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