This is cio.c in view mode; [Download] [Up]
/* SCHEME->C */
/* Copyright 1989 Digital Equipment Corporation
* All Rights Reserved
*
* Permission to use, copy, and modify this software and its documentation is
* hereby granted only under the following terms and conditions. Both the
* above copyright notice and this permission notice must appear in all copies
* of the software, derivative works or modified versions, and any portions
* thereof, and both notices must appear in supporting documentation.
*
* Users of this software agree to the terms and conditions set forth herein,
* and hereby grant back to Digital a non-exclusive, unrestricted, royalty-free
* right and license under any changes, enhancements or extensions made to the
* core functions of the software, including but not limited to those affording
* compatibility with other hardware or software environments, but excluding
* applications which incorporate this software. Users further agree to use
* their best efforts to return to Digital any such changes, enhancements or
* extensions that they make and inform Digital of noteworthy uses of this
* software. Correspondence should be provided to Digital at:
*
* Director of Licensing
* Western Research Laboratory
* Digital Equipment Corporation
* 100 Hamilton Avenue
* Palo Alto, California 94301
*
* This software may be distributed (but not offered for sale or transferred
* for compensation) to third parties, provided such third parties agree to
* abide by the terms and conditions of this notice.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/* This module supplies functions to access C Library I/O macros. */
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include "objects.h"
/* This really does not need to be dependant on ISC386IX, just the lack of */
/* a rename function. This is just a dirty hack. */
#ifdef ISC386IX
#include <stropts.h>
#include <poll.h>
int rename(old, new) char *old, *new;
{
if (link(old, new) == 0 && unlink(old) == 0)
return 0;
return -1;
}
#endif
int sc_libc_eof = EOF;
/* feof(stream) */
int sc_feof( stream )
FILE *stream;
{
return( feof( stream ) );
}
/* ferror(stream) */
int sc_ferror( stream )
FILE *stream;
{
return( ferror( stream ) );
}
/* clearerr(stream) */
sc_clearerr( stream )
FILE *stream;
{
clearerr( stream );
}
/* fileno(stream) */
int sc_fileno( stream )
FILE *stream;
{
return( fileno( stream ) );
}
/* The following function is a boolean which returns 1 when there are
input characters ready, and 0 when none are available.
*/
/* The changes here are probably generic Sys5 changes, but what the heck */
int sc_inputchars( stream )
FILE *stream;
{
int readfds, nfound;
#ifndef ISC386IX
struct timeval timeout;
#else
struct pollfd pollfd;
#endif
if (((stream)->_cnt) <= 0) {
#ifndef ISC386IX
readfds = 1<<(fileno( stream ));
timeout.tv_sec = 0;
timeout.tv_usec = 0;
nfound = select( fileno( stream )+1, &readfds, 0, 0, &timeout );
#else
pollfd.fd = fileno( stream );
pollfd.events = POLLIN;
nfound = poll(&pollfd, 1, 0);
#endif
if (nfound == 0) return( 0 );
}
return( 1 );
}
/* The following boolean returns 1 if there are characters buffered for the
stream, 0 otherwise.
*/
int sc_bufferedchars( stream )
FILE *stream;
{
if (((stream)->_cnt) > 0)
return( 1 );
else
return( 0 );
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.