sprint/io/utils.h

Go to the documentation of this file.

/******************************************************************************
*   sprint::stream::utils
*
*   Copyright (C) 2005-2011  Paolo Medici <www.pmx.it>
*
*  This library is free software; you can redistribute it and/or
*  modify it under the terms of the GNU Lesser General Public
*  License as published by the Free Software Foundation; either
*  version 2.1 of the License, or (at your option) any later version.
*
*  This library 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
*  Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public
*  License along with this library; if not, write to the Free Software
*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*
*******************************************************************************/

#ifndef _SPRINT_STREAM_UTILS_H
#define _SPRINT_STREAM_UTILS_H

#include <sprint/log.h>

namespace sprint {

template<class _Stream, class _Storage>
int read_until(_Stream & b, _Storage & s, char c, int max_read_size = 1048576)
{
     int r;
     int n  = 0;
     do {
         r = b.get();
         if(r == -1) 
              return n;
              
         s.push_back(r);
         n++;
     } while ((r != c) && (n<max_read_size));
     return n;
}

template<class _S>
int readsome(_S & s, char * buffer, int len)
{
int ret;
int size = 0;

if(buffer)
{
while(len>0)
        {
        ret = s.read(buffer + size, len);       /* len0 bug free */
        if(ret==0)
                {
                // ?
                logPutsf(LOG_LEVEL_WARNING,"read return 0 at %u", size);
                return size;    
                }
        else
        if(ret==-1) 
                {
                logPuts(LOG_LEVEL_ERROR,"read return error");
                return -1;
                }
        size+=ret;
        len-=ret;
        }
}
else
        logPuts(LOG_LEVEL_ERROR,"internal error: readsome called with NULL buffer");
return size;   
}
          
} // sprint

#endif