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 static struct sr_probe *find_probe(GSList *probelist, const char *probename)
  28 {
  29         struct sr_probe *probe;
  30         GSList *l;
  31
  32         probe = NULL;
  33         for (l = probelist; l; l = l->next) {
  34                 probe = l->data;
  35                 if (!strcmp(probe->name, probename))
  36                         break;
  37         }
  38         probe = l ? l->data : NULL;
  39
  40         return probe;
  41 }
  42
  43 GSList *parse_probestring(struct sr_dev_inst *sdi, const char *probestring)
  44 {
  45         struct sr_probe *probe;
  46         GSList *probelist;
  47         int ret, n, b, e, i;
  48         char **tokens, **range, **names, *eptr, str[8];
  49
  50         if (!probestring || !probestring[0])
  51                 /* All probes are enabled by default by the driver. */
  52                 return NULL;
  53
  54         ret = SR_OK;
  55         range = NULL;
  56         names = NULL;
  57         probelist = NULL;
  58         tokens = g_strsplit(probestring, ",", 0);
  59         for (i = 0; tokens[i]; i++) {
  60                 if (tokens[i][0] == '\0') {
  61                         g_critical("Invalid empty probe.");
  62                         ret = SR_ERR;
  63                         break;
  64                 }
  65                 if (strchr(tokens[i], '-')) {
  66                         /* A range of probes in the form a-b. This will only work
  67                          * if the probes are named as numbers -- so every probe
  68                          * in the range must exist as a probe 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 probe 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 probe '%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 probe '%s'.", range[1]);
  87                                 ret = SR_ERR;
  88                                 goto range_fail;
  89                         }
  90                         if (b < 0 || b >= e) {
  91                                 g_critical("Invalid probe 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 probe '%d'.", b);
 100                                         ret = SR_ERR;
 101                                         break;
 102                                 }
 103                                 probe = find_probe(sdi->probes, str);
 104                                 if (!probe) {
 105                                         g_critical("unknown probe '%d'.", b);
 106                                         ret = SR_ERR;
 107                                         break;
 108                                 }
 109                                 probelist = g_slist_append(probelist, probe);
 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 probe '%s'.", tokens[i]);
 123                                 ret = SR_ERR;
 124                                 break;
 125                         }
 126
 127                         probe = find_probe(sdi->probes, names[0]);
 128                         if (!probe) {
 129                                 g_critical("unknown probe '%s'.", names[0]);
 130                                 ret = SR_ERR;
 131                                 break;
 132                         }
 133                         if (names[1]) {
 134                                 /* Rename probe. */
 135                                 g_free(probe->name);
 136                                 probe->name = g_strdup(names[1]);
 137                         }
 138                         probelist = g_slist_append(probelist, probe);
 139
 140                         if (names)
 141                                 g_strfreev(names);
 142                 }
 143         }
 144
 145         if (ret != SR_OK) {
 146                 g_slist_free(probelist);
 147                 probelist = NULL;
 148         }
 149
 150         g_strfreev(tokens);
 151
 152         return probelist;
 153 }
 154
 155 GHashTable *parse_generic_arg(const char *arg, gboolean sep_first)
 156 {
 157         GHashTable *hash;
 158         int i;
 159         char **elements, *e;
 160
 161         if (!arg || !arg[0])
 162                 return NULL;
 163
 164         i = 0;
 165         hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 166                         g_free, g_free);
 167         elements = g_strsplit(arg, ":", 0);
 168         if (sep_first)
 169                 g_hash_table_insert(hash, g_strdup("sigrok_key"),
 170                                 g_strdup(elements[i++]));
 171         for (; elements[i]; i++) {
 172                 e = strchr(elements[i], '=');
 173                 if (!e)
 174                         g_hash_table_insert(hash, g_strdup(elements[i]), NULL);
 175                 else {
 176                         *e++ = '\0';
 177                         g_hash_table_insert(hash, g_strdup(elements[i]), g_strdup(e));
 178                 }
 179         }
 180         g_strfreev(elements);
 181
 182         return hash;
 183 }
 184
 185 static char *strcanon(const char *str)
 186 {
 187         int p0, p1;
 188         char *s;
 189
 190         /* Returns newly allocated string. */
 191         s = g_ascii_strdown(str, -1);
 192         for (p0 = p1 = 0; str[p0]; p0++) {
 193                 if ((s[p0] >= 'a' && s[p0] <= 'z')
 194                                 || (s[p0] >= '0' && s[p0] <= '9'))
 195                         s[p1++] = s[p0];
 196         }
 197         s[p1] = '\0';
 198
 199         return s;
 200 }
 201
 202 int canon_cmp(const char *str1, const char *str2)
 203 {
 204         int ret;
 205         char *s1, *s2;
 206
 207         s1 = strcanon(str1);
 208         s2 = strcanon(str2);
 209         ret = g_ascii_strcasecmp(s1, s2);
 210         g_free(s2);
 211         g_free(s1);
 212
 213         return ret;
 214 }