forked from sigrokproject/sigrok-cli
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathinput.c
178 lines (156 loc) · 4.65 KB
/
input.c
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
/*
* This file is part of the sigrok-cli project.
*
* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "sigrok-cli.h"
#include "config.h"
#include <sys/stat.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
/**
* Return the input file format which the CLI tool should use.
*
* If the user specified -I / --input-format, use that one. Otherwise, try to
* autodetect the format as good as possible. Failing that, return NULL.
*
* @param filename The filename of the input file. Must not be NULL.
* @param opt The -I / --input-file option the user specified (or NULL).
*
* @return A pointer to the 'struct sr_input_format' that should be used,
* or NULL if no input format was selected or auto-detected.
*/
static struct sr_input_format *determine_input_file_format(
const char *filename, const char *opt)
{
int i;
struct sr_input_format **inputs;
/* If there are no input formats, return NULL right away. */
inputs = sr_input_list();
if (!inputs) {
g_critical("No supported input formats available.");
return NULL;
}
/* If the user specified -I / --input-format, use that one. */
if (opt) {
for (i = 0; inputs[i]; i++) {
if (strcasecmp(inputs[i]->id, opt))
continue;
g_debug("Using user-specified input file format '%s'.",
inputs[i]->id);
return inputs[i];
}
/* The user specified an unknown input format, return NULL. */
g_critical("Error: specified input file format '%s' is "
"unknown.", opt);
return NULL;
}
/* Otherwise, try to find an input module that can handle this file. */
for (i = 0; inputs[i]; i++) {
if (inputs[i]->format_match(filename))
break;
}
/* Return NULL if no input module wanted to touch this. */
if (!inputs[i]) {
g_critical("Error: no matching input module found.");
return NULL;
}
g_debug("cli: Autodetected '%s' input format for file '%s'.",
inputs[i]->id, filename);
return inputs[i];
}
static void load_input_file_format(void)
{
GHashTable *fmtargs = NULL;
struct stat st;
struct sr_session *session;
struct sr_input *in;
struct sr_input_format *input_format;
char *fmtspec = NULL;
if (opt_input_format) {
fmtargs = parse_generic_arg(opt_input_format, TRUE);
fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
}
if (!(input_format = determine_input_file_format(opt_input_file,
fmtspec))) {
/* The exact cause was already logged. */
return;
}
if (fmtargs)
g_hash_table_remove(fmtargs, "sigrok_key");
if (stat(opt_input_file, &st) == -1) {
g_critical("Failed to load %s: %s", opt_input_file,
strerror(errno));
exit(1);
}
/* Initialize the input module. */
if (!(in = g_try_malloc(sizeof(struct sr_input)))) {
g_critical("Failed to allocate input module.");
exit(1);
}
in->format = input_format;
in->param = fmtargs;
if (in->format->init) {
if (in->format->init(in, opt_input_file) != SR_OK) {
g_critical("Input format init failed.");
exit(1);
}
}
if (select_channels(in->sdi) != SR_OK)
return;
sr_session_new(&session);
sr_session_datafeed_callback_add(session, &datafeed_in, NULL);
if (sr_session_dev_add(session, in->sdi) != SR_OK) {
g_critical("Failed to use device.");
sr_session_destroy(session);
return;
}
input_format->loadfile(in, opt_input_file);
sr_session_destroy(session);
if (fmtargs)
g_hash_table_destroy(fmtargs);
}
void load_input_file(void)
{
GSList *devices;
struct sr_session *session;
struct sr_dev_inst *sdi;
int ret;
if (sr_session_load(opt_input_file, &session) == SR_OK) {
/* sigrok session file */
ret = sr_session_dev_list(session, &devices);
if (ret != SR_OK || !devices->data) {
g_critical("Failed to access session device.");
sr_session_destroy(session);
return;
}
sdi = devices->data;
if (select_channels(sdi) != SR_OK) {
sr_session_destroy(session);
return;
}
sr_session_datafeed_callback_add(session, datafeed_in, NULL);
sr_session_start(session);
sr_session_run(session);
sr_session_stop(session);
}
else {
/* fall back on input modules */
load_input_file_format();
}
}