c/src/utils/XSECAutoPtr.hpp

/*
 * Copyright 2010 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * XSEC
 *
 * XSECAutoPtr := internal classes for RAII handling of transcoded data
 *
 * Author(s): Scott Cantor
 *
 * $Id:$
 *
 */


#ifndef XSECAUTOPTR_INCLUDE
#define XSECAUTOPTR_INCLUDE

#include <xsec/framework/XSECDefs.hpp>
#include <xercesc/util/XMLString.hpp>

XSEC_USING_XERCES(XMLString);

/**
 * \addtogroup internal
 * @{
 */

 /**
  * A minimal auto_ptr-like class that can copy or transcode a buffer into
  * the local code page and free the result automatically.
  *
  * Needed because a standard auto_ptr would use delete on the resulting
  * pointer.
  */
class XSECAutoPtrChar
{
    XSECAutoPtrChar(const XSECAutoPtrChar&);
    XSECAutoPtrChar& operator=(const XSECAutoPtrChar&);
public:
    XSECAutoPtrChar() : m_buf(NULL) {
    }

    XSECAutoPtrChar(const XMLCh* src) : m_buf(xercesc::XMLString::transcode(src)) {
    }

    XSECAutoPtrChar(const char* src) : m_buf(xercesc::XMLString::replicate(src)) {
    }

    ~XSECAutoPtrChar() {
        XSEC_RELEASE_XMLCH(m_buf);
    }

    const char* get() const {
        return m_buf;
    }

    char* release() {
        char* temp=m_buf; m_buf=NULL; return temp;
    }

private:
    char* m_buf;
};

/**
 * A minimal auto_ptr-like class that can copy or transcode a buffer into
 * 16-bit Unicode and free the result automatically.
 *
 * Needed because a standard auto_ptr would use delete on the resulting
 * pointer.
 */
class XSECAutoPtrXMLCh
{
    XSECAutoPtrXMLCh(const XSECAutoPtrXMLCh&);
    XSECAutoPtrXMLCh& operator=(const XSECAutoPtrXMLCh&);
public:
    XSECAutoPtrXMLCh() : m_buf(NULL) {
    }

    XSECAutoPtrXMLCh(const char* src) : m_buf(xercesc::XMLString::transcode(src)) {
    }

    XSECAutoPtrXMLCh(const XMLCh* src) : m_buf(xercesc::XMLString::replicate(src)) {
    }

    ~XSECAutoPtrXMLCh() {
        XSEC_RELEASE_XMLCH(m_buf);
    }

    const XMLCh* get() const {
        return m_buf;
    }

    XMLCh* release() {
        XMLCh* temp=m_buf; m_buf=NULL; return temp;
    }

private:
    XMLCh* m_buf;
};

/** @} */

#endif /* XSECAUTOPTR_INCLUDE */