147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)ttoutput.c 8.1 (Berkeley) 6/6/93";
|
|
static char rcsid[] = "@(#)$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include "ww.h"
|
|
#include "tt.h"
|
|
#include <errno.h>
|
|
|
|
/*
|
|
* Buffered output package.
|
|
* We need this because stdio fails on non-blocking writes.
|
|
*/
|
|
|
|
ttflush()
|
|
{
|
|
register char *p;
|
|
register n = tt_obp - tt_ob;
|
|
|
|
if (n == 0)
|
|
return;
|
|
if (tt.tt_checksum)
|
|
(*tt.tt_checksum)(tt_ob, n);
|
|
if (tt.tt_flush) {
|
|
(*tt.tt_flush)();
|
|
return;
|
|
}
|
|
wwnflush++;
|
|
for (p = tt_ob; p < tt_obp;) {
|
|
wwnwr++;
|
|
n = write(1, p, tt_obp - p);
|
|
if (n < 0) {
|
|
wwnwre++;
|
|
if (errno != EWOULDBLOCK) {
|
|
/* can't deal with this */
|
|
p = tt_obp;
|
|
}
|
|
} else if (n == 0) {
|
|
/* what to do? */
|
|
wwnwrz++;
|
|
} else {
|
|
wwnwrc += n;
|
|
p += n;
|
|
}
|
|
}
|
|
tt_obp = tt_ob;
|
|
}
|
|
|
|
ttputs(s)
|
|
register char *s;
|
|
{
|
|
while (*s)
|
|
ttputc(*s++);
|
|
}
|
|
|
|
ttwrite(s, n)
|
|
register char *s;
|
|
register n;
|
|
{
|
|
switch (n) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
ttputc(*s);
|
|
break;
|
|
case 2:
|
|
if (tt_obe - tt_obp < 2)
|
|
ttflush();
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s;
|
|
break;
|
|
case 3:
|
|
if (tt_obe - tt_obp < 3)
|
|
ttflush();
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s;
|
|
break;
|
|
case 4:
|
|
if (tt_obe - tt_obp < 4)
|
|
ttflush();
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s;
|
|
break;
|
|
case 5:
|
|
if (tt_obe - tt_obp < 5)
|
|
ttflush();
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s++;
|
|
*tt_obp++ = *s;
|
|
break;
|
|
default:
|
|
while (n > 0) {
|
|
register m;
|
|
|
|
while ((m = tt_obe - tt_obp) == 0)
|
|
ttflush();
|
|
if ((m = tt_obe - tt_obp) > n)
|
|
m = n;
|
|
bcopy(s, tt_obp, m);
|
|
tt_obp += m;
|
|
s += m;
|
|
n -= m;
|
|
}
|
|
}
|
|
}
|