parsers.c

   1 /*
   2  * This file is part of the sigrok-cli 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 "sigrok-cli.h"
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stdint.h>
  24 #include <string.h>
  25 #include <glib.h>
  26
  27 struct sr_channel *find_channel(GSList *channellist, const char *channelname)
  28 {
  29         struct sr_channel *ch;
  30         GSList *l;
  31
  32         ch = NULL;
  33         for (l = channellist; l; l = l->next) {
  34                 ch = l->data;
  35                 if (!strcmp(ch->name, channelname))
  36                         break;
  37         }
  38         ch = l ? l->data : NULL;
  39
  40         return ch;
  41 }
  42
  43 GSList *parse_channelstring(struct sr_dev_inst *sdi, const char *channelstring)
  44 {
  45         struct sr_channel *ch;
  46         GSList *channellist;
  47         int ret, n, b, e, i;
  48         char **tokens, **range, **names, *eptr, str[8];
  49
  50         if (!channelstring || !channelstring[0])
  51                 /* Use all channels by default. */
  52                 return g_slist_copy(sdi->channels);
  53
  54         ret = SR_OK;
  55         range = NULL;
  56         names = NULL;
  57         channellist = NULL;
  58         tokens = g_strsplit(channelstring, ",", 0);
  59         for (i = 0; tokens[i]; i++) {
  60                 if (tokens[i][0] == '\0') {
  61                         g_critical("Invalid empty channel.");
  62                         ret = SR_ERR;
  63                         break;
  64                 }
  65                 if (strchr(tokens[i], '-')) {
  66                         /* A range of channels in the form a-b. This will only work
  67                          * if the channels are named as numbers -- so every channel
  68                          * in the range must exist as a channel name string in the
  69                          * device. */
  70                         range = g_strsplit(tokens[i], "-", 2);
  71                         if (!range[0] || !range[1] || range[2]) {
  72                                 /* Need exactly two arguments. */
  73                                 g_critical("Invalid channel syntax '%s'.", tokens[i]);
  74                                 ret = SR_ERR;
  75                                 goto range_fail;
  76                         }
  77
  78                         b = strtol(range[0], &eptr, 10);
  79                         if (eptr == range[0] || *eptr != '\0') {
  80                                 g_critical("Invalid channel '%s'.", range[0]);
  81                                 ret = SR_ERR;
  82                                 goto range_fail;
  83                         }
  84                         e = strtol(range[1], NULL, 10);
  85                         if (eptr == range[1] || *eptr != '\0') {
  86                                 g_critical("Invalid channel '%s'.", range[1]);
  87                                 ret = SR_ERR;
  88                                 goto range_fail;
  89                         }
  90                         if (b < 0 || b >= e) {
  91                                 g_critical("Invalid channel range '%s'.", tokens[i]);
  92                                 ret = SR_ERR;
  93                                 goto range_fail;
  94                         }
  95
  96                         while (b <= e) {
  97                                 n = snprintf(str, 8, "%d", b);
  98                                 if (n < 0 || n > 8) {
  99                                         g_critical("Invalid channel '%d'.", b);
 100                                         ret = SR_ERR;
 101                                         break;
 102                                 }
 103                                 ch = find_channel(sdi->channels, str);
 104                                 if (!ch) {
 105                                         g_critical("unknown channel '%d'.", b);
 106                                         ret = SR_ERR;
 107                                         break;
 108                                 }
 109                                 channellist = g_slist_append(channellist, ch);
 110                                 b++;
 111                         }
 112 range_fail:
 113                         if (range)
 114                                 g_strfreev(range);
 115
 116                         if (ret != SR_OK)
 117                                 break;
 118                 } else {
 119                         names = g_strsplit(tokens[i], "=", 2);
 120                         if (!names[0] || (names[1] && names[2])) {
 121                                 /* Need one or two arguments. */
 122                                 g_critical("Invalid channel '%s'.", tokens[i]);
 123                                 g_strfreev(names);
 124                                 ret = SR_ERR;
 125                                 break;
 126                         }
 127
 128                         ch = find_channel(sdi->channels, names[0]);
 129                         if (!ch) {
 130                                 g_critical("unknown channel '%s'.", names[0]);
 131                                 g_strfreev(names);
 132                                 ret = SR_ERR;
 133                                 break;
 134                         }
 135                         if (names[1]) {
 136                                 /* Rename channel. */
 137                                 g_free(ch->name);
 138                                 ch->name = g_strdup(names[1]);
 139                         }
 140                         channellist = g_slist_append(channellist, ch);
 141
 142                         g_strfreev(names);
 143                 }
 144         }
 145
 146         if (ret != SR_OK) {
 147                 g_slist_free(channellist);
 148                 channellist = NULL;
 149         }
 150
 151         g_strfreev(tokens);
 152
 153         return channellist;
 154 }
 155
 156 GHashTable *parse_generic_arg(const char *arg, gboolean sep_first)
 157 {
 158         GHashTable *hash;
 159         int i;
 160         char **elements, *e;
 161
 162         if (!arg || !arg[0])
 163                 return NULL;
 164
 165         i = 0;
 166         hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 167                         g_free, g_free);
 168         elements = g_strsplit(arg, ":", 0);
 169         if (sep_first)
 170                 g_hash_table_insert(hash, g_strdup("sigrok_key"),
 171                                 g_strdup(elements[i++]));
 172         for (; elements[i]; i++) {
 173                 e = strchr(elements[i], '=');
 174                 if (!e)
 175                         g_hash_table_insert(hash, g_strdup(elements[i]), NULL);
 176                 else {
 177                         *e++ = '\0';
 178                         g_hash_table_insert(hash, g_strdup(elements[i]), g_strdup(e));
 179                 }
 180         }
 181         g_strfreev(elements);
 182
 183         return hash;
 184 }
 185
 186 static char *strcanon(const char *str)
 187 {
 188         int p0, p1;
 189         char *s;
 190
 191         /* Returns newly allocated string. */
 192         s = g_ascii_strdown(str, -1);
 193         for (p0 = p1 = 0; str[p0]; p0++) {
 194                 if ((s[p0] >= 'a' && s[p0] <= 'z')
 195                                 || (s[p0] >= '0' && s[p0] <= '9'))
 196                         s[p1++] = s[p0];
 197         }
 198         s[p1] = '\0';
 199
 200         return s;
 201 }
 202
 203 int canon_cmp(const char *str1, const char *str2)
 204 {
 205         int ret;
 206         char *s1, *s2;
 207
 208         s1 = strcanon(str1);
 209         s2 = strcanon(str2);
 210         ret = g_ascii_strcasecmp(s1, s2);
 211         g_free(s2);
 212         g_free(s1);
 213
 214         return ret;
 215 }