lib_print.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34
35#include <curses.priv.h>
36
37#include <term.h>
38
39MODULE_ID("$Id: lib_print.c,v 1.11 1999/02/27 19:59:05 tom Exp $")
40
41int mcprint(char *data, int len)
42/* ship binary character data to the printer via mc4/mc5/mc5p */
43{
44    char	*mybuf, *switchon;
45    size_t	onsize,	offsize, res;
46
47    errno = 0;
48    if (!cur_term || (!prtr_non && (!prtr_on || !prtr_off)))
49    {
50	errno = ENODEV;
51	return(ERR);
52    }
53
54    if (prtr_non)
55    {
56	switchon = tparm(prtr_non, len);
57	onsize = strlen(switchon);
58	offsize = 0;
59    }
60    else
61    {
62	switchon = prtr_on;
63	onsize = strlen(prtr_on);
64	offsize = strlen(prtr_off);
65    }
66
67    if ((mybuf = typeMalloc(char, onsize + len + offsize + 1)) == (char *)0)
68    {
69	errno = ENOMEM;
70	return(ERR);
71    }
72
73    (void) strcpy(mybuf, switchon);
74    memcpy(mybuf + onsize, data, len);
75    if (offsize)
76      (void) strcpy(mybuf + onsize + len, prtr_off);
77
78    /*
79     * We're relying on the atomicity of UNIX writes here.  The
80     * danger is that output from a refresh() might get interspersed
81     * with the printer data after the write call returns but before the
82     * data has actually been shipped to the terminal.  If the write(2)
83     * operation is truly atomic we're protected from this.
84     */
85    res = write(cur_term->Filedes, mybuf, onsize + len + offsize);
86
87    /*
88     * By giving up our scheduler slot here we increase the odds that the
89     * kernel will ship the contiguous clist items from the last write
90     * immediately.
91     */
92    (void) sleep(0);
93
94    free(mybuf);
95    return(res);
96}
97