Fix session file loading.
[sigrok-cli.git] / input.c
1 /*
2  * This file is part of the sigrok-cli project.
3  *
4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
5  *
6  * This program is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include "sigrok-cli.h"
21 #include "config.h"
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <unistd.h>
26 #include <errno.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <glib.h>
30
31 #define BUFSIZE 16384
32
33 static void load_input_file_module(void)
34 {
35         struct sr_session *session;
36         const struct sr_input *in;
37         const struct sr_input_module *imod;
38         const struct sr_option **options;
39         struct sr_dev_inst *sdi;
40         GHashTable *mod_args, *mod_opts;
41         GString *buf;
42         int fd;
43         ssize_t len;
44         char *mod_id;
45
46         if (!sr_input_list())
47                 g_critical("No supported input formats available.");
48
49         mod_id = NULL;
50         mod_args = NULL;
51         if (opt_input_format) {
52                 mod_args = parse_generic_arg(opt_input_format, TRUE);
53                 mod_id = g_hash_table_lookup(mod_args, "sigrok_key");
54         }
55
56         buf = g_string_sized_new(BUFSIZE);
57         if (mod_id) {
58                 /* User specified an input module to use. */
59                 if (!(imod = sr_input_find(mod_id)))
60                         g_critical("Error: unknown input module '%s'.", mod_id);
61                 g_hash_table_remove(mod_args, "sigrok_key");
62                 if ((options = sr_input_options_get(imod))) {
63                         mod_opts = generic_arg_to_opt(options, mod_args);
64                         sr_output_options_free(options);
65                 } else
66                         mod_opts = NULL;
67                 if (!(in = sr_input_new(imod, mod_opts)))
68                         g_critical("Error: failed to initialize input module.");
69                 if (mod_opts)
70                         g_hash_table_destroy(mod_opts);
71                 if (mod_args)
72                         g_hash_table_destroy(mod_args);
73                 if ((fd = open(opt_input_file, O_RDONLY)) == -1)
74                         g_critical("Failed to load %s: %s.", opt_input_file,
75                                         strerror(errno));
76         } else {
77                 if (strcmp(opt_input_file, "-")) {
78                         /*
79                          * An actual filename: let the input modules try to
80                          * identify the file.
81                          */
82                         if (sr_input_scan_file(opt_input_file, &in) == SR_OK) {
83                                 /* That worked, reopen the file for reading. */
84                                 fd = open(opt_input_file, O_RDONLY);
85                         }
86                 } else {
87                         /*
88                          * Taking input from a pipe: let the input modules try
89                          * to identify the stream content.
90                          */
91                         if (!strcmp(opt_input_file, "-")) {
92                                 /* stdin */
93                                 fd = 0;
94                         } else {
95                                 if ((fd = open(opt_input_file, O_RDONLY)) == -1)
96                                         g_critical("Failed to load %s: %s.", opt_input_file,
97                                                         strerror(errno));
98                         }
99                         if ((len = read(fd, buf->str, BUFSIZE)) < 1)
100                                 g_critical("Failed to read %s: %s.", opt_input_file,
101                                                 strerror(errno));
102                         buf->len = len;
103                         sr_input_scan_buffer(buf, &in);
104                 }
105                 if (!in)
106                         g_critical("Error: no input module found for this file.");
107         }
108         sdi = sr_input_dev_inst_get(in);
109
110         if (select_channels(sdi) != SR_OK)
111                 return;
112
113         sr_session_new(&session);
114         sr_session_datafeed_callback_add(session, &datafeed_in, NULL);
115         if (sr_session_dev_add(session, sdi) != SR_OK) {
116                 g_critical("Failed to use device.");
117                 sr_session_destroy(session);
118                 return;
119         }
120
121         while(TRUE) {
122                 g_string_truncate(buf, 0);
123                 len = read(fd, buf->str, BUFSIZE);
124                 if (len < 0)
125                         g_critical("Read failed: %s", strerror(errno));
126                 buf->len = len;
127                 if (sr_input_send(in, buf) != SR_OK)
128                         break;
129                 if (len < BUFSIZE)
130                         break;
131         }
132         sr_input_free(in);
133         g_string_free(buf, TRUE);
134
135         sr_session_destroy(session);
136
137 }
138
139 void load_input_file(void)
140 {
141         struct sr_session *session;
142         struct sr_dev_inst *sdi;
143         GSList *devices;
144         int ret;
145
146         if (strcmp(opt_input_file, "-") && sr_session_load(opt_input_file, &session) == SR_OK) {
147                 /* sigrok session file */
148                 ret = sr_session_dev_list(session, &devices);
149                 if (ret != SR_OK || !devices->data) {
150                         g_critical("Failed to access session device.");
151                         sr_session_destroy(session);
152                         return;
153                 }
154                 sdi = devices->data;
155                 if (select_channels(sdi) != SR_OK) {
156                         sr_session_destroy(session);
157                         return;
158                 }
159                 sr_session_datafeed_callback_add(session, datafeed_in, NULL);
160                 sr_session_start(session);
161                 sr_session_run(session);
162                 sr_session_stop(session);
163         } else {
164                 /* fall back on input modules */
165                 load_input_file_module();
166         }
167 }