valuenostl.cpp

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.
  *
  ***********************************************************************/
 

 #define VXIVALUE_EXPORTS
 #include "Value.hpp"
 
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 
 /**
  * Abstractions for VXIchar
  */
 #define _UNICODE
 #ifdef _UNICODE
 #define VXIcharStrlen  wcslen
 #define VXIcharStrcpy  wcscpy
 #define VXIcharStrcmp  wcscmp
 #else
 #define VXIcharStrlen  strlen
 #define VXIcharStrcpy  strcpy
 #define VXIcharStrcmp  strcmp
 #endif
 
 /**
  * Real VXIString class
  */
 
 class VXIString : public VXIValue {
  public:
   // Constructor and destructor
   VXIString (const VXIchar *v)
     : VXIValue (VALUE_STRING), value(NULL), length(0) 
   {
     if (( v ) && ( (value = new VXIchar [VXIcharStrlen (v) + 1]) != NULL )) {
       VXIcharStrcpy (value, v);
       length = VXIcharStrlen (v);
     }
   }
 
   VXIString (const VXIchar *v, VXIunsigned u)
     : VXIValue (VALUE_STRING), value(NULL), length(u)
   {
     if (( v ) && ( (value = new VXIchar [u + 1]) != NULL )) {
       for (unsigned int i = 0; i < u; ++i) value[i] = v[i];
       value[u] = '\0';
     }
   }
 
   virtual ~VXIString( ) { if ( value ) { delete [] value; value = NULL; } }
 
   // Get the length of the string
   VXIunsigned GetLength( ) const       { return length; }
 
   // Get and set the value
   const VXIchar *GetValue( ) const { return value; }
   void SetValue (const VXIchar *v) { 
     if ( value ) { delete [] value; value = NULL; length = 0; }
     if (( v ) && ( (value = new VXIchar [VXIcharStrlen (v) + 1]) != NULL )) {
       VXIcharStrcpy (value, v);
       length = VXIcharStrlen (v);
     }
   }
 
   // Comparison methods, equivalent to strcmp( )
   int Compare (const VXIString &s) const { 
     return VXIcharStrcmp (value, s.value); }
   int Compare (const VXIchar *s) const { 
     return VXIcharStrcmp (value, s); }
 
   // Copy constructor and assignment operator
   VXIString (const VXIString &v) : VXIValue (VALUE_STRING), value(NULL) {
     if (( v.value ) && 
 	( (value = new VXIchar [v.length + 1]) != NULL )) {
       for (unsigned int i = 0; i < v.length + 1; ++i) value[i] = v.value[i];
       length = v.length;
     }
   }
   VXIString & operator= (const VXIString &v) {
     if ( this != &v ) {
       if ( value ) { delete [] value; value = NULL; length = 0; }
       if (( v.value ) && 
 	  ( (value = new VXIchar [v.length + 1]) != NULL )) {
         for (unsigned int i = 0; i < v.length + 1; ++i) value[i] = v.value[i];
         length = v.length;
       }
     }
     return *this;
   }
 
   // Overrides of comparison operators for VXIMapElement use
   virtual bool operator< (const VXIString &s) const {
     return (Compare (s) < 0 ? true : false);
   }
   virtual bool operator== (const VXIString &s) const { 
     return (Compare (s) == 0 ? true : false);
   }
   virtual bool operator!= (const VXIString &s) const { 
     return (Compare (s) != 0 ? true : false);
   }
 
  private:
   VXIchar *value;
   unsigned int length;
 };
 
 
 /**
  * Real VXIMap and supporting classes
  */
 
 class VXIElement {
  public:
   // Constructor and destructor
   VXIElement (const VXIchar *k, VXIValue *v) : 
     key(k), value(v), next(NULL) { }
   VXIElement (const VXIString &k, VXIValue *v) : 
     key(k), value(v), next(NULL) { }
   ~VXIElement( ) { value = NULL; }
 
   // Get the key and value
   const VXIString &GetKey( ) const { return key; }
   const VXIValue *GetValue( ) const { return value; }
 
   // Destroy the value
   void DestroyValue( ) { if ( value ) VXIValueDestroy (&value); }
 
   // Get and set the next element pointer
   VXIElement *GetNext( ) const { return next; }
   void SetNext (VXIElement *e) { next = e; }
 
   // Overrides of comparison operators for finding elements based on
   // the key name
   virtual bool operator< (const VXIElement &e) const {
     return key < e.key;
   }
   virtual bool operator== (const VXIElement &e) const { 
     return key == e.key;
   }
   virtual bool operator!= (const VXIElement &e) const { 
     return key != e.key;
   }
 
  private:
   // Stubs to prevent copy constructor and assignment operator use
   VXIElement (const VXIElement &e);
   VXIElement & operator= (const VXIElement &e);
 
  private:
   VXIString      key;
   VXIValue      *value;
   VXIElement    *next;
 };
 
 class VXIMap : public VXIValue {
  public:
   // Constructor and destructor
   VXIMap( ) : VXIValue (VALUE_MAP), badState(false), size(0),
 		 head(NULL) { }
   virtual ~VXIMap( );
 
   // Copy constructor
   VXIMap (const VXIMap &m);
 
  private:
   // Stub to prevent assignment operator use, use the copy constructor
   VXIMap & operator= (const VXIMap &m);
 
  public:
   bool              badState;
   unsigned long     size;
   VXIElement       *head;
 };
 
 VXIMap::~VXIMap( )
 {
   VXIElement *cur = head, *next;
   while (cur) {
     next = cur->GetNext( );
     cur->DestroyValue( );
     delete cur;
     cur = next;
   }
 }
 
 VXIMap::VXIMap (const VXIMap &m) : 
   VXIValue (VALUE_MAP), badState(false), size(0), head(NULL)
 {
   VXIElement *src = m.head, *prev = NULL, *dest;
   while (src) {
     dest = new VXIElement (src->GetKey( ), VXIValueClone (src->GetValue( )));
     if ( dest == NULL ) {
       badState = true;
       return;
     } else if (( dest->GetKey( ).GetLength( ) == 0 ) ||
 	       ( dest->GetValue( ) == NULL )) {
       dest->DestroyValue( );
       delete dest;
       badState = true;
       return;
     }
 
     if ( prev == NULL )
       head = dest;
     else
       prev->SetNext (dest);
 
     prev = dest;
     src = src->GetNext( );
   }
 
   size = m.size;
 }
 
 
 class VXIMapIterator {
  public:
   // Constructor and destructor
   VXIMapIterator(const VXIMap *o) : curElement(o->head) { }
   virtual ~VXIMapIterator( ) { }
 
   // Get the key and value at the iterator's position
   VXIvalueResult GetKeyValue (const VXIchar **key, 
 			      const VXIValue **value) const {
     if ( curElement == NULL ) {
       *key = NULL;
       *value = NULL;
       return VXIvalue_RESULT_FAILURE;
     }
 
     *key = curElement->GetKey( ).GetValue( );
     *value = curElement->GetValue( );
     return VXIvalue_RESULT_SUCCESS;
   }
 
   // Increment the iterator
   VXIMapIterator &operator++(int) { 
     if ( curElement != NULL )
       curElement = curElement->GetNext( ); 
     return *this; }
 
  private:
   const VXIElement *curElement;
 };
 
 
 /**
  * Real VXIVector and supporting classes
  */
 
 class VXIVector : public VXIValue {
  public:
   static const int GROW_SIZE;
 
  public:
   // Constructor and destructor
   VXIVector( ) : VXIValue (VALUE_VECTOR), badState(false), size(0), 
     allocated(0), data(NULL) { }
   virtual ~VXIVector( );
 
   // Copy constructor
   VXIVector (const VXIVector &v);
 
   // Add an element
   VXIvalueResult Add (VXIValue *v);
 
  private:
   // Stub to prevent assignment operator use, use the copy constructor
   VXIMap & operator= (const VXIMap &o);
 
  public:
   bool              badState;
   unsigned long     size;
   unsigned long     allocated;
   VXIElement       *data;
 };
 
 const int VXIVector::GROW_SIZE = 8;
 
 // Special new operator required by VXIVector, used to simply allow
 // us to allocate our own memory for the vector data storage, and
 // the matching delete
 inline void *operator new (size_t, void *p) { return p; }
 inline void operator delete(void *, void *) { }
 
 VXIVector::~VXIVector( )
 { 
   if ( data ) {
     // Explicit destructor of each held item which does the standard
     // destruction of delete( ) but skips the memory free since we
     // provided the memory ourselves
     for (unsigned long i = 0; i < size; i++) {
       data[i].DestroyValue( );
       data[i].~VXIElement( );
     }
 
     // Now free the memory for the vector
     free (data);
   }
 }
 
 VXIVector::VXIVector (const VXIVector &v) : 
   VXIValue (VALUE_VECTOR), badState(false), size(0), allocated(0), data(NULL)
 {
   if ( v.size > 0 ) {
     // Allocate just enough memory to store the vector we're copying, we're
     // making a guess that they will just hold onto this clone instead of
     // adding additional elements to it
     data = (VXIElement *) malloc (v.size * sizeof (VXIElement));
     if ( data == NULL ) {
       badState = true;
       return;
     }
     allocated = v.size; 
 
     // Now copy the elements
     while ( size < v.size ) {
       // Set the new element using a new operator with placement syntax
       // so it does the standard initialization of new( ) but skips the
       // allocation, instead using the memory we provide
       VXIElement *element = new (&data[size]) 
 	VXIElement (v.data[size].GetKey( ),
 		    VXIValueClone (v.data[size].GetValue( )));
       size++;
     }
   }
 }
 
 
 VXIvalueResult VXIVector::Add (VXIValue *val)
 {
   // Reallocate memory for the vector if required
   if ( allocated <= size ) {
     VXIElement *ptr = (VXIElement *)
       realloc (data, (size + VXIVector::GROW_SIZE) * 
 	       sizeof (VXIElement));
     if ( ptr == NULL )
       return VXIvalue_RESULT_OUT_OF_MEMORY;
     
     data = ptr;
     allocated = size + VXIVector::GROW_SIZE;
   }
 
   // Set the new element using a new operator with placement syntax
   // so it does the standard initialization of new( ) but skips the
   // allocation, instead using the memory we provide