options.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 <config.h>
  21 #include <glib.h>
  22 #include "sigrok-cli.h"
  23
  24 gboolean opt_version = FALSE;
  25 gboolean opt_list_supported = FALSE;
  26 gboolean opt_list_supported_wiki = FALSE;
  27 gint opt_loglevel = SR_LOG_WARN; /* Show errors+warnings by default. */
  28 gboolean opt_scan_devs = FALSE;
  29 gboolean opt_dont_scan = FALSE;
  30 gboolean opt_wait_trigger = FALSE;
  31 gchar *opt_input_file = NULL;
  32 gchar *opt_output_file = NULL;
  33 gchar *opt_drv = NULL;
  34 gchar *opt_config = NULL;
  35 gchar *opt_channels = NULL;
  36 gchar *opt_channel_group = NULL;
  37 gchar *opt_triggers = NULL;
  38 gchar **opt_pds = NULL;
  39 #ifdef HAVE_SRD
  40 gchar *opt_pd_annotations = NULL;
  41 gchar *opt_pd_meta = NULL;
  42 gchar *opt_pd_binary = NULL;
  43 gboolean opt_pd_samplenum = FALSE;
  44 #endif
  45 gchar *opt_input_format = NULL;
  46 gchar *opt_output_format = NULL;
  47 gchar *opt_transform_module = NULL;
  48 gboolean opt_show = FALSE;
  49 gchar *opt_time = NULL;
  50 gchar *opt_samples = NULL;
  51 gchar *opt_frames = NULL;
  52 gboolean opt_continuous = FALSE;
  53 gchar *opt_get = NULL;
  54 gboolean opt_set = FALSE;
  55
  56 /*
  57  * Defines a callback function that generates an error if an
  58  * option occurs twice.
  59  */
  60 #define CHECK_ONCE(option) \
  61 static gboolean check_ ## option                                          \
  62         (const gchar *option_name, const gchar *value,                    \
  63         gpointer data, GError **error)                                    \
  64 {                                                                         \
  65         (void)data;                                                       \
  66                                                                           \
  67         static gboolean seen = FALSE;                                     \
  68         if (seen) {                                                       \
  69                 g_set_error(error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED, \
  70                             "superfluous option \"%s\"", option_name);    \
  71                 return FALSE;                                             \
  72         }                                                                 \
  73                                                                           \
  74         option = g_strdup(value);                                         \
  75         seen = TRUE;                                                      \
  76         return TRUE;                                                      \
  77 }
  78
  79 CHECK_ONCE(opt_drv)
  80 CHECK_ONCE(opt_config)
  81 CHECK_ONCE(opt_input_format)
  82 CHECK_ONCE(opt_output_format)
  83 CHECK_ONCE(opt_transform_module)
  84 CHECK_ONCE(opt_channels)
  85 CHECK_ONCE(opt_channel_group)
  86 CHECK_ONCE(opt_triggers)
  87 #ifdef HAVE_SRD
  88 CHECK_ONCE(opt_pd_annotations)
  89 CHECK_ONCE(opt_pd_meta)
  90 CHECK_ONCE(opt_pd_binary)
  91 #endif
  92 CHECK_ONCE(opt_time)
  93 CHECK_ONCE(opt_samples)
  94 CHECK_ONCE(opt_frames)
  95 CHECK_ONCE(opt_get)
  96
  97 #undef CHECK_STR_ONCE
  98
  99 static gchar **input_file_array = NULL;
 100 static gchar **output_file_array = NULL;
 101
 102 static const GOptionEntry optargs[] = {
 103         {"version", 'V', 0, G_OPTION_ARG_NONE, &opt_version,
 104                         "Show version", NULL},
 105         {"list-supported", 'L', 0, G_OPTION_ARG_NONE, &opt_list_supported,
 106                         "List supported devices/modules/decoders", NULL},
 107         {"list-supported-wiki", 0, 0, G_OPTION_ARG_NONE, &opt_list_supported_wiki,
 108                         "List supported decoders (MediaWiki)", NULL},
 109         {"loglevel", 'l', 0, G_OPTION_ARG_INT, &opt_loglevel,
 110                         "Set loglevel (5 is most verbose)", NULL},
 111         {"driver", 'd', 0, G_OPTION_ARG_CALLBACK, &check_opt_drv,
 112                         "The driver to use", NULL},
 113         {"config", 'c', 0, G_OPTION_ARG_CALLBACK, &check_opt_config,
 114                         "Specify device configuration options", NULL},
 115         {"input-file", 'i', 0, G_OPTION_ARG_FILENAME_ARRAY, &input_file_array,
 116                         "Load input from file", NULL},
 117         {"input-format", 'I', 0, G_OPTION_ARG_CALLBACK, &check_opt_input_format,
 118                         "Input format", NULL},
 119         {"output-file", 'o', 0, G_OPTION_ARG_FILENAME_ARRAY, &output_file_array,
 120                         "Save output to file", NULL},
 121         {"output-format", 'O', 0, G_OPTION_ARG_CALLBACK, &check_opt_output_format,
 122                         "Output format", NULL},
 123         {"transform-module", 'T', 0, G_OPTION_ARG_CALLBACK, &check_opt_transform_module,
 124                         "Transform module", NULL},
 125         {"channels", 'C', 0, G_OPTION_ARG_CALLBACK, &check_opt_channels,
 126                         "Channels to use", NULL},
 127         {"channel-group", 'g', 0, G_OPTION_ARG_CALLBACK, &check_opt_channel_group,
 128                         "Channel groups", NULL},
 129         {"triggers", 't', 0, G_OPTION_ARG_CALLBACK, &check_opt_triggers,
 130                         "Trigger configuration", NULL},
 131         {"wait-trigger", 'w', 0, G_OPTION_ARG_NONE, &opt_wait_trigger,
 132                         "Wait for trigger", NULL},
 133 #ifdef HAVE_SRD
 134         {"protocol-decoders", 'P', 0, G_OPTION_ARG_STRING_ARRAY, &opt_pds,
 135                         "Protocol decoders to run", NULL},
 136         {"protocol-decoder-annotations", 'A', 0, G_OPTION_ARG_CALLBACK, &check_opt_pd_annotations,
 137                         "Protocol decoder annotation(s) to show", NULL},
 138         {"protocol-decoder-meta", 'M', 0, G_OPTION_ARG_CALLBACK, &check_opt_pd_meta,
 139                         "Protocol decoder meta output to show", NULL},
 140         {"protocol-decoder-binary", 'B', 0, G_OPTION_ARG_CALLBACK, &check_opt_pd_binary,
 141                         "Protocol decoder binary output to show", NULL},
 142         {"protocol-decoder-samplenum", 0, 0, G_OPTION_ARG_NONE, &opt_pd_samplenum,
 143                         "Show sample numbers in decoder output", NULL},
 144 #endif
 145         {"scan", 0, 0, G_OPTION_ARG_NONE, &opt_scan_devs,
 146                         "Scan for devices", NULL},
 147         {"dont-scan", 'D', 0, G_OPTION_ARG_NONE, &opt_dont_scan,
 148                         "Don't auto-scan (use -d spec only)", NULL},
 149         {"show", 0, 0, G_OPTION_ARG_NONE, &opt_show,
 150                         "Show device/format/decoder details", NULL},
 151         {"time", 0, 0, G_OPTION_ARG_CALLBACK, &check_opt_time,
 152                         "How long to sample (ms)", NULL},
 153         {"samples", 0, 0, G_OPTION_ARG_CALLBACK, &check_opt_samples,
 154                         "Number of samples to acquire", NULL},
 155         {"frames", 0, 0, G_OPTION_ARG_CALLBACK, &check_opt_frames,
 156                         "Number of frames to acquire", NULL},
 157         {"continuous", 0, 0, G_OPTION_ARG_NONE, &opt_continuous,
 158                         "Sample continuously", NULL},
 159         {"get", 0, 0, G_OPTION_ARG_CALLBACK, &check_opt_get, "Get device options only", NULL},
 160         {"set", 0, 0, G_OPTION_ARG_NONE, &opt_set, "Set device options only", NULL},
 161         {NULL, 0, 0, 0, NULL, NULL, NULL}
 162 };
 163
 164 /*
 165  * Parses the command line and sets all the 'opt_...' variables.
 166  * Returns zero on success, non-zero otherwise.
 167  */
 168 int parse_options(int argc, char **argv)
 169 {
 170         GError *error = NULL;
 171         GOptionContext *context = g_option_context_new(NULL);
 172         int ret = 1;
 173
 174         g_option_context_add_main_entries(context, optargs, NULL);
 175
 176         if (!g_option_context_parse(context, &argc, &argv, &error)) {
 177                 g_critical("%s", error->message);
 178                 goto done;
 179         }
 180
 181         /*
 182          * Because of encoding issues with filenames (mentioned in the glib
 183          * documentation), we don't check them with a callback function, but
 184          * collect them into arrays and then check if the arrays contain at
 185          * most one element.
 186          */
 187         if (NULL != input_file_array) {
 188                 if (NULL != input_file_array[0] && NULL != input_file_array[1]) {
 189                         g_critical("option \"--input-file/-i\" only allowed once");
 190                         goto done;
 191                 }
 192                 opt_input_file = g_strdup(input_file_array[0]);
 193         }
 194
 195         if (NULL != output_file_array) {
 196                 if (NULL != output_file_array[0] && NULL != output_file_array[1]) {
 197                         g_critical("option \"--output-file/-o\" only allowed once");
 198                         goto done;
 199                 }
 200                 opt_output_file = g_strdup(output_file_array[0]);
 201         }
 202
 203         if (1 != argc) {
 204                 g_critical("superfluous command line argument \"%s\"", argv[1]);
 205                 goto done;
 206         }
 207
 208         ret = 0;
 209
 210 done:
 211         g_option_context_free(context);
 212         g_strfreev(input_file_array);
 213         g_strfreev(output_file_array);
 214         input_file_array = NULL;
 215         output_file_array = NULL;
 216
 217         return ret;
 218 }
 219
 220 void show_help(void)
 221 {
 222         GOptionContext *context = g_option_context_new(NULL);
 223         g_option_context_add_main_entries(context, optargs, NULL);
 224
 225         char *help = g_option_context_get_help(context, TRUE, NULL);
 226         printf("%s", help);
 227         g_free(help);
 228
 229         g_option_context_free(context);
 230
 231 #ifdef HAVE_SRD
 232 #define SHOW_DECODER_TEXT "| -P <decoder> "
 233 #else
 234 #define SHOW_DECODER_TEXT ""
 235 #endif
 236         printf("Example use, typical options:\n");
 237         printf("  -d <driver> --scan\n");
 238         printf("  -d <driver> { --samples N | --frames N | --time T | --continuous }\n");
 239         printf("  { -d <driver> | -I <format> | -O <format> %s} --show\n", SHOW_DECODER_TEXT);
 240         printf("  See the manpage or the wiki for more details.\n");
 241         printf("  Note: --samples/--frames/--time/--continuous is required for acquisition.\n");
 242 }