XMLFormatter.cpp
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- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /**
- * $Id: XMLFormatter.cpp,v 1.12 2003/05/16 21:36:55 knoaman Exp $
- */
- // ---------------------------------------------------------------------------
- // Includes
- // ---------------------------------------------------------------------------
- #include <xercesc/util/PlatformUtils.hpp>
- #include <xercesc/util/XMLUniDefs.hpp>
- #include <xercesc/util/XMLString.hpp>
- #include <xercesc/util/TransService.hpp>
- #include <xercesc/util/TranscodingException.hpp>
- #include <xercesc/util/XMLExceptMsgs.hpp>
- #include <xercesc/framework/XMLFormatter.hpp>
- #include <xercesc/util/Janitor.hpp>
- #include <xercesc/util/XMLChar.hpp>
- #include <string.h>
- XERCES_CPP_NAMESPACE_BEGIN
- // ---------------------------------------------------------------------------
- // Local data
- //
- // gXXXRef
- // These are hard coded versions of the char refs we put out for the
- // standard char refs.
- //
- // gEscapeChars
- // For each style of escape, we have a list of the chars that must
- // be escaped for that style. The first null hit in each list indicates
- // no more valid entries in that list. The first entry is a dummy for
- // the NoEscapes style.
- // ---------------------------------------------------------------------------
- static const XMLCh gAmpRef[] =
- {
- chAmpersand, chLatin_a, chLatin_m, chLatin_p, chSemiColon, chNull
- };
- static const XMLCh gAposRef[] =
- {
- chAmpersand, chLatin_a, chLatin_p, chLatin_o, chLatin_s, chSemiColon, chNull
- };
- static const XMLCh gGTRef[] =
- {
- chAmpersand, chLatin_g, chLatin_t, chSemiColon, chNull
- };
- static const XMLCh gLTRef[] =
- {
- chAmpersand, chLatin_l, chLatin_t, chSemiColon, chNull
- };
- static const XMLCh gQuoteRef[] =
- {
- chAmpersand, chLatin_q, chLatin_u, chLatin_o, chLatin_t, chSemiColon, chNull
- };
- static const unsigned int kEscapeCount = 6;
- static const XMLCh gEscapeChars[XMLFormatter::EscapeFlags_Count][kEscapeCount] =
- {
- { chNull , chNull , chNull , chNull , chNull , chNull }
- , { chAmpersand , chCloseAngle , chDoubleQuote , chOpenAngle , chSingleQuote , chNull }
- , { chAmpersand , chOpenAngle , chDoubleQuote , chNull , chNull , chNull }
- , { chAmpersand , chOpenAngle , chNull , chNull , chNull , chNull }
- };
- // ---------------------------------------------------------------------------
- // Local methods
- // ---------------------------------------------------------------------------
- bool XMLFormatter::inEscapeList(const XMLFormatter::EscapeFlags escStyle
- , const XMLCh toCheck)
- {
- const XMLCh* escList = gEscapeChars[escStyle];
- while (*escList)
- {
- if (*escList++ == toCheck)
- return true;
- }
- /***
- * XML1.1
- *
- * Finally, there is considerable demand to define a standard representation of
- * arbitrary Unicode characters in XML documents. Therefore, XML 1.1 allows the
- * use of character references to the control characters #x1 through #x1F,
- * most of which are forbidden in XML 1.0. For reasons of robustness, however,
- * these characters still cannot be used directly in documents.
- * In order to improve the robustness of character encoding detection, the
- * additional control characters #x7F through #x9F, which were freely allowed in
- * XML 1.0 documents, now must also appear only as character references.
- * (Whitespace characters are of course exempt.) The minor sacrifice of backward
- * compatibility is considered not significant.
- * Due to potential problems with APIs, #x0 is still forbidden both directly and
- * as a character reference.
- *
- ***/
- if (fIsXML11)
- {
- // for XML11
- if ( XMLChar1_1::isControlChar(toCheck, 0) &&
- !XMLChar1_1::isWhitespace(toCheck, 0) )
- {
- return true;
- }
- else
- {
- return false;
- }
- }
- else
- {
- return false;
- }
- }
- // ---------------------------------------------------------------------------
- // XMLFormatter: Constructors and Destructor
- // ---------------------------------------------------------------------------
- XMLFormatter::XMLFormatter( const char* const outEncoding
- , const char* const docVersion
- , XMLFormatTarget* const target
- , const EscapeFlags escapeFlags
- , const UnRepFlags unrepFlags
- , MemoryManager* const manager)
- : fEscapeFlags(escapeFlags)
- , fOutEncoding(0)
- , fTarget(target)
- , fUnRepFlags(unrepFlags)
- , fXCoder(0)
- , fAposRef(0)
- , fAposLen(0)
- , fAmpRef(0)
- , fAmpLen(0)
- , fGTRef(0)
- , fGTLen(0)
- , fLTRef(0)
- , fLTLen(0)
- , fQuoteRef(0)
- , fQuoteLen(0)
- , fIsXML11(false)
- , fMemoryManager(manager)
- {
- // Transcode the encoding string
- fOutEncoding = XMLString::transcode(outEncoding, fMemoryManager);
- // Try to create a transcoder for this encoding
- XMLTransService::Codes resCode;
- fXCoder = XMLPlatformUtils::fgTransService->makeNewTranscoderFor
- (
- fOutEncoding
- , resCode
- , kTmpBufSize
- , fMemoryManager
- );
- if (!fXCoder)
- {
- fMemoryManager->deallocate(fOutEncoding); //delete [] fOutEncoding;
- ThrowXML1
- (
- TranscodingException
- , XMLExcepts::Trans_CantCreateCvtrFor
- , outEncoding
- );
- }
- XMLCh* const tmpDocVer = XMLString::transcode(docVersion, fMemoryManager);
- ArrayJanitor<XMLCh> jname(tmpDocVer, fMemoryManager);
- fIsXML11 = XMLString::equals(tmpDocVer, XMLUni::fgVersion1_1);
- }
- XMLFormatter::XMLFormatter( const XMLCh* const outEncoding
- , const XMLCh* const docVersion
- , XMLFormatTarget* const target
- , const EscapeFlags escapeFlags
- , const UnRepFlags unrepFlags
- , MemoryManager* const manager)
- : fEscapeFlags(escapeFlags)
- , fOutEncoding(0)
- , fTarget(target)
- , fUnRepFlags(unrepFlags)
- , fXCoder(0)
- , fAposRef(0)
- , fAposLen(0)
- , fAmpRef(0)
- , fAmpLen(0)
- , fGTRef(0)
- , fGTLen(0)
- , fLTRef(0)
- , fLTLen(0)
- , fQuoteRef(0)
- , fQuoteLen(0)
- , fIsXML11(false)
- , fMemoryManager(manager)
- {
- // Try to create a transcoder for this encoding
- XMLTransService::Codes resCode;
- fXCoder = XMLPlatformUtils::fgTransService->makeNewTranscoderFor
- (
- outEncoding
- , resCode
- , kTmpBufSize
- , fMemoryManager
- );
- if (!fXCoder)
- {
- ThrowXML1
- (
- TranscodingException
- , XMLExcepts::Trans_CantCreateCvtrFor
- , outEncoding
- );
- }
- // Copy the encoding string
- fOutEncoding = XMLString::replicate(outEncoding, fMemoryManager);
- fIsXML11 = XMLString::equals(docVersion, XMLUni::fgVersion1_1);
- }
- XMLFormatter::~XMLFormatter()
- {
- fMemoryManager->deallocate(fAposRef); //delete [] fAposRef;
- fMemoryManager->deallocate(fAmpRef); //delete [] fAmpRef;
- fMemoryManager->deallocate(fGTRef); //delete [] fGTRef;
- fMemoryManager->deallocate(fLTRef); //delete [] fLTRef;
- fMemoryManager->deallocate(fQuoteRef); //delete [] fQuoteRef;
- fMemoryManager->deallocate(fOutEncoding); //delete [] fOutEncoding;
- delete fXCoder;
- // We DO NOT own the target object!
- }
- // ---------------------------------------------------------------------------
- // XMLFormatter: Formatting methods
- // ---------------------------------------------------------------------------
- void
- XMLFormatter::formatBuf(const XMLCh* const toFormat
- , const unsigned int count
- , const EscapeFlags escapeFlags
- , const UnRepFlags unrepFlags)
- {
- //
- // Figure out the actual escape flag value. If the parameter is not
- // the default, then take it. Else take the current default.
- //
- const EscapeFlags actualEsc = (escapeFlags == DefaultEscape)
- ? fEscapeFlags : escapeFlags;
- // And do the same for the unrep flags
- const UnRepFlags actualUnRep = (unrepFlags == DefaultUnRep)
- ? fUnRepFlags : unrepFlags;
- //
- // If the actual unrep action is that they want to provide char refs
- // for unrepresentable chars, then this one is a much more difficult
- // one to do cleanly, and we handle it separately.
- //
- if (actualUnRep == UnRep_CharRef)
- {
- specialFormat(toFormat, count, actualEsc);
- return;
- }
- //
- // If we don't have any escape flags set, then we can do the most
- // efficient loop, else we have to do it the hard way.
- //
- const XMLCh* srcPtr = toFormat;
- const XMLCh* endPtr = toFormat + count;
- if (actualEsc == NoEscapes)
- {
- //
- // Just do a whole buffer at a time into the temp buffer, cap
- // it off, and send it to the target.
- //
- if (srcPtr < endPtr)
- srcPtr += handleUnEscapedChars(srcPtr, endPtr - srcPtr, actualUnRep);
- }
- else
- {
- //
- // Escape chars that require it according tot he scale flags
- // we were given. For the others, try to accumulate them and
- // format them in as big as bulk as we can.
- //
- while (srcPtr < endPtr)
- {
- //
- // Run a temp pointer up until we hit a character that we have
- // to escape. Then we can convert all the chars between our
- // current source pointer and here all at once.
- //
- const XMLCh* tmpPtr = srcPtr;
- while (!inEscapeList(actualEsc, *tmpPtr) && (tmpPtr < endPtr))
- tmpPtr++;
- //
- // If we got any chars, then lets convert them and write them
- // out.
- //
- if (tmpPtr > srcPtr)
- srcPtr += handleUnEscapedChars(srcPtr, tmpPtr - srcPtr,
- actualUnRep);
- else if (tmpPtr < endPtr)
- {
- //
- // Ok, so we've hit a char that must be escaped. So do
- // this one specially.
- //
- const XMLByte * theChars;
- switch (*srcPtr) {
- case chAmpersand :
- theChars = getCharRef(fAmpLen, fAmpRef, gAmpRef);
- fTarget->writeChars(theChars, fAmpLen, this);
- break;
- case chSingleQuote :
- theChars = getCharRef(fAposLen, fAposRef, gAposRef);
- fTarget->writeChars(theChars, fAposLen, this);
- break;
- case chDoubleQuote :
- theChars = getCharRef(fQuoteLen, fQuoteRef, gQuoteRef);
- fTarget->writeChars(theChars, fQuoteLen, this);
- break;
- case chCloseAngle :
- theChars = getCharRef(fGTLen, fGTRef, gGTRef);
- fTarget->writeChars(theChars, fGTLen, this);
- break;
- case chOpenAngle :
- theChars = getCharRef(fLTLen, fLTRef, gLTRef);
- fTarget->writeChars(theChars, fLTLen, this);
- break;
- default:
- // control characters
- writeCharRef(*srcPtr);
- break;
- }
- srcPtr++;
- }
- }
- }
- }
- unsigned int
- XMLFormatter::handleUnEscapedChars(const XMLCh * srcPtr,
- const unsigned int oCount,
- const UnRepFlags actualUnRep)
- {
- //
- // Use that to figure out what I should pass to the transcoder. If we
- // are doing character references or failing for unrepresentable chars,
- // then we just throw, since we should never get a call for something
- // we cannot represent. Else, we tell it to just use the replacement
- // char.
- //
- const XMLTranscoder::UnRepOpts unRepOpts = (actualUnRep == UnRep_Replace)
- ? XMLTranscoder::UnRep_RepChar
- : XMLTranscoder::UnRep_Throw;
-
- unsigned int charsEaten;
- unsigned int count = oCount;
-
- while (count) {
- const unsigned srcChars
- = count > kTmpBufSize ? kTmpBufSize : count;
-
- const unsigned int outBytes
- = fXCoder->transcodeTo(srcPtr, srcChars,
- fTmpBuf, kTmpBufSize,
- charsEaten, unRepOpts);
-
- if (outBytes) {
- fTmpBuf[outBytes] = 0; fTmpBuf[outBytes + 1] = 0;
- fTmpBuf[outBytes + 2] = 0; fTmpBuf[outBytes + 3] = 0;
- fTarget->writeChars(fTmpBuf, outBytes, this);
- }
-
- srcPtr += charsEaten;
- count -= charsEaten;
- }
-
- return oCount; // This should be an assertion that count == 0.
- }
-
-
- XMLFormatter& XMLFormatter::operator<<(const XMLCh* const toFormat)
- {
- const unsigned int len = XMLString::stringLen(toFormat);
- formatBuf(toFormat, len);
- return *this;
- }
- XMLFormatter& XMLFormatter::operator<<(const XMLCh toFormat)
- {
- // Make a temp string format that
- XMLCh szTmp[2];
- szTmp[0] = toFormat;
- szTmp[1] = 0;
- formatBuf(szTmp, 1);
- return *this;
- }
- /**
- * the parameter, count, is needed since stringLen()
- * does not work on a BOM like "0xFE0xFF0x000x00" or
- * "0x000x000xFF0xFE"
- **/
- void XMLFormatter::writeBOM(const XMLByte* const toFormat
- , const unsigned int count)
- {
- fTarget->writeChars(toFormat, count, this);
- }
- // ---------------------------------------------------------------------------
- // XMLFormatter: Private helper methods
- // ---------------------------------------------------------------------------
- const void XMLFormatter::writeCharRef(const XMLCh &toWrite)
- {
- XMLCh tmpBuf[32];
- tmpBuf[0] = chAmpersand;
- tmpBuf[1] = chPound;
- tmpBuf[2] = chLatin_x;
- // Build a char ref for the current char
- XMLString::binToText(toWrite, &tmpBuf[3], 8, 16);
- const unsigned int bufLen = XMLString::stringLen(tmpBuf);
- tmpBuf[bufLen] = chSemiColon;
- tmpBuf[bufLen+1] = chNull;
- // write it out
- formatBuf(tmpBuf
- , bufLen + 1
- , XMLFormatter::NoEscapes
- , XMLFormatter::UnRep_Fail);
- }
- const XMLByte* XMLFormatter::getCharRef(unsigned int & count,
- XMLByte* &ref,
- const XMLCh * stdRef)
- {
- if (!ref) {
- unsigned int charsEaten;
- const unsigned int outBytes =
- fXCoder->transcodeTo(stdRef, XMLString::stringLen(stdRef),
- fTmpBuf, kTmpBufSize, charsEaten,
- XMLTranscoder::UnRep_Throw);
- fTmpBuf[outBytes] = 0;
- fTmpBuf[outBytes + 1] = 0;
- fTmpBuf[outBytes + 2] = 0;
- fTmpBuf[outBytes + 3] = 0;
- ref = (XMLByte*) fMemoryManager->allocate
- (
- (outBytes + 4) * sizeof(XMLByte)
- );//new XMLByte[outBytes + 4];
- memcpy(ref, fTmpBuf, outBytes + 4);
- count = outBytes;
- }
- return ref;
- }
- void XMLFormatter::specialFormat(const XMLCh* const toFormat
- , const unsigned int count
- , const EscapeFlags escapeFlags)
- {
- //
- // We have to check each character and see if it could be represented.
- // As long as it can, we just keep up with where we started and how
- // many chars we've checked. When we hit an unrepresentable one, we
- // stop, transcode everything we've collected, then start handling
- // the unrepresentables via char refs. We repeat this until we get all
- // the chars done.
- //
- const XMLCh* srcPtr = toFormat;
- const XMLCh* endPtr = toFormat + count;
- while (srcPtr < endPtr)
- {
- const XMLCh* tmpPtr = srcPtr;
- while (tmpPtr < endPtr)
- {
- if (fXCoder->canTranscodeTo(*tmpPtr))
- tmpPtr++;
- else
- break;
- }
- if (tmpPtr > srcPtr)
- {
- // We got at least some chars that can be done normally
- formatBuf
- (
- srcPtr
- , tmpPtr - srcPtr
- , escapeFlags
- , XMLFormatter::UnRep_Fail
- );
- // Update the source pointer to our new spot
- srcPtr = tmpPtr;
- }
- else
- {
-
- // We hit something unrepresentable. So continue forward doing
- // char refs until we hit something representable again or the
- // end of input.
- //
- while (srcPtr < endPtr)
- {
- writeCharRef(*srcPtr);
- // Move up the source pointer and break out if needed
- srcPtr++;
- if (fXCoder->canTranscodeTo(*srcPtr))
- break;
- }
- }
- }
- }
- XERCES_CPP_NAMESPACE_END