Err.cxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "Err.hxx"
#include <cstdio>
#include <cstring>
#include <new>

namespace CLAM {

/* invoking the default constructor */
        Err::Err() throw()
        {
                mMsg = 0;
        }

/* invoking the overloaded constructor */
        Err::Err(const char* msg) throw()
        {
                mMsg = new(std::nothrow) char[strlen(msg)+1];
                if (!mMsg) return;
                strncpy(mMsg,msg,strlen(msg)+1);
        }

        Err::Err(const Err& orig) throw()
        {
                mMsg = new(std::nothrow) char[strlen(orig.what())+1];
                if (!mMsg) return;
                strncpy(mMsg,orig.what(),strlen(orig.what())+1);
        }

        Err::~Err() throw()
        {
                if ( mMsg )
                        delete [] mMsg;
        };

/* specifying the header's member function */
        void Err::Print(void) const throw()
        {       
                fprintf(stderr,"CLAM Error: ");
                if (mMsg)
                        fprintf(stderr,mMsg);
                else
                        fprintf(stderr,"Unknown Error");
                fprintf(stderr,"\n");
        }

        void Err::Embed(const std::exception &e) throw()
        {
                Embed(e.what());
        }

        void Err::Embed(const char* str) throw()
        {
                static const char* separation = "\n Nested error: ";
                size_t msgLen = strlen(mMsg);
                size_t sepLen = strlen(separation); 
                size_t strLen = strlen(str);
                size_t len;
                char* msg;
                len = msgLen + sepLen + strLen + 1;
                msg = new(std::nothrow) char[len];
                if (!msg) return;
                strcpy(msg,mMsg);
                strcpy(msg+msgLen,separation);
                strcpy(msg+msgLen+sepLen,str);
                delete [] mMsg;
                mMsg = msg;
        }

}