getMemoryManager());
}
else
{
//
// If we have enough room to store the leading and trailing
// chars, then lets do it. Else, pretend this one never
// happened, and leave it for the next time. Since we don't
// update the bytes read until the bottom of the loop, by
// breaking out here its like it never happened.
//
if (outPtr + 1 >= outEnd)
break;
// Store the leading surrogate char
tmpVal -= 0x10000;
*sizePtr++ = trailingBytes + 1;
*outPtr++ = XMLCh((tmpVal >> 10) + 0xD800);
//
// And then the trailing char. This one accounts for no
// bytes eaten from the source, so set the char size for this
// one to be zero.
//
*sizePtr++ = 0;
*outPtr++ = XMLCh((tmpVal & 0x3FF) + 0xDC00);
}
}
// Update the bytes eaten
bytesEaten = srcPtr - srcData;
// Return the characters read
return outPtr - toFill;
}
unsigned int
XML256TableTranscoder390::transcodeTo( const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts options)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of chars in the source.
//
const unsigned int countToDo = srcCount < maxBytes ? srcCount : maxBytes;
//
// Loop through the count we have to do and map each char via the
// lookup table.
//
const XMLCh* srcPtr = srcData;
const XMLCh* endPtr = (srcPtr + countToDo);
XMLByte* outPtr = toFill;
XMLByte nextOut;
while (srcPtr < endPtr)
{
//
// Get the next src char out to a temp, then do a binary search
// of the 'to' table for this entry.
//
if ((nextOut = xlatOneTo(*srcPtr)))
{
*outPtr++ = nextOut;
srcPtr++;
continue;
}
//
// Its not representable so, according to the options, either
// throw or use the replacement.
//
if (options == UnRep_Throw)
{
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*srcPtr, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
// Eat the source char and use the replacement char
srcPtr++;
*outPtr++ = 0x3F;
}
// Set the chars eaten
charsEaten = countToDo;
// Return the bytes we transcoded
return countToDo;
}
// ---------------------------------------------------------------------------
// ICUTranscoder: The virtual transcoder API
// ---------------------------------------------------------------------------
unsigned int
ICUTranscoder::transcodeFrom(const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, insure the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
// Set up pointers to the start and end of the source buffer
const XMLByte* startSrc = srcData;
const XMLByte* endSrc = srcData + srcCount;
//
// And now do the target buffer. This works differently according to
// whether XMLCh and UChar are the same size or not.
//
UChar* startTarget;
if (sizeof(XMLCh) == sizeof(UChar))
startTarget = (UChar*)toFill;
else
startTarget = (UChar*) getMemoryManager()->allocate
(
maxChars * sizeof(UChar)
);//new UChar[maxChars];
UChar* orgTarget = startTarget;
//
// Transoode the buffer. Buffer overflow errors are normal, occuring
// when the raw input buffer holds more characters than will fit in
// the Unicode output buffer.
//
UErrorCode err = U_ZERO_ERROR;
ucnv_toUnicode
(
fConverter
, &startTarget
, startTarget + maxChars
, (const char**)&startSrc
, (const char*)endSrc
, (fFixed ? 0 : (int32_t*)fSrcOffsets)
, false
, &err
);
if ((err != U_ZERO_ERROR) && (err != U_BUFFER_OVERFLOW_ERROR))
{
if (orgTarget != (UChar*)toFill)
getMemoryManager()->deallocate(orgTarget);//delete [] orgTarget;
if (fFixed)
{
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)(*startTarget), tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_BadSrcCP
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
else
{
ThrowXMLwithMemMgr(TranscodingException, XMLExcepts::Trans_BadSrcSeq, getMemoryManager());
}
}
// Calculate the bytes eaten and store in caller's param
bytesEaten = startSrc - srcData;
// And the characters decoded
const unsigned int charsDecoded = startTarget - orgTarget;
//
// Translate the array of char offsets into an array of character
// sizes, which is what the transcoder interface semantics requires.
// If its fixed, then we can optimize it.
//
if (fFixed)
{
const unsigned char fillSize = (unsigned char)ucnv_getMaxCharSize(fConverter);
memset(charSizes, fillSize, maxChars);
}
else
{
//
// We have to convert the series of offsets into a series of
// sizes. If just one char was decoded, then its the total bytes
// eaten. Otherwise, do a loop and subtract out each element from
// its previous element.
//
if (charsDecoded == 1)
{
charSizes[0] = (unsigned char)bytesEaten;
}
else
{
// ICU does not return an extra element to allow us to figure
// out the last char size, so we have to compute it from the
// total bytes used.
unsigned int index;
for (index = 0; index < charsDecoded - 1; index++)
{
charSizes[index] = (unsigned char)(fSrcOffsets[index + 1]
- fSrcOffsets[index]);
}
if( charsDecoded > 0 ) {
charSizes[charsDecoded - 1] = (unsigned char)(bytesEaten
- fSrcOffsets[charsDecoded - 1]);
}
}
}
//
// If XMLCh and UChar are not the same size, then we need to copy over
// the temp buffer to the new one.
//
if (sizeof(UChar) != sizeof(XMLCh))
{
XMLCh* outPtr = toFill;
startTarget = orgTarget;
for (unsigned int index = 0; index < charsDecoded; index++)
*outPtr++ = XMLCh(*startTarget++);
// And delete the temp buffer
getMemoryManager()->deallocate(orgTarget);//delete [] orgTarget;
}
// Return the chars we put into the target buffer
return charsDecoded;
}
unsigned int
XML88591Transcoder390::transcodeTo(const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts options)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output bytes and the number of chars in the source.
//
const unsigned int countToDo = srcCount < maxBytes ? srcCount : maxBytes;
//
// Loop through the bytes to do and convert over each byte. Its just
// a downcast of the wide char, checking for unrepresentable chars.
//
const XMLCh* srcPtr = srcData;
const XMLCh* srcEnd = srcPtr + countToDo;
XMLByte* destPtr = toFill;
while (srcPtr < srcEnd)
{
// If its legal, take it and jump back to top
if (*srcPtr < 256)
{
*destPtr++ = XMLByte(*srcPtr++);
continue;
}
//
// Its not representable so use a replacement char. According to
// the options, either throw or use the replacement.
//
if (options == UnRep_Throw)
{
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*srcPtr, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
*destPtr++ = 0x1A;
srcPtr++;
}
// Set the chars eaten
charsEaten = countToDo;
// Return the bytes we transcoded
return countToDo;
}
// ---------------------------------------------------------------------------
// XMLUCS4Transcoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLUCS4Transcoder::transcodeFrom(const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Get pointers to the start and end of the source buffer in terms of
// UCS-4 characters.
//
const UCS4Ch* srcPtr = (const UCS4Ch*)srcData;
const UCS4Ch* srcEnd = srcPtr + (srcCount / sizeof(UCS4Ch));
//
// Get pointers to the start and end of the target buffer, which is
// in terms of the XMLCh chars we output.
//
XMLCh* outPtr = toFill;
XMLCh* outEnd = toFill + maxChars;
//
// And get a pointer into the char sizes buffer. We will run this
// up as we put chars into the output buffer.
//
unsigned char* sizePtr = charSizes;
//
// Now process chars until we either use up all our source or all of
// our output space.
//
while ((outPtr < outEnd) && (srcPtr < srcEnd))
{
//
// Get the next UCS char out of the buffer. Don't bump the ptr
// yet since we might not have enough storage for it in the target
// (if its causes a surrogate pair to be created.
//
UCS4Ch nextVal = *srcPtr;
// If it needs to be swapped, then do it
if (fSwapped)
nextVal = BitOps::swapBytes(nextVal);
// Handle a surrogate pair if needed
if (nextVal & 0xFFFF0000)
{
//
// If we don't have room for both of the chars, then we
// bail out now.
//
if (outPtr + 1 == outEnd)
break;
const XMLCh ch1 = XMLCh(((nextVal - 0x10000) >> 10) + 0xD800);
const XMLCh ch2 = XMLCh(((nextVal - 0x10000) & 0x3FF) + 0xDC00);
//
// We have room so store them both. But note that the
// second one took up no source bytes!
//
*sizePtr++ = sizeof(UCS4Ch);
*outPtr++ = ch1;
*sizePtr++ = 0;
*outPtr++ = ch2;
}
else
{
//
// No surrogate, so just store it and bump the count of chars
// read. Update the char sizes buffer for this char's entry.
//
*sizePtr++ = sizeof(UCS4Ch);
*outPtr++ = XMLCh(nextVal);
}
// Indicate that we ate another UCS char's worth of bytes
srcPtr++;
}
unsigned int
XMLUTF16Transcoder::transcodeTo(const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxBytes);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// chars that we can fit into the output buffer, and the source
// chars available.
//
const unsigned int maxOutChars = maxBytes / sizeof(UTF16Ch);
const unsigned int countToDo = srcCount < maxOutChars ? srcCount : maxOutChars;
//
// Get a pointer tot he output buffer in the UTF-16 character format
// that we need to work with. And get a mutable pointer to the source
// character buffer.
//
UTF16Ch* outPtr = (UTF16Ch*)toFill;
const XMLCh* srcPtr = srcData;
//
// If the target format is swapped from our native format, then handle
// it one way, else handle it another.
//
if (fSwapped)
{
//
// And then do the swapping loop for the count we precalculated. Note
// that this also handles size conversion as well if XMLCh is not the
// same size as UTF16Ch.
//
for (unsigned int index = 0; index < countToDo; index++)
{
// To avoid flakey compilers, use a temp
const UTF16Ch tmpCh = UTF16Ch(*srcPtr++);
*outPtr++ = BitOps::swapBytes(tmpCh);
}
}
else
{
//
// If XMLCh and UTF16Ch are the same size, we can just do a fast
// memory copy. Otherwise, we have to do a loop and downcast each
// character into its new 16 bit storage.
//
if (sizeof(XMLCh) == sizeof(UTF16Ch))
{
// Notice we convert char count to byte count here!!!
memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch));
}
else
{
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = UTF16Ch(*srcPtr++);
}
}
// Set the chars eaten to the calculated number we ate
charsEaten = countToDo;
//Return the bytes we ate. Note we convert to a byte count here!
return countToDo * sizeof(UTF16Ch);
}
// ---------------------------------------------------------------------------
// XMLUTF16Transcoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLUTF16Transcoder::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the number of chars in the source.
//
const unsigned int srcChars = srcCount / sizeof(UTF16Ch);
const unsigned int countToDo = srcChars < maxChars ? srcChars : maxChars;
// Look at the source data as UTF16 chars
const UTF16Ch* asUTF16 = (const UTF16Ch*)srcData;
// And get a mutable pointer to the output
XMLCh* outPtr = toFill;
//
// If its swapped, we have to do a char by char swap and cast. Else
// we have to check whether our XMLCh and UTF16Ch types are the same
// size or not. If so, we can optimize by just doing a buffer copy.
//
if (fSwapped)
{
//
// And then do the swapping loop for the count we precalculated. Note
// that this also handles size conversion as well if XMLCh is not the
// same size as UTF16Ch.
//
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = BitOps::swapBytes(*asUTF16++);
}
else
{
//
// If the XMLCh type is the same size as a UTF16 value on this
// platform, then we can do just a buffer copy straight to the target
// buffer since our source chars are UTF-16 chars. If its not, then
// we still have to do a loop and assign each one, in order to
// implicitly convert.
//
if (sizeof(XMLCh) == sizeof(UTF16Ch))
{
// Notice we convert char count to byte count here!!!
memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch));
}
else
{
for (unsigned int index = 0; index < countToDo; index++)
*outPtr++ = XMLCh(*asUTF16++);
}
}
// Set the bytes eaten
bytesEaten = countToDo * sizeof(UTF16Ch);
// Set the character sizes to the fixed size
memset(charSizes, sizeof(UTF16Ch), countToDo);
// Return the chars we transcoded
return countToDo;
}
void InputPersistenceBlock::rawRead(void *destPtr, size_t size) {
if (checkBlockSize(size)) {
memcpy(destPtr, &*_iter, size);
_iter += size;
}
}
// ---------------------------------------------------------------------------
// XMLASCIITranscoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLASCIITranscoder::transcodeFrom( const XMLByte* const srcData
, const unsigned int srcCount
, XMLCh* const toFill
, const unsigned int maxChars
, unsigned int& bytesEaten
, unsigned char* const charSizes)
{
// If debugging, make sure that the block size is legal
#if defined(XERCES_DEBUG)
checkBlockSize(maxChars);
#endif
//
// Calculate the max chars we can do here. Its the lesser of the
// max output chars and the source byte count.
//
const unsigned int countToDo = srcCount < maxChars ? srcCount : maxChars;
//
// Now loop through that many source chars and just cast each one
// over to the XMLCh format. Check each source that its really a
// valid ASCI char.
//
const XMLByte* srcPtr = srcData;
XMLCh* outPtr = toFill;
unsigned int countDone = 0;
for (; countDone < countToDo; countDone++)
{
// Do the optimistic work up front
if (*srcPtr < 0x80)
{
*outPtr++ = XMLCh(*srcPtr++);
continue;
}
//
// We got non source encoding char. If we got more than 32 chars,
// the just break out. We'll come back here later to hit this again
// and give an error much closer to the real source position.
//
if (countDone > 32)
break;
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*srcPtr, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
// Set the bytes we ate
bytesEaten = countDone;
// Set the char sizes to the fixed size
memset(charSizes, 1, countDone);
// Return the chars we transcoded
return countDone;
}
