sigrok-cli: Fix two memory leaks in parse_probestring().

[sigrok-cli.git] / parsers.c

diff --git a/parsers.c b/parsers.c
index 8d0bbe5da8df7803c1f74855db7e26617d843897..e94041764c36bc5ccf7034a7afe6f16b611aefd7 100644 (file)
--- a/parsers.c
+++ b/parsers.c
@@ -1,5 +1,5 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the sigrok-cli project.
  *
  * Copyright (C) 2011 Bert Vermeulen <bert@biot.com>
  *
@@ -25,73 +25,130 @@
 #include <libsigrok/libsigrok.h>
 #include "sigrok-cli.h"
 
-char **parse_probestring(int max_probes, const char *probestring)
+struct sr_probe *find_probe(GSList *probelist, const char *probename)
 {
-       int tmp, b, e, i;
-       char **tokens, **range, **probelist, *name, str[8];
-       gboolean error;
-
-       error = FALSE;
-       range = NULL;
-       if (!(probelist = g_try_malloc0(max_probes * sizeof(char *)))) {
-               /* TODO: Handle errors. */
+       struct sr_probe *probe;
+       GSList *l;
+
+       probe = NULL;
+       for (l = probelist; l; l = l->next) {
+               probe = l->data;
+               if (!strcmp(probe->name, probename))
+                       break;
        }
-       tokens = g_strsplit(probestring, ",", max_probes);
+       probe = l ? l->data : NULL;
+
+       return probe;
+}
+
+GSList *parse_probestring(struct sr_dev_inst *sdi, const char *probestring)
+{
+       struct sr_probe *probe;
+       GSList *probelist;
+       int ret, n, b, e, i;
+       char **tokens, **range, **names, *eptr, str[8];
+
+       if (!probestring || !probestring[0])
+               /* All probes are enabled by default by the driver. */
+               return NULL;
 
+       ret = SR_OK;
+       range = NULL;
+       names = NULL;
+       probelist = NULL;
+       tokens = g_strsplit(probestring, ",", 0);
        for (i = 0; tokens[i]; i++) {
+               if (tokens[i][0] == '\0') {
+                       g_critical("Invalid empty probe.");
+                       ret = SR_ERR;
+                       break;
+               }
                if (strchr(tokens[i], '-')) {
-                       /* A range of probes in the form 1-5. */
+                       /* A range of probes in the form a-b. This will only work
+                        * if the probes are named as numbers -- so every probe
+                        * in the range must exist as a probe name string in the
+                        * device. */
                        range = g_strsplit(tokens[i], "-", 2);
                        if (!range[0] || !range[1] || range[2]) {
                                /* Need exactly two arguments. */
                                g_critical("Invalid probe syntax '%s'.", tokens[i]);
-                               error = TRUE;
-                               break;
+                               ret = SR_ERR;
+                               goto range_fail;
                        }
 
-                       b = strtol(range[0], NULL, 10);
+                       b = strtol(range[0], &eptr, 10);
+                       if (eptr == range[0] || *eptr != '\0') {
+                               g_critical("Invalid probe '%s'.", range[0]);
+                               ret = SR_ERR;
+                               goto range_fail;
+                       }
                        e = strtol(range[1], NULL, 10);
-                       if (b < 1 || e > max_probes || b >= e) {
+                       if (eptr == range[1] || *eptr != '\0') {
+                               g_critical("Invalid probe '%s'.", range[1]);
+                               ret = SR_ERR;
+                               goto range_fail;
+                       }
+                       if (b < 0 || b >= e) {
                                g_critical("Invalid probe range '%s'.", tokens[i]);
-                               error = TRUE;
-                               break;
+                               ret = SR_ERR;
+                               goto range_fail;
                        }
 
                        while (b <= e) {
-                               snprintf(str, 7, "%d", b);
-                               probelist[b - 1] = g_strdup(str);
+                               n = snprintf(str, 8, "%d", b);
+                               if (n < 0 || n > 8) {
+                                       g_critical("Invalid probe '%d'.", b);
+                                       ret = SR_ERR;
+                                       break;
+                               }
+                               probe = find_probe(sdi->probes, str);
+                               if (!probe) {
+                                       g_critical("unknown probe '%d'.", b);
+                                       ret = SR_ERR;
+                                       break;
+                               }
+                               probelist = g_slist_append(probelist, probe);
                                b++;
                        }
+range_fail:
+                       if (range)
+                               g_strfreev(range);
+
+                       if (ret != SR_OK)
+                               break;
                } else {
-                       tmp = strtol(tokens[i], NULL, 10);
-                       if (tmp < 1 || tmp > max_probes) {
-                               g_critical("Invalid probe %d.", tmp);
-                               error = TRUE;
+                       names = g_strsplit(tokens[i], "=", 2);
+                       if (!names[0] || (names[1] && names[2])) {
+                               /* Need one or two arguments. */
+                               g_critical("Invalid probe '%s'.", tokens[i]);
+                               ret = SR_ERR;
                                break;
                        }
 
-                       if ((name = strchr(tokens[i], '='))) {
-                               probelist[tmp - 1] = g_strdup(++name);
-                               if (strlen(probelist[tmp - 1]) > SR_MAX_PROBENAME_LEN)
-                                       probelist[tmp - 1][SR_MAX_PROBENAME_LEN] = 0;
-                       } else {
-                               snprintf(str, 7, "%d", tmp);
-                               probelist[tmp - 1] = g_strdup(str);
+                       probe = find_probe(sdi->probes, names[0]);
+                       if (!probe) {
+                               g_critical("unknown probe '%s'.", names[0]);
+                               ret = SR_ERR;
+                               break;
                        }
+                       if (names[1]) {
+                               /* Rename probe. */
+                               g_free(probe->name);
+                               probe->name = g_strdup(names[1]);
+                       }
+                       probelist = g_slist_append(probelist, probe);
+
+                       if (names)
+                               g_strfreev(names);
                }
        }
 
-       if (error) {
-               for (i = 0; i < max_probes; i++)
-                       if (probelist[i])
-                               g_free(probelist[i]);
-               g_free(probelist);
+       if (ret != SR_OK) {
+               g_slist_free(probelist);
                probelist = NULL;
        }
 
        g_strfreev(tokens);
-       if (range)
-               g_strfreev(range);
 
        return probelist;
 }