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/******************************************************************************
* to emulate the serial input and output of an 8051 controller *
* fileio.cc - file input and output *
******************************************************************************/
#include <sys/types.h>
#include <iostream>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "fileio.hh"
FileIO::FileIO()
{
// make the input fifo
if(mkfifo(DEF_INFILE, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) == -1) {
if(errno != EEXIST) {
std::cerr << "mkfifo(): Error number " << errno << " occourred: " << strerror(errno) << "\n";
exit(-1);
}
}
// the input fifo - non blocking
if ((fdin = open(DEF_INFILE, O_RDONLY|O_NONBLOCK)) == -1) {
std::cerr << "open(): Error number " << errno << " occourred: " << strerror(errno) << "\n";
exit(-1);
}
// make the output fifo
if(mkfifo(DEF_OUTFILE, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) == -1) {
if(errno != EEXIST) {
std::cerr << "mkfifo(): Error number " << errno << " occourred: " << strerror(errno) << "\n";
exit(-1);
}
}
// the output fifo
if ((fdout = open(DEF_OUTFILE, O_RDWR|O_NONBLOCK)) == -1) {
std::cerr << "open(): Error number " << errno << " occourred: " << strerror(errno) << "\n";
exit(-1);
}
}
FileIO::FileIO(const char *infile, const char *outfile)
{
// make the input fifo
if(mkfifo(infile, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) == -1) {
if(errno != EEXIST) {
std::cerr << "mkfifo(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
}
// the input fifo - non blocking
if ((fdin = open(infile, O_RDONLY|O_NONBLOCK)) == -1) {
std::cerr << "open(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
// make the output fifo
if(mkfifo(outfile, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) == -1) {
if(errno != EEXIST) {
std::cerr << "mkfifo(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
}
// the output fifo
if ((fdout = open(outfile, O_RDWR|O_NONBLOCK)) == -1) {
std::cerr << "open(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
}
FileIO::~FileIO()
{
close(fdin);
close(fdout);
}
int FileIO::SendByte(char b)
{
int ret;
if((ret = write(fdout, &b, 1)) != 1)
{
std::cerr << "write(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
return(ret);
}
int FileIO::RecvByte(char *b)
{
int ret;
ret = read(fdin, b, 1);
if((ret == -1) && (errno != EAGAIN))
{
std::cerr << "read(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
return(ret);
}
// send a string
int FileIO::SendStr(char *str)
{
int ret;
if((ret = write(fdout, str, strlen(str))) != (int)strlen(str))
{
std::cerr << "write(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
return(ret);
}
int FileIO::RecvStr(char *str)
{
int ret;
ret = read(fdin, str, MAX_SIZ-1);
str[MAX_SIZ] = 0;
if((ret == -1) && (errno != EAGAIN))
{
std::cerr << "read(): Error number " << errno << " occourred: " << strerror(errno);
exit(-1);
}
return(ret);
}
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