xmlchconverter.hpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

 /****************License************************************************
  *
  * Copyright 2000-2003.  ScanSoft, Inc.    
  *
  * Use of this software is subject to notices and obligations set forth 
  * in the SpeechWorks Public License - Software Version 1.2 which is 
  * included with this software. 
  *
  * ScanSoft is a registered trademark of ScanSoft, Inc., and OpenSpeech, 
  * SpeechWorks and the SpeechWorks logo are registered trademarks or 
  * trademarks of SpeechWorks International, Inc. in the United States 
  * and other countries.
  *
  ***********************************************************************/
 
#ifndef __XMLChar_Converter_HPP__
 #define __XMLChar_Converter_HPP__
 
 #include "VXItypes.h"                 // for VXIchar
 
 #ifndef HAVE_XERCES
 #error Need Apache Xerces to build the VoiceXML interpreter
 #endif
 
 #include <util/XercesDefs.hpp>        // for XMLCh
 #include <util/XMLString.hpp>         // for XMLString
 using namespace xercesc;
 
 // Xerces specifies that XMLCh must be able to store UTF-16 characters.
 // VXIchar should be the general wide character representation (wchar_t) of the
 // platform.  As wchar_t may be other types, conversion functions are
 // necessary.
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 // The native Solaris and Linux wide character encoding is UTF-32.  This
 // provides an imperfect conversion from UTF-16 to UTF-32, ignoring all
 // surrogate pairs.
 
 #if defined(__linux__) || \
     defined(SOLARIS) || defined(__SVR4) || defined(UNIXWARE) || \
     defined(_decunix_)
 #define UTF16TO32
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 // Windows uses UTF-16 (or UCS-2 which is nearly equivalent), so no conversion
 // is necessary.
 #elif defined(XML_WIN32)
 #define NOCONVERSION
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 #else
 #error Platform not supported.
 #endif
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 #if defined(NOCONVERSION)
 #include <cstring>
 
 inline bool Compare(const XMLCh * x, const VXIchar * y)
 { return wcscmp(x, y) == 0; }
 
 struct VXIcharToXMLCh {
   const XMLCh * c_str() const                 { return cstr; }
   VXIcharToXMLCh(const VXIchar * x) : cstr(x) { if (cstr != NULL && cstr[0] == 0xFEFF) ++cstr; }
   ~VXIcharToXMLCh()                           { }
 
 private:
   const XMLCh * cstr;
   VXIcharToXMLCh(const VXIcharToXMLCh &);
   VXIcharToXMLCh& operator=(const VXIcharToXMLCh &);
 };
 
 struct XMLChToVXIchar {
   const VXIchar * c_str() const             { return cstr; }
   XMLChToVXIchar(const XMLCh * x) : cstr(x) { }
   ~XMLChToVXIchar() { }
 
 private:
   const VXIchar * cstr;
   XMLChToVXIchar(const XMLChToVXIchar &);
   XMLChToVXIchar& operator=(const XMLChToVXIchar &);
 };
 
 #endif /* NOCONVERSION */
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 #if defined(UTF16TO32)
 #include <ostream>
 
 inline bool Compare(const XMLCh * x, const VXIchar * y)
 {
   if (x == NULL && y == NULL) return true;
   if (x == NULL && *y == '\0') return true;
   if (y == NULL && *x == '\0') return true;
   if (y == NULL || x == NULL) return false;
 
   while (*x && *y && VXIchar(*x) == *y) ++x, ++y;
   if (*x || *y) return false;
   return true;
 }
 
 
 struct VXIcharToXMLCh {
   const XMLCh * c_str() const { return cstr; }
 
   VXIcharToXMLCh(const VXIchar * x) : cstr(NULL)
   {
     if (x == NULL) return;
     unsigned int len = wcslen(x) + 1;
     cstr = new XMLCh[len];
     if (cstr == NULL) return;
     for (unsigned int i = 0; i < len; ++i)
       // We throw out any surrogate characters (0xD800 - 0xDFFF)
       cstr[i] = ((x[i] ^ 0xD800) < 0x0100) ? XMLCh(0xBF) : XMLCh(x[i]);
   }
   ~VXIcharToXMLCh() { delete [] cstr; }
 
 private:
   XMLCh * cstr;
   VXIcharToXMLCh(const VXIcharToXMLCh &);
   VXIcharToXMLCh& operator=(const VXIcharToXMLCh &);
 };
 
 
 struct XMLChToVXIchar {
   const VXIchar * c_str() const { return cstr; }
 
   XMLChToVXIchar(const XMLCh * x) : cstr(NULL)
   {
     if (x == NULL) return;
     unsigned int len = XMLString::stringLen(x) + 1;
     cstr = new VXIchar[len];
     if (cstr == NULL) return;
     
     unsigned int i = 0;
     if (x[0] == 0xFEFF) ++i;
     for (unsigned j = 0; i < len; ++i, ++j)
       // We throw out anything above 0xFFFF
       cstr[j] = (x[i] != 0 && (x[i] & ~XMLCh(0xFFFF))) ? VXIchar(0xBE)
                                                        : VXIchar(x[i]);
   }
   ~XMLChToVXIchar() { delete [] cstr; }
 
 private:
   VXIchar * cstr;
   XMLChToVXIchar(const XMLChToVXIchar &);
   XMLChToVXIchar& operator=(const XMLChToVXIchar &);
 };
 
 #endif /* UTF16TO32 */
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 inline std::basic_ostream<VXIchar>& operator<<(std::basic_ostream<VXIchar>& os,
 					       const XMLChToVXIchar & val)
 { return os << val.c_str(); }
 
 class xmlcharstring {
 public:
   // constructors
   xmlcharstring(const XMLCh* s) : data(NULL), len(0) {
 	  storeit(s);
   }
   xmlcharstring() : data(NULL), len(0) {}
   xmlcharstring(const xmlcharstring &x) : data(NULL), len(0) {
     if( !x.empty() ) storeit(x.c_str());
   }
   
   // destructor
   ~xmlcharstring() {
     clear();
   }
   
   // members
   bool empty(void) const { return (len == 0); }
   size_t length(void) const { return len; }
   const XMLCh* c_str(void) const { return (data ? data : (const XMLCh*)""); }
   void clear(void) {
     if( data ) ::free(data);
     data = NULL;
     len = 0;
   }   
   const XMLCh operator[](unsigned int i) const { return data[i]; }    
     
   // copy assignment
   xmlcharstring & operator=(const XMLCh* s) {
     clear();
     storeit(s);
     return *this;     
   }
   xmlcharstring & operator=(const xmlcharstring &x) {
     if( this != &x ) {
       clear();
       if( !x.empty() ) storeit(x.c_str());
     }
     return *this;
   }
   
   // operators
   xmlcharstring & operator+(const XMLCh* s) {
     storeit(s, true); // store and preserve old content
     return *this;     
   }  
   xmlcharstring & operator+=(const XMLCh* s) {
     storeit(s, true);
     return *this;
   } 
   xmlcharstring & operator+(const xmlcharstring & x) {
     if( !x.empty() ) storeit(x.c_str(), true);
     return *this;
   } 
   xmlcharstring & operator+=(const xmlcharstring & x) {
     if( !x.empty() ) storeit(x.c_str(), true);
     return *this;
   } 
   
   // comparison
   bool operator==(const XMLCh* s) {
     return (XMLString::compareString(data, s) == 0);
   }
   bool operator==(const xmlcharstring & x) {
     return operator==(x.c_str());
   }
   bool operator>(const XMLCh* s) {
     return (XMLString::compareString(data, s) > 0);
   }
   bool operator>(const xmlcharstring & x) {
     return operator>(x.c_str());
   }
   bool operator<(const XMLCh* s) {
     return !operator>(s);
   }
   bool operator<(const xmlcharstring & x) {
     return !operator>(x);
   }
   
 private:
   void storeit(const XMLCh* s, bool preserve = false) {
     if( s ) {
       if( !preserve ) {
         clear();
         len = XMLString::stringLen(s);
         data = (XMLCh*)::malloc(sizeof(XMLCh)*(len+1)); 
         XMLString::copyString(data, s);        
       }
       else {
         size_t plen = len;
         len += XMLString::stringLen(s);
         XMLCh* ptr = (XMLCh*)::realloc(data, sizeof(XMLCh)*(len+1)); 
         data = ptr;
         XMLString::copyString(&data[plen], s);        
       }
     }
   }
   
 private:
   XMLCh* data;
   size_t len;     
 };
 
 #endif