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