Code cleanup

diff --git a/src/sigrok.c b/src/sigrok.c
index d690043..9dc8831 100644 (file)
--- a/src/sigrok.c
+++ b/src/sigrok.c
@@ -36,7 +36,6 @@
 static pthread_t sr_thread;
 static int sr_thread_running = FALSE;
 GSList *config_devices;
-static struct sr_session *session = NULL;
 static int num_devices;
 static int loglevel = SR_LOG_WARN;
 static struct sr_context *sr_ctx;
@@ -52,8 +51,8 @@ struct config_device {
 };
 
 
-static int cd_logger(void *cb_data, int msg_loglevel, const char *format,
-               va_list args)
+static int sigrok_log_callback(void*cb_data __attribute__((unused)),
+               int msg_loglevel, const char *format, va_list args)
 {
        char s[512];
 
@@ -75,8 +74,9 @@ static int sigrok_config_device(oconfig_item_t *ci)
                ERROR("malloc() failed.");
                return 1;
        }
-       memset(cfdev, 0, sizeof(struct config_device));
+       memset(cfdev, 0, sizeof(*cfdev));
        if (cf_util_get_string(ci, &cfdev->name)) {
+               free(cfdev);
                WARNING("Invalid device name.");
                return 1;
        }
@@ -85,6 +85,7 @@ static int sigrok_config_device(oconfig_item_t *ci)
        for (i = 0; i < ci->children_num; i++) {
                item = ci->children + i;
                if (item->values_num != 1) {
+                       free(cfdev);
                        WARNING("Missing value for '%s'.", item->key);
                        return 1;
                }
@@ -139,15 +140,8 @@ static void sigrok_feed_callback(const struct sr_dev_inst *sdi,
        const struct sr_datafeed_analog *analog;
        struct config_device *cfdev;
        GSList *l;
-       value_t *values;
+       value_t value;
        value_list_t vl = VALUE_LIST_INIT;
-       int num_probes, s, p;
-
-       if (packet->type == SR_DF_END) {
-               /* TODO: try to restart acquisition after a delay? */
-               INFO("oops! ended");
-               return;
-       }
 
        /* Find this device's configuration. */
        cfdev = NULL;
@@ -164,33 +158,32 @@ static void sigrok_feed_callback(const struct sr_dev_inst *sdi,
                return;
        }
 
-       if (packet->type == SR_DF_ANALOG) {
-               if (cdtime() - cfdev->last_dispatch < cfdev->min_dispatch_interval)
-                       return;
-
-               analog = packet->payload;
-               num_probes = g_slist_length(analog->probes);
-               if (!(values = malloc(sizeof(value_t) * num_probes))) {
-                       ERROR("malloc() failed.");
-                       return;
-               }
-               for (s = 0; s < analog->num_samples; s++) {
-                       for (p = 0; p < num_probes; p++) {
-                               values[s + p].gauge = analog->data[s + p];
-                       }
-               }
-               vl.values = values;
-               vl.values_len = num_probes;
-               sstrncpy(vl.host, hostname_g, sizeof(vl.host));
-               sstrncpy(vl.plugin, "sigrok", sizeof(vl.plugin));
-               ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance),
-                               "%s", cfdev->name);
-               sstrncpy(vl.type, "gauge", sizeof(vl.type));
-               plugin_dispatch_values(&vl);
-
-               cfdev->last_dispatch = cdtime();
+       if (packet->type == SR_DF_END) {
+               /* TODO: try to restart acquisition after a delay? */
+               INFO("sigrok: acquisition for '%s' ended.", cfdev->name);
+               return;
        }
 
+       if (packet->type != SR_DF_ANALOG)
+               return;
+
+       if (cdtime() - cfdev->last_dispatch < cfdev->min_dispatch_interval)
+               return;
+
+       /* Ignore all but the first sample on the first probe. */
+       analog = packet->payload;
+       value.gauge = analog->data[0];
+       vl.values = &value;
+       vl.values_len = 1;
+       sstrncpy(vl.host, hostname_g, sizeof(vl.host));
+       sstrncpy(vl.plugin, "sigrok", sizeof(vl.plugin));
+       ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance),
+                       "%s", cfdev->name);
+       sstrncpy(vl.type, "gauge", sizeof(vl.type));
+       plugin_dispatch_values(&vl);
+
+       cfdev->last_dispatch = cdtime();
+
 }
 
 static int sigrok_init_driver(struct config_device *cfdev,
@@ -254,7 +247,7 @@ static void *thread_init(void *arg __attribute__((unused)))
        struct config_device *cfdev;
        int ret, i;
 
-       sr_log_callback_set(cd_logger, NULL);
+       sr_log_callback_set(sigrok_log_callback, NULL);
        sr_log_loglevel_set(loglevel);
 
        if ((ret = sr_init(&sr_ctx)) != SR_OK) {
@@ -262,7 +255,7 @@ static void *thread_init(void *arg __attribute__((unused)))
                return NULL;
        }
 
-       if (!(session = sr_session_new()))
+       if (!sr_session_new())
                return NULL;
 
        num_devices = 0;