parsers.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2011 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 <stdio.h>
  21 #include <stdlib.h>
  22 #include <stdint.h>
  23 #include <string.h>
  24 #include <glib.h>
  25 #include <sigrok.h>
  26 #include "sigrok-cli.h"
  27
  28 char **parse_probestring(int max_probes, const char *probestring)
  29 {
  30         int tmp, b, e, i;
  31         char **tokens, **range, **probelist, *name, str[8];
  32         gboolean error;
  33
  34         error = FALSE;
  35         range = NULL;
  36         if (!(probelist = g_try_malloc0(max_probes * sizeof(char *)))) {
  37                 /* TODO: Handle errors. */
  38         }
  39         tokens = g_strsplit(probestring, ",", max_probes);
  40
  41         for (i = 0; tokens[i]; i++) {
  42                 if (strchr(tokens[i], '-')) {
  43                         /* A range of probes in the form 1-5. */
  44                         range = g_strsplit(tokens[i], "-", 2);
  45                         if (!range[0] || !range[1] || range[2]) {
  46                                 /* Need exactly two arguments. */
  47                                 printf("Invalid probe syntax '%s'.\n",
  48                                        tokens[i]);
  49                                 error = TRUE;
  50                                 break;
  51                         }
  52
  53                         b = strtol(range[0], NULL, 10);
  54                         e = strtol(range[1], NULL, 10);
  55                         if (b < 1 || e > max_probes || b >= e) {
  56                                 printf("Invalid probe range '%s'.\n",
  57                                        tokens[i]);
  58                                 error = TRUE;
  59                                 break;
  60                         }
  61
  62                         while (b <= e) {
  63                                 snprintf(str, 7, "%d", b);
  64                                 probelist[b - 1] = g_strdup(str);
  65                                 b++;
  66                         }
  67                 } else {
  68                         tmp = strtol(tokens[i], NULL, 10);
  69                         if (tmp < 1 || tmp > max_probes) {
  70                                 printf("Invalid probe %d.\n", tmp);
  71                                 error = TRUE;
  72                                 break;
  73                         }
  74
  75                         if ((name = strchr(tokens[i], '='))) {
  76                                 probelist[tmp - 1] = g_strdup(++name);
  77                                 if (strlen(probelist[tmp - 1]) > SR_MAX_PROBENAME_LEN)
  78                                         probelist[tmp - 1][SR_MAX_PROBENAME_LEN] = 0;
  79                         } else {
  80                                 snprintf(str, 7, "%d", tmp);
  81                                 probelist[tmp - 1] = g_strdup(str);
  82                         }
  83                 }
  84         }
  85
  86         if (error) {
  87                 for (i = 0; i < max_probes; i++)
  88                         if (probelist[i])
  89                                 g_free(probelist[i]);
  90                 g_free(probelist);
  91                 probelist = NULL;
  92         }
  93
  94         g_strfreev(tokens);
  95         if (range)
  96                 g_strfreev(range);
  97
  98         return probelist;
  99 }
 100
 101 GHashTable *parse_generic_arg(const char *arg)
 102 {
 103         GHashTable *hash;
 104         int i;
 105         char **elements, *e;
 106
 107         if (!arg || !arg[0])
 108                 return NULL;
 109
 110         hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
 111         elements = g_strsplit(arg, ":", 0);
 112         g_hash_table_insert(hash, g_strdup("sigrok_key"), g_strdup(elements[0]));
 113         for (i = 1; elements[i]; i++) {
 114                 e = strchr(elements[i], '=');
 115                 if (!e)
 116                         g_hash_table_insert(hash, g_strdup(elements[i]), NULL);
 117                 else {
 118                         *e++ = '\0';
 119                         g_hash_table_insert(hash, g_strdup(elements[i]), g_strdup(e));
 120                 }
 121         }
 122         g_strfreev(elements);
 123
 124         return hash;
 125 }
 126
 127 struct sr_dev *parse_devstring(const char *devstring)
 128 {
 129         struct sr_dev *dev, *d;
 130         struct sr_dev_plugin **plugins;
 131         GSList *devs, *l;
 132         int i, num_devs, dev_num, dev_cnt;
 133         char *tmp;
 134
 135         if (!devstring)
 136                 return NULL;
 137
 138         dev = NULL;
 139         dev_num = strtol(devstring, &tmp, 10);
 140         if (tmp != devstring) {
 141                 /* argument is numeric, meaning a device ID. Make all driver
 142                  * plugins scan for devices.
 143                  */
 144                 num_devs = num_real_devs();
 145                 if (dev_num < 0 || dev_num >= num_devs)
 146                         return NULL;
 147
 148                 dev_cnt = 0;
 149                 devs = sr_dev_list();
 150                 for (l = devs; l; l = l->next) {
 151                         d = l->data;
 152                         if (sr_dev_has_hwcap(d, SR_HWCAP_DEMO_DEV))
 153                                 continue;
 154                         if (dev_cnt == dev_num) {
 155                                 if (dev_num == dev_cnt) {
 156                                         dev = d;
 157                                         break;
 158                                 }
 159                         }
 160                         dev_cnt++;
 161                 }
 162         } else {
 163                 /* select device by driver -- only initialize that driver,
 164                  * no need to let them all scan
 165                  */
 166                 dev = NULL;
 167                 plugins = sr_hw_list();
 168                 for (i = 0; plugins[i]; i++) {
 169                         if (strcmp(plugins[i]->name, devstring))
 170                                 continue;
 171                         num_devs = sr_hw_init(plugins[i]);
 172                         if (num_devs == 1) {
 173                                 devs = sr_dev_list();
 174                                 dev = devs->data;
 175                         } else if (num_devs > 1) {
 176                                 printf("driver '%s' found %d devices, select by ID instead.\n",
 177                                                 devstring, num_devs);
 178                         }
 179                         /* fall through: selected driver found no devices */
 180                         break;
 181                 }
 182         }
 183
 184         return dev;
 185 }