/* mvme-read.c -- read bytes from a input device.
|
/* mvme-read.c -- read bytes from a input device.
|
*
|
*
|
* Copyright (c) 1996 Cygnus Support
|
* Copyright (c) 1996 Cygnus Support
|
*
|
*
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
* and license this software and its documentation for any purpose, provided
|
* and license this software and its documentation for any purpose, provided
|
* that existing copyright notices are retained in all copies and that this
|
* that existing copyright notices are retained in all copies and that this
|
* notice is included verbatim in any distributions. No written agreement,
|
* notice is included verbatim in any distributions. No written agreement,
|
* license, or royalty fee is required for any of the authorized uses.
|
* license, or royalty fee is required for any of the authorized uses.
|
* Modifications to this software may be copyrighted by their authors
|
* Modifications to this software may be copyrighted by their authors
|
* and need not follow the licensing terms described here, provided that
|
* and need not follow the licensing terms described here, provided that
|
* the new terms are clearly indicated on the first page of each file where
|
* the new terms are clearly indicated on the first page of each file where
|
* they apply.
|
* they apply.
|
*/
|
*/
|
|
|
extern int inbyte ();
|
extern int inbyte ();
|
extern char * __inln ();
|
extern char * __inln ();
|
|
|
/*
|
/*
|
* read -- read bytes from the serial port. Ignore fd, since
|
* read -- read bytes from the serial port. Ignore fd, since
|
* we only have stdin.
|
* we only have stdin.
|
*/
|
*/
|
int
|
int
|
read (fd, buf, nbytes)
|
read (fd, buf, nbytes)
|
int fd;
|
int fd;
|
char *buf;
|
char *buf;
|
int nbytes;
|
int nbytes;
|
{
|
{
|
if (nbytes >= 256)
|
if (nbytes >= 256)
|
{
|
{
|
char *read_end = __inln (buf);
|
char *read_end = __inln (buf);
|
*read_end = '\n';
|
*read_end = '\n';
|
return read_end - buf + 1;
|
return read_end - buf + 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
int i, c;
|
int i, c;
|
for (i = 0; i < nbytes; i++) {
|
for (i = 0; i < nbytes; i++) {
|
*buf++ = c = inbyte ();
|
*buf++ = c = inbyte ();
|
if (c == '\n' || c == '\r') {
|
if (c == '\n' || c == '\r') {
|
buf[-1] = '\n'; /* convert \r to \n */
|
buf[-1] = '\n'; /* convert \r to \n */
|
buf[0] = '\0';
|
buf[0] = '\0';
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
return i;
|
return i;
|
}
|
}
|
}
|
}
|
|
|
