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