domstring.hpp

基于属性证书的访问控制源代码,由c++编写,包括openssl,xercesc等

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 * The Apache Software License, Version 1.1
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 * ====================================================================
 *
 * 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
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/*
 * $Id: DOMString.hpp,v 1.5 2003/05/22 02:26:50 knoaman Exp $
 */

#ifndef DOMString_HEADER_GUARD_
#define DOMString_HEADER_GUARD_

#include <xercesc/util/XMemory.hpp>

#ifdef XML_DEBUG
#include "DOMStringImpl.hpp"
XERCES_CPP_NAMESPACE_BEGIN
#else
XERCES_CPP_NAMESPACE_BEGIN
class DOMStringHandle;
#endif

class DOM_NullPtr;

/**
 * <code>DOMString</code> is the generic string class that stores all strings
 * used in the DOM C++ API.
 *
 * Though this class supports most of the common string operations to manipulate
 * strings, it is not meant to be a comphrehensive string class.
 */

class CDOM_EXPORT DOMString : public XMemory{
public:
    /** @name Constructors and assignment operator */
    //@{
    /**
      * Default constructor for DOMString.  The resulting DOMString
      * object refers to no string at all; it will compare == 0.
      *
      */
    DOMString();

    /**
      * Copy constructor.
      *
      * @param other The object to be copied.
      */
    DOMString(const DOMString &other);

    /**
      * Constructor to build a DOMString from an XML character array.
      * (XMLCh is a 16 bit UNICODE character).
      *
      * @param other The null-terminated character array to be
      *   that provides the initial value for the DOMString.
      */
    DOMString(const XMLCh *other);

    /**
      * Constructor to build a DOMString from a character array of given length.
      *
      * @param other The character array to be imported into the <code>DOMString</code>
      * @param length The length of the character array to be imported
      */
    DOMString(const XMLCh *other, unsigned int length);

    /**
      * Constructor to build a DOMString from an 8 bit character array.
      * The char * string will be transcoded to UNICODE using the default
      * code page on the system where the code is running.
      *
      * @param other The character array to be imported into the <code>DOMString</code>
      */
    DOMString(const char *other);

    /**
      * Construct a null DOMString.
      */
    DOMString(int nullPointerValue);

    /**
      * Assignment operator.  Make destination DOMString refer to the same
      *      underlying string in memory as the source string.
      *
      * @param other the source DOMString.
      */
    DOMString &        operator = (const DOMString &other);



    DOMString &        operator = (DOM_NullPtr *other);

    //@}
    /** @name Destructor. */
    //@{

	 /**
	  * Destructor for DOMString
	  *
	  */
    ~DOMString();

    //@}
    /** @name Operators for string manipulation. */
    //@{

    /**
      * Concatenate a DOMString to another.
      *
      * @param other The string to be concatenated.
      * @return The concatenated object
      */
    // DOMString   operator + (const DOMString &other);

    //@}
    /** @name Equality and Inequality operators. */
    //@{

    /**
      * Equality operator.
      *
      * @param other The object to be compared with.
      * @return True if the two DOMStrings refer to the same underlying string
      *  in memory.
      *  <p>
      *  WARNING:  operator == does NOT compare the contents of
      *  the two  strings.  To do this, use the <code>DOMString::equals()</code>
      *  This behavior is modelled after the String operations in Java, and
      *  is also similar to operator == on the other DOM_* classes.
      */
    bool        operator == (const DOMString &other) const;

    /**
      * Inequality operator.
      *
      * @param other The object to be compared with.
      * @return True if the two DOMStrings refer to different underlying strings in
      *    memory.
      * <p>
      *  WARNING:  operator == does NOT compare the contents of
      *  the two  strings.  To do this, use the <code>DOMString::equals()</code>
      *  This behavior is modelled after the String operations in Java, and
      *  is also similar to operator == on the other DOM_* classes.
      */
    bool        operator != (const DOMString &other) const;

    /**
      * Equality operator.  Test for a null DOMString, which is one that does
      *   not refer to any string at all; similar to a null object reference
      *   variable in Java.
      *
      * @param other must be 0 or null.
      * @return
      */
    bool        operator == (const DOM_NullPtr *other) const;

    /**
      * Inequality operator, for null test.
      *
      * @param other must be 0 or null.
      * @return True if the two strings are different, false otherwise
      */
    bool        operator != (const DOM_NullPtr *other) const;

    //@}
    /** @name Functions to change the string. */
    //@{


    /**
      * Preallocate storage in the string to hold a given number of characters.
      * A DOMString will grow its buffer on demand, as characters are added,
      * but it can be more efficient to allocate once in advance, if the size is known.
      *
      * @param size The number of 16 bit characters to reserve.
      */
    void reserve(unsigned int size);


    /**
      * Appends the content of another <code>DOMString</code> to this string.
      *
      * @param other The object to be appended
      */
    void        appendData(const DOMString &other);

    /**
      * Append a single Unicode character to this string.
      *
      * @param ch The single character to be appended
      */
    void        appendData(XMLCh ch);

     /**
      * Append a null-terminated XMLCh * (Unicode) string to this string.
      *
      * @param other The object to be appended
      */
    void        appendData(const XMLCh *other);