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         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                                 break;
  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                                 break;
  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                                 break;
  89                         }
  90                         if (b < 0 || b >= e) {
  91                                 g_critical("Invalid probe range '%s'.", tokens[i]);
  92                                 ret = SR_ERR;
  93                                 break;
  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                         if (ret != SR_OK)
 113                                 break;
 114                 } else {
 115                         names = g_strsplit(tokens[i], "=", 2);
 116                         if (!names[0] || (names[1] && names[2])) {
 117                                 /* Need one or two arguments. */
 118                                 g_critical("Invalid probe '%s'.", tokens[i]);
 119                                 ret = SR_ERR;
 120                                 break;
 121                         }
 122
 123                         probe = find_probe(sdi->probes, names[0]);
 124                         if (!probe) {
 125                                 g_critical("unknown probe '%s'.", names[0]);
 126                                 ret = SR_ERR;
 127                                 break;
 128                         }
 129                         if (names[1]) {
 130                                 /* Rename probe. */
 131                                 g_free(probe->name);
 132                                 probe->name = g_strdup(names[1]);
 133                         }
 134                         probelist = g_slist_append(probelist, probe);
 135                 }
 136         }
 137         if (range)
 138                 g_strfreev(range);
 139
 140         if (ret != SR_OK) {
 141                 g_slist_free(probelist);
 142                 probelist = NULL;
 143         }
 144
 145         g_strfreev(tokens);
 146
 147         return probelist;
 148 }
 149
 150 GHashTable *parse_generic_arg(const char *arg, gboolean sep_first)
 151 {
 152         GHashTable *hash;
 153         int i;
 154         char **elements, *e;
 155
 156         if (!arg || !arg[0])
 157                 return NULL;
 158
 159         i = 0;
 160         hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 161                         g_free, g_free);
 162         elements = g_strsplit(arg, ":", 0);
 163         if (sep_first)
 164                 g_hash_table_insert(hash, g_strdup("sigrok_key"),
 165                                 g_strdup(elements[i++]));
 166         for (; elements[i]; i++) {
 167                 e = strchr(elements[i], '=');
 168                 if (!e)
 169                         g_hash_table_insert(hash, g_strdup(elements[i]), NULL);
 170                 else {
 171                         *e++ = '\0';
 172                         g_hash_table_insert(hash, g_strdup(elements[i]), g_strdup(e));
 173                 }
 174         }
 175         g_strfreev(elements);
 176
 177         return hash;
 178 }
 179
 180 char *strcanon(const char *str)
 181 {
 182         int p0, p1;
 183         char *s;
 184
 185         /* Returns newly allocated string. */
 186         s = g_ascii_strdown(str, -1);
 187         for (p0 = p1 = 0; str[p0]; p0++) {
 188                 if ((s[p0] >= 'a' && s[p0] <= 'z')
 189                                 || (s[p0] >= '0' && s[p0] <= '9'))
 190                         s[p1++] = s[p0];
 191         }
 192         s[p1] = '\0';
 193
 194         return s;
 195 }
 196
 197 int canon_cmp(const char *str1, const char *str2)
 198 {
 199         int ret;
 200         char *s1, *s2;
 201
 202         s1 = strcanon(str1);
 203         s2 = strcanon(str2);
 204         ret = g_ascii_strcasecmp(s1, s2);
 205         g_free(s2);
 206         g_free(s1);
 207
 208         return ret;
 209 }