/*************************************************************************** *            rio.c * *  Mon May 21 18:08:10 2007 *  Copyright  2007  kf701 *  Email <kf701.ye AT gmail.com> ****************************************************************************//* *  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 <errno.h>#include "kf701.h"/** * @brief robust read wrapper for unix *  * Note: but in Linux, read have the same function * * @return same as read syscall */int32_t rio_read(int fd , void * buf , uint32_t size){	int nleft = size;	int nread;	char * bufp = buf;		while( nleft > 0 )	{		if( (nread = read( fd , bufp , nleft )) < 0 )		{			if( errno == EINTR )				nread = 0;			else if( errno == EAGAIN )				break;			else				return -1;		}		else if ( nread == 0 )			break;				nleft -= nread;		bufp += nread;	}	return (size - nleft);}/** * @brief robust write wrapper for unix * * Note: in Linux, write have the same function * * @return same as write syscall */int32_t rio_write(int fd , void * buf , uint32_t size){	uint32_t nleft = size;	int32_t nwrite;	char * bufp = buf;	while( nleft > 0 )	{		if((nwrite = write( fd, bufp , nleft )) <= 0 )		{			if( errno == EINTR )				nwrite = 0;			else				return -1;		}		nleft -= nwrite;		bufp += nwrite;	}	return size;}