valuestl.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 <stdlib.h>
 
 // STL headers
 #include <string>
 #include <map>
 #include <vector>
 #include <algorithm>
 
 // Definition of string to use, based on VXIchar choice
 #define STL_STRING  std::basic_string<VXIchar>
 #define STRNCPY     wcsncpy
 
 /**
  * Real VXIString class
  */
 
 class VXIString : public VXIValue {
  public:
   // Constructor and destructor
   VXIString (const STL_STRING &v) : VXIValue (VALUE_STRING), value(v) { }
   VXIString (const VXIchar * v, VXIunsigned u)
     : VXIValue (VALUE_STRING), value(v, u) { }
   virtual ~VXIString( ) { }
 
   // Get the length of the string
   VXIunsigned GetLength( ) const { return value.length( ); }
 
   // Get and set the value
   const STL_STRING &GetValue( ) const { return value; }
   void SetValue (const STL_STRING &v) { value = v; }
 
  private:
   STL_STRING  value;
 };
 
 
 /**
  * Real VXIMap and supporting classes
  */
 
 class VXIMap : public VXIValue {
  public:
   // Constructor and destructor
   VXIMap( ) : VXIValue (VALUE_MAP), container( ) { }
   virtual ~VXIMap( );
 
   // Copy constructor
   VXIMap (const VXIMap &m);
 
  public:
   typedef std::map<STL_STRING, VXIValue *> MAP;
   MAP container;
 };
 
 
 VXIMap::~VXIMap( )
 {
   // Must manually deep destroy values
   MAP::iterator vi;
   for (vi = container.begin( ); vi != container.end( ); vi++)
     delete (*vi).second;
 }
 
 
 VXIMap::VXIMap (const VXIMap &m) : VXIValue (VALUE_MAP), container()
 {
   // Must manually deep copy values
   MAP::const_iterator vi;
   for (vi = m.container.begin( ); vi != m.container.end( ); vi++) {
     VXIValue *v = VXIValueClone ((*vi).second);
     if ( v ) {
       MAP::value_type element ((*vi).first, v);
       container.insert (element);
     } else {
       return;
     }
   }
 }
 
 
 class VXIMapIterator {
  public:
   // Constructor and destructor
   VXIMapIterator(const VXIMap *m) : 
     map(m), mapIterator(m->container.begin( )) { }
   virtual ~VXIMapIterator( ) { }
 
   // Get the key and value at the iterator's position
   VXIvalueResult GetKeyValue (const VXIchar **key, 
 			      const VXIValue **value) const {
     if ( mapIterator == map->container.end( ) ) {
       *key = NULL;
       *value = NULL;
       return VXIvalue_RESULT_FAILURE;
     }
 
     *key = (*mapIterator).first.c_str( );
     *value = (*mapIterator).second;
     return VXIvalue_RESULT_SUCCESS;
   }
 
   // Increment the iterator
   VXIMapIterator &operator++(int) { 
     if ( mapIterator != map->container.end( ) )
       mapIterator++; 
     return *this; }
 
  private:
   const VXIMap *map;
   VXIMap::MAP::const_iterator mapIterator;
 };
 
 
 /**
  * Real VXIVector and supporting classes
  */
 
 class VXIVector : public VXIValue {
  public:
   // Constructor and destructor
   VXIVector( ) : VXIValue (VALUE_VECTOR), container( ) { }
   virtual ~VXIVector( );
 
   // Copy constructor
   VXIVector (const VXIVector &v);
 
  public:
   typedef std::vector<VXIValue *> VECTOR;
   VECTOR container;
 };
 
 
 VXIVector::~VXIVector( )
 {
   // Must manually deep destroy values
   VECTOR::iterator vi;
   for (vi = container.begin( ); vi != container.end( ); vi++)
     delete *vi;
 }
 
 
 VXIVector::VXIVector (const VXIVector &v) : VXIValue(VALUE_VECTOR), container()
 {
   // Must manually deep copy values
   VECTOR::const_iterator vi;
   for (vi = v.container.begin( ); vi != v.container.end( ); vi++) {
     VXIValue *v = VXIValueClone (*vi);
     if ( v ) {
       container.push_back(v);
     } else {
       return;
     }
   }
 }
 
 
 /**
  * Create a String from a null-terminated character array
  *
  * @param   str   NULL-terminated character array
  * @return        String with the specified value on success, 
  *                NULL otherwise
  */
 VXIVALUE_API VXIString *VXIStringCreate(const VXIchar *str)
 {
   if ( str == NULL )
     return NULL;
 
   return new VXIString (str);
 }
 
 
 /**
  * Create a String from a known-length character array
  *
  * @param   str   Character array (null characters may be embedded in 
  *                the array)
  * @param   len   Number of characters which will be copied.
  * @return        String with the specified value on success, 
  *                NULL otherwise
  */
 VXIVALUE_API VXIString *VXIStringCreateN(const VXIchar *str, VXIunsigned len)
 {
   if ( str == NULL )
     return NULL;
 
   return new VXIString (str, len);
 }
 
 
 /**
  * String destructor
  *
  * @param   s   String to destroy
  */
 VXIVALUE_API void VXIStringDestroy(VXIString **s)
 {
   if (( s ) && ( *s ) && ( (*s)->GetType( ) == VALUE_STRING )) {
     delete *s;
     *s = NULL;
   }
 }
 
 
 /**
  * String clone
  *
  * Note: functionally redundant with VXIValueClone( ), but provided to
  * reduce the need for C casts for this common operation
  *
  * @param    s   String to clone
  * @return       Clone of the string on success, NULL otherwise
  */
 VXIVALUE_API VXIString *VXIStringClone(const VXIString *s)
 {
   if (( s == NULL ) || ( s->GetType( ) != VALUE_STRING ))
     return NULL;
 
   return new VXIString (*s);
 }
 
 
 /**
  * Set the value of a String from a null-terminated character array
  *
  * Note: this functionality is provided to allow defining interfaces
  * where the caller passes in a VXIString from VXIStringCreate( )
  * (typically with an empty string as its value) with the interface
  * changing that value to return a string as output. This avoids
  * having to define interfaces where the client has to provide a
  * fixed length buffer (and thus worry about "buffer too small" errors
  * and complicated handling).
  *
  * @param   s     String to change the value of
  * @param   str   NULL-terminated character array
  * @return        VXIvalue_RESULT_SUCCESS on success 
  */
 VXIVALUE_API VXIvalueResult VXIStringSetValue(VXIString      *s, 
 					      const VXIchar  *str)
 {
   if (( s == NULL ) || ( s->GetType( ) != VALUE_STRING ) || 
       ( str == NULL ))
     return VXIvalue_RESULT_INVALID_ARGUMENT;
 
   s->SetValue (str);
   return VXIvalue_RESULT_SUCCESS;
 }
 
 
 /**
  * Get the value of a String
  *
  * @param   s     String to access
  * @param   buf   Character buffer to copy the value into as a
  *                NULL-terminated character array.  The buffer size must be
  *                at least VXIStringLength() + 1.
  * @param   len   Size of the buffer, in characters
  * @return        Pointer to buf on success, NULL on failure (most likely
  *                buffer too small) 
  */
 VXIVALUE_API VXIchar *VXIStringValue(const VXIString  *s, 
 				     VXIchar          *buf, 
 				     VXIunsigned       len)
 {
   if (( s == NULL ) || ( s->GetType( ) != VALUE_STRING ) || 
       ( buf == NULL ))
     return NULL;
 
   // Make sure the buffer is large enough
   if ( len < s->GetLength( ) + 1 ) return NULL;
 
   const STL_STRING & str = s->GetValue();
   unsigned int length = s->GetLength();
   for (unsigned int i = 0; i < length; ++i)
     *(buf + i) = str[i];
 
   *(buf + length) = L'\0';
 
   return buf;
 }
 
 
 /**
  * Get direct access to the NULL-terminated character value
  *
  * Note: the returned buffer must never be modified, and is only
  * provided for transient use (i.e. immediately logging it, comparing
  * it, etc. rather than storing or returning the pointer for longer
  * term access).
  *
  * @param   s   String to retrieve the data from
  * @return      Pointer to the NULL-terminated character array retrieved
  */
 VXIVALUE_API const VXIchar* VXIStringCStr(const VXIString *s)
 {
   if (( s == NULL ) || ( s->GetType( ) != VALUE_STRING ))
     return NULL;
   return s->GetValue( ).c_str( );
 }
 
 
 /**
  * Get the number of characters in a String's value
  *
  * Note: Add one byte for the NULL terminator when using this to determine
  * the length of the array required for a VXIStringValue( ) call.
  *
  * @param   s   String to access
  * @return      Length of the string, in characters
  */
 VXIVALUE_API VXIunsigned VXIStringLength(const VXIString *s)
 {
   if (( s == NULL ) || ( s->GetType( ) != VALUE_STRING ))
     return 0;
   return s->GetLength( );
 }
 
 
 /**
  * Compares two Strings
  *
  * @param   s1   First String to compare
  * @param   s2   Second String to compare
  * @return       Returns a value that is less than, equal to, or greater
  *               than zero depending on whether s1 is lexicographically
  *               less than, equal to, or greater than s2
  */
 VXIVALUE_API VXIint VXIStringCompare(const VXIString *s1, 
 				     const VXIString *s2)
 {
   if (( s1 == NULL ) || ( s1->GetType( ) != VALUE_STRING ))
     return -1;
   if (( s2 == NULL ) || ( s2->GetType( ) != VALUE_STRING ))
     return 1;
   return s1->GetValue( ).compare (s2->GetValue( ));
 }
 
 
 /**
  * Compares a String to a NULL-terminated character array
  *
  * @param   str   String to compare
  * @param   buf   NULL-terminated character array to compare
  * @return        Returns a value that is less than, equal to, or greater
  *                than zero depending on whether str is lexicographically
  *                less than, equal to, or greater than buf
  */
 VXIVALUE_API VXIint VXIStringCompareC(const VXIString *str, 
 				      const VXIchar   *buf)
 {
   if (( str == NULL ) || ( str->GetType( ) != VALUE_STRING ))
     return -1;
   if ( buf == NULL )
     return 1;
   return str->GetValue( ).compare (buf);
 }
 
 
 /**
  * Create an empty Map
  *
  * @return   New map on success, NULL otherwise
  */
 VXIVALUE_API VXIMap *VXIMapCreate(void)
 {
   return new VXIMap;
 }
 
 
 /**
  * Map destructor
  *
  * Note: this recursively destroys all the values contained within the
  * Map, including all the values of Maps and Vectors stored
  * within this map. However, for Ptr values the user is
  * responsible for freeing the held memory if appropriate.
  *
  * @param m   Map to destroy 
  */
 VXIVALUE_API void VXIMapDestroy(VXIMap **m)