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