[apple/shell_cmds.git] / window / ttoutput.c

/*	$NetBSD: ttoutput.c,v 1.4 1997/11/21 08:36:34 lukem Exp $	*/

/*
 * 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)ttoutput.c	8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: ttoutput.c,v 1.4 1997/11/21 08:36:34 lukem Exp $");
#endif
#endif /* not lint */

#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "ww.h"
#include "tt.h"

/*
 * Buffered output package.
 * We need this because stdio fails on non-blocking writes.
 */

void
ttflush()
{
	char *p;
	int 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;
}

void
ttputs(s)
	char *s;
{
	while (*s)
		ttputc(*s++);
}

void
ttwrite(s, n)
	char *s;
	int 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) {
			int m;

			while ((m = tt_obe - tt_obp) == 0)
				ttflush();
			if ((m = tt_obe - tt_obp) > n)
				m = n;
			memmove(tt_obp, s, m);
			tt_obp += m;
			s += m;
			n -= m;
		}
	}
}
Commit	Line	Data
44bd5ea7 A	1	/* $NetBSD: ttoutput.c,v 1.4 1997/11/21 08:36:34 lukem Exp $ */
	2
	3	/*
	4	* Copyright (c) 1983, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Edward Wang at The University of California, Berkeley.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	36	* SUCH DAMAGE.
	37	*/
	38
	39	#include <sys/cdefs.h>
	40	#ifndef lint
	41	#if 0
	42	static char sccsid[] = "@(#)ttoutput.c 8.1 (Berkeley) 6/6/93";
	43	#else
	44	__RCSID("$NetBSD: ttoutput.c,v 1.4 1997/11/21 08:36:34 lukem Exp $");
	45	#endif
	46	#endif /* not lint */
	47
	48	#include <errno.h>
	49	#include <string.h>
	50	#include <unistd.h>
	51	#include "ww.h"
	52	#include "tt.h"
	53
	54	/*
	55	* Buffered output package.
	56	* We need this because stdio fails on non-blocking writes.
	57	*/
	58
	59	void
	60	ttflush()
	61	{
	62	char *p;
	63	int n = tt_obp - tt_ob;
	64
65	if (n == 0)
66	return;
67	if (tt.tt_checksum)
68	(*tt.tt_checksum)(tt_ob, n);
69	if (tt.tt_flush) {
70	(*tt.tt_flush)();
71	return;
72	}
73	wwnflush++;
74	for (p = tt_ob; p < tt_obp;) {
75	wwnwr++;
76	n = write(1, p, tt_obp - p);
77	if (n < 0) {
78	wwnwre++;
79	if (errno != EWOULDBLOCK) {
80	/* can't deal with this */
81	p = tt_obp;
82	}
83	} else if (n == 0) {
84	/* what to do? */
85	wwnwrz++;
86	} else {
87	wwnwrc += n;
88	p += n;
89	}
90	}
91	tt_obp = tt_ob;
92	}
93
94	void
95	ttputs(s)
96	char *s;
97	{
98	while (*s)
99	ttputc(*s++);
100	}
101
102	void
103	ttwrite(s, n)
104	char *s;
105	int n;
106	{
107	switch (n) {
108	case 0:
109	break;
110	case 1:
111	ttputc(*s);
112	break;
113	case 2:
114	if (tt_obe - tt_obp < 2)
115	ttflush();
116	tt_obp++ = s++;
117	tt_obp++ = s;
118	break;
119	case 3:
120	if (tt_obe - tt_obp < 3)
121	ttflush();
122	tt_obp++ = s++;
123	tt_obp++ = s++;
124	tt_obp++ = s;
125	break;
126	case 4:
127	if (tt_obe - tt_obp < 4)
128	ttflush();
129	tt_obp++ = s++;
130	tt_obp++ = s++;
131	tt_obp++ = s++;
132	tt_obp++ = s;
133	break;
134	case 5:
135	if (tt_obe - tt_obp < 5)
136	ttflush();
137	tt_obp++ = s++;
138	tt_obp++ = s++;
139	tt_obp++ = s++;
140	tt_obp++ = s++;
141	tt_obp++ = s;
142	break;
143	default:
144	while (n > 0) {
145	int m;
146
147	while ((m = tt_obe - tt_obp) == 0)
148	ttflush();
149	if ((m = tt_obe - tt_obp) > n)
150	m = n;
151	memmove(tt_obp, s, m);
152	tt_obp += m;
153	s += m;
154	n -= m;
155	}
156	}
157	}