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