Small variable naming fix to avoid confusion.
[sigrok-cli.git] / 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 }