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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* -*-c-*- -------------- mix_device.c :
* Implementation of the functions declared in mix_device.h
* ------------------------------------------------------------------
* Copyright (C) 2000 jose antonio ortega ruiz <jaortega@acm.org>
*
* 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 "mix_file.h"
#include "mix_device.h"
/*
Actual definition of a mix device, which can be cast to
a mix file.
*/
struct mix_device_t
{
mix_iochannel_t *file;
mix_device_type_t type;
};
static const char *DEV_EXT_ = ".dev";
static 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"
};
static 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
};
static 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
};
static 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_RDWRT, mix_io_WRITE
};
#define GET_CHANNEL_(dev) (dev->file)
#define GET_FILE_(dev) ((mix_file_t *)(dev->file))
mix_device_t *
mix_device_new (mix_device_type_t type)
{
mix_device_t *result = g_new (mix_device_t, 1);
g_return_val_if_fail (result != NULL, result);
result->type = type;
if (type != mix_dev_CONSOLE) {
result->file = MIX_IOCHANNEL(mix_file_new_with_def_ext (DEF_NAMES_[type],
FMODES_[type],
DEV_EXT_));
} else
result->file = mix_io_new (stdout);
return result;
}
void
mix_device_delete (mix_device_t *dev)
{
if (dev != NULL)
{
if (dev->type != mix_dev_CONSOLE && GET_FILE_(dev) != NULL)
mix_file_delete (GET_FILE_(dev));
g_free (dev);
}
}
mix_device_t *
mix_device_new_with_name (mix_device_type_t type, const gchar *name)
{
mix_device_t *result = NULL;
g_return_val_if_fail (name != NULL, result);
result = g_new (mix_device_t, 1);
g_return_val_if_fail (result != NULL, result);
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);
}
return result;
}
const char *
mix_device_get_name (mix_device_t *dev)
{
g_return_val_if_fail (dev != NULL, NULL);
return mix_file_base_name(GET_FILE_(dev));
}
/*
Get the device block size
*/
size_t
mix_device_block_size (mix_device_t *dev)
{
g_return_val_if_fail (dev != NULL, 0);
return SIZES_[dev->type];
}
/*
Get the device io mode
*/
mix_device_mode_t
mix_device_mode (mix_device_t *dev)
{
g_return_val_if_fail (dev != NULL, 0);
return MODES_[dev->type];
}
/*
Write a block to the device.
*/
gboolean
mix_device_write (mix_device_t *dev, const mix_word_t *block)
{
gboolean result;
g_return_val_if_fail (dev != NULL, FALSE);
g_return_val_if_fail (block != NULL, FALSE);
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;
}
gboolean
mix_device_read (mix_device_t *dev, mix_word_t *block)
{
g_return_val_if_fail (dev != NULL, FALSE);
g_return_val_if_fail (block != NULL, FALSE);
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]);
}
gboolean
mix_device_ioc (mix_device_t *dev, mix_short_t arg)
{
int m;
FILE *file;
g_return_val_if_fail (dev != NULL, FALSE);
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;
}
gboolean
mix_device_busy (mix_device_t *dev)
{
return (dev != NULL && !mix_io_is_ready(GET_CHANNEL_(dev)));
}
|
