1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* -*-c-*- -------------- xmix_device.c :
* Implementation of the functions declared in xmix_device.h
* ------------------------------------------------------------------
* Last change: Time-stamp: "2001-05-10 01:10:25 jao"
* ------------------------------------------------------------------
* Copyright (C) 2001 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include "xmix_device.h"
gchar *DEV_DIR_ = NULL;
const char *DEV_EXT_ = ".dev";
const char *DEF_NAMES_[] = {
"tape0", "tape1", "tape2", "tape3", "tape4", "tape5", "tape6", "tape7",
"disk0", "disk1", "disk2", "disk3", "disk4", "disk5", "disk6", "disk7",
"cardrd", "cardwr", "printer", "console", "paper"
};
const size_t SIZES_[] = {
100, 100, 100, 100, 100, 100, 100, 100,
100, 100, 100, 100, 100, 100, 100, 100,
16, 16, 24, 14, 14
};
const mix_device_mode_t MODES_[] = {
mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,
mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,
mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN, mix_dev_BIN,
mix_dev_BIN, mix_dev_CHAR, mix_dev_CHAR, mix_dev_CHAR, mix_dev_CHAR,
mix_dev_CHAR
};
const mix_fmode_t FMODES_[] = {
mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT,
mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT,
mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT,
mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT, mix_io_RDWRT,
mix_io_READ, mix_io_WRITE, mix_io_WRITE, mix_io_WRITE, mix_io_WRITE
};
/* constructors */
void
construct_device_ (mix_device_t *result, mix_device_type_t type)
{
gchar *name;
name = DEV_DIR_ ? g_strdup_printf ("%s/%s", DEV_DIR_, DEF_NAMES_[type])
: g_strdup (DEF_NAMES_[type]);
construct_device_with_name_ (result, type, name);
g_free (name);
}
void
construct_device_with_name_ (mix_device_t *result,
mix_device_type_t type, const gchar *name)
{
result->type = type;
if (type != mix_dev_CONSOLE)
{
result->file = MIX_IOCHANNEL(mix_file_new_with_def_ext (name,
FMODES_[type],
DEV_EXT_));
}
else
{
result->file = mix_io_new (stdout);
}
result->vtable = DEF_DEV_VTABLE_;
}
void
construct_device_with_file_ (mix_device_t *result,
mix_device_type_t type, FILE *file)
{
result->type = type;
result->file = mix_io_new (file);
result->vtable = DEF_DEV_VTABLE_;
}
/*
Write a block to the device.
*/
static gboolean
write_ (mix_device_t *dev, const mix_word_t *block)
{
gboolean result;
if (FMODES_[dev->type] == mix_io_READ) return FALSE;
if (MODES_[dev->type] == mix_dev_CHAR)
result = mix_io_write_word_array_as_char (GET_CHANNEL_ (dev),
block, SIZES_[dev->type]);
else
result = mix_io_write_word_array (GET_CHANNEL_ (dev),
block, SIZES_[dev->type]);
if (result && mix_device_mode(dev) == mix_dev_CHAR)
putc ('\n', mix_io_to_FILE (GET_CHANNEL_ (dev)));
fflush (mix_io_to_FILE (GET_CHANNEL_ (dev)));
return result;
}
static gboolean
read_ (mix_device_t *dev, mix_word_t *block)
{
if (FMODES_[dev->type] == mix_io_WRITE) return FALSE;
if (MODES_[dev->type] == mix_dev_CHAR)
return mix_io_read_word_array_as_char (GET_CHANNEL_ (dev),
block, SIZES_[dev->type]);
else
return mix_io_read_word_array (GET_CHANNEL_ (dev),
block, SIZES_[dev->type]);
}
static gboolean
ioc_ (mix_device_t *dev, mix_short_t arg)
{
int m;
FILE *file;
m = mix_short_magnitude(arg);
if (mix_short_is_negative(arg)) m = -m;
m *= sizeof (mix_word_t) * SIZES_[dev->type];
file = mix_io_to_FILE (GET_CHANNEL_(dev));
if (dev->type >= mix_dev_TAPE_0 && dev->type <= mix_dev_TAPE_7)
{
if (m == 0) rewind (file);
else fseek (file, m, SEEK_CUR);
}
if (dev->type >= mix_dev_DISK_0 && dev->type <= mix_dev_DISK_7)
{
g_return_val_if_fail (m == 0, FALSE);
// position disk
}
if (dev->type == mix_dev_PAPER_TAPE)
{
g_return_val_if_fail (m == 0, FALSE);
rewind (file);
}
return TRUE;
}
static gboolean
busy_ (const mix_device_t *dev)
{
return (!mix_io_is_ready (GET_CHANNEL_(dev)));
}
static void
destroy_ (mix_device_t *dev)
{
if (dev->type != mix_dev_CONSOLE && GET_FILE_(dev) != NULL)
mix_file_delete (GET_FILE_(dev));
}
static mix_device_vtable_t VTABLE_ = {
write_, read_, ioc_, busy_, destroy_
};
const mix_device_vtable_t * DEF_DEV_VTABLE_ = &VTABLE_;
|