f143cf9b513f10b01575413f990bb3e8b8e33e35
[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                         in = sr_input_scan_file(opt_input_file);
83                         /* That worked, reopen the file for reading. */
84                         fd = open(opt_input_file, O_RDONLY);
85                 } else {
86                         /*
87                          * Taking input from a pipe: let the input modules try
88                          * to identify the stream content.
89                          */
90                         if (!strcmp(opt_input_file, "-")) {
91                                 /* stdin */
92                                 fd = 0;
93                         } else {
94                                 if ((fd = open(opt_input_file, O_RDONLY)) == -1)
95                                         g_critical("Failed to load %s: %s.", opt_input_file,
96                                                         strerror(errno));
97                         }
98                         if ((len = read(fd, buf->str, BUFSIZE)) < 1)
99                                 g_critical("Failed to read %s: %s.", opt_input_file,
100                                                 strerror(errno));
101                         buf->len = len;
102                         in = sr_input_scan_buffer(buf);
103                 }
104                 if (!in)
105                         g_critical("Error: no input module found for this file.");
106         }
107         sdi = sr_input_dev_inst_get(in);
108
109         if (select_channels(sdi) != SR_OK)
110                 return;
111
112         sr_session_new(&session);
113         sr_session_datafeed_callback_add(session, &datafeed_in, NULL);
114         if (sr_session_dev_add(session, sdi) != SR_OK) {
115                 g_critical("Failed to use device.");
116                 sr_session_destroy(session);
117                 return;
118         }
119
120         while(TRUE) {
121                 g_string_truncate(buf, 0);
122                 len = read(fd, buf->str, BUFSIZE);
123                 if (len < 0)
124                         g_critical("Read failed: %s", strerror(errno));
125                 buf->len = len;
126                 if (sr_input_send(in, buf) != SR_OK)
127                         break;
128                 if (len < BUFSIZE)
129                         break;
130         }
131         sr_input_free(in);
132         g_string_free(buf, TRUE);
133
134         sr_session_destroy(session);
135
136 }
137
138 void load_input_file(void)
139 {
140         struct sr_session *session;
141         struct sr_dev_inst *sdi;
142         GSList *devices;
143         int ret;
144
145         if (strcmp(opt_input_file, "-") || sr_session_load(opt_input_file, &session) == SR_OK) {
146                 /* sigrok session file */
147                 ret = sr_session_dev_list(session, &devices);
148                 if (ret != SR_OK || !devices->data) {
149                         g_critical("Failed to access session device.");
150                         sr_session_destroy(session);
151                         return;
152                 }
153                 sdi = devices->data;
154                 if (select_channels(sdi) != SR_OK) {
155                         sr_session_destroy(session);
156                         return;
157                 }
158                 sr_session_datafeed_callback_add(session, datafeed_in, NULL);
159                 sr_session_start(session);
160                 sr_session_run(session);
161                 sr_session_stop(session);
162         }
163         else {
164                 /* fall back on input modules */
165                 load_input_file_module();
166         }
167 }